mirror/binutils-gdb
2
0
Fork 0
mirror of https://sourceware.org/git/binutils-gdb.git synced 2024-11-27 03:51:15 +08:00
Code Issues Packages Projects Releases Wiki Activity

2004-09-12 Andrew Cagney <cagney@gnu.org>

Browse Source 
* ppcnbsd-nat.c: Include "inf-ptrace.h".
	(ppcnbsd_fetch_inferior_registers): Rename fetch_inferior_registers.
	(ppcnbsd_store_inferior_registers): Rename store_inferior_registers.
	(_initialize_ppcnbsd_nat): Create and add a NetBSD/PPC ptrace
	target.
	* config/powerpc/nbsd.mh (NATDEPFILES): Replace and inftarg.o with
	inf-ptrace.o and inf-child.o.
	* inf-ptrace.h, inf-ptrace.c, inf-child.h, inf-child.c: New files.
	* Makefile.in: Update dependencies.
This commit is contained in:
Andrew Cagney 2004-09-12 13:04:41 +00:00
parent 74013231d1
commit 5bf970f936
8 changed files with 1020 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
gdb/ChangeLog
View File

@ -1,3 +1,15 @@
2004-09-12 Andrew Cagney <cagney@gnu.org>
* ppcnbsd-nat.c: Include "inf-ptrace.h".
(ppcnbsd_fetch_inferior_registers): Rename fetch_inferior_registers.
(ppcnbsd_store_inferior_registers): Rename store_inferior_registers.
(_initialize_ppcnbsd_nat): Create and add a NetBSD/PPC ptrace
target.
* config/powerpc/nbsd.mh (NATDEPFILES): Replace and inftarg.o with
inf-ptrace.o and inf-child.o.
* inf-ptrace.h, inf-ptrace.c, inf-child.h, inf-child.c: New files.
* Makefile.in: Update dependencies.
2004-09-11 Andrew Cagney <cagney@gnu.org>
* language.c (hex_string, hex_string_custom): Move from here ...

9
gdb/Makefile.in
View File

@ -703,9 +703,11 @@ i386_tdep_h = i386-tdep.h
i387_tdep_h = i387-tdep.h
ia64_tdep_h = ia64-tdep.h
infcall_h = infcall.h
inf_child_h = inf-child.h
inferior_h = inferior.h $(breakpoint_h) $(target_h) $(frame_h)
inf_loop_h = inf-loop.h
inflow_h = inflow.h $(terminal_h)
inf_ptrace_h = inf-ptrace.h
infttrace_h = infttrace.h
interps_h = interps.h
jv_lang_h = jv-lang.h
@ -2038,6 +2040,8 @@ infcall.o: infcall.c $(defs_h) $(breakpoint_h) $(target_h) $(regcache_h) \
$(inferior_h) $(gdb_assert_h) $(block_h) $(gdbcore_h) $(language_h) \
$(objfiles_h) $(gdbcmd_h) $(command_h) $(gdb_string_h) $(infcall_h) \
$(dummy_frame_h)
inf-child.o: inf-child.c $(defs_h) $(regcache_h) $(memattr_h) $(symtab_h) \
$(target_h) $(inferior_h)
infcmd.o: infcmd.c $(defs_h) $(gdb_string_h) $(symtab_h) $(gdbtypes_h) \
$(frame_h) $(inferior_h) $(environ_h) $(value_h) $(gdbcmd_h) \
$(symfile_h) $(gdbcore_h) $(target_h) $(language_h) $(symfile_h) \
@ -2049,6 +2053,9 @@ inf-loop.o: inf-loop.c $(defs_h) $(inferior_h) $(target_h) $(event_loop_h) \
inflow.o: inflow.c $(defs_h) $(frame_h) $(inferior_h) $(command_h) \
$(serial_h) $(terminal_h) $(target_h) $(gdbthread_h) $(gdb_string_h) \
$(inflow_h)
inf-ptrace.o: inf-ptrace.c $(defs_h) $(observer_h) $(gdb_ptrace_h) \
$(inflow_h) $(inferior_h) $(regcache_h) $(command_h) $(gdbcore_h) \
$(inf_child_h) $(gdbcmd_h)
infptrace.o: infptrace.c $(defs_h) $(command_h) $(frame_h) $(gdbcore_h) \
$(inferior_h) $(regcache_h) $(target_h) $(gdb_assert_h) \
$(gdb_wait_h) $(gdb_string_h) $(gdb_dirent_h) $(gdb_ptrace_h)
@ -2284,7 +2291,7 @@ ppc-linux-tdep.o: ppc-linux-tdep.c $(defs_h) $(frame_h) $(inferior_h) \
$(solib_svr4_h) $(ppc_tdep_h) $(trad_frame_h) $(frame_unwind_h)
ppcnbsd-nat.o: ppcnbsd-nat.c $(defs_h) $(inferior_h) $(gdb_assert_h) \
$(gdbcore_h) $(regcache_h) $(bsd_kvm_h) $(ppc_tdep_h) \
$(ppcnbsd_tdep_h)
$(ppcnbsd_tdep_h) $(inf_ptrace_h)
ppcnbsd-tdep.o: ppcnbsd-tdep.c $(defs_h) $(gdbcore_h) $(regcache_h) \
$(target_h) $(breakpoint_h) $(value_h) $(osabi_h) $(ppc_tdep_h) \
$(ppcnbsd_tdep_h) $(nbsd_tdep_h) $(tramp_frame_h) $(trad_frame_h) \

