/* Remote target communications for serial-line targets in custom GDB protocol
- Copyright 1988, 1991, 1992, 1993 Free Software Foundation, Inc.
-
-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 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-/* Remote communication protocol.
-
- A debug packet whose contents are <data>
- is encapsulated for transmission in the form:
-
- $ <data> # CSUM1 CSUM2
-
- <data> must be ASCII alphanumeric and cannot include characters
- '$' or '#'
-
- CSUM1 and CSUM2 are ascii hex representation of an 8-bit
- checksum of <data>, the most significant nibble is sent first.
- the hex digits 0-9,a-f are used.
-
- Receiver responds with:
-
- + - if CSUM is correct and ready for next packet
- - - if CSUM is incorrect
-
- <data> is as follows:
- All values are encoded in ascii hex digits.
-
- Request Packet
-
- read registers g
- reply XX....X Each byte of register data
- is described by two hex digits.
- Registers are in the internal order
- for GDB, and the bytes in a register
- are in the same order the machine uses.
- or ENN for an error.
-
- write regs GXX..XX Each byte of register data
- is described by two hex digits.
- reply OK for success
- ENN for an error
-
- read mem mAA..AA,LLLL AA..AA is address, LLLL is length.
- reply XX..XX XX..XX is mem contents
- Can be fewer bytes than requested
- if able to read only part of the data.
- or ENN NN is errno
-
- write mem MAA..AA,LLLL:XX..XX
- AA..AA is address,
- LLLL is number of bytes,
- XX..XX is data
- reply OK for success
- ENN for an error (this includes the case
- where only part of the data was
- written).
-
- cont cAA..AA AA..AA is address to resume
- If AA..AA is omitted,
- resume at same address.
-
- step sAA..AA AA..AA is address to resume
- If AA..AA is omitted,
- resume at same address.
-
- last signal ? Reply the current reason for stopping.
- This is the same reply as is generated
- for step or cont : SAA where AA is the
- signal number.
-
- There is no immediate reply to step or cont.
- The reply comes when the machine stops.
- It is SAA AA is the "signal number"
-
- or... TAAn...:r...;n:r...;n...:r...;
- AA = signal number
- n... = register number
- r... = register contents
-
- kill request k
-
- toggle debug d toggle debug flag (see 386 & 68k stubs)
- reset r reset -- see sparc stub.
- reserved <other> On other requests, the stub should
- ignore the request and send an empty
- response ($#<checksum>). This way
- we can extend the protocol and GDB
- can tell whether the stub it is
- talking to uses the old or the new.
-*/
+ Copyright 1988, 91, 92, 93, 94, 95, 96, 97, 98, 1999
+ Free Software Foundation, Inc.
+
+ 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 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. */
+
+/* See the GDB User Guide for details of the GDB remote protocol. */
#include "defs.h"
-#include <string.h>
+#include "gdb_string.h"
+#include <ctype.h>
#include <fcntl.h>
#include "frame.h"
#include "inferior.h"
#include "symfile.h"
#include "target.h"
#include "wait.h"
-#include "terminal.h"
+/*#include "terminal.h" */
#include "gdbcmd.h"
+#include "objfiles.h"
+#include "gdb-stabs.h"
+#include "gdbthread.h"
#include "dcache.h"
-#if !defined(DONT_USE_REMOTE)
+#include <ctype.h>
+#include <sys/time.h>
#ifdef USG
#include <sys/types.h>
#endif
+#include "event-loop.h"
+
#include <signal.h>
#include "serial.h"
/* Prototypes for local functions */
+static void initialize_sigint_signal_handler PARAMS ((void));
+static void handle_remote_sigint PARAMS ((int));
+static void handle_remote_sigint_twice PARAMS ((int));
+static void async_remote_interrupt PARAMS ((gdb_client_data));
+static void async_remote_interrupt_twice PARAMS ((gdb_client_data));
-static int
-remote_write_bytes PARAMS ((CORE_ADDR memaddr, unsigned char *myaddr, int len));
+static void set_extended_protocol PARAMS ((struct continuation_arg *));
-static int
-remote_read_bytes PARAMS ((CORE_ADDR memaddr, unsigned char *myaddr, int len));
+static void build_remote_gdbarch_data PARAMS ((void));
-static void
-remote_files_info PARAMS ((struct target_ops *ignore));
+static int remote_write_bytes PARAMS ((CORE_ADDR memaddr,
+ char *myaddr, int len));
-static int
-remote_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr, int len,
- int should_write, struct target_ops *target));
+static int remote_read_bytes PARAMS ((CORE_ADDR memaddr,
+ char *myaddr, int len));
-static void
-remote_prepare_to_store PARAMS ((void));
+static void remote_files_info PARAMS ((struct target_ops * ignore));
-static void
-remote_fetch_registers PARAMS ((int regno));
+static int remote_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr,
+ int len, int should_write,
+ struct target_ops * target));
-static void
-remote_resume PARAMS ((int pid, int step, int siggnal));
+static void remote_prepare_to_store PARAMS ((void));
-static int
-remote_start_remote PARAMS ((char *dummy));
+static void remote_fetch_registers PARAMS ((int regno));
-static void
-remote_open PARAMS ((char *name, int from_tty));
+static void remote_resume PARAMS ((int pid, int step,
+ enum target_signal siggnal));
+static void remote_async_resume PARAMS ((int pid, int step,
+ enum target_signal siggnal));
-static void
-remote_close PARAMS ((int quitting));
+static int remote_start_remote PARAMS ((PTR));
-static void
-remote_store_registers PARAMS ((int regno));
+static void remote_open PARAMS ((char *name, int from_tty));
+static void remote_async_open PARAMS ((char *name, int from_tty));
-static void
-getpkt PARAMS ((char *buf, int forever));
+static void extended_remote_open PARAMS ((char *name, int from_tty));
+static void extended_remote_async_open PARAMS ((char *name, int from_tty));
-static void
-putpkt PARAMS ((char *buf));
+static void remote_open_1 PARAMS ((char *, int, struct target_ops *,
+ int extended_p));
+static void remote_async_open_1 PARAMS ((char *, int, struct target_ops *,
+ int extended_p));
-static void
-remote_send PARAMS ((char *buf));
+static void remote_close PARAMS ((int quitting));
-static int
-readchar PARAMS ((void));
+static void remote_store_registers PARAMS ((int regno));
-static int
-remote_wait PARAMS ((WAITTYPE *status));
+static void remote_mourn PARAMS ((void));
+static void remote_async_mourn PARAMS ((void));
-static int
-tohex PARAMS ((int nib));
+static void extended_remote_restart PARAMS ((void));
-static int
-fromhex PARAMS ((int a));
+static void extended_remote_mourn PARAMS ((void));
-static void
-remote_detach PARAMS ((char *args, int from_tty));
+static void extended_remote_create_inferior PARAMS ((char *, char *, char **));
+static void extended_remote_async_create_inferior PARAMS ((char *, char *, char **));
-static void
-remote_interrupt PARAMS ((int signo));
+static void remote_mourn_1 PARAMS ((struct target_ops *));
-static void
-remote_interrupt_twice PARAMS ((int signo));
+static void remote_send PARAMS ((char *buf));
+
+static int readchar PARAMS ((int timeout));
+
+static int remote_wait PARAMS ((int pid, struct target_waitstatus * status));
+static int remote_async_wait PARAMS ((int pid, struct target_waitstatus * status));
+
+static void remote_kill PARAMS ((void));
+static void remote_async_kill PARAMS ((void));
+
+static int tohex PARAMS ((int nib));
+
+static void remote_detach PARAMS ((char *args, int from_tty));
+static void remote_async_detach PARAMS ((char *args, int from_tty));
+
+static void remote_interrupt PARAMS ((int signo));
+
+static void remote_interrupt_twice PARAMS ((int signo));
+
+static void interrupt_query PARAMS ((void));
+
+static void set_thread PARAMS ((int, int));
+
+static int remote_thread_alive PARAMS ((int));
+
+static void get_offsets PARAMS ((void));
+
+static int read_frame PARAMS ((char *));
+
+static int remote_insert_breakpoint PARAMS ((CORE_ADDR, char *));
+
+static int remote_remove_breakpoint PARAMS ((CORE_ADDR, char *));
+
+static int hexnumlen PARAMS ((ULONGEST num));
+
+static void init_remote_ops PARAMS ((void));
+
+static void init_extended_remote_ops PARAMS ((void));
+
+static void init_remote_cisco_ops PARAMS ((void));
+
+static struct target_ops remote_cisco_ops;
+
+static void remote_stop PARAMS ((void));
+
+static int ishex PARAMS ((int ch, int *val));
+
+static int stubhex PARAMS ((int ch));
+
+static int remote_query PARAMS ((int /*char */ , char *, char *, int *));
+
+static int hexnumstr PARAMS ((char *, ULONGEST));
+
+static CORE_ADDR remote_address_masked PARAMS ((CORE_ADDR));
+
+static void print_packet PARAMS ((char *));
+
+static unsigned long crc32 PARAMS ((unsigned char *, int, unsigned int));
+
+static void compare_sections_command PARAMS ((char *, int));
+
+static void packet_command PARAMS ((char *, int));
+
+static int stub_unpack_int PARAMS ((char *buff, int fieldlength));
+
+static int remote_current_thread PARAMS ((int oldpid));
+
+static void remote_find_new_threads PARAMS ((void));
+
+static void record_currthread PARAMS ((int currthread));
+
+/* exported functions */
+
+extern int fromhex PARAMS ((int a));
+
+extern void getpkt PARAMS ((char *buf, int forever));
+
+extern int putpkt PARAMS ((char *buf));
+
+static int putpkt_binary PARAMS ((char *buf, int cnt));
-extern struct target_ops remote_ops; /* Forward decl */
+void remote_console_output PARAMS ((char *));
+
+static void check_binary_download PARAMS ((CORE_ADDR addr));
+
+struct packet_config;
+
+static void show_packet_config_cmd PARAMS ((struct packet_config * config));
+
+static void set_packet_config_cmd PARAMS ((struct packet_config * config,
+ struct cmd_list_element * c));
+
+static void add_packet_config_cmd PARAMS ((struct packet_config * config,
+ char *name,
+ char *title,
+ void (*set_func) (char *args, int from_tty, struct cmd_list_element * c),
+ void (*show_func) (char *name, int from_tty),
+ struct cmd_list_element **setlist,
+ struct cmd_list_element **showlist));
+
+static void init_packet_config PARAMS ((struct packet_config * config));
+
+static void set_remote_protocol_P_packet_cmd PARAMS ((char *args,
+ int from_tty,
+ struct cmd_list_element * c));
+
+static void show_remote_protocol_P_packet_cmd PARAMS ((char *args,
+ int from_tty));
+
+static void set_remote_protocol_Z_packet_cmd PARAMS ((char *args,
+ int from_tty,
+ struct cmd_list_element * c));
+
+static void show_remote_protocol_Z_packet_cmd PARAMS ((char *args,
+ int from_tty));
+
+
+
+
+/* Define the target subroutine names */
+
+void open_remote_target PARAMS ((char *, int, struct target_ops *, int));
+
+void _initialize_remote PARAMS ((void));
+
+/* */
+
+static struct target_ops remote_ops;
+
+static struct target_ops extended_remote_ops;
+
+/* Temporary target ops. Just like the remote_ops and
+ extended_remote_ops, but with asynchronous support. */
+static struct target_ops remote_async_ops;
+
+static struct target_ops extended_async_remote_ops;
/* This was 5 seconds, which is a long time to sit and wait.
Unless this is going though some terminal server or multiplexer or
other form of hairy serial connection, I would think 2 seconds would
be plenty. */
-static int timeout = 2;
-#if 0
-int icache;
-#endif
+/* Changed to allow option to set timeout value.
+ was static int remote_timeout = 2; */
+extern int remote_timeout;
+
+/* This variable chooses whether to send a ^C or a break when the user
+ requests program interruption. Although ^C is usually what remote
+ systems expect, and that is the default here, sometimes a break is
+ preferable instead. */
+
+static int remote_break;
/* Descriptor for I/O to remote machine. Initialize it to NULL so that
remote_open knows that we don't have a file open when the program
starts. */
-serial_t remote_desc = NULL;
+static serial_t remote_desc = NULL;
-#define PBUFSIZ 1024
+/* This is set by the target (thru the 'S' message)
+ to denote that the target is in kernel mode. */
+static int cisco_kernel_mode = 0;
/* Maximum number of bytes to read/write at once. The value here
is chosen to fill up a packet (the headers account for the 32). */
-#define MAXBUFBYTES ((PBUFSIZ-32)/2)
+#define MAXBUFBYTES(N) (((N)-32)/2)
+/* Having this larger than 400 causes us to be incompatible with m68k-stub.c
+ and i386-stub.c. Normally, no one would notice because it only matters
+ for writing large chunks of memory (e.g. in downloads). Also, this needs
+ to be more than 400 if required to hold the registers (see below, where
+ we round it up based on REGISTER_BYTES). */
/* Round up PBUFSIZ to hold all the registers, at least. */
-#if REGISTER_BYTES > MAXBUFBYTES
-#undef PBUFSIZ
-#define PBUFSIZ (REGISTER_BYTES * 2 + 32)
-#endif
-\f
-/* Clean up connection to a remote debugger. */
+#define PBUFSIZ ((REGISTER_BYTES > MAXBUFBYTES (400)) \
+ ? (REGISTER_BYTES * 2 + 32) \
+ : 400)
+
+
+/* This variable sets the number of bytes to be written to the target
+ in a single packet. Normally PBUFSIZ is satisfactory, but some
+ targets need smaller values (perhaps because the receiving end
+ is slow). */
+
+static int remote_write_size;
+
+/* This variable sets the number of bits in an address that are to be
+ sent in a memory ("M" or "m") packet. Normally, after stripping
+ leading zeros, the entire address would be sent. This variable
+ restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
+ initial implementation of remote.c restricted the address sent in
+ memory packets to ``host::sizeof long'' bytes - (typically 32
+ bits). Consequently, for 64 bit targets, the upper 32 bits of an
+ address was never sent. Since fixing this bug may cause a break in
+ some remote targets this variable is principly provided to
+ facilitate backward compatibility. */
+
+static int remote_address_size;
+
+/* This is the size (in chars) of the first response to the `g' command. This
+ is used to limit the size of the memory read and write commands to prevent
+ stub buffers from overflowing. The size does not include headers and
+ trailers, it is only the payload size. */
+
+static int remote_register_buf_size = 0;
+
+/* Generic configuration support for packets the stub optionally
+ supports. Allows the user to specify the use of the packet as well
+ as allowing GDB to auto-detect support in the remote stub. */
+
+enum packet_support
+ {
+ PACKET_SUPPORT_UNKNOWN = 0,
+ PACKET_ENABLE,
+ PACKET_DISABLE
+ };
+
+enum packet_detect
+ {
+ PACKET_AUTO_DETECT = 0,
+ PACKET_MANUAL_DETECT
+ };
+
+struct packet_config
+ {
+ char *state;
+ char *name;
+ char *title;
+ enum packet_detect detect;
+ enum packet_support support;
+ };
+
+static char packet_support_auto[] = "auto";
+static char packet_enable[] = "enable";
+static char packet_disable[] = "disable";
+static char *packet_support_enums[] =
+{
+ packet_support_auto,
+ packet_enable,
+ packet_disable,
+ 0,
+};
-/* ARGSUSED */
static void
-remote_close (quitting)
- int quitting;
+set_packet_config_cmd (config, c)
+ struct packet_config *config;
+ struct cmd_list_element *c;
{
- if (remote_desc)
- SERIAL_CLOSE (remote_desc);
- remote_desc = NULL;
+ if (config->state == packet_enable)
+ {
+ config->detect = PACKET_MANUAL_DETECT;
+ config->support = PACKET_ENABLE;
+ }
+ else if (config->state == packet_disable)
+ {
+ config->detect = PACKET_MANUAL_DETECT;
+ config->support = PACKET_DISABLE;
+ }
+ else if (config->state == packet_support_auto)
+ {
+ config->detect = PACKET_AUTO_DETECT;
+ config->support = PACKET_SUPPORT_UNKNOWN;
+ }
+ else
+ internal_error ("Bad enum value");
}
-/* Stub for catch_errors. */
-
-static int
-remote_start_remote (dummy)
- char *dummy;
+static void
+show_packet_config_cmd (config)
+ struct packet_config *config;
{
- immediate_quit = 1; /* Allow user to interrupt it */
-
- /* Ack any packet which the remote side has already sent. */
- /* I'm not sure this \r is needed; we don't use it any other time we
- send an ack. */
- SERIAL_WRITE (remote_desc, "+\r", 2);
- putpkt ("?"); /* initiate a query from remote machine */
- immediate_quit = 0;
-
- start_remote (); /* Initialize gdb process mechanisms */
- return 1;
+ char *support = "internal-error";
+ switch (config->support)
+ {
+ case PACKET_ENABLE:
+ support = "enabled";
+ break;
+ case PACKET_DISABLE:
+ support = "disabled";
+ break;
+ case PACKET_SUPPORT_UNKNOWN:
+ support = "unknown";
+ break;
+ }
+ switch (config->detect)
+ {
+ case PACKET_AUTO_DETECT:
+ printf_filtered ("Support for remote protocol `%s' (%s) packet is auto-detected, currently %s.\n",
+ config->name, config->title, support);
+ break;
+ case PACKET_MANUAL_DETECT:
+ printf_filtered ("Support for remote protocol `%s' (%s) is currently %s.\n",
+ config->name, config->title, support);
+ }
}
-/* Open a connection to a remote debugger.
- NAME is the filename used for communication. */
-
-static DCACHE *remote_dcache;
-
static void
-remote_open (name, from_tty)
+add_packet_config_cmd (config, name, title, set_func, show_func,
+ setlist, showlist)
+ struct packet_config *config;
char *name;
- int from_tty;
+ char *title;
+ void (*set_func) PARAMS ((char *args, int from_tty,
+ struct cmd_list_element * c));
+ void (*show_func) PARAMS ((char *name, int from_tty));
+ struct cmd_list_element **setlist;
+ struct cmd_list_element **showlist;
{
- if (name == 0)
- error (
-"To open a remote debug connection, you need to specify what serial\n\
-device is attached to the remote system (e.g. /dev/ttya).");
-
- target_preopen (from_tty);
-
- unpush_target (&remote_ops);
-
- remote_dcache = dcache_init (remote_read_bytes, remote_write_bytes);
-
- remote_desc = SERIAL_OPEN (name);
- if (!remote_desc)
- perror_with_name (name);
+ struct cmd_list_element *c;
+ char *set_doc;
+ char *show_doc;
+ char *full_name;
+ config->name = name;
+ config->title = title;
+ asprintf (&set_doc, "Set use of remote protocol `%s' (%s) packet",
+ name, title);
+ asprintf (&show_doc, "Show current use of remote protocol `%s' (%s) packet",
+ name, title);
+ asprintf (&full_name, "%s-packet", name);
+ c = add_set_enum_cmd (full_name,
+ class_obscure, packet_support_enums,
+ (char *) &config->state,
+ set_doc, setlist);
+ c->function.sfunc = set_func;
+ add_cmd (full_name, class_obscure, show_func, show_doc, showlist);
+}
- if (baud_rate)
+static void
+init_packet_config (config)
+ struct packet_config *config;
+{
+ switch (config->detect)
{
- int rate;
-
- if (sscanf (baud_rate, "%d", &rate) == 1)
- if (SERIAL_SETBAUDRATE (remote_desc, rate))
- {
- SERIAL_CLOSE (remote_desc);
- perror_with_name (name);
- }
+ case PACKET_AUTO_DETECT:
+ config->support = PACKET_SUPPORT_UNKNOWN;
+ break;
+ case PACKET_MANUAL_DETECT:
+ /* let the user beware */
+ break;
}
+}
- SERIAL_RAW (remote_desc);
+/* Should we try the 'P' (set register) request? */
- if (from_tty)
- {
- puts_filtered ("Remote debugging using ");
- puts_filtered (name);
- puts_filtered ("\n");
- }
- push_target (&remote_ops); /* Switch to using remote target now */
+static struct packet_config remote_protocol_P;
- /* Start the remote connection; if error (0), discard this target.
- In particular, if the user quits, be sure to discard it
- (we'd be in an inconsistent state otherwise). */
- if (!catch_errors (remote_start_remote, (char *)0,
- "Couldn't establish connection to remote target\n", RETURN_MASK_ALL))
- pop_target();
+static void
+set_remote_protocol_P_packet_cmd (args, from_tty, c)
+ char *args;
+ int from_tty;
+ struct cmd_list_element *c;
+{
+ set_packet_config_cmd (&remote_protocol_P, c);
}
-/* remote_detach()
- takes a program previously attached to and detaches it.
- We better not have left any breakpoints
- in the program or it'll die when it hits one.
- Close the open connection to the remote debugger.
- Use this when you want to detach and do something else
- with your gdb. */
-
static void
-remote_detach (args, from_tty)
+show_remote_protocol_P_packet_cmd (args, from_tty)
char *args;
int from_tty;
{
- if (args)
- error ("Argument given to \"detach\" when remotely debugging.");
-
- pop_target ();
- if (from_tty)
- puts_filtered ("Ending remote debugging.\n");
+ show_packet_config_cmd (&remote_protocol_P);
}
-/* Convert hex digit A to a number. */
+/* Should we try the 'Z' (set breakpoint) request? */
-static int
-fromhex (a)
- int a;
+static struct packet_config remote_protocol_Z;
+
+static void
+set_remote_protocol_Z_packet_cmd (args, from_tty, c)
+ char *args;
+ int from_tty;
+ struct cmd_list_element *c;
{
- if (a >= '0' && a <= '9')
- return a - '0';
- else if (a >= 'a' && a <= 'f')
- return a - 'a' + 10;
- else
- error ("Reply contains invalid hex digit");
- return -1;
+ set_packet_config_cmd (&remote_protocol_Z, c);
}
-/* Convert number NIB to a hex digit. */
+static void
+show_remote_protocol_Z_packet_cmd (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ show_packet_config_cmd (&remote_protocol_Z);
+}
-static int
-tohex (nib)
- int nib;
+/* Should we try the 'X' (remote binary download) packet?
+
+ This variable (available to the user via "set remote X-packet")
+ dictates whether downloads are sent in binary (via the 'X' packet).
