/* Native support for the SGI Iris running IRIX version 5, for GDB.
- Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995
- Free Software Foundation, Inc.
+
+ Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998,
+ 1999, 2000, 2001, 2002, 2004, 2006, 2007 Free Software Foundation, Inc.
+
Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU
and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin.
Implemented for Irix 4.x by Garrett A. Wollman.
Modified for Irix 5.x by Ian Lance Taylor.
-This file is part of GDB.
+ 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
-(at your option) any later version.
+ 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
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ 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. */
+ 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., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#include "defs.h"
#include "inferior.h"
#include "gdbcore.h"
#include "target.h"
+#include "regcache.h"
#include "gdb_string.h"
#include <sys/time.h>
#include <sys/procfs.h>
#include <setjmp.h> /* For JB_XXX. */
+/* Prototypes for supply_gregset etc. */
+#include "gregset.h"
+#include "mips-tdep.h"
+
+static void fetch_core_registers (char *, unsigned int, int, CORE_ADDR);
+
/* Size of elements in jmpbuf */
#define JB_ELEMENT_SIZE 4
* any MIPS SVR4 target.
*/
-void
-supply_gregset (gregsetp)
- gregset_t *gregsetp;
+void
+supply_gregset (gregset_t *gregsetp)
{
- register int regi;
- register greg_t *regp = &(*gregsetp)[0];
- static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0};
-
- for(regi = 0; regi <= CTX_RA; regi++)
- supply_register (regi, (char *)(regp + regi));
+ int regi;
+ greg_t *regp = &(*gregsetp)[0];
+ int gregoff = sizeof (greg_t) - mips_isa_regsize (current_gdbarch);
+ static char zerobuf[32] = {0};
- supply_register (PC_REGNUM, (char *)(regp + CTX_EPC));
- supply_register (HI_REGNUM, (char *)(regp + CTX_MDHI));
- supply_register (LO_REGNUM, (char *)(regp + CTX_MDLO));
- supply_register (CAUSE_REGNUM, (char *)(regp + CTX_CAUSE));
+ for (regi = 0; regi <= CTX_RA; regi++)
+ regcache_raw_supply (current_regcache, regi,
+ (char *) (regp + regi) + gregoff);
+
+ regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->pc,
+ (char *) (regp + CTX_EPC) + gregoff);
+ regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->hi,
+ (char *) (regp + CTX_MDHI) + gregoff);
+ regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->lo,
+ (char *) (regp + CTX_MDLO) + gregoff);
+ regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->cause,
+ (char *) (regp + CTX_CAUSE) + gregoff);
/* Fill inaccessible registers with zero. */
- supply_register (BADVADDR_REGNUM, zerobuf);
+ regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->badvaddr, zerobuf);
}
void
-fill_gregset (gregsetp, regno)
- gregset_t *gregsetp;
- int regno;
+fill_gregset (gregset_t *gregsetp, int regno)
{
int regi;
- register greg_t *regp = &(*gregsetp)[0];
+ greg_t *regp = &(*gregsetp)[0];
+ LONGEST regval;
+
+ /* Under Irix6, if GDB is built with N32 ABI and is debugging an O32
+ executable, we have to sign extend the registers to 64 bits before
+ filling in the gregset structure. */
for (regi = 0; regi <= CTX_RA; regi++)
if ((regno == -1) || (regno == regi))
- *(regp + regi) = *(greg_t *) ®isters[REGISTER_BYTE (regi)];
+ {
+ regcache_raw_read_signed (current_regcache, regi, ®val);
+ *(regp + regi) = regval;
+ }
if ((regno == -1) || (regno == PC_REGNUM))