2
gdb/config/powerpc/nbsd.mh
View File

@ -1,5 +1,5 @@
# Host: PowerPC, running NetBSD
NATDEPFILES= fork-child.o infptrace.o inftarg.o ppcnbsd-nat.o bsd-kvm.o
NATDEPFILES= fork-child.o inf-child.o inf-ptrace.o infptrace.o ppcnbsd-nat.o bsd-kvm.o
NAT_FILE= config/nm-nbsd.h
LOADLIBES= -lkvm

241
gdb/inf-child.c Normal file
View File

@ -0,0 +1,241 @@
/* Default child (native) target interface, for GDB when running under
Unix.
Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
1998, 1999, 2000, 2001, 2002, 2004 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. */
#include "defs.h"
#include "regcache.h"
#include "memattr.h"
#include "symtab.h"
#include "target.h"
#include "inferior.h"
/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
for all registers. */
static void
inf_child_fetch_inferior_registers (int regnum)
{
if (regnum == -1)
{
for (regnum = 0; regnum < NUM_REGS; regnum++)
regcache_raw_supply (current_regcache, regnum, NULL);
}
else
regcache_raw_supply (current_regcache, regnum, NULL);
}
/* Store register REGNUM back into the inferior. If REGNUM is -1, do
this for all registers (including the floating point registers). */
static void
inf_child_store_inferior_registers (int regnum)
{
}
void
inf_child_post_wait (ptid_t ptid, int wait_status)
{
/* This version of Unix doesn't require a meaningful "post wait"
operation.
*/
}
static void
inf_child_post_attach (int pid)
{
/* This version of Unix doesn't require a meaningful "post attach"
operation by a debugger. */
}
/* Get ready to modify the registers array. On machines which store
individual registers, this doesn't need to do anything. On
machines which store all the registers in one fell swoop, this
makes sure that registers contains all the registers from the
program being debugged. */
static void
inf_child_prepare_to_store (void)
{
}
static void
inf_child_open (char *arg, int from_tty)
{
error ("Use the \"run\" command to start a Unix child process.");
}
static void
inf_child_post_startup_inferior (ptid_t ptid)
{
/* This version of Unix doesn't require a meaningful "post startup
inferior" operation by a debugger. */
}
static void
inf_child_acknowledge_created_inferior (int pid)
{
/* This version of Unix doesn't require a meaningful "acknowledge
created inferior" operation by a debugger. */
}
static int
inf_child_insert_fork_catchpoint (int pid)
{
/* This version of Unix doesn't support notification of fork
events. */
return 0;
}
static int
inf_child_remove_fork_catchpoint (int pid)
{
/* This version of Unix doesn't support notification of fork
events. */
return 0;
}
static int
inf_child_insert_vfork_catchpoint (int pid)
{
/* This version of Unix doesn't support notification of vfork
events. */
return 0;
}
static int
inf_child_remove_vfork_catchpoint (int pid)
{
/* This version of Unix doesn't support notification of vfork
events. */
return 0;
}
static int
inf_child_follow_fork (int follow_child)
{
/* This version of Unix doesn't support following fork or vfork
events. */
