/* Machine independent support for SVR4 /proc (process file system) for GDB.
- Copyright 1991, 1992-98, 1999 Free Software Foundation, Inc.
- Written by Fred Fish at Cygnus Support. Changes for sysv4.2mp procfs
- compatibility by Geoffrey Noer at Cygnus Solutions.
+
+ Copyright (C) 1999, 2000, 2001, 2002, 2003, 2006, 2007, 2008
+ Free Software Foundation, Inc.
+
+ Written by Michael Snyder at Cygnus Solutions.
+ Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+#include "defs.h"
+#include "inferior.h"
+#include "target.h"
+#include "gdbcore.h"
+#include "elf-bfd.h" /* for elfcore_write_* */
+#include "gdbcmd.h"
+#include "gdbthread.h"
+#include "regcache.h"
-/* N O T E S
-
- For information on the details of using /proc consult section proc(4)
- in the UNIX System V Release 4 System Administrator's Reference Manual.
+#if defined (NEW_PROC_API)
+#define _STRUCTURED_PROC 1 /* Should be done by configure script. */
+#endif
- The general register and floating point register sets are manipulated
- separately. This file makes the assumption that if FP0_REGNUM is
- defined, then support for the floating point register set is desired,
- regardless of whether or not the actual target has floating point hardware.
+#include <sys/procfs.h>
+#ifdef HAVE_SYS_FAULT_H
+#include <sys/fault.h>
+#endif
+#ifdef HAVE_SYS_SYSCALL_H
+#include <sys/syscall.h>
+#endif
+#include <sys/errno.h>
+#include "gdb_wait.h"
+#include <signal.h>
+#include <ctype.h>
+#include "gdb_string.h"
+#include "gdb_assert.h"
+#include "inflow.h"
+#include "auxv.h"
+/*
+ * PROCFS.C
+ *
+ * This module provides the interface between GDB and the
+ * /proc file system, which is used on many versions of Unix
+ * as a means for debuggers to control other processes.
+ * Examples of the systems that use this interface are:
+ * Irix
+ * Solaris
+ * OSF
+ * Unixware
+ * AIX5
+ *
+ * /proc works by imitating a file system: you open a simulated file
+ * that represents the process you wish to interact with, and
+ * perform operations on that "file" in order to examine or change
+ * the state of the other process.
+ *
+ * The most important thing to know about /proc and this module
+ * is that there are two very different interfaces to /proc:
+ * One that uses the ioctl system call, and
+ * another that uses read and write system calls.
+ * This module has to support both /proc interfaces. This means
+ * that there are two different ways of doing every basic operation.
+ *
+ * In order to keep most of the code simple and clean, I have
+ * defined an interface "layer" which hides all these system calls.
+ * An ifdef (NEW_PROC_API) determines which interface we are using,
+ * and most or all occurrances of this ifdef should be confined to
+ * this interface layer.
*/
-#include "defs.h"
+/* Determine which /proc API we are using:
+ The ioctl API defines PIOCSTATUS, while
+ the read/write (multiple fd) API never does. */
+#ifdef NEW_PROC_API
#include <sys/types.h>
-#include <time.h>
-#include <sys/fault.h>
-#include <sys/syscall.h>
-#include <sys/procfs.h>
-#include <fcntl.h>
-#include <errno.h>
-#include "gdb_string.h"
-#include <stropts.h>
-#include <poll.h>
-#include <unistd.h>
-#include "gdb_stat.h"
+#include "gdb_dirent.h" /* opendir/readdir, for listing the LWP's */
+#endif
-#include "inferior.h"
-#include "target.h"
-#include "command.h"
-#include "gdbcore.h"
-#include "gdbthread.h"
+#include <fcntl.h> /* for O_RDONLY */
+#include <unistd.h> /* for "X_OK" */
+#include "gdb_stat.h" /* for struct stat */
-#if !defined(SYS_lwp_create) && defined(SYS_lwpcreate)
-#define SYS_lwp_create SYS_lwpcreate
-#endif
+/* Note: procfs-utils.h must be included after the above system header
+ files, because it redefines various system calls using macros.
+ This may be incompatible with the prototype declarations. */
-#if !defined(SYS_lwp_exit) && defined(SYS_lwpexit)
-#define SYS_lwp_exit SYS_lwpexit
-#endif
+#include "proc-utils.h"
-#if !defined(SYS_lwp_wait) && defined(SYS_lwpwait)
-#define SYS_lwp_wait SYS_lwpwait
-#endif
+/* Prototypes for supply_gregset etc. */
+#include "gregset.h"
+
+/* =================== TARGET_OPS "MODULE" =================== */
+
+/*
+ * This module defines the GDB target vector and its methods.
+ */
+
+static void procfs_open (char *, int);
+static void procfs_attach (char *, int);
+static void procfs_detach (char *, int);
+static void procfs_resume (ptid_t, int, enum target_signal);
+static int procfs_can_run (void);
+static void procfs_stop (void);
+static void procfs_files_info (struct target_ops *);
+static void procfs_fetch_registers (struct regcache *, int);
+static void procfs_store_registers (struct regcache *, int);
+static void procfs_notice_signals (ptid_t);
+static void procfs_prepare_to_store (struct regcache *);
+static void procfs_kill_inferior (void);
+static void procfs_mourn_inferior (void);
+static void procfs_create_inferior (char *, char *, char **, int);
+static ptid_t procfs_wait (ptid_t, struct target_waitstatus *);
+static int procfs_xfer_memory (CORE_ADDR, char *, int, int,
+ struct mem_attrib *attrib,
+ struct target_ops *);
+static LONGEST procfs_xfer_partial (struct target_ops *ops,
+ enum target_object object,
+ const char *annex,
+ void *readbuf, const void *writebuf,
+ ULONGEST offset, LONGEST len);
+
+static int procfs_thread_alive (ptid_t);
+
+void procfs_find_new_threads (void);
+char *procfs_pid_to_str (ptid_t);
+
+static int proc_find_memory_regions (int (*) (CORE_ADDR,
+ unsigned long,
+ int, int, int,
+ void *),
+ void *);
+
+static char * procfs_make_note_section (bfd *, int *);
+
+static int procfs_can_use_hw_breakpoint (int, int, int);
+
+struct target_ops procfs_ops; /* the target vector */
+
+static void
+init_procfs_ops (void)
+{
+ procfs_ops.to_shortname = "procfs";
+ procfs_ops.to_longname = "Unix /proc child process";
+ procfs_ops.to_doc =
+ "Unix /proc child process (started by the \"run\" command).";
+ procfs_ops.to_open = procfs_open;
+ procfs_ops.to_can_run = procfs_can_run;
+ procfs_ops.to_create_inferior = procfs_create_inferior;
+ procfs_ops.to_kill = procfs_kill_inferior;
+ procfs_ops.to_mourn_inferior = procfs_mourn_inferior;
+ procfs_ops.to_attach = procfs_attach;
+ procfs_ops.to_detach = procfs_detach;
+ procfs_ops.to_wait = procfs_wait;
+ procfs_ops.to_resume = procfs_resume;
+ procfs_ops.to_prepare_to_store = procfs_prepare_to_store;
+ procfs_ops.to_fetch_registers = procfs_fetch_registers;
+ procfs_ops.to_store_registers = procfs_store_registers;
+ procfs_ops.to_xfer_partial = procfs_xfer_partial;
+ procfs_ops.deprecated_xfer_memory = procfs_xfer_memory;
+ procfs_ops.to_insert_breakpoint = memory_insert_breakpoint;
+ procfs_ops.to_remove_breakpoint = memory_remove_breakpoint;
+ procfs_ops.to_notice_signals = procfs_notice_signals;
+ procfs_ops.to_files_info = procfs_files_info;
+ procfs_ops.to_stop = procfs_stop;
+
+ procfs_ops.to_terminal_init = terminal_init_inferior;
+ procfs_ops.to_terminal_inferior = terminal_inferior;
+ procfs_ops.to_terminal_ours_for_output = terminal_ours_for_output;
+ procfs_ops.to_terminal_ours = terminal_ours;
+ procfs_ops.to_terminal_save_ours = terminal_save_ours;
+ procfs_ops.to_terminal_info = child_terminal_info;
+
+ procfs_ops.to_find_new_threads = procfs_find_new_threads;
+ procfs_ops.to_thread_alive = procfs_thread_alive;
+ procfs_ops.to_pid_to_str = procfs_pid_to_str;
+
+ procfs_ops.to_has_all_memory = 1;
+ procfs_ops.to_has_memory = 1;
+ procfs_ops.to_has_execution = 1;
+ procfs_ops.to_has_stack = 1;
+ procfs_ops.to_has_registers = 1;
+ procfs_ops.to_stratum = process_stratum;
+ procfs_ops.to_has_thread_control = tc_schedlock;
+ procfs_ops.to_find_memory_regions = proc_find_memory_regions;
+ procfs_ops.to_make_corefile_notes = procfs_make_note_section;
+ procfs_ops.to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint;
+ procfs_ops.to_magic = OPS_MAGIC;
+}
+
+/* =================== END, TARGET_OPS "MODULE" =================== */
-#if !defined(SYS_lwp_self) && defined(SYS_lwpself)
-#define SYS_lwp_self SYS_lwpself
+/*
+ * World Unification:
+ *
+ * Put any typedefs, defines etc. here that are required for
+ * the unification of code that handles different versions of /proc.
+ */
+
+#ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */
+#ifdef WA_READ
+ enum { READ_WATCHFLAG = WA_READ,
+ WRITE_WATCHFLAG = WA_WRITE,
+ EXEC_WATCHFLAG = WA_EXEC,
+ AFTER_WATCHFLAG = WA_TRAPAFTER
+ };
+#endif
+#else /* Irix method for watchpoints */
+ enum { READ_WATCHFLAG = MA_READ,
+ WRITE_WATCHFLAG = MA_WRITE,
+ EXEC_WATCHFLAG = MA_EXEC,
+ AFTER_WATCHFLAG = 0 /* trapafter not implemented */
+ };
+#endif
+
+/* gdb_sigset_t */
+#ifdef HAVE_PR_SIGSET_T
+typedef pr_sigset_t gdb_sigset_t;
+#else
+typedef sigset_t gdb_sigset_t;
#endif
-#if !defined(SYS_lwp_info) && defined(SYS_lwpinfo)
-#define SYS_lwp_info SYS_lwpinfo
+/* sigaction */
+#ifdef HAVE_PR_SIGACTION64_T
+typedef pr_sigaction64_t gdb_sigaction_t;
+#else
+typedef struct sigaction gdb_sigaction_t;
#endif
-#if !defined(SYS_lwp_private) && defined(SYS_lwpprivate)
-#define SYS_lwp_private SYS_lwpprivate
+/* siginfo */
+#ifdef HAVE_PR_SIGINFO64_T
+typedef pr_siginfo64_t gdb_siginfo_t;
+#else
+typedef struct siginfo gdb_siginfo_t;
#endif
-#if !defined(SYS_lwp_kill) && defined(SYS_lwpkill)
-#define SYS_lwp_kill SYS_lwpkill
+/* gdb_premptysysset */
+#ifdef premptysysset
+#define gdb_premptysysset premptysysset
+#else
+#define gdb_premptysysset premptyset
#endif
-#if !defined(SYS_lwp_suspend) && defined(SYS_lwpsuspend)
-#define SYS_lwp_suspend SYS_lwpsuspend
+/* praddsysset */
+#ifdef praddsysset
+#define gdb_praddsysset praddsysset
+#else
+#define gdb_praddsysset praddset
#endif
-#if !defined(SYS_lwp_continue) && defined(SYS_lwpcontinue)
-#define SYS_lwp_continue SYS_lwpcontinue
+/* prdelsysset */
+#ifdef prdelsysset
+#define gdb_prdelsysset prdelsysset
+#else
+#define gdb_prdelsysset prdelset
#endif
+/* prissyssetmember */
+#ifdef prissyssetmember
+#define gdb_pr_issyssetmember prissyssetmember
+#else
+#define gdb_pr_issyssetmember prismember
+#endif
+
+/* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't
+ as intuitively descriptive as it could be, so we'll define
+ DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of
+ this writing, this feature is only found on AIX5 systems and
+ basically means that the set of syscalls is not fixed. I.e,
+ there's no nice table that one can #include to get all of the
+ syscall numbers. Instead, they're stored in /proc/PID/sysent
+ for each process. We are at least guaranteed that they won't
+ change over the lifetime of the process. But each process could
+ (in theory) have different syscall numbers.
+*/
+#ifdef HAVE_PRSYSENT_T
+#define DYNAMIC_SYSCALLS
+#endif
+
+
+
+/* =================== STRUCT PROCINFO "MODULE" =================== */
+
+ /* FIXME: this comment will soon be out of date W.R.T. threads. */
+
+/* The procinfo struct is a wrapper to hold all the state information
+ concerning a /proc process. There should be exactly one procinfo
+ for each process, and since GDB currently can debug only one
+ process at a time, that means there should be only one procinfo.
+ All of the LWP's of a process can be accessed indirectly thru the
+ single process procinfo.
+
+ However, against the day when GDB may debug more than one process,
+ this data structure is kept in a list (which for now will hold no
+ more than one member), and many functions will have a pointer to a
+ procinfo as an argument.
+
+ There will be a separate procinfo structure for use by the (not yet
+ implemented) "info proc" command, so that we can print useful
+ information about any random process without interfering with the
+ inferior's procinfo information. */
+
+#ifdef NEW_PROC_API
+/* format strings for /proc paths */
+# ifndef CTL_PROC_NAME_FMT
+# define MAIN_PROC_NAME_FMT "/proc/%d"
+# define CTL_PROC_NAME_FMT "/proc/%d/ctl"
+# define AS_PROC_NAME_FMT "/proc/%d/as"
+# define MAP_PROC_NAME_FMT "/proc/%d/map"
+# define STATUS_PROC_NAME_FMT "/proc/%d/status"
+# define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus")
+# endif
+/* the name of the proc status struct depends on the implementation */
+typedef pstatus_t gdb_prstatus_t;
+typedef lwpstatus_t gdb_lwpstatus_t;
+#else /* ! NEW_PROC_API */
+/* format strings for /proc paths */
+# ifndef CTL_PROC_NAME_FMT
+# define MAIN_PROC_NAME_FMT "/proc/%05d"
+# define CTL_PROC_NAME_FMT "/proc/%05d"
+# define AS_PROC_NAME_FMT "/proc/%05d"
+# define MAP_PROC_NAME_FMT "/proc/%05d"
+# define STATUS_PROC_NAME_FMT "/proc/%05d"
+# define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp")
+# endif
/* the name of the proc status struct depends on the implementation */
-/* Wrap Light Weight Process member in THE_PR_LWP macro for clearer code */
-#ifndef HAVE_PSTATUS_T
typedef prstatus_t gdb_prstatus_t;
-#define THE_PR_LWP(a) a
-#else /* HAVE_PSTATUS_T */
-typedef pstatus_t gdb_prstatus_t;
-#define THE_PR_LWP(a) a.pr_lwp
-#if !defined(HAVE_PRRUN_T) && defined(HAVE_MULTIPLE_PROC_FDS)
- /* Fallback definitions - for using configure information directly */
-#ifndef UNIXWARE
-#define UNIXWARE 1
-#endif
-#if !defined(PROCFS_USE_READ_WRITE) && !defined(HAVE_PROCFS_PIOCSET)
-#define PROCFS_USE_READ_WRITE 1
-#endif
-#endif /* !HAVE_PRRUN_T && HAVE_MULTIPLE_PROC_FDS */
-#endif /* HAVE_PSTATUS_T */
+typedef prstatus_t gdb_lwpstatus_t;
+#endif /* NEW_PROC_API */
+
+typedef struct procinfo {
+ struct procinfo *next;
+ int pid; /* Process ID */
+ int tid; /* Thread/LWP id */
+
+ /* process state */
+ int was_stopped;
+ int ignore_next_sigstop;
+
+ /* The following four fd fields may be identical, or may contain
+ several different fd's, depending on the version of /proc
+ (old ioctl or new read/write). */
+
+ int ctl_fd; /* File descriptor for /proc control file */
+ /*
+ * The next three file descriptors are actually only needed in the
+ * read/write, multiple-file-descriptor implemenation (NEW_PROC_API).
+ * However, to avoid a bunch of #ifdefs in the code, we will use
+ * them uniformly by (in the case of the ioctl single-file-descriptor
+ * implementation) filling them with copies of the control fd.
+ */
+ int status_fd; /* File descriptor for /proc status file */
+ int as_fd; /* File descriptor for /proc as file */
+
+ char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */
+
+ fltset_t saved_fltset; /* Saved traced hardware fault set */
+ gdb_sigset_t saved_sigset; /* Saved traced signal set */
+ gdb_sigset_t saved_sighold; /* Saved held signal set */
+ sysset_t *saved_exitset; /* Saved traced system call exit set */
+ sysset_t *saved_entryset; /* Saved traced system call entry set */
+
+ gdb_prstatus_t prstatus; /* Current process status info */
+
+#ifndef NEW_PROC_API
+ gdb_fpregset_t fpregset; /* Current floating point registers */
+#endif
+
+#ifdef DYNAMIC_SYSCALLS
+ int num_syscalls; /* Total number of syscalls */
+ char **syscall_names; /* Syscall number to name map */
+#endif
+
+ struct procinfo *thread_list;
+
+ int status_valid : 1;
+ int gregs_valid : 1;
+ int fpregs_valid : 1;
+ int threads_valid: 1;
+} procinfo;
+
+static char errmsg[128]; /* shared error msg buffer */
+
+/* Function prototypes for procinfo module: */
+
+static procinfo *find_procinfo_or_die (int pid, int tid);
+static procinfo *find_procinfo (int pid, int tid);
+static procinfo *create_procinfo (int pid, int tid);
+static void destroy_procinfo (procinfo * p);
+static void do_destroy_procinfo_cleanup (void *);
+static void dead_procinfo (procinfo * p, char *msg, int killp);
+static int open_procinfo_files (procinfo * p, int which);
+static void close_procinfo_files (procinfo * p);
+static int sysset_t_size (procinfo *p);
+static sysset_t *sysset_t_alloc (procinfo * pi);
+#ifdef DYNAMIC_SYSCALLS
+static void load_syscalls (procinfo *pi);
+static void free_syscalls (procinfo *pi);
+static int find_syscall (procinfo *pi, char *name);
+#endif /* DYNAMIC_SYSCALLS */
+
+/* The head of the procinfo list: */
+static procinfo * procinfo_list;
-#define MAX_SYSCALLS 256 /* Maximum number of syscalls for table */
+/*
+ * Function: find_procinfo
+ *
+ * Search the procinfo list.
+ *
+ * Returns: pointer to procinfo, or NULL if not found.
+ */
-/* proc name formats may vary depending on the proc implementation */
-#ifdef HAVE_MULTIPLE_PROC_FDS
-#ifndef CTL_PROC_NAME_FMT
-#define CTL_PROC_NAME_FMT "/proc/%d/ctl"
-#define AS_PROC_NAME_FMT "/proc/%d/as"
-#define MAP_PROC_NAME_FMT "/proc/%d/map"
-#define STATUS_PROC_NAME_FMT "/proc/%d/status"
-#endif
-#else /* HAVE_MULTIPLE_PROC_FDS */
-#ifndef CTL_PROC_NAME_FMT
-#define CTL_PROC_NAME_FMT "/proc/%05d"
-#define AS_PROC_NAME_FMT "/proc/%05d"
-#define MAP_PROC_NAME_FMT "/proc/%05d"
-#define STATUS_PROC_NAME_FMT "/proc/%05d"
-#endif
-#endif /* HAVE_MULTIPLE_PROC_FDS */
+static procinfo *
+find_procinfo (int pid, int tid)
+{
+ procinfo *pi;
+ for (pi = procinfo_list; pi; pi = pi->next)
+ if (pi->pid == pid)
+ break;
-/* These #ifdefs are for sol2.x in particular. sol2.x has
- both a "gregset_t" and a "prgregset_t", which have
- similar uses but different layouts. sol2.x gdb tries to
- use prgregset_t (and prfpregset_t) everywhere. */
+ if (pi)
+ if (tid)
+ {
+ /* Don't check threads_valid. If we're updating the
+ thread_list, we want to find whatever threads are already
+ here. This means that in general it is the caller's
+ responsibility to check threads_valid and update before
+ calling find_procinfo, if the caller wants to find a new
+ thread. */
+
+ for (pi = pi->thread_list; pi; pi = pi->next)
+ if (pi->tid == tid)
+ break;
+ }
-#ifdef GDB_GREGSET_TYPE
-typedef GDB_GREGSET_TYPE gdb_gregset_t;
-#else
-typedef gregset_t gdb_gregset_t;
-#endif
+ return pi;
+}
-#ifdef GDB_FPREGSET_TYPE
-typedef GDB_FPREGSET_TYPE gdb_fpregset_t;
-#else
-typedef fpregset_t gdb_fpregset_t;
-#endif
+/*
+ * Function: find_procinfo_or_die
+ *
+ * Calls find_procinfo, but errors on failure.
+ */
+static procinfo *
+find_procinfo_or_die (int pid, int tid)
+{
+ procinfo *pi = find_procinfo (pid, tid);
-#define MAX_PROC_NAME_SIZE sizeof("/proc/1234567890/status")
+ if (pi == NULL)
+ {
+ if (tid)
+ error (_("procfs: couldn't find pid %d (kernel thread %d) in procinfo list."),
+ pid, tid);
+ else
+ error (_("procfs: couldn't find pid %d in procinfo list."), pid);
+ }
+ return pi;
+}
-struct target_ops procfs_ops;
+/* open_with_retry() is a wrapper for open(). The appropriate
+ open() call is attempted; if unsuccessful, it will be retried as
+ many times as needed for the EAGAIN and EINTR conditions.
-int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to
- be a runnable target. Used by targets
- that can sit atop procfs, such as solaris
- thread support. */
+ For other conditions, open_with_retry() will retry the open() a
+ limited number of times. In addition, a short sleep is imposed
+ prior to retrying the open(). The reason for this sleep is to give
+ the kernel a chance to catch up and create the file in question in
+ the event that GDB "wins" the race to open a file before the kernel
+ has created it. */
-#if 1 /* FIXME: Gross and ugly hack to resolve coredep.c global */
-CORE_ADDR kernel_u_addr;
-#endif
+static int
+open_with_retry (const char *pathname, int flags)
+{
+ int retries_remaining, status;
-#ifdef BROKEN_SIGINFO_H /* Workaround broken SGS <sys/siginfo.h> */
-#undef si_pid
-#define si_pid _data._proc.pid
-#undef si_uid
-#define si_uid _data._proc._pdata._kill.uid
-#endif /* BROKEN_SIGINFO_H */
+ retries_remaining = 2;
-/* Define structures for passing commands to /proc/pid/ctl file. Note that
- while we create these for the PROCFS_USE_READ_WRITE world, we use them
- and ignore the extra cmd int in other proc schemes.
- */
-/* generic ctl msg */
-struct proc_ctl
- {
- int cmd;
- long data;
- };
+ while (1)
+ {
+ status = open (pathname, flags);
-/* set general registers */
-struct greg_ctl
- {
- int cmd;
- gdb_gregset_t gregset;
- };
+ if (status >= 0 || retries_remaining == 0)
+ break;
+ else if (errno != EINTR && errno != EAGAIN)
+ {
+ retries_remaining--;
+ sleep (1);
+ }
+ }
-/* set fp registers */
-struct fpreg_ctl
- {
- int cmd;
- gdb_fpregset_t fpregset;
- };
+ return status;
+}
-/* set signals to be traced */
-struct sig_ctl
- {
- int cmd;
- sigset_t sigset;
- };
+/*
+ * Function: open_procinfo_files
+ *
+ * Open the file descriptor for the process or LWP.
+ * ifdef NEW_PROC_API, we only open the control file descriptor;
+ * the others are opened lazily as needed.
+ * else (if not NEW_PROC_API), there is only one real
+ * file descriptor, but we keep multiple copies of it so that
+ * the code that uses them does not have to be #ifdef'd.
+ *
+ * Return: file descriptor, or zero for failure.
+ */
-/* set faults to be traced */
-struct flt_ctl
- {
- int cmd;
- fltset_t fltset;
- };
+enum { FD_CTL, FD_STATUS, FD_AS };
-/* set system calls to be traced */
-struct sys_ctl
- {
- int cmd;
- sysset_t sysset;
- };
+static int
+open_procinfo_files (procinfo *pi, int which)
+{
+#ifdef NEW_PROC_API
+ char tmp[MAX_PROC_NAME_SIZE];
+#endif
+ int fd;
+
+ /*
+ * This function is getting ALMOST long enough to break up into several.
+ * Here is some rationale:
+ *
+ * NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware):
+ * There are several file descriptors that may need to be open
+ * for any given process or LWP. The ones we're intereted in are:
+ * - control (ctl) write-only change the state
+ * - status (status) read-only query the state
+ * - address space (as) read/write access memory
+ * - map (map) read-only virtual addr map
+ * Most of these are opened lazily as they are needed.
+ * The pathnames for the 'files' for an LWP look slightly
+ * different from those of a first-class process:
+ * Pathnames for a process (<proc-id>):
+ * /proc/<proc-id>/ctl
+ * /proc/<proc-id>/status
+ * /proc/<proc-id>/as
+ * /proc/<proc-id>/map
+ * Pathnames for an LWP (lwp-id):
+ * /proc/<proc-id>/lwp/<lwp-id>/lwpctl
+ * /proc/<proc-id>/lwp/<lwp-id>/lwpstatus
+ * An LWP has no map or address space file descriptor, since
+ * the memory map and address space are shared by all LWPs.
+ *
+ * Everyone else (Solaris 2.5, Irix, OSF)
+ * There is only one file descriptor for each process or LWP.
+ * For convenience, we copy the same file descriptor into all
+ * three fields of the procinfo struct (ctl_fd, status_fd, and
+ * as_fd, see NEW_PROC_API above) so that code that uses them
+ * doesn't need any #ifdef's.
+ * Pathname for all:
+ * /proc/<proc-id>
+ *
+ * Solaris 2.5 LWP's:
+ * Each LWP has an independent file descriptor, but these
+ * are not obtained via the 'open' system call like the rest:
+ * instead, they're obtained thru an ioctl call (PIOCOPENLWP)
+ * to the file descriptor of the parent process.
+ *
+ * OSF threads:
+ * These do not even have their own independent file descriptor.
+ * All operations are carried out on the file descriptor of the
+ * parent process. Therefore we just call open again for each
+ * thread, getting a new handle for the same 'file'.
+ */
+
+#ifdef NEW_PROC_API
+ /*
+ * In this case, there are several different file descriptors that
+ * we might be asked to open. The control file descriptor will be
+ * opened early, but the others will be opened lazily as they are
+ * needed.
+ */
+
+ strcpy (tmp, pi->pathname);
+ switch (which) { /* which file descriptor to open? */
+ case FD_CTL:
+ if (pi->tid)
+ strcat (tmp, "/lwpctl");
+ else
+ strcat (tmp, "/ctl");
+ fd = open_with_retry (tmp, O_WRONLY);
+ if (fd <= 0)
+ return 0; /* fail */
+ pi->ctl_fd = fd;
+ break;
+ case FD_AS:
+ if (pi->tid)
+ return 0; /* there is no 'as' file descriptor for an lwp */
+ strcat (tmp, "/as");
+ fd = open_with_retry (tmp, O_RDWR);
+ if (fd <= 0)
+ return 0; /* fail */
+ pi->as_fd = fd;
+ break;
+ case FD_STATUS:
+ if (pi->tid)
+ strcat (tmp, "/lwpstatus");
+ else
+ strcat (tmp, "/status");
+ fd = open_with_retry (tmp, O_RDONLY);
+ if (fd <= 0)
+ return 0; /* fail */
+ pi->status_fd = fd;
+ break;
+ default:
+ return 0; /* unknown file descriptor */
+ }
+#else /* not NEW_PROC_API */
+ /*
+ * In this case, there is only one file descriptor for each procinfo
+ * (ie. each process or LWP). In fact, only the file descriptor for
+ * the process can actually be opened by an 'open' system call.
+ * The ones for the LWPs have to be obtained thru an IOCTL call
+ * on the process's file descriptor.
+ *
+ * For convenience, we copy each procinfo's single file descriptor
+ * into all of the fields occupied by the several file descriptors
+ * of the NEW_PROC_API implementation. That way, the code that uses
+ * them can be written without ifdefs.
+ */
+
+
+#ifdef PIOCTSTATUS /* OSF */
+ /* Only one FD; just open it. */
+ if ((fd = open_with_retry (pi->pathname, O_RDWR)) == 0)
+ return 0;
+#else /* Sol 2.5, Irix, other? */
+ if (pi->tid == 0) /* Master procinfo for the process */
+ {
+ fd = open_with_retry (pi->pathname, O_RDWR);
+ if (fd <= 0)
+ return 0; /* fail */
+ }
+ else /* LWP thread procinfo */
+ {
+#ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */
+ procinfo *process;
+ int lwpid = pi->tid;
+
+ /* Find the procinfo for the entire process. */
+ if ((process = find_procinfo (pi->pid, 0)) == NULL)
+ return 0; /* fail */
+
+ /* Now obtain the file descriptor for the LWP. */
+ if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) <= 0)
+ return 0; /* fail */
+#else /* Irix, other? */
+ return 0; /* Don't know how to open threads */
+#endif /* Sol 2.5 PIOCOPENLWP */
+ }
+#endif /* OSF PIOCTSTATUS */
+ pi->ctl_fd = pi->as_fd = pi->status_fd = fd;
+#endif /* NEW_PROC_API */
-/* set current signal to be traced */
-struct sigi_ctl
- {
- int cmd;
- siginfo_t siginfo;
- };
-
-/* All access to the inferior, either one started by gdb or one that has
- been attached to, is controlled by an instance of a procinfo structure,
- defined below. Since gdb currently only handles one inferior at a time,
- the procinfo structure for the inferior is statically allocated and
- only one exists at any given time. There is a separate procinfo
- structure for use by the "info proc" command, so that we can print
- useful information about any random process without interfering with
- the inferior's procinfo information. */
-
-struct procinfo
- {
- struct procinfo *next;
- int pid; /* Process ID of inferior */
- int ctl_fd; /* File descriptor for /proc ctl file */
- int status_fd; /* File descriptor for /proc status file */
- int as_fd; /* File descriptor for /proc as file */
- int map_fd; /* File descriptor for /proc map file */
- char *pathname; /* Pathname to /proc entry */
- int had_event; /* poll/select says something happened */
- int was_stopped; /* Nonzero if was stopped prior to attach */
- int nopass_next_sigstop; /* Don't pass a sigstop on next resume */
-#ifdef HAVE_PRRUN_T
- prrun_t prrun; /* Control state when it is run */
-#endif
- gdb_prstatus_t prstatus; /* Current process status info */
- struct greg_ctl gregset; /* General register set */
- struct fpreg_ctl fpregset; /* Floating point register set */
- struct flt_ctl fltset; /* Current traced hardware fault set */
- struct sig_ctl trace; /* Current traced signal set */
- struct sys_ctl exitset; /* Current traced system call exit set */
- struct sys_ctl entryset; /* Current traced system call entry set */
- struct sig_ctl saved_sighold; /* Saved held signal set */
- struct flt_ctl saved_fltset; /* Saved traced hardware fault set */
- struct sig_ctl saved_trace; /* Saved traced signal set */
- struct sys_ctl saved_exitset; /* Saved traced system call exit set */
- struct sys_ctl saved_entryset; /* Saved traced system call entry set */
- int num_syscall_handlers; /* Number of syscall trap handlers
- currently installed */
- /* Pointer to list of syscall trap handlers */
- struct procfs_syscall_handler *syscall_handlers;
- int saved_rtnval; /* return value and status for wait(), */
- int saved_statval; /* as supplied by a syscall handler. */
- int new_child; /* Non-zero if it's a new thread */
- };
-
-/* List of inferior process information */
-static struct procinfo *procinfo_list = NULL;
-static struct pollfd *poll_list; /* pollfds used for waiting on /proc */
-
-static int num_poll_list = 0; /* Number of entries in poll_list */
-
-/* Much of the information used in the /proc interface, particularly for
- printing status information, is kept as tables of structures of the
- following form. These tables can be used to map numeric values to
- their symbolic names and to a string that describes their specific use. */
-
-struct trans
- {
- int value; /* The numeric value */
- char *name; /* The equivalent symbolic value */
- char *desc; /* Short description of value */
- };
+ return 1; /* success */
+}
-/* Translate bits in the pr_flags member of the prstatus structure, into the
- names and desc information. */
+/*
+ * Function: create_procinfo
+ *
+ * Allocate a data structure and link it into the procinfo list.
+ * (First tries to find a pre-existing one (FIXME: why?)
+ *
+ * Return: pointer to new procinfo struct.
+ */
-static struct trans pr_flag_table[] =
+static procinfo *
+create_procinfo (int pid, int tid)
{
-#if defined (PR_STOPPED)
- {PR_STOPPED, "PR_STOPPED", "Process is stopped"},
-#endif
-#if defined (PR_ISTOP)
- {PR_ISTOP, "PR_ISTOP", "Stopped on an event of interest"},
-#endif
-#if defined (PR_DSTOP)
- {PR_DSTOP, "PR_DSTOP", "A stop directive is in effect"},
-#endif
-#if defined (PR_ASLEEP)
- {PR_ASLEEP, "PR_ASLEEP", "Sleeping in an interruptible system call"},
-#endif
-#if defined (PR_FORK)
- {PR_FORK, "PR_FORK", "Inherit-on-fork is in effect"},
-#endif
-#if defined (PR_RLC)
- {PR_RLC, "PR_RLC", "Run-on-last-close is in effect"},
-#endif
-#if defined (PR_PTRACE)
- {PR_PTRACE, "PR_PTRACE", "Process is being controlled by ptrace"},
-#endif
-#if defined (PR_PCINVAL)
- {PR_PCINVAL, "PR_PCINVAL", "PC refers to an invalid virtual address"},
-#endif
-#if defined (PR_ISSYS)
- {PR_ISSYS, "PR_ISSYS", "Is a system process"},
-#endif
-#if defined (PR_STEP)
- {PR_STEP, "PR_STEP", "Process has single step pending"},
-#endif
-#if defined (PR_KLC)
- {PR_KLC, "PR_KLC", "Kill-on-last-close is in effect"},
-#endif
-#if defined (PR_ASYNC)
- {PR_ASYNC, "PR_ASYNC", "Asynchronous stop is in effect"},
-#endif
-#if defined (PR_PCOMPAT)
- {PR_PCOMPAT, "PR_PCOMPAT", "Ptrace compatibility mode in effect"},
-#endif
-#if defined (PR_MSACCT)
- {PR_MSACCT, "PR_MSACCT", "Microstate accounting enabled"},
-#endif
-#if defined (PR_BPTADJ)
- {PR_BPTADJ, "PR_BPTADJ", "Breakpoint PC adjustment in effect"},
+ procinfo *pi, *parent;
+
+ if ((pi = find_procinfo (pid, tid)))
+ return pi; /* Already exists, nothing to do. */
+
+ /* find parent before doing malloc, to save having to cleanup */
+ if (tid != 0)
+ parent = find_procinfo_or_die (pid, 0); /* FIXME: should I
+ create it if it
+ doesn't exist yet? */
+
+ pi = (procinfo *) xmalloc (sizeof (procinfo));
+ memset (pi, 0, sizeof (procinfo));
+ pi->pid = pid;
+ pi->tid = tid;
+
+#ifdef DYNAMIC_SYSCALLS
+ load_syscalls (pi);
#endif
-#if defined (PR_ASLWP)
- {PR_ASLWP, "PR_ASLWP", "Asynchronus signal LWP"},
+
+ pi->saved_entryset = sysset_t_alloc (pi);
+ pi->saved_exitset = sysset_t_alloc (pi);
+
+ /* Chain into list. */
+ if (tid == 0)
+ {
+ sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid);
+ pi->next = procinfo_list;
+ procinfo_list = pi;
+ }
+ else
+ {
+#ifdef NEW_PROC_API
+ sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid);
+#else
+ sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid);
#endif
- {0, NULL, NULL}
-};
+ pi->next = parent->thread_list;
+ parent->thread_list = pi;
+ }
+ return pi;
+}
-/* Translate values in the pr_why field of the prstatus struct. */
+/*
+ * Function: close_procinfo_files
+ *
+ * Close all file descriptors associated with the procinfo
+ */
-static struct trans pr_why_table[] =
+static void
+close_procinfo_files (procinfo *pi)
{
-#if defined (PR_REQUESTED)
- {PR_REQUESTED, "PR_REQUESTED", "Directed to stop via PIOCSTOP/PIOCWSTOP"},
-#endif
-#if defined (PR_SIGNALLED)
- {PR_SIGNALLED, "PR_SIGNALLED", "Receipt of a traced signal"},
-#endif
-#if defined (PR_SYSENTRY)
- {PR_SYSENTRY, "PR_SYSENTRY", "Entry to a traced system call"},
-#endif
-#if defined (PR_SYSEXIT)
- {PR_SYSEXIT, "PR_SYSEXIT", "Exit from a traced system call"},
-#endif
-#if defined (PR_JOBCONTROL)
- {PR_JOBCONTROL, "PR_JOBCONTROL", "Default job control stop signal action"},
-#endif
-#if defined (PR_FAULTED)
- {PR_FAULTED, "PR_FAULTED", "Incurred a traced hardware fault"},
-#endif
-#if defined (PR_SUSPENDED)
- {PR_SUSPENDED, "PR_SUSPENDED", "Process suspended"},
-#endif
-#if defined (PR_CHECKPOINT)
- {PR_CHECKPOINT, "PR_CHECKPOINT", "(???)"},
-#endif
- {0, NULL, NULL}
-};
+ if (pi->ctl_fd > 0)
+ close (pi->ctl_fd);
+#ifdef NEW_PROC_API
+ if (pi->as_fd > 0)
+ close (pi->as_fd);
+ if (pi->status_fd > 0)
+ close (pi->status_fd);
+#endif
+ pi->ctl_fd = pi->as_fd = pi->status_fd = 0;
+}
-/* Hardware fault translation table. */
+/*
+ * Function: destroy_procinfo
+ *
+ * Destructor function. Close, unlink and deallocate the object.
+ */
-static struct trans faults_table[] =
+static void
+destroy_one_procinfo (procinfo **list, procinfo *pi)
{
-#if defined (FLTILL)
- {FLTILL, "FLTILL", "Illegal instruction"},
-#endif
-#if defined (FLTPRIV)
- {FLTPRIV, "FLTPRIV", "Privileged instruction"},
-#endif
-#if defined (FLTBPT)
- {FLTBPT, "FLTBPT", "Breakpoint trap"},
-#endif
-#if defined (FLTTRACE)
- {FLTTRACE, "FLTTRACE", "Trace trap"},
-#endif
-#if defined (FLTACCESS)
- {FLTACCESS, "FLTACCESS", "Memory access fault"},
-#endif
-#if defined (FLTBOUNDS)
- {FLTBOUNDS, "FLTBOUNDS", "Memory bounds violation"},
-#endif
-#if defined (FLTIOVF)
- {FLTIOVF, "FLTIOVF", "Integer overflow"},
-#endif
-#if defined (FLTIZDIV)
- {FLTIZDIV, "FLTIZDIV", "Integer zero divide"},
-#endif
-#if defined (FLTFPE)
- {FLTFPE, "FLTFPE", "Floating-point exception"},
-#endif
-#if defined (FLTSTACK)
- {FLTSTACK, "FLTSTACK", "Unrecoverable stack fault"},
-#endif
-#if defined (FLTPAGE)
- {FLTPAGE, "FLTPAGE", "Recoverable page fault"},
+ procinfo *ptr;
+
+ /* Step one: unlink the procinfo from its list */
+ if (pi == *list)
+ *list = pi->next;
+ else
+ for (ptr = *list; ptr; ptr = ptr->next)
+ if (ptr->next == pi)
+ {
+ ptr->next = pi->next;
+ break;
+ }
+
+ /* Step two: close any open file descriptors */
+ close_procinfo_files (pi);
+
+ /* Step three: free the memory. */
+#ifdef DYNAMIC_SYSCALLS
+ free_syscalls (pi);
#endif
- {0, NULL, NULL}
-};
+ xfree (pi->saved_entryset);
+ xfree (pi->saved_exitset);
+ xfree (pi);
+}
-/* Translation table for signal generation information. See UNIX System
- V Release 4 Programmer's Reference Manual, siginfo(5). */
+static void
+destroy_procinfo (procinfo *pi)
+{
+ procinfo *tmp;
-static struct sigcode
- {
- int signo;
- int code;
- char *codename;
- char *desc;
- }
-siginfo_table[] =
+ if (pi->tid != 0) /* destroy a thread procinfo */
+ {
+ tmp = find_procinfo (pi->pid, 0); /* find the parent process */
+ destroy_one_procinfo (&tmp->thread_list, pi);
+ }
+ else /* destroy a process procinfo and all its threads */
+ {
+ /* First destroy the children, if any; */
+ while (pi->thread_list != NULL)
+ destroy_one_procinfo (&pi->thread_list, pi->thread_list);
+ /* Then destroy the parent. Genocide!!! */
+ destroy_one_procinfo (&procinfo_list, pi);
+ }
+}
+
+static void
+do_destroy_procinfo_cleanup (void *pi)
{
-#if defined (SIGILL) && defined (ILL_ILLOPC)
- {
- SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode"
- }
- ,
-#endif
-#if defined (SIGILL) && defined (ILL_ILLOPN)
- {
- SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand",
- }
- ,
-#endif
-#if defined (SIGILL) && defined (ILL_ILLADR)
- {
- SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode"
- }
- ,
-#endif
-#if defined (SIGILL) && defined (ILL_ILLTRP)
- {
- SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap"
- }
- ,
-#endif
-#if defined (SIGILL) && defined (ILL_PRVOPC)
- {
- SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode"
- }
- ,
-#endif
-#if defined (SIGILL) && defined (ILL_PRVREG)
- {
- SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register"
- }
- ,
-#endif
-#if defined (SIGILL) && defined (ILL_COPROC)
- {
- SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error"
- }
- ,
-#endif
-#if defined (SIGILL) && defined (ILL_BADSTK)
- {
- SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error"
- }
- ,
-#endif
-#if defined (SIGFPE) && defined (FPE_INTDIV)
- {
- SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero"
- }
- ,
-#endif
-#if defined (SIGFPE) && defined (FPE_INTOVF)
- {
- SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow"
- }
- ,
-#endif
-#if defined (SIGFPE) && defined (FPE_FLTDIV)
- {
- SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating point divide by zero"
- }
- ,
-#endif
-#if defined (SIGFPE) && defined (FPE_FLTOVF)
- {
- SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating point overflow"
- }
- ,
-#endif
-#if defined (SIGFPE) && defined (FPE_FLTUND)
- {
- SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating point underflow"
- }
- ,
-#endif
-#if defined (SIGFPE) && defined (FPE_FLTRES)
- {
- SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating point inexact result"
- }
- ,
+ destroy_procinfo (pi);
+}
+
+enum { NOKILL, KILL };
+
+/*
+ * Function: dead_procinfo
+ *
+ * To be called on a non_recoverable error for a procinfo.