- *(regp + CTX_EPC) = *(greg_t *) ®isters[REGISTER_BYTE (PC_REGNUM)];
+ {
+ regcache_raw_read_signed
+ (current_regcache, mips_regnum (current_gdbarch)->pc, ®val);
+ *(regp + CTX_EPC) = regval;
+ }
- if ((regno == -1) || (regno == CAUSE_REGNUM))
- *(regp + CTX_CAUSE) = *(greg_t *) ®isters[REGISTER_BYTE (CAUSE_REGNUM)];
+ if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->cause))
+ {
+ regcache_raw_read_signed
+ (current_regcache, mips_regnum (current_gdbarch)->cause, ®val);
+ *(regp + CTX_CAUSE) = regval;
+ }
- if ((regno == -1) || (regno == HI_REGNUM))
- *(regp + CTX_MDHI) = *(greg_t *) ®isters[REGISTER_BYTE (HI_REGNUM)];
+ if ((regno == -1)
+ || (regno == mips_regnum (current_gdbarch)->hi))
+ {
+ regcache_raw_read_signed
+ (current_regcache, mips_regnum (current_gdbarch)->hi, ®val);
+ *(regp + CTX_MDHI) = regval;
+ }
- if ((regno == -1) || (regno == LO_REGNUM))
- *(regp + CTX_MDLO) = *(greg_t *) ®isters[REGISTER_BYTE (LO_REGNUM)];
+ if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->lo))
+ {
+ regcache_raw_read_signed
+ (current_regcache, mips_regnum (current_gdbarch)->lo, ®val);
+ *(regp + CTX_MDLO) = regval;
+ }
}
/*
*/
void
-supply_fpregset (fpregsetp)
- fpregset_t *fpregsetp;
+supply_fpregset (fpregset_t *fpregsetp)
{
- register int regi;
- static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0};
-
- for (regi = 0; regi < 32; regi++)
- supply_register (FP0_REGNUM + regi,
- (char *)&fpregsetp->fp_r.fp_regs[regi]);
+ int regi;
+ static char zerobuf[32] = {0};
+ char fsrbuf[8];
- supply_register (FCRCS_REGNUM, (char *)&fpregsetp->fp_csr);
+ /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
- /* FIXME: how can we supply FCRIR_REGNUM? SGI doesn't tell us. */
- supply_register (FCRIR_REGNUM, zerobuf);
+ for (regi = 0; regi < 32; regi++)
+ regcache_raw_supply (current_regcache, FP0_REGNUM + regi,
+ (char *) &fpregsetp->fp_r.fp_regs[regi]);
+
+ /* We can't supply the FSR register directly to the regcache,
+ because there is a size issue: On one hand, fpregsetp->fp_csr
+ is 32bits long, while the regcache expects a 64bits long value.
+ So we use a buffer of the correct size and copy into it the register
+ value at the proper location. */
+ memset (fsrbuf, 0, 4);
+ memcpy (fsrbuf + 4, &fpregsetp->fp_csr, 4);
+
+ regcache_raw_supply (current_regcache,
+ mips_regnum (current_gdbarch)->fp_control_status,
+ fsrbuf);
+
+ /* FIXME: how can we supply FCRIR? SGI doesn't tell us. */
+ regcache_raw_supply (current_regcache,
+ mips_regnum (current_gdbarch)->fp_implementation_revision,
+ zerobuf);
}
void
-fill_fpregset (fpregsetp, regno)
- fpregset_t *fpregsetp;
- int regno;
+fill_fpregset (fpregset_t *fpregsetp, int regno)
{
int regi;
char *from, *to;
+ /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
+
for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++)
{
if ((regno == -1) || (regno == regi))
{
- from = (char *) ®isters[REGISTER_BYTE (regi)];
to = (char *) &(fpregsetp->fp_r.fp_regs[regi - FP0_REGNUM]);
- memcpy(to, from, REGISTER_RAW_SIZE (regi));
+ regcache_raw_read (current_regcache, regi, to);
}
}
- if ((regno == -1) || (regno == FCRCS_REGNUM))
- fpregsetp->fp_csr = *(unsigned *) ®isters[REGISTER_BYTE(FCRCS_REGNUM)];
+ if (regno == -1
+ || regno == mips_regnum (current_gdbarch)->fp_control_status)
+ {
+ char fsrbuf[8];
+
+ /* We can't fill the FSR register directly from the regcache,
+ because there is a size issue: On one hand, fpregsetp->fp_csr
+ is 32bits long, while the regcache expects a 64bits long buffer.