return 0;
}
static int
inf_child_insert_exec_catchpoint (int pid)
{
/* This version of Unix doesn't support notification of exec
events. */
return 0;
}
static int
inf_child_remove_exec_catchpoint (int pid)
{
/* This version of Unix doesn't support notification of exec
events. */
return 0;
}
static int
inf_child_reported_exec_events_per_exec_call (void)
{
/* This version of Unix doesn't support notification of exec
events. */
return 1;
}
static int
inf_child_can_run (void)
{
return 1;
}
static struct symtab_and_line *
inf_child_enable_exception_callback (enum exception_event_kind kind,
int enable)
{
return (struct symtab_and_line *) NULL;
}
static struct exception_event_record *
inf_child_get_current_exception_event (void)
{
return (struct exception_event_record *) NULL;
}
static char *
inf_child_pid_to_exec_file (int pid)
{
/* This version of Unix doesn't support translation of a process ID
to the filename of the executable file. */
return NULL;
}
static char *
inf_child_core_file_to_sym_file (char *core)
{
/* The target stratum for a running executable need not support this
operation. */
return NULL;
}
struct target_ops *
inf_child_target (void)
{
struct target_ops *t = XZALLOC (struct target_ops);
t->to_shortname = "child";
t->to_longname = "Unix child process";
t->to_doc = "Unix child process (started by the \"run\" command).";
t->to_open = inf_child_open;
t->to_post_attach = inf_child_post_attach;
t->to_post_wait = inf_child_post_wait;
t->to_prepare_to_store = inf_child_prepare_to_store;
t->to_insert_breakpoint = memory_insert_breakpoint;
t->to_remove_breakpoint = memory_remove_breakpoint;
t->to_terminal_init = terminal_init_inferior;
t->to_terminal_inferior = terminal_inferior;
t->to_terminal_ours_for_output = terminal_ours_for_output;
t->to_terminal_save_ours = terminal_save_ours;
t->to_terminal_ours = terminal_ours;
t->to_terminal_info = child_terminal_info;
t->to_post_startup_inferior = inf_child_post_startup_inferior;
t->to_acknowledge_created_inferior = inf_child_acknowledge_created_inferior;
t->to_insert_fork_catchpoint = inf_child_insert_fork_catchpoint;
t->to_remove_fork_catchpoint = inf_child_remove_fork_catchpoint;
t->to_insert_vfork_catchpoint = inf_child_insert_vfork_catchpoint;
t->to_remove_vfork_catchpoint = inf_child_remove_vfork_catchpoint;
t->to_follow_fork = inf_child_follow_fork;
t->to_insert_exec_catchpoint = inf_child_insert_exec_catchpoint;
t->to_remove_exec_catchpoint = inf_child_remove_exec_catchpoint;
t->to_reported_exec_events_per_exec_call =
inf_child_reported_exec_events_per_exec_call;
t->to_can_run = inf_child_can_run;
t->to_enable_exception_callback = inf_child_enable_exception_callback;
t->to_get_current_exception_event = inf_child_get_current_exception_event;
t->to_pid_to_exec_file = inf_child_pid_to_exec_file;
t->to_stratum = process_stratum;
t->to_has_all_memory = 1;
t->to_has_memory = 1;
t->to_has_stack = 1;
t->to_has_registers = 1;
t->to_has_execution = 1;
t->to_magic = OPS_MAGIC;
return t;
}