+ * Prints error messages, optionally sends a SIGKILL to the process,
+ * then destroys the data structure.
+ */
+
+static void
+dead_procinfo (procinfo *pi, char *msg, int kill_p)
+{
+ char procfile[80];
+
+ if (pi->pathname)
+ {
+ print_sys_errmsg (pi->pathname, errno);
+ }
+ else
+ {
+ sprintf (procfile, "process %d", pi->pid);
+ print_sys_errmsg (procfile, errno);
+ }
+ if (kill_p == KILL)
+ kill (pi->pid, SIGKILL);
+
+ destroy_procinfo (pi);
+ error ((msg));
+}
+
+/*
+ * Function: sysset_t_size
+ *
+ * Returns the (complete) size of a sysset_t struct. Normally, this
+ * is just sizeof (syset_t), but in the case of Monterey/64, the actual
+ * size of sysset_t isn't known until runtime.
+ */
+
+static int
+sysset_t_size (procinfo * pi)
+{
+#ifndef DYNAMIC_SYSCALLS
+ return sizeof (sysset_t);
+#else
+ return sizeof (sysset_t) - sizeof (uint64_t)
+ + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1))
+ / (8 * sizeof (uint64_t)));
#endif
-#if defined (SIGFPE) && defined (FPE_FLTINV)
- {
- SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating point operation"
- }
- ,
-#endif
-#if defined (SIGFPE) && defined (FPE_FLTSUB)
- {
- SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range"
- }
- ,
-#endif
-#if defined (SIGSEGV) && defined (SEGV_MAPERR)
- {
- SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object"
- }
- ,
-#endif
-#if defined (SIGSEGV) && defined (SEGV_ACCERR)
- {
- SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for object"
- }
- ,
-#endif
-#if defined (SIGBUS) && defined (BUS_ADRALN)
- {
- SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment"
- }
- ,
-#endif
-#if defined (SIGBUS) && defined (BUS_ADRERR)
- {
- SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Non-existent physical address"
- }
- ,
-#endif
-#if defined (SIGBUS) && defined (BUS_OBJERR)
- {
- SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object specific hardware error"
- }
- ,
-#endif
-#if defined (SIGTRAP) && defined (TRAP_BRKPT)
- {
- SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint"
- }
- ,
-#endif
-#if defined (SIGTRAP) && defined (TRAP_TRACE)
- {
- SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap"
- }
- ,
-#endif
-#if defined (SIGCLD) && defined (CLD_EXITED)
- {
- SIGCLD, CLD_EXITED, "CLD_EXITED", "Child has exited"
- }
- ,
-#endif
-#if defined (SIGCLD) && defined (CLD_KILLED)
- {
- SIGCLD, CLD_KILLED, "CLD_KILLED", "Child was killed"
- }
- ,
-#endif
-#if defined (SIGCLD) && defined (CLD_DUMPED)
- {
- SIGCLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally"
- }
- ,
-#endif
-#if defined (SIGCLD) && defined (CLD_TRAPPED)
- {
- SIGCLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped"
- }
- ,
-#endif
-#if defined (SIGCLD) && defined (CLD_STOPPED)
- {
- SIGCLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped"
- }
- ,
-#endif
-#if defined (SIGCLD) && defined (CLD_CONTINUED)
- {
- SIGCLD, CLD_CONTINUED, "CLD_CONTINUED", "Stopped child had continued"
- }
- ,
-#endif
-#if defined (SIGPOLL) && defined (POLL_IN)
- {
- SIGPOLL, POLL_IN, "POLL_IN", "Input input available"
- }
- ,
-#endif
-#if defined (SIGPOLL) && defined (POLL_OUT)
- {
- SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available"
- }
- ,
-#endif
-#if defined (SIGPOLL) && defined (POLL_MSG)
- {
- SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available"
- }
- ,
-#endif
-#if defined (SIGPOLL) && defined (POLL_ERR)
- {
- SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error"
- }
- ,
-#endif
-#if defined (SIGPOLL) && defined (POLL_PRI)
- {
- SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available"
- }
- ,
-#endif
-#if defined (SIGPOLL) && defined (POLL_HUP)
- {
- SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected"
- }
- ,
-#endif
- {
- 0, 0, NULL, NULL
- }
-};
-
-static char *syscall_table[MAX_SYSCALLS];
-
-/* Prototypes for local functions */
-
-static void procfs_stop PARAMS ((void));
-
-static int procfs_thread_alive PARAMS ((int));
-
-static int procfs_can_run PARAMS ((void));
-
-static void procfs_mourn_inferior PARAMS ((void));
-
-static void procfs_fetch_registers PARAMS ((int));
-
-static int procfs_wait PARAMS ((int, struct target_waitstatus *));
-
-static void procfs_open PARAMS ((char *, int));
-
-static void procfs_files_info PARAMS ((struct target_ops *));
-
-static void procfs_prepare_to_store PARAMS ((void));
-
-static void procfs_detach PARAMS ((char *, int));
-
-static void procfs_attach PARAMS ((char *, int));
-
-static void proc_set_exec_trap PARAMS ((void));
-
-static void procfs_init_inferior PARAMS ((int));
-
-static struct procinfo *create_procinfo PARAMS ((int));
-
-static void procfs_store_registers PARAMS ((int));
-
-static int procfs_xfer_memory PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *));
-
-static void procfs_kill_inferior PARAMS ((void));
-
-static char *sigcodedesc PARAMS ((siginfo_t *));
-
-static char *sigcodename PARAMS ((siginfo_t *));
+}
-static struct procinfo *wait_fd PARAMS ((void));
+/* Function: sysset_t_alloc
-static void remove_fd PARAMS ((struct procinfo *));
+ Allocate and (partially) initialize a sysset_t struct. */
-static void add_fd PARAMS ((struct procinfo *));
+static sysset_t *
+sysset_t_alloc (procinfo * pi)
+{
+ sysset_t *ret;
+ int size = sysset_t_size (pi);
+ ret = xmalloc (size);
+#ifdef DYNAMIC_SYSCALLS
+ ret->pr_size = (pi->num_syscalls + (8 * sizeof (uint64_t) - 1))
+ / (8 * sizeof (uint64_t));
+#endif
+ return ret;
+}
-static void set_proc_siginfo PARAMS ((struct procinfo *, int));
+#ifdef DYNAMIC_SYSCALLS
-static void init_syscall_table PARAMS ((void));
+/* Function: load_syscalls
-static char *syscallname PARAMS ((int));
+ Extract syscall numbers and names from /proc/<pid>/sysent. Initialize
+ pi->num_syscalls with the number of syscalls and pi->syscall_names
+ with the names. (Certain numbers may be skipped in which case the
+ names for these numbers will be left as NULL.) */
-static char *signalname PARAMS ((int));
+#define MAX_SYSCALL_NAME_LENGTH 256
+#define MAX_SYSCALLS 65536
-static char *errnoname PARAMS ((int));
+static void
+load_syscalls (procinfo *pi)
+{
+ char pathname[MAX_PROC_NAME_SIZE];
+ int sysent_fd;
+ prsysent_t header;
+ prsyscall_t *syscalls;
+ int i, size, maxcall;
+
+ pi->num_syscalls = 0;
+ pi->syscall_names = 0;
+
+ /* Open the file descriptor for the sysent file */
+ sprintf (pathname, "/proc/%d/sysent", pi->pid);
+ sysent_fd = open_with_retry (pathname, O_RDONLY);
+ if (sysent_fd < 0)
+ {
+ error (_("load_syscalls: Can't open /proc/%d/sysent"), pi->pid);
+ }
-static int proc_address_to_fd PARAMS ((struct procinfo *, CORE_ADDR, int));
+ size = sizeof header - sizeof (prsyscall_t);
+ if (read (sysent_fd, &header, size) != size)
+ {
+ error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid);
+ }
-static int open_proc_file PARAMS ((int, struct procinfo *, int, int));
+ if (header.pr_nsyscalls == 0)
+ {
+ error (_("load_syscalls: /proc/%d/sysent contains no syscalls!"), pi->pid);
+ }
-static void close_proc_file PARAMS ((struct procinfo *));
+ size = header.pr_nsyscalls * sizeof (prsyscall_t);
+ syscalls = xmalloc (size);
-static void close_proc_file_cleanup PARAMS ((void *));
+ if (read (sysent_fd, syscalls, size) != size)
+ {
+ xfree (syscalls);
+ error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid);
+ }
-static struct cleanup *make_cleanup_close_proc_file PARAMS ((struct procinfo *));
+ /* Find maximum syscall number. This may not be the same as
+ pr_nsyscalls since that value refers to the number of entries
+ in the table. (Also, the docs indicate that some system
+ call numbers may be skipped.) */
-static void unconditionally_kill_inferior PARAMS ((struct procinfo *));
+ maxcall = syscalls[0].pr_number;
-static NORETURN void proc_init_failed
-PARAMS ((struct procinfo *, char *, int)) ATTR_NORETURN;
+ for (i = 1; i < header.pr_nsyscalls; i++)
+ if (syscalls[i].pr_number > maxcall
+ && syscalls[i].pr_nameoff > 0
+ && syscalls[i].pr_number < MAX_SYSCALLS)
+ maxcall = syscalls[i].pr_number;
- static void info_proc PARAMS ((char *, int));
+ pi->num_syscalls = maxcall+1;
+ pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *));
- static void info_proc_flags PARAMS ((struct procinfo *, int));
+ for (i = 0; i < pi->num_syscalls; i++)
+ pi->syscall_names[i] = NULL;
- static void info_proc_stop PARAMS ((struct procinfo *, int));
+ /* Read the syscall names in */
+ for (i = 0; i < header.pr_nsyscalls; i++)
+ {
+ char namebuf[MAX_SYSCALL_NAME_LENGTH];
+ int nread;
+ int callnum;
+
+ if (syscalls[i].pr_number >= MAX_SYSCALLS
+ || syscalls[i].pr_number < 0
+ || syscalls[i].pr_nameoff <= 0
+ || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET)
+ != (off_t) syscalls[i].pr_nameoff))
+ continue;
- static void info_proc_siginfo PARAMS ((struct procinfo *, int));
+ nread = read (sysent_fd, namebuf, sizeof namebuf);
+ if (nread <= 0)
+ continue;
- static void info_proc_syscalls PARAMS ((struct procinfo *, int));
+ callnum = syscalls[i].pr_number;
- static void info_proc_mappings PARAMS ((struct procinfo *, int));
+ if (pi->syscall_names[callnum] != NULL)
+ {
+ /* FIXME: Generate warning */
+ continue;
+ }
- static void info_proc_signals PARAMS ((struct procinfo *, int));
+ namebuf[nread-1] = '\0';
+ size = strlen (namebuf) + 1;
+ pi->syscall_names[callnum] = xmalloc (size);
+ strncpy (pi->syscall_names[callnum], namebuf, size-1);
+ pi->syscall_names[callnum][size-1] = '\0';
+ }
- static void info_proc_faults PARAMS ((struct procinfo *, int));
+ close (sysent_fd);
+ xfree (syscalls);
+}
- static char *mappingflags PARAMS ((long));
+/* Function: free_syscalls
- static char *lookupname PARAMS ((struct trans *, unsigned int, char *));
+ Free the space allocated for the syscall names from the procinfo
+ structure. */
- static char *lookupdesc PARAMS ((struct trans *, unsigned int));
+static void
+free_syscalls (procinfo *pi)
+{
+ if (pi->syscall_names)
+ {
+ int i;
- static int do_attach PARAMS ((int pid));
+ for (i = 0; i < pi->num_syscalls; i++)
+ if (pi->syscall_names[i] != NULL)
+ xfree (pi->syscall_names[i]);
- static void do_detach PARAMS ((int siggnal));
+ xfree (pi->syscall_names);
+ pi->syscall_names = 0;
+ }
+}
- static void procfs_create_inferior PARAMS ((char *, char *, char **));
+/* Function: find_syscall
- static void procfs_notice_signals PARAMS ((int pid));
+ Given a name, look up (and return) the corresponding syscall number.
+ If no match is found, return -1. */
- static void notice_signals PARAMS ((struct procinfo *, struct sig_ctl *));
+static int
+find_syscall (procinfo *pi, char *name)
+{
+ int i;
+ for (i = 0; i < pi->num_syscalls; i++)
+ {
+ if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0)
+ return i;
+ }
+ return -1;
+}
+#endif
- static struct procinfo *find_procinfo PARAMS ((pid_t pid, int okfail));
+/* =================== END, STRUCT PROCINFO "MODULE" =================== */
- static int procfs_write_pcwstop PARAMS ((struct procinfo *));
- static int procfs_read_status PARAMS ((struct procinfo *));
- static void procfs_write_pckill PARAMS ((struct procinfo *));
+/* =================== /proc "MODULE" =================== */
- typedef int syscall_func_t PARAMS ((struct procinfo * pi, int syscall_num,
- int why, int *rtnval, int *statval));
+/*
+ * This "module" is the interface layer between the /proc system API
+ * and the gdb target vector functions. This layer consists of
+ * access functions that encapsulate each of the basic operations
+ * that we need to use from the /proc API.
+ *
+ * The main motivation for this layer is to hide the fact that
+ * there are two very different implementations of the /proc API.
+ * Rather than have a bunch of #ifdefs all thru the gdb target vector
+ * functions, we do our best to hide them all in here.
+ */
- static void procfs_set_syscall_trap PARAMS ((struct procinfo * pi,
- int syscall_num, int flags,
- syscall_func_t * func));
+int proc_get_status (procinfo * pi);
+long proc_flags (procinfo * pi);
+int proc_why (procinfo * pi);
+int proc_what (procinfo * pi);
+int proc_set_run_on_last_close (procinfo * pi);
+int proc_unset_run_on_last_close (procinfo * pi);
+int proc_set_inherit_on_fork (procinfo * pi);
+int proc_unset_inherit_on_fork (procinfo * pi);
+int proc_set_async (procinfo * pi);
+int proc_unset_async (procinfo * pi);
+int proc_stop_process (procinfo * pi);
+int proc_trace_signal (procinfo * pi, int signo);
+int proc_ignore_signal (procinfo * pi, int signo);
+int proc_clear_current_fault (procinfo * pi);
+int proc_set_current_signal (procinfo * pi, int signo);
+int proc_clear_current_signal (procinfo * pi);
+int proc_set_gregs (procinfo * pi);
+int proc_set_fpregs (procinfo * pi);
+int proc_wait_for_stop (procinfo * pi);
+int proc_run_process (procinfo * pi, int step, int signo);
+int proc_kill (procinfo * pi, int signo);
+int proc_parent_pid (procinfo * pi);
+int proc_get_nthreads (procinfo * pi);
+int proc_get_current_thread (procinfo * pi);
+int proc_set_held_signals (procinfo * pi, gdb_sigset_t * sighold);
+int proc_set_traced_sysexit (procinfo * pi, sysset_t * sysset);
+int proc_set_traced_sysentry (procinfo * pi, sysset_t * sysset);
+int proc_set_traced_faults (procinfo * pi, fltset_t * fltset);
+int proc_set_traced_signals (procinfo * pi, gdb_sigset_t * sigset);
+
+int proc_update_threads (procinfo * pi);
+int proc_iterate_over_threads (procinfo * pi,
+ int (*func) (procinfo *, procinfo *, void *),
+ void *ptr);
+
+gdb_gregset_t *proc_get_gregs (procinfo * pi);
+gdb_fpregset_t *proc_get_fpregs (procinfo * pi);
+sysset_t *proc_get_traced_sysexit (procinfo * pi, sysset_t * save);
+sysset_t *proc_get_traced_sysentry (procinfo * pi, sysset_t * save);
+fltset_t *proc_get_traced_faults (procinfo * pi, fltset_t * save);
+gdb_sigset_t *proc_get_traced_signals (procinfo * pi, gdb_sigset_t * save);
+gdb_sigset_t *proc_get_held_signals (procinfo * pi, gdb_sigset_t * save);
+gdb_sigset_t *proc_get_pending_signals (procinfo * pi, gdb_sigset_t * save);
+gdb_sigaction_t *proc_get_signal_actions (procinfo * pi, gdb_sigaction_t *save);
+
+void proc_warn (procinfo * pi, char *func, int line);
+void proc_error (procinfo * pi, char *func, int line);
- static void procfs_clear_syscall_trap PARAMS ((struct procinfo * pi,
- int syscall_num, int errok));
+void
+proc_warn (procinfo *pi, char *func, int line)
+{
+ sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname);
+ print_sys_errmsg (errmsg, errno);
+}
-#define PROCFS_SYSCALL_ENTRY 0x1 /* Trap on entry to sys call */
-#define PROCFS_SYSCALL_EXIT 0x2 /* Trap on exit from sys call */
+void
+proc_error (procinfo *pi, char *func, int line)
+{
+ sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname);
+ perror_with_name (errmsg);
+}
- static syscall_func_t procfs_exit_handler;
+/*
+ * Function: proc_get_status
+ *
+ * Updates the status struct in the procinfo.
+ * There is a 'valid' flag, to let other functions know when
+ * this function needs to be called (so the status is only
+ * read when it is needed). The status file descriptor is
+ * also only opened when it is needed.
+ *
+ * Return: non-zero for success, zero for failure.
+ */
- static syscall_func_t procfs_exec_handler;
+int
+proc_get_status (procinfo *pi)
+{
+ /* Status file descriptor is opened "lazily" */
+ if (pi->status_fd == 0 &&
+ open_procinfo_files (pi, FD_STATUS) == 0)
+ {
+ pi->status_valid = 0;
+ return 0;
+ }
-#ifdef SYS_sproc
- static syscall_func_t procfs_sproc_handler;
- static syscall_func_t procfs_fork_handler;
+#ifdef NEW_PROC_API
+ if (lseek (pi->status_fd, 0, SEEK_SET) < 0)
+ pi->status_valid = 0; /* fail */
+ else
+ {
+ /* Sigh... I have to read a different data structure,
+ depending on whether this is a main process or an LWP. */
+ if (pi->tid)
+ pi->status_valid = (read (pi->status_fd,
+ (char *) &pi->prstatus.pr_lwp,
+ sizeof (lwpstatus_t))
+ == sizeof (lwpstatus_t));
+ else
+ {
+ pi->status_valid = (read (pi->status_fd,
+ (char *) &pi->prstatus,
+ sizeof (gdb_prstatus_t))
+ == sizeof (gdb_prstatus_t));
+#if 0 /*def UNIXWARE*/
+ if (pi->status_valid &&
+ (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) &&
+ pi->prstatus.pr_lwp.pr_why == PR_REQUESTED)
+ /* Unixware peculiarity -- read the damn thing again! */
+ pi->status_valid = (read (pi->status_fd,
+ (char *) &pi->prstatus,
+ sizeof (gdb_prstatus_t))
+ == sizeof (gdb_prstatus_t));
+#endif /* UNIXWARE */
+ }
+ }
+#else /* ioctl method */
+#ifdef PIOCTSTATUS /* osf */
+ if (pi->tid == 0) /* main process */
+ {
+ /* Just read the danged status. Now isn't that simple? */
+ pi->status_valid =
+ (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0);
+ }
+ else
+ {
+ int win;
+ struct {
+ long pr_count;
+ tid_t pr_error_thread;
+ struct prstatus status;
+ } thread_status;
+
+ thread_status.pr_count = 1;
+ thread_status.status.pr_tid = pi->tid;
+ win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0);
+ if (win)
+ {
+ memcpy (&pi->prstatus, &thread_status.status,
+ sizeof (pi->prstatus));
+ pi->status_valid = 1;
+ }
+ }
+#else
+ /* Just read the danged status. Now isn't that simple? */
+ pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0);
#endif
-
-#ifdef SYS_lwp_create
- static syscall_func_t procfs_lwp_creation_handler;
#endif
- static void modify_inherit_on_fork_flag PARAMS ((int fd, int flag));
- static void modify_run_on_last_close_flag PARAMS ((int fd, int flag));
-
-/* */
-
- struct procfs_syscall_handler
- {
- int syscall_num; /* The number of the system call being handled */
- /* The function to be called */
- syscall_func_t *func;
- };
-
- static void procfs_resume PARAMS ((int pid, int step,
- enum target_signal signo));
-
- static void init_procfs_ops PARAMS ((void));
-
-/* External function prototypes that can't be easily included in any
- header file because the args are typedefs in system include files. */
-
- extern void supply_gregset PARAMS ((gdb_gregset_t *));
-
- extern void fill_gregset PARAMS ((gdb_gregset_t *, int));
-
-#ifdef FP0_REGNUM
- extern void supply_fpregset PARAMS ((gdb_fpregset_t *));
+ if (pi->status_valid)
+ {
+ PROC_PRETTYFPRINT_STATUS (proc_flags (pi),
+ proc_why (pi),
+ proc_what (pi),
+ proc_get_current_thread (pi));
+ }
- extern void fill_fpregset PARAMS ((gdb_fpregset_t *, int));
+ /* The status struct includes general regs, so mark them valid too */
+ pi->gregs_valid = pi->status_valid;
+#ifdef NEW_PROC_API
+ /* In the read/write multiple-fd model,
+ the status struct includes the fp regs too, so mark them valid too */
+ pi->fpregs_valid = pi->status_valid;
#endif
+ return pi->status_valid; /* True if success, false if failure. */
+}
/*
-
- LOCAL FUNCTION
-
- find_procinfo -- convert a process id to a struct procinfo
-
- SYNOPSIS
-
- static struct procinfo * find_procinfo (pid_t pid, int okfail);
-
- DESCRIPTION
-
- Given a process id, look it up in the procinfo chain. Returns
- a struct procinfo *. If can't find pid, then call error(),
- unless okfail is set, in which case, return NULL;
+ * Function: proc_flags
+ *
+ * returns the process flags (pr_flags field).
*/
- static struct procinfo *
- find_procinfo (pid, okfail)
- pid_t pid;
- int okfail;
+long
+proc_flags (procinfo *pi)
{
- struct procinfo *procinfo;
-
- for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
- if (procinfo->pid == pid)
- return procinfo;
-
- if (okfail)
- return NULL;
-
- error ("procfs (find_procinfo): Couldn't locate pid %d", pid);
+ if (!pi->status_valid)
+ if (!proc_get_status (pi))
+ return 0; /* FIXME: not a good failure value (but what is?) */
+
+#ifdef NEW_PROC_API
+# ifdef UNIXWARE
+ /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in
+ pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t.
+ The two sets of flags don't overlap. */
+ return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags;
+# else
+ return pi->prstatus.pr_lwp.pr_flags;
+# endif
+#else
+ return pi->prstatus.pr_flags;
+#endif
}
/*
-
- LOCAL MACRO
-
- current_procinfo -- convert inferior_pid to a struct procinfo
-
- SYNOPSIS
-
- static struct procinfo * current_procinfo;
-
- DESCRIPTION
-
- Looks up inferior_pid in the procinfo chain. Always returns a
- struct procinfo *. If process can't be found, we error() out.
+ * Function: proc_why
+ *
+ * returns the pr_why field (why the process stopped).
*/
-#define current_procinfo find_procinfo (inferior_pid, 0)
-
-/*
-
- LOCAL FUNCTION
-
- add_fd -- Add the fd to the poll/select list
-
- SYNOPSIS
-
- static void add_fd (struct procinfo *);
+int
+proc_why (procinfo *pi)
+{
+ if (!pi->status_valid)
+ if (!proc_get_status (pi))
+ return 0; /* FIXME: not a good failure value (but what is?) */
- DESCRIPTION
+#ifdef NEW_PROC_API
+ return pi->prstatus.pr_lwp.pr_why;
+#else
+ return pi->prstatus.pr_why;
+#endif
+}
- Add the fd of the supplied procinfo to the list of fds used for
- poll/select operations.
+/*
+ * Function: proc_what
+ *
+ * returns the pr_what field (details of why the process stopped).
*/
-static void
-add_fd (pi)
- struct procinfo *pi;
+int
+proc_what (procinfo *pi)
{
- if (num_poll_list <= 0)
- poll_list = (struct pollfd *) xmalloc (sizeof (struct pollfd));
- else
- poll_list = (struct pollfd *) xrealloc (poll_list,
- (num_poll_list + 1)
- * sizeof (struct pollfd));
- poll_list[num_poll_list].fd = pi->ctl_fd;
-#ifdef UNIXWARE
- poll_list[num_poll_list].events = POLLWRNORM;
+ if (!pi->status_valid)
+ if (!proc_get_status (pi))
+ return 0; /* FIXME: not a good failure value (but what is?) */
+
+#ifdef NEW_PROC_API
+ return pi->prstatus.pr_lwp.pr_what;
#else
- poll_list[num_poll_list].events = POLLPRI;
+ return pi->prstatus.pr_what;
#endif
-
- num_poll_list++;
}
+#ifndef PIOCSSPCACT /* The following is not supported on OSF. */
/*
-
- LOCAL FUNCTION
-
- remove_fd -- Remove the fd from the poll/select list
-
- SYNOPSIS
-
- static void remove_fd (struct procinfo *);
-
- DESCRIPTION
-
- Remove the fd of the supplied procinfo from the list of fds used
- for poll/select operations.
+ * Function: proc_nsysarg
+ *
+ * returns the pr_nsysarg field (number of args to the current syscall).
*/
-static void
-remove_fd (pi)
- struct procinfo *pi;
+int
+proc_nsysarg (procinfo *pi)
{
- int i;
-
- for (i = 0; i < num_poll_list; i++)
- {
- if (poll_list[i].fd == pi->ctl_fd)
- {
- if (i != num_poll_list - 1)
- memcpy (poll_list + i, poll_list + i + 1,
- (num_poll_list - i - 1) * sizeof (struct pollfd));
-
- num_poll_list--;
+ if (!pi->status_valid)
+ if (!proc_get_status (pi))
+ return 0;
- if (num_poll_list == 0)
- free (poll_list);
- else
- poll_list = (struct pollfd *) xrealloc (poll_list,
- num_poll_list
- * sizeof (struct pollfd));
- return;
- }
- }
+#ifdef NEW_PROC_API
+ return pi->prstatus.pr_lwp.pr_nsysarg;
+#else
+ return pi->prstatus.pr_nsysarg;
+#endif
}
/*
-
- LOCAL FUNCTION
-
- procfs_read_status - get procfs fd status
-
- SYNOPSIS
-
- static int procfs_read_status (pi) struct procinfo *pi;
-
- DESCRIPTION
-
- Given a pointer to a procinfo struct, get the status of
- the status_fd in the appropriate way. Returns 0 on failure,
- 1 on success.
+ * Function: proc_sysargs
+ *
+ * returns the pr_sysarg field (pointer to the arguments of current syscall).
*/
-static int
-procfs_read_status (pi)
- struct procinfo *pi;
+long *
+proc_sysargs (procinfo *pi)
{
-#ifdef PROCFS_USE_READ_WRITE
- if ((lseek (pi->status_fd, 0, SEEK_SET) < 0) ||
- (read (pi->status_fd, (char *) &pi->prstatus,
- sizeof (gdb_prstatus_t)) != sizeof (gdb_prstatus_t)))
+ if (!pi->status_valid)
+ if (!proc_get_status (pi))
+ return NULL;
+
+#ifdef NEW_PROC_API
+ return (long *) &pi->prstatus.pr_lwp.pr_sysarg;
#else
- if (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) < 0)
+ return (long *) &pi->prstatus.pr_sysarg;
#endif
- return 0;
- else
- return 1;
}
/*
-
- LOCAL FUNCTION
-
- procfs_write_pcwstop - send a PCWSTOP to procfs fd
-
- SYNOPSIS
-
- static int procfs_write_pcwstop (pi) struct procinfo *pi;
-
- DESCRIPTION
-
- Given a pointer to a procinfo struct, send a PCWSTOP to
- the ctl_fd in the appropriate way. Returns 0 on failure,
- 1 on success.
+ * Function: proc_syscall
+ *
+ * returns the pr_syscall field (id of current syscall if we are in one).
*/
-static int
-procfs_write_pcwstop (pi)
- struct procinfo *pi;
+int
+proc_syscall (procinfo *pi)
{
-#ifdef PROCFS_USE_READ_WRITE
- long cmd = PCWSTOP;
- if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
+ if (!pi->status_valid)
+ if (!proc_get_status (pi))
+ return 0;
+
+#ifdef NEW_PROC_API
+ return pi->prstatus.pr_lwp.pr_syscall;
#else
- if (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) < 0)
+ return pi->prstatus.pr_syscall;
#endif
- return 0;
- else
- return 1;
}
+#endif /* PIOCSSPCACT */
/*
-
- LOCAL FUNCTION
-
- procfs_write_pckill - send a kill to procfs fd
-
- SYNOPSIS
-
- static void procfs_write_pckill (pi) struct procinfo *pi;
-
- DESCRIPTION
-
- Given a pointer to a procinfo struct, send a kill to
- the ctl_fd in the appropriate way. Returns 0 on failure,
- 1 on success.
+ * Function: proc_cursig:
+ *
+ * returns the pr_cursig field (current signal).
*/
-static void
-procfs_write_pckill (pi)
- struct procinfo *pi;
-{
-#ifdef PROCFS_USE_READ_WRITE
- struct proc_ctl pctl;
- pctl.cmd = PCKILL;
- pctl.data = SIGKILL;
- write (pi->ctl_fd, &pctl, sizeof (struct proc_ctl));
+long
+proc_cursig (struct procinfo *pi)
+{
+ if (!pi->status_valid)
+ if (!proc_get_status (pi))
+ return 0; /* FIXME: not a good failure value (but what is?) */
+
+#ifdef NEW_PROC_API
+ return pi->prstatus.pr_lwp.pr_cursig;
#else
- int signo = SIGKILL;
- ioctl (pi->ctl_fd, PIOCKILL, &signo);
+ return pi->prstatus.pr_cursig;
#endif
}
-static struct procinfo *
-wait_fd ()
-{
- struct procinfo *pi, *next_pi;
-#ifndef LOSING_POLL
- int num_fds;
- int i;
-#endif
+/*
+ * Function: proc_modify_flag
+ *
+ * === I appologize for the messiness of this function.
+ * === This is an area where the different versions of
+ * === /proc are more inconsistent than usual. MVS
+ *
+ * Set or reset any of the following process flags:
+ * PR_FORK -- forked child will inherit trace flags
+ * PR_RLC -- traced process runs when last /proc file closed.
+ * PR_KLC -- traced process is killed when last /proc file closed.
+ * PR_ASYNC -- LWP's get to run/stop independently.
+ *
+ * There are three methods for doing this function:
+ * 1) Newest: read/write [PCSET/PCRESET/PCUNSET]
+ * [Sol6, Sol7, UW]
+ * 2) Middle: PIOCSET/PIOCRESET
+ * [Irix, Sol5]
+ * 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC
+ * [OSF, Sol5]
+ *
+ * Note: Irix does not define PR_ASYNC.
+ * Note: OSF does not define PR_KLC.
+ * Note: OSF is the only one that can ONLY use the oldest method.
+ *
+ * Arguments:
+ * pi -- the procinfo
+ * flag -- one of PR_FORK, PR_RLC, or PR_ASYNC
+ * mode -- 1 for set, 0 for reset.
+ *
+ * Returns non-zero for success, zero for failure.
+ */
- set_sigint_trap (); /* Causes SIGINT to be passed on to the
- attached process. */
- set_sigio_trap ();
+enum { FLAG_RESET, FLAG_SET };
-wait_again:
-#ifndef LOSING_POLL
- while (1)
+static int
+proc_modify_flag (procinfo *pi, long flag, long mode)
+{
+ long win = 0; /* default to fail */
+
+ /*
+ * These operations affect the process as a whole, and applying
+ * them to an individual LWP has the same meaning as applying them
+ * to the main process. Therefore, if we're ever called with a
+ * pointer to an LWP's procinfo, let's substitute the process's
+ * procinfo and avoid opening the LWP's file descriptor
+ * unnecessarily.
+ */
+
+ if (pi->pid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
+
+#ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii */
+ /* First normalize the PCUNSET/PCRESET command opcode
+ (which for no obvious reason has a different definition
+ from one operating system to the next...) */
+#ifdef PCUNSET
+#define GDBRESET PCUNSET
+#else
+#ifdef PCRESET
+#define GDBRESET PCRESET
+#endif
+#endif
+ {
+ procfs_ctl_t arg[2];
+
+ if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC) */
+ arg[0] = PCSET;
+ else /* Reset the flag */
+ arg[0] = GDBRESET;
+
+ arg[1] = flag;
+ win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
+ }
+#else
+#ifdef PIOCSET /* Irix/Sol5 method */
+ if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC) */
{
- num_fds = poll (poll_list, num_poll_list, -1);
- if (num_fds > 0)
- break;
- if (num_fds < 0 && errno == EINTR)
- continue;
- print_sys_errmsg ("poll failed", errno);
- error ("Poll failed, returned %d", num_fds);
+ win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0);
}
-#else /* LOSING_POLL */
- pi = current_procinfo;
-
- while (!procfs_write_pcwstop (pi))
+ else /* Reset the flag */
{
- if (errno == ENOENT)
- {
- /* Process exited. */
- pi->prstatus.pr_flags = 0;
- break;
- }
- else if (errno != EINTR)
- {
- print_sys_errmsg (pi->pathname, errno);
- error ("procfs_write_pcwstop failed");
- }
+ win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0);
}
- pi->had_event = 1;
-#endif /* LOSING_POLL */
- clear_sigint_trap ();
- clear_sigio_trap ();
-
-#ifndef LOSING_POLL
+#else
+#ifdef PIOCSRLC /* Oldest method: OSF */
+ switch (flag) {
+ case PR_RLC:
+ if (mode == FLAG_SET) /* Set run-on-last-close */
+ {
+ win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0);
+ }
+ else /* Clear run-on-last-close */
+ {
+ win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0);
+ }
+ break;
+ case PR_FORK:
+ if (mode == FLAG_SET) /* Set inherit-on-fork */
+ {
+ win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0);
+ }
+ else /* Clear inherit-on-fork */
+ {
+ win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0);
+ }
+ break;
+ default:
+ win = 0; /* fail -- unknown flag (can't do PR_ASYNC) */
+ break;
+ }
+#endif
+#endif
+#endif
+#undef GDBRESET
+ /* The above operation renders the procinfo's cached pstatus obsolete. */
+ pi->status_valid = 0;
- for (i = 0; i < num_poll_list && num_fds > 0; i++)
- {
- if (0 == (poll_list[i].revents &
- (POLLWRNORM | POLLPRI | POLLERR | POLLHUP | POLLNVAL)))
- continue;
- for (pi = procinfo_list; pi; pi = next_pi)
- {
- next_pi = pi->next;
- if (poll_list[i].fd == pi->ctl_fd)
- {
- num_fds--;
- if ((poll_list[i].revents & POLLHUP) != 0 ||
- !procfs_read_status (pi))
- { /* The LWP has apparently terminated. */
- if (num_poll_list <= 1)
- {
- pi->prstatus.pr_flags = 0;
- pi->had_event = 1;
- break;
- }
- if (info_verbose)
- printf_filtered ("LWP %d exited.\n",
- (pi->pid >> 16) & 0xffff);
- close_proc_file (pi);
- i--; /* don't skip deleted entry */
- if (num_fds != 0)
- break; /* already another event to process */
- else
- goto wait_again; /* wait for another event */
- }
- pi->had_event = 1;
- break;
- }
- }
- if (!pi)
- error ("wait_fd: Couldn't find procinfo for fd %d\n",
- poll_list[i].fd);
- }
-#endif /* LOSING_POLL */
+ if (!win)
+ warning (_("procfs: modify_flag failed to turn %s %s"),
+ flag == PR_FORK ? "PR_FORK" :
+ flag == PR_RLC ? "PR_RLC" :
+#ifdef PR_ASYNC
+ flag == PR_ASYNC ? "PR_ASYNC" :
+#endif
+#ifdef PR_KLC
+ flag == PR_KLC ? "PR_KLC" :
+#endif
+ "<unknown flag>",
+ mode == FLAG_RESET ? "off" : "on");
- return pi;
+ return win;
}
/*
+ * Function: proc_set_run_on_last_close
+ *
+ * Set the run_on_last_close flag.
+ * Process with all threads will become runnable
+ * when debugger closes all /proc fds.
+ *
+ * Returns non-zero for success, zero for failure.
+ */
- LOCAL FUNCTION
+int
+proc_set_run_on_last_close (procinfo *pi)
+{
+ return proc_modify_flag (pi, PR_RLC, FLAG_SET);
+}
- lookupdesc -- translate a value to a summary desc string
+/*
+ * Function: proc_unset_run_on_last_close
+ *
+ * Reset the run_on_last_close flag.
+ * Process will NOT become runnable
+ * when debugger closes its file handles.
+ *
+ * Returns non-zero for success, zero for failure.
+ */
- SYNOPSIS
+int
+proc_unset_run_on_last_close (procinfo *pi)
+{
+ return proc_modify_flag (pi, PR_RLC, FLAG_RESET);
+}
- static char *lookupdesc (struct trans *transp, unsigned int val);
+#ifdef PR_KLC
+/*
+ * Function: proc_set_kill_on_last_close
+ *
+ * Set the kill_on_last_close flag.
+ * Process with all threads will be killed when debugger
+ * closes all /proc fds (or debugger exits or dies).
+ *
+ * Returns non-zero for success, zero for failure.
+ */
- DESCRIPTION
+int
+proc_set_kill_on_last_close (procinfo *pi)
+{
+ return proc_modify_flag (pi, PR_KLC, FLAG_SET);
+}
- Given a pointer to a translation table and a value to be translated,
- lookup the desc string and return it.
+/*
+ * Function: proc_unset_kill_on_last_close
+ *
+ * Reset the kill_on_last_close flag.
+ * Process will NOT be killed when debugger
+ * closes its file handles (or exits or dies).
+ *
+ * Returns non-zero for success, zero for failure.
*/
-static char *
-lookupdesc (transp, val)
- struct trans *transp;
- unsigned int val;
+int
+proc_unset_kill_on_last_close (procinfo *pi)
{
- char *desc;
-
- for (desc = NULL; transp->name != NULL; transp++)
- {
- if (transp->value == val)
- {
- desc = transp->desc;
- break;
- }
- }
+ return proc_modify_flag (pi, PR_KLC, FLAG_RESET);
+}
+#endif /* PR_KLC */
- /* Didn't find a translation for the specified value, set a default one. */
+/*
+ * Function: proc_set_inherit_on_fork
+ *
+ * Set inherit_on_fork flag.
+ * If the process forks a child while we are registered for events
+ * in the parent, then we will also recieve events from the child.
+ *
+ * Returns non-zero for success, zero for failure.
+ */
- if (desc == NULL)
- {
- desc = "Unknown";
- }
- return (desc);
+int
+proc_set_inherit_on_fork (procinfo *pi)
+{
+ return proc_modify_flag (pi, PR_FORK, FLAG_SET);
}
/*
+ * Function: proc_unset_inherit_on_fork
+ *
+ * Reset inherit_on_fork flag.
+ * If the process forks a child while we are registered for events
+ * in the parent, then we will NOT recieve events from the child.
+ *
+ * Returns non-zero for success, zero for failure.
+ */
- LOCAL FUNCTION
-
- lookupname -- translate a value to symbolic name
+int
+proc_unset_inherit_on_fork (procinfo *pi)
+{
+ return proc_modify_flag (pi, PR_FORK, FLAG_RESET);
+}
- SYNOPSIS
+#ifdef PR_ASYNC
+/*
+ * Function: proc_set_async
+ *
+ * Set PR_ASYNC flag.
+ * If one LWP stops because of a debug event (signal etc.),
+ * the remaining LWPs will continue to run.
+ *
+ * Returns non-zero for success, zero for failure.
+ */
- static char *lookupname (struct trans *transp, unsigned int val,
- char *prefix);
+int
+proc_set_async (procinfo *pi)
+{
+ return proc_modify_flag (pi, PR_ASYNC, FLAG_SET);
+}
- DESCRIPTION
+/*
+ * Function: proc_unset_async
+ *
+ * Reset PR_ASYNC flag.
+ * If one LWP stops because of a debug event (signal etc.),
+ * then all other LWPs will stop as well.
+ *
+ * Returns non-zero for success, zero for failure.
+ */
- Given a pointer to a translation table, a value to be translated,
- and a default prefix to return if the value can't be translated,
- match the value with one of the translation table entries and
- return a pointer to the symbolic name.
+int
+proc_unset_async (procinfo *pi)
+{
+ return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET);
+}
+#endif /* PR_ASYNC */
- If no match is found it just returns the value as a printable string,
- with the given prefix. The previous such value, if any, is freed
- at this time.
+/*
+ * Function: proc_stop_process
+ *
+ * Request the process/LWP to stop. Does not wait.
+ * Returns non-zero for success, zero for failure.
*/
-static char *
-lookupname (transp, val, prefix)
- struct trans *transp;
- unsigned int val;
- char *prefix;
+int
+proc_stop_process (procinfo *pi)
{
- static char *locbuf;
- char *name;
-
- for (name = NULL; transp->name != NULL; transp++)
- {
- if (transp->value == val)
- {
- name = transp->name;
- break;
- }
- }
+ int win;
- /* Didn't find a translation for the specified value, build a default
- one using the specified prefix and return it. The lifetime of
- the value is only until the next one is needed. */
+ /*
+ * We might conceivably apply this operation to an LWP, and
+ * the LWP's ctl file descriptor might not be open.
+ */
- if (name == NULL)
+ if (pi->ctl_fd == 0 &&
+ open_procinfo_files (pi, FD_CTL) == 0)
+ return 0;
+ else
{
- if (locbuf != NULL)
+#ifdef NEW_PROC_API
+ procfs_ctl_t cmd = PCSTOP;
+ win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd));
+#else /* ioctl method */
+ win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0);
+ /* Note: the call also reads the prstatus. */
+ if (win)
{
- free (locbuf);
+ pi->status_valid = 1;
+ PROC_PRETTYFPRINT_STATUS (proc_flags (pi),
+ proc_why (pi),
+ proc_what (pi),
+ proc_get_current_thread (pi));
}
- locbuf = xmalloc (strlen (prefix) + 16);
- sprintf (locbuf, "%s %u", prefix, val);
- name = locbuf;
+#endif
}
- return (name);
+
+ return win;
}
-static char *
-sigcodename (sip)
- siginfo_t *sip;
+/*
+ * Function: proc_wait_for_stop
+ *
+ * Wait for the process or LWP to stop (block until it does).
+ * Returns non-zero for success, zero for failure.
+ */
+
+int
+proc_wait_for_stop (procinfo *pi)
{
- struct sigcode *scp;
- char *name = NULL;
- static char locbuf[32];
+ int win;
- for (scp = siginfo_table; scp->codename != NULL; scp++)
- {
- if ((scp->signo == sip->si_signo) &&
- (scp->code == sip->si_code))
- {
- name = scp->codename;
- break;
- }
- }
- if (name == NULL)
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
+
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
+
+#ifdef NEW_PROC_API
+ {
+ procfs_ctl_t cmd = PCWSTOP;
+ win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd));
+ /* We been runnin' and we stopped -- need to update status. */
+ pi->status_valid = 0;
+ }
+#else /* ioctl method */
+ win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0);
+ /* Above call also refreshes the prstatus. */
+ if (win)
{
- sprintf (locbuf, "sigcode %u", sip->si_signo);
- name = locbuf;
+ pi->status_valid = 1;
+ PROC_PRETTYFPRINT_STATUS (proc_flags (pi),
+ proc_why (pi),
+ proc_what (pi),
+ proc_get_current_thread (pi));
}
- return (name);
+#endif
+
+ return win;
}
-static char *
-sigcodedesc (sip)
- siginfo_t *sip;
+/*
+ * Function: proc_run_process
+ *
+ * Make the process or LWP runnable.