+ We assume that the stub can, and attempt to do it. This will be
+ cleared if the stub does not understand it. This switch is still
+ needed, though in cases when the packet is supported in the stub,
+ but the connection does not allow it (i.e., 7-bit serial connection
+ only). */
+
+static struct packet_config remote_protocol_binary_download;
+
+static void
+set_remote_protocol_binary_download_cmd (char *args,
+ int from_tty,
+ struct cmd_list_element *c)
{
- if (nib < 10)
- return '0'+nib;
- else
- return 'a'+nib-10;
+ set_packet_config_cmd (&remote_protocol_binary_download, c);
}
-\f
-/* Tell the remote machine to resume. */
static void
-remote_resume (pid, step, siggnal)
- int pid, step, siggnal;
+show_remote_protocol_binary_download_cmd (char *args,
+ int from_tty)
{
- char buf[PBUFSIZ];
+ show_packet_config_cmd (&remote_protocol_binary_download);
+}
- if (siggnal)
- {
- char *name;
- target_terminal_ours_for_output ();
- printf_filtered ("Can't send signals to a remote system. ");
- name = strsigno (siggnal);
- if (name)
- printf_filtered (name);
- else
- printf_filtered ("Signal %d", siggnal);
- printf_filtered (" not sent.\n");
- target_terminal_inferior ();
- }
- dcache_flush (remote_dcache);
+/* Tokens for use by the asynchronous signal handlers for SIGINT */
+PTR sigint_remote_twice_token;
+PTR sigint_remote_token;
- strcpy (buf, step ? "s": "c");
+/* These are pointers to hook functions that may be set in order to
+ modify resume/wait behavior for a particular architecture. */
- putpkt (buf);
-}
+void (*target_resume_hook) PARAMS ((void));
+void (*target_wait_loop_hook) PARAMS ((void));
\f
-/* Send ^C to target to halt it. Target will respond, and send us a
- packet. */
+
+
+/* These are the threads which we last sent to the remote system.
+ -1 for all or -2 for not sent yet. */
+static int general_thread;
+static int continue_thread;
+
+/* Call this function as a result of
+ 1) A halt indication (T packet) containing a thread id
+ 2) A direct query of currthread
+ 3) Successful execution of set thread
+ */
static void
-remote_interrupt (signo)
- int signo;
+record_currthread (currthread)
+ int currthread;
{
- /* If this doesn't work, try more severe steps. */
- signal (signo, remote_interrupt_twice);
-
- if (remote_debug)
- printf ("remote_interrupt called\n");
+ general_thread = currthread;
- SERIAL_WRITE (remote_desc, "\003", 1); /* Send a ^C */
+ /* If this is a new thread, add it to GDB's thread list.
+ If we leave it up to WFI to do this, bad things will happen. */
+ if (!in_thread_list (currthread))
+ {
+ add_thread (currthread);
+ printf_filtered ("[New %s]\n", target_pid_to_str (currthread));
+ }
}
-static void (*ofunc)();
+#define MAGIC_NULL_PID 42000
-/* The user typed ^C twice. */
static void
-remote_interrupt_twice (signo)
- int signo;
+set_thread (th, gen)
+ int th;
+ int gen;
{
- signal (signo, ofunc);
-
- target_terminal_ours ();
- if (query ("Interrupted while waiting for the program.\n\
-Give up (and stop debugging it)? "))
+ char *buf = alloca (PBUFSIZ);
+ int state = gen ? general_thread : continue_thread;
+
+ if (state == th)
+ return;
+
+ buf[0] = 'H';
+ buf[1] = gen ? 'g' : 'c';
+ if (th == MAGIC_NULL_PID)
{
- target_mourn_inferior ();
- return_to_top_level (RETURN_QUIT);
+ buf[2] = '0';
+ buf[3] = '\0';
}
+ else if (th < 0)
+ sprintf (&buf[2], "-%x", -th);
else
- {
- signal (signo, remote_interrupt);
- target_terminal_inferior ();
- }
+ sprintf (&buf[2], "%x", th);
+ putpkt (buf);
+ getpkt (buf, 0);
+ if (gen)
+ general_thread = th;
+ else
+ continue_thread = th;
}
-
-/* Wait until the remote machine stops, then return,
- storing status in STATUS just as `wait' would.
- Returns "pid" (though it's not clear what, if anything, that
- means in the case of this target). */
+\f
+/* Return nonzero if the thread TH is still alive on the remote system. */
static int
-remote_wait (status)
- WAITTYPE *status;
+remote_thread_alive (tid)
+ int tid;
{
- unsigned char buf[PBUFSIZ];
- unsigned char *p;
- int i;
- long regno;
- char regs[MAX_REGISTER_RAW_SIZE];
+ char buf[16];
- WSETEXIT ((*status), 0);
+ if (tid < 0)
+ sprintf (buf, "T-%08x", -tid);
+ else
+ sprintf (buf, "T%08x", tid);
+ putpkt (buf);
+ getpkt (buf, 0);
+ return (buf[0] == 'O' && buf[1] == 'K');
+}
- ofunc = (void (*)()) signal (SIGINT, remote_interrupt);
- getpkt ((char *) buf, 1);
- signal (SIGINT, ofunc);
+/* About these extended threadlist and threadinfo packets. They are
+ variable length packets but, the fields within them are often fixed
+ length. They are redundent enough to send over UDP as is the
+ remote protocol in general. There is a matching unit test module
+ in libstub. */
- if (buf[0] == 'E')
- error ("Remote failure reply: %s", buf);
- if (buf[0] == 'T')
- {
- /* Expedited reply, containing Signal, {regno, reg} repeat */
- /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
- ss = signal number
- n... = register number
- r... = register contents
- */
+#define OPAQUETHREADBYTES 8
- p = &buf[3]; /* after Txx */
+/* a 64 bit opaque identifier */
+typedef unsigned char threadref[OPAQUETHREADBYTES];
- while (*p)
- {
- unsigned char *p1;
+/* WARNING: This threadref data structure comes from the remote O.S., libstub
+ protocol encoding, and remote.c. it is not particularly changable */
- regno = strtol (p, &p1, 16); /* Read the register number */
+/* Right now, the internal structure is int. We want it to be bigger.
+ Plan to fix this.
+ */
- if (p1 == p)
- error ("Remote sent badly formed register number: %s\nPacket: '%s'\n",
- p1, buf);
+typedef int gdb_threadref; /* internal GDB thread reference */
- p = p1;
+/* gdb_ext_thread_info is an internal GDB data structure which is
+ equivalint to the reply of the remote threadinfo packet */
- if (*p++ != ':')
- error ("Malformed packet (missing colon): %s\nPacket: '%s'\n",
- p, buf);
+struct gdb_ext_thread_info
+ {
+ threadref threadid; /* External form of thread reference */
+ int active; /* Has state interesting to GDB? , regs, stack */
+ char display[256]; /* Brief state display, name, blocked/syspended */
+ char shortname[32]; /* To be used to name threads */
+ char more_display[256]; /* Long info, statistics, queue depth, whatever */
+ };
- if (regno >= NUM_REGS)
- error ("Remote sent bad register number %d: %s\nPacket: '%s'\n",
- regno, p, buf);
+/* The volume of remote transfers can be limited by submitting
+ a mask containing bits specifying the desired information.
+ Use a union of these values as the 'selection' parameter to
+ get_thread_info. FIXME: Make these TAG names more thread specific.
+ */
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i++)
- {
- if (p[0] == 0 || p[1] == 0)
- error ("Remote reply is too short: %s", buf);
- regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
- p += 2;
- }
+#define TAG_THREADID 1
+#define TAG_EXISTS 2
+#define TAG_DISPLAY 4
+#define TAG_THREADNAME 8
+#define TAG_MOREDISPLAY 16
- if (*p++ != ';')
- error("Remote register badly formatted: %s", buf);
+#define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES*2)
- supply_register (regno, regs);
+char *unpack_varlen_hex PARAMS ((char *buff, int *result));
+
+static char *unpack_nibble PARAMS ((char *buf, int *val));
+
+static char *pack_nibble PARAMS ((char *buf, int nibble));
+
+static char *pack_hex_byte PARAMS ((char *pkt, int /*unsigned char */ byte));
+
+static char *unpack_byte PARAMS ((char *buf, int *value));
+
+static char *pack_int PARAMS ((char *buf, int value));
+
+static char *unpack_int PARAMS ((char *buf, int *value));
+
+static char *unpack_string PARAMS ((char *src, char *dest, int length));
+
+static char *pack_threadid PARAMS ((char *pkt, threadref * id));
+
+static char *unpack_threadid PARAMS ((char *inbuf, threadref * id));
+
+void int_to_threadref PARAMS ((threadref * id, int value));
+
+static int threadref_to_int PARAMS ((threadref * ref));
+
+static void copy_threadref PARAMS ((threadref * dest, threadref * src));
+
+static int threadmatch PARAMS ((threadref * dest, threadref * src));
+
+static char *pack_threadinfo_request PARAMS ((char *pkt, int mode,
+ threadref * id));
+
+static int remote_unpack_thread_info_response PARAMS ((char *pkt,
+ threadref * expectedref,
+ struct gdb_ext_thread_info * info));
+
+
+static int remote_get_threadinfo PARAMS ((threadref * threadid,
+ int fieldset, /*TAG mask */
+ struct gdb_ext_thread_info * info));
+
+static int adapt_remote_get_threadinfo PARAMS ((gdb_threadref * ref,
+ int selection,
+ struct gdb_ext_thread_info * info));
+
+static char *pack_threadlist_request PARAMS ((char *pkt, int startflag,
+ int threadcount,
+ threadref * nextthread));
+
+static int parse_threadlist_response PARAMS ((char *pkt,
+ int result_limit,
+ threadref * original_echo,
+ threadref * resultlist,
+ int *doneflag));
+
+static int remote_get_threadlist PARAMS ((int startflag,
+ threadref * nextthread,
+ int result_limit,
+ int *done,
+ int *result_count,
+ threadref * threadlist));
+
+typedef int (*rmt_thread_action) (threadref * ref, void *context);
+
+static int remote_threadlist_iterator PARAMS ((rmt_thread_action stepfunction,
+ void *context, int looplimit));
+
+static int remote_newthread_step PARAMS ((threadref * ref, void *context));
+
+/* encode 64 bits in 16 chars of hex */
+
+static const char hexchars[] = "0123456789abcdef";
+
+static int
+ishex (ch, val)
+ int ch;
+ int *val;
+{
+ if ((ch >= 'a') && (ch <= 'f'))
+ {
+ *val = ch - 'a' + 10;
+ return 1;
+ }
+ if ((ch >= 'A') && (ch <= 'F'))
+ {
+ *val = ch - 'A' + 10;
+ return 1;
+ }
+ if ((ch >= '0') && (ch <= '9'))
+ {
+ *val = ch - '0';
+ return 1;
+ }
+ return 0;
+}
+
+static int
+stubhex (ch)
+ int ch;
+{
+ if (ch >= 'a' && ch <= 'f')
+ return ch - 'a' + 10;
+ if (ch >= '0' && ch <= '9')
+ return ch - '0';
+ if (ch >= 'A' && ch <= 'F')
+ return ch - 'A' + 10;
+ return -1;
+}
+
+static int
+stub_unpack_int (buff, fieldlength)
+ char *buff;
+ int fieldlength;
+{
+ int nibble;
+ int retval = 0;
+
+ while (fieldlength)
+ {
+ nibble = stubhex (*buff++);
+ retval |= nibble;
+ fieldlength--;
+ if (fieldlength)
+ retval = retval << 4;
+ }
+ return retval;
+}
+
+char *
+unpack_varlen_hex (buff, result)
+ char *buff; /* packet to parse */
+ int *result;
+{
+ int nibble;
+ int retval = 0;
+
+ while (ishex (*buff, &nibble))
+ {
+ buff++;
+ retval = retval << 4;
+ retval |= nibble & 0x0f;
+ }
+ *result = retval;
+ return buff;
+}
+
+static char *
+unpack_nibble (buf, val)
+ char *buf;
+ int *val;
+{
+ ishex (*buf++, val);
+ return buf;
+}
+
+static char *
+pack_nibble (buf, nibble)
+ char *buf;
+ int nibble;
+{
+ *buf++ = hexchars[(nibble & 0x0f)];
+ return buf;
+}
+
+static char *
+pack_hex_byte (pkt, byte)
+ char *pkt;
+ int byte;
+{
+ *pkt++ = hexchars[(byte >> 4) & 0xf];
+ *pkt++ = hexchars[(byte & 0xf)];
+ return pkt;
+}
+
+static char *
+unpack_byte (buf, value)
+ char *buf;
+ int *value;
+{
+ *value = stub_unpack_int (buf, 2);
+ return buf + 2;
+}
+
+static char *
+pack_int (buf, value)
+ char *buf;
+ int value;
+{
+ buf = pack_hex_byte (buf, (value >> 24) & 0xff);
+ buf = pack_hex_byte (buf, (value >> 16) & 0xff);
+ buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
+ buf = pack_hex_byte (buf, (value & 0xff));
+ return buf;
+}
+
+static char *
+unpack_int (buf, value)
+ char *buf;
+ int *value;
+{
+ *value = stub_unpack_int (buf, 8);
+ return buf + 8;
+}
+
+#if 0 /* currently unused, uncomment when needed */
+static char *pack_string PARAMS ((char *pkt, char *string));
+
+static char *
+pack_string (pkt, string)
+ char *pkt;
+ char *string;
+{
+ char ch;
+ int len;
+
+ len = strlen (string);
+ if (len > 200)
+ len = 200; /* Bigger than most GDB packets, junk??? */
+ pkt = pack_hex_byte (pkt, len);
+ while (len-- > 0)
+ {
+ ch = *string++;
+ if ((ch == '\0') || (ch == '#'))
+ ch = '*'; /* Protect encapsulation */
+ *pkt++ = ch;
+ }
+ return pkt;
+}
+#endif /* 0 (unused) */
+
+static char *
+unpack_string (src, dest, length)
+ char *src;
+ char *dest;
+ int length;
+{
+ while (length--)
+ *dest++ = *src++;
+ *dest = '\0';
+ return src;
+}
+
+static char *
+pack_threadid (pkt, id)
+ char *pkt;
+ threadref *id;
+{
+ char *limit;
+ unsigned char *altid;
+
+ altid = (unsigned char *) id;
+ limit = pkt + BUF_THREAD_ID_SIZE;
+ while (pkt < limit)
+ pkt = pack_hex_byte (pkt, *altid++);
+ return pkt;
+}
+
+
+static char *
+unpack_threadid (inbuf, id)
+ char *inbuf;
+ threadref *id;
+{
+ char *altref;
+ char *limit = inbuf + BUF_THREAD_ID_SIZE;
+ int x, y;
+
+ altref = (char *) id;
+
+ while (inbuf < limit)
+ {
+ x = stubhex (*inbuf++);
+ y = stubhex (*inbuf++);
+ *altref++ = (x << 4) | y;
+ }
+ return inbuf;
+}
+
+/* Externally, threadrefs are 64 bits but internally, they are still
+ ints. This is due to a mismatch of specifications. We would like
+ to use 64bit thread references internally. This is an adapter
+ function. */
+
+void
+int_to_threadref (id, value)
+ threadref *id;
+ int value;
+{
+ unsigned char *scan;
+
+ scan = (unsigned char *) id;
+ {
+ int i = 4;
+ while (i--)
+ *scan++ = 0;
+ }
+ *scan++ = (value >> 24) & 0xff;
+ *scan++ = (value >> 16) & 0xff;
+ *scan++ = (value >> 8) & 0xff;
+ *scan++ = (value & 0xff);
+}
+
+static int
+threadref_to_int (ref)
+ threadref *ref;
+{
+ int i, value = 0;
+ unsigned char *scan;
+
+ scan = (char *) ref;
+ scan += 4;
+ i = 4;
+ while (i-- > 0)
+ value = (value << 8) | ((*scan++) & 0xff);
+ return value;
+}
+
+static void
+copy_threadref (dest, src)
+ threadref *dest;
+ threadref *src;
+{
+ int i;
+ unsigned char *csrc, *cdest;
+
+ csrc = (unsigned char *) src;
+ cdest = (unsigned char *) dest;
+ i = 8;
+ while (i--)
+ *cdest++ = *csrc++;
+}
+
+static int
+threadmatch (dest, src)
+ threadref *dest;
+ threadref *src;
+{
+ /* things are broken right now, so just assume we got a match */
+#if 0
+ unsigned char *srcp, *destp;
+ int i, result;
+ srcp = (char *) src;
+ destp = (char *) dest;
+
+ result = 1;
+ while (i-- > 0)
+ result &= (*srcp++ == *destp++) ? 1 : 0;
+ return result;
+#endif
+ return 1;
+}
+
+/*
+ threadid:1, # always request threadid
+ context_exists:2,
+ display:4,
+ unique_name:8,
+ more_display:16
+ */
+
+/* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
+
+static char *
+pack_threadinfo_request (pkt, mode, id)
+ char *pkt;
+ int mode;
+ threadref *id;
+{
+ *pkt++ = 'q'; /* Info Query */
+ *pkt++ = 'P'; /* process or thread info */
+ pkt = pack_int (pkt, mode); /* mode */
+ pkt = pack_threadid (pkt, id); /* threadid */
+ *pkt = '\0'; /* terminate */
+ return pkt;
+}
+
+/* These values tag the fields in a thread info response packet */
+/* Tagging the fields allows us to request specific fields and to
+ add more fields as time goes by */
+
+#define TAG_THREADID 1 /* Echo the thread identifier */
+#define TAG_EXISTS 2 /* Is this process defined enough to
+ fetch registers and its stack */
+#define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
+#define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is */
+#define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
+ the process */
+
+static int
+remote_unpack_thread_info_response (pkt, expectedref, info)
+ char *pkt;
+ threadref *expectedref;
+ struct gdb_ext_thread_info *info;
+{
+ int mask, length;
+ unsigned int tag;
+ threadref ref;
+ char *limit = pkt + PBUFSIZ; /* plausable parsing limit */
+ int retval = 1;
+
+ /* info->threadid = 0; FIXME: implement zero_threadref */
+ info->active = 0;
+ info->display[0] = '\0';
+ info->shortname[0] = '\0';
+ info->more_display[0] = '\0';
+
+ /* Assume the characters indicating the packet type have been stripped */
+ pkt = unpack_int (pkt, &mask); /* arg mask */
+ pkt = unpack_threadid (pkt, &ref);
+
+ if (mask == 0)
+ warning ("Incomplete response to threadinfo request\n");
+ if (!threadmatch (&ref, expectedref))
+ { /* This is an answer to a different request */
+ warning ("ERROR RMT Thread info mismatch\n");
+ return 0;
+ }
+ copy_threadref (&info->threadid, &ref);
+
+ /* Loop on tagged fields , try to bail if somthing goes wrong */
+
+ while ((pkt < limit) && mask && *pkt) /* packets are terminated with nulls */
+ {
+ pkt = unpack_int (pkt, &tag); /* tag */
+ pkt = unpack_byte (pkt, &length); /* length */
+ if (!(tag & mask)) /* tags out of synch with mask */
+ {
+ warning ("ERROR RMT: threadinfo tag mismatch\n");
+ retval = 0;
+ break;
+ }
+ if (tag == TAG_THREADID)
+ {
+ if (length != 16)
+ {
+ warning ("ERROR RMT: length of threadid is not 16\n");
+ retval = 0;
+ break;
+ }
+ pkt = unpack_threadid (pkt, &ref);
+ mask = mask & ~TAG_THREADID;
+ continue;
+ }
+ if (tag == TAG_EXISTS)
+ {
+ info->active = stub_unpack_int (pkt, length);
+ pkt += length;
+ mask = mask & ~(TAG_EXISTS);
+ if (length > 8)
+ {
+ warning ("ERROR RMT: 'exists' length too long\n");
+ retval = 0;
+ break;
+ }
+ continue;
+ }
+ if (tag == TAG_THREADNAME)
+ {
+ pkt = unpack_string (pkt, &info->shortname[0], length);
+ mask = mask & ~TAG_THREADNAME;
+ continue;
+ }
+ if (tag == TAG_DISPLAY)
+ {
+ pkt = unpack_string (pkt, &info->display[0], length);
+ mask = mask & ~TAG_DISPLAY;
+ continue;
+ }
+ if (tag == TAG_MOREDISPLAY)
+ {
+ pkt = unpack_string (pkt, &info->more_display[0], length);
+ mask = mask & ~TAG_MOREDISPLAY;
+ continue;
+ }
+ warning ("ERROR RMT: unknown thread info tag\n");
+ break; /* Not a tag we know about */
+ }
+ return retval;
+}
+
+static int
+remote_get_threadinfo (threadid, fieldset, info)
+ threadref *threadid;
+ int fieldset; /* TAG mask */
+ struct gdb_ext_thread_info *info;
+{
+ int result;
+ char *threadinfo_pkt = alloca (PBUFSIZ);
+
+ pack_threadinfo_request (threadinfo_pkt, fieldset, threadid);
+ putpkt (threadinfo_pkt);
+ getpkt (threadinfo_pkt, 0);
+ result = remote_unpack_thread_info_response (threadinfo_pkt + 2, threadid,
+ info);
+ return result;
+}
+
+/* Unfortunately, 61 bit thread-ids are bigger than the internal
+ representation of a threadid. */
+
+static int
+adapt_remote_get_threadinfo (ref, selection, info)
+ gdb_threadref *ref;
+ int selection;
+ struct gdb_ext_thread_info *info;
+{
+ threadref lclref;
+
+ int_to_threadref (&lclref, *ref);
+ return remote_get_threadinfo (&lclref, selection, info);
+}
+
+/* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
+
+static char *
+pack_threadlist_request (pkt, startflag, threadcount, nextthread)
+ char *pkt;
+ int startflag;
+ int threadcount;
+ threadref *nextthread;