30
gdb/inf-child.h Normal file
View File

@ -0,0 +1,30 @@
/* Low level Unix child interface, for GDB when running under Unix.
Copyright 2004 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. */
#ifndef INF_CHILD_H
#define INF_CHILD_H
/* Create a prototype child target. The client can override it with
local methods. */
extern struct target_ops *inf_child_target (void);
#endif

685
gdb/inf-ptrace.c Normal file
View File

@ -0,0 +1,685 @@
/* Low level Unix child interface to ptrace, for GDB when running under Unix.
Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
1998, 1999, 2000, 2001, 2002, 2004 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. */
#include "defs.h"
#include "observer.h"
#include "gdb_ptrace.h"
#include "inflow.h"
#include "inferior.h"
#include "regcache.h"
#include "command.h"
#include "gdbcore.h"
#include "inf-child.h"
#include "gdbcmd.h"
#include <sys/wait.h>
#include <signal.h>
/* HACK: Save the ptrace ops returned by ptrace_target. */
static struct target_ops *ptrace_ops_hack;
static void
inf_ptrace_kill_inferior (void)
{
int status;
int pid = PIDGET (inferior_ptid);
if (pid == 0)
return;
/* This once used to call "kill" to kill the inferior just in case
the inferior was still running. As others have noted in the past
(kingdon) there shouldn't be any way to get here if the inferior
is still running -- else there's a major problem elsewere in gdb
and it needs to be fixed.
The kill call causes problems under hpux10, so it's been removed;
if this causes problems we'll deal with them as they arise. */
call_ptrace (PT_KILL, pid, (PTRACE_TYPE_ARG3) 0, 0);
ptrace_wait (null_ptid, &status);
target_mourn_inferior ();
}
/* Resume execution of the inferior process. If STEP is nonzero,
single-step it. If SIGNAL is nonzero, give it that signal. */
static void
inf_ptrace_resume (ptid_t ptid, int step, enum target_signal signal)
{
int request = PT_CONTINUE;
int pid = PIDGET (ptid);
if (pid == -1)
/* Resume all threads. */
/* I think this only gets used in the non-threaded case, where
"resume all threads" and "resume inferior_ptid" are the
same. */
pid = PIDGET (inferior_ptid);
if (step)
{
/* If this system does not support PT_STEP, a higher level
function will have called single_step() to transmute the step
request into a continue request (by setting breakpoints on
all possible successor instructions), so we don't have to
worry about that here. */
request = PT_STEP;
}
/* An address of (PTRACE_TYPE_ARG3)1 tells ptrace to continue from
where it was. If GDB wanted it to start some other way, we have
already written a new PC value to the child. */
errno = 0;
ptrace (request, pid, (PTRACE_TYPE_ARG3) 1, target_signal_to_host (signal));
if (errno != 0)
perror_with_name ("ptrace");
}
/* Set an upper limit on alloca. */
#define GDB_MAX_ALLOCA 0x1000
/* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory
in the NEW_SUN_PTRACE case. It ought to be straightforward. But
it appears that writing did not write the data that I specified. I
cannot understand where it got the data that it actually did
write. */
/* Copy LEN bytes to or from inferior's memory starting at MEMADDR to
debugger memory starting at MYADDR. Copy to inferior if WRITE is
nonzero. TARGET is ignored.
Returns the length copied, which is either the LEN argument or
zero. This xfer function does not do partial moves, since
ptrace_ops_hack doesn't allow memory operations to cross below us in the
target stack anyway. */
int
inf_ptrace_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write,
struct mem_attrib *attrib, struct target_ops *target)