+ * Options (not all are implemented):
+ * - single-step
+ * - clear current fault
+ * - clear current signal
+ * - abort the current system call
+ * - stop as soon as finished with system call
+ * - (ioctl): set traced signal set
+ * - (ioctl): set held signal set
+ * - (ioctl): set traced fault set
+ * - (ioctl): set start pc (vaddr)
+ * Always clear the current fault.
+ * Clear the current signal if 'signo' is zero.
+ *
+ * Arguments:
+ * pi the process or LWP to operate on.
+ * step if true, set the process or LWP to trap after one instr.
+ * signo if zero, clear the current signal if any.
+ * if non-zero, set the current signal to this one.
+ *
+ * Returns non-zero for success, zero for failure.
+ */
+
+int
+proc_run_process (procinfo *pi, int step, int signo)
{
- struct sigcode *scp;
- char *desc = NULL;
+ int win;
+ int runflags;
- for (scp = siginfo_table; scp->codename != NULL; scp++)
- {
- if ((scp->signo == sip->si_signo) &&
- (scp->code == sip->si_code))
- {
- desc = scp->desc;
- break;
- }
- }
- if (desc == NULL)
+ /*
+ * We will probably have to apply this operation to individual threads,
+ * so make sure the control file descriptor is open.
+ */
+
+ if (pi->ctl_fd == 0 &&
+ open_procinfo_files (pi, FD_CTL) == 0)
{
- desc = "Unrecognized signal or trap use";
+ return 0;
}
- return (desc);
+
+ runflags = PRCFAULT; /* always clear current fault */
+ if (step)
+ runflags |= PRSTEP;
+ if (signo == 0)
+ runflags |= PRCSIG;
+ else if (signo != -1) /* -1 means do nothing W.R.T. signals */
+ proc_set_current_signal (pi, signo);
+
+#ifdef NEW_PROC_API
+ {
+ procfs_ctl_t cmd[2];
+
+ cmd[0] = PCRUN;
+ cmd[1] = runflags;
+ win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd));
+ }
+#else /* ioctl method */
+ {
+ prrun_t prrun;
+
+ memset (&prrun, 0, sizeof (prrun));
+ prrun.pr_flags = runflags;
+ win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0);
+ }
+#endif
+
+ return win;
}
/*
+ * Function: proc_set_traced_signals
+ *
+ * Register to trace signals in the process or LWP.
+ * Returns non-zero for success, zero for failure.
+ */
+
+int
+proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset)
+{
+ int win;
+
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
- LOCAL FUNCTION
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
- syscallname - translate a system call number into a system call name
+#ifdef NEW_PROC_API
+ {
+ struct {
+ procfs_ctl_t cmd;
+ /* Use char array to avoid alignment issues. */
+ char sigset[sizeof (gdb_sigset_t)];
+ } arg;
- SYNOPSIS
+ arg.cmd = PCSTRACE;
+ memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t));
- char *syscallname (int syscallnum)
+ win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg));
+ }
+#else /* ioctl method */
+ win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0);
+#endif
+ /* The above operation renders the procinfo's cached pstatus obsolete. */
+ pi->status_valid = 0;
- DESCRIPTION
+ if (!win)
+ warning (_("procfs: set_traced_signals failed"));
+ return win;
+}
- Given a system call number, translate it into the printable name
- of a system call, or into "syscall <num>" if it is an unknown
- number.
+/*
+ * Function: proc_set_traced_faults
+ *
+ * Register to trace hardware faults in the process or LWP.
+ * Returns non-zero for success, zero for failure.
*/
-static char *
-syscallname (syscallnum)
- int syscallnum;
+int
+proc_set_traced_faults (procinfo *pi, fltset_t *fltset)
{
- static char locbuf[32];
+ int win;
- if (syscallnum >= 0 && syscallnum < MAX_SYSCALLS
- && syscall_table[syscallnum] != NULL)
- return syscall_table[syscallnum];
- else
- {
- sprintf (locbuf, "syscall %u", syscallnum);
- return locbuf;
- }
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
+
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
+
+#ifdef NEW_PROC_API
+ {
+ struct {
+ procfs_ctl_t cmd;
+ /* Use char array to avoid alignment issues. */
+ char fltset[sizeof (fltset_t)];
+ } arg;
+
+ arg.cmd = PCSFAULT;
+ memcpy (&arg.fltset, fltset, sizeof (fltset_t));
+
+ win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg));
+ }
+#else /* ioctl method */
+ win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0);
+#endif
+ /* The above operation renders the procinfo's cached pstatus obsolete. */
+ pi->status_valid = 0;
+
+ return win;
}
/*
+ * Function: proc_set_traced_sysentry
+ *
+ * Register to trace entry to system calls in the process or LWP.
+ * Returns non-zero for success, zero for failure.
+ */
+
+int
+proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset)
+{
+ int win;
+
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
+
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
- LOCAL FUNCTION
+#ifdef NEW_PROC_API
+ {
+ struct gdb_proc_ctl_pcsentry {
+ procfs_ctl_t cmd;
+ /* Use char array to avoid alignment issues. */
+ char sysset[sizeof (sysset_t)];
+ } *argp;
+ int argp_size = sizeof (struct gdb_proc_ctl_pcsentry)
+ - sizeof (sysset_t)
+ + sysset_t_size (pi);
+
+ argp = xmalloc (argp_size);
+
+ argp->cmd = PCSENTRY;
+ memcpy (&argp->sysset, sysset, sysset_t_size (pi));
+
+ win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size);
+ xfree (argp);
+ }
+#else /* ioctl method */
+ win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0);
+#endif
+ /* The above operation renders the procinfo's cached pstatus obsolete. */
+ pi->status_valid = 0;
+
+ return win;
+}
- init_syscall_table - initialize syscall translation table
+/*
+ * Function: proc_set_traced_sysexit
+ *
+ * Register to trace exit from system calls in the process or LWP.
+ * Returns non-zero for success, zero for failure.
+ */
- SYNOPSIS
+int
+proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset)
+{
+ int win;
- void init_syscall_table (void)
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
- DESCRIPTION
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
- Dynamically initialize the translation table to convert system
- call numbers into printable system call names. Done once per
- gdb run, on initialization.
+#ifdef NEW_PROC_API
+ {
+ struct gdb_proc_ctl_pcsexit {
+ procfs_ctl_t cmd;
+ /* Use char array to avoid alignment issues. */
+ char sysset[sizeof (sysset_t)];
+ } *argp;
+ int argp_size = sizeof (struct gdb_proc_ctl_pcsexit)
+ - sizeof (sysset_t)
+ + sysset_t_size (pi);
+
+ argp = xmalloc (argp_size);
+
+ argp->cmd = PCSEXIT;
+ memcpy (&argp->sysset, sysset, sysset_t_size (pi));
+
+ win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size);
+ xfree (argp);
+ }
+#else /* ioctl method */
+ win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0);
+#endif
+ /* The above operation renders the procinfo's cached pstatus obsolete. */
+ pi->status_valid = 0;
- NOTES
+ return win;
+}
- This is awfully ugly, but preprocessor tricks to make it prettier
- tend to be nonportable.
+/*
+ * Function: proc_set_held_signals
+ *
+ * Specify the set of blocked / held signals in the process or LWP.
+ * Returns non-zero for success, zero for failure.
*/
-static void
-init_syscall_table ()
+int
+proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold)
{
-#if defined (SYS_exit)
- syscall_table[SYS_exit] = "exit";
-#endif
-#if defined (SYS_fork)
- syscall_table[SYS_fork] = "fork";
-#endif
-#if defined (SYS_read)
- syscall_table[SYS_read] = "read";
+ int win;
+
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
+
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
+
+#ifdef NEW_PROC_API
+ {
+ struct {
+ procfs_ctl_t cmd;
+ /* Use char array to avoid alignment issues. */
+ char hold[sizeof (gdb_sigset_t)];
+ } arg;
+
+ arg.cmd = PCSHOLD;
+ memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t));
+ win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
+ }
+#else
+ win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0);
#endif
-#if defined (SYS_write)
- syscall_table[SYS_write] = "write";
+ /* The above operation renders the procinfo's cached pstatus obsolete. */
+ pi->status_valid = 0;
+
+ return win;
+}
+
+/*
+ * Function: proc_get_pending_signals
+ *
+ * returns the set of signals that are pending in the process or LWP.
+ * Will also copy the sigset if 'save' is non-zero.
+ */
+
+gdb_sigset_t *
+proc_get_pending_signals (procinfo *pi, gdb_sigset_t *save)
+{
+ gdb_sigset_t *ret = NULL;
+
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
+
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
+
+ if (!pi->status_valid)
+ if (!proc_get_status (pi))
+ return NULL;
+
+#ifdef NEW_PROC_API
+ ret = &pi->prstatus.pr_lwp.pr_lwppend;
+#else
+ ret = &pi->prstatus.pr_sigpend;
#endif
-#if defined (SYS_open)
- syscall_table[SYS_open] = "open";
+ if (save && ret)
+ memcpy (save, ret, sizeof (gdb_sigset_t));
+
+ return ret;
+}
+
+/*
+ * Function: proc_get_signal_actions
+ *
+ * returns the set of signal actions.
+ * Will also copy the sigactionset if 'save' is non-zero.
+ */
+
+gdb_sigaction_t *
+proc_get_signal_actions (procinfo *pi, gdb_sigaction_t *save)
+{
+ gdb_sigaction_t *ret = NULL;
+
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
+
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
+
+ if (!pi->status_valid)
+ if (!proc_get_status (pi))
+ return NULL;
+
+#ifdef NEW_PROC_API
+ ret = &pi->prstatus.pr_lwp.pr_action;
+#else
+ ret = &pi->prstatus.pr_action;
#endif
-#if defined (SYS_close)
- syscall_table[SYS_close] = "close";
+ if (save && ret)
+ memcpy (save, ret, sizeof (gdb_sigaction_t));
+
+ return ret;
+}
+
+/*
+ * Function: proc_get_held_signals
+ *
+ * returns the set of signals that are held / blocked.
+ * Will also copy the sigset if 'save' is non-zero.
+ */
+
+gdb_sigset_t *
+proc_get_held_signals (procinfo *pi, gdb_sigset_t *save)
+{
+ gdb_sigset_t *ret = NULL;
+
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
+
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
+
+#ifdef NEW_PROC_API
+ if (!pi->status_valid)
+ if (!proc_get_status (pi))
+ return NULL;
+
+#ifdef UNIXWARE
+ ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask;
+#else
+ ret = &pi->prstatus.pr_lwp.pr_lwphold;
+#endif /* UNIXWARE */
+#else /* not NEW_PROC_API */
+ {
+ static gdb_sigset_t sigheld;
+
+ if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0)
+ ret = &sigheld;
+ }
+#endif /* NEW_PROC_API */
+ if (save && ret)
+ memcpy (save, ret, sizeof (gdb_sigset_t));
+
+ return ret;
+}
+
+/*
+ * Function: proc_get_traced_signals
+ *
+ * returns the set of signals that are traced / debugged.
+ * Will also copy the sigset if 'save' is non-zero.
+ */
+
+gdb_sigset_t *
+proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save)
+{
+ gdb_sigset_t *ret = NULL;
+
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
+
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
+
+#ifdef NEW_PROC_API
+ if (!pi->status_valid)
+ if (!proc_get_status (pi))
+ return NULL;
+
+ ret = &pi->prstatus.pr_sigtrace;
+#else
+ {
+ static gdb_sigset_t sigtrace;
+
+ if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0)
+ ret = &sigtrace;
+ }
#endif
-#if defined (SYS_wait)
- syscall_table[SYS_wait] = "wait";
-#endif
-#if defined (SYS_creat)
- syscall_table[SYS_creat] = "creat";
-#endif
-#if defined (SYS_link)
- syscall_table[SYS_link] = "link";
-#endif
-#if defined (SYS_unlink)
- syscall_table[SYS_unlink] = "unlink";
-#endif
-#if defined (SYS_exec)
- syscall_table[SYS_exec] = "exec";
-#endif
-#if defined (SYS_execv)
- syscall_table[SYS_execv] = "execv";
-#endif
-#if defined (SYS_execve)
- syscall_table[SYS_execve] = "execve";
-#endif
-#if defined (SYS_chdir)
- syscall_table[SYS_chdir] = "chdir";
-#endif
-#if defined (SYS_time)
- syscall_table[SYS_time] = "time";
-#endif
-#if defined (SYS_mknod)
- syscall_table[SYS_mknod] = "mknod";
-#endif
-#if defined (SYS_chmod)
- syscall_table[SYS_chmod] = "chmod";
-#endif
-#if defined (SYS_chown)
- syscall_table[SYS_chown] = "chown";
-#endif
-#if defined (SYS_brk)
- syscall_table[SYS_brk] = "brk";
-#endif
-#if defined (SYS_stat)
- syscall_table[SYS_stat] = "stat";
-#endif
-#if defined (SYS_lseek)
- syscall_table[SYS_lseek] = "lseek";
-#endif
-#if defined (SYS_getpid)
- syscall_table[SYS_getpid] = "getpid";
-#endif
-#if defined (SYS_mount)
- syscall_table[SYS_mount] = "mount";
-#endif
-#if defined (SYS_umount)
- syscall_table[SYS_umount] = "umount";
-#endif
-#if defined (SYS_setuid)
- syscall_table[SYS_setuid] = "setuid";
-#endif
-#if defined (SYS_getuid)
- syscall_table[SYS_getuid] = "getuid";
-#endif
-#if defined (SYS_stime)
- syscall_table[SYS_stime] = "stime";
-#endif
-#if defined (SYS_ptrace)
- syscall_table[SYS_ptrace] = "ptrace";
-#endif
-#if defined (SYS_alarm)
- syscall_table[SYS_alarm] = "alarm";
-#endif
-#if defined (SYS_fstat)
- syscall_table[SYS_fstat] = "fstat";
-#endif
-#if defined (SYS_pause)
- syscall_table[SYS_pause] = "pause";
-#endif
-#if defined (SYS_utime)
- syscall_table[SYS_utime] = "utime";
-#endif
-#if defined (SYS_stty)
- syscall_table[SYS_stty] = "stty";
-#endif
-#if defined (SYS_gtty)
- syscall_table[SYS_gtty] = "gtty";
-#endif
-#if defined (SYS_access)
- syscall_table[SYS_access] = "access";
-#endif
-#if defined (SYS_nice)
- syscall_table[SYS_nice] = "nice";
-#endif
-#if defined (SYS_statfs)
- syscall_table[SYS_statfs] = "statfs";
-#endif
-#if defined (SYS_sync)
- syscall_table[SYS_sync] = "sync";
-#endif
-#if defined (SYS_kill)
- syscall_table[SYS_kill] = "kill";
-#endif
-#if defined (SYS_fstatfs)
- syscall_table[SYS_fstatfs] = "fstatfs";
-#endif
-#if defined (SYS_pgrpsys)
- syscall_table[SYS_pgrpsys] = "pgrpsys";
-#endif
-#if defined (SYS_xenix)
- syscall_table[SYS_xenix] = "xenix";
-#endif
-#if defined (SYS_dup)
- syscall_table[SYS_dup] = "dup";
-#endif
-#if defined (SYS_pipe)
- syscall_table[SYS_pipe] = "pipe";
-#endif
-#if defined (SYS_times)
- syscall_table[SYS_times] = "times";
-#endif
-#if defined (SYS_profil)
- syscall_table[SYS_profil] = "profil";
-#endif
-#if defined (SYS_plock)
- syscall_table[SYS_plock] = "plock";
-#endif
-#if defined (SYS_setgid)
- syscall_table[SYS_setgid] = "setgid";
-#endif
-#if defined (SYS_getgid)
- syscall_table[SYS_getgid] = "getgid";
-#endif
-#if defined (SYS_signal)
- syscall_table[SYS_signal] = "signal";
-#endif
-#if defined (SYS_msgsys)
- syscall_table[SYS_msgsys] = "msgsys";
-#endif
-#if defined (SYS_sys3b)
- syscall_table[SYS_sys3b] = "sys3b";
-#endif
-#if defined (SYS_sysi86)
- syscall_table[SYS_sysi86] = "sysi86";
-#endif
-#if defined (SYS_acct)
- syscall_table[SYS_acct] = "acct";
-#endif
-#if defined (SYS_shmsys)
- syscall_table[SYS_shmsys] = "shmsys";
-#endif
-#if defined (SYS_semsys)
- syscall_table[SYS_semsys] = "semsys";
-#endif
-#if defined (SYS_ioctl)
- syscall_table[SYS_ioctl] = "ioctl";
-#endif
-#if defined (SYS_uadmin)
- syscall_table[SYS_uadmin] = "uadmin";
-#endif
-#if defined (SYS_utssys)
- syscall_table[SYS_utssys] = "utssys";
-#endif
-#if defined (SYS_fsync)
- syscall_table[SYS_fsync] = "fsync";
-#endif
-#if defined (SYS_umask)
- syscall_table[SYS_umask] = "umask";
-#endif
-#if defined (SYS_chroot)
- syscall_table[SYS_chroot] = "chroot";
-#endif
-#if defined (SYS_fcntl)
- syscall_table[SYS_fcntl] = "fcntl";
-#endif
-#if defined (SYS_ulimit)
- syscall_table[SYS_ulimit] = "ulimit";
-#endif
-#if defined (SYS_rfsys)
- syscall_table[SYS_rfsys] = "rfsys";
-#endif
-#if defined (SYS_rmdir)
- syscall_table[SYS_rmdir] = "rmdir";
-#endif
-#if defined (SYS_mkdir)
- syscall_table[SYS_mkdir] = "mkdir";
-#endif
-#if defined (SYS_getdents)
- syscall_table[SYS_getdents] = "getdents";
-#endif
-#if defined (SYS_sysfs)
- syscall_table[SYS_sysfs] = "sysfs";
-#endif
-#if defined (SYS_getmsg)
- syscall_table[SYS_getmsg] = "getmsg";
-#endif
-#if defined (SYS_putmsg)
- syscall_table[SYS_putmsg] = "putmsg";
-#endif
-#if defined (SYS_poll)
- syscall_table[SYS_poll] = "poll";
-#endif
-#if defined (SYS_lstat)
- syscall_table[SYS_lstat] = "lstat";
-#endif
-#if defined (SYS_symlink)
- syscall_table[SYS_symlink] = "symlink";
-#endif
-#if defined (SYS_readlink)
- syscall_table[SYS_readlink] = "readlink";
-#endif
-#if defined (SYS_setgroups)
- syscall_table[SYS_setgroups] = "setgroups";
-#endif
-#if defined (SYS_getgroups)
- syscall_table[SYS_getgroups] = "getgroups";
-#endif
-#if defined (SYS_fchmod)
- syscall_table[SYS_fchmod] = "fchmod";
-#endif
-#if defined (SYS_fchown)
- syscall_table[SYS_fchown] = "fchown";
-#endif
-#if defined (SYS_sigprocmask)
- syscall_table[SYS_sigprocmask] = "sigprocmask";
-#endif
-#if defined (SYS_sigsuspend)
- syscall_table[SYS_sigsuspend] = "sigsuspend";
-#endif
-#if defined (SYS_sigaltstack)
- syscall_table[SYS_sigaltstack] = "sigaltstack";
-#endif
-#if defined (SYS_sigaction)
- syscall_table[SYS_sigaction] = "sigaction";
-#endif
-#if defined (SYS_sigpending)
- syscall_table[SYS_sigpending] = "sigpending";
-#endif
-#if defined (SYS_context)
- syscall_table[SYS_context] = "context";
-#endif
-#if defined (SYS_evsys)
- syscall_table[SYS_evsys] = "evsys";
-#endif
-#if defined (SYS_evtrapret)
- syscall_table[SYS_evtrapret] = "evtrapret";
-#endif
-#if defined (SYS_statvfs)
- syscall_table[SYS_statvfs] = "statvfs";
-#endif
-#if defined (SYS_fstatvfs)
- syscall_table[SYS_fstatvfs] = "fstatvfs";
-#endif
-#if defined (SYS_nfssys)
- syscall_table[SYS_nfssys] = "nfssys";
-#endif
-#if defined (SYS_waitsys)
- syscall_table[SYS_waitsys] = "waitsys";
-#endif
-#if defined (SYS_sigsendsys)
- syscall_table[SYS_sigsendsys] = "sigsendsys";
-#endif
-#if defined (SYS_hrtsys)
- syscall_table[SYS_hrtsys] = "hrtsys";
-#endif
-#if defined (SYS_acancel)
- syscall_table[SYS_acancel] = "acancel";
-#endif
-#if defined (SYS_async)
- syscall_table[SYS_async] = "async";
-#endif
-#if defined (SYS_priocntlsys)
- syscall_table[SYS_priocntlsys] = "priocntlsys";
-#endif
-#if defined (SYS_pathconf)
- syscall_table[SYS_pathconf] = "pathconf";
-#endif
-#if defined (SYS_mincore)
- syscall_table[SYS_mincore] = "mincore";
-#endif
-#if defined (SYS_mmap)
- syscall_table[SYS_mmap] = "mmap";
-#endif
-#if defined (SYS_mprotect)
- syscall_table[SYS_mprotect] = "mprotect";
-#endif
-#if defined (SYS_munmap)
- syscall_table[SYS_munmap] = "munmap";
-#endif
-#if defined (SYS_fpathconf)
- syscall_table[SYS_fpathconf] = "fpathconf";
-#endif
-#if defined (SYS_vfork)
- syscall_table[SYS_vfork] = "vfork";
-#endif
-#if defined (SYS_fchdir)
- syscall_table[SYS_fchdir] = "fchdir";
-#endif
-#if defined (SYS_readv)
- syscall_table[SYS_readv] = "readv";
-#endif
-#if defined (SYS_writev)
- syscall_table[SYS_writev] = "writev";
-#endif
-#if defined (SYS_xstat)
- syscall_table[SYS_xstat] = "xstat";
-#endif
-#if defined (SYS_lxstat)
- syscall_table[SYS_lxstat] = "lxstat";
-#endif
-#if defined (SYS_fxstat)
- syscall_table[SYS_fxstat] = "fxstat";
-#endif
-#if defined (SYS_xmknod)
- syscall_table[SYS_xmknod] = "xmknod";
-#endif
-#if defined (SYS_clocal)
- syscall_table[SYS_clocal] = "clocal";
-#endif
-#if defined (SYS_setrlimit)
- syscall_table[SYS_setrlimit] = "setrlimit";
-#endif
-#if defined (SYS_getrlimit)
- syscall_table[SYS_getrlimit] = "getrlimit";
-#endif
-#if defined (SYS_lchown)
- syscall_table[SYS_lchown] = "lchown";
-#endif
-#if defined (SYS_memcntl)
- syscall_table[SYS_memcntl] = "memcntl";
-#endif
-#if defined (SYS_getpmsg)
- syscall_table[SYS_getpmsg] = "getpmsg";
-#endif
-#if defined (SYS_putpmsg)
- syscall_table[SYS_putpmsg] = "putpmsg";
-#endif
-#if defined (SYS_rename)
- syscall_table[SYS_rename] = "rename";
-#endif
-#if defined (SYS_uname)
- syscall_table[SYS_uname] = "uname";
-#endif
-#if defined (SYS_setegid)
- syscall_table[SYS_setegid] = "setegid";
-#endif
-#if defined (SYS_sysconfig)
- syscall_table[SYS_sysconfig] = "sysconfig";
-#endif
-#if defined (SYS_adjtime)
- syscall_table[SYS_adjtime] = "adjtime";
-#endif
-#if defined (SYS_systeminfo)
- syscall_table[SYS_systeminfo] = "systeminfo";
-#endif
-#if defined (SYS_seteuid)
- syscall_table[SYS_seteuid] = "seteuid";
-#endif
-#if defined (SYS_sproc)
- syscall_table[SYS_sproc] = "sproc";
-#endif
-#if defined (SYS_keyctl)
- syscall_table[SYS_keyctl] = "keyctl";
-#endif
-#if defined (SYS_secsys)
- syscall_table[SYS_secsys] = "secsys";
-#endif
-#if defined (SYS_filepriv)
- syscall_table[SYS_filepriv] = "filepriv";
-#endif
-#if defined (SYS_procpriv)
- syscall_table[SYS_procpriv] = "procpriv";
-#endif
-#if defined (SYS_devstat)
- syscall_table[SYS_devstat] = "devstat";
-#endif
-#if defined (SYS_aclipc)
- syscall_table[SYS_aclipc] = "aclipc";
-#endif
-#if defined (SYS_fdevstat)
- syscall_table[SYS_fdevstat] = "fdevstat";
-#endif
-#if defined (SYS_flvlfile)
- syscall_table[SYS_flvlfile] = "flvlfile";
-#endif
-#if defined (SYS_lvlfile)
- syscall_table[SYS_lvlfile] = "lvlfile";
-#endif
-#if defined (SYS_lvlequal)
- syscall_table[SYS_lvlequal] = "lvlequal";
-#endif
-#if defined (SYS_lvlproc)
- syscall_table[SYS_lvlproc] = "lvlproc";
-#endif
-#if defined (SYS_lvlipc)
- syscall_table[SYS_lvlipc] = "lvlipc";
-#endif
-#if defined (SYS_acl)
- syscall_table[SYS_acl] = "acl";
-#endif
-#if defined (SYS_auditevt)
- syscall_table[SYS_auditevt] = "auditevt";
-#endif
-#if defined (SYS_auditctl)
- syscall_table[SYS_auditctl] = "auditctl";
-#endif
-#if defined (SYS_auditdmp)
- syscall_table[SYS_auditdmp] = "auditdmp";
-#endif
-#if defined (SYS_auditlog)
- syscall_table[SYS_auditlog] = "auditlog";
-#endif
-#if defined (SYS_auditbuf)
- syscall_table[SYS_auditbuf] = "auditbuf";
-#endif
-#if defined (SYS_lvldom)
- syscall_table[SYS_lvldom] = "lvldom";
-#endif
-#if defined (SYS_lvlvfs)
- syscall_table[SYS_lvlvfs] = "lvlvfs";
-#endif
-#if defined (SYS_mkmld)
- syscall_table[SYS_mkmld] = "mkmld";
-#endif
-#if defined (SYS_mldmode)
- syscall_table[SYS_mldmode] = "mldmode";
-#endif
-#if defined (SYS_secadvise)
- syscall_table[SYS_secadvise] = "secadvise";
-#endif
-#if defined (SYS_online)
- syscall_table[SYS_online] = "online";
-#endif
-#if defined (SYS_setitimer)
- syscall_table[SYS_setitimer] = "setitimer";
-#endif
-#if defined (SYS_getitimer)
- syscall_table[SYS_getitimer] = "getitimer";
-#endif
-#if defined (SYS_gettimeofday)
- syscall_table[SYS_gettimeofday] = "gettimeofday";
-#endif
-#if defined (SYS_settimeofday)
- syscall_table[SYS_settimeofday] = "settimeofday";
-#endif
-#if defined (SYS_lwp_create)
- syscall_table[SYS_lwp_create] = "_lwp_create";
-#endif
-#if defined (SYS_lwp_exit)
- syscall_table[SYS_lwp_exit] = "_lwp_exit";
-#endif
-#if defined (SYS_lwp_wait)
- syscall_table[SYS_lwp_wait] = "_lwp_wait";
-#endif
-#if defined (SYS_lwp_self)
- syscall_table[SYS_lwp_self] = "_lwp_self";
-#endif
-#if defined (SYS_lwp_info)
- syscall_table[SYS_lwp_info] = "_lwp_info";
-#endif
-#if defined (SYS_lwp_private)
- syscall_table[SYS_lwp_private] = "_lwp_private";
-#endif
-#if defined (SYS_processor_bind)
- syscall_table[SYS_processor_bind] = "processor_bind";
-#endif
-#if defined (SYS_processor_exbind)
- syscall_table[SYS_processor_exbind] = "processor_exbind";
-#endif
-#if defined (SYS_prepblock)
- syscall_table[SYS_prepblock] = "prepblock";
-#endif
-#if defined (SYS_block)
- syscall_table[SYS_block] = "block";
-#endif
-#if defined (SYS_rdblock)
- syscall_table[SYS_rdblock] = "rdblock";
-#endif
-#if defined (SYS_unblock)
- syscall_table[SYS_unblock] = "unblock";
-#endif
-#if defined (SYS_cancelblock)
- syscall_table[SYS_cancelblock] = "cancelblock";
-#endif
-#if defined (SYS_pread)
- syscall_table[SYS_pread] = "pread";
-#endif
-#if defined (SYS_pwrite)
- syscall_table[SYS_pwrite] = "pwrite";
-#endif
-#if defined (SYS_truncate)
- syscall_table[SYS_truncate] = "truncate";
-#endif
-#if defined (SYS_ftruncate)
- syscall_table[SYS_ftruncate] = "ftruncate";
-#endif
-#if defined (SYS_lwp_kill)
- syscall_table[SYS_lwp_kill] = "_lwp_kill";
-#endif
-#if defined (SYS_sigwait)
- syscall_table[SYS_sigwait] = "sigwait";
-#endif
-#if defined (SYS_fork1)
- syscall_table[SYS_fork1] = "fork1";
-#endif
-#if defined (SYS_forkall)
- syscall_table[SYS_forkall] = "forkall";
-#endif
-#if defined (SYS_modload)
- syscall_table[SYS_modload] = "modload";
-#endif
-#if defined (SYS_moduload)
- syscall_table[SYS_moduload] = "moduload";
-#endif
-#if defined (SYS_modpath)
- syscall_table[SYS_modpath] = "modpath";
-#endif
-#if defined (SYS_modstat)
- syscall_table[SYS_modstat] = "modstat";
-#endif
-#if defined (SYS_modadm)
- syscall_table[SYS_modadm] = "modadm";
-#endif
-#if defined (SYS_getksym)
- syscall_table[SYS_getksym] = "getksym";
-#endif
-#if defined (SYS_lwp_suspend)
- syscall_table[SYS_lwp_suspend] = "_lwp_suspend";
-#endif
-#if defined (SYS_lwp_continue)
- syscall_table[SYS_lwp_continue] = "_lwp_continue";
-#endif
-#if defined (SYS_priocntllst)
- syscall_table[SYS_priocntllst] = "priocntllst";
-#endif
-#if defined (SYS_sleep)
- syscall_table[SYS_sleep] = "sleep";
-#endif
-#if defined (SYS_lwp_sema_wait)
- syscall_table[SYS_lwp_sema_wait] = "_lwp_sema_wait";
-#endif
-#if defined (SYS_lwp_sema_post)
- syscall_table[SYS_lwp_sema_post] = "_lwp_sema_post";
-#endif
-#if defined (SYS_lwp_sema_trywait)
- syscall_table[SYS_lwp_sema_trywait] = "lwp_sema_trywait";
-#endif
-#if defined(SYS_fstatvfs64)
- syscall_table[SYS_fstatvfs64] = "fstatvfs64";
-#endif
-#if defined(SYS_statvfs64)
- syscall_table[SYS_statvfs64] = "statvfs64";
-#endif
-#if defined(SYS_ftruncate64)
- syscall_table[SYS_ftruncate64] = "ftruncate64";
-#endif
-#if defined(SYS_truncate64)
- syscall_table[SYS_truncate64] = "truncate64";
-#endif
-#if defined(SYS_getrlimit64)
- syscall_table[SYS_getrlimit64] = "getrlimit64";
-#endif
-#if defined(SYS_setrlimit64)
- syscall_table[SYS_setrlimit64] = "setrlimit64";
-#endif
-#if defined(SYS_lseek64)
- syscall_table[SYS_lseek64] = "lseek64";
-#endif
-#if defined(SYS_mmap64)
- syscall_table[SYS_mmap64] = "mmap64";
-#endif
-#if defined(SYS_pread64)
- syscall_table[SYS_pread64] = "pread64";
-#endif
-#if defined(SYS_creat64)
- syscall_table[SYS_creat64] = "creat64";
-#endif
-#if defined(SYS_dshmsys)
- syscall_table[SYS_dshmsys] = "dshmsys";
-#endif
-#if defined(SYS_invlpg)
- syscall_table[SYS_invlpg] = "invlpg";
-#endif
-#if defined(SYS_cg_ids)
- syscall_table[SYS_cg_ids] = "cg_ids";
-#endif
-#if defined(SYS_cg_processors)
- syscall_table[SYS_cg_processors] = "cg_processors";
-#endif
-#if defined(SYS_cg_info)
- syscall_table[SYS_cg_info] = "cg_info";
-#endif
-#if defined(SYS_cg_bind)
- syscall_table[SYS_cg_bind] = "cg_bind";
-#endif
-#if defined(SYS_cg_current)
- syscall_table[SYS_cg_current] = "cg_current";
-#endif
-#if defined(SYS_cg_memloc)
- syscall_table[SYS_cg_memloc] = "cg_memloc";
-#endif
-}
-
-/*
-
- LOCAL FUNCTION
-
- procfs_kill_inferior - kill any current inferior
-
- SYNOPSIS
-
- void procfs_kill_inferior (void)
-
- DESCRIPTION
-
- Kill any current inferior.
-
- NOTES
-
- Kills even attached inferiors. Presumably the user has already
- been prompted that the inferior is an attached one rather than
- one started by gdb. (FIXME?)
-
- */
-
-static void
-procfs_kill_inferior ()
-{
- target_mourn_inferior ();
-}
-
-/*
-
- LOCAL FUNCTION
-
- unconditionally_kill_inferior - terminate the inferior
-
- SYNOPSIS
-
- static void unconditionally_kill_inferior (struct procinfo *)
-
- DESCRIPTION
-
- Kill the specified inferior.
-
- NOTE
-
- A possibly useful enhancement would be to first try sending
- the inferior a terminate signal, politely asking it to commit
- suicide, before we murder it (we could call that
- politely_kill_inferior()).
-
- */
-
-static void
-unconditionally_kill_inferior (pi)
- struct procinfo *pi;
-{
- int ppid;
- struct proc_ctl pctl;
-
- ppid = pi->prstatus.pr_ppid;
-
-#ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL
- /* Alpha OSF/1-3.x procfs needs a clear of the current signal
- before the PIOCKILL, otherwise it might generate a corrupted core
- file for the inferior. */
- ioctl (pi->ctl_fd, PIOCSSIG, NULL);
-#endif
-#ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
- /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal
- to kill the inferior, otherwise it might remain stopped with a
- pending SIGKILL.
- We do not check the result of the PIOCSSIG, the inferior might have
- died already. */
- {
- struct siginfo newsiginfo;
-
- memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
- newsiginfo.si_signo = SIGKILL;
- newsiginfo.si_code = 0;
- newsiginfo.si_errno = 0;
- newsiginfo.si_pid = getpid ();
- newsiginfo.si_uid = getuid ();
- ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo);
- }
-#else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
- procfs_write_pckill (pi);
-#endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
-
- close_proc_file (pi);
-
-/* Only wait() for our direct children. Our grandchildren zombies are killed
- by the death of their parents. */
-
- if (ppid == getpid ())
- wait ((int *) 0);
-}
-
-/*
-
- LOCAL FUNCTION
+ if (save && ret)
+ memcpy (save, ret, sizeof (gdb_sigset_t));
- procfs_xfer_memory -- copy data to or from inferior memory space
-
- SYNOPSIS
-
- int procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
- int dowrite, struct target_ops target)
-
- DESCRIPTION
-
- Copy LEN bytes to/from inferior's memory starting at MEMADDR
- from/to debugger memory starting at MYADDR. Copy from inferior
- if DOWRITE is zero or to inferior if DOWRITE is nonzero.
-
- Returns the length copied, which is either the LEN argument or
- zero. This xfer function does not do partial moves, since procfs_ops
- doesn't allow memory operations to cross below us in the target stack
- anyway.
-
- NOTES
-
- The /proc interface makes this an almost trivial task.
- */
-
-static int
-procfs_xfer_memory (memaddr, myaddr, len, dowrite, target)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
- int dowrite;
- struct target_ops *target; /* ignored */
-{
- int nbytes = 0;
- struct procinfo *pi;
-
- pi = current_procinfo;
-
- if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr)
- {
- if (dowrite)
- {
- nbytes = write (pi->as_fd, myaddr, len);
- }
- else
- {
- nbytes = read (pi->as_fd, myaddr, len);
- }
- if (nbytes < 0)
- {
- nbytes = 0;
- }
- }
- return (nbytes);
+ return ret;
}
-/*
-
- LOCAL FUNCTION
-
- procfs_store_registers -- copy register values back to inferior
-
- SYNOPSIS
-
- void procfs_store_registers (int regno)
-
- DESCRIPTION
-
- Store our current register values back into the inferior. If
- REGNO is -1 then store all the register, otherwise store just
- the value specified by REGNO.
-
- NOTES
-
- If we are storing only a single register, we first have to get all
- the current values from the process, overwrite the desired register
- in the gregset with the one we want from gdb's registers, and then
- send the whole set back to the process. For writing all the
- registers, all we have to do is generate the gregset and send it to
- the process.
-
- Also note that the process has to be stopped on an event of interest
- for this to work, which basically means that it has to have been
- run under the control of one of the other /proc ioctl calls and not
- ptrace. Since we don't use ptrace anyway, we don't worry about this
- fine point, but it is worth noting for future reference.
-
- Gdb is confused about what this function is supposed to return.
- Some versions return a value, others return nothing. Some are
- declared to return a value and actually return nothing. Gdb ignores
- anything returned. (FIXME)
-
- */
-
-static void
-procfs_store_registers (regno)
- int regno;
-{
- struct procinfo *pi;
-#ifdef PROCFS_USE_READ_WRITE
- struct greg_ctl greg;
- struct fpreg_ctl fpreg;
-#endif
-
- pi = current_procinfo;
-
-#ifdef PROCFS_USE_READ_WRITE
- if (regno != -1)
- {
- procfs_read_status (pi);
- memcpy ((char *) &greg.gregset,
- (char *) &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs,
- sizeof (gdb_gregset_t));
- }
- fill_gregset (&greg.gregset, regno);
- greg.cmd = PCSREG;
- write (pi->ctl_fd, &greg, sizeof (greg));
-#else /* PROCFS_USE_READ_WRITE */
- if (regno != -1)
- {
- ioctl (pi->ctl_fd, PIOCGREG, &pi->gregset.gregset);
- }
- fill_gregset (&pi->gregset.gregset, regno);
- ioctl (pi->ctl_fd, PIOCSREG, &pi->gregset.gregset);
-#endif /* PROCFS_USE_READ_WRITE */
-
-#if defined (FP0_REGNUM)
-
- /* Now repeat everything using the floating point register set, if the
- target has floating point hardware. Since we ignore the returned value,
- we'll never know whether it worked or not anyway. */
-
-#ifdef PROCFS_USE_READ_WRITE
- if (regno != -1)
- {
- procfs_read_status (pi);
- memcpy ((char *) &fpreg.fpregset,
- (char *) &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs,
- sizeof (gdb_fpregset_t));
- }
- fill_fpregset (&fpreg.fpregset, regno);
- fpreg.cmd = PCSFPREG;
- write (pi->ctl_fd, &fpreg, sizeof (fpreg));
-#else /* PROCFS_USE_READ_WRITE */
- if (regno != -1)
- {
- ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset.fpregset);
- }
- fill_fpregset (&pi->fpregset.fpregset, regno);
- ioctl (pi->ctl_fd, PIOCSFPREG, &pi->fpregset.fpregset);
-#endif /* PROCFS_USE_READ_WRITE */
-
-#endif /* FP0_REGNUM */
-
-}
-
-/*
-
- LOCAL FUNCTION
-
- init_procinfo - setup a procinfo struct and connect it to a process
-
- SYNOPSIS
-
- struct procinfo * init_procinfo (int pid)
-
- DESCRIPTION
-
- Allocate a procinfo structure, open the /proc file and then set up the
- set of signals and faults that are to be traced. Returns a pointer to
- the new procinfo structure.
-
- NOTES
-
- If proc_init_failed ever gets called, control returns to the command
- processing loop via the standard error handling code.
-
- */
-
-static struct procinfo *
-init_procinfo (pid, kill)
- int pid;
- int kill;
-{
- struct procinfo *pi = (struct procinfo *)
- xmalloc (sizeof (struct procinfo));
- struct sig_ctl sctl;
- struct flt_ctl fctl;
-
- memset ((char *) pi, 0, sizeof (*pi));
- if (!open_proc_file (pid, pi, O_RDWR, 1))
- proc_init_failed (pi, "can't open process file", kill);
-
- /* open_proc_file may modify pid. */
-
- pid = pi->pid;
-
- /* Add new process to process info list */
-
- pi->next = procinfo_list;
- procinfo_list = pi;
-
- add_fd (pi); /* Add to list for poll/select */
-
- /* Remember some things about the inferior that we will, or might, change
- so that we can restore them when we detach. */
-#ifdef UNIXWARE
- memcpy ((char *) &pi->saved_trace.sigset,
- (char *) &pi->prstatus.pr_sigtrace, sizeof (sigset_t));
- memcpy ((char *) &pi->saved_fltset.fltset,
- (char *) &pi->prstatus.pr_flttrace, sizeof (fltset_t));
- memcpy ((char *) &pi->saved_entryset.sysset,
- (char *) &pi->prstatus.pr_sysentry, sizeof (sysset_t));
- memcpy ((char *) &pi->saved_exitset.sysset,
- (char *) &pi->prstatus.pr_sysexit, sizeof (sysset_t));
-
- /* Set up trace and fault sets, as gdb expects them. */
-
- prfillset (&sctl.sigset);
- notice_signals (pi, &sctl);
- prfillset (&fctl.fltset);
- prdelset (&fctl.fltset, FLTPAGE);
-
-#else /* ! UNIXWARE */
- ioctl (pi->ctl_fd, PIOCGTRACE, &pi->saved_trace.sigset);
- ioctl (pi->ctl_fd, PIOCGHOLD, &pi->saved_sighold.sigset);
- ioctl (pi->ctl_fd, PIOCGFAULT, &pi->saved_fltset.fltset);
- ioctl (pi->ctl_fd, PIOCGENTRY, &pi->saved_entryset.sysset);
- ioctl (pi->ctl_fd, PIOCGEXIT, &pi->saved_exitset.sysset);
-
- /* Set up trace and fault sets, as gdb expects them. */
-
- memset ((char *) &pi->prrun, 0, sizeof (pi->prrun));
- prfillset (&pi->prrun.pr_trace);
- procfs_notice_signals (pid);
- prfillset (&pi->prrun.pr_fault);
- prdelset (&pi->prrun.pr_fault, FLTPAGE);
-#ifdef PROCFS_DONT_TRACE_FAULTS
- premptyset (&pi->prrun.pr_fault);
-#endif
-#endif /* UNIXWARE */
-
- if (!procfs_read_status (pi))
- proc_init_failed (pi, "procfs_read_status failed", kill);
-
- return pi;
-}
-
-/*
-
- LOCAL FUNCTION
-
- create_procinfo - initialize access to a /proc entry
-
- SYNOPSIS
-
- struct procinfo * create_procinfo (int pid)
-
- DESCRIPTION
-
- Allocate a procinfo structure, open the /proc file and then set up the
- set of signals and faults that are to be traced. Returns a pointer to
- the new procinfo structure.