+{
+ *pkt++ = 'q'; /* info query packet */
+ *pkt++ = 'L'; /* Process LIST or threadLIST request */
+ pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
+ pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
+ pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
+ *pkt = '\0';
+ return pkt;
+}
+
+/* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
+
+static int
+parse_threadlist_response (pkt, result_limit, original_echo, resultlist,
+ doneflag)
+ char *pkt;
+ int result_limit;
+ threadref *original_echo;
+ threadref *resultlist;
+ int *doneflag;
+{
+ char *limit;
+ int count, resultcount, done;
+
+ resultcount = 0;
+ /* Assume the 'q' and 'M chars have been stripped. */
+ limit = pkt + (PBUFSIZ - BUF_THREAD_ID_SIZE); /* done parse past here */
+ pkt = unpack_byte (pkt, &count); /* count field */
+ pkt = unpack_nibble (pkt, &done);
+ /* The first threadid is the argument threadid. */
+ pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
+ while ((count-- > 0) && (pkt < limit))
+ {
+ pkt = unpack_threadid (pkt, resultlist++);
+ if (resultcount++ >= result_limit)
+ break;
+ }
+ if (doneflag)
+ *doneflag = done;
+ return resultcount;
+}
+
+static int
+remote_get_threadlist (startflag, nextthread, result_limit,
+ done, result_count, threadlist)
+ int startflag;
+ threadref *nextthread;
+ int result_limit;
+ int *done;
+ int *result_count;
+ threadref *threadlist;
+
+{
+ static threadref echo_nextthread;
+ char *threadlist_packet = alloca (PBUFSIZ);
+ char *t_response = alloca (PBUFSIZ);
+ int result = 1;
+
+ /* Trancate result limit to be smaller than the packet size */
+ if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) >= PBUFSIZ)
+ result_limit = (PBUFSIZ / BUF_THREAD_ID_SIZE) - 2;
+
+ pack_threadlist_request (threadlist_packet,
+ startflag, result_limit, nextthread);
+ putpkt (threadlist_packet);
+ getpkt (t_response, 0);
+
+ *result_count =
+ parse_threadlist_response (t_response + 2, result_limit, &echo_nextthread,
+ threadlist, done);
+
+ if (!threadmatch (&echo_nextthread, nextthread))
+ {
+ /* FIXME: This is a good reason to drop the packet */
+ /* Possably, there is a duplicate response */
+ /* Possabilities :
+ retransmit immediatly - race conditions
+ retransmit after timeout - yes
+ exit
+ wait for packet, then exit
+ */
+ warning ("HMM: threadlist did not echo arg thread, dropping it\n");
+ return 0; /* I choose simply exiting */
+ }
+ if (*result_count <= 0)
+ {
+ if (*done != 1)
+ {
+ warning ("RMT ERROR : failed to get remote thread list\n");
+ result = 0;
+ }
+ return result; /* break; */
+ }
+ if (*result_count > result_limit)
+ {
+ *result_count = 0;
+ warning ("RMT ERROR: threadlist response longer than requested\n");
+ return 0;
+ }
+ return result;
+}
+
+/* This is the interface between remote and threads, remotes upper interface */
+
+/* remote_find_new_threads retrieves the thread list and for each
+ thread in the list, looks up the thread in GDB's internal list,
+ ading the thread if it does not already exist. This involves
+ getting partial thread lists from the remote target so, polling the
+ quit_flag is required. */
+
+
+/* About this many threadisds fit in a packet. */
+
+#define MAXTHREADLISTRESULTS 32
+
+static int
+remote_threadlist_iterator (stepfunction, context, looplimit)
+ rmt_thread_action stepfunction;
+ void *context;
+ int looplimit;
+{
+ int done, i, result_count;
+ int startflag = 1;
+ int result = 1;
+ int loopcount = 0;
+ static threadref nextthread;
+ static threadref resultthreadlist[MAXTHREADLISTRESULTS];
+
+ done = 0;
+ while (!done)
+ {
+ if (loopcount++ > looplimit)
+ {
+ result = 0;
+ warning ("Remote fetch threadlist -infinite loop-\n");
+ break;
+ }
+ if (!remote_get_threadlist (startflag, &nextthread, MAXTHREADLISTRESULTS,
+ &done, &result_count, resultthreadlist))
+ {
+ result = 0;
+ break;
+ }
+ /* clear for later iterations */
+ startflag = 0;
+ /* Setup to resume next batch of thread references, set nextthread. */
+ if (result_count >= 1)
+ copy_threadref (&nextthread, &resultthreadlist[result_count - 1]);
+ i = 0;
+ while (result_count--)
+ if (!(result = (*stepfunction) (&resultthreadlist[i++], context)))
+ break;
+ }
+ return result;
+}
+
+static int
+remote_newthread_step (ref, context)
+ threadref *ref;
+ void *context;
+{
+ int pid;
+
+ pid = threadref_to_int (ref);
+ if (!in_thread_list (pid))
+ add_thread (pid);
+ return 1; /* continue iterator */
+}
+
+#define CRAZY_MAX_THREADS 1000
+
+static int
+remote_current_thread (oldpid)
+ int oldpid;
+{
+ char *buf = alloca (PBUFSIZ);
+
+ putpkt ("qC");
+ getpkt (buf, 0);
+ if (buf[0] == 'Q' && buf[1] == 'C')
+ return strtol (&buf[2], NULL, 16);
+ else
+ return oldpid;
+}
+
+/* Find new threads for info threads command. */
+
+static void
+remote_find_new_threads ()
+{
+ remote_threadlist_iterator (remote_newthread_step, 0,
+ CRAZY_MAX_THREADS);
+ if (inferior_pid == MAGIC_NULL_PID) /* ack ack ack */
+ inferior_pid = remote_current_thread (inferior_pid);
+}
+
+static void
+remote_threads_info (void)
+{
+ char *buf = alloca (PBUFSIZ);
+ char *bufp;
+ int tid;
+
+ if (remote_desc == 0) /* paranoia */
+ error ("Command can only be used when connected to the remote target.");
+
+ putpkt ("qfThreadInfo");
+ getpkt (bufp = buf, 0);
+ if (bufp[0] == '\0') /* q packet not recognized! */
+ { /* try old jmetzler method */
+ remote_find_new_threads ();
+ return;
+ }
+ else /* try new 'q' method */
+ while (*bufp++ == 'm') /* reply contains one or more TID */
+ {
+ do
+ {
+ tid = strtol (bufp, &bufp, 16);
+ if (tid != 0 && !in_thread_list (tid))
+ add_thread (tid);
+ }
+ while (*bufp++ == ','); /* comma-separated list */
+ putpkt ("qsThreadInfo");
+ getpkt (bufp = buf, 0);
+ }
+}
+\f
+
+/* Restart the remote side; this is an extended protocol operation. */
+
+static void
+extended_remote_restart ()
+{
+ char *buf = alloca (PBUFSIZ);
+
+ /* Send the restart command; for reasons I don't understand the
+ remote side really expects a number after the "R". */
+ buf[0] = 'R';
+ sprintf (&buf[1], "%x", 0);
+ putpkt (buf);
+
+ /* Now query for status so this looks just like we restarted
+ gdbserver from scratch. */
+ putpkt ("?");
+ getpkt (buf, 0);
+}
+\f
+/* Clean up connection to a remote debugger. */
+
+/* ARGSUSED */
+static void
+remote_close (quitting)
+ int quitting;
+{
+ if (remote_desc)
+ SERIAL_CLOSE (remote_desc);
+ remote_desc = NULL;
+}
+
+/* Query the remote side for the text, data and bss offsets. */
+
+static void
+get_offsets ()
+{
+ char *buf = alloca (PBUFSIZ);
+ char *ptr;
+ int lose;
+ CORE_ADDR text_addr, data_addr, bss_addr;
+ struct section_offsets *offs;
+
+ putpkt ("qOffsets");
+
+ getpkt (buf, 0);
+
+ if (buf[0] == '\000')
+ return; /* Return silently. Stub doesn't support
+ this command. */
+ if (buf[0] == 'E')
+ {
+ warning ("Remote failure reply: %s", buf);
+ return;
+ }
+
+ /* Pick up each field in turn. This used to be done with scanf, but
+ scanf will make trouble if CORE_ADDR size doesn't match
+ conversion directives correctly. The following code will work
+ with any size of CORE_ADDR. */
+ text_addr = data_addr = bss_addr = 0;
+ ptr = buf;
+ lose = 0;
+
+ if (strncmp (ptr, "Text=", 5) == 0)
+ {
+ ptr += 5;
+ /* Don't use strtol, could lose on big values. */
+ while (*ptr && *ptr != ';')
+ text_addr = (text_addr << 4) + fromhex (*ptr++);
+ }
+ else
+ lose = 1;
+
+ if (!lose && strncmp (ptr, ";Data=", 6) == 0)
+ {
+ ptr += 6;
+ while (*ptr && *ptr != ';')
+ data_addr = (data_addr << 4) + fromhex (*ptr++);
+ }
+ else
+ lose = 1;
+
+ if (!lose && strncmp (ptr, ";Bss=", 5) == 0)
+ {
+ ptr += 5;
+ while (*ptr && *ptr != ';')
+ bss_addr = (bss_addr << 4) + fromhex (*ptr++);
+ }
+ else
+ lose = 1;
+
+ if (lose)
+ error ("Malformed response to offset query, %s", buf);
+
+ if (symfile_objfile == NULL)
+ return;
+
+ offs = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS);
+ memcpy (offs, symfile_objfile->section_offsets, SIZEOF_SECTION_OFFSETS);
+
+ ANOFFSET (offs, SECT_OFF_TEXT) = text_addr;
+
+ /* This is a temporary kludge to force data and bss to use the same offsets
+ because that's what nlmconv does now. The real solution requires changes
+ to the stub and remote.c that I don't have time to do right now. */
+
+ ANOFFSET (offs, SECT_OFF_DATA) = data_addr;
+ ANOFFSET (offs, SECT_OFF_BSS) = data_addr;
+
+ objfile_relocate (symfile_objfile, offs);
+}
+
+/*
+ * Cisco version of section offsets:
+ *
+ * Instead of having GDB query the target for the section offsets,
+ * Cisco lets the target volunteer the information! It's also in
+ * a different format, so here are the functions that will decode
+ * a section offset packet from a Cisco target.
+ */
+
+/*
+ * Function: remote_cisco_section_offsets
+ *
+ * Returns: zero for success, non-zero for failure
+ */
+
+static int
+remote_cisco_section_offsets (text_addr, data_addr, bss_addr,
+ text_offs, data_offs, bss_offs)
+ bfd_vma text_addr;
+ bfd_vma data_addr;
+ bfd_vma bss_addr;
+ bfd_signed_vma *text_offs;
+ bfd_signed_vma *data_offs;
+ bfd_signed_vma *bss_offs;
+{
+ bfd_vma text_base, data_base, bss_base;
+ struct minimal_symbol *start;
+ asection *sect;
+ bfd *abfd;
+ int len;
+ char *p;
+
+ if (symfile_objfile == NULL)
+ return -1; /* no can do nothin' */
+
+ start = lookup_minimal_symbol ("_start", NULL, NULL);
+ if (start == NULL)
+ return -1; /* Can't find "_start" symbol */
+
+ data_base = bss_base = 0;
+ text_base = SYMBOL_VALUE_ADDRESS (start);
+
+ abfd = symfile_objfile->obfd;
+ for (sect = abfd->sections;
+ sect != 0;
+ sect = sect->next)
+ {
+ p = (unsigned char *) bfd_get_section_name (abfd, sect);
+ len = strlen (p);
+ if (strcmp (p + len - 4, "data") == 0) /* ends in "data" */
+ if (data_base == 0 ||
+ data_base > bfd_get_section_vma (abfd, sect))
+ data_base = bfd_get_section_vma (abfd, sect);
+ if (strcmp (p + len - 3, "bss") == 0) /* ends in "bss" */
+ if (bss_base == 0 ||
+ bss_base > bfd_get_section_vma (abfd, sect))
+ bss_base = bfd_get_section_vma (abfd, sect);
+ }
+ *text_offs = text_addr - text_base;
+ *data_offs = data_addr - data_base;
+ *bss_offs = bss_addr - bss_base;
+ if (remote_debug)
+ {
+ char tmp[128];
+
+ sprintf (tmp, "VMA: text = 0x");
+ sprintf_vma (tmp + strlen (tmp), text_addr);
+ sprintf (tmp + strlen (tmp), " data = 0x");
+ sprintf_vma (tmp + strlen (tmp), data_addr);
+ sprintf (tmp + strlen (tmp), " bss = 0x");
+ sprintf_vma (tmp + strlen (tmp), bss_addr);
+ fprintf_filtered (gdb_stdlog, tmp);
+ fprintf_filtered (gdb_stdlog,
+ "Reloc offset: text = 0x%s data = 0x%s bss = 0x%s\n",
+ paddr_nz (*text_offs),
+ paddr_nz (*data_offs),
+ paddr_nz (*bss_offs));
+ }
+
+ return 0;
+}
+
+/*
+ * Function: remote_cisco_objfile_relocate
+ *
+ * Relocate the symbol file for a remote target.
+ */
+
+void
+remote_cisco_objfile_relocate (text_off, data_off, bss_off)
+ bfd_signed_vma text_off;
+ bfd_signed_vma data_off;
+ bfd_signed_vma bss_off;
+{
+ struct section_offsets *offs;
+
+ if (text_off != 0 || data_off != 0 || bss_off != 0)
+ {
+ /* FIXME: This code assumes gdb-stabs.h is being used; it's
+ broken for xcoff, dwarf, sdb-coff, etc. But there is no
+ simple canonical representation for this stuff. */
+
+ offs = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS);
+ memcpy (offs, symfile_objfile->section_offsets, SIZEOF_SECTION_OFFSETS);
+
+ ANOFFSET (offs, SECT_OFF_TEXT) = text_off;
+ ANOFFSET (offs, SECT_OFF_DATA) = data_off;
+ ANOFFSET (offs, SECT_OFF_BSS) = bss_off;
+
+ /* First call the standard objfile_relocate. */
+ objfile_relocate (symfile_objfile, offs);
+
+ /* Now we need to fix up the section entries already attached to
+ the exec target. These entries will control memory transfers
+ from the exec file. */
+
+ exec_set_section_offsets (text_off, data_off, bss_off);
+ }
+}
+
+/* Stub for catch_errors. */
+
+static int
+remote_start_remote_dummy (dummy)
+ char *dummy;
+{
+ start_remote (); /* Initialize gdb process mechanisms */
+ return 1;
+}
+
+static int
+remote_start_remote (dummy)
+ PTR dummy;
+{
+ immediate_quit = 1; /* Allow user to interrupt it */
+
+ /* Ack any packet which the remote side has already sent. */
+ SERIAL_WRITE (remote_desc, "+", 1);
+
+ /* Let the stub know that we want it to return the thread. */
+ set_thread (-1, 0);
+
+ inferior_pid = remote_current_thread (inferior_pid);
+
+ get_offsets (); /* Get text, data & bss offsets */
+
+ putpkt ("?"); /* initiate a query from remote machine */
+ immediate_quit = 0;
+
+ return remote_start_remote_dummy (dummy);
+}
+
+/* Open a connection to a remote debugger.
+ NAME is the filename used for communication. */
+
+static void
+remote_open (name, from_tty)
+ char *name;
+ int from_tty;
+{
+ remote_open_1 (name, from_tty, &remote_ops, 0);
+}
+
+/* Just like remote_open, but with asynchronous support. */
+static void
+remote_async_open (name, from_tty)
+ char *name;
+ int from_tty;
+{
+ remote_async_open_1 (name, from_tty, &remote_async_ops, 0);
+}
+
+/* Open a connection to a remote debugger using the extended
+ remote gdb protocol. NAME is the filename used for communication. */
+
+static void
+extended_remote_open (name, from_tty)
+ char *name;
+ int from_tty;
+{
+ remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */ );
+}
+
+/* Just like extended_remote_open, but with asynchronous support. */
+static void
+extended_remote_async_open (name, from_tty)
+ char *name;
+ int from_tty;
+{
+ remote_async_open_1 (name, from_tty, &extended_async_remote_ops, 1 /*extended_p */ );
+}
+
+/* Generic code for opening a connection to a remote target. */
+
+static DCACHE *remote_dcache;
+
+static void
+remote_open_1 (name, from_tty, target, extended_p)
+ char *name;
+ int from_tty;
+ struct target_ops *target;
+ int extended_p;
+{
+ if (name == 0)
+ error ("To open a remote debug connection, you need to specify what\n\
+serial device is attached to the remote system (e.g. /dev/ttya).");
+
+ target_preopen (from_tty);
+
+ unpush_target (target);
+
+ remote_dcache = dcache_init (remote_read_bytes, remote_write_bytes);
+
+ remote_desc = SERIAL_OPEN (name);
+ if (!remote_desc)
+ perror_with_name (name);
+
+ if (baud_rate != -1)
+ {
+ if (SERIAL_SETBAUDRATE (remote_desc, baud_rate))
+ {
+ SERIAL_CLOSE (remote_desc);
+ perror_with_name (name);
+ }
+ }
+
+ SERIAL_RAW (remote_desc);
+
+ /* If there is something sitting in the buffer we might take it as a
+ response to a command, which would be bad. */
+ SERIAL_FLUSH_INPUT (remote_desc);
+
+ if (from_tty)
+ {
+ puts_filtered ("Remote debugging using ");
+ puts_filtered (name);
+ puts_filtered ("\n");
+ }
+ push_target (target); /* Switch to using remote target now */
+
+ init_packet_config (&remote_protocol_P);
+ init_packet_config (&remote_protocol_Z);
+
+ general_thread = -2;
+ continue_thread = -2;
+
+ /* Force remote_write_bytes to check whether target supports
+ binary downloading. */
+ init_packet_config (&remote_protocol_binary_download);
+
+ /* Without this, some commands which require an active target (such
+ as kill) won't work. This variable serves (at least) double duty
+ as both the pid of the target process (if it has such), and as a
+ flag indicating that a target is active. These functions should
+ be split out into seperate variables, especially since GDB will
+ someday have a notion of debugging several processes. */
+
+ inferior_pid = MAGIC_NULL_PID;
+ /* Start the remote connection; if error (0), discard this target.
+ In particular, if the user quits, be sure to discard it
+ (we'd be in an inconsistent state otherwise). */
+ if (!catch_errors (remote_start_remote, NULL,
+ "Couldn't establish connection to remote target\n",
+ RETURN_MASK_ALL))
+ {
+ pop_target ();
+ return;
+ }
+
+ if (extended_p)
+ {
+ /* tell the remote that we're using the extended protocol. */
+ char *buf = alloca (PBUFSIZ);
+ putpkt ("!");
+ getpkt (buf, 0);
+ }
+}
+
+/* Just like remote_open but with asynchronous support. */
+static void
+remote_async_open_1 (name, from_tty, target, extended_p)
+ char *name;
+ int from_tty;
+ struct target_ops *target;
+ int extended_p;
+{
+ if (name == 0)
+ error ("To open a remote debug connection, you need to specify what\n\
+serial device is attached to the remote system (e.g. /dev/ttya).");
+
+ target_preopen (from_tty);
+
+ unpush_target (target);
+
+ remote_dcache = dcache_init (remote_read_bytes, remote_write_bytes);
+
+ remote_desc = SERIAL_OPEN (name);
+ if (!remote_desc)
+ perror_with_name (name);
+
+ if (baud_rate != -1)
+ {
+ if (SERIAL_SETBAUDRATE (remote_desc, baud_rate))
+ {
+ SERIAL_CLOSE (remote_desc);
+ perror_with_name (name);
+ }
+ }
+
+ SERIAL_RAW (remote_desc);
+
+ /* If there is something sitting in the buffer we might take it as a
+ response to a command, which would be bad. */
+ SERIAL_FLUSH_INPUT (remote_desc);
+
+ if (from_tty)
+ {
+ puts_filtered ("Remote debugging using ");
+ puts_filtered (name);
+ puts_filtered ("\n");
+ }
+
+ /* If running in asynchronous mode, register the target with the
+ event loop. Set things up so that when there is an event on the
+ file descriptor, the event loop will call fetch_inferior_event,
+ which will do the proper analysis to determine what happened. */
+ if (async_p)
+ add_file_handler (remote_desc->fd, fetch_inferior_event, 0);
+
+ push_target (target); /* Switch to using remote target now */
+
+ init_packet_config (&remote_protocol_P);
+ init_packet_config (&remote_protocol_Z);
+
+ general_thread = -2;
+ continue_thread = -2;
+
+ /* Force remote_write_bytes to check whether target supports
+ binary downloading. */
+ init_packet_config (&remote_protocol_binary_download);
+
+ /* If running asynchronously, set things up for telling the target
+ to use the extended protocol. This will happen only after the
+ target has been connected to, in fetch_inferior_event. */
+ if (extended_p && async_p)
+ add_continuation (set_extended_protocol, NULL);
+
+ /* Without this, some commands which require an active target (such
+ as kill) won't work. This variable serves (at least) double duty
+ as both the pid of the target process (if it has such), and as a
+ flag indicating that a target is active. These functions should
+ be split out into seperate variables, especially since GDB will
+ someday have a notion of debugging several processes. */
+
+ inferior_pid = MAGIC_NULL_PID;
+ /* Start the remote connection; if error (0), discard this target.