{
int i;
/* Round starting address down to longword boundary. */
CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_TYPE_RET);
/* Round ending address up; get number of longwords that makes. */
int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1)
/ sizeof (PTRACE_TYPE_RET));
int alloc = count * sizeof (PTRACE_TYPE_RET);
PTRACE_TYPE_RET *buffer;
struct cleanup *old_chain = NULL;
#ifdef PT_IO
/* OpenBSD 3.1, NetBSD 1.6 and FreeBSD 5.0 have a new PT_IO request
that promises to be much more efficient in reading and writing
data in the traced process's address space. */
{
struct ptrace_io_desc piod;
/* NOTE: We assume that there are no distinct address spaces for
instruction and data. */
piod.piod_op = write ? PIOD_WRITE_D : PIOD_READ_D;
piod.piod_offs = (void *) memaddr;
piod.piod_addr = myaddr;
piod.piod_len = len;
if (ptrace (PT_IO, PIDGET (inferior_ptid), (caddr_t) & piod, 0) == -1)
{
/* If the PT_IO request is somehow not supported, fallback on
using PT_WRITE_D/PT_READ_D. Otherwise we will return zero
to indicate failure. */
if (errno != EINVAL)
return 0;
}
else
{
/* Return the actual number of bytes read or written. */
return piod.piod_len;
}
}
#endif
/* Allocate buffer of that many longwords. */
if (len < GDB_MAX_ALLOCA)
{
buffer = (PTRACE_TYPE_RET *) alloca (alloc);
}
else
{
buffer = (PTRACE_TYPE_RET *) xmalloc (alloc);
old_chain = make_cleanup (xfree, buffer);
}
if (write)
{
/* Fill start and end extra bytes of buffer with existing memory
data. */
if (addr != memaddr || len < (int) sizeof (PTRACE_TYPE_RET))
{
/* Need part of initial word -- fetch it. */
buffer[0] = ptrace (PT_READ_I, PIDGET (inferior_ptid),
(PTRACE_TYPE_ARG3) addr, 0);
}
if (count > 1) /* FIXME, avoid if even boundary. */
{
buffer[count - 1] =
ptrace (PT_READ_I, PIDGET (inferior_ptid),
((PTRACE_TYPE_ARG3)
(addr + (count - 1) * sizeof (PTRACE_TYPE_RET))), 0);
}
/* Copy data to be written over corresponding part of buffer. */
memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)),
myaddr, len);
/* Write the entire buffer. */
for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET))
{
errno = 0;
ptrace (PT_WRITE_D, PIDGET (inferior_ptid),
(PTRACE_TYPE_ARG3) addr, buffer[i]);
if (errno)
{
/* Using the appropriate one (I or D) is necessary for
Gould NP1, at least. */
errno = 0;
ptrace (PT_WRITE_I, PIDGET (inferior_ptid),
(PTRACE_TYPE_ARG3) addr, buffer[i]);
}
if (errno)
return 0;
}
}
else
{
/* Read all the longwords. */
for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET))
{
errno = 0;
buffer[i] = ptrace (PT_READ_I, PIDGET (inferior_ptid),
(PTRACE_TYPE_ARG3) addr, 0);
if (errno)
return 0;
QUIT;
}
/* Copy appropriate bytes out of the buffer. */
memcpy (myaddr,
(char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)),
len);
}
if (old_chain != NULL)
do_cleanups (old_chain);
return len;
}
/* Wait for child to do something. Return pid of child, or -1 in case
of error; store status through argument pointer OURSTATUS. */
static ptid_t
inf_ptrace_wait (ptid_t ptid, struct target_waitstatus *ourstatus)
{
int save_errno;
int status;
char *execd_pathname = NULL;
int exit_status;
int related_pid;
int syscall_id;
enum target_waitkind kind;
int pid;
do
{
set_sigint_trap (); /* Causes SIGINT to be passed on to the
attached process. */
set_sigio_trap ();
pid = ptrace_wait (inferior_ptid, &status);
save_errno = errno;
clear_sigio_trap ();
clear_sigint_trap ();
if (pid == -1)
{
if (save_errno == EINTR)
continue;
fprintf_unfiltered (gdb_stderr,
"Child process unexpectedly missing: %s.\n",
safe_strerror (save_errno));