-
- NOTES
-
- If proc_init_failed ever gets called, control returns to the command
- processing loop via the standard error handling code.
-
- */
-
-static struct procinfo *
-create_procinfo (pid)
- int pid;
-{
- struct procinfo *pi;
- struct sig_ctl sctl;
- struct flt_ctl fctl;
-
- pi = find_procinfo (pid, 1);
- if (pi != NULL)
- return pi; /* All done! It already exists */
-
- pi = init_procinfo (pid, 1);
-
-#ifndef UNIXWARE
-/* A bug in Solaris (2.5 at least) causes PIOCWSTOP to hang on LWPs that are
- already stopped, even if they all have PR_ASYNC set. */
- if (!(pi->prstatus.pr_flags & PR_STOPPED))
-#endif
- if (!procfs_write_pcwstop (pi))
- proc_init_failed (pi, "procfs_write_pcwstop failed", 1);
-
-#ifdef PROCFS_USE_READ_WRITE
- fctl.cmd = PCSFAULT;
- if (write (pi->ctl_fd, (char *) &fctl, sizeof (struct flt_ctl)) < 0)
- proc_init_failed (pi, "PCSFAULT failed", 1);
-#else
- if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->prrun.pr_fault) < 0)
- proc_init_failed (pi, "PIOCSFAULT failed", 1);
-#endif
-
- return pi;
-}
-
-/*
-
- LOCAL FUNCTION
-
- procfs_exit_handler - handle entry into the _exit syscall
-
- SYNOPSIS
-
- int procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp)
-
- DESCRIPTION
-
- This routine is called when an inferior process enters the _exit()
- system call. It continues the process, and then collects the exit
- status and pid which are returned in *statvalp and *rtnvalp. After
- that it returns non-zero to indicate that procfs_wait should wake up.
-
- NOTES
- There is probably a better way to do this.
-
- */
-
-static int
-procfs_exit_handler (pi, syscall_num, why, rtnvalp, statvalp)
- struct procinfo *pi;
- int syscall_num;
- int why;
- int *rtnvalp;
- int *statvalp;
-{
- struct procinfo *temp_pi, *next_pi;
- struct proc_ctl pctl;
-
-#ifdef UNIXWARE
- pctl.cmd = PCRUN;
- pctl.data = PRCFAULT;
-#else
- pi->prrun.pr_flags = PRCFAULT;
-#endif
-
-#ifdef PROCFS_USE_READ_WRITE
- if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
-#else
- if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
-#endif
- perror_with_name (pi->pathname);
-
- if (attach_flag)
- {
- /* Claim it exited (don't call wait). */
- if (info_verbose)
- printf_filtered ("(attached process has exited)\n");
- *statvalp = 0;
- *rtnvalp = inferior_pid;
- }
- else
- {
- *rtnvalp = wait (statvalp);
- if (*rtnvalp >= 0)
- *rtnvalp = pi->pid;
- }
-
- /* Close ALL open proc file handles,
- except the one that called SYS_exit. */
- for (temp_pi = procinfo_list; temp_pi; temp_pi = next_pi)
- {
- next_pi = temp_pi->next;
- if (temp_pi == pi)
- continue; /* Handled below */
- close_proc_file (temp_pi);
- }
- return 1;
-}
-
-/*
-
- LOCAL FUNCTION
-
- procfs_exec_handler - handle exit from the exec family of syscalls
-
- SYNOPSIS
-
- int procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp)
-
- DESCRIPTION
-
- This routine is called when an inferior process is about to finish any
- of the exec() family of system calls. It pretends that we got a
- SIGTRAP (for compatibility with ptrace behavior), and returns non-zero
- to tell procfs_wait to wake up.
-
- NOTES
- This need for compatibility with ptrace is questionable. In the
- future, it shouldn't be necessary.
-
- */
-
-static int
-procfs_exec_handler (pi, syscall_num, why, rtnvalp, statvalp)
- struct procinfo *pi;
- int syscall_num;
- int why;
- int *rtnvalp;
- int *statvalp;
-{
- *statvalp = (SIGTRAP << 8) | 0177;
-
- return 1;
-}
-
-#if defined(SYS_sproc) && !defined(UNIXWARE)
-/* IRIX lwp creation system call */
-
-/*
-
- LOCAL FUNCTION
-
- procfs_sproc_handler - handle exit from the sproc syscall
-
- SYNOPSIS
-
- int procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp)
-
- DESCRIPTION
-
- This routine is called when an inferior process is about to finish an
- sproc() system call. This is the system call that IRIX uses to create
- a lightweight process. When the target process gets this event, we can
- look at rval1 to find the new child processes ID, and create a new
- procinfo struct from that.
-
- After that, it pretends that we got a SIGTRAP, and returns non-zero
- to tell procfs_wait to wake up. Subsequently, wait_for_inferior gets
- woken up, sees the new process and continues it.
-
- NOTES
- We actually never see the child exiting from sproc because we will
- shortly stop the child with PIOCSTOP, which is then registered as the
- event of interest.
- */
-
-static int
-procfs_sproc_handler (pi, syscall_num, why, rtnvalp, statvalp)
- struct procinfo *pi;
- int syscall_num;
- int why;
- int *rtnvalp;
- int *statvalp;
-{
-/* We've just detected the completion of an sproc system call. Now we need to
- setup a procinfo struct for this thread, and notify the thread system of the
- new arrival. */
-
-/* If sproc failed, then nothing interesting happened. Continue the process
- and go back to sleep. */
-
- if (pi->prstatus.pr_errno != 0)
- {
- pi->prrun.pr_flags &= PRSTEP;
- pi->prrun.pr_flags |= PRCFAULT;
-
- if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
- perror_with_name (pi->pathname);
-
- return 0;
- }
-
- /* At this point, the new thread is stopped at it's first instruction, and
- the parent is stopped at the exit from sproc. */
-
- /* Notify the caller of the arrival of a new thread. */
- create_procinfo (pi->prstatus.pr_rval1);
-
- *rtnvalp = pi->prstatus.pr_rval1;
- *statvalp = (SIGTRAP << 8) | 0177;
-
- return 1;
-}
-
-/*
-
- LOCAL FUNCTION
-
- procfs_fork_handler - handle exit from the fork syscall
-
- SYNOPSIS
-
- int procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp)
-
- DESCRIPTION
-
- This routine is called when an inferior process is about to finish a
- fork() system call. We will open up the new process, and then close
- it, which releases it from the clutches of the debugger.
-
- After that, we continue the target process as though nothing had
- happened.
-
- NOTES
- This is necessary for IRIX because we have to set PR_FORK in order
- to catch the creation of lwps (via sproc()). When an actual fork
- occurs, it becomes necessary to reset the forks debugger flags and
- continue it because we can't hack multiple processes yet.
+/*
+ * Function: proc_trace_signal
+ *
+ * Add 'signo' to the set of signals that are traced.
+ * Returns non-zero for success, zero for failure.
*/
-static int
-procfs_fork_handler (pi, syscall_num, why, rtnvalp, statvalp)
- struct procinfo *pi;
- int syscall_num;
- int why;
- int *rtnvalp;
- int *statvalp;
+int
+proc_trace_signal (procinfo *pi, int signo)
{
- struct procinfo *pitemp;
-
-/* At this point, we've detected the completion of a fork (or vfork) call in
- our child. The grandchild is also stopped because we set inherit-on-fork
- earlier. (Note that nobody has the grandchilds' /proc file open at this
- point.) We will release the grandchild from the debugger by opening it's
- /proc file and then closing it. Since run-on-last-close is set, the
- grandchild continues on its' merry way. */
+ gdb_sigset_t temp;
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
- pitemp = create_procinfo (pi->prstatus.pr_rval1);
- if (pitemp)
- close_proc_file (pitemp);
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
- if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
- perror_with_name (pi->pathname);
+ if (pi)
+ {
+ if (proc_get_traced_signals (pi, &temp))
+ {
+ praddset (&temp, signo);
+ return proc_set_traced_signals (pi, &temp);
+ }
+ }
- return 0;
+ return 0; /* failure */
}
-#endif /* SYS_sproc && !UNIXWARE */
/*
-
- LOCAL FUNCTION
-
- procfs_set_inferior_syscall_traps - setup the syscall traps
-
- SYNOPSIS
-
- void procfs_set_inferior_syscall_traps (struct procinfo *pip)
-
- DESCRIPTION
-
- Called for each "procinfo" (process, thread, or LWP) in the
- inferior, to register for notification of and handlers for
- syscall traps in the inferior.
-
+ * Function: proc_ignore_signal
+ *
+ * Remove 'signo' from the set of signals that are traced.
+ * Returns non-zero for success, zero for failure.
*/
-static void
-procfs_set_inferior_syscall_traps (pip)
- struct procinfo *pip;
+int
+proc_ignore_signal (procinfo *pi, int signo)
{
- procfs_set_syscall_trap (pip, SYS_exit, PROCFS_SYSCALL_ENTRY,
- procfs_exit_handler);
-
-#ifndef PRFS_STOPEXEC
-#ifdef SYS_exec
- procfs_set_syscall_trap (pip, SYS_exec, PROCFS_SYSCALL_EXIT,
- procfs_exec_handler);
-#endif
-#ifdef SYS_execv
- procfs_set_syscall_trap (pip, SYS_execv, PROCFS_SYSCALL_EXIT,
- procfs_exec_handler);
-#endif
-#ifdef SYS_execve
- procfs_set_syscall_trap (pip, SYS_execve, PROCFS_SYSCALL_EXIT,
- procfs_exec_handler);
-#endif
-#endif /* PRFS_STOPEXEC */
+ gdb_sigset_t temp;
- /* Setup traps on exit from sproc() */
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
-#ifdef SYS_sproc
- procfs_set_syscall_trap (pip, SYS_sproc, PROCFS_SYSCALL_EXIT,
- procfs_sproc_handler);
- procfs_set_syscall_trap (pip, SYS_fork, PROCFS_SYSCALL_EXIT,
- procfs_fork_handler);
-#ifdef SYS_vfork
- procfs_set_syscall_trap (pip, SYS_vfork, PROCFS_SYSCALL_EXIT,
- procfs_fork_handler);
-#endif
-/* Turn on inherit-on-fork flag so that all children of the target process
- start with tracing flags set. This allows us to trap lwp creation. Note
- that we also have to trap on fork and vfork in order to disable all tracing
- in the targets child processes. */
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
- modify_inherit_on_fork_flag (pip->ctl_fd, 1);
-#endif
+ if (pi)
+ {
+ if (proc_get_traced_signals (pi, &temp))
+ {
+ prdelset (&temp, signo);
+ return proc_set_traced_signals (pi, &temp);
+ }
+ }
-#ifdef SYS_lwp_create
- procfs_set_syscall_trap (pip, SYS_lwp_create, PROCFS_SYSCALL_EXIT,
- procfs_lwp_creation_handler);
-#endif
+ return 0; /* failure */
}
/*
-
- LOCAL FUNCTION
-
- procfs_init_inferior - initialize target vector and access to a
- /proc entry
-
- SYNOPSIS
-
- void procfs_init_inferior (int pid)
-
- DESCRIPTION
-
- When gdb starts an inferior, this function is called in the parent
- process immediately after the fork. It waits for the child to stop
- on the return from the exec system call (the child itself takes care
- of ensuring that this is set up), then sets up the set of signals
- and faults that are to be traced. Returns the pid, which may have had
- the thread-id added to it.
-
- NOTES
-
- If proc_init_failed ever gets called, control returns to the command
- processing loop via the standard error handling code.
-
+ * Function: proc_get_traced_faults
+ *
+ * returns the set of hardware faults that are traced /debugged.
+ * Will also copy the faultset if 'save' is non-zero.
*/
-static void
-procfs_init_inferior (pid)
- int pid;
+fltset_t *
+proc_get_traced_faults (procinfo *pi, fltset_t *save)
{
- struct procinfo *pip;
-
- push_target (&procfs_ops);
-
- pip = create_procinfo (pid);
-
- procfs_set_inferior_syscall_traps (pip);
+ fltset_t *ret = NULL;
- /* create_procinfo may change the pid, so we have to update inferior_pid
- here before calling other gdb routines that need the right pid. */
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
- pid = pip->pid;
- inferior_pid = pid;
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
- add_thread (pip->pid); /* Setup initial thread */
+#ifdef NEW_PROC_API
+ if (!pi->status_valid)
+ if (!proc_get_status (pi))
+ return NULL;
-#ifdef START_INFERIOR_TRAPS_EXPECTED
- startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
+ ret = &pi->prstatus.pr_flttrace;
#else
- /* One trap to exec the shell, one to exec the program being debugged. */
- startup_inferior (2);
+ {
+ static fltset_t flttrace;
+
+ if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0)
+ ret = &flttrace;
+ }
#endif
+ if (save && ret)
+ memcpy (save, ret, sizeof (fltset_t));
+
+ return ret;
}
/*
-
- GLOBAL FUNCTION
-
- procfs_notice_signals
-
- SYNOPSIS
-
- static void procfs_notice_signals (int pid);
-
- DESCRIPTION
-
- When the user changes the state of gdb's signal handling via the
- "handle" command, this function gets called to see if any change
- in the /proc interface is required. It is also called internally
- by other /proc interface functions to initialize the state of
- the traced signal set.
-
- One thing it does is that signals for which the state is "nostop",
- "noprint", and "pass", have their trace bits reset in the pr_trace
- field, so that they are no longer traced. This allows them to be
- delivered directly to the inferior without the debugger ever being
- involved.
+ * Function: proc_get_traced_sysentry
+ *
+ * returns the set of syscalls that are traced /debugged on entry.
+ * Will also copy the syscall set if 'save' is non-zero.
*/
-static void
-procfs_notice_signals (pid)
- int pid;
+sysset_t *
+proc_get_traced_sysentry (procinfo *pi, sysset_t *save)
{
- struct procinfo *pi;
- struct sig_ctl sctl;
-
- pi = find_procinfo (pid, 0);
-
-#ifndef HAVE_PRRUN_T
- premptyset (&sctl.sigset);
-#else
- sctl.sigset = pi->prrun.pr_trace;
-#endif
-
- notice_signals (pi, &sctl);
-
-#ifdef HAVE_PRRUN_T
- pi->prrun.pr_trace = sctl.sigset;
-#endif
-}
+ sysset_t *ret = NULL;
+
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
+
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
+
+#ifdef NEW_PROC_API
+ if (!pi->status_valid)
+ if (!proc_get_status (pi))
+ return NULL;
+
+#ifndef DYNAMIC_SYSCALLS
+ ret = &pi->prstatus.pr_sysentry;
+#else /* DYNAMIC_SYSCALLS */
+ {
+ static sysset_t *sysentry;
+ size_t size;
+
+ if (!sysentry)
+ sysentry = sysset_t_alloc (pi);
+ ret = sysentry;
+ if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0)
+ return NULL;
+ if (pi->prstatus.pr_sysentry_offset == 0)
+ {
+ gdb_premptysysset (sysentry);
+ }
+ else
+ {
+ int rsize;
+
+ if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset,
+ SEEK_SET)
+ != (off_t) pi->prstatus.pr_sysentry_offset)
+ return NULL;
+ size = sysset_t_size (pi);
+ gdb_premptysysset (sysentry);
+ rsize = read (pi->status_fd, sysentry, size);
+ if (rsize < 0)
+ return NULL;
+ }
+ }
+#endif /* DYNAMIC_SYSCALLS */
+#else /* !NEW_PROC_API */
+ {
+ static sysset_t sysentry;
-static void
-notice_signals (pi, sctl)
- struct procinfo *pi;
- struct sig_ctl *sctl;
-{
- int signo;
+ if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0)
+ ret = &sysentry;
+ }
+#endif /* NEW_PROC_API */
+ if (save && ret)
+ memcpy (save, ret, sysset_t_size (pi));
- for (signo = 0; signo < NSIG; signo++)
- {
- if (signal_stop_state (target_signal_from_host (signo)) == 0 &&
- signal_print_state (target_signal_from_host (signo)) == 0 &&
- signal_pass_state (target_signal_from_host (signo)) == 1)
- {
- prdelset (&sctl->sigset, signo);
- }
- else
- {
- praddset (&sctl->sigset, signo);
- }
- }
-#ifdef PROCFS_USE_READ_WRITE
- sctl->cmd = PCSTRACE;
- if (write (pi->ctl_fd, (char *) sctl, sizeof (struct sig_ctl)) < 0)
-#else
- if (ioctl (pi->ctl_fd, PIOCSTRACE, &sctl->sigset))
-#endif
- {
- print_sys_errmsg ("PIOCSTRACE failed", errno);
- }
+ return ret;
}
/*
-
- LOCAL FUNCTION
-
- proc_set_exec_trap -- arrange for exec'd child to halt at startup
-
- SYNOPSIS
-
- void proc_set_exec_trap (void)
-
- DESCRIPTION
-
- This function is called in the child process when starting up
- an inferior, prior to doing the exec of the actual inferior.
- It sets the child process's exitset to make exit from the exec
- system call an event of interest to stop on, and then simply
- returns. The child does the exec, the system call returns, and
- the child stops at the first instruction, ready for the gdb
- parent process to take control of it.
-
- NOTE
-
- We need to use all local variables since the child may be sharing
- it's data space with the parent, if vfork was used rather than
- fork.
-
- Also note that we want to turn off the inherit-on-fork flag in
- the child process so that any grand-children start with all
- tracing flags cleared.
+ * Function: proc_get_traced_sysexit
+ *
+ * returns the set of syscalls that are traced /debugged on exit.
+ * Will also copy the syscall set if 'save' is non-zero.
*/
-static void
-proc_set_exec_trap ()
+sysset_t *
+proc_get_traced_sysexit (procinfo *pi, sysset_t *save)
{
- struct sys_ctl exitset;
- struct sys_ctl entryset;
- char procname[MAX_PROC_NAME_SIZE];
- int fd;
-
- sprintf (procname, CTL_PROC_NAME_FMT, getpid ());
-#ifdef UNIXWARE
- if ((fd = open (procname, O_WRONLY)) < 0)
-#else
- if ((fd = open (procname, O_RDWR)) < 0)
-#endif
- {
- perror (procname);
- gdb_flush (gdb_stderr);
- _exit (127);
- }
- premptyset (&exitset.sysset);
- premptyset (&entryset.sysset);
-
-#ifdef PRFS_STOPEXEC
- /* Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
- exits from exec system calls because of the user level loader. */
+ sysset_t * ret = NULL;
+
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
+
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
+
+#ifdef NEW_PROC_API
+ if (!pi->status_valid)
+ if (!proc_get_status (pi))
+ return NULL;
+
+#ifndef DYNAMIC_SYSCALLS
+ ret = &pi->prstatus.pr_sysexit;
+#else /* DYNAMIC_SYSCALLS */
{
- int prfs_flags;
-
- if (ioctl (fd, PIOCGSPCACT, &prfs_flags) < 0)
+ static sysset_t *sysexit;
+ size_t size;
+
+ if (!sysexit)
+ sysexit = sysset_t_alloc (pi);
+ ret = sysexit;
+ if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0)
+ return NULL;
+ if (pi->prstatus.pr_sysexit_offset == 0)
{
- perror (procname);
- gdb_flush (gdb_stderr);
- _exit (127);
+ gdb_premptysysset (sysexit);
}
- prfs_flags |= PRFS_STOPEXEC;
- if (ioctl (fd, PIOCSSPCACT, &prfs_flags) < 0)
+ else
{
- perror (procname);
- gdb_flush (gdb_stderr);
- _exit (127);
+ int rsize;
+
+ if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, SEEK_SET)
+ != (off_t) pi->prstatus.pr_sysexit_offset)
+ return NULL;
+ size = sysset_t_size (pi);
+ gdb_premptysysset (sysexit);
+ rsize = read (pi->status_fd, sysexit, size);
+ if (rsize < 0)
+ return NULL;
}
}
-#else /* PRFS_STOPEXEC */
- /* GW: Rationale...
- Not all systems with /proc have all the exec* syscalls with the same
- names. On the SGI, for example, there is no SYS_exec, but there
- *is* a SYS_execv. So, we try to account for that. */
-
-#ifdef SYS_exec
- praddset (&exitset.sysset, SYS_exec);
-#endif
-#ifdef SYS_execve
- praddset (&exitset.sysset, SYS_execve);
-#endif
-#ifdef SYS_execv
- praddset (&exitset.sysset, SYS_execv);
-#endif
-
-#ifdef PROCFS_USE_READ_WRITE
- exitset.cmd = PCSEXIT;
- if (write (fd, (char *) &exitset, sizeof (struct sys_ctl)) < 0)
+#endif /* DYNAMIC_SYSCALLS */
#else
- if (ioctl (fd, PIOCSEXIT, &exitset.sysset) < 0)
-#endif
- {
- perror (procname);
- gdb_flush (gdb_stderr);
- _exit (127);
- }
-#endif /* PRFS_STOPEXEC */
-
- praddset (&entryset.sysset, SYS_exit);
+ {
+ static sysset_t sysexit;
-#ifdef PROCFS_USE_READ_WRITE
- entryset.cmd = PCSENTRY;
- if (write (fd, (char *) &entryset, sizeof (struct sys_ctl)) < 0)
-#else
- if (ioctl (fd, PIOCSENTRY, &entryset.sysset) < 0)
+ if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0)
+ ret = &sysexit;
+ }
#endif
- {
- perror (procname);
- gdb_flush (gdb_stderr);
- _exit (126);
- }
+ if (save && ret)
+ memcpy (save, ret, sysset_t_size (pi));
- /* Turn off inherit-on-fork flag so that all grand-children of gdb
- start with tracing flags cleared. */
-
- modify_inherit_on_fork_flag (fd, 0);
-
- /* Turn on run-on-last-close flag so that this process will not hang
- if GDB goes away for some reason. */
-
- modify_run_on_last_close_flag (fd, 1);
-
-#ifndef UNIXWARE /* since this is a solaris-ism, we don't want it */
- /* NOTE: revisit when doing thread support for UW */
-#ifdef PR_ASYNC
- {
- long pr_flags;
- struct proc_ctl pctl;
-
-/* Solaris needs this to make procfs treat all threads seperately. Without
- this, all threads halt whenever something happens to any thread. Since
- GDB wants to control all this itself, it needs to set PR_ASYNC. */
-
- pr_flags = PR_ASYNC;
-#ifdef PROCFS_USE_READ_WRITE
- pctl.cmd = PCSET;
- pctl.data = PR_FORK | PR_ASYNC;
- write (fd, (char *) &pctl, sizeof (struct proc_ctl));
-#else
- ioctl (fd, PIOCSET, &pr_flags);
-#endif
- }
-#endif /* PR_ASYNC */
-#endif /* !UNIXWARE */
+ return ret;
}
/*
-
- GLOBAL FUNCTION
-
- proc_iterate_over_mappings -- call function for every mapped space
-
- SYNOPSIS
-
- int proc_iterate_over_mappings (int (*func)())
-
- DESCRIPTION
-
- Given a pointer to a function, call that function for every
- mapped address space, passing it an open file descriptor for
- the file corresponding to that mapped address space (if any)
- and the base address of the mapped space. Quit when we hit
- the end of the mappings or the function returns nonzero.
+ * Function: proc_clear_current_fault
+ *
+ * The current fault (if any) is cleared; the associated signal
+ * will not be sent to the process or LWP when it resumes.
+ * Returns non-zero for success, zero for failure.
*/
-#ifdef UNIXWARE
-int
-proc_iterate_over_mappings (func)
- int (*func) PARAMS ((int, CORE_ADDR));
-{
- int nmap;
- int fd;
- int funcstat = 0;
- prmap_t *prmaps;
- prmap_t *prmap;
- struct procinfo *pi;
- struct stat sbuf;
-
- pi = current_procinfo;
-
- if (fstat (pi->map_fd, &sbuf) < 0)
- return 0;
-
- nmap = sbuf.st_size / sizeof (prmap_t);
- prmaps = (prmap_t *) alloca (nmap * sizeof (prmap_t));
- if ((lseek (pi->map_fd, 0, SEEK_SET) == 0) &&
- (read (pi->map_fd, (char *) prmaps, nmap * sizeof (prmap_t)) ==
- (nmap * sizeof (prmap_t))))
- {
- int i = 0;
- for (prmap = prmaps; i < nmap && funcstat == 0; ++prmap, ++i)
- {
- char name[sizeof ("/proc/1234567890/object") +
- sizeof (prmap->pr_mapname)];
- sprintf (name, "/proc/%d/object/%s", pi->pid, prmap->pr_mapname);
- if ((fd = open (name, O_RDONLY)) == -1)
- {
- funcstat = 1;
- break;
- }
- funcstat = (*func) (fd, (CORE_ADDR) prmap->pr_vaddr);
- close (fd);
- }
- }
- return (funcstat);
-}
-#else /* UNIXWARE */
int
-proc_iterate_over_mappings (func)
- int (*func) PARAMS ((int, CORE_ADDR));
+proc_clear_current_fault (procinfo *pi)
{
- int nmap;
- int fd;
- int funcstat = 0;
- struct prmap *prmaps;
- struct prmap *prmap;
- struct procinfo *pi;
-
- pi = current_procinfo;
-
- if (ioctl (pi->map_fd, PIOCNMAP, &nmap) == 0)
- {
- prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
- if (ioctl (pi->map_fd, PIOCMAP, prmaps) == 0)
- {
- for (prmap = prmaps; prmap->pr_size && funcstat == 0; ++prmap)
- {
- fd = proc_address_to_fd (pi, (CORE_ADDR) prmap->pr_vaddr, 0);
- funcstat = (*func) (fd, (CORE_ADDR) prmap->pr_vaddr);
- close (fd);
- }
- }
- }
- return (funcstat);
-}
-#endif /* UNIXWARE */
+ int win;
-#if 0 /* Currently unused */
-/*
-
- GLOBAL FUNCTION
-
- proc_base_address -- find base address for segment containing address
-
- SYNOPSIS
-
- CORE_ADDR proc_base_address (CORE_ADDR addr)
-
- DESCRIPTION
-
- Given an address of a location in the inferior, find and return
- the base address of the mapped segment containing that address.
-
- This is used for example, by the shared library support code,
- where we have the pc value for some location in the shared library
- where we are stopped, and need to know the base address of the
- segment containing that address.
- */
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
-CORE_ADDR
-proc_base_address (addr)
- CORE_ADDR addr;
-{
- int nmap;
- struct prmap *prmaps;
- struct prmap *prmap;
- CORE_ADDR baseaddr = 0;
- struct procinfo *pi;
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
- pi = current_procinfo;
+#ifdef NEW_PROC_API
+ {
+ procfs_ctl_t cmd = PCCFAULT;
+ win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd));
+ }
+#else
+ win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0);
+#endif
- if (ioctl (pi->map_fd, PIOCNMAP, &nmap) == 0)
- {
- prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
- if (ioctl (pi->map_fd, PIOCMAP, prmaps) == 0)
- {
- for (prmap = prmaps; prmap->pr_size; ++prmap)
- {
- if ((prmap->pr_vaddr <= (caddr_t) addr) &&
- (prmap->pr_vaddr + prmap->pr_size > (caddr_t) addr))
- {
- baseaddr = (CORE_ADDR) prmap->pr_vaddr;
- break;
- }
- }
- }
- }
- return (baseaddr);
+ return win;
}
-#endif /* 0 */
-
-#ifndef UNIXWARE
/*
-
- LOCAL FUNCTION
-
- proc_address_to_fd -- return open fd for file mapped to address
-
- SYNOPSIS
-
- int proc_address_to_fd (struct procinfo *pi, CORE_ADDR addr, complain)
-
- DESCRIPTION
-
- Given an address in the current inferior's address space, use the
- /proc interface to find an open file descriptor for the file that
- this address was mapped in from. Return -1 if there is no current
- inferior. Print a warning message if there is an inferior but
- the address corresponds to no file (IE a bogus address).
-
+ * Function: proc_set_current_signal
+ *
+ * Set the "current signal" that will be delivered next to the process.
+ * NOTE: semantics are different from those of KILL.
+ * This signal will be delivered to the process or LWP
+ * immediately when it is resumed (even if the signal is held/blocked);
+ * it will NOT immediately cause another event of interest, and will NOT
+ * first trap back to the debugger.
+ *
+ * Returns non-zero for success, zero for failure.
*/
-static int
-proc_address_to_fd (pi, addr, complain)
- struct procinfo *pi;
- CORE_ADDR addr;
- int complain;
-{
- int fd = -1;
-
- if ((fd = ioctl (pi->ctl_fd, PIOCOPENM, (caddr_t *) & addr)) < 0)
- {
- if (complain)
- {
- print_sys_errmsg (pi->pathname, errno);
- warning ("can't find mapped file for address 0x%x", addr);
- }
- }
- return (fd);
-}
-#endif /* !UNIXWARE */
-
-/* Attach to process PID, then initialize for debugging it
- and wait for the trace-trap that results from attaching. */
-
-static void
-procfs_attach (args, from_tty)
- char *args;
- int from_tty;
+int
+proc_set_current_signal (procinfo *pi, int signo)
{
- char *exec_file;
- int pid;
+ int win;
+ struct {
+ procfs_ctl_t cmd;
+ /* Use char array to avoid alignment issues. */
+ char sinfo[sizeof (gdb_siginfo_t)];
+ } arg;
+ gdb_siginfo_t *mysinfo;
+ ptid_t wait_ptid;
+ struct target_waitstatus wait_status;
+
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
+
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
- if (!args)
- error_no_arg ("process-id to attach");
-
- pid = atoi (args);
-
- if (pid == getpid ()) /* Trying to masturbate? */
- error ("I refuse to debug myself!");
-
- if (from_tty)
- {
- exec_file = (char *) get_exec_file (0);
-
- if (exec_file)
- printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, target_pid_to_str (pid));
- else
- printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid));
-
- gdb_flush (gdb_stdout);
+#ifdef PROCFS_DONT_PIOCSSIG_CURSIG
+ /* With Alpha OSF/1 procfs, the kernel gets really confused if it
+ * receives a PIOCSSIG with a signal identical to the current signal,
+ * it messes up the current signal. Work around the kernel bug.
+ */
+ if (signo > 0 &&
+ signo == proc_cursig (pi))
+ return 1; /* I assume this is a success? */
+#endif
+
+ /* The pointer is just a type alias. */
+ mysinfo = (gdb_siginfo_t *) &arg.sinfo;
+ get_last_target_status (&wait_ptid, &wait_status);
+ if (ptid_equal (wait_ptid, inferior_ptid)
+ && wait_status.kind == TARGET_WAITKIND_STOPPED
+ && wait_status.value.sig == target_signal_from_host (signo)
+ && proc_get_status (pi)
+#ifdef NEW_PROC_API
+ && pi->prstatus.pr_lwp.pr_info.si_signo == signo
+#else
+ && pi->prstatus.pr_info.si_signo == signo
+#endif
+ )
+ /* Use the siginfo associated with the signal being
+ redelivered. */
+#ifdef NEW_PROC_API
+ memcpy (mysinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (gdb_siginfo_t));
+#else
+ memcpy (mysinfo, &pi->prstatus.pr_info, sizeof (gdb_siginfo_t));
+#endif
+ else
+ {
+ mysinfo->si_signo = signo;
+ mysinfo->si_code = 0;
+ mysinfo->si_pid = getpid (); /* ?why? */
+ mysinfo->si_uid = getuid (); /* ?why? */
}
- inferior_pid = pid = do_attach (pid);
- push_target (&procfs_ops);
-}
+#ifdef NEW_PROC_API
+ arg.cmd = PCSSIG;
+ win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
+#else
+ win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0);
+#endif
+ return win;
+}
-/* Take a program previously attached to and detaches it.
- The program resumes execution and will no longer stop
- on signals, etc. We'd better not have left any breakpoints
- in the program or it'll die when it hits one. For this
- to work, it may be necessary for the process to have been
- previously attached. It *might* work if the program was
- started via the normal ptrace (PTRACE_TRACEME). */
+/*
+ * Function: proc_clear_current_signal
+ *
+ * The current signal (if any) is cleared, and
+ * is not sent to the process or LWP when it resumes.
+ * Returns non-zero for success, zero for failure.
+ */
-static void
-procfs_detach (args, from_tty)
- char *args;
- int from_tty;
+int
+proc_clear_current_signal (procinfo *pi)
{
- int siggnal = 0;
+ int win;
- if (from_tty)
- {
- char *exec_file = get_exec_file (0);
- if (exec_file == 0)
- exec_file = "";
- printf_unfiltered ("Detaching from program: %s %s\n",
- exec_file, target_pid_to_str (inferior_pid));
- gdb_flush (gdb_stdout);
- }
- if (args)
- siggnal = atoi (args);
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
+
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
+
+#ifdef NEW_PROC_API
+ {
+ struct {
+ procfs_ctl_t cmd;
+ /* Use char array to avoid alignment issues. */
+ char sinfo[sizeof (gdb_siginfo_t)];
+ } arg;
+ gdb_siginfo_t *mysinfo;
+
+ arg.cmd = PCSSIG;
+ /* The pointer is just a type alias. */
+ mysinfo = (gdb_siginfo_t *) &arg.sinfo;
+ mysinfo->si_signo = 0;
+ mysinfo->si_code = 0;
+ mysinfo->si_errno = 0;
+ mysinfo->si_pid = getpid (); /* ?why? */
+ mysinfo->si_uid = getuid (); /* ?why? */
+
+ win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
+ }
+#else
+ win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0);
+#endif
- do_detach (siggnal);
- inferior_pid = 0;
- unpush_target (&procfs_ops); /* Pop out of handling an inferior */
+ return win;
}
-/* Get ready to modify the registers array. On machines which store
- individual registers, this doesn't need to do anything. On machines
- which store all the registers in one fell swoop, this makes sure
- that registers contains all the registers from the program being
- debugged. */
+/* Return the general-purpose registers for the process or LWP
+ corresponding to PI. Upon failure, return NULL. */
-static void
-procfs_prepare_to_store ()
+gdb_gregset_t *
+proc_get_gregs (procinfo *pi)
{
-#ifdef CHILD_PREPARE_TO_STORE
- CHILD_PREPARE_TO_STORE ();
+ if (!pi->status_valid || !pi->gregs_valid)
+ if (!proc_get_status (pi))
+ return NULL;
+
+ /* OK, sorry about the ifdef's. There's three cases instead of two,
+ because in this case Unixware and Solaris/RW differ. */
+
+#ifdef NEW_PROC_API
+# ifdef UNIXWARE /* FIXME: Should be autoconfigured. */
+ return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs;
+# else
+ return &pi->prstatus.pr_lwp.pr_reg;
+# endif
+#else
+ return &pi->prstatus.pr_reg;
#endif
}
-/* Print status information about what we're accessing. */
+/* Return the general-purpose registers for the process or LWP
+ corresponding to PI. Upon failure, return NULL. */
-static void
-procfs_files_info (ignore)
- struct target_ops *ignore;
+gdb_fpregset_t *
+proc_get_fpregs (procinfo *pi)
{
- printf_unfiltered ("\tUsing the running image of %s %s via /proc.\n",
- attach_flag ? "attached" : "child", target_pid_to_str (inferior_pid));
+#ifdef NEW_PROC_API
+ if (!pi->status_valid || !pi->fpregs_valid)
+ if (!proc_get_status (pi))
+ return NULL;
+
+# ifdef UNIXWARE /* FIXME: Should be autoconfigured. */
+ return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs;
+# else
+ return &pi->prstatus.pr_lwp.pr_fpreg;
+# endif
+
+#else /* not NEW_PROC_API */
+ if (pi->fpregs_valid)
+ return &pi->fpregset; /* Already got 'em. */
+ else
+ {
+ if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0)
+ {
+ return NULL;
+ }
+ else
+ {
+# ifdef PIOCTGFPREG
+ struct {
+ long pr_count;
+ tid_t pr_error_thread;
+ tfpregset_t thread_1;
+ } thread_fpregs;
+
+ thread_fpregs.pr_count = 1;
+ thread_fpregs.thread_1.tid = pi->tid;
+
+ if (pi->tid == 0
+ && ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0)
+ {
+ pi->fpregs_valid = 1;
+ return &pi->fpregset; /* Got 'em now! */
+ }
+ else if (pi->tid != 0
+ && ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0)
+ {
+ memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs,
+ sizeof (pi->fpregset));
+ pi->fpregs_valid = 1;
+ return &pi->fpregset; /* Got 'em now! */
+ }
+ else
+ {
+ return NULL;
+ }
+# else
+ if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0)
+ {
+ pi->fpregs_valid = 1;
+ return &pi->fpregset; /* Got 'em now! */
+ }
+ else
+ {
+ return NULL;
+ }
+# endif
+ }
+ }
+#endif /* NEW_PROC_API */
}
-/* ARGSUSED */
-static void
-procfs_open (arg, from_tty)
- char *arg;
- int from_tty;
-{
- error ("Use the \"run\" command to start a Unix child process.");
-}
+/* Write the general-purpose registers back to the process or LWP
+ corresponding to PI. Return non-zero for success, zero for
+ failure. */
-/*
+int
+proc_set_gregs (procinfo *pi)
+{
+ gdb_gregset_t *gregs;
+ int win;
- LOCAL FUNCTION
+ gregs = proc_get_gregs (pi);
+ if (gregs == NULL)
+ return 0; /* proc_get_regs has already warned. */
- do_attach -- attach to an already existing process
+ if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0)
+ {
+ return 0;
+ }
+ else
+ {
+#ifdef NEW_PROC_API
+ struct {
+ procfs_ctl_t cmd;
+ /* Use char array to avoid alignment issues. */
+ char gregs[sizeof (gdb_gregset_t)];
+ } arg;
+
+ arg.cmd = PCSREG;
+ memcpy (&arg.gregs, gregs, sizeof (arg.gregs));
+ win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
+#else
+ win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0);
+#endif
+ }
- SYNOPSIS
+ /* Policy: writing the registers invalidates our cache. */
+ pi->gregs_valid = 0;
+ return win;
+}
- int do_attach (int pid)
+/* Write the floating-pointer registers back to the process or LWP
+ corresponding to PI. Return non-zero for success, zero for
+ failure. */
- DESCRIPTION
+int
+proc_set_fpregs (procinfo *pi)
+{
+ gdb_fpregset_t *fpregs;
+ int win;
- Attach to an already existing process with the specified process
- id. If the process is not already stopped, query whether to
- stop it or not.
+ fpregs = proc_get_fpregs (pi);
+ if (fpregs == NULL)
+ return 0; /* proc_get_fpregs has already warned. */
- NOTES
+ if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0)
+ {
+ return 0;
+ }
+ else
+ {
+#ifdef NEW_PROC_API
+ struct {
+ procfs_ctl_t cmd;
+ /* Use char array to avoid alignment issues. */
+ char fpregs[sizeof (gdb_fpregset_t)];
+ } arg;
+
+ arg.cmd = PCSFPREG;
+ memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs));
+ win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg));
+#else
+# ifdef PIOCTSFPREG
+ if (pi->tid == 0)
+ win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0);
+ else
+ {
+ struct {
+ long pr_count;
+ tid_t pr_error_thread;
+ tfpregset_t thread_1;
+ } thread_fpregs;
+
+ thread_fpregs.pr_count = 1;
+ thread_fpregs.thread_1.tid = pi->tid;
+ memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs,
+ sizeof (*fpregs));
+ win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0);
+ }
+# else
+ win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0);
+# endif
+#endif /* NEW_PROC_API */
+ }
- The option of stopping at attach time is specific to the /proc
- versions of gdb. Versions using ptrace force the attachee
- to stop. (I have changed this version to do so, too. All you
- have to do is "continue" to make it go on. -- gnu@cygnus.com)
+ /* Policy: writing the registers invalidates our cache. */
+ pi->fpregs_valid = 0;
+ return win;
+}
+/*
+ * Function: proc_kill
+ *
+ * Send a signal to the proc or lwp with the semantics of "kill()".
+ * Returns non-zero for success, zero for failure.
*/
-static int
-do_attach (pid)
- int pid;
+int
+proc_kill (procinfo *pi, int signo)
{
- struct procinfo *pi;
- struct sig_ctl sctl;
- struct flt_ctl fctl;
- int nlwp, *lwps;
+ int win;
- pi = init_procinfo (pid, 0);
+ /*
+ * We might conceivably apply this operation to an LWP, and
+ * the LWP's ctl file descriptor might not be open.
+ */
-#ifdef PIOCLWPIDS
- nlwp = pi->prstatus.pr_nlwp;
- lwps = alloca ((2 * nlwp + 2) * sizeof (id_t));
-
- if (ioctl (pi->ctl_fd, PIOCLWPIDS, lwps))
+ if (pi->ctl_fd == 0 &&
+ open_procinfo_files (pi, FD_CTL) == 0)
{
- print_sys_errmsg (pi->pathname, errno);
- error ("PIOCLWPIDS failed");
+ return 0;
}
-#else /* PIOCLWPIDS */
- nlwp = 1;
- lwps = alloca ((2 * nlwp + 2) * sizeof *lwps);
- lwps[0] = 0;
-#endif
- for (; nlwp > 0; nlwp--, lwps++)
+ else
{
- /* First one has already been created above. */
- if ((pi = find_procinfo ((*lwps << 16) | pid, 1)) == 0)
- pi = init_procinfo ((*lwps << 16) | pid, 0);
+#ifdef NEW_PROC_API
+ procfs_ctl_t cmd[2];
- if (THE_PR_LWP (pi->prstatus).pr_flags & (PR_STOPPED | PR_ISTOP))
- {
- pi->was_stopped = 1;
- }
- else
- {
- pi->was_stopped = 0;
- if (1 || query ("Process is currently running, stop it? "))
- {
- long cmd;
- /* Make it run again when we close it. */
- modify_run_on_last_close_flag (pi->ctl_fd, 1);
-#ifdef PROCFS_USE_READ_WRITE
- cmd = PCSTOP;
- if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
-#else
- if (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) < 0)
-#endif
- {
- print_sys_errmsg (pi->pathname, errno);
- close_proc_file (pi);
- error ("PIOCSTOP failed");
- }
-#ifdef UNIXWARE
- if (!procfs_read_status (pi))
- {
- print_sys_errmsg (pi->pathname, errno);
- close_proc_file (pi);
- error ("procfs_read_status failed");
- }
+ cmd[0] = PCKILL;
+ cmd[1] = signo;
+ win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd));
+#else /* ioctl method */
+ /* FIXME: do I need the Alpha OSF fixups present in
+ procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */
+ win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0);
#endif
- pi->nopass_next_sigstop = 1;
- }
- else
- {
- printf_unfiltered ("Ok, gdb will wait for %s to stop.\n",
- target_pid_to_str (pi->pid));
- }
- }
+ }
-#ifdef PROCFS_USE_READ_WRITE
- fctl.cmd = PCSFAULT;
- if (write (pi->ctl_fd, (char *) &fctl, sizeof (struct flt_ctl)) < 0)
- print_sys_errmsg ("PCSFAULT failed", errno);
-#else /* PROCFS_USE_READ_WRITE */
- if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->prrun.pr_fault))
- {
- print_sys_errmsg ("PIOCSFAULT failed", errno);
- }
- if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->prrun.pr_trace))
- {
- print_sys_errmsg ("PIOCSTRACE failed", errno);
- }
- add_thread (pi->pid);
- procfs_set_inferior_syscall_traps (pi);
-#endif /* PROCFS_USE_READ_WRITE */
- }
- attach_flag = 1;
- return (pi->pid);
+ return win;
}
/*
+ * Function: proc_parent_pid
+ *
+ * Find the pid of the process that started this one.