+ In particular, if the user quits, be sure to discard it
+ (we'd be in an inconsistent state otherwise). */
+ if (!catch_errors (remote_start_remote, NULL,
+ "Couldn't establish connection to remote target\n",
+ RETURN_MASK_ALL))
+ {
+ /* Unregister the file descriptor from the event loop. */
+ if (async_p)
+ delete_file_handler (remote_desc->fd);
+ pop_target ();
+ return;
+ }
+
+ if (!async_p)
+ {
+ if (extended_p)
+ {
+ /* tell the remote that we're using the extended protocol. */
+ char *buf = alloca (PBUFSIZ);
+ putpkt ("!");
+ getpkt (buf, 0);
+ }
+ }
+}
+
+/* This will be called by fetch_inferior_event, via the
+ cmd_continuation pointer, only after the target has stopped. */
+static void
+set_extended_protocol (arg)
+ struct continuation_arg *arg;
+{
+ /* tell the remote that we're using the extended protocol. */
+ char *buf = alloca (PBUFSIZ);
+ putpkt ("!");
+ getpkt (buf, 0);
+}
+
+/* This takes a program previously attached to and detaches it. After
+ this is done, GDB can be used to debug some other program. We
+ better not have left any breakpoints in the target program or it'll
+ die when it hits one. */
+
+static void
+remote_detach (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ char *buf = alloca (PBUFSIZ);
+
+ if (args)
+ error ("Argument given to \"detach\" when remotely debugging.");
+
+ /* Tell the remote target to detach. */
+ strcpy (buf, "D");
+ remote_send (buf);
+
+ pop_target ();
+ if (from_tty)
+ puts_filtered ("Ending remote debugging.\n");
+
+}
+
+/* Same as remote_detach, but with async support. */
+static void
+remote_async_detach (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ char *buf = alloca (PBUFSIZ);
+
+ if (args)
+ error ("Argument given to \"detach\" when remotely debugging.");
+
+ /* Tell the remote target to detach. */
+ strcpy (buf, "D");
+ remote_send (buf);
+
+ /* Unregister the file descriptor from the event loop. */
+ if (async_p)
+ delete_file_handler (remote_desc->fd);
+
+ pop_target ();
+ if (from_tty)
+ puts_filtered ("Ending remote debugging.\n");
+}
+
+/* Convert hex digit A to a number. */
+
+int
+fromhex (a)
+ int a;
+{
+ if (a >= '0' && a <= '9')
+ return a - '0';
+ else if (a >= 'a' && a <= 'f')
+ return a - 'a' + 10;
+ else if (a >= 'A' && a <= 'F')
+ return a - 'A' + 10;
+ else
+ error ("Reply contains invalid hex digit %d", a);
+}
+
+/* Convert number NIB to a hex digit. */
+
+static int
+tohex (nib)
+ int nib;
+{
+ if (nib < 10)
+ return '0' + nib;
+ else
+ return 'a' + nib - 10;
+}
+\f
+/* Tell the remote machine to resume. */
+
+static enum target_signal last_sent_signal = TARGET_SIGNAL_0;
+
+static int last_sent_step;
+
+static void
+remote_resume (pid, step, siggnal)
+ int pid, step;
+ enum target_signal siggnal;
+{
+ char *buf = alloca (PBUFSIZ);
+
+ if (pid == -1)
+ set_thread (0, 0); /* run any thread */
+ else
+ set_thread (pid, 0); /* run this thread */
+
+ dcache_flush (remote_dcache);
+
+ last_sent_signal = siggnal;
+ last_sent_step = step;
+
+ /* A hook for when we need to do something at the last moment before
+ resumption. */
+ if (target_resume_hook)
+ (*target_resume_hook) ();
+
+ if (siggnal != TARGET_SIGNAL_0)
+ {
+ buf[0] = step ? 'S' : 'C';
+ buf[1] = tohex (((int) siggnal >> 4) & 0xf);
+ buf[2] = tohex ((int) siggnal & 0xf);
+ buf[3] = '\0';
+ }
+ else
+ strcpy (buf, step ? "s" : "c");
+
+ putpkt (buf);
+}
+
+/* Same as remote_resume, but with async support. */
+static void
+remote_async_resume (pid, step, siggnal)
+ int pid, step;
+ enum target_signal siggnal;
+{
+ char *buf = alloca (PBUFSIZ);
+
+ if (pid == -1)
+ set_thread (0, 0); /* run any thread */
+ else
+ set_thread (pid, 0); /* run this thread */
+
+ dcache_flush (remote_dcache);
+
+ last_sent_signal = siggnal;
+ last_sent_step = step;
+
+ /* A hook for when we need to do something at the last moment before
+ resumption. */
+ if (target_resume_hook)
+ (*target_resume_hook) ();
+
+ /* Set things up before execution starts for async commands. */
+ /* This function can be entered more than once for the same execution
+ command, because it is also called by handle_inferior_event. So
+ we make sure that we don't do the initialization for sync
+ execution more than once. */
+ if (async_p && !target_executing)
+ {
+ target_executing = 1;
+
+ /* If the command must look synchronous, fake it, by making gdb
+ display an empty prompt after the command has completed. Also
+ disable input. */
+ if (sync_execution)
+ {
+ push_prompt ("", "", "");
+ delete_file_handler (input_fd);
+ initialize_sigint_signal_handler ();
+ }
+ }
+
+ if (siggnal != TARGET_SIGNAL_0)
+ {
+ buf[0] = step ? 'S' : 'C';
+ buf[1] = tohex (((int) siggnal >> 4) & 0xf);
+ buf[2] = tohex ((int) siggnal & 0xf);
+ buf[3] = '\0';
+ }
+ else
+ strcpy (buf, step ? "s" : "c");
+
+ putpkt (buf);
+}
+\f
+
+/* Set up the signal handler for SIGINT, while the target is
+ executing, ovewriting the 'regular' SIGINT signal handler. */
+static void
+initialize_sigint_signal_handler ()
+{
+ sigint_remote_token =
+ create_async_signal_handler (async_remote_interrupt, NULL);
+ signal (SIGINT, handle_remote_sigint);
+}
+
+/* Signal handler for SIGINT, while the target is executing. */
+static void
+handle_remote_sigint (sig)
+ int sig;
+{
+ signal (sig, handle_remote_sigint_twice);
+ sigint_remote_twice_token =
+ create_async_signal_handler (async_remote_interrupt_twice, NULL);
+ mark_async_signal_handler_wrapper (sigint_remote_token);
+}
+
+/* Signal handler for SIGINT, installed after SIGINT has already been
+ sent once. It will take effect the second time that the user sends
+ a ^C. */
+static void
+handle_remote_sigint_twice (sig)
+ int sig;
+{
+ signal (sig, handle_sigint);
+ sigint_remote_twice_token =
+ create_async_signal_handler (async_remote_interrupt, NULL);
+ mark_async_signal_handler_wrapper (sigint_remote_twice_token);
+}
+
+/* Perform the real interruption of hte target execution, in response
+ to a ^C. */
+static void
+async_remote_interrupt (arg)
+ gdb_client_data arg;
+{
+ if (remote_debug)
+ fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
+
+ target_stop ();
+}
+
+/* Perform interrupt, if the first attempt did not succeed. Just give
+ up on the target alltogether. */
+static void
+async_remote_interrupt_twice (arg)
+ gdb_client_data arg;
+{
+ interrupt_query ();
+ signal (SIGINT, handle_remote_sigint);
+}
+
+/* Reinstall the usual SIGINT handlers, after the target has
+ stopped. */
+void
+cleanup_sigint_signal_handler ()
+{
+ signal (SIGINT, handle_sigint);
+ if (sigint_remote_twice_token)
+ delete_async_signal_handler ((async_signal_handler **) & sigint_remote_twice_token);
+ if (sigint_remote_token)
+ delete_async_signal_handler ((async_signal_handler **) & sigint_remote_token);
+}
+
+/* Send ^C to target to halt it. Target will respond, and send us a
+ packet. */
+static void (*ofunc) PARAMS ((int));
+
+/* The command line interface's stop routine. This function is installed
+ as a signal handler for SIGINT. The first time a user requests a
+ stop, we call remote_stop to send a break or ^C. If there is no
+ response from the target (it didn't stop when the user requested it),
+ we ask the user if he'd like to detach from the target. */
+static void
+remote_interrupt (signo)
+ int signo;
+{
+ /* If this doesn't work, try more severe steps. */
+ signal (signo, remote_interrupt_twice);
+
+ if (remote_debug)
+ fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
+
+ target_stop ();
+}
+
+/* The user typed ^C twice. */
+
+static void
+remote_interrupt_twice (signo)
+ int signo;
+{
+ signal (signo, ofunc);
+ interrupt_query ();
+ signal (signo, remote_interrupt);
+}
+
+/* This is the generic stop called via the target vector. When a target
+ interrupt is requested, either by the command line or the GUI, we
+ will eventually end up here. */
+static void
+remote_stop ()
+{
+ /* Send a break or a ^C, depending on user preference. */
+ if (remote_debug)
+ fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
+
+ if (remote_break)
+ SERIAL_SEND_BREAK (remote_desc);
+ else
+ SERIAL_WRITE (remote_desc, "\003", 1);
+}
+
+/* Ask the user what to do when an interrupt is received. */
+
+static void
+interrupt_query ()
+{
+ target_terminal_ours ();
+
+ if (query ("Interrupted while waiting for the program.\n\
+Give up (and stop debugging it)? "))
+ {
+ target_mourn_inferior ();
+ return_to_top_level (RETURN_QUIT);
+ }
+
+ target_terminal_inferior ();
+}
+
+/* If nonzero, ignore the next kill. */
+
+int kill_kludge;
+
+void
+remote_console_output (msg)
+ char *msg;
+{
+ char *p;
+
+ for (p = msg; p[0] && p[1]; p += 2)
+ {
+ char tb[2];
+ char c = fromhex (p[0]) * 16 + fromhex (p[1]);
+ tb[0] = c;
+ tb[1] = 0;
+ fputs_unfiltered (tb, gdb_stdtarg);
+ }
+}
+
+/* Wait until the remote machine stops, then return,
+ storing status in STATUS just as `wait' would.
+ Returns "pid", which in the case of a multi-threaded
+ remote OS, is the thread-id. */
+
+static int
+remote_wait (pid, status)
+ int pid;
+ struct target_waitstatus *status;
+{
+ unsigned char *buf = alloca (PBUFSIZ);
+ int thread_num = -1;
+
+ status->kind = TARGET_WAITKIND_EXITED;
+ status->value.integer = 0;
+
+ while (1)
+ {
+ unsigned char *p;
+
+ ofunc = signal (SIGINT, remote_interrupt);
+ getpkt ((char *) buf, 1);
+ signal (SIGINT, ofunc);
+
+ /* This is a hook for when we need to do something (perhaps the
+ collection of trace data) every time the target stops. */
+ if (target_wait_loop_hook)
+ (*target_wait_loop_hook) ();
+
+ switch (buf[0])
+ {
+ case 'E': /* Error of some sort */
+ warning ("Remote failure reply: %s", buf);
+ continue;
+ case 'T': /* Status with PC, SP, FP, ... */
+ {
+ int i;
+ long regno;
+ char regs[MAX_REGISTER_RAW_SIZE];
+
+ /* Expedited reply, containing Signal, {regno, reg} repeat */
+ /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
+ ss = signal number
+ n... = register number
+ r... = register contents
+ */
+ p = &buf[3]; /* after Txx */
+
+ while (*p)
+ {
+ unsigned char *p1;
+ char *p_temp;
+
+ /* Read the register number */
+ regno = strtol ((const char *) p, &p_temp, 16);
+ p1 = (unsigned char *) p_temp;
+
+ if (p1 == p) /* No register number present here */
+ {
+ p1 = (unsigned char *) strchr ((const char *) p, ':');
+ if (p1 == NULL)
+ warning ("Malformed packet(a) (missing colon): %s\n\
+Packet: '%s'\n",
+ p, buf);
+ if (strncmp ((const char *) p, "thread", p1 - p) == 0)
+ {
+ p_temp = unpack_varlen_hex (++p1, &thread_num);
+ record_currthread (thread_num);
+ p = (unsigned char *) p_temp;
+ }
+ }
+ else
+ {
+ p = p1;
+
+ if (*p++ != ':')
+ warning ("Malformed packet(b) (missing colon): %s\n\
+Packet: '%s'\n",
+ p, buf);
+
+ if (regno >= NUM_REGS)
+ warning ("Remote sent bad register number %ld: %s\n\
+Packet: '%s'\n",
+ regno, p, buf);
+
+ for (i = 0; i < REGISTER_RAW_SIZE (regno); i++)
+ {
+ if (p[0] == 0 || p[1] == 0)
+ warning ("Remote reply is too short: %s", buf);
+ regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
+ p += 2;
+ }
+ supply_register (regno, regs);
+ }
+
+ if (*p++ != ';')
+ {
+ warning ("Remote register badly formatted: %s", buf);
+ warning (" here: %s", p);
+ }
+ }
+ }
+ /* fall through */
+ case 'S': /* Old style status, just signal only */
+ status->kind = TARGET_WAITKIND_STOPPED;
+ status->value.sig = (enum target_signal)
+ (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
+
+ if (buf[3] == 'p')
+ {
+ /* Export Cisco kernel mode as a convenience variable
+ (so that it can be used in the GDB prompt if desired). */
+
+ if (cisco_kernel_mode == 1)
+ set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
+ value_from_string ("PDEBUG-"));
+ cisco_kernel_mode = 0;
+ thread_num = strtol ((const char *) &buf[4], NULL, 16);
+ record_currthread (thread_num);
+ }
+ else if (buf[3] == 'k')
+ {
+ /* Export Cisco kernel mode as a convenience variable
+ (so that it can be used in the GDB prompt if desired). */
+
+ if (cisco_kernel_mode == 1)
+ set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
+ value_from_string ("KDEBUG-"));
+ cisco_kernel_mode = 1;
+ }
+ goto got_status;
+ case 'N': /* Cisco special: status and offsets */
+ {
+ bfd_vma text_addr, data_addr, bss_addr;
+ bfd_signed_vma text_off, data_off, bss_off;
+ unsigned char *p1;
+
+ status->kind = TARGET_WAITKIND_STOPPED;
+ status->value.sig = (enum target_signal)
+ (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
+
+ if (symfile_objfile == NULL)
+ {
+ warning ("Relocation packet received with no symbol file. \
+Packet Dropped");
+ goto got_status;
+ }
+
+ /* Relocate object file. Buffer format is NAATT;DD;BB
+ * where AA is the signal number, TT is the new text
+ * address, DD * is the new data address, and BB is the
+ * new bss address. */
+
+ p = &buf[3];
+ text_addr = strtoul (p, (char **) &p1, 16);
+ if (p1 == p || *p1 != ';')
+ warning ("Malformed relocation packet: Packet '%s'", buf);
+ p = p1 + 1;
+ data_addr = strtoul (p, (char **) &p1, 16);
+ if (p1 == p || *p1 != ';')
+ warning ("Malformed relocation packet: Packet '%s'", buf);
+ p = p1 + 1;
+ bss_addr = strtoul (p, (char **) &p1, 16);
+ if (p1 == p)
+ warning ("Malformed relocation packet: Packet '%s'", buf);
+
+ if (remote_cisco_section_offsets (text_addr, data_addr, bss_addr,
+ &text_off, &data_off, &bss_off)
+ == 0)
+ if (text_off != 0 || data_off != 0 || bss_off != 0)
+ remote_cisco_objfile_relocate (text_off, data_off, bss_off);
+
+ goto got_status;
+ }
+ case 'W': /* Target exited */
+ {
+ /* The remote process exited. */
+ status->kind = TARGET_WAITKIND_EXITED;
+ status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
+ goto got_status;
+ }
+ case 'X':
+ status->kind = TARGET_WAITKIND_SIGNALLED;
+ status->value.sig = (enum target_signal)
+ (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
+ kill_kludge = 1;
+
+ goto got_status;
+ case 'O': /* Console output */
+ remote_console_output (buf + 1);
+ continue;
+ case '\0':
+ if (last_sent_signal != TARGET_SIGNAL_0)
+ {
+ /* Zero length reply means that we tried 'S' or 'C' and
+ the remote system doesn't support it. */
+ target_terminal_ours_for_output ();
+ printf_filtered
+ ("Can't send signals to this remote system. %s not sent.\n",
+ target_signal_to_name (last_sent_signal));
+ last_sent_signal = TARGET_SIGNAL_0;
+ target_terminal_inferior ();
+
+ strcpy ((char *) buf, last_sent_step ? "s" : "c");
+ putpkt ((char *) buf);
+ continue;
+ }
+ /* else fallthrough */
+ default:
+ warning ("Invalid remote reply: %s", buf);
+ continue;
+ }
+ }
+got_status:
+ if (thread_num != -1)
+ {
+ return thread_num;
+ }
+ return inferior_pid;
+}
+
+/* Async version of remote_wait. */
+static int
+remote_async_wait (pid, status)
+ int pid;
+ struct target_waitstatus *status;
+{
+ unsigned char *buf = alloca (PBUFSIZ);
+ int thread_num = -1;
+
+ status->kind = TARGET_WAITKIND_EXITED;
+ status->value.integer = 0;
+
+ while (1)
+ {
+ unsigned char *p;
+
+ if (!async_p)
+ ofunc = signal (SIGINT, remote_interrupt);
+ getpkt ((char *) buf, 1);
+ if (!async_p)
+ signal (SIGINT, ofunc);
+
+ /* This is a hook for when we need to do something (perhaps the
+ collection of trace data) every time the target stops. */
+ if (target_wait_loop_hook)
+ (*target_wait_loop_hook) ();
+
+ switch (buf[0])
+ {
+ case 'E': /* Error of some sort */
+ warning ("Remote failure reply: %s", buf);
+ continue;
+ case 'T': /* Status with PC, SP, FP, ... */
+ {
+ int i;
+ long regno;
+ char regs[MAX_REGISTER_RAW_SIZE];
+
+ /* Expedited reply, containing Signal, {regno, reg} repeat */
+ /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
+ ss = signal number
+ n... = register number
+ r... = register contents
+ */
+ p = &buf[3]; /* after Txx */
+
+ while (*p)
+ {
+ unsigned char *p1;
+ char *p_temp;
+
+ /* Read the register number */
+ regno = strtol ((const char *) p, &p_temp, 16);
+ p1 = (unsigned char *) p_temp;
+
+ if (p1 == p) /* No register number present here */
+ {
+ p1 = (unsigned char *) strchr ((const char *) p, ':');
+ if (p1 == NULL)
+ warning ("Malformed packet(a) (missing colon): %s\n\
+Packet: '%s'\n",
+ p, buf);
+ if (strncmp ((const char *) p, "thread", p1 - p) == 0)
+ {
+ p_temp = unpack_varlen_hex (++p1, &thread_num);
+ record_currthread (thread_num);
+ p = (unsigned char *) p_temp;
+ }
+ }
+ else
+ {
+ p = p1;
+
+ if (*p++ != ':')
+ warning ("Malformed packet(b) (missing colon): %s\n\
+Packet: '%s'\n",
+ p, buf);
+
+ if (regno >= NUM_REGS)
+ warning ("Remote sent bad register number %ld: %s\n\
+Packet: '%s'\n",
+ regno, p, buf);
+
+ for (i = 0; i < REGISTER_RAW_SIZE (regno); i++)
+ {
+ if (p[0] == 0 || p[1] == 0)
+ warning ("Remote reply is too short: %s", buf);
+ regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
+ p += 2;
+ }
+ supply_register (regno, regs);
+ }
+
+ if (*p++ != ';')
+ {
+ warning ("Remote register badly formatted: %s", buf);
+ warning (" here: %s", p);
+ }
+ }
+ }
+ /* fall through */
+ case 'S': /* Old style status, just signal only */
+ status->kind = TARGET_WAITKIND_STOPPED;
+ status->value.sig = (enum target_signal)
+ (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
+
+ if (buf[3] == 'p')
+ {
+ /* Export Cisco kernel mode as a convenience variable
+ (so that it can be used in the GDB prompt if desired). */
+
+ if (cisco_kernel_mode == 1)
+ set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
+ value_from_string ("PDEBUG-"));
+ cisco_kernel_mode = 0;
+ thread_num = strtol ((const char *) &buf[4], NULL, 16);
+ record_currthread (thread_num);
+ }
+ else if (buf[3] == 'k')
+ {
+ /* Export Cisco kernel mode as a convenience variable
+ (so that it can be used in the GDB prompt if desired). */
+
+ if (cisco_kernel_mode == 1)
+ set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
+ value_from_string ("KDEBUG-"));
+ cisco_kernel_mode = 1;
+ }
+ goto got_status;
+ case 'N': /* Cisco special: status and offsets */
+ {
+ bfd_vma text_addr, data_addr, bss_addr;
+ bfd_signed_vma text_off, data_off, bss_off;
+ unsigned char *p1;
+
+ status->kind = TARGET_WAITKIND_STOPPED;
+ status->value.sig = (enum target_signal)
+ (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
+
+ if (symfile_objfile == NULL)
+ {
+ warning ("Relocation packet recieved with no symbol file. \
+Packet Dropped");
+ goto got_status;
+ }
+
+ /* Relocate object file. Buffer format is NAATT;DD;BB
+ * where AA is the signal number, TT is the new text
+ * address, DD * is the new data address, and BB is the
+ * new bss address. */
+
+ p = &buf[3];
+ text_addr = strtoul (p, (char **) &p1, 16);
+ if (p1 == p || *p1 != ';')
+ warning ("Malformed relocation packet: Packet '%s'", buf);
+ p = p1 + 1;
+ data_addr = strtoul (p, (char **) &p1, 16);
+ if (p1 == p || *p1 != ';')
+ warning ("Malformed relocation packet: Packet '%s'", buf);
+ p = p1 + 1;
+ bss_addr = strtoul (p, (char **) &p1, 16);
+ if (p1 == p)
+ warning ("Malformed relocation packet: Packet '%s'", buf);
+
+ if (remote_cisco_section_offsets (text_addr, data_addr, bss_addr,
+ &text_off, &data_off, &bss_off)
+ == 0)
+ if (text_off != 0 || data_off != 0 || bss_off != 0)
+ remote_cisco_objfile_relocate (text_off, data_off, bss_off);
+
+ goto got_status;
+ }
+ case 'W': /* Target exited */
+ {
+ /* The remote process exited. */
+ status->kind = TARGET_WAITKIND_EXITED;
+ status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
+ goto got_status;
+ }
+ case 'X':
+ status->kind = TARGET_WAITKIND_SIGNALLED;
+ status->value.sig = (enum target_signal)
+ (((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
+ kill_kludge = 1;
+
+ goto got_status;
+ case 'O': /* Console output */
+ remote_console_output (buf + 1);
+ continue;
+ case '\0':
+ if (last_sent_signal != TARGET_SIGNAL_0)
+ {
+ /* Zero length reply means that we tried 'S' or 'C' and
+ the remote system doesn't support it. */
+ target_terminal_ours_for_output ();
+ printf_filtered
+ ("Can't send signals to this remote system. %s not sent.\n",
+ target_signal_to_name (last_sent_signal));
+ last_sent_signal = TARGET_SIGNAL_0;
+ target_terminal_inferior ();
+
+ strcpy ((char *) buf, last_sent_step ? "s" : "c");
+ putpkt ((char *) buf);
+ continue;
+ }
+ /* else fallthrough */
+ default:
+ warning ("Invalid remote reply: %s", buf);
+ continue;
+ }
+ }
+got_status:
+ if (thread_num != -1)
+ {
+ return thread_num;
+ }
+ return inferior_pid;
+}
+
+/* Number of bytes of registers this stub implements. */
+
+static int register_bytes_found;
+
+/* Read the remote registers into the block REGS. */
+/* Currently we just read all the registers, so we don't use regno. */
+
+/* ARGSUSED */
+static void
+remote_fetch_registers (regno)
+ int regno;
+{
+ char *buf = alloca (PBUFSIZ);
+ int i;
+ char *p;
+ char regs[REGISTER_BYTES];
+
+ set_thread (inferior_pid, 1);
+
+ sprintf (buf, "g");
+ remote_send (buf);
+
+ if (remote_register_buf_size == 0)
+ remote_register_buf_size = strlen (buf);
+
+ /* Unimplemented registers read as all bits zero. */
+ memset (regs, 0, REGISTER_BYTES);
+
+ /* We can get out of synch in various cases. If the first character
+ in the buffer is not a hex character, assume that has happened
+ and try to fetch another packet to read. */
+ while ((buf[0] < '0' || buf[0] > '9')
+ && (buf[0] < 'a' || buf[0] > 'f')
+ && buf[0] != 'x') /* New: unavailable register value */
+ {
+ if (remote_debug)
+ fprintf_unfiltered (gdb_stdlog,
+ "Bad register packet; fetching a new packet\n");
+ getpkt (buf, 0);
+ }
+
+ /* Reply describes registers byte by byte, each byte encoded as two
+ hex characters. Suck them all up, then supply them to the
+ register cacheing/storage mechanism. */
+
+ p = buf;
+ for (i = 0; i < REGISTER_BYTES; i++)
+ {
+ if (p[0] == 0)
+ break;
+ if (p[1] == 0)
+ {
+ warning ("Remote reply is of odd length: %s", buf);
+ /* Don't change register_bytes_found in this case, and don't
+ print a second warning. */
+ goto supply_them;
+ }
+ if (p[0] == 'x' && p[1] == 'x')
+ regs[i] = 0; /* 'x' */
+ else
+ regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
+ p += 2;
+ }
+
+ if (i != register_bytes_found)
+ {
+ register_bytes_found = i;
+#ifdef REGISTER_BYTES_OK
+ if (!REGISTER_BYTES_OK (i))
+ warning ("Remote reply is too short: %s", buf);
+#endif
+ }
+
+supply_them:
+ for (i = 0; i < NUM_REGS; i++)
+ {
+ supply_register (i, ®s[REGISTER_BYTE (i)]);
+ if (buf[REGISTER_BYTE (i) * 2] == 'x')
+ register_valid[i] = -1; /* register value not available */
+ }
+}
+
+/* Prepare to store registers. Since we may send them all (using a
+ 'G' request), we have to read out the ones we don't want to change
+ first. */
+
+static void
+remote_prepare_to_store ()
+{
+ /* Make sure the entire registers array is valid. */
+ switch (remote_protocol_P.support)
+ {
+ case PACKET_DISABLE:
+ case PACKET_SUPPORT_UNKNOWN:
+ read_register_bytes (0, (char *) NULL, REGISTER_BYTES);
+ break;
+ case PACKET_ENABLE:
+ break;
+ }
+}
+
+/* Helper: Attempt to store REGNO using the P packet. Return fail IFF
+ packet was not recognized. */
+
+static int
+store_register_using_P (regno)
+ int regno;
+{
+ /* Try storing a single register. */
+ char *buf = alloca (PBUFSIZ);
+ char *regp;
+ char *p;
+ int i;
+
+ sprintf (buf, "P%x=", regno);
+ p = buf + strlen (buf);
+ regp = ®isters[REGISTER_BYTE (regno)];
+ for (i = 0; i < REGISTER_RAW_SIZE (regno); ++i)
+ {
+ *p++ = tohex ((regp[i] >> 4) & 0xf);
+ *p++ = tohex (regp[i] & 0xf);
+ }
+ *p = '\0';
+ remote_send (buf);
+
+ return buf[0] != '\0';
+}
+
+
+/* Store register REGNO, or all registers if REGNO == -1, from the contents
+ of REGISTERS. FIXME: ignores errors. */
+
+static void
+remote_store_registers (regno)
+ int regno;
+{
+ char *buf = alloca (PBUFSIZ);
+ int i;
+ char *p;
+
+ set_thread (inferior_pid, 1);
+
+ if (regno >= 0)
+ {
+ switch (remote_protocol_P.support)
+ {
+ case PACKET_DISABLE:
+ break;
+ case PACKET_ENABLE:
+ if (store_register_using_P (regno))
+ return;
+ else
+ error ("Protocol error: P packet not recognized by stub");
+ case PACKET_SUPPORT_UNKNOWN:
+ if (store_register_using_P (regno))
+ {
+ /* The stub recognized the 'P' packet. Remember this. */
+ remote_protocol_P.support = PACKET_ENABLE;
+ return;
+ }
+ else
+ {
+ /* The stub does not support the 'P' packet. Use 'G'
+ instead, and don't try using 'P' in the future (it
+ will just waste our time). */
+ remote_protocol_P.support = PACKET_DISABLE;
+ break;
+ }
+ }
+ }
+
+ buf[0] = 'G';
+
+ /* Command describes registers byte by byte,
+ each byte encoded as two hex characters. */
+
+ p = buf + 1;
+ /* remote_prepare_to_store insures that register_bytes_found gets set. */
+ for (i = 0; i < register_bytes_found; i++)
+ {
+ *p++ = tohex ((registers[i] >> 4) & 0xf);
+ *p++ = tohex (registers[i] & 0xf);
+ }
+ *p = '\0';
+
+ remote_send (buf);
+}
+
+/* Use of the data cache *used* to be disabled because it loses for looking
+ at and changing hardware I/O ports and the like. Accepting `volatile'
+ would perhaps be one way to fix it. Another idea would be to use the
+ executable file for the text segment (for all SEC_CODE sections?