/* Claim it exited with unknown signal. */
ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
return pid_to_ptid (-1);
}
/* Did it exit?
*/
if (target_has_exited (pid, status, &exit_status))
{
/* ??rehrauer: For now, ignore this. */
continue;
}
if (!target_thread_alive (pid_to_ptid (pid)))
{
ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
return pid_to_ptid (pid);
}
}
while (pid != PIDGET (inferior_ptid)); /* Some other child died or stopped */
store_waitstatus (ourstatus, status);
return pid_to_ptid (pid);
}
void
inf_ptrace_post_wait (ptid_t ptid, int wait_status)
{
/* This version of Unix doesn't require a meaningful "post wait"
operation.
*/
}
/* Check to see if the given thread is alive.
FIXME: Is kill() ever the right way to do this? I doubt it, but
for now we're going to try and be compatable with the old thread
code. */
static int
inf_ptrace_thread_alive (ptid_t ptid)
{
pid_t pid = PIDGET (ptid);
return (kill (pid, 0) != -1);
}
/* Attach to process PID, then initialize for debugging it. */
static void
inf_ptrace_attach (char *args, int from_tty)
{
char *exec_file;
int pid;
char *dummy;
if (!args)
error_no_arg ("process-id to attach");
dummy = args;
pid = strtol (args, &dummy, 0);
/* Some targets don't set errno on errors, grrr! */
if ((pid == 0) && (args == dummy))
error ("Illegal process-id: %s\n", args);
if (pid == getpid ()) /* Trying to masturbate? */
error ("I refuse to debug myself!");
if (from_tty)
{
exec_file = (char *) get_exec_file (0);
if (exec_file)
printf_unfiltered ("Attaching to program: %s, %s\n", exec_file,
target_pid_to_str (pid_to_ptid (pid)));
else
printf_unfiltered ("Attaching to %s\n",
target_pid_to_str (pid_to_ptid (pid)));
gdb_flush (gdb_stdout);
}
attach (pid);
inferior_ptid = pid_to_ptid (pid);
push_target (ptrace_ops_hack);
}
static void
inf_ptrace_post_attach (int pid)
{
/* This version of Unix doesn't require a meaningful "post attach"
operation by a debugger. */
}
/* Take a program previously attached to and detaches it. The program
resumes execution and will no longer stop on signals, etc. We'd
better not have left any breakpoints in the program or it'll die
when it hits one. For this to work, it may be necessary for the
process to have been previously attached. It *might* work if the
program was started via the normal ptrace (PTRACE_TRACEME). */
static void
inf_ptrace_detach (char *args, int from_tty)
{
int siggnal = 0;
int pid = PIDGET (inferior_ptid);
if (from_tty)
{
char *exec_file = get_exec_file (0);
if (exec_file == 0)
exec_file = "";
printf_unfiltered ("Detaching from program: %s, %s\n", exec_file,
target_pid_to_str (pid_to_ptid (pid)));
gdb_flush (gdb_stdout);
}
if (args)
siggnal = atoi (args);
detach (siggnal);
inferior_ptid = null_ptid;
unpush_target (ptrace_ops_hack);
}
/* Get ready to modify the registers array. On machines which store
individual registers, this doesn't need to do anything. On
machines which store all the registers in one fell swoop, this
makes sure that registers contains all the registers from the
program being debugged. */
static void
inf_ptrace_prepare_to_store (void)
{
}
/* Print status information about what we're accessing. */
static void
inf_ptrace_files_info (struct target_ops *ignore)
{
printf_unfiltered ("\tUsing the running image of %s %s.\n",
attach_flag ? "attached" : "child",
target_pid_to_str (inferior_ptid));
}
static void
inf_ptrace_open (char *arg, int from_tty)
{
error ("Use the \"run\" command to start a Unix child process.");
}
/* Stub function which causes the inferior that runs it, to be ptrace-able