+ * Returns the parent process pid, or zero.
+ */
- LOCAL FUNCTION
-
- do_detach -- detach from an attached-to process
-
- SYNOPSIS
-
- void do_detach (int signal)
+int
+proc_parent_pid (procinfo *pi)
+{
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
+
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
+
+ if (!pi->status_valid)
+ if (!proc_get_status (pi))
+ return 0;
- DESCRIPTION
+ return pi->prstatus.pr_ppid;
+}
- Detach from the current attachee.
- If signal is non-zero, the attachee is started running again and sent
- the specified signal.
+/* Convert a target address (a.k.a. CORE_ADDR) into a host address
+ (a.k.a void pointer)! */
- If signal is zero and the attachee was not already stopped when we
- attached to it, then we make it runnable again when we detach.
+static void *
+procfs_address_to_host_pointer (CORE_ADDR addr)
+{
+ void *ptr;
- Otherwise, we query whether or not to make the attachee runnable
- again, since we may simply want to leave it in the state it was in
- when we attached.
+ gdb_assert (sizeof (ptr) == TYPE_LENGTH (builtin_type_void_data_ptr));
+ gdbarch_address_to_pointer (current_gdbarch, builtin_type_void_data_ptr,
+ &ptr, addr);
+ return ptr;
+}
- We report any problems, but do not consider them errors, since we
- MUST detach even if some things don't seem to go right. This may not
- be the ideal situation. (FIXME).
+/*
+ * Function: proc_set_watchpoint
+ *
*/
-static void
-do_detach (signal)
- int signal;
+int
+proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags)
{
- struct procinfo *pi;
-
- for (pi = procinfo_list; pi; pi = pi->next)
- {
- if (signal)
- {
- set_proc_siginfo (pi, signal);
- }
-#ifdef PROCFS_USE_READ_WRITE
- pi->saved_exitset.cmd = PCSEXIT;
- if (write (pi->ctl_fd, (char *) &pi->saved_exitset,
- sizeof (struct sys_ctl)) < 0)
+#if !defined (TARGET_HAS_HARDWARE_WATCHPOINTS)
+ return 0;
#else
- if (ioctl (pi->ctl_fd, PIOCSEXIT, &pi->saved_exitset.sysset) < 0)
-#endif
- {
- print_sys_errmsg (pi->pathname, errno);
- printf_unfiltered ("PIOCSEXIT failed.\n");
- }
-#ifdef PROCFS_USE_READ_WRITE
- pi->saved_entryset.cmd = PCSENTRY;
- if (write (pi->ctl_fd, (char *) &pi->saved_entryset,
- sizeof (struct sys_ctl)) < 0)
+/* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5 */
+#if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out */
+ return 0;
#else
- if (ioctl (pi->ctl_fd, PIOCSENTRY, &pi->saved_entryset.sysset) < 0)
+ struct {
+ procfs_ctl_t cmd;
+ char watch[sizeof (prwatch_t)];
+ } arg;
+ prwatch_t *pwatch;
+
+ pwatch = (prwatch_t *) &arg.watch;
+ /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to
+ convert a target address into something that can be stored in a
+ native data structure. */
+#ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */
+ pwatch->pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr);
+#else
+ pwatch->pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr);
#endif
- {
- print_sys_errmsg (pi->pathname, errno);
- printf_unfiltered ("PIOCSENTRY failed.\n");
- }
-#ifdef PROCFS_USE_READ_WRITE
- pi->saved_trace.cmd = PCSTRACE;
- if (write (pi->ctl_fd, (char *) &pi->saved_trace,
- sizeof (struct sig_ctl)) < 0)
+ pwatch->pr_size = len;
+ pwatch->pr_wflags = wflags;
+#if defined(NEW_PROC_API) && defined (PCWATCH)
+ arg.cmd = PCWATCH;
+ return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg));
+#else
+#if defined (PIOCSWATCH)
+ return (ioctl (pi->ctl_fd, PIOCSWATCH, pwatch) >= 0);
#else
- if (ioctl (pi->ctl_fd, PIOCSTRACE, &pi->saved_trace.sigset) < 0)
+ return 0; /* Fail */
#endif
- {
- print_sys_errmsg (pi->pathname, errno);
- printf_unfiltered ("PIOCSTRACE failed.\n");
- }
-#ifndef UNIXWARE
- if (ioctl (pi->ctl_fd, PIOCSHOLD, &pi->saved_sighold.sigset) < 0)
- {
- print_sys_errmsg (pi->pathname, errno);
- printf_unfiltered ("PIOSCHOLD failed.\n");
- }
#endif
-#ifdef PROCFS_USE_READ_WRITE
- pi->saved_fltset.cmd = PCSFAULT;
- if (write (pi->ctl_fd, (char *) &pi->saved_fltset,
- sizeof (struct flt_ctl)) < 0)
-#else
- if (ioctl (pi->ctl_fd, PIOCSFAULT, &pi->saved_fltset.fltset) < 0)
#endif
- {
- print_sys_errmsg (pi->pathname, errno);
- printf_unfiltered ("PIOCSFAULT failed.\n");
- }
- if (!procfs_read_status (pi))
- {
- print_sys_errmsg (pi->pathname, errno);
- printf_unfiltered ("procfs_read_status failed.\n");
- }
- else
- {
- if (signal
- || (THE_PR_LWP (pi->prstatus).pr_flags & (PR_STOPPED | PR_ISTOP)))
- {
- long cmd;
- struct proc_ctl pctl;
-
- if (signal || !pi->was_stopped ||
- query ("Was stopped when attached, make it runnable again? "))
- {
- /* Clear any pending signal if we want to detach without
- a signal. */
- if (signal == 0)
- set_proc_siginfo (pi, signal);
-
- /* Clear any fault that might have stopped it. */
-#ifdef PROCFS_USE_READ_WRITE
- cmd = PCCFAULT;
- if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
-#else
- if (ioctl (pi->ctl_fd, PIOCCFAULT, 0))
#endif
- {
- print_sys_errmsg (pi->pathname, errno);
- printf_unfiltered ("PIOCCFAULT failed.\n");
- }
-
- /* Make it run again when we close it. */
-
- modify_run_on_last_close_flag (pi->ctl_fd, 1);
- }
- }
- }
- close_proc_file (pi);
- }
- attach_flag = 0;
}
-/* emulate wait() as much as possible.
- Wait for child to do something. Return pid of child, or -1 in case
- of error; store status in *OURSTATUS.
-
- Not sure why we can't
- just use wait(), but it seems to have problems when applied to a
- process being controlled with the /proc interface.
-
- We have a race problem here with no obvious solution. We need to let
- the inferior run until it stops on an event of interest, which means
- that we need to use the PIOCWSTOP ioctl. However, we cannot use this
- ioctl if the process is already stopped on something that is not an
- event of interest, or the call will hang indefinitely. Thus we first
- use PIOCSTATUS to see if the process is not stopped. If not, then we
- use PIOCWSTOP. But during the window between the two, if the process
- stops for any reason that is not an event of interest (such as a job
- control signal) then gdb will hang. One possible workaround is to set
- an alarm to wake up every minute of so and check to see if the process
- is still running, and if so, then reissue the PIOCWSTOP. But this is
- a real kludge, so has not been implemented. FIXME: investigate
- alternatives.
-
- FIXME: Investigate why wait() seems to have problems with programs
- being control by /proc routines. */
-static int
-procfs_wait (pid, ourstatus)
- int pid;
- struct target_waitstatus *ourstatus;
-{
- short what;
- short why;
- int statval = 0;
- int checkerr = 0;
- int rtnval = -1;
- struct procinfo *pi;
- struct proc_ctl pctl;
+#ifdef TM_I386SOL2_H /* Is it hokey to use this? */
-scan_again:
+#include <sys/sysi86.h>
- /* handle all syscall events first, otherwise we might not
- notice a thread was created until too late. */
+/*
+ * Function: proc_get_LDT_entry
+ *
+ * Inputs:
+ * procinfo *pi;
+ * int key;
+ *
+ * The 'key' is actually the value of the lower 16 bits of
+ * the GS register for the LWP that we're interested in.
+ *
+ * Return: matching ssh struct (LDT entry).
+ */
- for (pi = procinfo_list; pi; pi = pi->next)
+struct ssd *
+proc_get_LDT_entry (procinfo *pi, int key)
+{
+ static struct ssd *ldt_entry = NULL;
+#ifdef NEW_PROC_API
+ char pathname[MAX_PROC_NAME_SIZE];
+ struct cleanup *old_chain = NULL;
+ int fd;
+
+ /* Allocate space for one LDT entry.
+ This alloc must persist, because we return a pointer to it. */
+ if (ldt_entry == NULL)
+ ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd));
+
+ /* Open the file descriptor for the LDT table. */
+ sprintf (pathname, "/proc/%d/ldt", pi->pid);
+ if ((fd = open_with_retry (pathname, O_RDONLY)) < 0)
{
- if (!pi->had_event)
- continue;
-
- if (!(THE_PR_LWP (pi->prstatus).pr_flags & (PR_STOPPED | PR_ISTOP)))
- continue;
-
- why = THE_PR_LWP (pi->prstatus).pr_why;
- what = THE_PR_LWP (pi->prstatus).pr_what;
- if (why == PR_SYSENTRY || why == PR_SYSEXIT)
- {
- int i;
- int found_handler = 0;
-
- for (i = 0; i < pi->num_syscall_handlers; i++)
- if (pi->syscall_handlers[i].syscall_num == what)
- {
- found_handler = 1;
- pi->saved_rtnval = pi->pid;
- pi->saved_statval = 0;
- if (!pi->syscall_handlers[i].func
- (pi, what, why, &pi->saved_rtnval, &pi->saved_statval))
- pi->had_event = 0;
- break;
- }
-
- if (!found_handler)
- {
- if (why == PR_SYSENTRY)
- error ("PR_SYSENTRY, unhandled system call %d", what);
- else
- error ("PR_SYSEXIT, unhandled system call %d", what);
- }
- }
+ proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__);
+ return NULL;
}
+ /* Make sure it gets closed again! */
+ old_chain = make_cleanup_close (fd);
- /* find a relevant process with an event */
-
- for (pi = procinfo_list; pi; pi = pi->next)
- if (pi->had_event && (pid == -1 || pi->pid == pid))
- break;
-
- if (!pi)
+ /* Now 'read' thru the table, find a match and return it. */
+ while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd))
{
- wait_fd ();
- goto scan_again;
+ if (ldt_entry->sel == 0 &&
+ ldt_entry->bo == 0 &&
+ ldt_entry->acc1 == 0 &&
+ ldt_entry->acc2 == 0)
+ break; /* end of table */
+ /* If key matches, return this entry. */
+ if (ldt_entry->sel == key)
+ return ldt_entry;
}
+ /* Loop ended, match not found. */
+ return NULL;
+#else
+ int nldt, i;
+ static int nalloc = 0;
- if (!checkerr
- && !(THE_PR_LWP (pi->prstatus).pr_flags & (PR_STOPPED | PR_ISTOP)))
+ /* Get the number of LDT entries. */
+ if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0)
{
- if (!procfs_write_pcwstop (pi))
- {
- checkerr++;
- }
+ proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__);
+ return NULL;
}
- if (checkerr)
+
+ /* Allocate space for the number of LDT entries. */
+ /* This alloc has to persist, 'cause we return a pointer to it. */
+ if (nldt > nalloc)
{
- if (errno == ENOENT)
- {
- /* XXX Fixme -- what to do if attached? Can't call wait... */
- rtnval = wait (&statval);
- if ((rtnval) != (PIDGET (inferior_pid)))
- {
- print_sys_errmsg (pi->pathname, errno);
- error ("procfs_wait: wait failed, returned %d", rtnval);
- /* NOTREACHED */
- }
- }
- else
- {
- print_sys_errmsg (pi->pathname, errno);
- error ("PIOCSTATUS or PIOCWSTOP failed.");
- /* NOTREACHED */
- }
+ ldt_entry = (struct ssd *)
+ xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd));
+ nalloc = nldt;
}
- else if (THE_PR_LWP (pi->prstatus).pr_flags & (PR_STOPPED | PR_ISTOP))
+
+ /* Read the whole table in one gulp. */
+ if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0)
{
-#ifdef UNIXWARE
- rtnval = pi->prstatus.pr_pid;
+ proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__);
+ return NULL;
+ }
+
+ /* Search the table and return the (first) entry matching 'key'. */
+ for (i = 0; i < nldt; i++)
+ if (ldt_entry[i].sel == key)
+ return &ldt_entry[i];
+
+ /* Loop ended, match not found. */
+ return NULL;
+#endif
+}
+
+#endif /* TM_I386SOL2_H */
+
+/* =============== END, non-thread part of /proc "MODULE" =============== */
+
+/* =================== Thread "MODULE" =================== */
+
+/* NOTE: you'll see more ifdefs and duplication of functions here,
+ since there is a different way to do threads on every OS. */
+
+/*
+ * Function: proc_get_nthreads
+ *
+ * Return the number of threads for the process
+ */
+
+#if defined (PIOCNTHR) && defined (PIOCTLIST)
+/*
+ * OSF version
+ */
+int
+proc_get_nthreads (procinfo *pi)
+{
+ int nthreads = 0;
+
+ if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0)
+ proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__);
+
+ return nthreads;
+}
+
#else
- rtnval = pi->pid;
+#if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */
+/*
+ * Solaris and Unixware version
+ */
+int
+proc_get_nthreads (procinfo *pi)
+{
+ if (!pi->status_valid)
+ if (!proc_get_status (pi))
+ return 0;
+
+ /*
+ * NEW_PROC_API: only works for the process procinfo,
+ * because the LWP procinfos do not get prstatus filled in.
+ */
+#ifdef NEW_PROC_API
+ if (pi->tid != 0) /* find the parent process procinfo */
+ pi = find_procinfo_or_die (pi->pid, 0);
#endif
- why = THE_PR_LWP (pi->prstatus).pr_why;
- what = THE_PR_LWP (pi->prstatus).pr_what;
+ return pi->prstatus.pr_nlwp;
+}
- switch (why)
- {
- case PR_SIGNALLED:
- statval = (what << 8) | 0177;
- break;
- case PR_SYSENTRY:
- case PR_SYSEXIT:
- rtnval = pi->saved_rtnval;
- statval = pi->saved_statval;
- break;
- case PR_REQUESTED:
- statval = (SIGSTOP << 8) | 0177;
- break;
- case PR_JOBCONTROL:
- statval = (what << 8) | 0177;
- break;
- case PR_FAULTED:
- switch (what)
- {
-#ifdef FLTWATCH
- case FLTWATCH:
- statval = (SIGTRAP << 8) | 0177;
- break;
+#else
+/*
+ * Default version
+ */
+int
+proc_get_nthreads (procinfo *pi)
+{
+ return 0;
+}
+#endif
+#endif
+
+/*
+ * Function: proc_get_current_thread (LWP version)
+ *
+ * Return the ID of the thread that had an event of interest.
+ * (ie. the one that hit a breakpoint or other traced event).
+ * All other things being equal, this should be the ID of a
+ * thread that is currently executing.
+ */
+
+#if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */
+/*
+ * Solaris and Unixware version
+ */
+int
+proc_get_current_thread (procinfo *pi)
+{
+ /*
+ * Note: this should be applied to the root procinfo for the process,
+ * not to the procinfo for an LWP. If applied to the procinfo for
+ * an LWP, it will simply return that LWP's ID. In that case,
+ * find the parent process procinfo.
+ */
+
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
+
+ if (!pi->status_valid)
+ if (!proc_get_status (pi))
+ return 0;
+
+#ifdef NEW_PROC_API
+ return pi->prstatus.pr_lwp.pr_lwpid;
+#else
+ return pi->prstatus.pr_who;
+#endif
+}
+
+#else
+#if defined (PIOCNTHR) && defined (PIOCTLIST)
+/*
+ * OSF version
+ */
+int
+proc_get_current_thread (procinfo *pi)
+{
+#if 0 /* FIXME: not ready for prime time? */
+ return pi->prstatus.pr_tid;
+#else
+ return 0;
#endif
-#ifdef FLTKWATCH
- case FLTKWATCH:
- statval = (SIGTRAP << 8) | 0177;
- break;
-#endif
-#ifndef FAULTED_USE_SIGINFO
- /* Irix, contrary to the documentation, fills in 0 for si_signo.
- Solaris fills in si_signo. I'm not sure about others. */
- case FLTPRIV:
- case FLTILL:
- statval = (SIGILL << 8) | 0177;
- break;
- case FLTBPT:
- case FLTTRACE:
- statval = (SIGTRAP << 8) | 0177;
- break;
- case FLTSTACK:
- case FLTACCESS:
- case FLTBOUNDS:
- statval = (SIGSEGV << 8) | 0177;
- break;
- case FLTIOVF:
- case FLTIZDIV:
- case FLTFPE:
- statval = (SIGFPE << 8) | 0177;
- break;
- case FLTPAGE: /* Recoverable page fault */
-#endif /* not FAULTED_USE_SIGINFO */
- default:
- /* Use the signal which the kernel assigns. This is better than
- trying to second-guess it from the fault. In fact, I suspect
- that FLTACCESS can be either SIGSEGV or SIGBUS. */
- statval =
- ((THE_PR_LWP (pi->prstatus).pr_info.si_signo) << 8) | 0177;
- break;
- }
- break;
- default:
- error ("PIOCWSTOP, unknown why %d, what %d", why, what);
- }
- /* Stop all the other threads when any of them stops. */
+}
- {
- struct procinfo *procinfo, *next_pi;
-
- for (procinfo = procinfo_list; procinfo; procinfo = next_pi)
- {
- next_pi = procinfo->next;
- if (!procinfo->had_event)
- {
-#ifdef PROCFS_USE_READ_WRITE
- long cmd = PCSTOP;
- if (write (pi->ctl_fd, (char *) &cmd, sizeof (long)) < 0)
- {
- print_sys_errmsg (procinfo->pathname, errno);
- error ("PCSTOP failed");
- }
#else
- /* A bug in Solaris (2.5) causes us to hang when trying to
- stop a stopped process. So, we have to check first in
- order to avoid the hang. */
- if (!procfs_read_status (procinfo))
- {
- /* The LWP has apparently terminated. */
- if (info_verbose)
- printf_filtered ("LWP %d doesn't respond.\n",
- (procinfo->pid >> 16) & 0xffff);
- close_proc_file (procinfo);
- continue;
- }
+/*
+ * Default version
+ */
+int
+proc_get_current_thread (procinfo *pi)
+{
+ return 0;
+}
- if (!(procinfo->prstatus.pr_flags & PR_STOPPED))
- if (ioctl (procinfo->ctl_fd, PIOCSTOP, &procinfo->prstatus)
- < 0)
- {
- print_sys_errmsg (procinfo->pathname, errno);
- warning ("PIOCSTOP failed");
- }
#endif
- }
- }
- }
- }
- else
- {
- error ("PIOCWSTOP, stopped for unknown/unhandled reason, flags %#x",
- THE_PR_LWP (pi->prstatus).pr_flags);
- }
+#endif
- store_waitstatus (ourstatus, statval);
+/*
+ * Function: proc_update_threads
+ *
+ * Discover the IDs of all the threads within the process, and
+ * create a procinfo for each of them (chained to the parent).
+ *
+ * This unfortunately requires a different method on every OS.
+ *
+ * Return: non-zero for success, zero for failure.
+ */
- if (rtnval == -1) /* No more children to wait for */
+int
+proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore)
+{
+ if (thread && parent) /* sanity */
{
- warning ("Child process unexpectedly missing");
- /* Claim it exited with unknown signal. */
- ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
- ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
- return rtnval;
+ thread->status_valid = 0;
+ if (!proc_get_status (thread))
+ destroy_one_procinfo (&parent->thread_list, thread);
}
-
- pi->had_event = 0; /* Indicate that we've seen this one */
- return (rtnval);
+ return 0; /* keep iterating */
}
+#if defined (PIOCLSTATUS)
/*
+ * Solaris 2.5 (ioctl) version
+ */
+int
+proc_update_threads (procinfo *pi)
+{
+ gdb_prstatus_t *prstatus;
+ struct cleanup *old_chain = NULL;
+ procinfo *thread;
+ int nlwp, i;
- LOCAL FUNCTION
-
- set_proc_siginfo - set a process's current signal info
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
- SYNOPSIS
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
- void set_proc_siginfo (struct procinfo *pip, int signo);
+ proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL);
- DESCRIPTION
+ if ((nlwp = proc_get_nthreads (pi)) <= 1)
+ return 1; /* Process is not multi-threaded; nothing to do. */
- Given a pointer to a process info struct in PIP and a signal number
- in SIGNO, set the process's current signal and its associated signal
- information. The signal will be delivered to the process immediately
- after execution is resumed, even if it is being held. In addition,
- this particular delivery will not cause another PR_SIGNALLED stop
- even if the signal is being traced.
+ prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1));
- If we are not delivering the same signal that the prstatus siginfo
- struct contains information about, then synthesize a siginfo struct
- to match the signal we are going to deliver, make it of the type
- "generated by a user process", and send this synthesized copy. When
- used to set the inferior's signal state, this will be required if we
- are not currently stopped because of a traced signal, or if we decide
- to continue with a different signal.
+ old_chain = make_cleanup (xfree, prstatus);
+ if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0)
+ proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__);
- Note that when continuing the inferior from a stop due to receipt
- of a traced signal, we either have set PRCSIG to clear the existing
- signal, or we have to call this function to do a PIOCSSIG with either
- the existing siginfo struct from pr_info, or one we have synthesized
- appropriately for the signal we want to deliver. Otherwise if the
- signal is still being traced, the inferior will immediately stop
- again.
+ /* Skip element zero, which represents the process as a whole. */
+ for (i = 1; i < nlwp + 1; i++)
+ {
+ if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL)
+ proc_error (pi, "update_threads, create_procinfo", __LINE__);
- See siginfo(5) for more details.
+ memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus));
+ thread->status_valid = 1;
+ }
+ pi->threads_valid = 1;
+ do_cleanups (old_chain);
+ return 1;
+}
+#else
+#ifdef NEW_PROC_API
+/*
+ * Unixware and Solaris 6 (and later) version
*/
-
static void
-set_proc_siginfo (pip, signo)
- struct procinfo *pip;
- int signo;
+do_closedir_cleanup (void *dir)
{
- struct siginfo newsiginfo;
- struct siginfo *sip;
- struct sigi_ctl sictl;
-
-#ifdef PROCFS_DONT_PIOCSSIG_CURSIG
- /* With Alpha OSF/1 procfs, the kernel gets really confused if it
- receives a PIOCSSIG with a signal identical to the current signal,
- it messes up the current signal. Work around the kernel bug. */
- if (signo == THE_PR_LWP (pip->prstatus).pr_cursig)
- return;
-#endif
+ closedir (dir);
+}
-#ifdef UNIXWARE
- if (signo == THE_PR_LWP (pip->prstatus).pr_info.si_signo)
- {
- memcpy ((char *) &sictl.siginfo, (char *) &pip->prstatus.pr_lwp.pr_info,
- sizeof (siginfo_t));
- }
-#else
- if (signo == THE_PR_LWP (pip->prstatus).pr_info.si_signo)
- {
- sip = &pip->prstatus.pr_info;
- }
-#endif
- else
- {
-#ifdef UNIXWARE
- siginfo_t *sip = &sictl.siginfo;
- memset ((char *) sip, 0, sizeof (siginfo_t));
-#else
- memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
- sip = &newsiginfo;
-#endif
- sip->si_signo = signo;
- sip->si_code = 0;
- sip->si_errno = 0;
- sip->si_pid = getpid ();
- sip->si_uid = getuid ();
- }
-#ifdef PROCFS_USE_READ_WRITE
- sictl.cmd = PCSSIG;
- if (write (pip->ctl_fd, (char *) &sictl, sizeof (struct sigi_ctl)) < 0)
-#else
- if (ioctl (pip->ctl_fd, PIOCSSIG, sip) < 0)
-#endif
- {
- print_sys_errmsg (pip->pathname, errno);
- warning ("PIOCSSIG failed");
- }
+int
+proc_update_threads (procinfo *pi)
+{
+ char pathname[MAX_PROC_NAME_SIZE + 16];
+ struct dirent *direntry;
+ struct cleanup *old_chain = NULL;
+ procinfo *thread;
+ DIR *dirp;
+ int lwpid;
+
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
+
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
+
+ proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL);
+
+ /*
+ * Unixware
+ *
+ * Note: this brute-force method is the only way I know of
+ * to accomplish this task on Unixware. This method will
+ * also work on Solaris 2.6 and 2.7. There is a much simpler
+ * and more elegant way to do this on Solaris, but the margins
+ * of this manuscript are too small to write it here... ;-)
+ */
+
+ strcpy (pathname, pi->pathname);
+ strcat (pathname, "/lwp");
+ if ((dirp = opendir (pathname)) == NULL)
+ proc_error (pi, "update_threads, opendir", __LINE__);
+
+ old_chain = make_cleanup (do_closedir_cleanup, dirp);
+ while ((direntry = readdir (dirp)) != NULL)
+ if (direntry->d_name[0] != '.') /* skip '.' and '..' */
+ {
+ lwpid = atoi (&direntry->d_name[0]);
+ if ((thread = create_procinfo (pi->pid, lwpid)) == NULL)
+ proc_error (pi, "update_threads, create_procinfo", __LINE__);
+ }
+ pi->threads_valid = 1;
+ do_cleanups (old_chain);
+ return 1;
}
+#else
+#ifdef PIOCTLIST
+/*
+ * OSF version
+ */
+int
+proc_update_threads (procinfo *pi)
+{
+ int nthreads, i;
+ tid_t *threads;
-/* Resume execution of process PID. If STEP is nozero, then
- just single step it. If SIGNAL is nonzero, restart it with that
- signal activated. */
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
-static void
-procfs_resume (pid, step, signo)
- int pid;
- int step;
- enum target_signal signo;
-{
- int signal_to_pass;
- struct procinfo *pi, *procinfo, *next_pi;
- struct proc_ctl pctl;
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
- pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
+ proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL);
- errno = 0;
-#ifdef UNIXWARE
- pctl.cmd = PCRUN;
- pctl.data = PRCFAULT;
-#else
- pi->prrun.pr_flags = PRSTRACE | PRSFAULT | PRCFAULT;
-#endif
+ nthreads = proc_get_nthreads (pi);
+ if (nthreads < 2)
+ return 0; /* nothing to do for 1 or fewer threads */
-#if 0
- /* It should not be necessary. If the user explicitly changes the value,
- value_assign calls write_register_bytes, which writes it. */
-/* It may not be absolutely necessary to specify the PC value for
- restarting, but to be safe we use the value that gdb considers
- to be current. One case where this might be necessary is if the
- user explicitly changes the PC value that gdb considers to be
- current. FIXME: Investigate if this is necessary or not. */
-
-#ifdef PRSVADDR_BROKEN
-/* Can't do this under Solaris running on a Sparc, as there seems to be no
- place to put nPC. In fact, if you use this, nPC seems to be set to some
- random garbage. We have to rely on the fact that PC and nPC have been
- written previously via PIOCSREG during a register flush. */
-
- pi->prrun.pr_vaddr = (caddr_t) * (int *) ®isters[REGISTER_BYTE (PC_REGNUM)];
- pi->prrun.pr_flags != PRSVADDR;
-#endif
-#endif
-
- if (signo == TARGET_SIGNAL_STOP && pi->nopass_next_sigstop)
- /* When attaching to a child process, if we forced it to stop with
- a PIOCSTOP, then we will have set the nopass_next_sigstop flag.
- Upon resuming the first time after such a stop, we explicitly
- inhibit sending it another SIGSTOP, which would be the normal
- result of default signal handling. One potential drawback to
- this is that we will also ignore any attempt to by the user
- to explicitly continue after the attach with a SIGSTOP. Ultimately
- this problem should be dealt with by making the routines that
- deal with the inferior a little smarter, and possibly even allow
- an inferior to continue running at the same time as gdb. (FIXME?) */
- signal_to_pass = 0;
- else if (signo == TARGET_SIGNAL_TSTP
- && THE_PR_LWP (pi->prstatus).pr_cursig == SIGTSTP
- && THE_PR_LWP (pi->prstatus).pr_action.sa_handler == SIG_DFL
- )
-
- /* We are about to pass the inferior a SIGTSTP whose action is
- SIG_DFL. The SIG_DFL action for a SIGTSTP is to stop
- (notifying the parent via wait()), and then keep going from the
- same place when the parent is ready for you to keep going. So
- under the debugger, it should do nothing (as if the program had
- been stopped and then later resumed. Under ptrace, this
- happens for us, but under /proc, the system obligingly stops
- the process, and wait_for_inferior would have no way of
- distinguishing that type of stop (which indicates that we
- should just start it again), with a stop due to the pr_trace
- field of the prrun_t struct.
-
- Note that if the SIGTSTP is being caught, we *do* need to pass it,
- because the handler needs to get executed. */
- signal_to_pass = 0;
- else
- signal_to_pass = target_signal_to_host (signo);
+ threads = xmalloc (nthreads * sizeof (tid_t));
- if (signal_to_pass)
- {
- set_proc_siginfo (pi, signal_to_pass);
- }
- else
- {
-#ifdef UNIXWARE
- pctl.data |= PRCSIG;
-#else
- pi->prrun.pr_flags |= PRCSIG;
-#endif
- }
- pi->nopass_next_sigstop = 0;
- if (step)
- {
-#ifdef UNIXWARE
- pctl.data |= PRSTEP;
-#else
- pi->prrun.pr_flags |= PRSTEP;
-#endif
- }
- pi->had_event = 0;
- /* Don't try to start a process unless it's stopped on an
- `event of interest'. Doing so will cause errors. */
+ if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0)
+ proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__);
- if (!procfs_read_status (pi))
+ for (i = 0; i < nthreads; i++)
{
- /* The LWP has apparently terminated. */
- if (info_verbose)
- printf_filtered ("LWP %d doesn't respond.\n",
- (pi->pid >> 16) & 0xffff);
- close_proc_file (pi);
+ if (!find_procinfo (pi->pid, threads[i]))
+ if (!create_procinfo (pi->pid, threads[i]))
+ proc_error (pi, "update_threads, create_procinfo", __LINE__);
}
- else
- {
-#ifdef PROCFS_USE_READ_WRITE
- if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
+ pi->threads_valid = 1;
+ return 1;
+}
#else
- if ((pi->prstatus.pr_flags & PR_ISTOP)
- && ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
-#endif
- {
- /* The LWP has apparently terminated. */
- if (info_verbose)
- printf_filtered ("LWP %d doesn't respond.\n",
- (pi->pid >> 16) & 0xffff);
- close_proc_file (pi);
- }
- }
+/*
+ * Default version
+ */
+int
+proc_update_threads (procinfo *pi)
+{
+ return 0;
+}
+#endif /* OSF PIOCTLIST */
+#endif /* NEW_PROC_API */
+#endif /* SOL 2.5 PIOCLSTATUS */
- /* Continue all the other threads that haven't had an event of interest.
- Also continue them if they have NOPASS_NEXT_SIGSTOP set; this is only
- set by do_attach, and means this is the first resume after an attach.
- All threads were CSTOP'd by do_attach, and should be resumed now. */
+/*
+ * Function: proc_iterate_over_threads
+ *
+ * Description:
+ * Given a pointer to a function, call that function once
+ * for each lwp in the procinfo list, until the function
+ * returns non-zero, in which event return the value
+ * returned by the function.
+ *
+ * Note: this function does NOT call update_threads.
+ * If you want to discover new threads first, you must
+ * call that function explicitly. This function just makes
+ * a quick pass over the currently-known procinfos.
+ *
+ * Arguments:
+ * pi - parent process procinfo
+ * func - per-thread function
+ * ptr - opaque parameter for function.
+ *
+ * Return:
+ * First non-zero return value from the callee, or zero.
+ */
- if (pid == -1)
- for (procinfo = procinfo_list; procinfo; procinfo = next_pi)
- {
- next_pi = procinfo->next;
- if (pi != procinfo)
- if (!procinfo->had_event ||
- (procinfo->nopass_next_sigstop && signo == TARGET_SIGNAL_STOP))
- {
- procinfo->had_event = procinfo->nopass_next_sigstop = 0;
-#ifdef PROCFS_USE_READ_WRITE
- pctl.data = PRCFAULT | PRCSIG;
- if (write (procinfo->ctl_fd, (char *) &pctl,
- sizeof (struct proc_ctl)) < 0)
- {
- if (!procfs_read_status (procinfo))
- fprintf_unfiltered (gdb_stderr,
- "procfs_read_status failed, errno=%d\n",
- errno);
- print_sys_errmsg (procinfo->pathname, errno);
- error ("PCRUN failed");
- }
-#else
- procinfo->prrun.pr_flags &= PRSTEP;
- procinfo->prrun.pr_flags |= PRCFAULT | PRCSIG;
- if (!procfs_read_status (procinfo))
- {
- /* The LWP has apparently terminated. */
- if (info_verbose)
- printf_filtered ("LWP %d doesn't respond.\n",
- (procinfo->pid >> 16) & 0xffff);
- close_proc_file (procinfo);
- continue;
- }
+int
+proc_iterate_over_threads (procinfo *pi,
+ int (*func) (procinfo *, procinfo *, void *),
+ void *ptr)
+{
+ procinfo *thread, *next;
+ int retval = 0;
- /* Don't try to start a process unless it's stopped on an
- `event of interest'. Doing so will cause errors. */
+ /*
+ * We should never have to apply this operation to any procinfo
+ * except the one for the main process. If that ever changes
+ * for any reason, then take out the following clause and
+ * replace it with one that makes sure the ctl_fd is open.
+ */
- if ((procinfo->prstatus.pr_flags & PR_ISTOP)
- && ioctl (procinfo->ctl_fd, PIOCRUN, &procinfo->prrun) < 0)
- {
- if (!procfs_read_status (procinfo))
- fprintf_unfiltered (gdb_stderr,
- "procfs_read_status failed, errno=%d\n",
- errno);
- print_sys_errmsg (procinfo->pathname, errno);
- warning ("PIOCRUN failed");
- }
-#endif
- }
- procfs_read_status (procinfo);
- }
-}
+ if (pi->tid != 0)
+ pi = find_procinfo_or_die (pi->pid, 0);
-/*
+ for (thread = pi->thread_list; thread != NULL; thread = next)
+ {
+ next = thread->next; /* in case thread is destroyed */
+ if ((retval = (*func) (pi, thread, ptr)) != 0)
+ break;
+ }
- LOCAL FUNCTION
+ return retval;
+}
- procfs_fetch_registers -- fetch current registers from inferior
+/* =================== END, Thread "MODULE" =================== */
- SYNOPSIS
+/* =================== END, /proc "MODULE" =================== */
- void procfs_fetch_registers (int regno)
+/* =================== GDB "MODULE" =================== */
- DESCRIPTION
+/*
+ * Here are all of the gdb target vector functions and their friends.
+ */
- Read the current values of the inferior's registers, both the
- general register set and floating point registers (if supported)
- and update gdb's idea of their current values.
+static ptid_t do_attach (ptid_t ptid);
+static void do_detach (int signo);
+static int register_gdb_signals (procinfo *, gdb_sigset_t *);
+static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum,
+ int entry_or_exit, int mode, int from_tty);
+static int insert_dbx_link_breakpoint (procinfo *pi);
+static void remove_dbx_link_breakpoint (void);
+
+/* On mips-irix, we need to insert a breakpoint at __dbx_link during
+ the startup phase. The following two variables are used to record
+ the address of the breakpoint, and the code that was replaced by
+ a breakpoint. */
+static int dbx_link_bpt_addr = 0;
+static void *dbx_link_bpt;
+/*
+ * Function: procfs_debug_inferior
+ *
+ * Sets up the inferior to be debugged.
+ * Registers to trace signals, hardware faults, and syscalls.
+ * Note: does not set RLC flag: caller may want to customize that.
+ *
+ * Returns: zero for success (note! unlike most functions in this module)
+ * On failure, returns the LINE NUMBER where it failed!
*/
-static void
-procfs_fetch_registers (regno)
- int regno;
+static int
+procfs_debug_inferior (procinfo *pi)
{
- struct procinfo *pi;
+ fltset_t traced_faults;
+ gdb_sigset_t traced_signals;
+ sysset_t *traced_syscall_entries;
+ sysset_t *traced_syscall_exits;
+ int status;
+
+#ifdef PROCFS_DONT_TRACE_FAULTS
+ /* On some systems (OSF), we don't trace hardware faults.
+ Apparently it's enough that we catch them as signals.
+ Wonder why we don't just do that in general? */
+ premptyset (&traced_faults); /* don't trace faults. */
+#else
+ /* Register to trace hardware faults in the child. */
+ prfillset (&traced_faults); /* trace all faults... */
+ prdelset (&traced_faults, FLTPAGE); /* except page fault. */
+#endif
+ if (!proc_set_traced_faults (pi, &traced_faults))
+ return __LINE__;
- pi = current_procinfo;
+ /* Register to trace selected signals in the child. */
+ premptyset (&traced_signals);
+ if (!register_gdb_signals (pi, &traced_signals))
+ return __LINE__;
-#ifdef UNIXWARE
- if (procfs_read_status (pi))
- {
- supply_gregset (&pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs);
-#if defined (FP0_REGNUM)
- supply_fpregset (&pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs);
+
+ /* Register to trace the 'exit' system call (on entry). */
+ traced_syscall_entries = sysset_t_alloc (pi);
+ gdb_premptysysset (traced_syscall_entries);
+#ifdef SYS_exit
+ gdb_praddsysset (traced_syscall_entries, SYS_exit);
#endif
- }
-#else /* UNIXWARE */
- if (ioctl (pi->ctl_fd, PIOCGREG, &pi->gregset.gregset) != -1)
- {
- supply_gregset (&pi->gregset.gregset);
- }
-#if defined (FP0_REGNUM)
- if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset.fpregset) != -1)
- {
- supply_fpregset (&pi->fpregset.fpregset);
- }
+#ifdef SYS_lwpexit
+ gdb_praddsysset (traced_syscall_entries, SYS_lwpexit); /* And _lwp_exit... */
+#endif
+#ifdef SYS_lwp_exit
+ gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit);
+#endif
+#ifdef DYNAMIC_SYSCALLS
+ {
+ int callnum = find_syscall (pi, "_exit");
+ if (callnum >= 0)
+ gdb_praddsysset (traced_syscall_entries, callnum);
+ }
#endif
-#endif /* UNIXWARE */
-}
-/*
+ status = proc_set_traced_sysentry (pi, traced_syscall_entries);
+ xfree (traced_syscall_entries);
+ if (!status)
+ return __LINE__;
- LOCAL FUNCTION
+#ifdef PRFS_STOPEXEC /* defined on OSF */
+ /* OSF method for tracing exec syscalls. Quoting:
+ Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
+ exits from exec system calls because of the user level loader. */
+ /* FIXME: make nice and maybe move into an access function. */
+ {
+ int prfs_flags;
- proc_init_failed - called when /proc access initialization fails
- fails
+ if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0)
+ return __LINE__;
- SYNOPSIS
+ prfs_flags |= PRFS_STOPEXEC;
- static void proc_init_failed (struct procinfo *pi,
- char *why, int kill_p)
+ if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0)
+ return __LINE__;
+ }
+#else /* not PRFS_STOPEXEC */
+ /* Everyone else's (except OSF) method for tracing exec syscalls */
+ /* GW: Rationale...
+ Not all systems with /proc have all the exec* syscalls with the same
+ names. On the SGI, for example, there is no SYS_exec, but there
+ *is* a SYS_execv. So, we try to account for that. */
- DESCRIPTION
+ traced_syscall_exits = sysset_t_alloc (pi);
+ gdb_premptysysset (traced_syscall_exits);
+#ifdef SYS_exec
+ gdb_praddsysset (traced_syscall_exits, SYS_exec);
+#endif
+#ifdef SYS_execve
+ gdb_praddsysset (traced_syscall_exits, SYS_execve);
+#endif
+#ifdef SYS_execv
+ gdb_praddsysset (traced_syscall_exits, SYS_execv);
+#endif
- This function is called whenever initialization of access to a /proc
- entry fails. It prints a suitable error message, does some cleanup,
- and then invokes the standard error processing routine which dumps
- us back into the command loop. If KILL_P is true, sends SIGKILL.
- */
+#ifdef SYS_lwpcreate
+ gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate);
+ gdb_praddsysset (traced_syscall_exits, SYS_lwpexit);
+#endif
-static void
-proc_init_failed (pi, why, kill_p)
- struct procinfo *pi;
- char *why;
- int kill_p;
-{
- print_sys_errmsg (pi->pathname, errno);
- if (kill_p)
- kill (pi->pid, SIGKILL);
- close_proc_file (pi);
- error (why);
- /* NOTREACHED */
-}
+#ifdef SYS_lwp_create /* FIXME: once only, please */
+ gdb_praddsysset (traced_syscall_exits, SYS_lwp_create);
+ gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit);
+#endif
-/*
+#ifdef DYNAMIC_SYSCALLS
+ {
+ int callnum = find_syscall (pi, "execve");
+ if (callnum >= 0)
+ gdb_praddsysset (traced_syscall_exits, callnum);
+ callnum = find_syscall (pi, "ra_execve");
+ if (callnum >= 0)
+ gdb_praddsysset (traced_syscall_exits, callnum);
+ }
+#endif
- LOCAL FUNCTION
+ status = proc_set_traced_sysexit (pi, traced_syscall_exits);
+ xfree (traced_syscall_exits);
+ if (!status)
+ return __LINE__;
+
+#endif /* PRFS_STOPEXEC */
+ return 0;
+}
- close_proc_file - close any currently open /proc entry
+static void
+procfs_attach (char *args, int from_tty)
+{
+ char *exec_file;
+ int pid;
- SYNOPSIS
+ if (!args)
+ error_no_arg (_("process-id to attach"));
- static void close_proc_file (struct procinfo *pip)
+ pid = atoi (args);
+ if (pid == getpid ())
+ error (_("Attaching GDB to itself is not a good idea..."));
- DESCRIPTION
+ if (from_tty)
+ {
+ exec_file = get_exec_file (0);
- Close any currently open /proc entry and mark the process information
- entry as invalid. In order to ensure that we don't try to reuse any
- stale information, the pid, fd, and pathnames are explicitly
- invalidated, which may be overkill.