+ For all SEC_READONLY sections?). This has problems if you want to
+ actually see what the memory contains (e.g. self-modifying code,
+ clobbered memory, user downloaded the wrong thing).
+
+ Because it speeds so much up, it's now enabled, if you're playing
+ with registers you turn it of (set remotecache 0). */
+
+/* Read a word from remote address ADDR and return it.
+ This goes through the data cache. */
+
+#if 0 /* unused? */
+static int
+remote_fetch_word (addr)
+ CORE_ADDR addr;
+{
+ return dcache_fetch (remote_dcache, addr);
+}
+
+/* Write a word WORD into remote address ADDR.
+ This goes through the data cache. */
+
+static void
+remote_store_word (addr, word)
+ CORE_ADDR addr;
+ int word;
+{
+ dcache_poke (remote_dcache, addr, word);
+}
+#endif /* 0 (unused?) */
+\f
+
+
+/* Return the number of hex digits in num. */
+
+static int
+hexnumlen (num)
+ ULONGEST num;
+{
+ int i;
+
+ for (i = 0; num != 0; i++)
+ num >>= 4;
+
+ return max (i, 1);
+}
+
+/* Set BUF to the hex digits representing NUM. */
+
+static int
+hexnumstr (buf, num)
+ char *buf;
+ ULONGEST num;
+{
+ int i;
+ int len = hexnumlen (num);
+
+ buf[len] = '\0';
+
+ for (i = len - 1; i >= 0; i--)
+ {
+ buf[i] = "0123456789abcdef"[(num & 0xf)];
+ num >>= 4;
+ }
+
+ return len;
+}
+
+/* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
+
+static CORE_ADDR
+remote_address_masked (addr)
+ CORE_ADDR addr;
+{
+ if (remote_address_size > 0
+ && remote_address_size < (sizeof (ULONGEST) * 8))
+ {
+ /* Only create a mask when that mask can safely be constructed
+ in a ULONGEST variable. */
+ ULONGEST mask = 1;
+ mask = (mask << remote_address_size) - 1;
+ addr &= mask;
+ }
+ return addr;
+}
+
+/* Determine whether the remote target supports binary downloading.
+ This is accomplished by sending a no-op memory write of zero length
+ to the target at the specified address. It does not suffice to send
+ the whole packet, since many stubs strip the eighth bit and subsequently
+ compute a wrong checksum, which causes real havoc with remote_write_bytes.
+
+ NOTE: This can still lose if the serial line is not eight-bit
+ clean. In cases like this, the user should clear "remote
+ X-packet". */
+
+static void
+check_binary_download (addr)
+ CORE_ADDR addr;
+{
+ switch (remote_protocol_binary_download.support)
+ {
+ case PACKET_DISABLE:
+ break;
+ case PACKET_ENABLE:
+ break;
+ case PACKET_SUPPORT_UNKNOWN:
+ {
+ char *buf = alloca (PBUFSIZ);
+ char *p;
+
+ p = buf;
+ *p++ = 'X';
+ p += hexnumstr (p, (ULONGEST) addr);
+ *p++ = ',';
+ p += hexnumstr (p, (ULONGEST) 0);
+ *p++ = ':';
+ *p = '\0';
+
+ putpkt_binary (buf, (int) (p - buf));
+ getpkt (buf, 0);
+
+ if (buf[0] == '\0')
+ {
+ if (remote_debug)
+ fprintf_unfiltered (gdb_stdlog,
+ "binary downloading NOT suppported by target\n");
+ remote_protocol_binary_download.support = PACKET_DISABLE;
+ }
+ else
+ {
+ if (remote_debug)
+ fprintf_unfiltered (gdb_stdlog,
+ "binary downloading suppported by target\n");
+ remote_protocol_binary_download.support = PACKET_ENABLE;
+ }
+ break;
+ }
+ }
+}
+
+/* Write memory data directly to the remote machine.
+ This does not inform the data cache; the data cache uses this.
+ MEMADDR is the address in the remote memory space.
+ MYADDR is the address of the buffer in our space.
+ LEN is the number of bytes.
+
+ Returns number of bytes transferred, or 0 for error. */
+
+static int
+remote_write_bytes (memaddr, myaddr, len)
+ CORE_ADDR memaddr;
+ char *myaddr;
+ int len;
+{
+ unsigned char *buf = alloca (PBUFSIZ);
+ int max_buf_size; /* Max size of packet output buffer */
+ int origlen;
+
+ /* Verify that the target can support a binary download */
+ check_binary_download (memaddr);
+
+ /* Chop the transfer down if necessary */
+
+ max_buf_size = min (remote_write_size, PBUFSIZ);
+ if (remote_register_buf_size != 0)
+ max_buf_size = min (max_buf_size, remote_register_buf_size);
+
+ /* Subtract header overhead from max payload size - $M<memaddr>,<len>:#nn */
+ max_buf_size -= 2 + hexnumlen (memaddr + len - 1) + 1 + hexnumlen (len) + 4;
+
+ origlen = len;
+ while (len > 0)
+ {
+ unsigned char *p, *plen;
+ int todo;
+ int i;
+
+ /* construct "M"<memaddr>","<len>":" */
+ /* sprintf (buf, "M%lx,%x:", (unsigned long) memaddr, todo); */
+ memaddr = remote_address_masked (memaddr);
+ p = buf;
+ switch (remote_protocol_binary_download.support)
+ {
+ case PACKET_ENABLE:
+ *p++ = 'X';
+ todo = min (len, max_buf_size);
+ break;
+ case PACKET_DISABLE:
+ *p++ = 'M';
+ todo = min (len, max_buf_size / 2); /* num bytes that will fit */
+ break;
+ case PACKET_SUPPORT_UNKNOWN:
+ internal_error ("remote_write_bytes: bad switch");
+ }
+
+ p += hexnumstr (p, (ULONGEST) memaddr);
+ *p++ = ',';
+
+ plen = p; /* remember where len field goes */
+ p += hexnumstr (p, (ULONGEST) todo);
+ *p++ = ':';
+ *p = '\0';
+
+ /* We send target system values byte by byte, in increasing byte
+ addresses, each byte encoded as two hex characters (or one
+ binary character). */
+ switch (remote_protocol_binary_download.support)
+ {
+ case PACKET_ENABLE:
+ {
+ int escaped = 0;
+ for (i = 0;
+ (i < todo) && (i + escaped) < (max_buf_size - 2);
+ i++)
+ {
+ switch (myaddr[i] & 0xff)
+ {
+ case '$':
+ case '#':
+ case 0x7d:
+ /* These must be escaped */
+ escaped++;
+ *p++ = 0x7d;
+ *p++ = (myaddr[i] & 0xff) ^ 0x20;
+ break;
+ default:
+ *p++ = myaddr[i] & 0xff;
+ break;
+ }
+ }
+
+ if (i < todo)
+ {
+ /* Escape chars have filled up the buffer prematurely,
+ and we have actually sent fewer bytes than planned.
+ Fix-up the length field of the packet. */
+
+ /* FIXME: will fail if new len is a shorter string than
+ old len. */
+
+ plen += hexnumstr (plen, (ULONGEST) i);
+ *plen++ = ':';
+ }
+ break;
+ }
+ case PACKET_DISABLE:
+ {
+ for (i = 0; i < todo; i++)
+ {
+ *p++ = tohex ((myaddr[i] >> 4) & 0xf);
+ *p++ = tohex (myaddr[i] & 0xf);
+ }
+ *p = '\0';
+ break;
+ }
+ case PACKET_SUPPORT_UNKNOWN:
+ internal_error ("remote_write_bytes: bad switch");
+ }
+
+ putpkt_binary (buf, (int) (p - buf));
+ getpkt (buf, 0);
+
+ if (buf[0] == 'E')
+ {
+ /* There is no correspondance between what the remote protocol uses
+ for errors and errno codes. We would like a cleaner way of
+ representing errors (big enough to include errno codes, bfd_error
+ codes, and others). But for now just return EIO. */
+ errno = EIO;
+ return 0;
+ }
+
+ /* Increment by i, not by todo, in case escape chars
+ caused us to send fewer bytes than we'd planned. */
+ myaddr += i;
+ memaddr += i;
+ len -= i;
+ }
+ return origlen;
+}
+
+/* Read memory data directly from the remote machine.
+ This does not use the data cache; the data cache uses this.
+ MEMADDR is the address in the remote memory space.
+ MYADDR is the address of the buffer in our space.
+ LEN is the number of bytes.
+
+ Returns number of bytes transferred, or 0 for error. */
+
+static int
+remote_read_bytes (memaddr, myaddr, len)
+ CORE_ADDR memaddr;
+ char *myaddr;
+ int len;
+{
+ char *buf = alloca (PBUFSIZ);
+ int max_buf_size; /* Max size of packet output buffer */
+ int origlen;
+
+ /* Chop the transfer down if necessary */
+
+ max_buf_size = min (remote_write_size, PBUFSIZ);
+ if (remote_register_buf_size != 0)
+ max_buf_size = min (max_buf_size, remote_register_buf_size);
+
+ origlen = len;
+ while (len > 0)
+ {
+ char *p;
+ int todo;
+ int i;
+
+ todo = min (len, max_buf_size / 2); /* num bytes that will fit */
+
+ /* construct "m"<memaddr>","<len>" */
+ /* sprintf (buf, "m%lx,%x", (unsigned long) memaddr, todo); */
+ memaddr = remote_address_masked (memaddr);
+ p = buf;
+ *p++ = 'm';
+ p += hexnumstr (p, (ULONGEST) memaddr);
+ *p++ = ',';
+ p += hexnumstr (p, (ULONGEST) todo);
+ *p = '\0';
+
+ putpkt (buf);
+ getpkt (buf, 0);
+
+ if (buf[0] == 'E')
+ {
+ /* There is no correspondance between what the remote protocol uses
+ for errors and errno codes. We would like a cleaner way of
+ representing errors (big enough to include errno codes, bfd_error
+ codes, and others). But for now just return EIO. */
+ errno = EIO;
+ return 0;
+ }
+
+ /* Reply describes memory byte by byte,
+ each byte encoded as two hex characters. */
+
+ p = buf;
+ for (i = 0; i < todo; i++)
+ {
+ if (p[0] == 0 || p[1] == 0)
+ /* Reply is short. This means that we were able to read
+ only part of what we wanted to. */
+ return i + (origlen - len);
+ myaddr[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
+ p += 2;
+ }
+ myaddr += todo;
+ memaddr += todo;
+ len -= todo;
+ }
+ return origlen;
+}
+\f
+/* Read or write LEN bytes from inferior memory at MEMADDR,
+ transferring to or from debugger address BUFFER. Write to inferior if
+ SHOULD_WRITE is nonzero. Returns length of data written or read; 0
+ for error. */
+
+#ifndef REMOTE_TRANSLATE_XFER_ADDRESS
+#define REMOTE_TRANSLATE_XFER_ADDRESS(MEM_ADDR, MEM_LEN, TARG_ADDR, TARG_LEN) \
+ (*(TARG_ADDR) = (MEM_ADDR), *(TARG_LEN) = (MEM_LEN))
+#endif
+
+/* ARGSUSED */
+static int
+remote_xfer_memory (mem_addr, buffer, mem_len, should_write, target)
+ CORE_ADDR mem_addr;
+ char *buffer;
+ int mem_len;
+ int should_write;
+ struct target_ops *target; /* ignored */
+{
+ CORE_ADDR targ_addr;
+ int targ_len;
+ REMOTE_TRANSLATE_XFER_ADDRESS (mem_addr, mem_len, &targ_addr, &targ_len);
+ if (targ_len <= 0)
+ return 0;
+
+ return dcache_xfer_memory (remote_dcache, targ_addr, buffer,
+ targ_len, should_write);
+}
+
+
+#if 0
+/* Enable after 4.12. */
+
+void
+remote_search (len, data, mask, startaddr, increment, lorange, hirange
+ addr_found, data_found)
+ int len;
+ char *data;
+ char *mask;
+ CORE_ADDR startaddr;
+ int increment;
+ CORE_ADDR lorange;
+ CORE_ADDR hirange;
+ CORE_ADDR *addr_found;
+ char *data_found;
+{
+ if (increment == -4 && len == 4)
+ {
+ long mask_long, data_long;
+ long data_found_long;
+ CORE_ADDR addr_we_found;
+ char *buf = alloca (PBUFSIZ);
+ long returned_long[2];
+ char *p;
+
+ mask_long = extract_unsigned_integer (mask, len);
+ data_long = extract_unsigned_integer (data, len);
+ sprintf (buf, "t%x:%x,%x", startaddr, data_long, mask_long);
+ putpkt (buf);
+ getpkt (buf, 0);
+ if (buf[0] == '\0')
+ {
+ /* The stub doesn't support the 't' request. We might want to
+ remember this fact, but on the other hand the stub could be
+ switched on us. Maybe we should remember it only until
+ the next "target remote". */
+ generic_search (len, data, mask, startaddr, increment, lorange,
+ hirange, addr_found, data_found);
+ return;
+ }
+
+ if (buf[0] == 'E')
+ /* There is no correspondance between what the remote protocol uses
+ for errors and errno codes. We would like a cleaner way of
+ representing errors (big enough to include errno codes, bfd_error
+ codes, and others). But for now just use EIO. */
+ memory_error (EIO, startaddr);
+ p = buf;
+ addr_we_found = 0;
+ while (*p != '\0' && *p != ',')
+ addr_we_found = (addr_we_found << 4) + fromhex (*p++);
+ if (*p == '\0')
+ error ("Protocol error: short return for search");
+
+ data_found_long = 0;
+ while (*p != '\0' && *p != ',')
+ data_found_long = (data_found_long << 4) + fromhex (*p++);
+ /* Ignore anything after this comma, for future extensions. */
+
+ if (addr_we_found < lorange || addr_we_found >= hirange)
+ {
+ *addr_found = 0;
+ return;
+ }
+
+ *addr_found = addr_we_found;
+ *data_found = store_unsigned_integer (data_we_found, len);
+ return;
+ }
+ generic_search (len, data, mask, startaddr, increment, lorange,
+ hirange, addr_found, data_found);
+}
+#endif /* 0 */
+\f
+static void
+remote_files_info (ignore)
+ struct target_ops *ignore;
+{
+ puts_filtered ("Debugging a target over a serial line.\n");
+}
+\f
+/* Stuff for dealing with the packets which are part of this protocol.
+ See comment at top of file for details. */
+
+/* Read a single character from the remote end, masking it down to 7 bits. */
+
+static int
+readchar (timeout)
+ int timeout;
+{
+ int ch;
+
+ ch = SERIAL_READCHAR (remote_desc, timeout);
+
+ switch (ch)
+ {
+ case SERIAL_EOF:
+ error ("Remote connection closed");
+ case SERIAL_ERROR:
+ perror_with_name ("Remote communication error");
+ case SERIAL_TIMEOUT:
+ return ch;
+ default:
+ return ch & 0x7f;
+ }
+}
+
+/* Send the command in BUF to the remote machine, and read the reply
+ into BUF. Report an error if we get an error reply. */
+
+static void
+remote_send (buf)
+ char *buf;
+{
+ putpkt (buf);
+ getpkt (buf, 0);
+
+ if (buf[0] == 'E')
+ error ("Remote failure reply: %s", buf);
+}
+
+/* Display a null-terminated packet on stdout, for debugging, using C
+ string notation. */
+
+static void
+print_packet (buf)
+ char *buf;
+{
+ puts_filtered ("\"");
+ fputstr_filtered (buf, '"', gdb_stdout);
+ puts_filtered ("\"");
+}
+
+int
+putpkt (buf)
+ char *buf;
+{
+ return putpkt_binary (buf, strlen (buf));
+}
+
+/* Send a packet to the remote machine, with error checking. The data
+ of the packet is in BUF. The string in BUF can be at most PBUFSIZ - 5
+ to account for the $, # and checksum, and for a possible /0 if we are
+ debugging (remote_debug) and want to print the sent packet as a string */
+
+static int
+putpkt_binary (buf, cnt)
+ char *buf;
+ int cnt;
+{
+ int i;
+ unsigned char csum = 0;
+ char *buf2 = alloca (PBUFSIZ);
+ char *junkbuf = alloca (PBUFSIZ);
+
+ int ch;
+ int tcount = 0;
+ char *p;
+
+ /* Copy the packet into buffer BUF2, encapsulating it
+ and giving it a checksum. */
+
+ if (cnt > BUFSIZ - 5) /* Prosanity check */
+ abort ();
+
+ p = buf2;
+ *p++ = '$';
+
+ for (i = 0; i < cnt; i++)
+ {
+ csum += buf[i];
+ *p++ = buf[i];
+ }
+ *p++ = '#';
+ *p++ = tohex ((csum >> 4) & 0xf);
+ *p++ = tohex (csum & 0xf);
+
+ /* Send it over and over until we get a positive ack. */
+
+ while (1)
+ {
+ int started_error_output = 0;
+
+ if (remote_debug)
+ {
+ *p = '\0';
+ fprintf_unfiltered (gdb_stdlog, "Sending packet: ");
+ fputstrn_unfiltered (buf2, p - buf2, 0, gdb_stdlog);
+ fprintf_unfiltered (gdb_stdlog, "...");
+ gdb_flush (gdb_stdlog);
+ }
+ if (SERIAL_WRITE (remote_desc, buf2, p - buf2))
+ perror_with_name ("putpkt: write failed");
+
+ /* read until either a timeout occurs (-2) or '+' is read */
+ while (1)
+ {
+ ch = readchar (remote_timeout);
+
+ if (remote_debug)
+ {
+ switch (ch)
+ {
+ case '+':
+ case SERIAL_TIMEOUT:
+ case '$':
+ if (started_error_output)
+ {
+ putchar_unfiltered ('\n');
+ started_error_output = 0;
+ }
+ }
+ }
+
+ switch (ch)
+ {
+ case '+':
+ if (remote_debug)
+ fprintf_unfiltered (gdb_stdlog, "Ack\n");
+ return 1;
+ case SERIAL_TIMEOUT:
+ tcount++;
+ if (tcount > 3)
+ return 0;
+ break; /* Retransmit buffer */
+ case '$':
+ {
+ /* It's probably an old response, and we're out of sync.