by its parent process. */
static void
inf_ptrace_me (void)
{
/* "Trace me, Dr. Memory!" */
call_ptrace (0, 0, (PTRACE_TYPE_ARG3) 0, 0);
}
/* Stub function which causes the GDB that runs it, to start ptrace-ing
the child process. */
static void
inf_ptrace_him (int pid)
{
push_target (ptrace_ops_hack);
/* On some targets, there must be some explicit synchronization
between the parent and child processes after the debugger
forks, and before the child execs the debuggee program. This
call basically gives permission for the child to exec.
*/
target_acknowledge_created_inferior (pid);
/* START_INFERIOR_TRAPS_EXPECTED is defined in inferior.h,
* and will be 1 or 2 depending on whether we're starting
* without or with a shell.
*/
startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
/* On some targets, there must be some explicit actions taken after
the inferior has been started up.
*/
target_post_startup_inferior (pid_to_ptid (pid));
}
/* Start an inferior Unix child process and sets inferior_ptid to its
pid. EXEC_FILE is the file to run. ALLARGS is a string containing
the arguments to the program. ENV is the environment vector to
pass. Errors reported with error(). */
static void
inf_ptrace_create_inferior (char *exec_file, char *allargs, char **env,
int from_tty)
{
fork_inferior (exec_file, allargs, env, inf_ptrace_me, inf_ptrace_him,
NULL, NULL);
/* We are at the first instruction we care about. */
observer_notify_inferior_created (&current_target, from_tty);
/* Pedal to the metal... */
proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
}
static void
inf_ptrace_post_startup_inferior (ptid_t ptid)
{
/* This version of Unix doesn't require a meaningful "post startup inferior"
operation by a debugger.
*/
}
static void
inf_ptrace_acknowledge_created_inferior (int pid)
{
/* This version of Unix doesn't require a meaningful "acknowledge created inferior"
operation by a debugger.
*/
}
static int
inf_ptrace_insert_fork_catchpoint (int pid)
{
/* This version of Unix doesn't support notification of fork events. */
return 0;
}
static int
inf_ptrace_remove_fork_catchpoint (int pid)
{
/* This version of Unix doesn't support notification of fork events. */
return 0;
}
static int
inf_ptrace_insert_vfork_catchpoint (int pid)
{
/* This version of Unix doesn't support notification of vfork events. */
return 0;
}
static int
inf_ptrace_remove_vfork_catchpoint (int pid)
{
/* This version of Unix doesn't support notification of vfork events. */
return 0;
}
static int
inf_ptrace_follow_fork (int follow_child)
{
/* This version of Unix doesn't support following fork or vfork events. */
return 0;
}
static int
inf_ptrace_insert_exec_catchpoint (int pid)
{
/* This version of Unix doesn't support notification of exec events. */
return 0;
}
static int
inf_ptrace_remove_exec_catchpoint (int pid)
{
/* This version of Unix doesn't support notification of exec events. */
return 0;
}
static int
inf_ptrace_reported_exec_events_per_exec_call (void)
{
/* This version of Unix doesn't support notification of exec events.
*/
return 1;
}
static int
inf_ptrace_has_exited (int pid, int wait_status, int *exit_status)
{
if (WIFEXITED (wait_status))
{
*exit_status = WEXITSTATUS (wait_status);
return 1;
}
if (WIFSIGNALED (wait_status))
{
*exit_status = 0; /* ?? Don't know what else to say here. */
return 1;
}
/* ?? Do we really need to consult the event state, too? Assume the
wait_state alone suffices.
*/
return 0;
}
static void
inf_ptrace_mourn_inferior (void)
{
unpush_target (ptrace_ops_hack);
generic_mourn_inferior ();
}
static int