+ if (exec_file)
+ printf_filtered (_("Attaching to program `%s', %s\n"),
+ exec_file, target_pid_to_str (pid_to_ptid (pid)));
+ else
+ printf_filtered (_("Attaching to %s\n"),
+ target_pid_to_str (pid_to_ptid (pid)));
- */
+ fflush (stdout);
+ }
+ inferior_ptid = do_attach (pid_to_ptid (pid));
+ push_target (&procfs_ops);
+}
static void
-close_proc_file (pip)
- struct procinfo *pip;
+procfs_detach (char *args, int from_tty)
{
- struct procinfo *procinfo;
+ int sig = 0;
+
+ if (args)
+ sig = atoi (args);
- delete_thread (pip->pid); /* remove thread from GDB's thread list */
- remove_fd (pip); /* Remove fd from poll/select list */
+ if (from_tty)
+ {
+ int pid = PIDGET (inferior_ptid);
+ char *exec_file;
- close (pip->ctl_fd);
-#ifdef HAVE_MULTIPLE_PROC_FDS
- close (pip->as_fd);
- close (pip->status_fd);
- close (pip->map_fd);
-#endif
+ exec_file = get_exec_file (0);
+ if (exec_file == NULL)
+ exec_file = "";
+
+ printf_filtered (_("Detaching from program: %s, %s\n"), exec_file,
+ target_pid_to_str (pid_to_ptid (pid)));
+ gdb_flush (gdb_stdout);
+ }
+
+ do_detach (sig);
+
+ inferior_ptid = null_ptid;
+ unpush_target (&procfs_ops);
+}
- free (pip->pathname);
+static ptid_t
+do_attach (ptid_t ptid)
+{
+ procinfo *pi;
+ int fail;
+
+ if ((pi = create_procinfo (PIDGET (ptid), 0)) == NULL)
+ perror (_("procfs: out of memory in 'attach'"));
- /* Unlink pip from the procinfo chain. Note pip might not be on the list. */
+ if (!open_procinfo_files (pi, FD_CTL))
+ {
+ fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__);
+ sprintf (errmsg, "do_attach: couldn't open /proc file for process %d",
+ PIDGET (ptid));
+ dead_procinfo (pi, errmsg, NOKILL);
+ }
- if (procinfo_list == pip)
- procinfo_list = pip->next;
+ /* Stop the process (if it isn't already stopped). */
+ if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))
+ {
+ pi->was_stopped = 1;
+ proc_prettyprint_why (proc_why (pi), proc_what (pi), 1);
+ }
else
{
- for (procinfo = procinfo_list; procinfo; procinfo = procinfo->next)
- {
- if (procinfo->next == pip)
- {
- procinfo->next = pip->next;
- break;
- }
- }
- free (pip);
+ pi->was_stopped = 0;
+ /* Set the process to run again when we close it. */
+ if (!proc_set_run_on_last_close (pi))
+ dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL);
+
+ /* Now stop the process. */
+ if (!proc_stop_process (pi))
+ dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL);
+ pi->ignore_next_sigstop = 1;
}
+ /* Save some of the /proc state to be restored if we detach. */
+ if (!proc_get_traced_faults (pi, &pi->saved_fltset))
+ dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL);
+ if (!proc_get_traced_signals (pi, &pi->saved_sigset))
+ dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL);
+ if (!proc_get_traced_sysentry (pi, pi->saved_entryset))
+ dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.",
+ NOKILL);
+ if (!proc_get_traced_sysexit (pi, pi->saved_exitset))
+ dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.",
+ NOKILL);
+ if (!proc_get_held_signals (pi, &pi->saved_sighold))
+ dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL);
+
+ if ((fail = procfs_debug_inferior (pi)) != 0)
+ dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL);
+
+ /* Let GDB know that the inferior was attached. */
+ attach_flag = 1;
+ return MERGEPID (pi->pid, proc_get_current_thread (pi));
}
static void
-close_proc_file_cleanup (pip)
- void *pip;
+do_detach (int signo)
{
- close_proc_file ((struct procinfo *) pip);
-}
+ procinfo *pi;
-static struct cleanup *
-make_cleanup_close_proc_file (pip)
- struct procinfo *pip;
-{
- return make_cleanup (close_proc_file_cleanup, pip);
-}
+ /* Find procinfo for the main process */
+ pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); /* FIXME: threads */
+ if (signo)
+ if (!proc_set_current_signal (pi, signo))
+ proc_warn (pi, "do_detach, set_current_signal", __LINE__);
-/*
+ if (!proc_set_traced_signals (pi, &pi->saved_sigset))
+ proc_warn (pi, "do_detach, set_traced_signal", __LINE__);
+
+ if (!proc_set_traced_faults (pi, &pi->saved_fltset))
+ proc_warn (pi, "do_detach, set_traced_faults", __LINE__);
- LOCAL FUNCTION
+ if (!proc_set_traced_sysentry (pi, pi->saved_entryset))
+ proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__);
- open_proc_file - open a /proc entry for a given process id
+ if (!proc_set_traced_sysexit (pi, pi->saved_exitset))
+ proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__);
- SYNOPSIS
+ if (!proc_set_held_signals (pi, &pi->saved_sighold))
+ proc_warn (pi, "do_detach, set_held_signals", __LINE__);
- static int open_proc_file (int pid, struct procinfo *pip, int mode)
+ if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)))
+ if (signo || !(pi->was_stopped) ||
+ query (_("Was stopped when attached, make it runnable again? ")))
+ {
+ /* Clear any pending signal. */
+ if (!proc_clear_current_fault (pi))
+ proc_warn (pi, "do_detach, clear_current_fault", __LINE__);
+
+ if (signo == 0 && !proc_clear_current_signal (pi))
+ proc_warn (pi, "do_detach, clear_current_signal", __LINE__);
+
+ if (!proc_set_run_on_last_close (pi))
+ proc_warn (pi, "do_detach, set_rlc", __LINE__);
+ }
- DESCRIPTION
+ attach_flag = 0;
+ destroy_procinfo (pi);
+}
- Given a process id and a mode, close the existing open /proc
- entry (if any) and open one for the new process id, in the
- specified mode. Once it is open, then mark the local process
- information structure as valid, which guarantees that the pid,
- fd, and pathname fields match an open /proc entry. Returns
- zero if the open fails, nonzero otherwise.
+/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
+ for all registers.
- Note that the pathname is left intact, even when the open fails,
- so that callers can use it to construct meaningful error messages
- rather than just "file open failed".
+ ??? Is the following note still relevant? We can't get individual
+ registers with the PT_GETREGS ptrace(2) request either, yet we
+ don't bother with caching at all in that case.
- Note that for Solaris, the process-id also includes an LWP-id, so we
- actually attempt to open that. If we are handed a pid with a 0 LWP-id,
- then we will ask the kernel what it is and add it to the pid. Hence,
- the pid can be changed by us.
- */
+ NOTE: Since the /proc interface cannot give us individual
+ registers, we pay no attention to REGNUM, and just fetch them all.
+ This results in the possibility that we will do unnecessarily many
+ fetches, since we may be called repeatedly for individual
+ registers. So we cache the results, and mark the cache invalid
+ when the process is resumed. */
-static int
-open_proc_file (pid, pip, mode, control)
- int pid;
- struct procinfo *pip;
- int mode;
- int control;
+static void
+procfs_fetch_registers (struct regcache *regcache, int regnum)
{
- int tmp, tmpfd;
+ gdb_gregset_t *gregs;
+ procinfo *pi;
+ int pid = PIDGET (inferior_ptid);
+ int tid = TIDGET (inferior_ptid);
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
- pip->next = NULL;
- pip->had_event = 0;
- pip->pathname = xmalloc (MAX_PROC_NAME_SIZE);
- pip->pid = pid;
+ /* First look up procinfo for the main process. */
+ pi = find_procinfo_or_die (pid, 0);
-#ifndef PIOCOPENLWP
- tmp = pid;
-#else
- tmp = pid & 0xffff;
-#endif
+ /* If the event thread is not the same as GDB's requested thread
+ (ie. inferior_ptid), then look up procinfo for the requested
+ thread. */
+ if (tid != 0 && tid != proc_get_current_thread (pi))
+ pi = find_procinfo_or_die (pid, tid);
+
+ if (pi == NULL)
+ error (_("procfs: fetch_registers failed to find procinfo for %s"),
+ target_pid_to_str (inferior_ptid));
+
+ gregs = proc_get_gregs (pi);
+ if (gregs == NULL)
+ proc_error (pi, "fetch_registers, get_gregs", __LINE__);
-#ifdef HAVE_MULTIPLE_PROC_FDS
- sprintf (pip->pathname, STATUS_PROC_NAME_FMT, tmp);
- if ((pip->status_fd = open (pip->pathname, O_RDONLY)) < 0)
+ supply_gregset (regcache, (const gdb_gregset_t *) gregs);
+
+ if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */
{
- return 0;
+ gdb_fpregset_t *fpregs;
+
+ if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch))
+ || regnum == gdbarch_pc_regnum (gdbarch)
+ || regnum == gdbarch_sp_regnum (gdbarch))
+ return; /* Not a floating point register. */
+
+ fpregs = proc_get_fpregs (pi);
+ if (fpregs == NULL)
+ proc_error (pi, "fetch_registers, get_fpregs", __LINE__);
+
+ supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs);
}
+}
+
+/* Get ready to modify the registers array. On machines which store
+ individual registers, this doesn't need to do anything. On
+ machines which store all the registers in one fell swoop, such as
+ /proc, this makes sure that registers contains all the registers
+ from the program being debugged. */
+
+static void
+procfs_prepare_to_store (struct regcache *regcache)
+{
+}
- sprintf (pip->pathname, AS_PROC_NAME_FMT, tmp);
- if ((pip->as_fd = open (pip->pathname, O_RDWR)) < 0)
- {
- close (pip->status_fd);
- return 0;
- }
+/* Store register REGNUM back into the inferior. If REGNUM is -1, do
+ this for all registers.
- sprintf (pip->pathname, MAP_PROC_NAME_FMT, tmp);
- if ((pip->map_fd = open (pip->pathname, O_RDONLY)) < 0)
- {
- close (pip->status_fd);
- close (pip->as_fd);
- return 0;
- }
+ NOTE: Since the /proc interface will not read individual registers,
+ we will cache these requests until the process is resumed, and only
+ then write them back to the inferior process.
+
+ FIXME: is that a really bad idea? Have to think about cases where
+ writing one register might affect the value of others, etc. */
- if (control)
- {
- sprintf (pip->pathname, CTL_PROC_NAME_FMT, tmp);
- if ((pip->ctl_fd = open (pip->pathname, O_WRONLY)) < 0)
- {
- close (pip->status_fd);
- close (pip->as_fd);
- close (pip->map_fd);
- return 0;
- }
- }
+static void
+procfs_store_registers (struct regcache *regcache, int regnum)
+{
+ gdb_gregset_t *gregs;
+ procinfo *pi;
+ int pid = PIDGET (inferior_ptid);
+ int tid = TIDGET (inferior_ptid);
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
-#else /* HAVE_MULTIPLE_PROC_FDS */
- sprintf (pip->pathname, CTL_PROC_NAME_FMT, tmp);
+ /* First find procinfo for main process. */
+ pi = find_procinfo_or_die (pid, 0);
- if ((tmpfd = open (pip->pathname, mode)) < 0)
- return 0;
+ /* If the event thread is not the same as GDB's requested thread
+ (ie. inferior_ptid), then look up procinfo for the requested
+ thread. */
+ if (tid != 0 && tid != proc_get_current_thread (pi))
+ pi = find_procinfo_or_die (pid, tid);
-#ifndef PIOCOPENLWP
- pip->ctl_fd = tmpfd;
- pip->as_fd = tmpfd;
- pip->map_fd = tmpfd;
- pip->status_fd = tmpfd;
-#else
- tmp = (pid >> 16) & 0xffff; /* Extract thread id */
+ if (pi == NULL)
+ error (_("procfs: store_registers: failed to find procinfo for %s"),
+ target_pid_to_str (inferior_ptid));
- if (tmp == 0)
- { /* Don't know thread id yet */
- if (ioctl (tmpfd, PIOCSTATUS, &pip->prstatus) < 0)
- {
- print_sys_errmsg (pip->pathname, errno);
- close (tmpfd);
- error ("open_proc_file: PIOCSTATUS failed");
- }
+ gregs = proc_get_gregs (pi);
+ if (gregs == NULL)
+ proc_error (pi, "store_registers, get_gregs", __LINE__);
- tmp = pip->prstatus.pr_who; /* Get thread id from prstatus_t */
- pip->pid = (tmp << 16) | pid; /* Update pip */
- }
+ fill_gregset (regcache, gregs, regnum);
+ if (!proc_set_gregs (pi))
+ proc_error (pi, "store_registers, set_gregs", __LINE__);
- if ((pip->ctl_fd = ioctl (tmpfd, PIOCOPENLWP, &tmp)) < 0)
+ if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */
{
- close (tmpfd);
- return 0;
- }
+ gdb_fpregset_t *fpregs;
-#ifdef PIOCSET /* New method */
- {
- long pr_flags;
- pr_flags = PR_ASYNC;
- ioctl (pip->ctl_fd, PIOCSET, &pr_flags);
- }
-#endif
+ if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch))
+ || regnum == gdbarch_pc_regnum (gdbarch)
+ || regnum == gdbarch_sp_regnum (gdbarch))
+ return; /* Not a floating point register. */
- /* keep extra fds in sync */
- pip->as_fd = pip->ctl_fd;
- pip->map_fd = pip->ctl_fd;
- pip->status_fd = pip->ctl_fd;
+ fpregs = proc_get_fpregs (pi);
+ if (fpregs == NULL)
+ proc_error (pi, "store_registers, get_fpregs", __LINE__);
- close (tmpfd); /* All done with main pid */
-#endif /* PIOCOPENLWP */
+ fill_fpregset (regcache, fpregs, regnum);
+ if (!proc_set_fpregs (pi))
+ proc_error (pi, "store_registers, set_fpregs", __LINE__);
+ }
+}
-#endif /* HAVE_MULTIPLE_PROC_FDS */
+static int
+syscall_is_lwp_exit (procinfo *pi, int scall)
+{
- return 1;
+#ifdef SYS_lwp_exit
+ if (scall == SYS_lwp_exit)
+ return 1;
+#endif
+#ifdef SYS_lwpexit
+ if (scall == SYS_lwpexit)
+ return 1;
+#endif
+ return 0;
}
-static char *
-mappingflags (flags)
- long flags;
+static int
+syscall_is_exit (procinfo *pi, int scall)
{
- static char asciiflags[8];
+#ifdef SYS_exit
+ if (scall == SYS_exit)
+ return 1;
+#endif
+#ifdef DYNAMIC_SYSCALLS
+ if (find_syscall (pi, "_exit") == scall)
+ return 1;
+#endif
+ return 0;
+}
- strcpy (asciiflags, "-------");
-#if defined (MA_PHYS)
- if (flags & MA_PHYS)
- asciiflags[0] = 'd';
+static int
+syscall_is_exec (procinfo *pi, int scall)
+{
+#ifdef SYS_exec
+ if (scall == SYS_exec)
+ return 1;
#endif
- if (flags & MA_STACK)
- asciiflags[1] = 's';
- if (flags & MA_BREAK)
- asciiflags[2] = 'b';
- if (flags & MA_SHARED)
- asciiflags[3] = 's';
- if (flags & MA_READ)
- asciiflags[4] = 'r';
- if (flags & MA_WRITE)
- asciiflags[5] = 'w';
- if (flags & MA_EXEC)
- asciiflags[6] = 'x';
- return (asciiflags);
+#ifdef SYS_execv
+ if (scall == SYS_execv)
+ return 1;
+#endif
+#ifdef SYS_execve
+ if (scall == SYS_execve)
+ return 1;
+#endif
+#ifdef DYNAMIC_SYSCALLS
+ if (find_syscall (pi, "_execve"))
+ return 1;
+ if (find_syscall (pi, "ra_execve"))
+ return 1;
+#endif
+ return 0;
}
-static void
-info_proc_flags (pip, summary)
- struct procinfo *pip;
- int summary;
+static int
+syscall_is_lwp_create (procinfo *pi, int scall)
{
- struct trans *transp;
-#ifdef UNIXWARE
- long flags = pip->prstatus.pr_flags | pip->prstatus.pr_lwp.pr_flags;
-#else
- long flags = pip->prstatus.pr_flags;
+#ifdef SYS_lwp_create
+ if (scall == SYS_lwp_create)
+ return 1;
+#endif
+#ifdef SYS_lwpcreate
+ if (scall == SYS_lwpcreate)
+ return 1;
#endif
+ return 0;
+}
- printf_filtered ("%-32s", "Process status flags:");
- if (!summary)
- {
- printf_filtered ("\n\n");
- }
- for (transp = pr_flag_table; transp->name != NULL; transp++)
+/*
+ * Function: target_wait
+ *
+ * Retrieve the next stop event from the child process.
+ * If child has not stopped yet, wait for it to stop.
+ * Translate /proc eventcodes (or possibly wait eventcodes)
+ * into gdb internal event codes.
+ *
+ * Return: id of process (and possibly thread) that incurred the event.
+ * event codes are returned thru a pointer parameter.
+ */
+
+static ptid_t
+procfs_wait (ptid_t ptid, struct target_waitstatus *status)
+{
+ /* First cut: loosely based on original version 2.1 */
+ procinfo *pi;
+ int wstat;
+ int temp_tid;
+ ptid_t retval, temp_ptid;
+ int why, what, flags;
+ int retry = 0;
+
+wait_again:
+
+ retry++;
+ wstat = 0;
+ retval = pid_to_ptid (-1);
+
+ /* Find procinfo for main process */
+ pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
+ if (pi)
{
- if (flags & transp->value)
+ /* We must assume that the status is stale now... */
+ pi->status_valid = 0;
+ pi->gregs_valid = 0;
+ pi->fpregs_valid = 0;
+
+#if 0 /* just try this out... */
+ flags = proc_flags (pi);
+ why = proc_why (pi);
+ if ((flags & PR_STOPPED) && (why == PR_REQUESTED))
+ pi->status_valid = 0; /* re-read again, IMMEDIATELY... */
+#endif
+ /* If child is not stopped, wait for it to stop. */
+ if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) &&
+ !proc_wait_for_stop (pi))
{
- if (summary)
+ /* wait_for_stop failed: has the child terminated? */
+ if (errno == ENOENT)
{
- printf_filtered ("%s ", transp->name);
+ int wait_retval;
+
+ /* /proc file not found; presumably child has terminated. */
+ wait_retval = wait (&wstat); /* "wait" for the child's exit */
+
+ if (wait_retval != PIDGET (inferior_ptid)) /* wrong child? */
+ error (_("procfs: couldn't stop process %d: wait returned %d."),
+ PIDGET (inferior_ptid), wait_retval);
+ /* FIXME: might I not just use waitpid?
+ Or try find_procinfo to see if I know about this child? */
+ retval = pid_to_ptid (wait_retval);
}
+ else if (errno == EINTR)
+ goto wait_again;
else
{
- printf_filtered ("\t%-16s %s.\n", transp->name, transp->desc);
+ /* Unknown error from wait_for_stop. */
+ proc_error (pi, "target_wait (wait_for_stop)", __LINE__);
}
}
- }
- printf_filtered ("\n");
-}
+ else
+ {
+ /* This long block is reached if either:
+ a) the child was already stopped, or
+ b) we successfully waited for the child with wait_for_stop.
+ This block will analyze the /proc status, and translate it
+ into a waitstatus for GDB.
-static void
-info_proc_stop (pip, summary)
- struct procinfo *pip;
- int summary;
-{
- struct trans *transp;
- int why;
- int what;
+ If we actually had to call wait because the /proc file
+ is gone (child terminated), then we skip this block,
+ because we already have a waitstatus. */
- why = THE_PR_LWP (pip->prstatus).pr_why;
- what = THE_PR_LWP (pip->prstatus).pr_what;
+ flags = proc_flags (pi);
+ why = proc_why (pi);
+ what = proc_what (pi);
- if (THE_PR_LWP (pip->prstatus).pr_flags & PR_STOPPED)
- {
- printf_filtered ("%-32s", "Reason for stopping:");
- if (!summary)
- {
- printf_filtered ("\n\n");
- }
- for (transp = pr_why_table; transp->name != NULL; transp++)
- {
- if (why == transp->value)
+ if (flags & (PR_STOPPED | PR_ISTOP))
{
- if (summary)
- {
- printf_filtered ("%s ", transp->name);
+#ifdef PR_ASYNC
+ /* If it's running async (for single_thread control),
+ set it back to normal again. */
+ if (flags & PR_ASYNC)
+ if (!proc_unset_async (pi))
+ proc_error (pi, "target_wait, unset_async", __LINE__);
+#endif
+
+ if (info_verbose)
+ proc_prettyprint_why (why, what, 1);
+
+ /* The 'pid' we will return to GDB is composed of
+ the process ID plus the lwp ID. */
+ retval = MERGEPID (pi->pid, proc_get_current_thread (pi));
+
+ switch (why) {
+ case PR_SIGNALLED:
+ wstat = (what << 8) | 0177;
+ break;
+ case PR_SYSENTRY:
+ if (syscall_is_lwp_exit (pi, what))
+ {
+ printf_filtered (_("[%s exited]\n"),
+ target_pid_to_str (retval));
+ delete_thread (retval);
+ status->kind = TARGET_WAITKIND_SPURIOUS;
+ return retval;
+ }
+ else if (syscall_is_exit (pi, what))
+ {
+ /* Handle SYS_exit call only */
+ /* Stopped at entry to SYS_exit.
+ Make it runnable, resume it, then use
+ the wait system call to get its exit code.
+ Proc_run_process always clears the current
+ fault and signal.
+ Then return its exit status. */
+ pi->status_valid = 0;
+ wstat = 0;
+ /* FIXME: what we should do is return
+ TARGET_WAITKIND_SPURIOUS. */
+ if (!proc_run_process (pi, 0, 0))
+ proc_error (pi, "target_wait, run_process", __LINE__);
+ if (attach_flag)
+ {
+ /* Don't call wait: simulate waiting for exit,
+ return a "success" exit code. Bogus: what if
+ it returns something else? */
+ wstat = 0;
+ retval = inferior_ptid; /* ? ? ? */
+ }
+ else
+ {
+ int temp = wait (&wstat);
+
+ /* FIXME: shouldn't I make sure I get the right
+ event from the right process? If (for
+ instance) I have killed an earlier inferior
+ process but failed to clean up after it
+ somehow, I could get its termination event
+ here. */
+
+ /* If wait returns -1, that's what we return to GDB. */
+ if (temp < 0)
+ retval = pid_to_ptid (temp);
+ }
+ }
+ else
+ {
+ printf_filtered (_("procfs: trapped on entry to "));
+ proc_prettyprint_syscall (proc_what (pi), 0);
+ printf_filtered ("\n");
+#ifndef PIOCSSPCACT
+ {
+ long i, nsysargs, *sysargs;
+
+ if ((nsysargs = proc_nsysarg (pi)) > 0 &&
+ (sysargs = proc_sysargs (pi)) != NULL)
+ {
+ printf_filtered (_("%ld syscall arguments:\n"), nsysargs);
+ for (i = 0; i < nsysargs; i++)
+ printf_filtered ("#%ld: 0x%08lx\n",
+ i, sysargs[i]);
+ }
+
+ }
+#endif
+ if (status)
+ {
+ /* How to exit gracefully, returning "unknown event" */
+ status->kind = TARGET_WAITKIND_SPURIOUS;
+ return inferior_ptid;
+ }
+ else
+ {
+ /* How to keep going without returning to wfi: */
+ target_resume (ptid, 0, TARGET_SIGNAL_0);
+ goto wait_again;
+ }
+ }
+ break;
+ case PR_SYSEXIT:
+ if (syscall_is_exec (pi, what))
+ {
+ /* Hopefully this is our own "fork-child" execing
+ the real child. Hoax this event into a trap, and
+ GDB will see the child about to execute its start
+ address. */
+ wstat = (SIGTRAP << 8) | 0177;
+ }
+#ifdef SYS_syssgi
+ else if (what == SYS_syssgi)
+ {
+ /* see if we can break on dbx_link(). If yes, then
+ we no longer need the SYS_syssgi notifications. */
+ if (insert_dbx_link_breakpoint (pi))
+ proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT,
+ FLAG_RESET, 0);
+
+ /* This is an internal event and should be transparent
+ to wfi, so resume the execution and wait again. See
+ comment in procfs_init_inferior() for more details. */
+ target_resume (ptid, 0, TARGET_SIGNAL_0);
+ goto wait_again;
+ }
+#endif
+ else if (syscall_is_lwp_create (pi, what))
+ {
+ /*
+ * This syscall is somewhat like fork/exec.
+ * We will get the event twice: once for the parent LWP,
+ * and once for the child. We should already know about
+ * the parent LWP, but the child will be new to us. So,
+ * whenever we get this event, if it represents a new
+ * thread, simply add the thread to the list.
+ */
+
+ /* If not in procinfo list, add it. */
+ temp_tid = proc_get_current_thread (pi);
+ if (!find_procinfo (pi->pid, temp_tid))
+ create_procinfo (pi->pid, temp_tid);
+
+ temp_ptid = MERGEPID (pi->pid, temp_tid);
+ /* If not in GDB's thread list, add it. */
+ if (!in_thread_list (temp_ptid))
+ {
+ printf_filtered (_("[New %s]\n"),
+ target_pid_to_str (temp_ptid));
+ add_thread (temp_ptid);
+ }
+ /* Return to WFI, but tell it to immediately resume. */
+ status->kind = TARGET_WAITKIND_SPURIOUS;
+ return inferior_ptid;
+ }
+ else if (syscall_is_lwp_exit (pi, what))
+ {
+ printf_filtered (_("[%s exited]\n"),
+ target_pid_to_str (retval));
+ delete_thread (retval);
+ status->kind = TARGET_WAITKIND_SPURIOUS;
+ return retval;
+ }
+ else if (0)
+ {
+ /* FIXME: Do we need to handle SYS_sproc,
+ SYS_fork, or SYS_vfork here? The old procfs
+ seemed to use this event to handle threads on
+ older (non-LWP) systems, where I'm assuming
+ that threads were actually separate processes.
+ Irix, maybe? Anyway, low priority for now. */
+ }
+ else
+ {
+ printf_filtered (_("procfs: trapped on exit from "));
+ proc_prettyprint_syscall (proc_what (pi), 0);
+ printf_filtered ("\n");
+#ifndef PIOCSSPCACT
+ {
+ long i, nsysargs, *sysargs;
+
+ if ((nsysargs = proc_nsysarg (pi)) > 0 &&
+ (sysargs = proc_sysargs (pi)) != NULL)
+ {
+ printf_filtered (_("%ld syscall arguments:\n"), nsysargs);
+ for (i = 0; i < nsysargs; i++)
+ printf_filtered ("#%ld: 0x%08lx\n",
+ i, sysargs[i]);
+ }
+ }
+#endif
+ status->kind = TARGET_WAITKIND_SPURIOUS;
+ return inferior_ptid;
+ }
+ break;
+ case PR_REQUESTED:
+#if 0 /* FIXME */
+ wstat = (SIGSTOP << 8) | 0177;
+ break;
+#else
+ if (retry < 5)
+ {
+ printf_filtered (_("Retry #%d:\n"), retry);
+ pi->status_valid = 0;
+ goto wait_again;
+ }
+ else
+ {
+ /* If not in procinfo list, add it. */
+ temp_tid = proc_get_current_thread (pi);
+ if (!find_procinfo (pi->pid, temp_tid))
+ create_procinfo (pi->pid, temp_tid);
+
+ /* If not in GDB's thread list, add it. */
+ temp_ptid = MERGEPID (pi->pid, temp_tid);
+ if (!in_thread_list (temp_ptid))
+ {
+ printf_filtered (_("[New %s]\n"),
+ target_pid_to_str (temp_ptid));
+ add_thread (temp_ptid);
+ }
+
+ status->kind = TARGET_WAITKIND_STOPPED;
+ status->value.sig = 0;
+ return retval;
+ }
+#endif
+ case PR_JOBCONTROL:
+ wstat = (what << 8) | 0177;
+ break;
+ case PR_FAULTED:
+ switch (what) {
+#ifdef FLTWATCH
+ case FLTWATCH:
+ wstat = (SIGTRAP << 8) | 0177;
+ break;
+#endif
+#ifdef FLTKWATCH
+ case FLTKWATCH:
+ wstat = (SIGTRAP << 8) | 0177;
+ break;
+#endif
+ /* FIXME: use si_signo where possible. */
+ case FLTPRIV:
+#if (FLTILL != FLTPRIV) /* avoid "duplicate case" error */
+ case FLTILL:
+#endif
+ wstat = (SIGILL << 8) | 0177;
+ break;
+ case FLTBPT:
+#if (FLTTRACE != FLTBPT) /* avoid "duplicate case" error */
+ case FLTTRACE:
+#endif
+ /* If we hit our __dbx_link() internal breakpoint,
+ then remove it. See comments in procfs_init_inferior()
+ for more details. */
+ if (dbx_link_bpt_addr != 0
+ && dbx_link_bpt_addr == read_pc ())
+ remove_dbx_link_breakpoint ();
+
+ wstat = (SIGTRAP << 8) | 0177;
+ break;
+ case FLTSTACK:
+ case FLTACCESS:
+#if (FLTBOUNDS != FLTSTACK) /* avoid "duplicate case" error */
+ case FLTBOUNDS:
+#endif
+ wstat = (SIGSEGV << 8) | 0177;
+ break;
+ case FLTIOVF:
+ case FLTIZDIV:
+#if (FLTFPE != FLTIOVF) /* avoid "duplicate case" error */
+ case FLTFPE:
+#endif
+ wstat = (SIGFPE << 8) | 0177;
+ break;
+ case FLTPAGE: /* Recoverable page fault */
+ default: /* FIXME: use si_signo if possible for fault */
+ retval = pid_to_ptid (-1);
+ printf_filtered ("procfs:%d -- ", __LINE__);
+ printf_filtered (_("child stopped for unknown reason:\n"));
+ proc_prettyprint_why (why, what, 1);
+ error (_("... giving up..."));
+ break;
}
- else
+ break; /* case PR_FAULTED: */
+ default: /* switch (why) unmatched */
+ printf_filtered ("procfs:%d -- ", __LINE__);
+ printf_filtered (_("child stopped for unknown reason:\n"));
+ proc_prettyprint_why (why, what, 1);
+ error (_("... giving up..."));
+ break;
+ }
+ /*
+ * Got this far without error:
+ * If retval isn't in the threads database, add it.
+ */
+ if (PIDGET (retval) > 0 &&
+ !ptid_equal (retval, inferior_ptid) &&
+ !in_thread_list (retval))
{
- printf_filtered ("\t%-16s %s.\n",
- transp->name, transp->desc);
+ /*
+ * We have a new thread.
+ * We need to add it both to GDB's list and to our own.
+ * If we don't create a procinfo, resume may be unhappy
+ * later.
+ */
+ printf_filtered (_("[New %s]\n"), target_pid_to_str (retval));
+ add_thread (retval);
+ if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL)
+ create_procinfo (PIDGET (retval), TIDGET (retval));
+
+ /* In addition, it's possible that this is the first
+ * new thread we've seen, in which case we may not
+ * have created entries for inferior_ptid yet.
+ */
+ if (TIDGET (inferior_ptid) != 0)
+ {
+ if (!in_thread_list (inferior_ptid))
+ add_thread (inferior_ptid);
+ if (find_procinfo (PIDGET (inferior_ptid),
+ TIDGET (inferior_ptid)) == NULL)
+ create_procinfo (PIDGET (inferior_ptid),
+ TIDGET (inferior_ptid));
+ }
}
- break;
- }
- }
-
- /* Use the pr_why field to determine what the pr_what field means, and
- print more information. */
-
- switch (why)
- {
- case PR_REQUESTED:
- /* pr_what is unused for this case */
- break;
- case PR_JOBCONTROL:
- case PR_SIGNALLED:
- if (summary)
- {
- printf_filtered ("%s ", signalname (what));
- }
- else
- {
- printf_filtered ("\t%-16s %s.\n", signalname (what),
- safe_strsignal (what));
- }
- break;
- case PR_SYSENTRY:
- if (summary)
- {
- printf_filtered ("%s ", syscallname (what));
- }
- else
- {
- printf_filtered ("\t%-16s %s.\n", syscallname (what),
- "Entered this system call");
- }
- break;
- case PR_SYSEXIT:
- if (summary)
- {
- printf_filtered ("%s ", syscallname (what));
- }
- else
- {
- printf_filtered ("\t%-16s %s.\n", syscallname (what),
- "Returned from this system call");
- }
- break;
- case PR_FAULTED:
- if (summary)
- {
- printf_filtered ("%s ",
- lookupname (faults_table, what, "fault"));
}
- else
+ else /* flags do not indicate STOPPED */
{
- printf_filtered ("\t%-16s %s.\n",
- lookupname (faults_table, what, "fault"),
- lookupdesc (faults_table, what));
+ /* surely this can't happen... */
+ printf_filtered ("procfs:%d -- process not stopped.\n",
+ __LINE__);
+ proc_prettyprint_flags (flags, 1);
+ error (_("procfs: ...giving up..."));
}
- break;
}
- printf_filtered ("\n");
+
+ if (status)
+ store_waitstatus (status, wstat);
}
+
+ return retval;
}
-static void
-info_proc_siginfo (pip, summary)
- struct procinfo *pip;
- int summary;
+/* Perform a partial transfer to/from the specified object. For
+ memory transfers, fall back to the old memory xfer functions. */
+
+static LONGEST
+procfs_xfer_partial (struct target_ops *ops, enum target_object object,
+ const char *annex, void *readbuf,
+ const void *writebuf, ULONGEST offset, LONGEST len)
+{
+ switch (object)
+ {
+ case TARGET_OBJECT_MEMORY:
+ if (readbuf)
+ return (*ops->deprecated_xfer_memory) (offset, readbuf, len,
+ 0/*write*/, NULL, ops);
+ if (writebuf)
+ return (*ops->deprecated_xfer_memory) (offset, writebuf, len,
+ 1/*write*/, NULL, ops);
+ return -1;
+
+#ifdef NEW_PROC_API
+ case TARGET_OBJECT_AUXV:
+ return procfs_xfer_auxv (ops, object, annex, readbuf, writebuf,
+ offset, len);
+#endif
+
+ default:
+ if (ops->beneath != NULL)
+ return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
+ readbuf, writebuf, offset, len);
+ return -1;
+ }
+}
+
+
+/* Transfer LEN bytes between GDB address MYADDR and target address
+ MEMADDR. If DOWRITE is non-zero, transfer them to the target,
+ otherwise transfer them from the target. TARGET is unused.
+
+ The return value is 0 if an error occurred or no bytes were
+ transferred. Otherwise, it will be a positive value which
+ indicates the number of bytes transferred between gdb and the
+ target. (Note that the interface also makes provisions for
+ negative values, but this capability isn't implemented here.) */
+
+static int
+procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int dowrite,
+ struct mem_attrib *attrib, struct target_ops *target)
{
- struct siginfo *sip;
+ procinfo *pi;
+ int nbytes = 0;
- if ((THE_PR_LWP (pip->prstatus).pr_flags & PR_STOPPED) &&
- (THE_PR_LWP (pip->prstatus).pr_why == PR_SIGNALLED ||
- THE_PR_LWP (pip->prstatus).pr_why == PR_FAULTED))
+ /* Find procinfo for main process */
+ pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
+ if (pi->as_fd == 0 &&
+ open_procinfo_files (pi, FD_AS) == 0)
{
- printf_filtered ("%-32s", "Additional signal/fault info:");
- sip = &(THE_PR_LWP (pip->prstatus).pr_info);
- if (summary)
+ proc_warn (pi, "xfer_memory, open_proc_files", __LINE__);
+ return 0;
+ }
+
+ if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr)
+ {
+ if (dowrite)
{
- printf_filtered ("%s ", signalname (sip->si_signo));
- if (sip->si_errno > 0)
- {
- printf_filtered ("%s ", errnoname (sip->si_errno));
- }
- if (sip->si_code <= 0)
- {
- printf_filtered ("sent by %s, uid %d ",
- target_pid_to_str (sip->si_pid),
- sip->si_uid);
- }
- else
- {
- printf_filtered ("%s ", sigcodename (sip));
- if ((sip->si_signo == SIGILL) ||
- (sip->si_signo == SIGFPE) ||
- (sip->si_signo == SIGSEGV) ||
- (sip->si_signo == SIGBUS))
- {
- printf_filtered ("addr=%#lx ",
- (unsigned long) sip->si_addr);
- }
- else if ((sip->si_signo == SIGCHLD))
- {
- printf_filtered ("child %s, status %u ",
- target_pid_to_str (sip->si_pid),
- sip->si_status);
- }
- else if ((sip->si_signo == SIGPOLL))
- {
- printf_filtered ("band %u ", sip->si_band);
- }
- }
+#ifdef NEW_PROC_API
+ PROCFS_NOTE ("write memory: ");
+#else
+ PROCFS_NOTE ("write memory: \n");
+#endif
+ nbytes = write (pi->as_fd, myaddr, len);
}
else
{
- printf_filtered ("\n\n");
- printf_filtered ("\t%-16s %s.\n", signalname (sip->si_signo),
- safe_strsignal (sip->si_signo));
- if (sip->si_errno > 0)
- {
- printf_filtered ("\t%-16s %s.\n",
- errnoname (sip->si_errno),
- safe_strerror (sip->si_errno));
- }
- if (sip->si_code <= 0)
- {
- printf_filtered ("\t%-16u %s\n", sip->si_pid, /* XXX need target_pid_to_str() */
- "PID of process sending signal");
- printf_filtered ("\t%-16u %s\n", sip->si_uid,
- "UID of process sending signal");
- }
- else
- {
- printf_filtered ("\t%-16s %s.\n", sigcodename (sip),
- sigcodedesc (sip));
- if ((sip->si_signo == SIGILL) ||
- (sip->si_signo == SIGFPE))
- {
- printf_filtered ("\t%#-16lx %s.\n",
- (unsigned long) sip->si_addr,
- "Address of faulting instruction");
- }
- else if ((sip->si_signo == SIGSEGV) ||
- (sip->si_signo == SIGBUS))
- {
- printf_filtered ("\t%#-16lx %s.\n",
- (unsigned long) sip->si_addr,
- "Address of faulting memory reference");
- }
- else if ((sip->si_signo == SIGCHLD))
- {
- printf_filtered ("\t%-16u %s.\n", sip->si_pid, /* XXX need target_pid_to_str() */
- "Child process ID");
- printf_filtered ("\t%-16u %s.\n", sip->si_status,
- "Child process exit value or signal");
- }
- else if ((sip->si_signo == SIGPOLL))
- {
- printf_filtered ("\t%-16u %s.\n", sip->si_band,
- "Band event for POLL_{IN,OUT,MSG}");
- }
- }
+ PROCFS_NOTE ("read memory: \n");
+ nbytes = read (pi->as_fd, myaddr, len);
+ }
+ if (nbytes < 0)
+ {
+ nbytes = 0;
}
- printf_filtered ("\n");
}
+ return nbytes;
+}
+
+/*
+ * Function: invalidate_cache
+ *
+ * Called by target_resume before making child runnable.
+ * Mark cached registers and status's invalid.
+ * If there are "dirty" caches that need to be written back
+ * to the child process, do that.
+ *
+ * File descriptors are also cached.
+ * As they are a limited resource, we cannot hold onto them indefinitely.
+ * However, as they are expensive to open, we don't want to throw them
+ * away indescriminately either. As a compromise, we will keep the
+ * file descriptors for the parent process, but discard any file
+ * descriptors we may have accumulated for the threads.
+ *
+ * Return value:
+ * As this function is called by iterate_over_threads, it always
+ * returns zero (so that iterate_over_threads will keep iterating).
+ */
+
+
+static int
+invalidate_cache (procinfo *parent, procinfo *pi, void *ptr)
+{
+ /*
+ * About to run the child; invalidate caches and do any other cleanup.
+ */
+
+#if 0
+ if (pi->gregs_dirty)
+ if (parent == NULL ||
+ proc_get_current_thread (parent) != pi->tid)
+ if (!proc_set_gregs (pi)) /* flush gregs cache */
+ proc_warn (pi, "target_resume, set_gregs",
+ __LINE__);
+ if (gdbarch_fp0_regnum (current_gdbarch) >= 0)
+ if (pi->fpregs_dirty)
+ if (parent == NULL ||
+ proc_get_current_thread (parent) != pi->tid)
+ if (!proc_set_fpregs (pi)) /* flush fpregs cache */
+ proc_warn (pi, "target_resume, set_fpregs",
+ __LINE__);
+#endif
+
+ if (parent != NULL)
+ {
+ /* The presence of a parent indicates that this is an LWP.
+ Close any file descriptors that it might have open.
+ We don't do this to the master (parent) procinfo. */
+
+ close_procinfo_files (pi);
+ }
+ pi->gregs_valid = 0;
+ pi->fpregs_valid = 0;
+#if 0
+ pi->gregs_dirty = 0;
+ pi->fpregs_dirty = 0;
+#endif
+ pi->status_valid = 0;
+ pi->threads_valid = 0;
+
+ return 0;
+}
+
+#if 0
+/*
+ * Function: make_signal_thread_runnable
+ *
+ * A callback function for iterate_over_threads.
+ * Find the asynchronous signal thread, and make it runnable.
+ * See if that helps matters any.
+ */
+
+static int
+make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr)
+{
+#ifdef PR_ASLWP
+ if (proc_flags (pi) & PR_ASLWP)
+ {
+ if (!proc_run_process (pi, 0, -1))
+ proc_error (pi, "make_signal_thread_runnable", __LINE__);
+ return 1;
+ }
+#endif
+ return 0;
}
+#endif
+
+/*
+ * Function: target_resume
+ *
+ * Make the child process runnable. Normally we will then call
+ * procfs_wait and wait for it to stop again (unles gdb is async).
+ *
+ * Arguments:
+ * step: if true, then arrange for the child to stop again
+ * after executing a single instruction.
+ * signo: if zero, then cancel any pending signal.
+ * If non-zero, then arrange for the indicated signal
+ * to be delivered to the child when it runs.
+ * pid: if -1, then allow any child thread to run.
+ * if non-zero, then allow only the indicated thread to run.
+ ******* (not implemented yet)
+ */
static void
-info_proc_syscalls (pip, summary)
- struct procinfo *pip;
- int summary;
+procfs_resume (ptid_t ptid, int step, enum target_signal signo)
{
- int syscallnum;
+ procinfo *pi, *thread;
+ int native_signo;
+
+ /* 2.1:
+ prrun.prflags |= PRSVADDR;
+ prrun.pr_vaddr = $PC; set resume address
+ prrun.prflags |= PRSTRACE; trace signals in pr_trace (all)
+ prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE)
+ prrun.prflags |= PRCFAULT; clear current fault.
+
+ PRSTRACE and PRSFAULT can be done by other means
+ (proc_trace_signals, proc_trace_faults)
+ PRSVADDR is unnecessary.
+ PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault)
+ This basically leaves PRSTEP and PRCSIG.
+ PRCSIG is like PIOCSSIG (proc_clear_current_signal).