+ Just gobble up the packet and ignore it. */
+ getpkt (junkbuf, 0);
+ continue; /* Now, go look for + */
+ }
+ default:
+ if (remote_debug)
+ {
+ if (!started_error_output)
+ {
+ started_error_output = 1;
+ fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
+ }
+ fputc_unfiltered (ch & 0177, gdb_stdlog);
+ }
+ continue;
+ }
+ break; /* Here to retransmit */
+ }
+
+#if 0
+ /* This is wrong. If doing a long backtrace, the user should be
+ able to get out next time we call QUIT, without anything as
+ violent as interrupt_query. If we want to provide a way out of
+ here without getting to the next QUIT, it should be based on
+ hitting ^C twice as in remote_wait. */
+ if (quit_flag)
+ {
+ quit_flag = 0;
+ interrupt_query ();
+ }
+#endif
+ }
+}
+
+static int remote_cisco_mode;
+
+static void
+remote_cisco_expand (src, dest)
+ char *src;
+ char *dest;
+{
+ int i;
+ int repeat;
+
+ do
+ {
+ if (*src == '*')
+ {
+ repeat = (fromhex (src[1]) << 4) + fromhex (src[2]);
+ for (i = 0; i < repeat; i++)
+ {
+ *dest++ = *(src - 1);
+ }
+ src += 2;
+ }
+ else
+ {
+ *dest++ = *src;
+ }
+ }
+ while (*src++);
+}
+
+/* Come here after finding the start of the frame. Collect the rest
+ into BUF, verifying the checksum, length, and handling run-length
+ compression. Returns 0 on any error, 1 on success. */
+
+static int
+read_frame (buf)
+ char *buf;
+{
+ unsigned char csum;
+ char *bp;
+ int c;
+
+ csum = 0;
+ bp = buf;
+
+ while (1)
+ {
+ c = readchar (remote_timeout);
+
+ switch (c)
+ {
+ case SERIAL_TIMEOUT:
+ if (remote_debug)
+ fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
+ return 0;
+ case '$':
+ if (remote_debug)
+ fputs_filtered ("Saw new packet start in middle of old one\n",
+ gdb_stdlog);
+ return 0; /* Start a new packet, count retries */
+ case '#':
+ {
+ unsigned char pktcsum;
+
+ *bp = '\000';
+
+ pktcsum = fromhex (readchar (remote_timeout)) << 4;
+ pktcsum |= fromhex (readchar (remote_timeout));
+
+ if (csum == pktcsum)
+ {
+ if (remote_cisco_mode) /* variant run-length-encoding */
+ {
+ char *tmp_buf = alloca (PBUFSIZ);
+
+ remote_cisco_expand (buf, tmp_buf);
+ strcpy (buf, tmp_buf);
+ }
+ return 1;
+ }
+
+ if (remote_debug)
+ {
+ fprintf_filtered (gdb_stdlog,
+ "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
+ pktcsum, csum);
+ fputs_filtered (buf, gdb_stdlog);
+ fputs_filtered ("\n", gdb_stdlog);
+ }
+ return 0;
+ }
+ case '*': /* Run length encoding */
+ if (remote_cisco_mode == 0) /* variant run-length-encoding */
+ {
+ csum += c;
+ c = readchar (remote_timeout);
+ csum += c;
+ c = c - ' ' + 3; /* Compute repeat count */
+
+ if (c > 0 && c < 255 && bp + c - 1 < buf + PBUFSIZ - 1)
+ {
+ memset (bp, *(bp - 1), c);
+ bp += c;
+ continue;
+ }
+
+ *bp = '\0';
+ printf_filtered ("Repeat count %d too large for buffer: ", c);
+ puts_filtered (buf);
+ puts_filtered ("\n");
+ return 0;
+ }
+ /* else fall thru to treat like default */
+ default:
+ if (bp < buf + PBUFSIZ - 1)
+ {
+ *bp++ = c;
+ csum += c;
+ continue;
+ }
+
+ *bp = '\0';
+ puts_filtered ("Remote packet too long: ");
+ puts_filtered (buf);
+ puts_filtered ("\n");
+
+ return 0;
+ }
+ }
+}
+
+/* Read a packet from the remote machine, with error checking, and
+ store it in BUF. BUF is expected to be of size PBUFSIZ. If
+ FOREVER, wait forever rather than timing out; this is used while
+ the target is executing user code. */
+
+void
+getpkt (buf, forever)
+ char *buf;
+ int forever;
+{
+ int c;
+ int tries;
+ int timeout;
+ int val;
+
+ strcpy (buf, "timeout");
+
+ if (forever)
+ {
+ timeout = watchdog > 0 ? watchdog : -1;
+ }
+
+ else
+ timeout = remote_timeout;
+
+#define MAX_TRIES 3
+
+ for (tries = 1; tries <= MAX_TRIES; tries++)
+ {
+ /* This can loop forever if the remote side sends us characters
+ continuously, but if it pauses, we'll get a zero from readchar
+ because of timeout. Then we'll count that as a retry. */
+
+ /* Note that we will only wait forever prior to the start of a packet.
+ After that, we expect characters to arrive at a brisk pace. They
+ should show up within remote_timeout intervals. */
+
+ do
+ {
+ c = readchar (timeout);
+
+ if (c == SERIAL_TIMEOUT)
+ {
+ if (forever) /* Watchdog went off. Kill the target. */
+ {
+ target_mourn_inferior ();
+ error ("Watchdog has expired. Target detached.\n");
+ }
+ if (remote_debug)
+ fputs_filtered ("Timed out.\n", gdb_stdlog);
+ goto retry;
+ }
+ }
+ while (c != '$');
+
+ /* We've found the start of a packet, now collect the data. */
+
+ val = read_frame (buf);
+
+ if (val == 1)
+ {
+ if (remote_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "Packet received: ");
+ fputstr_unfiltered (buf, 0, gdb_stdlog);
+ fprintf_unfiltered (gdb_stdlog, "\n");
+ }
+ SERIAL_WRITE (remote_desc, "+", 1);
+ return;
+ }
+
+ /* Try the whole thing again. */
+ retry:
+ SERIAL_WRITE (remote_desc, "-", 1);
+ }
+
+ /* We have tried hard enough, and just can't receive the packet. Give up. */
+
+ printf_unfiltered ("Ignoring packet error, continuing...\n");
+ SERIAL_WRITE (remote_desc, "+", 1);
+}
+\f
+static void
+remote_kill ()
+{
+ /* For some mysterious reason, wait_for_inferior calls kill instead of
+ mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
+ if (kill_kludge)
+ {
+ kill_kludge = 0;
+ target_mourn_inferior ();
+ return;
+ }
+
+ /* Use catch_errors so the user can quit from gdb even when we aren't on
+ speaking terms with the remote system. */
+ catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
+
+ /* Don't wait for it to die. I'm not really sure it matters whether
+ we do or not. For the existing stubs, kill is a noop. */
+ target_mourn_inferior ();
+}
+
+/* Async version of remote_kill. */
+static void
+remote_async_kill ()
+{
+ /* Unregister the file descriptor from the event loop. */
+ if (async_p)
+ delete_file_handler (remote_desc->fd);
+
+ /* For some mysterious reason, wait_for_inferior calls kill instead of
+ mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
+ if (kill_kludge)
+ {
+ kill_kludge = 0;
+ target_mourn_inferior ();
+ return;
+ }
+
+ /* Use catch_errors so the user can quit from gdb even when we aren't on
+ speaking terms with the remote system. */
+ catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
+
+ /* Don't wait for it to die. I'm not really sure it matters whether
+ we do or not. For the existing stubs, kill is a noop. */
+ target_mourn_inferior ();
+}
+
+static void
+remote_mourn ()
+{
+ remote_mourn_1 (&remote_ops);
+}
+
+static void
+remote_async_mourn ()
+{
+ remote_mourn_1 (&remote_async_ops);
+}
+
+static void
+extended_remote_mourn ()
+{
+ /* We do _not_ want to mourn the target like this; this will
+ remove the extended remote target from the target stack,
+ and the next time the user says "run" it'll fail.
+
+ FIXME: What is the right thing to do here? */
+#if 0
+ remote_mourn_1 (&extended_remote_ops);
+#endif
+}
+
+/* Worker function for remote_mourn. */
+static void
+remote_mourn_1 (target)
+ struct target_ops *target;
+{
+ unpush_target (target);
+ generic_mourn_inferior ();
+}
+
+/* In the extended protocol we want to be able to do things like
+ "run" and have them basically work as expected. So we need
+ a special create_inferior function.
+
+ FIXME: One day add support for changing the exec file
+ we're debugging, arguments and an environment. */
+
+static void
+extended_remote_create_inferior (exec_file, args, env)
+ char *exec_file;
+ char *args;
+ char **env;
+{
+ /* Rip out the breakpoints; we'll reinsert them after restarting
+ the remote server. */
+ remove_breakpoints ();
+
+ /* Now restart the remote server. */
+ extended_remote_restart ();
+
+ /* Now put the breakpoints back in. This way we're safe if the
+ restart function works via a unix fork on the remote side. */
+ insert_breakpoints ();
+
+ /* Clean up from the last time we were running. */
+ clear_proceed_status ();
+
+ /* Let the remote process run. */
+ proceed (-1, TARGET_SIGNAL_0, 0);
+}
+
+/* Async version of extended_remote_create_inferior. */
+static void
+extended_remote_async_create_inferior (exec_file, args, env)
+ char *exec_file;
+ char *args;
+ char **env;
+{
+ /* Rip out the breakpoints; we'll reinsert them after restarting
+ the remote server. */
+ remove_breakpoints ();
+
+ /* If running asynchronously, register the target file descriptor
+ with the event loop. */
+ if (async_p)
+ add_file_handler (remote_desc->fd, fetch_inferior_event, 0);
+
+ /* Now restart the remote server. */
+ extended_remote_restart ();
+
+ /* Now put the breakpoints back in. This way we're safe if the
+ restart function works via a unix fork on the remote side. */
+ insert_breakpoints ();
+
+ /* Clean up from the last time we were running. */
+ clear_proceed_status ();
+
+ /* Let the remote process run. */
+ proceed (-1, TARGET_SIGNAL_0, 0);
+}
+\f
+
+/* On some machines, e.g. 68k, we may use a different breakpoint instruction
+ than other targets; in those use REMOTE_BREAKPOINT instead of just
+ BREAKPOINT. Also, bi-endian targets may define LITTLE_REMOTE_BREAKPOINT
+ and BIG_REMOTE_BREAKPOINT. If none of these are defined, we just call
+ the standard routines that are in mem-break.c. */
+
+/* FIXME, these ought to be done in a more dynamic fashion. For instance,
+ the choice of breakpoint instruction affects target program design and
+ vice versa, and by making it user-tweakable, the special code here
+ goes away and we need fewer special GDB configurations. */
+
+#if defined (LITTLE_REMOTE_BREAKPOINT) && defined (BIG_REMOTE_BREAKPOINT) && !defined(REMOTE_BREAKPOINT)
+#define REMOTE_BREAKPOINT
+#endif
+
+#ifdef REMOTE_BREAKPOINT
+
+/* If the target isn't bi-endian, just pretend it is. */
+#if !defined (LITTLE_REMOTE_BREAKPOINT) && !defined (BIG_REMOTE_BREAKPOINT)
+#define LITTLE_REMOTE_BREAKPOINT REMOTE_BREAKPOINT
+#define BIG_REMOTE_BREAKPOINT REMOTE_BREAKPOINT
+#endif
+
+static unsigned char big_break_insn[] = BIG_REMOTE_BREAKPOINT;
+static unsigned char little_break_insn[] = LITTLE_REMOTE_BREAKPOINT;
+
+#endif /* REMOTE_BREAKPOINT */
+
+/* Insert a breakpoint on targets that don't have any better breakpoint
+ support. We read the contents of the target location and stash it,
+ then overwrite it with a breakpoint instruction. ADDR is the target
+ location in the target machine. CONTENTS_CACHE is a pointer to
+ memory allocated for saving the target contents. It is guaranteed
+ by the caller to be long enough to save sizeof BREAKPOINT bytes (this
+ is accomplished via BREAKPOINT_MAX). */
+
+static int
+remote_insert_breakpoint (addr, contents_cache)
+ CORE_ADDR addr;
+ char *contents_cache;
+{
+#ifdef REMOTE_BREAKPOINT
+ int val;
+#endif
+ int bp_size;
+
+ /* Try the "Z" packet if it is not already disabled.
+ If it succeeds, then set the support to PACKET_ENABLE.
+ If it fails, and the user has explicitly requested the Z support
+ then report an error, otherwise, mark it disabled and go on. */
+
+ if ((remote_protocol_Z.support == PACKET_ENABLE)
+ || (remote_protocol_Z.support == PACKET_SUPPORT_UNKNOWN))
+ {
+ char buf[PBUFSIZ], *p = buf;
+
+ addr = remote_address_masked (addr);
+ *(p++) = 'Z';
+ *(p++) = '0';
+ *(p++) = ',';
+ p += hexnumstr (p, (ULONGEST) addr);
+ BREAKPOINT_FROM_PC (&addr, &bp_size);
+ sprintf (p, ",%d", bp_size);
+
+ putpkt (buf);
+ getpkt (buf, 0);
+
+ if (buf[0] != '\0')
+ {
+ remote_protocol_Z.support = PACKET_ENABLE;
+ return (buf[0] == 'E');
}
+
+ /* The stub does not support the 'Z' request. If the user has
+ explicitly requested the Z support, or if the stub previously
+ said it supported the packet, this is an error,
+ otherwise, mark it disabled. */
+
+ else if (remote_protocol_Z.support == PACKET_ENABLE)
+ {
+ error ("Protocol error: Z packet not recognized by stub");
+ }
+ else
+ {
+ remote_protocol_Z.support = PACKET_DISABLE;
+ }
+ }
+
+#ifdef REMOTE_BREAKPOINT
+ val = target_read_memory (addr, contents_cache, sizeof big_break_insn);
+
+ if (val == 0)
+ {
+ if (TARGET_BYTE_ORDER == BIG_ENDIAN)
+ val = target_write_memory (addr, (char *) big_break_insn,
+ sizeof big_break_insn);
+ else
+ val = target_write_memory (addr, (char *) little_break_insn,
+ sizeof little_break_insn);
+ }
+
+ return val;
+#else
+ return memory_insert_breakpoint (addr, contents_cache);
+#endif /* REMOTE_BREAKPOINT */
+}
+
+static int
+remote_remove_breakpoint (addr, contents_cache)
+ CORE_ADDR addr;
+ char *contents_cache;
+{
+ int bp_size;
+
+ if ((remote_protocol_Z.support == PACKET_ENABLE)
+ || (remote_protocol_Z.support == PACKET_SUPPORT_UNKNOWN))
+ {
+ char buf[PBUFSIZ], *p = buf;
+
+ *(p++) = 'z';
+ *(p++) = '0';
+ *(p++) = ',';
+
+ addr = remote_address_masked (addr);
+ p += hexnumstr (p, (ULONGEST) addr);
+ BREAKPOINT_FROM_PC (&addr, &bp_size);
+ sprintf (p, ",%d", bp_size);
+
+ putpkt (buf);
+ getpkt (buf, 0);
+
+ return (buf[0] == 'E');
}
- else if (buf[0] != 'S')
- error ("Invalid remote reply: %s", buf);
- WSETSTOP ((*status), (((fromhex (buf[1])) << 4) + (fromhex (buf[2]))));
+#ifdef REMOTE_BREAKPOINT
+ return target_write_memory (addr, contents_cache, sizeof big_break_insn);
+#else
+ return memory_remove_breakpoint (addr, contents_cache);
+#endif /* REMOTE_BREAKPOINT */
+}
+
+#ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
+int
+remote_insert_watchpoint (addr, len, type)
+ CORE_ADDR addr;
+ int len;
+ int type;
+{
+ char buf[PBUFSIZ], *p;
+
+ if (remote_protocol_Z.support == PACKET_DISABLE)
+ error ("Can't set hardware watchpoints without the 'Z' packet\n");
+
+ sprintf (buf, "Z%x,", type + 2 );
+ p = strchr (buf, '\0');
+ addr = remote_address_masked (addr);
+ p += hexnumstr (p, (ULONGEST) addr);
+ sprintf (p, ",%x", len);
+
+ putpkt (buf);
+ getpkt (buf, 0);
+
+ if (buf[0] == '\0' || buf [0] == 'E')
+ return -1;
+
+ return 0;
+}
+
+int
+remote_remove_watchpoint (addr, len, type)
+ CORE_ADDR addr;
+ int len;
+ int type;
+{
+ char buf[PBUFSIZ], *p;
+
+ sprintf (buf, "z%x,", type + 2 );
+ p = strchr (buf, '\0');
+ addr = remote_address_masked (addr);
+ p += hexnumstr (p, (ULONGEST) addr);
+ sprintf (p, ",%x", len);
+ putpkt (buf);
+ getpkt (buf, 0);
+
+ if (buf[0] == '\0' || buf [0] == 'E')
+ return -1;
+
+ return 0;
+}
+
+int
+remote_insert_hw_breakpoint (addr, len)
+ CORE_ADDR addr;
+ int len;
+{
+ char buf[PBUFSIZ], *p = buf;
+
+ if (remote_protocol_Z.support == PACKET_DISABLE)
+ error ("Can't set hardware breakpoints without the 'Z' packet\n");
+
+ *(p++) = 'Z';
+ *(p++) = '1';
+ *(p++) = ',';
+
+ addr = remote_address_masked (addr);
+ p += hexnumstr (p, (ULONGEST) addr);
+ *p = '\0';
+
+ putpkt (buf);
+ getpkt (buf, 0);
+
+ if (buf[0] == '\0' || buf [0] == 'E')
+ return -1;
return 0;
}
-/* Read the remote registers into the block REGS. */
-/* Currently we just read all the registers, so we don't use regno. */
-/* ARGSUSED */
-static void
-remote_fetch_registers (regno)
- int regno;
+int
+remote_remove_hw_breakpoint (addr, len)
+ CORE_ADDR addr;
+ int len;
{
- char buf[PBUFSIZ];
- int i;
- char *p;
- char regs[REGISTER_BYTES];
+ char buf[PBUFSIZ], *p = buf;
+
+ *(p++) = 'z';
+ *(p++) = '1';
+ *(p++) = ',';
+
+ addr = remote_address_masked (addr);
+ p += hexnumstr (p, (ULONGEST) addr);
+ *p = '\0';
- sprintf (buf, "g");
- remote_send (buf);
+ putpkt(buf);
+ getpkt (buf, 0);
+
+ if (buf[0] == '\0' || buf [0] == 'E')
+ return -1;
- /* Reply describes registers byte by byte, each byte encoded as two
- hex characters. Suck them all up, then supply them to the
- register cacheing/storage mechanism. */
+ return 0;
+}
+#endif
- p = buf;
- for (i = 0; i < REGISTER_BYTES; i++)
+/* Some targets are only capable of doing downloads, and afterwards
+ they switch to the remote serial protocol. This function provides
+ a clean way to get from the download target to the remote target.
+ It's basically just a wrapper so that we don't have to expose any
+ of the internal workings of remote.c.
+
+ Prior to calling this routine, you should shutdown the current
+ target code, else you will get the "A program is being debugged
+ already..." message. Usually a call to pop_target() suffices. */
+
+void
+push_remote_target (name, from_tty)
+ char *name;
+ int from_tty;
+{
+ printf_filtered ("Switching to remote protocol\n");
+ remote_open (name, from_tty);
+}
+
+/* Other targets want to use the entire remote serial module but with
+ certain remote_ops overridden. */
+
+void
+open_remote_target (name, from_tty, target, extended_p)
+ char *name;
+ int from_tty;
+ struct target_ops *target;
+ int extended_p;
+{
+ printf_filtered ("Selecting the %sremote protocol\n",
+ (extended_p ? "extended-" : ""));
+ remote_open_1 (name, from_tty, target, extended_p);
+}
+
+/* Table used by the crc32 function to calcuate the checksum. */
+
+static unsigned long crc32_table[256] =
+{0, 0};
+
+static unsigned long
+crc32 (buf, len, crc)
+ unsigned char *buf;
+ int len;
+ unsigned int crc;
+{
+ if (!crc32_table[1])
{
- if (p[0] == 0 || p[1] == 0)
- error ("Remote reply is too short: %s", buf);
- regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
- p += 2;
+ /* Initialize the CRC table and the decoding table. */
+ int i, j;
+ unsigned int c;
+
+ for (i = 0; i < 256; i++)
+ {
+ for (c = i << 24, j = 8; j > 0; --j)
+ c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
+ crc32_table[i] = c;
+ }
}
- for (i = 0; i < NUM_REGS; i++)
- supply_register (i, ®s[REGISTER_BYTE(i)]);
+
+ while (len--)
+ {
+ crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255];
+ buf++;
+ }
+ return crc;
}
-/* Prepare to store registers. Since we send them all, we have to
- read out the ones we don't want to change first. */
+/* compare-sections command
-static void
-remote_prepare_to_store ()
+ With no arguments, compares each loadable section in the exec bfd
+ with the same memory range on the target, and reports mismatches.
+ Useful for verifying the image on the target against the exec file.
+ Depends on the target understanding the new "qCRC:" request. */
+
+static void
+compare_sections_command (args, from_tty)
+ char *args;
+ int from_tty;
{
- /* Make sure the entire registers array is valid. */
- read_register_bytes (0, (char *)NULL, REGISTER_BYTES);
+ asection *s;
+ unsigned long host_crc, target_crc;
+ extern bfd *exec_bfd;
+ struct cleanup *old_chain;
+ char *tmp;
+ char *sectdata;
+ char *sectname;
+ char *buf = alloca (PBUFSIZ);
+ bfd_size_type size;
+ bfd_vma lma;
+ int matched = 0;
+ int mismatched = 0;
+
+ if (!exec_bfd)
+ error ("command cannot be used without an exec file");
+ if (!current_target.to_shortname ||
+ strcmp (current_target.to_shortname, "remote") != 0)
+ error ("command can only be used with remote target");
+
+ for (s = exec_bfd->sections; s; s = s->next)
+ {
+ if (!(s->flags & SEC_LOAD))
+ continue; /* skip non-loadable section */
+
+ size = bfd_get_section_size_before_reloc (s);
+ if (size == 0)
+ continue; /* skip zero-length section */
+
+ sectname = (char *) bfd_get_section_name (exec_bfd, s);
+ if (args && strcmp (args, sectname) != 0)
+ continue; /* not the section selected by user */
+
+ matched = 1; /* do this section */
+ lma = s->lma;
+ /* FIXME: assumes lma can fit into long */
+ sprintf (buf, "qCRC:%lx,%lx", (long) lma, (long) size);
+ putpkt (buf);
+
+ /* be clever; compute the host_crc before waiting for target reply */
+ sectdata = xmalloc (size);
+ old_chain = make_cleanup (free, sectdata);
+ bfd_get_section_contents (exec_bfd, s, sectdata, 0, size);
+ host_crc = crc32 ((unsigned char *) sectdata, size, 0xffffffff);
+
+ getpkt (buf, 0);
+ if (buf[0] == 'E')
+ error ("target memory fault, section %s, range 0x%08x -- 0x%08x",
+ sectname, lma, lma + size);
+ if (buf[0] != 'C')
+ error ("remote target does not support this operation");
+
+ for (target_crc = 0, tmp = &buf[1]; *tmp; tmp++)
+ target_crc = target_crc * 16 + fromhex (*tmp);
+
+ printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
+ sectname, paddr (lma), paddr (lma + size));
+ if (host_crc == target_crc)
+ printf_filtered ("matched.\n");
+ else
+ {
+ printf_filtered ("MIS-MATCHED!\n");
+ mismatched++;
+ }
+
+ do_cleanups (old_chain);
+ }
+ if (mismatched > 0)
+ warning ("One or more sections of the remote executable does not match\n\
+the loaded file\n");
+ if (args && !matched)
+ printf_filtered ("No loaded section named '%s'.\n", args);
}
-/* Store the remote registers from the contents of the block REGISTERS.