+ So we use a buffer of the correct size and copy the register
+ value from that buffer. */
+ regcache_raw_read (current_regcache,
+ mips_regnum (current_gdbarch)->fp_control_status,
+ fsrbuf);
+
+ memcpy (&fpregsetp->fp_csr, fsrbuf + 4, 4);
+ }
}
This routine returns true on success. */
int
-get_longjmp_target (pc)
- CORE_ADDR *pc;
+get_longjmp_target (CORE_ADDR *pc)
{
- char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT];
+ char *buf;
CORE_ADDR jb_addr;
- jb_addr = read_register (A0_REGNUM);
+ buf = alloca (TARGET_PTR_BIT / TARGET_CHAR_BIT);
+ jb_addr = read_register (MIPS_A0_REGNUM);
if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf,
TARGET_PTR_BIT / TARGET_CHAR_BIT))
return 0;
- *pc = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
+ *pc = extract_unsigned_integer (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
return 1;
}
-static void
-fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
- char *core_reg_sect;
- unsigned core_reg_size;
- int which; /* Unused */
- unsigned int reg_addr; /* Unused */
-{
- if (core_reg_size != REGISTER_BYTES)
- {
- warning ("wrong size gregset struct in core file");
- return;
- }
-
- memcpy ((char *)registers, core_reg_sect, core_reg_size);
-}
-\f
-/* Irix 5 uses what appears to be a unique form of shared library
- support. This is a copy of solib.c modified for Irix 5. */
-
-#include <sys/types.h>
-#include <signal.h>
-#include <sys/param.h>
-#include <fcntl.h>
-
-/* <obj.h> includes <sym.h> and <symconst.h>, which causes conflicts
- with our versions of those files included by tm-mips.h. Prevent
- <obj.h> from including them with some appropriate defines. */
-#define __SYM_H__
-#define __SYMCONST_H__
-#include <obj.h>
-
-#include "symtab.h"
-#include "bfd.h"
-#include "symfile.h"
-#include "objfiles.h"
-#include "command.h"
-#include "frame.h"
-#include "gnu-regex.h"
-#include "inferior.h"
-#include "language.h"
-#include "gdbcmd.h"
-
-/* The symbol which starts off the list of shared libraries. */
-#define DEBUG_BASE "__rld_obj_head"
-
-/* How to get the loaded address of a shared library. */
-#define LM_ADDR(so) ((so)->lm.o_praw)
-
-char shadow_contents[BREAKPOINT_MAX]; /* Stash old bkpt addr contents */
-
-struct so_list {
- struct so_list *next; /* next structure in linked list */
- struct obj_list ll;
- struct obj lm; /* copy of link map from inferior */
- struct obj_list *lladdr; /* addr in inferior lm was read from */
- CORE_ADDR lmend; /* upper addr bound of mapped object */
- char symbols_loaded; /* flag: symbols read in yet? */
- char from_tty; /* flag: print msgs? */
- struct objfile *objfile; /* objfile for loaded lib */
- struct section_table *sections;
- struct section_table *sections_end;
- struct section_table *textsection;
- bfd *abfd;
-};
-
-static struct so_list *so_list_head; /* List of known shared objects */
-static CORE_ADDR debug_base; /* Base of dynamic linker structures */
-static CORE_ADDR breakpoint_addr; /* Address where end bkpt is set */
-
-/* Local function prototypes */
-
-static void
-sharedlibrary_command PARAMS ((char *, int));
-
-static int
-enable_break PARAMS ((void));
-
-static int
-disable_break PARAMS ((void));
-
-static void
-info_sharedlibrary_command PARAMS ((char *, int));
-
-static int
-symbol_add_stub PARAMS ((char *));
-
-static struct so_list *
-find_solib PARAMS ((struct so_list *));
-
-static struct obj_list *
-first_link_map_member PARAMS ((void));
-
-static CORE_ADDR
-locate_base PARAMS ((void));
-
-static void
-solib_map_sections PARAMS ((struct so_list *));
-
-/*
-
-LOCAL FUNCTION
-
- solib_map_sections -- open bfd and build sections for shared lib
-
-SYNOPSIS
-
- static void solib_map_sections (struct so_list *so)
-
-DESCRIPTION
-
- Given a pointer to one of the shared objects in our list
- of mapped objects, use the recorded name to open a bfd
- descriptor for the object, build a section table, and then
- relocate all the section addresses by the base address at
- which the shared object was mapped.
-
-FIXMES
-
- In most (all?) cases the shared object file name recorded in the
- dynamic linkage tables will be a fully qualified pathname. For
- cases where it isn't, do we really mimic the systems search
- mechanism correctly in the below code (particularly the tilde
- expansion stuff?).