+ So basically PR_STEP is the sole argument that must be passed
+ to proc_run_process (for use in the prrun struct by ioctl). */
+
+ /* Find procinfo for main process */
+ pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
+
+ /* First cut: ignore pid argument */
+ errno = 0;
- if (!summary)
- {
+ /* Convert signal to host numbering. */
+ if (signo == 0 ||
+ (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop))
+ native_signo = 0;
+ else
+ native_signo = target_signal_to_host (signo);
+
+ pi->ignore_next_sigstop = 0;
+
+ /* Running the process voids all cached registers and status. */
+ /* Void the threads' caches first */
+ proc_iterate_over_threads (pi, invalidate_cache, NULL);
+ /* Void the process procinfo's caches. */
+ invalidate_cache (NULL, pi, NULL);
-#if 0 /* FIXME: Needs to use gdb-wide configured info about system calls. */
- if (pip->prstatus.pr_flags & PR_ASLEEP)
+ if (PIDGET (ptid) != -1)
+ {
+ /* Resume a specific thread, presumably suppressing the others. */
+ thread = find_procinfo (PIDGET (ptid), TIDGET (ptid));
+ if (thread != NULL)
{
- int syscallnum = pip->prstatus.pr_reg[R_D0];
- if (summary)
- {
- printf_filtered ("%-32s", "Sleeping in system call:");
- printf_filtered ("%s", syscallname (syscallnum));
- }
- else
+ if (thread->tid != 0)
{
- printf_filtered ("Sleeping in system call '%s'.\n",
- syscallname (syscallnum));
+ /* We're to resume a specific thread, and not the others.
+ * Set the child process's PR_ASYNC flag.
+ */
+#ifdef PR_ASYNC
+ if (!proc_set_async (pi))
+ proc_error (pi, "target_resume, set_async", __LINE__);
+#endif
+#if 0
+ proc_iterate_over_threads (pi,
+ make_signal_thread_runnable,
+ NULL);
+#endif
+ pi = thread; /* substitute the thread's procinfo for run */
}
}
-#endif
+ }
-#ifndef UNIXWARE
- if (ioctl (pip->ctl_fd, PIOCGENTRY, &pip->entryset) < 0)
- {
- print_sys_errmsg (pip->pathname, errno);
- error ("PIOCGENTRY failed");
- }
+ if (!proc_run_process (pi, step, native_signo))
+ {
+ if (errno == EBUSY)
+ warning (_("resume: target already running. Pretend to resume, and hope for the best!"));
+ else
+ proc_error (pi, "target_resume", __LINE__);
+ }
+}
- if (ioctl (pip->ctl_fd, PIOCGEXIT, &pip->exitset) < 0)
- {
- print_sys_errmsg (pip->pathname, errno);
- error ("PIOCGEXIT failed");
- }
-#endif
+/*
+ * Function: register_gdb_signals
+ *
+ * Traverse the list of signals that GDB knows about
+ * (see "handle" command), and arrange for the target
+ * to be stopped or not, according to these settings.
+ *
+ * Returns non-zero for success, zero for failure.
+ */
- printf_filtered ("System call tracing information:\n\n");
+static int
+register_gdb_signals (procinfo *pi, gdb_sigset_t *signals)
+{
+ int signo;
- printf_filtered ("\t%-12s %-8s %-8s\n",
- "System call",
- "Entry",
- "Exit");
- for (syscallnum = 0; syscallnum < MAX_SYSCALLS; syscallnum++)
- {
- QUIT;
- if (syscall_table[syscallnum] != NULL)
- printf_filtered ("\t%-12s ", syscall_table[syscallnum]);
- else
- printf_filtered ("\t%-12d ", syscallnum);
+ for (signo = 0; signo < NSIG; signo ++)
+ if (signal_stop_state (target_signal_from_host (signo)) == 0 &&
+ signal_print_state (target_signal_from_host (signo)) == 0 &&
+ signal_pass_state (target_signal_from_host (signo)) == 1)
+ prdelset (signals, signo);
+ else
+ praddset (signals, signo);
-#ifdef UNIXWARE
- printf_filtered ("%-8s ",
- prismember (&pip->prstatus.pr_sysentry, syscallnum)
- ? "on" : "off");
- printf_filtered ("%-8s ",
- prismember (&pip->prstatus.pr_sysexit, syscallnum)
- ? "on" : "off");
-#else
- printf_filtered ("%-8s ",
- prismember (&pip->entryset, syscallnum)
- ? "on" : "off");
- printf_filtered ("%-8s ",
- prismember (&pip->exitset, syscallnum)
- ? "on" : "off");
-#endif
- printf_filtered ("\n");
- }
- printf_filtered ("\n");
- }
+ return proc_set_traced_signals (pi, signals);
}
-static char *
-signalname (signo)
- int signo;
+/*
+ * Function: target_notice_signals
+ *
+ * Set up to trace signals in the child process.
+ */
+
+static void
+procfs_notice_signals (ptid_t ptid)
{
- const char *name;
- static char locbuf[32];
+ gdb_sigset_t signals;
+ procinfo *pi = find_procinfo_or_die (PIDGET (ptid), 0);
- name = strsigno (signo);
- if (name == NULL)
- {
- sprintf (locbuf, "Signal %d", signo);
- }
+ if (proc_get_traced_signals (pi, &signals) &&
+ register_gdb_signals (pi, &signals))
+ return;
else
- {
- sprintf (locbuf, "%s (%d)", name, signo);
- }
- return (locbuf);
+ proc_error (pi, "notice_signals", __LINE__);
}
-static char *
-errnoname (errnum)
- int errnum;
-{
- const char *name;
- static char locbuf[32];
+/*
+ * Function: target_files_info
+ *
+ * Print status information about the child process.
+ */
- name = strerrno (errnum);
- if (name == NULL)
- {
- sprintf (locbuf, "Errno %d", errnum);
- }
- else
- {
- sprintf (locbuf, "%s (%d)", name, errnum);
- }
- return (locbuf);
+static void
+procfs_files_info (struct target_ops *ignore)
+{
+ printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"),
+ attach_flag? "attached": "child",
+ target_pid_to_str (inferior_ptid));
}
+/*
+ * Function: target_open
+ *
+ * A dummy: you don't open procfs.
+ */
+
static void
-info_proc_signals (pip, summary)
- struct procinfo *pip;
- int summary;
+procfs_open (char *args, int from_tty)
{
- int signo;
+ error (_("Use the \"run\" command to start a Unix child process."));
+}
- if (!summary)
- {
-#ifndef PROCFS_USE_READ_WRITE
- if (ioctl (pip->ctl_fd, PIOCGTRACE, &pip->trace) < 0)
- {
- print_sys_errmsg (pip->pathname, errno);
- error ("PIOCGTRACE failed");
- }
-#endif
+/*
+ * Function: target_can_run
+ *
+ * This tells GDB that this target vector can be invoked
+ * for "run" or "attach".
+ */
- printf_filtered ("Disposition of signals:\n\n");
- printf_filtered ("\t%-15s %-8s %-8s %-8s %s\n\n",
- "Signal", "Trace", "Hold", "Pending", "Description");
- for (signo = 0; signo < NSIG; signo++)
- {
- QUIT;
- printf_filtered ("\t%-15s ", signalname (signo));
-#ifdef UNIXWARE
- printf_filtered ("%-8s ",
- prismember (&pip->prstatus.pr_sigtrace, signo)
- ? "on" : "off");
- printf_filtered ("%-8s ",
- prismember (&pip->prstatus.pr_lwp.pr_context.uc_sigmask, signo)
- ? "on" : "off");
-#else
- printf_filtered ("%-8s ",
- prismember (&pip->trace, signo)
- ? "on" : "off");
- printf_filtered ("%-8s ",
- prismember (&pip->prstatus.pr_sighold, signo)
- ? "on" : "off");
-#endif
+int procfs_suppress_run = 0; /* Non-zero if procfs should pretend not to
+ be a runnable target. Used by targets
+ that can sit atop procfs, such as solaris
+ thread support. */
-#ifdef UNIXWARE
- if (prismember (&pip->prstatus.pr_sigpend, signo) ||
- prismember (&pip->prstatus.pr_lwp.pr_lwppend, signo))
- printf_filtered ("%-8s ", "yes");
- else
- printf_filtered ("%-8s ", "no");
-#else /* UNIXWARE */
-#ifdef PROCFS_SIGPEND_OFFSET
- /* Alpha OSF/1 numbers the pending signals from 1. */
- printf_filtered ("%-8s ",
- (signo ? prismember (&pip->prstatus.pr_sigpend,
- signo - 1)
- : 0)
- ? "yes" : "no");
-#else
- printf_filtered ("%-8s ",
- prismember (&pip->prstatus.pr_sigpend, signo)
- ? "yes" : "no");
-#endif
-#endif /* UNIXWARE */
- printf_filtered (" %s\n", safe_strsignal (signo));
- }
- printf_filtered ("\n");
- }
+
+static int
+procfs_can_run (void)
+{
+ /* This variable is controlled by modules that sit atop procfs that
+ may layer their own process structure atop that provided here.
+ sol-thread.c does this because of the Solaris two-level thread
+ model. */
+
+ /* NOTE: possibly obsolete -- use the thread_stratum approach instead. */
+
+ return !procfs_suppress_run;
+}
+
+/*
+ * Function: target_stop
+ *
+ * Stop the child process asynchronously, as when the
+ * gdb user types control-c or presses a "stop" button.
+ *
+ * Works by sending kill(SIGINT) to the child's process group.
+ */
+
+static void
+procfs_stop (void)
+{
+ kill (-inferior_process_group, SIGINT);
}
+/*
+ * Function: unconditionally_kill_inferior
+ *
+ * Make it die. Wait for it to die. Clean up after it.
+ * Note: this should only be applied to the real process,
+ * not to an LWP, because of the check for parent-process.
+ * If we need this to work for an LWP, it needs some more logic.
+ */
+
static void
-info_proc_faults (pip, summary)
- struct procinfo *pip;
- int summary;
+unconditionally_kill_inferior (procinfo *pi)
{
- struct trans *transp;
+ int parent_pid;
- if (!summary)
+ parent_pid = proc_parent_pid (pi);
+#ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL
+ /* FIXME: use access functions */
+ /* Alpha OSF/1-3.x procfs needs a clear of the current signal
+ before the PIOCKILL, otherwise it might generate a corrupted core
+ file for the inferior. */
+ if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0)
{
-#ifndef UNIXWARE
- if (ioctl (pip->ctl_fd, PIOCGFAULT, &pip->fltset.fltset) < 0)
- {
- print_sys_errmsg (pip->pathname, errno);
- error ("PIOCGFAULT failed");
- }
+ printf_filtered ("unconditionally_kill: SSIG failed!\n");
+ }
#endif
+#ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL
+ /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal
+ to kill the inferior, otherwise it might remain stopped with a
+ pending SIGKILL.
+ We do not check the result of the PIOCSSIG, the inferior might have
+ died already. */
+ {
+ gdb_siginfo_t newsiginfo;
+
+ memset ((char *) &newsiginfo, 0, sizeof (newsiginfo));
+ newsiginfo.si_signo = SIGKILL;
+ newsiginfo.si_code = 0;
+ newsiginfo.si_errno = 0;
+ newsiginfo.si_pid = getpid ();
+ newsiginfo.si_uid = getuid ();
+ /* FIXME: use proc_set_current_signal */
+ ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo);
+ }
+#else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
+ if (!proc_kill (pi, SIGKILL))
+ proc_error (pi, "unconditionally_kill, proc_kill", __LINE__);
+#endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */
+ destroy_procinfo (pi);
- printf_filtered ("Current traced hardware fault set:\n\n");
- printf_filtered ("\t%-12s %-8s\n", "Fault", "Trace");
+ /* If pi is GDB's child, wait for it to die. */
+ if (parent_pid == getpid ())
+ /* FIXME: should we use waitpid to make sure we get the right event?
+ Should we check the returned event? */
+ {
+#if 0
+ int status, ret;
- for (transp = faults_table; transp->name != NULL; transp++)
- {
- QUIT;
- printf_filtered ("\t%-12s ", transp->name);
-#ifdef UNIXWARE
- printf_filtered ("%-8s", prismember (&pip->prstatus.pr_flttrace, transp->value)
- ? "on" : "off");
+ ret = waitpid (pi->pid, &status, 0);
#else
- printf_filtered ("%-8s", prismember (&pip->fltset.fltset, transp->value)
- ? "on" : "off");
+ wait (NULL);
#endif
- printf_filtered ("\n");
- }
- printf_filtered ("\n");
}
}
+/*
+ * Function: target_kill_inferior
+ *
+ * We're done debugging it, and we want it to go away.
+ * Then we want GDB to forget all about it.
+ */
+
static void
-info_proc_mappings (pip, summary)
- struct procinfo *pip;
- int summary;
+procfs_kill_inferior (void)
{
- int nmap;
- struct prmap *prmaps;
- struct prmap *prmap;
- struct stat sbuf;
-
- if (!summary)
+ if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */
{
- printf_filtered ("Mapped address spaces:\n\n");
-#ifdef BFD_HOST_64_BIT
- printf_filtered (" %18s %18s %10s %10s %7s\n",
-#else
- printf_filtered ("\t%10s %10s %10s %10s %7s\n",
-#endif
- "Start Addr",
- " End Addr",
- " Size",
- " Offset",
- "Flags");
-#ifdef PROCFS_USE_READ_WRITE
- if (fstat (pip->map_fd, &sbuf) == 0)
- {
- nmap = sbuf.st_size / sizeof (prmap_t);
- prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
- if ((lseek (pip->map_fd, 0, SEEK_SET) == 0) &&
- (read (pip->map_fd, (char *) prmaps,
- nmap * sizeof (*prmaps)) == (nmap * sizeof (*prmaps))))
- {
- int i = 0;
- for (prmap = prmaps; i < nmap; ++prmap, ++i)
-#else
- if (ioctl (pip->ctl_fd, PIOCNMAP, &nmap) == 0)
- {
- prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
- if (ioctl (pip->ctl_fd, PIOCMAP, prmaps) == 0)
- {
- for (prmap = prmaps; prmap->pr_size; ++prmap)
-#endif /* PROCFS_USE_READ_WRITE */
- {
-#ifdef BFD_HOST_64_BIT
- printf_filtered (" %#18lx %#18lx %#10x %#10x %7s\n",
-#else
- printf_filtered ("\t%#10lx %#10lx %#10x %#10x %7s\n",
-#endif
- (unsigned long) prmap->pr_vaddr,
- (unsigned long) prmap->pr_vaddr
- + prmap->pr_size - 1,
- prmap->pr_size,
- prmap->pr_off,
- mappingflags (prmap->pr_mflags));
- }
- }
- }
- printf_filtered ("\n");
+ /* Find procinfo for main process */
+ procinfo *pi = find_procinfo (PIDGET (inferior_ptid), 0);
+
+ if (pi)
+ unconditionally_kill_inferior (pi);
+ target_mourn_inferior ();
}
}
/*
+ * Function: target_mourn_inferior
+ *
+ * Forget we ever debugged this thing!
+ */
+
+static void
+procfs_mourn_inferior (void)
+{
+ procinfo *pi;
+
+ if (!ptid_equal (inferior_ptid, null_ptid))
+ {
+ /* Find procinfo for main process */
+ pi = find_procinfo (PIDGET (inferior_ptid), 0);
+ if (pi)
+ destroy_procinfo (pi);
+ }
+ unpush_target (&procfs_ops);
- LOCAL FUNCTION
+ if (dbx_link_bpt != NULL)
+ {
+ deprecated_remove_raw_breakpoint (dbx_link_bpt);
+ dbx_link_bpt_addr = 0;
+ dbx_link_bpt = NULL;
+ }
- info_proc -- implement the "info proc" command
+ generic_mourn_inferior ();
+}
- SYNOPSIS
+/*
+ * Function: init_inferior
+ *
+ * When GDB forks to create a runnable inferior process,
+ * this function is called on the parent side of the fork.
+ * It's job is to do whatever is necessary to make the child
+ * ready to be debugged, and then wait for the child to synchronize.
+ */
- void info_proc (char *args, int from_tty)
+static void
+procfs_init_inferior (int pid)
+{
+ procinfo *pi;
+ gdb_sigset_t signals;
+ int fail;
- DESCRIPTION
+ /* This routine called on the parent side (GDB side)
+ after GDB forks the inferior. */
- Implement gdb's "info proc" command by using the /proc interface
- to print status information about any currently running process.
+ push_target (&procfs_ops);
- Examples of the use of "info proc" are:
+ if ((pi = create_procinfo (pid, 0)) == NULL)
+ perror ("procfs: out of memory in 'init_inferior'");
+
+ if (!open_procinfo_files (pi, FD_CTL))
+ proc_error (pi, "init_inferior, open_proc_files", __LINE__);
+
+ /*
+ xmalloc // done
+ open_procinfo_files // done
+ link list // done
+ prfillset (trace)
+ procfs_notice_signals
+ prfillset (fault)
+ prdelset (FLTPAGE)
+ PIOCWSTOP
+ PIOCSFAULT
+ */
+
+ /* If not stopped yet, wait for it to stop. */
+ if (!(proc_flags (pi) & PR_STOPPED) &&
+ !(proc_wait_for_stop (pi)))
+ dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL);
+
+ /* Save some of the /proc state to be restored if we detach. */
+ /* FIXME: Why? In case another debugger was debugging it?
+ We're it's parent, for Ghu's sake! */
+ if (!proc_get_traced_signals (pi, &pi->saved_sigset))
+ proc_error (pi, "init_inferior, get_traced_signals", __LINE__);
+ if (!proc_get_held_signals (pi, &pi->saved_sighold))
+ proc_error (pi, "init_inferior, get_held_signals", __LINE__);
+ if (!proc_get_traced_faults (pi, &pi->saved_fltset))
+ proc_error (pi, "init_inferior, get_traced_faults", __LINE__);
+ if (!proc_get_traced_sysentry (pi, pi->saved_entryset))
+ proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__);
+ if (!proc_get_traced_sysexit (pi, pi->saved_exitset))
+ proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__);
+
+ /* Register to trace selected signals in the child. */
+ prfillset (&signals);
+ if (!register_gdb_signals (pi, &signals))
+ proc_error (pi, "init_inferior, register_signals", __LINE__);
+
+ if ((fail = procfs_debug_inferior (pi)) != 0)
+ proc_error (pi, "init_inferior (procfs_debug_inferior)", fail);
+
+ /* FIXME: logically, we should really be turning OFF run-on-last-close,
+ and possibly even turning ON kill-on-last-close at this point. But
+ I can't make that change without careful testing which I don't have
+ time to do right now... */
+ /* Turn on run-on-last-close flag so that the child
+ will die if GDB goes away for some reason. */
+ if (!proc_set_run_on_last_close (pi))
+ proc_error (pi, "init_inferior, set_RLC", __LINE__);
+
+ /* The 'process ID' we return to GDB is composed of
+ the actual process ID plus the lwp ID. */
+ inferior_ptid = MERGEPID (pi->pid, proc_get_current_thread (pi));
+
+ /* Typically two, one trap to exec the shell, one to exec the
+ program being debugged. Defined by "inferior.h". */
+ startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
- info proc (prints summary info for current inferior)
- info proc 123 (prints summary info for process with pid 123)
- info proc mappings (prints address mappings)
- info proc times (prints process/children times)
- info proc id (prints pid, ppid, gid, sid, etc)
- FIXME: i proc id not implemented.
- info proc status (prints general process state info)
- FIXME: i proc status not implemented.
- info proc signals (prints info about signal handling)
- info proc all (prints all info)
+#ifdef SYS_syssgi
+ /* On mips-irix, we need to stop the inferior early enough during
+ the startup phase in order to be able to load the shared library
+ symbols and insert the breakpoints that are located in these shared
+ libraries. Stopping at the program entry point is not good enough
+ because the -init code is executed before the execution reaches
+ that point.
+
+ So what we need to do is to insert a breakpoint in the runtime
+ loader (rld), more precisely in __dbx_link(). This procedure is
+ called by rld once all shared libraries have been mapped, but before
+ the -init code is executed. Unfortuantely, this is not straightforward,
+ as rld is not part of the executable we are running, and thus we need
+ the inferior to run until rld itself has been mapped in memory.
+
+ For this, we trace all syssgi() syscall exit events. Each time
+ we detect such an event, we iterate over each text memory maps,
+ get its associated fd, and scan the symbol table for __dbx_link().
+ When found, we know that rld has been mapped, and that we can insert
+ the breakpoint at the symbol address. Once the dbx_link() breakpoint
+ has been inserted, the syssgi() notifications are no longer necessary,
+ so they should be canceled. */
+ proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0);
+#endif
+}
+/*
+ * Function: set_exec_trap
+ *
+ * When GDB forks to create a new process, this function is called
+ * on the child side of the fork before GDB exec's the user program.
+ * Its job is to make the child minimally debuggable, so that the
+ * parent GDB process can connect to the child and take over.
+ * This function should do only the minimum to make that possible,
+ * and to synchronize with the parent process. The parent process
+ * should take care of the details.
*/
static void
-info_proc (args, from_tty)
- char *args;
- int from_tty;
+procfs_set_exec_trap (void)
{
- int pid;
- struct procinfo *pip;
- struct cleanup *old_chain;
- char **argv;
- int argsize;
- int summary = 1;
- int flags = 0;
- int syscalls = 0;
- int signals = 0;
- int faults = 0;
- int mappings = 0;
- int times = 0;
- int id = 0;
- int status = 0;
- int all = 0;
- int nlwp;
- int *lwps;
+ /* This routine called on the child side (inferior side)
+ after GDB forks the inferior. It must use only local variables,
+ because it may be sharing data space with its parent. */
- old_chain = make_cleanup (null_cleanup, 0);
-
- /* Default to using the current inferior if no pid specified. Note
- that inferior_pid may be 0, hence we set okerr. */
+ procinfo *pi;
+ sysset_t *exitset;
- pid = inferior_pid & 0x7fffffff; /* strip off sol-thread bit */
- if (!(pip = find_procinfo (pid, 1))) /* inferior_pid no good? */
- pip = procinfo_list; /* take first available */
- pid = pid & 0xffff; /* extract "real" pid */
+ if ((pi = create_procinfo (getpid (), 0)) == NULL)
+ perror_with_name (_("procfs: create_procinfo failed in child."));
- if (args != NULL)
+ if (open_procinfo_files (pi, FD_CTL) == 0)
{
- if ((argv = buildargv (args)) == NULL)
- {
- nomem (0);
- }
- make_cleanup_freeargv (argv);
+ proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__);
+ gdb_flush (gdb_stderr);
+ /* no need to call "dead_procinfo", because we're going to exit. */
+ _exit (127);
+ }
- while (*argv != NULL)
- {
- argsize = strlen (*argv);
- if (argsize >= 1 && strncmp (*argv, "all", argsize) == 0)
- {
- summary = 0;
- all = 1;
- }
- else if (argsize >= 2 && strncmp (*argv, "faults", argsize) == 0)
- {
- summary = 0;
- faults = 1;
- }
- else if (argsize >= 2 && strncmp (*argv, "flags", argsize) == 0)
- {
- summary = 0;
- flags = 1;
- }
- else if (argsize >= 1 && strncmp (*argv, "id", argsize) == 0)
- {
- summary = 0;
- id = 1;
- }
- else if (argsize >= 1 && strncmp (*argv, "mappings", argsize) == 0)
- {
- summary = 0;
- mappings = 1;
- }
- else if (argsize >= 2 && strncmp (*argv, "signals", argsize) == 0)
- {
- summary = 0;
- signals = 1;
- }
- else if (argsize >= 2 && strncmp (*argv, "status", argsize) == 0)
- {
- summary = 0;
- status = 1;
- }
- else if (argsize >= 2 && strncmp (*argv, "syscalls", argsize) == 0)
- {
- summary = 0;
- syscalls = 1;
- }
- else if (argsize >= 1 && strncmp (*argv, "times", argsize) == 0)
- {
- summary = 0;
- times = 1;
- }
- else if ((pid = atoi (*argv)) > 0)
- {
- pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
- memset (pip, 0, sizeof (*pip));
+#ifdef PRFS_STOPEXEC /* defined on OSF */
+ /* OSF method for tracing exec syscalls. Quoting:
+ Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace
+ exits from exec system calls because of the user level loader. */
+ /* FIXME: make nice and maybe move into an access function. */
+ {
+ int prfs_flags;
- pip->pid = pid;
- if (!open_proc_file (pid, pip, O_RDONLY, 0))
- {
- perror_with_name (pip->pathname);
- /* NOTREACHED */
- }
- pid = pip->pid;
- make_cleanup_close_proc_file (pip);
- }
- else if (**argv != '\000')
- {
- error ("Unrecognized or ambiguous keyword `%s'.", *argv);
- }
- argv++;
- }
- }
+ if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0)
+ {
+ proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__);
+ gdb_flush (gdb_stderr);
+ _exit (127);
+ }
+ prfs_flags |= PRFS_STOPEXEC;
+
+ if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0)
+ {
+ proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__);
+ gdb_flush (gdb_stderr);
+ _exit (127);
+ }
+ }
+#else /* not PRFS_STOPEXEC */
+ /* Everyone else's (except OSF) method for tracing exec syscalls */
+ /* GW: Rationale...
+ Not all systems with /proc have all the exec* syscalls with the same
+ names. On the SGI, for example, there is no SYS_exec, but there
+ *is* a SYS_execv. So, we try to account for that. */
+
+ exitset = sysset_t_alloc (pi);
+ gdb_premptysysset (exitset);
+#ifdef SYS_exec
+ gdb_praddsysset (exitset, SYS_exec);
+#endif
+#ifdef SYS_execve
+ gdb_praddsysset (exitset, SYS_execve);
+#endif
+#ifdef SYS_execv
+ gdb_praddsysset (exitset, SYS_execv);
+#endif
+#ifdef DYNAMIC_SYSCALLS
+ {
+ int callnum = find_syscall (pi, "execve");
- /* If we don't have a valid open process at this point, then we have no
- inferior or didn't specify a specific pid. */
+ if (callnum >= 0)
+ gdb_praddsysset (exitset, callnum);
- if (!pip)
- {
- error ("\
-No process. Start debugging a program or specify an explicit process ID.");
- }
+ callnum = find_syscall (pi, "ra_execve");
+ if (callnum >= 0)
+ gdb_praddsysset (exitset, callnum);
+ }
+#endif /* DYNAMIC_SYSCALLS */
- if (!procfs_read_status (pip))
+ if (!proc_set_traced_sysexit (pi, exitset))
{
- print_sys_errmsg (pip->pathname, errno);
- error ("procfs_read_status failed");
+ proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__);
+ gdb_flush (gdb_stderr);
+ _exit (127);
}
+#endif /* PRFS_STOPEXEC */
-#ifndef PROCFS_USE_READ_WRITE
-#ifdef PIOCLWPIDS
- nlwp = pip->prstatus.pr_nlwp;
- lwps = alloca ((2 * nlwp + 2) * sizeof (*lwps));
+ /* FIXME: should this be done in the parent instead? */
+ /* Turn off inherit on fork flag so that all grand-children
+ of gdb start with tracing flags cleared. */
+ if (!proc_unset_inherit_on_fork (pi))
+ proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__);
+
+ /* Turn off run on last close flag, so that the child process
+ cannot run away just because we close our handle on it.
+ We want it to wait for the parent to attach. */
+ if (!proc_unset_run_on_last_close (pi))
+ proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__);
+
+ /* FIXME: No need to destroy the procinfo --
+ we have our own address space, and we're about to do an exec! */
+ /*destroy_procinfo (pi);*/
+}
- if (ioctl (pip->ctl_fd, PIOCLWPIDS, lwps))
- {
- print_sys_errmsg (pip->pathname, errno);
- error ("PIOCLWPIDS failed");
- }
-#else /* PIOCLWPIDS */
- nlwp = 1;
- lwps = alloca ((2 * nlwp + 2) * sizeof *lwps);
- lwps[0] = 0;
-#endif /* PIOCLWPIDS */
+/*
+ * Function: create_inferior
+ *
+ * This function is called BEFORE gdb forks the inferior process.
+ * Its only real responsibility is to set things up for the fork,
+ * and tell GDB which two functions to call after the fork (one
+ * for the parent, and one for the child).
+ *
+ * This function does a complicated search for a unix shell program,
+ * which it then uses to parse arguments and environment variables
+ * to be sent to the child. I wonder whether this code could not
+ * be abstracted out and shared with other unix targets such as
+ * infptrace?
+ */
- for (; nlwp > 0; nlwp--, lwps++)
+static void
+procfs_create_inferior (char *exec_file, char *allargs, char **env,
+ int from_tty)
+{
+ char *shell_file = getenv ("SHELL");
+ char *tryname;
+ if (shell_file != NULL && strchr (shell_file, '/') == NULL)
{
- pip = find_procinfo ((*lwps << 16) | pid, 1);
-
- if (!pip)
- {
- pip = (struct procinfo *) xmalloc (sizeof (struct procinfo));
- memset (pip, 0, sizeof (*pip));
- if (!open_proc_file ((*lwps << 16) | pid, pip, O_RDONLY, 0))
- continue;
- make_cleanup_close_proc_file (pip);
-
- if (!procfs_read_status (pip))
- {
- print_sys_errmsg (pip->pathname, errno);
- error ("procfs_read_status failed");
- }
- }
+ /* We will be looking down the PATH to find shell_file. If we
+ just do this the normal way (via execlp, which operates by
+ attempting an exec for each element of the PATH until it
+ finds one which succeeds), then there will be an exec for
+ each failed attempt, each of which will cause a PR_SYSEXIT
+ stop, and we won't know how to distinguish the PR_SYSEXIT's
+ for these failed execs with the ones for successful execs
+ (whether the exec has succeeded is stored at that time in the
+ carry bit or some such architecture-specific and
+ non-ABI-specified place).
+
+ So I can't think of anything better than to search the PATH
+ now. This has several disadvantages: (1) There is a race
+ condition; if we find a file now and it is deleted before we
+ exec it, we lose, even if the deletion leaves a valid file
+ further down in the PATH, (2) there is no way to know exactly
+ what an executable (in the sense of "capable of being
+ exec'd") file is. Using access() loses because it may lose
+ if the caller is the superuser; failing to use it loses if
+ there are ACLs or some such. */
-#endif /* PROCFS_USE_READ_WRITE */
+ char *p;
+ char *p1;
+ /* FIXME-maybe: might want "set path" command so user can change what
+ path is used from within GDB. */
+ char *path = getenv ("PATH");
+ int len;
+ struct stat statbuf;
- /* Print verbose information of the requested type(s), or just a summary
- of the information for all types. */
+ if (path == NULL)
+ path = "/bin:/usr/bin";
- printf_filtered ("\nInformation for %s.%d:\n\n", pip->pathname, *lwps);
- if (summary || all || flags)
- {
- info_proc_flags (pip, summary);
- }
- if (summary || all)
- {
- info_proc_stop (pip, summary);
-#ifdef UNIXWARE
- supply_gregset (&pip->prstatus.pr_lwp.pr_context.uc_mcontext.gregs);
-#else
- supply_gregset (&pip->prstatus.pr_reg);
-#endif
- printf_filtered ("PC: ");
- print_address (read_pc (), gdb_stdout);
- printf_filtered ("\n");
- }
- if (summary || all || signals || faults)
- {
- info_proc_siginfo (pip, summary);
- }
- if (summary || all || syscalls)
- {
- info_proc_syscalls (pip, summary);
- }
- if (summary || all || mappings)
- {
- info_proc_mappings (pip, summary);
- }
- if (summary || all || signals)
- {
- info_proc_signals (pip, summary);
- }
- if (summary || all || faults)
+ tryname = alloca (strlen (path) + strlen (shell_file) + 2);
+ for (p = path; p != NULL; p = p1 ? p1 + 1: NULL)
{
- info_proc_faults (pip, summary);
+ p1 = strchr (p, ':');
+ if (p1 != NULL)
+ len = p1 - p;
+ else
+ len = strlen (p);
+ strncpy (tryname, p, len);
+ tryname[len] = '\0';
+ strcat (tryname, "/");
+ strcat (tryname, shell_file);
+ if (access (tryname, X_OK) < 0)
+ continue;
+ if (stat (tryname, &statbuf) < 0)
+ continue;
+ if (!S_ISREG (statbuf.st_mode))
+ /* We certainly need to reject directories. I'm not quite
+ as sure about FIFOs, sockets, etc., but I kind of doubt
+ that people want to exec() these things. */
+ continue;
+ break;
}
- printf_filtered ("\n");
-
- /* All done, deal with closing any temporary process info structure,
- freeing temporary memory , etc. */
+ if (p == NULL)
+ /* Not found. This must be an error rather than merely passing
+ the file to execlp(), because execlp() would try all the
+ exec()s, causing GDB to get confused. */
+ error (_("procfs:%d -- Can't find shell %s in PATH"),
+ __LINE__, shell_file);
- do_cleanups (old_chain);
-#ifndef PROCFS_USE_READ_WRITE
+ shell_file = tryname;
}
+
+ fork_inferior (exec_file, allargs, env, procfs_set_exec_trap,
+ procfs_init_inferior, NULL, shell_file);
+
+#ifdef SYS_syssgi
+ /* Make sure to cancel the syssgi() syscall-exit notifications.
+ They should normally have been removed by now, but they may still
+ be activated if the inferior doesn't use shared libraries, or if
+ we didn't locate __dbx_link, or if we never stopped in __dbx_link.
+ See procfs_init_inferior() for more details. */
+ proc_trace_syscalls_1 (find_procinfo_or_die (PIDGET (inferior_ptid), 0),
+ SYS_syssgi, PR_SYSEXIT, FLAG_RESET, 0);
#endif
}
/*
+ * Function: notice_thread
+ *
+ * Callback for find_new_threads.
+ * Calls "add_thread".
+ */
- LOCAL FUNCTION
+static int
+procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr)
+{
+ ptid_t gdb_threadid = MERGEPID (pi->pid, thread->tid);
- modify_inherit_on_fork_flag - Change the inherit-on-fork flag
+ if (!in_thread_list (gdb_threadid))
+ add_thread (gdb_threadid);
- SYNOPSIS
+ return 0;
+}
- void modify_inherit_on_fork_flag (fd, flag)
+/*
+ * Function: target_find_new_threads
+ *
+ * Query all the threads that the target knows about,
+ * and give them back to GDB to add to its list.
+ */
- DESCRIPTION
+void
+procfs_find_new_threads (void)
+{
+ procinfo *pi;
- Call this routine to modify the inherit-on-fork flag. This routine is
- just a nice wrapper to hide the #ifdefs needed by various systems to
- control this flag.
+ /* Find procinfo for main process */
+ pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
+ proc_update_threads (pi);
+ proc_iterate_over_threads (pi, procfs_notice_thread, NULL);
+}
+/*
+ * Function: target_thread_alive
+ *
+ * Return true if the thread is still 'alive'.
+ *
+ * This guy doesn't really seem to be doing his job.
+ * Got to investigate how to tell when a thread is really gone.
*/
-static void
-modify_inherit_on_fork_flag (fd, flag)
- int fd;
- int flag;
+static int
+procfs_thread_alive (ptid_t ptid)
{
-#if defined (PIOCSET) || defined (PCSET)
- long pr_flags;
-#endif
- int retval = 0;
- struct proc_ctl pctl;
+ int proc, thread;
+ procinfo *pi;
-#if defined (PIOCSET) || defined (PCSET) /* New method */
- pr_flags = PR_FORK;
- if (flag)
- {
-#ifdef PROCFS_USE_READ_WRITE
- pctl.cmd = PCSET;
- pctl.data = PR_FORK;
- if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
- retval = -1;
-#else
- retval = ioctl (fd, PIOCSET, &pr_flags);
-#endif
- }
- else
- {
-#ifdef PROCFS_USE_READ_WRITE
- pctl.cmd = PCRESET;
- pctl.data = PR_FORK;
- if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
- retval = -1;
-#else
- retval = ioctl (fd, PIOCRESET, &pr_flags);
-#endif
- }
+ proc = PIDGET (ptid);
+ thread = TIDGET (ptid);
+ /* If I don't know it, it ain't alive! */
+ if ((pi = find_procinfo (proc, thread)) == NULL)
+ return 0;
-#else
-#ifdef PIOCSFORK /* Original method */
- if (flag)
- {
- retval = ioctl (fd, PIOCSFORK, NULL);
- }
- else
+ /* If I can't get its status, it ain't alive!
+ What's more, I need to forget about it! */
+ if (!proc_get_status (pi))
{
- retval = ioctl (fd, PIOCRFORK, NULL);
+ destroy_procinfo (pi);
+ return 0;
}
-#else
- Neither PR_FORK nor PIOCSFORK exist ! !!
-#endif
-#endif
-
- if (!retval)
- return;
-
- print_sys_errmsg ("modify_inherit_on_fork_flag", errno);
- error ("PIOCSFORK or PR_FORK modification failed");
+ /* I couldn't have got its status if it weren't alive, so it's alive. */
+ return 1;
}
-/*
-
- LOCAL FUNCTION
-
- modify_run_on_last_close_flag - Change the run-on-last-close flag
-
- SYNOPSIS
+/* Convert PTID to a string. Returns the string in a static buffer. */
- void modify_run_on_last_close_flag (fd, flag)
+char *
+procfs_pid_to_str (ptid_t ptid)
+{
+ static char buf[80];
- DESCRIPTION
+ if (TIDGET (ptid) == 0)
+ sprintf (buf, "process %d", PIDGET (ptid));
+ else
+ sprintf (buf, "LWP %ld", TIDGET (ptid));
- Call this routine to modify the run-on-last-close flag. This routine
- is just a nice wrapper to hide the #ifdefs needed by various systems to
- control this flag.
+ return buf;
+}
+/*
+ * Function: procfs_set_watchpoint
+ * Insert a watchpoint
*/
-static void
-modify_run_on_last_close_flag (fd, flag)
- int fd;
- int flag;
+int
+procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag,
+ int after)
{
-#if defined (PIOCSET) || defined (PCSET)
- long pr_flags;
-#endif
- int retval = 0;
- struct proc_ctl pctl;
+#ifndef UNIXWARE
+#ifndef AIX5
+ int pflags = 0;
+ procinfo *pi;
+
+ pi = find_procinfo_or_die (PIDGET (ptid) == -1 ?
+ PIDGET (inferior_ptid) : PIDGET (ptid), 0);
-#if defined (PIOCSET) || defined (PCSET) /* New method */
- pr_flags = PR_RLC;
- if (flag)
+ /* Translate from GDB's flags to /proc's */
+ if (len > 0) /* len == 0 means delete watchpoint */
{
-#ifdef PROCFS_USE_READ_WRITE
- pctl.cmd = PCSET;
- pctl.data = PR_RLC;
- if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
- retval = -1;
-#else
- retval = ioctl (fd, PIOCSET, &pr_flags);
-#endif
+ switch (rwflag) { /* FIXME: need an enum! */
+ case hw_write: /* default watchpoint (write) */
+ pflags = WRITE_WATCHFLAG;
+ break;
+ case hw_read: /* read watchpoint */
+ pflags = READ_WATCHFLAG;
+ break;
+ case hw_access: /* access watchpoint */
+ pflags = READ_WATCHFLAG | WRITE_WATCHFLAG;
+ break;
+ case hw_execute: /* execution HW breakpoint */
+ pflags = EXEC_WATCHFLAG;
+ break;
+ default: /* Something weird. Return error. */
+ return -1;
+ }
+ if (after) /* Stop after r/w access is completed. */
+ pflags |= AFTER_WATCHFLAG;
}
- else
+
+ if (!proc_set_watchpoint (pi, addr, len, pflags))
{
-#ifdef PROCFS_USE_READ_WRITE
- pctl.cmd = PCRESET;
- pctl.data = PR_RLC;
- if (write (fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
- retval = -1;
-#else
- retval = ioctl (fd, PIOCRESET, &pr_flags);
-#endif
+ if (errno == E2BIG) /* Typical error for no resources */
+ return -1; /* fail */
+ /* GDB may try to remove the same watchpoint twice.
+ If a remove request returns no match, don't error. */
+ if (errno == ESRCH && len == 0)
+ return 0; /* ignore */
+ proc_error (pi, "set_watchpoint", __LINE__);
}
-
-#else
-#ifdef PIOCSRLC /* Original method */
- if (flag)
- retval = ioctl (fd, PIOCSRLC, NULL);
- else
- retval = ioctl (fd, PIOCRRLC, NULL);
-#else
- Neither PR_RLC nor PIOCSRLC exist ! !!
-#endif
-#endif
-
- if (!retval)
- return;
-
- print_sys_errmsg ("modify_run_on_last_close_flag", errno);
- error ("PIOCSRLC or PR_RLC modification failed");
+#endif /* AIX5 */
+#endif /* UNIXWARE */
+ return 0;
}
-/*
-
- LOCAL FUNCTION
+/* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE
+ is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint,
+ or bp_hardware_watchpoint. CNT is the number of watchpoints used so
+ far.
- procfs_clear_syscall_trap -- Deletes the trap for the specified system call.
+ Note: procfs_can_use_hw_breakpoint() is not yet used by all
+ procfs.c targets due to the fact that some of them still define
+ TARGET_CAN_USE_HARDWARE_WATCHPOINT. */
- SYNOPSIS
+static int
+procfs_can_use_hw_breakpoint (int type, int cnt, int othertype)
+{
+#ifndef TARGET_HAS_HARDWARE_WATCHPOINTS
+ return 0;
+#else
+ /* Due to the way that proc_set_watchpoint() is implemented, host
+ and target pointers must be of the same size. If they are not,
+ we can't use hardware watchpoints. This limitation is due to the
+ fact that proc_set_watchpoint() calls
+ procfs_address_to_host_pointer(); a close inspection of
+ procfs_address_to_host_pointer will reveal that an internal error
+ will be generated when the host and target pointer sizes are
+ different. */
+ if (sizeof (void *) != TYPE_LENGTH (builtin_type_void_data_ptr))
+ return 0;
- void procfs_clear_syscall_trap (struct procinfo *, int syscall_num, int errok)
+ /* Other tests here??? */
- DESCRIPTION
+ return 1;
+#endif
+}
- This function function disables traps for the specified system call.
- errok is non-zero if errors should be ignored.
+/*
+ * Function: stopped_by_watchpoint
+ *
+ * Returns non-zero if process is stopped on a hardware watchpoint fault,
+ * else returns zero.
*/
-static void
-procfs_clear_syscall_trap (pi, syscall_num, errok)
- struct procinfo *pi;
- int syscall_num;
- int errok;
+int
+procfs_stopped_by_watchpoint (ptid_t ptid)
{
- sysset_t sysset;
- int goterr, i;
+ procinfo *pi;
-#ifndef UNIXWARE
- goterr = ioctl (pi->ctl_fd, PIOCGENTRY, &sysset) < 0;
+ pi = find_procinfo_or_die (PIDGET (ptid) == -1 ?