- FIXME, eventually just store one register if that's all that is needed. */
+static int
+remote_query (query_type, buf, outbuf, bufsiz)
+ int query_type;
+ char *buf;
+ char *outbuf;
+ int *bufsiz;
+{
+ int i;
+ char *buf2 = alloca (PBUFSIZ);
+ char *p2 = &buf2[0];
+
+ if (!bufsiz)
+ error ("null pointer to remote bufer size specified");
+
+ /* minimum outbuf size is PBUFSIZ - if bufsiz is not large enough let
+ the caller know and return what the minimum size is */
+ /* Note: a zero bufsiz can be used to query the minimum buffer size */
+ if (*bufsiz < PBUFSIZ)
+ {
+ *bufsiz = PBUFSIZ;
+ return -1;
+ }
+
+ /* except for querying the minimum buffer size, target must be open */
+ if (!remote_desc)
+ error ("remote query is only available after target open");
+
+ /* we only take uppercase letters as query types, at least for now */
+ if ((query_type < 'A') || (query_type > 'Z'))
+ error ("invalid remote query type");
+
+ if (!buf)
+ error ("null remote query specified");
+
+ if (!outbuf)
+ error ("remote query requires a buffer to receive data");
+
+ outbuf[0] = '\0';
+
+ *p2++ = 'q';
+ *p2++ = query_type;
+
+ /* we used one buffer char for the remote protocol q command and another
+ for the query type. As the remote protocol encapsulation uses 4 chars
+ plus one extra in case we are debugging (remote_debug),
+ we have PBUFZIZ - 7 left to pack the query string */
+ i = 0;
+ while (buf[i] && (i < (PBUFSIZ - 8)))
+ {
+ /* bad caller may have sent forbidden characters */
+ if ((!isprint (buf[i])) || (buf[i] == '$') || (buf[i] == '#'))
+ error ("illegal characters in query string");
+
+ *p2++ = buf[i];
+ i++;
+ }
+ *p2 = buf[i];
+
+ if (buf[i])
+ error ("query larger than available buffer");
+
+ i = putpkt (buf2);
+ if (i < 0)
+ return i;
+
+ getpkt (outbuf, 0);
+
+ return 0;
+}
-/* ARGSUSED */
static void
-remote_store_registers (regno)
- int regno;
+remote_rcmd (char *command,
+ struct gdb_file *outbuf)
{
- char buf[PBUFSIZ];
int i;
- char *p;
+ char *buf = alloca (PBUFSIZ);
+ char *p = buf;
- buf[0] = 'G';
-
- /* Command describes registers byte by byte,
- each byte encoded as two hex characters. */
+ if (!remote_desc)
+ error ("remote rcmd is only available after target open");
- p = buf + 1;
- for (i = 0; i < REGISTER_BYTES; i++)
+ /* Send a NULL command across as an empty command */
+ if (command == NULL)
+ command = "";
+
+ /* The query prefix */
+ strcpy (buf, "qRcmd,");
+ p = strchr (buf, '\0');
+
+ if ((strlen (buf) + strlen (command) * 2 + 8/*misc*/) > PBUFSIZ)
+ error ("\"monitor\" command ``%s'' is too long\n", command);
+
+ /* Encode the actual command */
+ for (i = 0; command[i]; i++)
{
- *p++ = tohex ((registers[i] >> 4) & 0xf);
- *p++ = tohex (registers[i] & 0xf);
+ *p++ = tohex ((command[i] >> 4) & 0xf);
+ *p++ = tohex (command[i] & 0xf);
}
*p = '\0';
- remote_send (buf);
+ if (putpkt (buf) < 0)
+ error ("Communication problem with target\n");
+
+ /* get/display the response */
+ while (1)
+ {
+ /* XXX - see also tracepoint.c:remote_get_noisy_reply() */
+ buf[0] = '\0';
+ getpkt (buf, 0);
+ if (buf[0] == '\0')
+ error ("Target does not support this command\n");
+ if (buf[0] == 'O' && buf[1] != 'K')
+ {
+ remote_console_output (buf + 1); /* 'O' message from stub */
+ continue;
+ }
+ if (strcmp (buf, "OK") == 0)
+ break;
+ if (strlen (buf) == 3 && buf[0] == 'E'
+ && isdigit (buf[1]) && isdigit (buf[2]))
+ {
+ error ("Protocol error with Rcmd");
+ }
+ for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
+ {
+ char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
+ fputc_unfiltered (c, outbuf);
+ }
+ break;
+ }
+}
+
+static void
+packet_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ char *buf = alloca (PBUFSIZ);
+
+ if (!remote_desc)
+ error ("command can only be used with remote target");
+
+ if (!args)
+ error ("remote-packet command requires packet text as argument");
+
+ puts_filtered ("sending: ");
+ print_packet (args);
+ puts_filtered ("\n");
+ putpkt (args);
+
+ getpkt (buf, 0);
+ puts_filtered ("received: ");
+ print_packet (buf);
+ puts_filtered ("\n");
}
#if 0
+/* --------- UNIT_TEST for THREAD oriented PACKETS ------------------------- */
-/* Use of the data cache is disabled because it loses for looking at
- and changing hardware I/O ports and the like. Accepting `volatile'
- would perhaps be one way to fix it, but a better way which would
- win for more cases would be to use the executable file for the text
- segment, like the `icache' code below but done cleanly (in some
- target-independent place, perhaps in target_xfer_memory, perhaps
- based on assigning each target a speed or perhaps by some simpler
- mechanism). */
+static void display_thread_info PARAMS ((struct gdb_ext_thread_info * info));
-/* Read a word from remote address ADDR and return it.
- This goes through the data cache. */
+static void threadset_test_cmd PARAMS ((char *cmd, int tty));
-static int
-remote_fetch_word (addr)
- CORE_ADDR addr;
+static void threadalive_test PARAMS ((char *cmd, int tty));
+
+static void threadlist_test_cmd PARAMS ((char *cmd, int tty));
+
+int get_and_display_threadinfo PARAMS ((threadref * ref));
+
+static void threadinfo_test_cmd PARAMS ((char *cmd, int tty));
+
+static int thread_display_step PARAMS ((threadref * ref, void *context));
+
+static void threadlist_update_test_cmd PARAMS ((char *cmd, int tty));
+
+static void init_remote_threadtests PARAMS ((void));
+
+#define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid */
+
+static void
+threadset_test_cmd (cmd, tty)
+ char *cmd;
+ int tty;
{
-#if 0
- if (icache)
+ int sample_thread = SAMPLE_THREAD;
+
+ printf_filtered ("Remote threadset test\n");
+ set_thread (sample_thread, 1);
+}
+
+
+static void
+threadalive_test (cmd, tty)
+ char *cmd;
+ int tty;
+{
+ int sample_thread = SAMPLE_THREAD;
+
+ if (remote_thread_alive (sample_thread))
+ printf_filtered ("PASS: Thread alive test\n");
+ else
+ printf_filtered ("FAIL: Thread alive test\n");
+}
+
+void output_threadid PARAMS ((char *title, threadref * ref));
+
+void
+output_threadid (title, ref)
+ char *title;
+ threadref *ref;
+{
+ char hexid[20];
+
+ pack_threadid (&hexid[0], ref); /* Convert threead id into hex */
+ hexid[16] = 0;
+ printf_filtered ("%s %s\n", title, (&hexid[0]));
+}
+
+static void
+threadlist_test_cmd (cmd, tty)
+ char *cmd;
+ int tty;
+{
+ int startflag = 1;
+ threadref nextthread;
+ int done, result_count;
+ threadref threadlist[3];
+
+ printf_filtered ("Remote Threadlist test\n");
+ if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
+ &result_count, &threadlist[0]))
+ printf_filtered ("FAIL: threadlist test\n");
+ else
{
- extern CORE_ADDR text_start, text_end;
+ threadref *scan = threadlist;
+ threadref *limit = scan + result_count;
- if (addr >= text_start && addr < text_end)
- {
- int buffer;
- xfer_core_file (addr, &buffer, sizeof (int));
- return buffer;
- }
+ while (scan < limit)
+ output_threadid (" thread ", scan++);
}
-#endif
- return dcache_fetch (remote_dcache, addr);
}
-/* Write a word WORD into remote address ADDR.
- This goes through the data cache. */
+void
+display_thread_info (info)
+ struct gdb_ext_thread_info *info;
+{
+ output_threadid ("Threadid: ", &info->threadid);
+ printf_filtered ("Name: %s\n ", info->shortname);
+ printf_filtered ("State: %s\n", info->display);
+ printf_filtered ("other: %s\n\n", info->more_display);
+}
+
+int
+get_and_display_threadinfo (ref)
+ threadref *ref;
+{
+ int result;
+ int set;
+ struct gdb_ext_thread_info threadinfo;
+
+ set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
+ | TAG_MOREDISPLAY | TAG_DISPLAY;
+ if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
+ display_thread_info (&threadinfo);
+ return result;
+}
static void
-remote_store_word (addr, word)
- CORE_ADDR addr;
- int word;
+threadinfo_test_cmd (cmd, tty)
+ char *cmd;
+ int tty;
{
- dcache_poke (remote_dcache, addr, word);
+ int athread = SAMPLE_THREAD;
+ threadref thread;
+ int set;
+
+ int_to_threadref (&thread, athread);
+ printf_filtered ("Remote Threadinfo test\n");
+ if (!get_and_display_threadinfo (&thread))
+ printf_filtered ("FAIL cannot get thread info\n");
+}
+
+static int
+thread_display_step (ref, context)
+ threadref *ref;
+ void *context;
+{
+ /* output_threadid(" threadstep ",ref); *//* simple test */
+ return get_and_display_threadinfo (ref);
+}
+
+static void
+threadlist_update_test_cmd (cmd, tty)
+ char *cmd;
+ int tty;
+{
+ printf_filtered ("Remote Threadlist update test\n");
+ remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
+}
+
+static void
+init_remote_threadtests (void)
+{
+ add_com ("tlist", class_obscure, threadlist_test_cmd,
+ "Fetch and print the remote list of thread identifiers, one pkt only");
+ add_com ("tinfo", class_obscure, threadinfo_test_cmd,
+ "Fetch and display info about one thread");
+ add_com ("tset", class_obscure, threadset_test_cmd,
+ "Test setting to a different thread");
+ add_com ("tupd", class_obscure, threadlist_update_test_cmd,
+ "Iterate through updating all remote thread info");
+ add_com ("talive", class_obscure, threadalive_test,
+ " Remote thread alive test ");
}
+
#endif /* 0 */
-\f
-/* Write memory data directly to the remote machine.
- This does not inform the data cache; the data cache uses this.
- MEMADDR is the address in the remote memory space.
- MYADDR is the address of the buffer in our space.
- LEN is the number of bytes.
- Returns number of bytes transferred, or 0 for error. */
+static void
+init_remote_ops ()
+{
+ remote_ops.to_shortname = "remote";
+ remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
+ remote_ops.to_doc =
+ "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
+Specify the serial device it is connected to (e.g. /dev/ttya).";
+ remote_ops.to_open = remote_open;
+ remote_ops.to_close = remote_close;
+ remote_ops.to_detach = remote_detach;
+ remote_ops.to_resume = remote_resume;
+ remote_ops.to_wait = remote_wait;
+ remote_ops.to_fetch_registers = remote_fetch_registers;
+ remote_ops.to_store_registers = remote_store_registers;
+ remote_ops.to_prepare_to_store = remote_prepare_to_store;
+ remote_ops.to_xfer_memory = remote_xfer_memory;
+ remote_ops.to_files_info = remote_files_info;
+ remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
+ remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
+ remote_ops.to_kill = remote_kill;
+ remote_ops.to_load = generic_load;
+ remote_ops.to_mourn_inferior = remote_mourn;
+ remote_ops.to_thread_alive = remote_thread_alive;
+ remote_ops.to_find_new_threads = remote_threads_info;
+ remote_ops.to_stop = remote_stop;
+ remote_ops.to_query = remote_query;
+ remote_ops.to_rcmd = remote_rcmd;
+ remote_ops.to_stratum = process_stratum;
+ remote_ops.to_has_all_memory = 1;
+ remote_ops.to_has_memory = 1;
+ remote_ops.to_has_stack = 1;
+ remote_ops.to_has_registers = 1;
+ remote_ops.to_has_execution = 1;
+ remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
+ remote_ops.to_magic = OPS_MAGIC;
+}
-static int
-remote_write_bytes (memaddr, myaddr, len)
- CORE_ADDR memaddr;
- unsigned char *myaddr;
- int len;
+/* Set up the extended remote vector by making a copy of the standard
+ remote vector and adding to it. */
+
+static void
+init_extended_remote_ops ()
{
- char buf[PBUFSIZ];
- int i;
- char *p;
+ extended_remote_ops = remote_ops;
+
+ extended_remote_ops.to_shortname = "extended-remote";
+ extended_remote_ops.to_longname =
+ "Extended remote serial target in gdb-specific protocol";
+ extended_remote_ops.to_doc =
+ "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
+Specify the serial device it is connected to (e.g. /dev/ttya).",
+ extended_remote_ops.to_open = extended_remote_open;
+ extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
+ extended_remote_ops.to_mourn_inferior = extended_remote_mourn;
+}
- if (len > PBUFSIZ / 2 - 20)
- abort ();
+/*
+ * Command: info remote-process
+ *
+ * This implements Cisco's version of the "info proc" command.
+ *
+ * This query allows the target stub to return an arbitrary string
+ * (or strings) giving arbitrary information about the target process.
+ * This is optional; the target stub isn't required to implement it.
+ *
+ * Syntax: qfProcessInfo request first string
+ * qsProcessInfo request subsequent string
+ * reply: 'O'<hex-encoded-string>
+ * 'l' last reply (empty)
+ */
- sprintf (buf, "M%x,%x:", memaddr, len);
+static void
+remote_info_process (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ char *buf = alloca (PBUFSIZ);
- /* We send target system values byte by byte, in increasing byte addresses,
- each byte encoded as two hex characters. */
+ if (remote_desc == 0)
+ error ("Command can only be used when connected to the remote target.");
- p = buf + strlen (buf);
- for (i = 0; i < len; i++)
+ putpkt ("qfProcessInfo");
+ getpkt (buf, 0);
+ if (buf[0] == 0)
+ return; /* Silently: target does not support this feature. */
+
+ if (buf[0] == 'E')
+ error ("info proc: target error.");
+
+ while (buf[0] == 'O') /* Capitol-O packet */
+ {
+ remote_console_output (&buf[1]);
+ putpkt ("qsProcessInfo");
+ getpkt (buf, 0);
+ }
+}
+
+/*
+ * Target Cisco
+ */
+
+static void
+remote_cisco_open (name, from_tty)
+ char *name;
+ int from_tty;
+{
+ if (name == 0)
+ error (
+ "To open a remote debug connection, you need to specify what \n\
+device is attached to the remote system (e.g. host:port).");
+
+ target_preopen (from_tty);
+
+ unpush_target (&remote_cisco_ops);
+
+ remote_dcache = dcache_init (remote_read_bytes, remote_write_bytes);
+
+ remote_desc = SERIAL_OPEN (name);
+ if (!remote_desc)
+ perror_with_name (name);
+
+ /*
+ * If a baud rate was specified on the gdb command line it will
+ * be greater than the initial value of -1. If it is, use it otherwise
+ * default to 9600
+ */
+
+ baud_rate = (baud_rate > 0) ? baud_rate : 9600;
+ if (SERIAL_SETBAUDRATE (remote_desc, baud_rate))
{
- *p++ = tohex ((myaddr[i] >> 4) & 0xf);
- *p++ = tohex (myaddr[i] & 0xf);
+ SERIAL_CLOSE (remote_desc);
+ perror_with_name (name);
}
- *p = '\0';
- putpkt (buf);
- getpkt (buf, 0);
+ SERIAL_RAW (remote_desc);
- if (buf[0] == 'E')
+ /* If there is something sitting in the buffer we might take it as a
+ response to a command, which would be bad. */
+ SERIAL_FLUSH_INPUT (remote_desc);
+
+ if (from_tty)
{
- /* There is no correspondance between what the remote protocol uses
- for errors and errno codes. We would like a cleaner way of
- representing errors (big enough to include errno codes, bfd_error
- codes, and others). But for now just return EIO. */
- errno = EIO;
- return 0;
+ puts_filtered ("Remote debugging using ");
+ puts_filtered (name);
+ puts_filtered ("\n");
}
- return len;
-}
-/* Read memory data directly from the remote machine.
- This does not use the data cache; the data cache uses this.
- MEMADDR is the address in the remote memory space.
- MYADDR is the address of the buffer in our space.
- LEN is the number of bytes.
+ remote_cisco_mode = 1;
- Returns number of bytes transferred, or 0 for error. */
+ push_target (&remote_cisco_ops); /* Switch to using cisco target now */
-static int
-remote_read_bytes (memaddr, myaddr, len)
- CORE_ADDR memaddr;
- unsigned char *myaddr;
- int len;
-{
- char buf[PBUFSIZ];
- int i;
- char *p;
+ init_packet_config (&remote_protocol_P);
+ init_packet_config (&remote_protocol_Z);
- if (len > PBUFSIZ / 2 - 1)
- abort ();
+ general_thread = -2;
+ continue_thread = -2;
- sprintf (buf, "m%x,%x", memaddr, len);
- putpkt (buf);
- getpkt (buf, 0);
+ /* Force remote_write_bytes to check whether target supports
+ binary downloading. */
+ init_packet_config (&remote_protocol_binary_download);
- if (buf[0] == 'E')
- {
- /* There is no correspondance between what the remote protocol uses
- for errors and errno codes. We would like a cleaner way of
- representing errors (big enough to include errno codes, bfd_error
- codes, and others). But for now just return EIO. */
- errno = EIO;
- return 0;
- }
+ /* Without this, some commands which require an active target (such
+ as kill) won't work. This variable serves (at least) double duty
+ as both the pid of the target process (if it has such), and as a
+ flag indicating that a target is active. These functions should
+ be split out into seperate variables, especially since GDB will
+ someday have a notion of debugging several processes. */
+ inferior_pid = MAGIC_NULL_PID;
- /* Reply describes memory byte by byte,
- each byte encoded as two hex characters. */
+ /* Start the remote connection; if error (0), discard this target. */
- p = buf;
- for (i = 0; i < len; i++)
+ if (!catch_errors (remote_start_remote_dummy, (char *) 0,
+ "Couldn't establish connection to remote target\n",
+ RETURN_MASK_ALL))
{
- if (p[0] == 0 || p[1] == 0)
- /* Reply is short. This means that we were able to read only part
- of what we wanted to. */
- break;
- myaddr[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
- p += 2;
+ pop_target ();
+ return;
}
- return i;
}
-\f
-/* Read or write LEN bytes from inferior memory at MEMADDR, transferring
- to or from debugger address MYADDR. Write to inferior if SHOULD_WRITE is
- nonzero. Returns length of data written or read; 0 for error. */
-/* ARGSUSED */
+static void
+remote_cisco_close (quitting)
+ int quitting;
+{
+ remote_cisco_mode = 0;
+ remote_close (quitting);
+}
+
+static void
+ remote_cisco_mourn
+PARAMS ((void))
+{
+ remote_mourn_1 (&remote_cisco_ops);
+}
+
+enum
+{
+ READ_MORE,
+ FATAL_ERROR,
+ ENTER_DEBUG,
+ DISCONNECT_TELNET
+}
+minitelnet_return;
+
+/* shared between readsocket() and readtty() */
+static char *tty_input;
+
+static int escape_count;
+static int echo_check;
+extern int quit_flag;
+
static int
-remote_xfer_memory(memaddr, myaddr, len, should_write, target)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
- int should_write;
- struct target_ops *target; /* ignored */
+readsocket ()
{
- int xfersize;
- int bytes_xferred;
- int total_xferred = 0;
+ int data;
- while (len > 0)
+ /* Loop until the socket doesn't have any more data */
+
+ while ((data = readchar (0)) >= 0)
{
- if (len > MAXBUFBYTES)
- xfersize = MAXBUFBYTES;
+ /* Check for the escape sequence */
+ if (data == '|')
+ {
+ /* If this is the fourth escape, get out */
+ if (++escape_count == 4)
+ {
+ return ENTER_DEBUG;
+ }
+ else
+ { /* This is a '|', but not the fourth in a row.
+ Continue without echoing it. If it isn't actually
+ one of four in a row, it'll be echoed later. */
+ continue;
+ }
+ }
else
- xfersize = len;
+ /* Not a '|' */
+ {
+ /* Ensure any pending '|'s are flushed. */
- if (should_write)
- bytes_xferred = remote_write_bytes (memaddr, myaddr, xfersize);
- else
- bytes_xferred = remote_read_bytes (memaddr, myaddr, xfersize);
+ for (; escape_count > 0; escape_count--)
+ putchar ('|');
+ }
- /* If we get an error, we are done xferring. */
- if (bytes_xferred == 0)
- break;
+ if (data == '\r') /* If this is a return character, */
+ continue; /* - just supress it. */
- memaddr += bytes_xferred;
- myaddr += bytes_xferred;
- len -= bytes_xferred;
- total_xferred += bytes_xferred;
+ if (echo_check != -1) /* Check for echo of user input. */
+ {
+ if (tty_input[echo_check] == data)
+ {
+ echo_check++; /* Character matched user input: */
+ continue; /* Continue without echoing it. */
+ }
+ else if ((data == '\n') && (tty_input[echo_check] == '\r'))
+ { /* End of the line (and of echo checking). */
+ echo_check = -1; /* No more echo supression */
+ continue; /* Continue without echoing. */
+ }
+ else
+ { /* Failed check for echo of user input.