- */
-
-static void
-solib_map_sections (so)
- struct so_list *so;
-{
- char *filename;
- char *scratch_pathname;
- int scratch_chan;
- struct section_table *p;
- struct cleanup *old_chain;
- bfd *abfd;
- CORE_ADDR offset;
-
- filename = tilde_expand (so -> lm.o_path);
- old_chain = make_cleanup (free, filename);
-
- scratch_chan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0,
- &scratch_pathname);
- if (scratch_chan < 0)
- {
- scratch_chan = openp (getenv ("LD_LIBRARY_PATH"), 1, filename,
- O_RDONLY, 0, &scratch_pathname);
- }
- if (scratch_chan < 0)
- {
- perror_with_name (filename);
- }
- /* Leave scratch_pathname allocated. abfd->name will point to it. */
-
- abfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan);
- if (!abfd)
- {
- close (scratch_chan);
- error ("Could not open `%s' as an executable file: %s",
- scratch_pathname, bfd_errmsg (bfd_get_error ()));
- }
- /* Leave bfd open, core_xfer_memory and "info files" need it. */
- so -> abfd = abfd;
- abfd -> cacheable = true;
-
- if (!bfd_check_format (abfd, bfd_object))
- {
- error ("\"%s\": not in executable format: %s.",
- scratch_pathname, bfd_errmsg (bfd_get_error ()));
- }
- if (build_section_table (abfd, &so -> sections, &so -> sections_end))
- {
- error ("Can't find the file sections in `%s': %s",
- bfd_get_filename (exec_bfd), bfd_errmsg (bfd_get_error ()));
- }
-
- /* Irix 5 shared objects are pre-linked to particular addresses
- although the dynamic linker may have to relocate them if the
- address ranges of the libraries used by the main program clash.
- The offset is the difference between the address where the object
- is mapped and the binding address of the shared library. */
- offset = (CORE_ADDR) LM_ADDR (so) - so -> lm.o_base_address;
-
- for (p = so -> sections; p < so -> sections_end; p++)
- {
- /* Relocate the section binding addresses as recorded in the shared
- object's file by the offset to get the address to which the
- object was actually mapped. */
- p -> addr += offset;
- p -> endaddr += offset;
- so -> lmend = (CORE_ADDR) max (p -> endaddr, so -> lmend);
- if (STREQ (p -> the_bfd_section -> name, ".text"))
- {
- so -> textsection = p;
- }
- }
-
- /* Free the file names, close the file now. */
- do_cleanups (old_chain);
-}
-
-/*
-
-LOCAL FUNCTION
-
- locate_base -- locate the base address of dynamic linker structs
-
-SYNOPSIS
-
- CORE_ADDR locate_base (void)
-
-DESCRIPTION
-
- For both the SunOS and SVR4 shared library implementations, if the
- inferior executable has been linked dynamically, there is a single
- address somewhere in the inferior's data space which is the key to
- locating all of the dynamic linker's runtime structures. This
- address is the value of the symbol defined by the macro DEBUG_BASE.
- The job of this function is to find and return that address, or to
- return 0 if there is no such address (the executable is statically
- linked for example).
-
- For SunOS, the job is almost trivial, since the dynamic linker and
- all of it's structures are statically linked to the executable at
- link time. Thus the symbol for the address we are looking for has
- already been added to the minimal symbol table for the executable's
- objfile at the time the symbol file's symbols were read, and all we
- have to do is look it up there. Note that we explicitly do NOT want
- to find the copies in the shared library.
-
- The SVR4 version is much more complicated because the dynamic linker
- and it's structures are located in the shared C library, which gets
- run as the executable's "interpreter" by the kernel. We have to go
- to a lot more work to discover the address of DEBUG_BASE. Because
- of this complexity, we cache the value we find and return that value
- on subsequent invocations. Note there is no copy in the executable
- symbol tables.
-
- Irix 5 is basically like SunOS.
-
- Note that we can assume nothing about the process state at the time
- we need to find this address. We may be stopped on the first instruc-
- tion of the interpreter (C shared library), the first instruction of
- the executable itself, or somewhere else entirely (if we attached
- to the process for example).
-
- */
-
-static CORE_ADDR
-locate_base ()
-{
- struct minimal_symbol *msymbol;
- CORE_ADDR address = 0;
-
- msymbol = lookup_minimal_symbol (DEBUG_BASE, NULL, symfile_objfile);
- if ((msymbol != NULL) && (SYMBOL_VALUE_ADDRESS (msymbol) != 0))
- {
- address = SYMBOL_VALUE_ADDRESS (msymbol);
- }
- return (address);
-}
-
-/*
-
-LOCAL FUNCTION
-
- first_link_map_member -- locate first member in dynamic linker's map
-
-SYNOPSIS
-
- static struct link_map *first_link_map_member (void)
-
-DESCRIPTION
-
- Read in a copy of the first member in the inferior's dynamic
- link map from the inferior's dynamic linker structures, and return
- a pointer to the copy in our address space.