+ PIDGET (inferior_ptid) : PIDGET (ptid), 0);
- if (goterr && !errok)
- {
- print_sys_errmsg (pi->pathname, errno);
- error ("PIOCGENTRY failed");
- }
+ if (!pi) /* If no process, then not stopped by watchpoint! */
+ return 0;
- if (!goterr)
+ if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))
{
- prdelset (&sysset, syscall_num);
-
- if ((ioctl (pi->ctl_fd, PIOCSENTRY, &sysset) < 0) && !errok)
+ if (proc_why (pi) == PR_FAULTED)
{
- print_sys_errmsg (pi->pathname, errno);
- error ("PIOCSENTRY failed");
+#ifdef FLTWATCH
+ if (proc_what (pi) == FLTWATCH)
+ return 1;
+#endif
+#ifdef FLTKWATCH
+ if (proc_what (pi) == FLTKWATCH)
+ return 1;
+#endif
}
}
+ return 0;
+}
- goterr = ioctl (pi->ctl_fd, PIOCGEXIT, &sysset) < 0;
+#ifdef TM_I386SOL2_H
+/*
+ * Function: procfs_find_LDT_entry
+ *
+ * Input:
+ * ptid_t ptid; // The GDB-style pid-plus-LWP.
+ *
+ * Return:
+ * pointer to the corresponding LDT entry.
+ */
- if (goterr && !errok)
- {
- procfs_clear_syscall_trap (pi, syscall_num, 1);
- print_sys_errmsg (pi->pathname, errno);
- error ("PIOCGEXIT failed");
- }
+struct ssd *
+procfs_find_LDT_entry (ptid_t ptid)
+{
+ gdb_gregset_t *gregs;
+ int key;
+ procinfo *pi;
- if (!goterr)
+ /* Find procinfo for the lwp. */
+ if ((pi = find_procinfo (PIDGET (ptid), TIDGET (ptid))) == NULL)
{
- praddset (&sysset, syscall_num);
-
- if ((ioctl (pi->ctl_fd, PIOCSEXIT, &sysset) < 0) && !errok)
- {
- procfs_clear_syscall_trap (pi, syscall_num, 1);
- print_sys_errmsg (pi->pathname, errno);
- error ("PIOCSEXIT failed");
- }
+ warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%d."),
+ PIDGET (ptid), TIDGET (ptid));
+ return NULL;
}
-#endif
-
- if (!pi->syscall_handlers)
+ /* get its general registers. */
+ if ((gregs = proc_get_gregs (pi)) == NULL)
{
- if (!errok)
- error ("procfs_clear_syscall_trap: syscall_handlers is empty");
- return;
+ warning (_("procfs_find_LDT_entry: could not read gregs for %d:%d."),
+ PIDGET (ptid), TIDGET (ptid));
+ return NULL;
}
+ /* Now extract the GS register's lower 16 bits. */
+ key = (*gregs)[GS] & 0xffff;
- /* Remove handler func from the handler list */
-
- for (i = 0; i < pi->num_syscall_handlers; i++)
- if (pi->syscall_handlers[i].syscall_num == syscall_num)
- {
- if (i + 1 != pi->num_syscall_handlers)
- { /* Not the last entry.
- Move subsequent entries fwd. */
- memcpy (&pi->syscall_handlers[i], &pi->syscall_handlers[i + 1],
- (pi->num_syscall_handlers - i - 1)
- * sizeof (struct procfs_syscall_handler));
- }
-
- pi->syscall_handlers = xrealloc (pi->syscall_handlers,
- (pi->num_syscall_handlers - 1)
- * sizeof (struct procfs_syscall_handler));
- pi->num_syscall_handlers--;
- return;
- }
-
- if (!errok)
- error ("procfs_clear_syscall_trap: Couldn't find handler for sys call %d",
- syscall_num);
+ /* Find the matching entry and return it. */
+ return proc_get_LDT_entry (pi, key);
}
+#endif /* TM_I386SOL2_H */
/*
+ * Memory Mappings Functions:
+ */
- LOCAL FUNCTION
+/*
+ * Function: iterate_over_mappings
+ *
+ * Call a callback function once for each mapping, passing it the mapping,
+ * an optional secondary callback function, and some optional opaque data.
+ * Quit and return the first non-zero value returned from the callback.
+ *
+ * Arguments:
+ * pi -- procinfo struct for the process to be mapped.
+ * func -- callback function to be called by this iterator.
+ * data -- optional opaque data to be passed to the callback function.
+ * child_func -- optional secondary function pointer to be passed
+ * to the child function.
+ *
+ * Return: First non-zero return value from the callback function,
+ * or zero.
+ */
- procfs_set_syscall_trap -- arrange for a function to be called when the
- child executes the specified system call.
+static int
+iterate_over_mappings (procinfo *pi, int (*child_func) (), void *data,
+ int (*func) (struct prmap *map,
+ int (*child_func) (),
+ void *data))
+{
+ char pathname[MAX_PROC_NAME_SIZE];
+ struct prmap *prmaps;
+ struct prmap *prmap;
+ int funcstat;
+ int map_fd;
+ int nmap;
+#ifdef NEW_PROC_API
+ struct stat sbuf;
+#endif
- SYNOPSIS
+ /* Get the number of mappings, allocate space,
+ and read the mappings into prmaps. */
+#ifdef NEW_PROC_API
+ /* Open map fd. */
+ sprintf (pathname, "/proc/%d/map", pi->pid);
+ if ((map_fd = open (pathname, O_RDONLY)) < 0)
+ proc_error (pi, "iterate_over_mappings (open)", __LINE__);
- void procfs_set_syscall_trap (struct procinfo *, int syscall_num, int flags,
- syscall_func_t *function)
+ /* Make sure it gets closed again. */
+ make_cleanup_close (map_fd);
- DESCRIPTION
+ /* Use stat to determine the file size, and compute
+ the number of prmap_t objects it contains. */
+ if (fstat (map_fd, &sbuf) != 0)
+ proc_error (pi, "iterate_over_mappings (fstat)", __LINE__);
- This function sets up an entry and/or exit trap for the specified system
- call. When the child executes the specified system call, your function
- will be called with the call #, a flag that indicates entry or exit, and
- pointers to rtnval and statval (which are used by procfs_wait). The
- function should return non-zero if something interesting happened, zero
- otherwise.
- */
+ nmap = sbuf.st_size / sizeof (prmap_t);
+ prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
+ if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps))
+ != (nmap * sizeof (*prmaps)))
+ proc_error (pi, "iterate_over_mappings (read)", __LINE__);
+#else
+ /* Use ioctl command PIOCNMAP to get number of mappings. */
+ if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0)
+ proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__);
-static void
-procfs_set_syscall_trap (pi, syscall_num, flags, func)
- struct procinfo *pi;
- int syscall_num;
- int flags;
- syscall_func_t *func;
-{
- sysset_t sysset;
+ prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps));
+ if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0)
+ proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__);
+#endif
-#ifndef UNIXWARE
- if (flags & PROCFS_SYSCALL_ENTRY)
- {
- if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysset) < 0)
- {
- print_sys_errmsg (pi->pathname, errno);
- error ("PIOCGENTRY failed");
- }
+ for (prmap = prmaps; nmap > 0; prmap++, nmap--)
+ if ((funcstat = (*func) (prmap, child_func, data)) != 0)
+ return funcstat;
- praddset (&sysset, syscall_num);
+ return 0;
+}
- if (ioctl (pi->ctl_fd, PIOCSENTRY, &sysset) < 0)
- {
- print_sys_errmsg (pi->pathname, errno);
- error ("PIOCSENTRY failed");
- }
- }
+/*
+ * Function: solib_mappings_callback
+ *
+ * Calls the supplied callback function once for each mapped address
+ * space in the process. The callback function receives an open
+ * file descriptor for the file corresponding to that mapped
+ * address space (if there is one), and the base address of the
+ * mapped space. Quit when the callback function returns a
+ * nonzero value, or at teh end of the mappings.
+ *
+ * Returns: the first non-zero return value of the callback function,
+ * or zero.
+ */
- if (flags & PROCFS_SYSCALL_EXIT)
- {
- if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysset) < 0)
- {
- procfs_clear_syscall_trap (pi, syscall_num, 1);
- print_sys_errmsg (pi->pathname, errno);
- error ("PIOCGEXIT failed");
- }
+int solib_mappings_callback (struct prmap *map,
+ int (*func) (int, CORE_ADDR),
+ void *data)
+{
+ procinfo *pi = data;
+ int fd;
- praddset (&sysset, syscall_num);
+#ifdef NEW_PROC_API
+ char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)];
- if (ioctl (pi->ctl_fd, PIOCSEXIT, &sysset) < 0)
- {
- procfs_clear_syscall_trap (pi, syscall_num, 1);
- print_sys_errmsg (pi->pathname, errno);
- error ("PIOCSEXIT failed");
- }
- }
-#endif
+ if (map->pr_vaddr == 0 && map->pr_size == 0)
+ return -1; /* sanity */
- if (!pi->syscall_handlers)
+ if (map->pr_mapname[0] == 0)
{
- pi->syscall_handlers = xmalloc (sizeof (struct procfs_syscall_handler));
- pi->syscall_handlers[0].syscall_num = syscall_num;
- pi->syscall_handlers[0].func = func;
- pi->num_syscall_handlers = 1;
+ fd = -1; /* no map file */
}
else
{
- int i;
-
- for (i = 0; i < pi->num_syscall_handlers; i++)
- if (pi->syscall_handlers[i].syscall_num == syscall_num)
- {
- pi->syscall_handlers[i].func = func;
- return;
- }
-
- pi->syscall_handlers = xrealloc (pi->syscall_handlers, (i + 1)
- * sizeof (struct procfs_syscall_handler));
- pi->syscall_handlers[i].syscall_num = syscall_num;
- pi->syscall_handlers[i].func = func;
- pi->num_syscall_handlers++;
+ sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname);
+ /* Note: caller's responsibility to close this fd! */
+ fd = open_with_retry (name, O_RDONLY);
+ /* Note: we don't test the above call for failure;
+ we just pass the FD on as given. Sometimes there is
+ no file, so the open may return failure, but that's
+ not a problem. */
}
+#else
+ fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr);
+ /* Note: we don't test the above call for failure;
+ we just pass the FD on as given. Sometimes there is
+ no file, so the ioctl may return failure, but that's
+ not a problem. */
+#endif
+ return (*func) (fd, (CORE_ADDR) map->pr_vaddr);
+}
+
+/*
+ * Function: proc_iterate_over_mappings
+ *
+ * Uses the unified "iterate_over_mappings" function
+ * to implement the exported interface to solib-svr4.c.
+ *
+ * Given a pointer to a function, call that function once for every
+ * mapped address space in the process. The callback function
+ * receives an open file descriptor for the file corresponding to
+ * that mapped address space (if there is one), and the base address
+ * of the mapped space. Quit when the callback function returns a
+ * nonzero value, or at teh end of the mappings.
+ *
+ * Returns: the first non-zero return value of the callback function,
+ * or zero.
+ */
+
+int
+proc_iterate_over_mappings (int (*func) (int, CORE_ADDR))
+{
+ procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
+
+ return iterate_over_mappings (pi, func, pi, solib_mappings_callback);
+}
+
+/*
+ * Function: find_memory_regions_callback
+ *
+ * Implements the to_find_memory_regions method.
+ * Calls an external function for each memory region.
+ * External function will have the signiture:
+ *
+ * int callback (CORE_ADDR vaddr,
+ * unsigned long size,
+ * int read, int write, int execute,
+ * void *data);
+ *
+ * Returns the integer value returned by the callback.
+ */
+
+static int
+find_memory_regions_callback (struct prmap *map,
+ int (*func) (CORE_ADDR,
+ unsigned long,
+ int, int, int,
+ void *),
+ void *data)
+{
+ return (*func) ((CORE_ADDR) map->pr_vaddr,
+ map->pr_size,
+ (map->pr_mflags & MA_READ) != 0,
+ (map->pr_mflags & MA_WRITE) != 0,
+ (map->pr_mflags & MA_EXEC) != 0,
+ data);
}
-#ifdef SYS_lwp_create
+/*
+ * Function: proc_find_memory_regions
+ *
+ * External interface. Calls a callback function once for each
+ * mapped memory region in the child process, passing as arguments
+ * CORE_ADDR virtual_address,
+ * unsigned long size,
+ * int read, TRUE if region is readable by the child
+ * int write, TRUE if region is writable by the child
+ * int execute TRUE if region is executable by the child.
+ *
+ * Stops iterating and returns the first non-zero value
+ * returned by the callback.
+ */
+
+static int
+proc_find_memory_regions (int (*func) (CORE_ADDR,
+ unsigned long,
+ int, int, int,
+ void *),
+ void *data)
+{
+ procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
+
+ return iterate_over_mappings (pi, func, data,
+ find_memory_regions_callback);
+}
-/*
+/* Remove the breakpoint that we inserted in __dbx_link().
+ Does nothing if the breakpoint hasn't been inserted or has already
+ been removed. */
- LOCAL FUNCTION
+static void
+remove_dbx_link_breakpoint (void)
+{
+ if (dbx_link_bpt_addr == 0)
+ return;
- procfs_lwp_creation_handler - handle exit from the _lwp_create syscall
+ if (deprecated_remove_raw_breakpoint (dbx_link_bpt) != 0)
+ warning (_("Unable to remove __dbx_link breakpoint."));
- SYNOPSIS
+ dbx_link_bpt_addr = 0;
+ dbx_link_bpt = NULL;
+}
- int procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
+/* Return the address of the __dbx_link() function in the file
+ refernced by ABFD by scanning its symbol table. Return 0 if
+ the symbol was not found. */
- DESCRIPTION
+static CORE_ADDR
+dbx_link_addr (bfd *abfd)
+{
+ long storage_needed;
+ asymbol **symbol_table;
+ long number_of_symbols;
+ long i;
- This routine is called both when an inferior process and it's new lwp
- are about to finish a _lwp_create() system call. This is the system
- call that Solaris uses to create a lightweight process. When the
- target process gets this event, we can look at sysarg[2] to find the
- new childs lwp ID, and create a procinfo struct from that. After that,
- we pretend that we got a SIGTRAP, and return non-zero to tell
- procfs_wait to wake up. Subsequently, wait_for_inferior gets woken up,
- sees the new process and continues it.
+ storage_needed = bfd_get_symtab_upper_bound (abfd);
+ if (storage_needed <= 0)
+ return 0;
- When we see the child exiting from lwp_create, we just contine it,
- since everything was handled when the parent trapped.
+ symbol_table = (asymbol **) xmalloc (storage_needed);
+ make_cleanup (xfree, symbol_table);
- NOTES
- In effect, we are only paying attention to the parent's completion of
- the lwp_create syscall. If we only paid attention to the child
- instead, then we wouldn't detect the creation of a suspended thread.
- */
+ number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table);
-static int
-procfs_lwp_creation_handler (pi, syscall_num, why, rtnvalp, statvalp)
- struct procinfo *pi;
- int syscall_num;
- int why;
- int *rtnvalp;
- int *statvalp;
-{
- int lwp_id;
- struct procinfo *childpi;
- struct proc_ctl pctl;
+ for (i = 0; i < number_of_symbols; i++)
+ {
+ asymbol *sym = symbol_table[i];
- /* We've just detected the completion of an lwp_create system call. Now we
- need to setup a procinfo struct for this thread, and notify the thread
- system of the new arrival. */
+ if ((sym->flags & BSF_GLOBAL)
+ && sym->name != NULL && strcmp (sym->name, "__dbx_link") == 0)
+ return (sym->value + sym->section->vma);
+ }
- /* If lwp_create failed, then nothing interesting happened. Continue the
- process and go back to sleep. */
+ /* Symbol not found, return NULL. */
+ return 0;
+}
-#ifdef UNIXWARE
- /* Joel ... can you check this logic out please? JKJ */
- if (pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs[R_EFL] & 1)
- { /* _lwp_create failed */
- pctl.cmd = PCRUN;
- pctl.data = PRCFAULT;
+/* Search the symbol table of the file referenced by FD for a symbol
+ named __dbx_link(). If found, then insert a breakpoint at this location,
+ and return nonzero. Return zero otherwise. */
- if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
- perror_with_name (pi->pathname);
+static int
+insert_dbx_link_bpt_in_file (int fd, CORE_ADDR ignored)
+{
+ bfd *abfd;
+ long storage_needed;
+ CORE_ADDR sym_addr;
+ abfd = bfd_fdopenr ("unamed", 0, fd);
+ if (abfd == NULL)
+ {
+ warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ()));
return 0;
}
-#else /* UNIXWARE */
- if (PROCFS_GET_CARRY (pi->prstatus.pr_reg))
- { /* _lwp_create failed */
- pi->prrun.pr_flags &= PRSTEP;
- pi->prrun.pr_flags |= PRCFAULT;
-
- if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
- perror_with_name (pi->pathname);
+ if (!bfd_check_format (abfd, bfd_object))
+ {
+ /* Not the correct format, so we can not possibly find the dbx_link
+ symbol in it. */
+ bfd_close (abfd);
return 0;
}
-#endif
-
- /* At this point, the new thread is stopped at it's first instruction, and
- the parent is stopped at the exit from lwp_create. */
- if (pi->new_child) /* Child? */
- { /* Yes, just continue it */
-#ifdef UNIXWARE
- pctl.cmd = PCRUN;
- pctl.data = PRCFAULT;
-
- if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
-#else /* !UNIXWARE */
- pi->prrun.pr_flags &= PRSTEP;
- pi->prrun.pr_flags |= PRCFAULT;
-
- if ((pi->prstatus.pr_flags & PR_ISTOP)
- && ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
-#endif /* !UNIXWARE */
- perror_with_name (pi->pathname);
-
- pi->new_child = 0; /* No longer new */
-
- return 0;
+ sym_addr = dbx_link_addr (abfd);
+ if (sym_addr != 0)
+ {
+ /* Insert the breakpoint. */
+ dbx_link_bpt_addr = sym_addr;
+ dbx_link_bpt = deprecated_insert_raw_breakpoint (sym_addr);
+ if (dbx_link_bpt == NULL)
+ {
+ warning (_("Failed to insert dbx_link breakpoint."));
+ bfd_close (abfd);
+ return 0;
+ }
+ bfd_close (abfd);
+ return 1;
}
- /* We're the proud parent of a new thread. Setup an exit trap for lwp_create
- in the child and continue the parent. */
+ bfd_close (abfd);
+ return 0;
+}
- /* Third arg is pointer to new thread id. */
- lwp_id = read_memory_integer (
- THE_PR_LWP (pi->prstatus).pr_sysarg[2], sizeof (int));
+/* If the given memory region MAP contains a symbol named __dbx_link,
+ insert a breakpoint at this location and return nonzero. Return
+ zero otherwise. */
- lwp_id = (lwp_id << 16) | PIDGET (pi->pid);
+static int
+insert_dbx_link_bpt_in_region (struct prmap *map,
+ int (*child_func) (),
+ void *data)
+{
+ procinfo *pi = (procinfo *) data;
+
+ /* We know the symbol we're looking for is in a text region, so
+ only look for it if the region is a text one. */
+ if (map->pr_mflags & MA_EXEC)
+ return solib_mappings_callback (map, insert_dbx_link_bpt_in_file, pi);
+
+ return 0;
+}
- childpi = create_procinfo (lwp_id);
+/* Search all memory regions for a symbol named __dbx_link. If found,
+ insert a breakpoint at its location, and return nonzero. Return zero
+ otherwise. */
- /* The new process has actually inherited the lwp_create syscall trap from
- it's parent, but we still have to call this to register handlers for
- that child. */
+static int
+insert_dbx_link_breakpoint (procinfo *pi)
+{
+ return iterate_over_mappings (pi, NULL, pi, insert_dbx_link_bpt_in_region);
+}
- procfs_set_inferior_syscall_traps (childpi);
- add_thread (lwp_id);
- printf_filtered ("[New %s]\n", target_pid_to_str (lwp_id));
+/*
+ * Function: mappingflags
+ *
+ * Returns an ascii representation of a memory mapping's flags.
+ */
- /* Continue the parent */
-#ifdef UNIXWARE
- pctl.cmd = PCRUN;
- pctl.data = PRCFAULT;
+static char *
+mappingflags (long flags)
+{
+ static char asciiflags[8];
- if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
-#else
- pi->prrun.pr_flags &= PRSTEP;
- pi->prrun.pr_flags |= PRCFAULT;
- if (ioctl (pi->ctl_fd, PIOCRUN, &pi->prrun) != 0)
+ strcpy (asciiflags, "-------");
+#if defined (MA_PHYS)
+ if (flags & MA_PHYS)
+ asciiflags[0] = 'd';
#endif
- perror_with_name (pi->pathname);
+ if (flags & MA_STACK)
+ asciiflags[1] = 's';
+ if (flags & MA_BREAK)
+ asciiflags[2] = 'b';
+ if (flags & MA_SHARED)
+ asciiflags[3] = 's';
+ if (flags & MA_READ)
+ asciiflags[4] = 'r';
+ if (flags & MA_WRITE)
+ asciiflags[5] = 'w';
+ if (flags & MA_EXEC)
+ asciiflags[6] = 'x';
+ return (asciiflags);
+}
+
+/*
+ * Function: info_mappings_callback
+ *
+ * Callback function, does the actual work for 'info proc mappings'.
+ */
- /* The new child may have been created in one of two states:
- SUSPENDED or RUNNABLE. If runnable, we will simply signal it to run.
- If suspended, we flag it to be continued later, when it has an event. */
+static int
+info_mappings_callback (struct prmap *map, int (*ignore) (), void *unused)
+{
+ char *data_fmt_string;
- if (THE_PR_LWP (childpi->prstatus).pr_why == PR_SUSPENDED)
- childpi->new_child = 1; /* Flag this as an unseen child process */
+ if (gdbarch_addr_bit (current_gdbarch) == 32)
+ data_fmt_string = "\t%#10lx %#10lx %#10x %#10x %7s\n";
else
- {
- /* Continue the child */
-#ifdef UNIXWARE
- pctl.cmd = PCRUN;
- pctl.data = PRCFAULT;
-
- if (write (pi->ctl_fd, (char *) &pctl, sizeof (struct proc_ctl)) < 0)
+ data_fmt_string = " %#18lx %#18lx %#10x %#10x %7s\n";
+
+ printf_filtered (data_fmt_string,
+ (unsigned long) map->pr_vaddr,
+ (unsigned long) map->pr_vaddr + map->pr_size - 1,
+ map->pr_size,
+#ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */
+ (unsigned int) map->pr_offset,
#else
- childpi->prrun.pr_flags &= PRSTEP;
- childpi->prrun.pr_flags |= PRCFAULT;
-
- if (ioctl (childpi->ctl_fd, PIOCRUN, &childpi->prrun) != 0)
+ map->pr_off,
#endif
- perror_with_name (childpi->pathname);
- }
+ mappingflags (map->pr_mflags));
+
return 0;
}
-#endif /* SYS_lwp_create */
-/* Fork an inferior process, and start debugging it with /proc. */
+/*
+ * Function: info_proc_mappings
+ *
+ * Implement the "info proc mappings" subcommand.
+ */
static void
-procfs_create_inferior (exec_file, allargs, env)
- char *exec_file;
- char *allargs;
- char **env;
+info_proc_mappings (procinfo *pi, int summary)
{
- char *shell_file = getenv ("SHELL");
- char *tryname;
- if (shell_file != NULL && strchr (shell_file, '/') == NULL)
- {
-
- /* We will be looking down the PATH to find shell_file. If we
- just do this the normal way (via execlp, which operates by
- attempting an exec for each element of the PATH until it
- finds one which succeeds), then there will be an exec for
- each failed attempt, each of which will cause a PR_SYSEXIT
- stop, and we won't know how to distinguish the PR_SYSEXIT's
- for these failed execs with the ones for successful execs
- (whether the exec has succeeded is stored at that time in the
- carry bit or some such architecture-specific and
- non-ABI-specified place).
-
- So I can't think of anything better than to search the PATH
- now. This has several disadvantages: (1) There is a race
- condition; if we find a file now and it is deleted before we
- exec it, we lose, even if the deletion leaves a valid file
- further down in the PATH, (2) there is no way to know exactly
- what an executable (in the sense of "capable of being
- exec'd") file is. Using access() loses because it may lose
- if the caller is the superuser; failing to use it loses if
- there are ACLs or some such. */
-
- char *p;
- char *p1;
- /* FIXME-maybe: might want "set path" command so user can change what
- path is used from within GDB. */
- char *path = getenv ("PATH");
- int len;
- struct stat statbuf;
-
- if (path == NULL)
- path = "/bin:/usr/bin";
-
- tryname = alloca (strlen (path) + strlen (shell_file) + 2);
- for (p = path; p != NULL; p = p1 ? p1 + 1 : NULL)
- {
- p1 = strchr (p, ':');
- if (p1 != NULL)
- len = p1 - p;
- else
- len = strlen (p);
- strncpy (tryname, p, len);
- tryname[len] = '\0';
- strcat (tryname, "/");
- strcat (tryname, shell_file);
- if (access (tryname, X_OK) < 0)
- continue;
- if (stat (tryname, &statbuf) < 0)
- continue;
- if (!S_ISREG (statbuf.st_mode))
- /* We certainly need to reject directories. I'm not quite
- as sure about FIFOs, sockets, etc., but I kind of doubt
- that people want to exec() these things. */
- continue;
- break;
- }
- if (p == NULL)
- /* Not found. This must be an error rather than merely passing
- the file to execlp(), because execlp() would try all the
- exec()s, causing GDB to get confused. */
- error ("Can't find shell %s in PATH", shell_file);
+ char *header_fmt_string;
- shell_file = tryname;
- }
+ if (gdbarch_ptr_bit (current_gdbarch) == 32)
+ header_fmt_string = "\t%10s %10s %10s %10s %7s\n";
+ else
+ header_fmt_string = " %18s %18s %10s %10s %7s\n";
- fork_inferior (exec_file, allargs, env,
- proc_set_exec_trap, procfs_init_inferior, NULL, shell_file);
+ if (summary)
+ return; /* No output for summary mode. */
- /* We are at the first instruction we care about. */
- /* Pedal to the metal... */
+ printf_filtered (_("Mapped address spaces:\n\n"));
+ printf_filtered (header_fmt_string,
+ "Start Addr",
+ " End Addr",
+ " Size",
+ " Offset",
+ "Flags");
- proceed ((CORE_ADDR) - 1, TARGET_SIGNAL_0, 0);
+ iterate_over_mappings (pi, NULL, NULL, info_mappings_callback);
+ printf_filtered ("\n");
}
-/* Clean up after the inferior dies. */
+/*
+ * Function: info_proc_cmd
+ *
+ * Implement the "info proc" command.
+ */
static void
-procfs_mourn_inferior ()
+info_proc_cmd (char *args, int from_tty)
{
- struct procinfo *pi;
- struct procinfo *next_pi;
+ struct cleanup *old_chain;
+ procinfo *process = NULL;
+ procinfo *thread = NULL;
+ char **argv = NULL;
+ char *tmp = NULL;
+ int pid = 0;
+ int tid = 0;
+ int mappings = 0;
+
+ old_chain = make_cleanup (null_cleanup, 0);
+ if (args)
+ {
+ if ((argv = buildargv (args)) == NULL)
+ nomem (0);
+ else
+ make_cleanup_freeargv (argv);
+ }
+ while (argv != NULL && *argv != NULL)
+ {
+ if (isdigit (argv[0][0]))
+ {
+ pid = strtoul (argv[0], &tmp, 10);
+ if (*tmp == '/')
+ tid = strtoul (++tmp, NULL, 10);
+ }
+ else if (argv[0][0] == '/')
+ {
+ tid = strtoul (argv[0] + 1, NULL, 10);
+ }
+ else if (strncmp (argv[0], "mappings", strlen (argv[0])) == 0)
+ {
+ mappings = 1;
+ }
+ else
+ {
+ /* [...] */
+ }
+ argv++;
+ }
+ if (pid == 0)
+ pid = PIDGET (inferior_ptid);
+ if (pid == 0)
+ error (_("No current process: you must name one."));
+ else
+ {
+ /* Have pid, will travel.
+ First see if it's a process we're already debugging. */
+ process = find_procinfo (pid, 0);
+ if (process == NULL)
+ {
+ /* No. So open a procinfo for it, but
+ remember to close it again when finished. */
+ process = create_procinfo (pid, 0);
+ make_cleanup (do_destroy_procinfo_cleanup, process);
+ if (!open_procinfo_files (process, FD_CTL))
+ proc_error (process, "info proc, open_procinfo_files", __LINE__);
+ }
+ }
+ if (tid != 0)
+ thread = create_procinfo (pid, tid);
- for (pi = procinfo_list; pi; pi = next_pi)
+ if (process)
+ {
+ printf_filtered (_("process %d flags:\n"), process->pid);
+ proc_prettyprint_flags (proc_flags (process), 1);
+ if (proc_flags (process) & (PR_STOPPED | PR_ISTOP))
+ proc_prettyprint_why (proc_why (process), proc_what (process), 1);
+ if (proc_get_nthreads (process) > 1)
+ printf_filtered ("Process has %d threads.\n",
+ proc_get_nthreads (process));
+ }
+ if (thread)
{
- next_pi = pi->next;
- unconditionally_kill_inferior (pi);
+ printf_filtered (_("thread %d flags:\n"), thread->tid);
+ proc_prettyprint_flags (proc_flags (thread), 1);
+ if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP))
+ proc_prettyprint_why (proc_why (thread), proc_what (thread), 1);
}
- unpush_target (&procfs_ops);
- generic_mourn_inferior ();
+ if (mappings)
+ {
+ info_proc_mappings (process, 0);
+ }
+
+ do_cleanups (old_chain);
}
+/* Modify the status of the system call identified by SYSCALLNUM in
+ the set of syscalls that are currently traced/debugged.
-/* Mark our target-struct as eligible for stray "run" and "attach" commands. */
-static int
-procfs_can_run ()
+ If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set
+ will be updated. Otherwise, the exit syscalls set will be updated.
+
+ If MODE is FLAG_SET, then traces will be enabled. Otherwise, they
+ will be disabled. */
+
+static void
+proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit,
+ int mode, int from_tty)
{
- /* This variable is controlled by modules that sit atop procfs that may layer
- their own process structure atop that provided here. sol-thread.c does
- this because of the Solaris two-level thread model. */
+ sysset_t *sysset;
+
+ if (entry_or_exit == PR_SYSENTRY)
+ sysset = proc_get_traced_sysentry (pi, NULL);
+ else
+ sysset = proc_get_traced_sysexit (pi, NULL);
- return !procfs_suppress_run;
-}
-#ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
-#ifndef UNIXWARE
-\f
-/* Insert a watchpoint */
-int
-procfs_set_watchpoint (pid, addr, len, rw)
- int pid;
- CORE_ADDR addr;
- int len;
- int rw;
-{
- struct procinfo *pi;
- prwatch_t wpt;
-
- pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
- wpt.pr_vaddr = (caddr_t) addr;
- wpt.pr_size = len;
- wpt.pr_wflags = ((rw & 1) ? MA_READ : 0) | ((rw & 2) ? MA_WRITE : 0);
- if (ioctl (pi->ctl_fd, PIOCSWATCH, &wpt) < 0)
+ if (sysset == NULL)
+ proc_error (pi, "proc-trace, get_traced_sysset", __LINE__);
+
+ if (mode == FLAG_SET)
+ gdb_praddsysset (sysset, syscallnum);
+ else
+ gdb_prdelsysset (sysset, syscallnum);
+
+ if (entry_or_exit == PR_SYSENTRY)
{
- if (errno == E2BIG)
- return -1;
- /* Currently it sometimes happens that the same watchpoint gets
- deleted twice - don't die in this case (FIXME please) */
- if (errno == ESRCH && len == 0)
- return 0;
- print_sys_errmsg (pi->pathname, errno);
- error ("PIOCSWATCH failed");
+ if (!proc_set_traced_sysentry (pi, sysset))
+ proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__);
+ }
+ else
+ {
+ if (!proc_set_traced_sysexit (pi, sysset))
+ proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__);
}
- return 0;
}
-int
-procfs_stopped_by_watchpoint (pid)
- int pid;
+static void
+proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode)
{
- struct procinfo *pi;
- short what;
- short why;
+ procinfo *pi;
+
+ if (PIDGET (inferior_ptid) <= 0)
+ error (_("you must be debugging a process to use this command."));
+
+ if (args == NULL || args[0] == 0)
+ error_no_arg (_("system call to trace"));
- pi = find_procinfo (pid == -1 ? inferior_pid : pid, 0);
- if (pi->prstatus.pr_flags & (PR_STOPPED | PR_ISTOP))
+ pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
+ if (isdigit (args[0]))
{
- why = pi->prstatus.pr_why;
- what = pi->prstatus.pr_what;
- if (why == PR_FAULTED
-#if defined (FLTWATCH) && defined (FLTKWATCH)
- && (what == FLTWATCH || what == FLTKWATCH)
-#else
-#ifdef FLTWATCH
- && (what == FLTWATCH)
-#endif
-#ifdef FLTKWATCH
- && (what == FLTKWATCH)
-#endif
-#endif
- )
- return what;
+ const int syscallnum = atoi (args);
+
+ proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty);
}
- return 0;
}
-#endif /* !UNIXWARE */
-#endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
-/* Why is this necessary? Shouldn't dead threads just be removed from the
- thread database? */
-
-static int
-procfs_thread_alive (pid)
- int pid;
+static void
+proc_trace_sysentry_cmd (char *args, int from_tty)
{
- struct procinfo *pi, *next_pi;
-
- for (pi = procinfo_list; pi; pi = next_pi)
- {
- next_pi = pi->next;
- if (pi->pid == pid)
- if (procfs_read_status (pi)) /* alive */
- return 1;
- else
- /* defunct (exited) */
- {
- close_proc_file (pi);
- return 0;
- }
- }
- return 0;
+ proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET);
}
-int
-procfs_first_available ()
+static void
+proc_trace_sysexit_cmd (char *args, int from_tty)
{
- struct procinfo *pi;
+ proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET);
+}
- for (pi = procinfo_list; pi; pi = pi->next)
- {
- if (procfs_read_status (pi))
- return pi->pid;
- }
- return -1;
+static void
+proc_untrace_sysentry_cmd (char *args, int from_tty)
+{
+ proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET);
}
-int
-procfs_get_pid_fd (pid)
- int pid;
+static void
+proc_untrace_sysexit_cmd (char *args, int from_tty)
{
- struct procinfo *pi = find_procinfo (pid, 1);
+ proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET);
+}
- if (pi == NULL)
- return -1;
- return pi->ctl_fd;
+void
+_initialize_procfs (void)
+{
+ init_procfs_ops ();
+ add_target (&procfs_ops);
+ add_info ("proc", info_proc_cmd, _("\
+Show /proc process information about any running process.\n\
+Specify process id, or use the program being debugged by default.\n\
+Specify keyword 'mappings' for detailed info on memory mappings."));
+ add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd,
+ _("Give a trace of entries into the syscall."));
+ add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd,
+ _("Give a trace of exits from the syscall."));
+ add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd,
+ _("Cancel a trace of entries into the syscall."));
+ add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd,
+ _("Cancel a trace of exits from the syscall."));
}
-/* Send a SIGINT to the process group. This acts just like the user typed a
- ^C on the controlling terminal.
+/* =================== END, GDB "MODULE" =================== */
- XXX - This may not be correct for all systems. Some may want to use
- killpg() instead of kill (-pgrp). */
-static void
-procfs_stop ()
-{
- extern pid_t inferior_process_group;
- kill (-inferior_process_group, SIGINT);
-}
-\f
-/* Convert a pid to printable form. */
+/* miscellaneous stubs: */
+/* The following satisfy a few random symbols mostly created by */
+/* the solaris threads implementation, which I will chase down */
+/* later. */
-#ifdef TIDGET
-char *
-procfs_pid_to_str (pid)
- int pid;
+/*
+ * Return a pid for which we guarantee
+ * we will be able to find a 'live' procinfo.
+ */
+
+ptid_t
+procfs_first_available (void)
{
- static char buf[100];
+ return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1);
+}
- sprintf (buf, "Kernel thread %d", TIDGET (pid));
+/* =================== GCORE .NOTE "MODULE" =================== */
+#if defined (UNIXWARE) || defined (PIOCOPENLWP) || defined (PCAGENT)
+/* gcore only implemented on solaris and unixware (so far) */
- return buf;
+static char *
+procfs_do_thread_registers (bfd *obfd, ptid_t ptid,
+ char *note_data, int *note_size)
+{
+ struct regcache *regcache = get_thread_regcache (ptid);
+ gdb_gregset_t gregs;
+ gdb_fpregset_t fpregs;
+ unsigned long merged_pid;
+
+ merged_pid = TIDGET (ptid) << 16 | PIDGET (ptid);
+
+ fill_gregset (regcache, &gregs, -1);
+#if defined (UNIXWARE)
+ note_data = (char *) elfcore_write_lwpstatus (obfd,
+ note_data,
+ note_size,
+ merged_pid,
+ stop_signal,
+ &gregs);
+#else
+ note_data = (char *) elfcore_write_prstatus (obfd,
+ note_data,
+ note_size,
+ merged_pid,
+ stop_signal,
+ &gregs);
+#endif
+ fill_fpregset (regcache, &fpregs, -1);
+ note_data = (char *) elfcore_write_prfpreg (obfd,
+ note_data,
+ note_size,
+ &fpregs,
+ sizeof (fpregs));
+ return note_data;
}
-#endif /* TIDGET */
-\f
-static void
-init_procfs_ops ()
-{
- procfs_ops.to_shortname = "procfs";
- procfs_ops.to_longname = "Unix /proc child process";
- procfs_ops.to_doc = "Unix /proc child process (started by the \"run\" command).";
- procfs_ops.to_open = procfs_open;
- procfs_ops.to_attach = procfs_attach;
- procfs_ops.to_detach = procfs_detach;
- procfs_ops.to_resume = procfs_resume;
- procfs_ops.to_wait = procfs_wait;
- procfs_ops.to_fetch_registers = procfs_fetch_registers;
- procfs_ops.to_store_registers = procfs_store_registers;
- procfs_ops.to_prepare_to_store = procfs_prepare_to_store;
- procfs_ops.to_xfer_memory = procfs_xfer_memory;
- procfs_ops.to_files_info = procfs_files_info;
- procfs_ops.to_insert_breakpoint = memory_insert_breakpoint;
- procfs_ops.to_remove_breakpoint = memory_remove_breakpoint;
- procfs_ops.to_terminal_init = terminal_init_inferior;
- procfs_ops.to_terminal_inferior = terminal_inferior;
- procfs_ops.to_terminal_ours_for_output = terminal_ours_for_output;
- procfs_ops.to_terminal_ours = terminal_ours;
- procfs_ops.to_terminal_info = child_terminal_info;
- procfs_ops.to_kill = procfs_kill_inferior;
- procfs_ops.to_create_inferior = procfs_create_inferior;
- procfs_ops.to_mourn_inferior = procfs_mourn_inferior;
- procfs_ops.to_can_run = procfs_can_run;
- procfs_ops.to_notice_signals = procfs_notice_signals;
- procfs_ops.to_thread_alive = procfs_thread_alive;
- procfs_ops.to_stop = procfs_stop;
- procfs_ops.to_stratum = process_stratum;
- procfs_ops.to_has_all_memory = 1;
- procfs_ops.to_has_memory = 1;
- procfs_ops.to_has_stack = 1;
- procfs_ops.to_has_registers = 1;
- procfs_ops.to_has_execution = 1;
- procfs_ops.to_magic = OPS_MAGIC;
+struct procfs_corefile_thread_data {
+ bfd *obfd;
+ char *note_data;
+ int *note_size;
+};
+
+static int
+procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data)
+{
+ struct procfs_corefile_thread_data *args = data;
+
+ if (pi != NULL && thread->tid != 0)
+ {
+ ptid_t saved_ptid = inferior_ptid;
+ inferior_ptid = MERGEPID (pi->pid, thread->tid);
+ args->note_data = procfs_do_thread_registers (args->obfd, inferior_ptid,
+ args->note_data,
+ args->note_size);
+ inferior_ptid = saved_ptid;
+ }
+ return 0;
}
-void
-_initialize_procfs ()
+static char *
+procfs_make_note_section (bfd *obfd, int *note_size)
{
-#ifdef HAVE_OPTIONAL_PROC_FS
- char procname[MAX_PROC_NAME_SIZE];
- int fd;
+ struct cleanup *old_chain;
+ gdb_gregset_t gregs;
+ gdb_fpregset_t fpregs;
+ char fname[16] = {'\0'};
+ char psargs[80] = {'\0'};
+ procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
+ char *note_data = NULL;
+ char *inf_args;
+ struct procfs_corefile_thread_data thread_args;
+ char *auxv;
+ int auxv_len;
+
+ if (get_exec_file (0))
+ {
+ strncpy (fname, strrchr (get_exec_file (0), '/') + 1, sizeof (fname));
+ strncpy (psargs, get_exec_file (0),
+ sizeof (psargs));
- /* If we have an optional /proc filesystem (e.g. under OSF/1),
- don't add procfs support if we cannot access the running
- GDB via /proc. */
- sprintf (procname, STATUS_PROC_NAME_FMT, getpid ());
- if ((fd = open (procname, O_RDONLY)) < 0)
- return;
- close (fd);
+ inf_args = get_inferior_args ();
+ if (inf_args && *inf_args &&
+ strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs)))
+ {
+ strncat (psargs, " ",
+ sizeof (psargs) - strlen (psargs));
+ strncat (psargs, inf_args,
+ sizeof (psargs) - strlen (psargs));
+ }
+ }
+
+ note_data = (char *) elfcore_write_prpsinfo (obfd,
+ note_data,
+ note_size,
+ fname,
+ psargs);
+
+#ifdef UNIXWARE
+ fill_gregset (get_current_regcache (), &gregs, -1);
+ note_data = elfcore_write_pstatus (obfd, note_data, note_size,
+ PIDGET (inferior_ptid),
+ stop_signal, &gregs);
#endif
- init_procfs_ops ();
- add_target (&procfs_ops);
+ thread_args.obfd = obfd;
+ thread_args.note_data = note_data;
+ thread_args.note_size = note_size;
+ proc_iterate_over_threads (pi, procfs_corefile_thread_callback, &thread_args);
+
+ if (thread_args.note_data == note_data)
+ {
+ /* iterate_over_threads didn't come up with any threads;
+ just use inferior_ptid. */
+ note_data = procfs_do_thread_registers (obfd, inferior_ptid,
+ note_data, note_size);
+ }
+ else
+ {
+ note_data = thread_args.note_data;
+ }
- add_info ("processes", info_proc,
- "Show process status information using /proc entry.\n\
-Specify process id or use current inferior by default.\n\
-Specify keywords for detailed information; default is summary.\n\
-Keywords are: `all', `faults', `flags', `id', `mappings', `signals',\n\
-`status', `syscalls', and `times'.\n\
-Unambiguous abbreviations may be used.");
+ auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV,
+ NULL, &auxv);
+ if (auxv_len > 0)
+ {
+ note_data = elfcore_write_note (obfd, note_data, note_size,
+ "CORE", NT_AUXV, auxv, auxv_len);
+ xfree (auxv);
+ }
- init_syscall_table ();
+ make_cleanup (xfree, note_data);
+ return note_data;
+}
+#else /* !(Solaris or Unixware) */
+static char *
+procfs_make_note_section (bfd *obfd, int *note_size)
+{
+ error (_("gcore not implemented for this host."));
+ return NULL; /* lint */
}
+#endif /* Solaris or Unixware */
+/* =================== END GCORE .NOTE "MODULE" =================== */
projects / thirdparty / binutils-gdb.git / blobdiff