+ We now have some suppressed output to flush! */
+ int j;
+
+ for (j = 0; j < echo_check; j++)
+ putchar (tty_input[j]);
+ echo_check = -1;
+ }
+ }
+ putchar (data); /* Default case: output the char. */
}
- return total_xferred;
-}
-static void
-remote_files_info (ignore)
- struct target_ops *ignore;
-{
- puts_filtered ("Debugging a target over a serial line.\n");
+ if (data == SERIAL_TIMEOUT) /* Timeout returned from readchar. */
+ return READ_MORE; /* Try to read some more */
+ else
+ return FATAL_ERROR; /* Trouble, bail out */
}
-\f
-/* Stuff for dealing with the packets which are part of this protocol.
- See comment at top of file for details. */
-
-/* Read a single character from the remote end, masking it down to 7 bits. */
static int
-readchar ()
+readtty ()
{
- int ch;
+ int tty_bytecount;
- ch = SERIAL_READCHAR (remote_desc, timeout);
-
- if (ch < 0)
- return ch;
+ /* First, read a buffer full from the terminal */
+ tty_bytecount = read (fileno (stdin), tty_input, sizeof (tty_input) - 1);
+ if (tty_bytecount == -1)
+ {
+ perror ("readtty: read failed");
+ return FATAL_ERROR;
+ }
- return ch & 0x7f;
-}
+ /* Remove a quoted newline. */
+ if (tty_input[tty_bytecount - 1] == '\n' &&
+ tty_input[tty_bytecount - 2] == '\\') /* line ending in backslash */
+ {
+ tty_input[--tty_bytecount] = 0; /* remove newline */
+ tty_input[--tty_bytecount] = 0; /* remove backslash */
+ }
-/* Send the command in BUF to the remote machine,
- and read the reply into BUF.
- Report an error if we get an error reply. */
+ /* Turn trailing newlines into returns */
+ if (tty_input[tty_bytecount - 1] == '\n')
+ tty_input[tty_bytecount - 1] = '\r';
-static void
-remote_send (buf)
- char *buf;
-{
+ /* If the line consists of a ~, enter debugging mode. */
+ if ((tty_input[0] == '~') && (tty_bytecount == 2))
+ return ENTER_DEBUG;
- putpkt (buf);
- getpkt (buf, 0);
+ /* Make this a zero terminated string and write it out */
+ tty_input[tty_bytecount] = 0;
+ if (SERIAL_WRITE (remote_desc, tty_input, tty_bytecount))
+ {
+ perror_with_name ("readtty: write failed");
+ return FATAL_ERROR;
+ }
- if (buf[0] == 'E')
- error ("Remote failure reply: %s", buf);
+ return READ_MORE;
}
-/* Send a packet to the remote machine, with error checking.
- The data of the packet is in BUF. */
-
-static void
-putpkt (buf)
- char *buf;
+static int
+minitelnet ()
{
- int i;
- unsigned char csum = 0;
- char buf2[PBUFSIZ];
- int cnt = strlen (buf);
- int ch;
- char *p;
+ fd_set input; /* file descriptors for select */
+ int tablesize; /* max number of FDs for select */
+ int status;
+ int quit_count = 0;
- /* Copy the packet into buffer BUF2, encapsulating it
- and giving it a checksum. */
+ extern int escape_count; /* global shared by readsocket */
+ extern int echo_check; /* ditto */
- if (cnt > sizeof(buf2) - 5) /* Prosanity check */
- abort();
+ escape_count = 0;
+ echo_check = -1;
- p = buf2;
- *p++ = '$';
+ tablesize = 8 * sizeof (input);
- for (i = 0; i < cnt; i++)
+ for (;;)
{
- csum += buf[i];
- *p++ = buf[i];
- }
- *p++ = '#';
- *p++ = tohex ((csum >> 4) & 0xf);
- *p++ = tohex (csum & 0xf);
-
- /* Send it over and over until we get a positive ack. */
+ /* Check for anything from our socket - doesn't block. Note that
+ this must be done *before* the select as there may be
+ buffered I/O waiting to be processed. */
- while (1)
- {
- if (remote_debug)
+ if ((status = readsocket ()) == FATAL_ERROR)
{
- *p = '\0';
- printf ("Sending packet: %s...", buf2); fflush(stdout);
+ error ("Debugging terminated by communications error");
}
- if (SERIAL_WRITE (remote_desc, buf2, p - buf2))
- perror_with_name ("putpkt: write failed");
-
- /* read until either a timeout occurs (-2) or '+' is read */
- while (1)
+ else if (status != READ_MORE)
{
- ch = readchar ();
-
- switch (ch)
- {
- case '+':
- if (remote_debug)
- printf("Ack\n");
- return;
- case SERIAL_TIMEOUT:
- break; /* Retransmit buffer */
- case SERIAL_ERROR:
- perror_with_name ("putpkt: couldn't read ACK");
- case SERIAL_EOF:
- error ("putpkt: EOF while trying to read ACK");
- default:
- if (remote_debug)
- printf ("%02X %c ", ch&0xFF, ch);
- continue;
- }
- break; /* Here to retransmit */
+ return (status);
}
- }
-}
-
-/* Read a packet from the remote machine, with error checking,
- and store it in BUF. BUF is expected to be of size PBUFSIZ.
- If FOREVER, wait forever rather than timing out; this is used
- while the target is executing user code. */
-static void
-getpkt (buf, forever)
- char *buf;
- int forever;
-{
- char *bp;
- unsigned char csum;
- int c = 0;
- unsigned char c1, c2;
- int retries = 0;
-#define MAX_RETRIES 10
+ fflush (stdout); /* Flush output before blocking */
- while (1)
- {
- /* This can loop forever if the remote side sends us characters
- continuously, but if it pauses, we'll get a zero from readchar
- because of timeout. Then we'll count that as a retry. */
+ /* Now block on more socket input or TTY input */
- c = readchar();
- if (c > 0 && c != '$')
- continue;
+ FD_ZERO (&input);
+ FD_SET (fileno (stdin), &input);
+ FD_SET (remote_desc->fd, &input);
- if (c == SERIAL_TIMEOUT)
+ status = select (tablesize, &input, 0, 0, 0);
+ if ((status == -1) && (errno != EINTR))
{
- if (forever)
- continue;
- if (++retries >= MAX_RETRIES)
- if (remote_debug) puts_filtered ("Timed out.\n");
- goto out;
+ error ("Communications error on select %d", errno);
}
- if (c == SERIAL_EOF)
- error ("Remote connection closed");
- if (c == SERIAL_ERROR)
- perror_with_name ("Remote communication error");
-
- /* Force csum to be zero here because of possible error retry. */
- csum = 0;
- bp = buf;
+ /* Handle Control-C typed */
- while (1)
+ if (quit_flag)
{
- c = readchar ();
- if (c == SERIAL_TIMEOUT)
- {
- if (remote_debug)
- puts_filtered ("Timeout in mid-packet, retrying\n");
- goto whole; /* Start a new packet, count retries */
- }
- if (c == '$')
+ if ((++quit_count) == 2)
{
- if (remote_debug)
- puts_filtered ("Saw new packet start in middle of old one\n");
- goto whole; /* Start a new packet, count retries */
+ if (query ("Interrupt GDB? "))
+ {
+ printf_filtered ("Interrupted by user.\n");
+ return_to_top_level (RETURN_QUIT);
+ }
+ quit_count = 0;
}
- if (c == '#')
- break;
- if (bp >= buf+PBUFSIZ-1)
- {
- *bp = '\0';
- puts_filtered ("Remote packet too long: ");
- puts_filtered (buf);
- puts_filtered ("\n");
- goto whole;
- }
- *bp++ = c;
- csum += c;
- }
- *bp = 0;
+ quit_flag = 0;
- c1 = fromhex (readchar ());
- c2 = fromhex (readchar ());
- if ((csum & 0xff) == (c1 << 4) + c2)
- break;
- printf_filtered ("Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
- (c1 << 4) + c2, csum & 0xff);
- puts_filtered (buf);
- puts_filtered ("\n");
+ if (remote_break)
+ SERIAL_SEND_BREAK (remote_desc);
+ else
+ SERIAL_WRITE (remote_desc, "\003", 1);
- /* Try the whole thing again. */
-whole:
- if (++retries < MAX_RETRIES)
- {
- SERIAL_WRITE (remote_desc, "-", 1);
+ continue;
}
- else
+
+ /* Handle console input */
+
+ if (FD_ISSET (fileno (stdin), &input))
{
- printf ("Ignoring packet error, continuing...\n");
- break;
+ quit_count = 0;
+ echo_check = 0;
+ status = readtty ();
+ if (status == READ_MORE)
+ continue;
+
+ return status; /* telnet session ended */
}
}
+}
-out:
+static int
+remote_cisco_wait (pid, status)
+ int pid;
+ struct target_waitstatus *status;
+{
+ if (minitelnet () != ENTER_DEBUG)
+ {
+ error ("Debugging session terminated by protocol error");
+ }
+ putpkt ("?");
+ return remote_wait (pid, status);
+}
- SERIAL_WRITE (remote_desc, "+", 1);
+static void
+init_remote_cisco_ops ()
+{
+ remote_cisco_ops.to_shortname = "cisco";
+ remote_cisco_ops.to_longname = "Remote serial target in cisco-specific protocol";
+ remote_cisco_ops.to_doc =
+ "Use a remote machine via TCP, using a cisco-specific protocol.\n\
+Specify the serial device it is connected to (e.g. host:2020).";
+ remote_cisco_ops.to_open = remote_cisco_open;
+ remote_cisco_ops.to_close = remote_cisco_close;
+ remote_cisco_ops.to_detach = remote_detach;
+ remote_cisco_ops.to_resume = remote_resume;
+ remote_cisco_ops.to_wait = remote_cisco_wait;
+ remote_cisco_ops.to_fetch_registers = remote_fetch_registers;
+ remote_cisco_ops.to_store_registers = remote_store_registers;
+ remote_cisco_ops.to_prepare_to_store = remote_prepare_to_store;
+ remote_cisco_ops.to_xfer_memory = remote_xfer_memory;
+ remote_cisco_ops.to_files_info = remote_files_info;
+ remote_cisco_ops.to_insert_breakpoint = remote_insert_breakpoint;
+ remote_cisco_ops.to_remove_breakpoint = remote_remove_breakpoint;
+ remote_cisco_ops.to_kill = remote_kill;
+ remote_cisco_ops.to_load = generic_load;
+ remote_cisco_ops.to_mourn_inferior = remote_cisco_mourn;
+ remote_cisco_ops.to_thread_alive = remote_thread_alive;
+ remote_cisco_ops.to_find_new_threads = remote_threads_info;
+ remote_cisco_ops.to_stratum = process_stratum;
+ remote_cisco_ops.to_has_all_memory = 1;
+ remote_cisco_ops.to_has_memory = 1;
+ remote_cisco_ops.to_has_stack = 1;
+ remote_cisco_ops.to_has_registers = 1;
+ remote_cisco_ops.to_has_execution = 1;
+ remote_cisco_ops.to_magic = OPS_MAGIC;
+}
- if (remote_debug)
- fprintf (stderr,"Packet received: %s\n", buf);
+/* Target async and target extended-async.
+
+ This are temporary targets, until it is all tested. Eventually
+ async support will be incorporated int the usual 'remote'
+ target. */
+
+static void
+init_remote_async_ops ()
+{
+ remote_async_ops.to_shortname = "async";
+ remote_async_ops.to_longname = "Remote serial target in async version of the gdb-specific protocol";
+ remote_async_ops.to_doc =
+ "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
+Specify the serial device it is connected to (e.g. /dev/ttya).";
+ remote_async_ops.to_open = remote_async_open;
+ remote_async_ops.to_close = remote_close;
+ remote_async_ops.to_detach = remote_async_detach;
+ remote_async_ops.to_resume = remote_async_resume;
+ remote_async_ops.to_wait = remote_async_wait;
+ remote_async_ops.to_fetch_registers = remote_fetch_registers;
+ remote_async_ops.to_store_registers = remote_store_registers;
+ remote_async_ops.to_prepare_to_store = remote_prepare_to_store;
+ remote_async_ops.to_xfer_memory = remote_xfer_memory;
+ remote_async_ops.to_files_info = remote_files_info;
+ remote_async_ops.to_insert_breakpoint = remote_insert_breakpoint;
+ remote_async_ops.to_remove_breakpoint = remote_remove_breakpoint;
+ remote_async_ops.to_kill = remote_async_kill;
+ remote_async_ops.to_load = generic_load;
+ remote_async_ops.to_mourn_inferior = remote_async_mourn;
+ remote_async_ops.to_thread_alive = remote_thread_alive;
+ remote_async_ops.to_find_new_threads = remote_threads_info;
+ remote_async_ops.to_stop = remote_stop;
+ remote_async_ops.to_query = remote_query;
+ remote_async_ops.to_rcmd = remote_rcmd;
+ remote_async_ops.to_stratum = process_stratum;
+ remote_async_ops.to_has_all_memory = 1;
+ remote_async_ops.to_has_memory = 1;
+ remote_async_ops.to_has_stack = 1;
+ remote_async_ops.to_has_registers = 1;
+ remote_async_ops.to_has_execution = 1;
+ remote_async_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
+ remote_async_ops.to_has_async_exec = 1;
+ remote_async_ops.to_magic = OPS_MAGIC;
}
-\f
+
+/* Set up the async extended remote vector by making a copy of the standard
+ remote vector and adding to it. */
+
static void
-remote_kill ()
+init_extended_async_remote_ops ()
{
- putpkt ("k");
- /* Don't wait for it to die. I'm not really sure it matters whether
- we do or not. For the existing stubs, kill is a noop. */
- target_mourn_inferior ();
+ extended_async_remote_ops = remote_async_ops;
+
+ extended_async_remote_ops.to_shortname = "extended-async";
+ extended_async_remote_ops.to_longname =
+ "Extended remote serial target in async gdb-specific protocol";
+ extended_async_remote_ops.to_doc =
+ "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\
+Specify the serial device it is connected to (e.g. /dev/ttya).",
+ extended_async_remote_ops.to_open = extended_remote_async_open;
+ extended_async_remote_ops.to_create_inferior = extended_remote_async_create_inferior;
+ extended_async_remote_ops.to_mourn_inferior = extended_remote_mourn;
}
static void
-remote_mourn ()
+set_remote_cmd (args, from_tty)
+ char *args;
+ int from_tty;
{
- unpush_target (&remote_ops);
- generic_mourn_inferior ();
+
}
-\f
-#ifdef REMOTE_BREAKPOINT
-/* On some machines, e.g. 68k, we may use a different breakpoint instruction
- than other targets. */
-static unsigned char break_insn[] = REMOTE_BREAKPOINT;
-/* Check that it fits in BREAKPOINT_MAX bytes. */
-static unsigned char check_break_insn_size[BREAKPOINT_MAX] = REMOTE_BREAKPOINT;
+static void
+build_remote_gdbarch_data ()
+{
+ tty_input = xmalloc (PBUFSIZ);
+}
-#else /* No REMOTE_BREAKPOINT. */
+void
+_initialize_remote ()
+{
+ static struct cmd_list_element *remote_set_cmdlist;
+ static struct cmd_list_element *remote_show_cmdlist;
-/* Same old breakpoint instruction. This code does nothing different
- than mem-break.c. */
-static unsigned char break_insn[] = BREAKPOINT;
+ /* architecture specific data */
+ build_remote_gdbarch_data ();
+ register_gdbarch_swap (&tty_input, sizeof (&tty_input), NULL);
+ register_gdbarch_swap (NULL, 0, build_remote_gdbarch_data);
-#endif /* No REMOTE_BREAKPOINT. */
+ /* runtime constants - we retain the value of remote_write_size
+ across architecture swaps. */
+ remote_write_size = PBUFSIZ;
-/* Insert a breakpoint on targets that don't have any better breakpoint
- support. We read the contents of the target location and stash it,
- then overwrite it with a breakpoint instruction. ADDR is the target
- location in the target machine. CONTENTS_CACHE is a pointer to
- memory allocated for saving the target contents. It is guaranteed
- by the caller to be long enough to save sizeof BREAKPOINT bytes (this
- is accomplished via BREAKPOINT_MAX). */
+ init_remote_ops ();
+ add_target (&remote_ops);
-static int
-remote_insert_breakpoint (addr, contents_cache)
- CORE_ADDR addr;
- char *contents_cache;
-{
- int val;
+ init_extended_remote_ops ();
+ add_target (&extended_remote_ops);
- val = target_read_memory (addr, contents_cache, sizeof break_insn);
+ init_remote_async_ops ();
+ add_target (&remote_async_ops);
- if (val == 0)
- val = target_write_memory (addr, (char *)break_insn, sizeof break_insn);
+ init_extended_async_remote_ops ();
+ add_target (&extended_async_remote_ops);
- return val;
-}
+ init_remote_cisco_ops ();
+ add_target (&remote_cisco_ops);
-static int
-remote_remove_breakpoint (addr, contents_cache)
- CORE_ADDR addr;
- char *contents_cache;
-{
- return target_write_memory (addr, contents_cache, sizeof break_insn);
-}
-\f
-/* Define the target subroutine names */
+#if 0
+ init_remote_threadtests ();
+#endif
-struct target_ops remote_ops = {
- "remote", /* to_shortname */
- "Remote serial target in gdb-specific protocol", /* to_longname */
- "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
-Specify the serial device it is connected to (e.g. /dev/ttya).", /* to_doc */
- remote_open, /* to_open */
- remote_close, /* to_close */
- NULL, /* to_attach */
- remote_detach, /* to_detach */
- remote_resume, /* to_resume */
- remote_wait, /* to_wait */
- remote_fetch_registers, /* to_fetch_registers */
- remote_store_registers, /* to_store_registers */
- remote_prepare_to_store, /* to_prepare_to_store */
- remote_xfer_memory, /* to_xfer_memory */
- remote_files_info, /* to_files_info */
-
- remote_insert_breakpoint, /* to_insert_breakpoint */
- remote_remove_breakpoint, /* to_remove_breakpoint */
-
- NULL, /* to_terminal_init */
- NULL, /* to_terminal_inferior */
- NULL, /* to_terminal_ours_for_output */
- NULL, /* to_terminal_ours */
- NULL, /* to_terminal_info */
- remote_kill, /* to_kill */
- generic_load, /* to_load */
- NULL, /* to_lookup_symbol */
- NULL, /* to_create_inferior */
- remote_mourn, /* to_mourn_inferior */
- 0, /* to_can_run */
- 0, /* to_notice_signals */
- process_stratum, /* to_stratum */
- NULL, /* to_next */
- 1, /* to_has_all_memory */
- 1, /* to_has_memory */
- 1, /* to_has_stack */
- 1, /* to_has_registers */
- 1, /* to_has_execution */
- NULL, /* sections */
- NULL, /* sections_end */
- OPS_MAGIC /* to_magic */
-};
+ add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, "\
+Remote protocol specific variables\n\
+Configure various remote-protocol specific variables such as\n\
+the packets being used",
+ &remote_set_cmdlist, "set remote ",
+ 0/*allow-unknown*/, &setlist);
+ add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, "\
+Remote protocol specific variables\n\
+Configure various remote-protocol specific variables such as\n\
+the packets being used",
+ &remote_show_cmdlist, "show remote ",
+ 0/*allow-unknown*/, &showlist);
+
+ add_cmd ("compare-sections", class_obscure, compare_sections_command,
+ "Compare section data on target to the exec file.\n\
+Argument is a single section name (default: all loaded sections).",
+ &cmdlist);
+
+ add_cmd ("packet", class_maintenance, packet_command,
+ "Send an arbitrary packet to a remote target.\n\
+ maintenance packet TEXT\n\
+If GDB is talking to an inferior via the GDB serial protocol, then\n\
+this command sends the string TEXT to the inferior, and displays the\n\
+response packet. GDB supplies the initial `$' character, and the\n\
+terminating `#' character and checksum.",
+ &maintenancelist);
+
+ add_show_from_set
+ (add_set_cmd ("remotetimeout", no_class,
+ var_integer, (char *) &remote_timeout,
+ "Set timeout value for remote read.\n",
+ &setlist),
+ &showlist);
+
+ add_show_from_set
+ (add_set_cmd ("remotebreak", no_class,
+ var_boolean, (char *) &remote_break,
+ "Set whether to send break if interrupted.\n",
+ &setlist),
+ &showlist);
+
+ add_show_from_set
+ (add_set_cmd ("remotewritesize", no_class,
+ var_integer, (char *) &remote_write_size,
+ "Set the maximum number of bytes per memory write packet.\n",
+ &setlist),
+ &showlist);
+
+ remote_address_size = TARGET_PTR_BIT;
+ add_show_from_set
+ (add_set_cmd ("remoteaddresssize", class_obscure,
+ var_integer, (char *) &remote_address_size,
+ "Set the maximum size of the address (in bits) \
+in a memory packet.\n",
+ &setlist),
+ &showlist);
+
+ add_packet_config_cmd (&remote_protocol_binary_download,
+ "X", "binary-download",
+ set_remote_protocol_binary_download_cmd,
+ show_remote_protocol_binary_download_cmd,
+ &remote_set_cmdlist, &remote_show_cmdlist);
+#if 0
+ /* XXXX - should ``set remotebinarydownload'' be retained for
+ compatibility. */
+ add_show_from_set
+ (add_set_cmd ("remotebinarydownload", no_class,
+ var_boolean, (char *) &remote_binary_download,
+ "Set binary downloads.\n", &setlist),
+ &showlist);
+#endif
-void
-_initialize_remote ()
-{
- add_target (&remote_ops);
+ add_info ("remote-process", remote_info_process,
+ "Query the remote system for process info.");
+
+ add_packet_config_cmd (&remote_protocol_P, "P", "set-register",
+ set_remote_protocol_P_packet_cmd,
+ show_remote_protocol_P_packet_cmd,
+ &remote_set_cmdlist, &remote_show_cmdlist);
+
+ add_packet_config_cmd (&remote_protocol_Z, "Z", "breakpoint",
+ set_remote_protocol_Z_packet_cmd,
+ show_remote_protocol_Z_packet_cmd,
+ &remote_set_cmdlist, &remote_show_cmdlist);
}
-#endif
projects / thirdparty / binutils-gdb.git / blobdiff