-*/
-
-static struct obj_list *
-first_link_map_member ()
-{
- struct obj_list *lm;
- struct obj_list s;
-
- read_memory (debug_base, (char *) &lm, sizeof (struct obj_list *));
-
- if (lm == NULL)
- return NULL;
-
- /* The first entry in the list is the object file we are debugging,
- so skip it. */
- read_memory ((CORE_ADDR) lm, (char *) &s, sizeof (struct obj_list));
-
- return s.next;
-}
-
-/*
-
-LOCAL FUNCTION
-
- find_solib -- step through list of shared objects
-
-SYNOPSIS
-
- struct so_list *find_solib (struct so_list *so_list_ptr)
-
-DESCRIPTION
-
- This module contains the routine which finds the names of any
- loaded "images" in the current process. The argument in must be
- NULL on the first call, and then the returned value must be passed
- in on subsequent calls. This provides the capability to "step" down
- the list of loaded objects. On the last object, a NULL value is
- returned.
- */
-
-static struct so_list *
-find_solib (so_list_ptr)
- struct so_list *so_list_ptr; /* Last lm or NULL for first one */
-{
- struct so_list *so_list_next = NULL;
- struct obj_list *lm = NULL;
- struct so_list *new;
-
- if (so_list_ptr == NULL)
- {
- /* We are setting up for a new scan through the loaded images. */
- if ((so_list_next = so_list_head) == NULL)
- {
- /* We have not already read in the dynamic linking structures
- from the inferior, lookup the address of the base structure. */
- debug_base = locate_base ();
- if (debug_base != 0)
- {
- /* Read the base structure in and find the address of the first
- link map list member. */
- lm = first_link_map_member ();
- }
- }
- }
- else
- {
- /* We have been called before, and are in the process of walking
- the shared library list. Advance to the next shared object. */
- if ((lm = so_list_ptr->ll.next) == NULL)
- {
- /* We have hit the end of the list, so check to see if any were
- added, but be quiet if we can't read from the target any more. */
- int status = target_read_memory ((CORE_ADDR) so_list_ptr -> lladdr,
- (char *) &(so_list_ptr -> ll),
- sizeof (struct obj_list));
- if (status == 0)
- {
- lm = so_list_ptr->ll.next;
- }
- else
- {
- lm = NULL;
- }
- }
- so_list_next = so_list_ptr -> next;
- }
- if ((so_list_next == NULL) && (lm != NULL))
- {
- int errcode;
- char *buffer;
-
- /* Get next link map structure from inferior image and build a local
- abbreviated load_map structure */
- new = (struct so_list *) xmalloc (sizeof (struct so_list));
- memset ((char *) new, 0, sizeof (struct so_list));
- new -> lladdr = lm;
- /* Add the new node as the next node in the list, or as the root
- node if this is the first one. */
- if (so_list_ptr != NULL)
- {
- so_list_ptr -> next = new;
- }
- else
- {
- so_list_head = new;
- }
- so_list_next = new;
- read_memory ((CORE_ADDR) lm, (char *) &(new -> ll),
- sizeof (struct obj_list));
- read_memory ((CORE_ADDR) new->ll.data, (char *) &(new -> lm),
- sizeof (struct obj));
- target_read_string ((CORE_ADDR)new->lm.o_path, &buffer,
- INT_MAX, &errcode);
- if (errcode != 0)
- memory_error (errcode, (CORE_ADDR)new->lm.o_path);
- new->lm.o_path = buffer;
- solib_map_sections (new);
- }
- return (so_list_next);
-}
-
-/* A small stub to get us past the arg-passing pinhole of catch_errors. */
-
-static int
-symbol_add_stub (arg)
- char *arg;
-{
- register struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */
-
- so -> objfile = symbol_file_add (so -> lm.o_path, so -> from_tty,
- (unsigned int) so -> textsection -> addr,
- 0, 0, 0);
- return (1);
-}
-
-/*
-
-GLOBAL FUNCTION
-
- solib_add -- add a shared library file to the symtab and section list
-
-SYNOPSIS
-
- void solib_add (char *arg_string, int from_tty,
- struct target_ops *target)
-
-DESCRIPTION
-
-*/
-
-void
-solib_add (arg_string, from_tty, target)
- char *arg_string;
- int from_tty;
- struct target_ops *target;
-{
- register struct so_list *so = NULL; /* link map state variable */
-
- /* Last shared library that we read. */
- struct so_list *so_last = NULL;
-
- char *re_err;
- int count;
- int old;
-
- if ((re_err = re_comp (arg_string ? arg_string : ".")) != NULL)
- {
- error ("Invalid regexp: %s", re_err);
- }
-
- /* Add the shared library sections to the section table of the
- specified target, if any. */
- if (target)
- {
- /* Count how many new section_table entries there are. */
- so = NULL;
- count = 0;
- while ((so = find_solib (so)) != NULL)
- {
- if (so -> lm.o_path[0])
- {
- count += so -> sections_end - so -> sections;
- }
- }
-
- if (count)
- {
- int update_coreops;
-
- /* We must update the to_sections field in the core_ops structure
- here, otherwise we dereference a potential dangling pointer
- for each call to target_read/write_memory within this routine. */
- update_coreops = core_ops.to_sections == target->to_sections;
-
- /* Reallocate the target's section table including the new size. */
- if (target -> to_sections)
- {
- old = target -> to_sections_end - target -> to_sections;
- target -> to_sections = (struct section_table *)
- xrealloc ((char *)target -> to_sections,
- (sizeof (struct section_table)) * (count + old));
- }
- else
- {
- old = 0;
- target -> to_sections = (struct section_table *)
- xmalloc ((sizeof (struct section_table)) * count);
- }
- target -> to_sections_end = target -> to_sections + (count + old);
-
- /* Update the to_sections field in the core_ops structure
- if needed. */
- if (update_coreops)
- {
- core_ops.to_sections = target->to_sections;
- core_ops.to_sections_end = target->to_sections_end;
- }
-
- /* Add these section table entries to the target's table. */
- while ((so = find_solib (so)) != NULL)
- {
- if (so -> lm.o_path[0])
- {
- count = so -> sections_end - so -> sections;
- memcpy ((char *) (target -> to_sections + old),
- so -> sections,
- (sizeof (struct section_table)) * count);
- old += count;
- }
- }
- }
- }
-
- /* Now add the symbol files. */
- while ((so = find_solib (so)) != NULL)
- {
- if (so -> lm.o_path[0] && re_exec (so -> lm.o_path))
- {
- so -> from_tty = from_tty;
- if (so -> symbols_loaded)
- {
- if (from_tty)
- {
- printf_unfiltered ("Symbols already loaded for %s\n", so -> lm.o_path);
- }
- }
- else if (catch_errors
- (symbol_add_stub, (char *) so,
- "Error while reading shared library symbols:\n",
- RETURN_MASK_ALL))
- {
- so_last = so;
- so -> symbols_loaded = 1;
- }
- }
- }
-
- /* Getting new symbols may change our opinion about what is
- frameless. */
- if (so_last)
- reinit_frame_cache ();
-}
-
-/*
-
-LOCAL FUNCTION
+/* Provide registers to GDB from a core file.
- info_sharedlibrary_command -- code for "info sharedlibrary"
+ CORE_REG_SECT points to an array of bytes, which were obtained from
+ a core file which BFD thinks might contain register contents.
+ CORE_REG_SIZE is its size.
-SYNOPSIS
+ Normally, WHICH says which register set corelow suspects this is:
+ 0 --- the general-purpose register set
+ 2 --- the floating-point register set
+ However, for Irix 5, WHICH isn't used.
- static void info_sharedlibrary_command ()
-
-DESCRIPTION
-
- Walk through the shared library list and print information
- about each attached library.
-*/
+ REG_ADDR is also unused. */
static void
-info_sharedlibrary_command (ignore, from_tty)
- char *ignore;
- int from_tty;
+fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
+ int which, CORE_ADDR reg_addr)
{
- register struct so_list *so = NULL; /* link map state variable */
- int header_done = 0;
-
- if (exec_bfd == NULL)
- {
- printf_unfiltered ("No exec file.\n");
- return;
- }
- while ((so = find_solib (so)) != NULL)
- {
- if (so -> lm.o_path[0])
- {
- if (!header_done)
- {
- printf_unfiltered("%-12s%-12s%-12s%s\n", "From", "To", "Syms Read",
- "Shared Object Library");
- header_done++;
- }
- printf_unfiltered ("%-12s",
- local_hex_string_custom ((unsigned long) LM_ADDR (so),
- "08l"));
- printf_unfiltered ("%-12s",
- local_hex_string_custom ((unsigned long) so -> lmend,
- "08l"));
- printf_unfiltered ("%-12s", so -> symbols_loaded ? "Yes" : "No");
- printf_unfiltered ("%s\n", so -> lm.o_path);
- }
- }
- if (so_list_head == NULL)
- {
- printf_unfiltered ("No shared libraries loaded at this time.\n");
- }
-}
-
-/*
-
-GLOBAL FUNCTION
-
- solib_address -- check to see if an address is in a shared lib
-
-SYNOPSIS
-
- char *solib_address (CORE_ADDR address)
-
-DESCRIPTION
+ char *srcp = core_reg_sect;
+ int regsize = mips_isa_regsize (current_gdbarch);
+ int regno;
- Provides a hook for other gdb routines to discover whether or
- not a particular address is within the mapped address space of
- a shared library. Any address between the base mapping address
- and the first address beyond the end of the last mapping, is
- considered to be within the shared library address space, for
- our purposes.
-
- For example, this routine is called at one point to disable
- breakpoints which are in shared libraries that are not currently
- mapped in.
- */
-
-char *
-solib_address (address)
- CORE_ADDR address;
-{
- register struct so_list *so = 0; /* link map state variable */
-
- while ((so = find_solib (so)) != NULL)
- {
- if (so -> lm.o_path[0])
- {
- if ((address >= (CORE_ADDR) LM_ADDR (so)) &&
- (address < (CORE_ADDR) so -> lmend))
- return (so->lm.o_path);
- }
- }
- return (0);
-}
-
-/* Called by free_all_symtabs */
-
-void
-clear_solib()
-{
- struct so_list *next;
- char *bfd_filename;
-
- while (so_list_head)
+ /* If regsize is 8, this is a N32 or N64 core file.
+ If regsize is 4, this is an O32 core file. */
+ if (core_reg_size != regsize * NUM_REGS)
{
- if (so_list_head -> sections)
- {
- free ((PTR)so_list_head -> sections);
- }
- if (so_list_head -> abfd)
- {
- bfd_filename = bfd_get_filename (so_list_head -> abfd);
- if (!bfd_close (so_list_head -> abfd))
- warning ("cannot close \"%s\": %s",
- bfd_filename, bfd_errmsg (bfd_get_error ()));
- }
- else
- /* This happens for the executable on SVR4. */
- bfd_filename = NULL;
-
- next = so_list_head -> next;
- if (bfd_filename)
- free ((PTR)bfd_filename);
- free (so_list_head->lm.o_path);
- free ((PTR)so_list_head);
- so_list_head = next;
- }
- debug_base = 0;
-}
-
-/*
-
-LOCAL FUNCTION
-
- disable_break -- remove the "mapping changed" breakpoint
-
-SYNOPSIS
-
- static int disable_break ()
-
-DESCRIPTION
-
- Removes the breakpoint that gets hit when the dynamic linker
- completes a mapping change.
-
-*/
-
-static int
-disable_break ()
-{
- int status = 1;
-
-
- /* Note that breakpoint address and original contents are in our address
- space, so we just need to write the original contents back. */
-
- if (memory_remove_breakpoint (breakpoint_addr, shadow_contents) != 0)
- {
- status = 0;
- }
-
- /* For the SVR4 version, we always know the breakpoint address. For the
- SunOS version we don't know it until the above code is executed.
- Grumble if we are stopped anywhere besides the breakpoint address. */
-
- if (stop_pc != breakpoint_addr)
- {
- warning ("stopped at unknown breakpoint while handling shared libraries");
- }
-
- return (status);
-}
-
-/*
-
-LOCAL FUNCTION
-
- enable_break -- arrange for dynamic linker to hit breakpoint
-
-SYNOPSIS
-
- int enable_break (void)
-
-DESCRIPTION
-
- This functions inserts a breakpoint at the entry point of the
- main executable, where all shared libraries are mapped in.
-*/
-
-static int
-enable_break ()
-{
- if (symfile_objfile != NULL
- && target_insert_breakpoint (symfile_objfile->ei.entry_point,
- shadow_contents) == 0)
- {
- breakpoint_addr = symfile_objfile->ei.entry_point;
- return 1;
- }
-
- return 0;
-}
-
-/*
-
-GLOBAL FUNCTION
-
- solib_create_inferior_hook -- shared library startup support
-
-SYNOPSIS
-
- void solib_create_inferior_hook()
-
-DESCRIPTION
-
- When gdb starts up the inferior, it nurses it along (through the
- shell) until it is ready to execute it's first instruction. At this
- point, this function gets called via expansion of the macro
- SOLIB_CREATE_INFERIOR_HOOK.
-
- For SunOS executables, this first instruction is typically the
- one at "_start", or a similar text label, regardless of whether
- the executable is statically or dynamically linked. The runtime
- startup code takes care of dynamically linking in any shared
- libraries, once gdb allows the inferior to continue.
-
- For SVR4 executables, this first instruction is either the first
- instruction in the dynamic linker (for dynamically linked
- executables) or the instruction at "start" for statically linked
- executables. For dynamically linked executables, the system
- first exec's /lib/libc.so.N, which contains the dynamic linker,
- and starts it running. The dynamic linker maps in any needed
- shared libraries, maps in the actual user executable, and then
- jumps to "start" in the user executable.
-
- For both SunOS shared libraries, and SVR4 shared libraries, we
- can arrange to cooperate with the dynamic linker to discover the
- names of shared libraries that are dynamically linked, and the
- base addresses to which they are linked.
-
- This function is responsible for discovering those names and
- addresses, and saving sufficient information about them to allow
- their symbols to be read at a later time.
-
-FIXME
-
- Between enable_break() and disable_break(), this code does not
- properly handle hitting breakpoints which the user might have
- set in the startup code or in the dynamic linker itself. Proper
- handling will probably have to wait until the implementation is
- changed to use the "breakpoint handler function" method.
-
- Also, what if child has exit()ed? Must exit loop somehow.
- */
-
-void
-solib_create_inferior_hook()
-{
- if (!enable_break ())
- {
- warning ("shared library handler failed to enable breakpoint");
+ warning (_("wrong size gregset struct in core file"));
return;
}
- /* Now run the target. It will eventually hit the breakpoint, at
- which point all of the libraries will have been mapped in and we
- can go groveling around in the dynamic linker structures to find
- out what we need to know about them. */
-
- clear_proceed_status ();
- stop_soon_quietly = 1;
- stop_signal = 0;
- do
- {
- target_resume (-1, 0, stop_signal);
- wait_for_inferior ();
- }
- while (stop_signal != SIGTRAP);
-
- /* We are now either at the "mapping complete" breakpoint (or somewhere
- else, a condition we aren't prepared to deal with anyway), so adjust
- the PC as necessary after a breakpoint, disable the breakpoint, and
- add any shared libraries that were mapped in. */
-
- if (DECR_PC_AFTER_BREAK)
- {
- stop_pc -= DECR_PC_AFTER_BREAK;
- write_register (PC_REGNUM, stop_pc);
- }
-
- if (!disable_break ())
+ for (regno = 0; regno < NUM_REGS; regno++)
{
- warning ("shared library handler failed to disable breakpoint");
+ regcache_raw_write (current_regcache, regno, srcp);
+ srcp += regsize;
}
-
- /* solib_add will call reinit_frame_cache.
- But we are stopped in the startup code and we might not have symbols
- for the startup code, so heuristic_proc_start could be called
- and will put out an annoying warning.
- Delaying the resetting of stop_soon_quietly until after symbol loading
- suppresses the warning. */
- if (auto_solib_add_at_startup)
- solib_add ((char *) 0, 0, (struct target_ops *) 0);
- stop_soon_quietly = 0;
-}
-
-/*
-
-LOCAL FUNCTION
-
- sharedlibrary_command -- handle command to explicitly add library
-
-SYNOPSIS
-
- static void sharedlibrary_command (char *args, int from_tty)
-
-DESCRIPTION
-
-*/
-
-static void
-sharedlibrary_command (args, from_tty)
-char *args;
-int from_tty;
-{
- dont_repeat ();
- solib_add (args, from_tty, (struct target_ops *) 0);
-}
-
-void
-_initialize_solib()
-{
- add_com ("sharedlibrary", class_files, sharedlibrary_command,
- "Load shared object library symbols for files matching REGEXP.");
- add_info ("sharedlibrary", info_sharedlibrary_command,
- "Status of loaded shared object libraries.");
-
- add_show_from_set
- (add_set_cmd ("auto-solib-add", class_support, var_zinteger,
- (char *) &auto_solib_add_at_startup,
- "Set autoloading of shared library symbols at startup.\n\
-If nonzero, symbols from all shared object libraries will be loaded\n\
-automatically when the inferior begins execution. Otherwise, symbols\n\
-must be loaded manually, using `sharedlibrary'.",
- &setlist),
- &showlist);
}
-\f
/* Register that we are able to handle irix5 core file formats.
This really is bfd_target_unknown_flavour */
static struct core_fns irix5_core_fns =
{
- bfd_target_unknown_flavour,
- fetch_core_registers,
- NULL
+ bfd_target_unknown_flavour, /* core_flavour */
+ default_check_format, /* check_format */
+ default_core_sniffer, /* core_sniffer */
+ fetch_core_registers, /* core_read_registers */
+ NULL /* next */
};
void
-_initialize_core_irix5 ()
+_initialize_core_irix5 (void)
{
- add_core_fns (&irix5_core_fns);
+ deprecated_add_core_fns (&irix5_core_fns);
}
projects / thirdparty / binutils-gdb.git / blobdiff