inf_ptrace_can_run (void)
{
return 1;
}
/* Send a SIGINT to the process group. This acts just like the user
typed a ^C on the controlling terminal.
XXX - This may not be correct for all systems. Some may want to
use killpg() instead of kill (-pgrp). */
static void
inf_ptrace_stop (void)
{
kill (-inferior_process_group, SIGINT);
}
/* Perform a partial transfer to/from the specified object. For
memory transfers, fall back to the old memory xfer functions. */
static LONGEST
inf_ptrace_xfer_partial (struct target_ops *ops, enum target_object object,
const char *annex, void *readbuf,
const void *writebuf, ULONGEST offset, LONGEST len)
{
switch (object)
{
case TARGET_OBJECT_MEMORY:
if (readbuf)
return inf_ptrace_xfer_memory (offset, readbuf, len, 0 /*write */ ,
NULL, ops);
if (writebuf)
return inf_ptrace_xfer_memory (offset, readbuf, len, 1 /*write */ ,
NULL, ops);
return -1;
case TARGET_OBJECT_UNWIND_TABLE:
return -1;
case TARGET_OBJECT_AUXV:
return -1;
case TARGET_OBJECT_WCOOKIE:
return -1;
default:
return -1;
}
}
static char *
inf_ptrace_pid_to_str (ptid_t ptid)
{
return normal_pid_to_str (ptid);
}
struct target_ops *
inf_ptrace_target (void)
{
struct target_ops *t = inf_child_target ();
t->to_open = inf_ptrace_open;
t->to_attach = inf_ptrace_attach;
t->to_post_attach = inf_ptrace_post_attach;
t->to_detach = inf_ptrace_detach;
t->to_resume = inf_ptrace_resume;
t->to_wait = inf_ptrace_wait;
t->to_post_wait = inf_ptrace_post_wait;
t->to_prepare_to_store = inf_ptrace_prepare_to_store;
t->to_xfer_memory = inf_ptrace_xfer_memory;
t->to_xfer_partial = inf_ptrace_xfer_partial;
t->to_files_info = inf_ptrace_files_info;
t->to_kill = inf_ptrace_kill_inferior;
t->to_create_inferior = inf_ptrace_create_inferior;
t->to_post_startup_inferior = inf_ptrace_post_startup_inferior;
t->to_acknowledge_created_inferior =
inf_ptrace_acknowledge_created_inferior;
t->to_insert_fork_catchpoint = inf_ptrace_insert_fork_catchpoint;
t->to_remove_fork_catchpoint = inf_ptrace_remove_fork_catchpoint;
t->to_insert_vfork_catchpoint = inf_ptrace_insert_vfork_catchpoint;
t->to_remove_vfork_catchpoint = inf_ptrace_remove_vfork_catchpoint;
t->to_follow_fork = inf_ptrace_follow_fork;
t->to_insert_exec_catchpoint = inf_ptrace_insert_exec_catchpoint;
t->to_remove_exec_catchpoint = inf_ptrace_remove_exec_catchpoint;
t->to_reported_exec_events_per_exec_call =
inf_ptrace_reported_exec_events_per_exec_call;
t->to_has_exited = inf_ptrace_has_exited;
t->to_mourn_inferior = inf_ptrace_mourn_inferior;
t->to_can_run = inf_ptrace_can_run;
t->to_thread_alive = inf_ptrace_thread_alive;
t->to_pid_to_str = inf_ptrace_pid_to_str;
t->to_stop = inf_ptrace_stop;
t->to_stratum = process_stratum;
t->to_has_all_memory = 1;
t->to_has_memory = 1;
t->to_has_stack = 1;
t->to_has_registers = 1;
t->to_has_execution = 1;
t->to_magic = OPS_MAGIC;
ptrace_ops_hack = t;
return t;
}

31
gdb/inf-ptrace.h Normal file
View File

@ -0,0 +1,31 @@
/* Low level Unix child interface to ptrace, for GDB when running
under Unix.
Copyright 2004 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. */
#ifndef INF_PTRACE_H
#define INF_PTRACE_H
/* Create a prototype ptrace target. The client can override it with
local methods. */
extern struct target_ops *inf_ptrace_target (void);
#endif

16
gdb/ppcnbsd-nat.c
View File

@ -35,6 +35,8 @@
#include "ppc-tdep.h"
#include "ppcnbsd-tdep.h"
#include "inf-ptrace.h"
/* Returns true if PT_GETREGS fetches this register. */
static int
getregs_supplies (int regno)
@ -73,8 +75,8 @@ getfpregs_supplies (int regno)
|| regno == tdep->ppc_fpscr_regnum);
}
void
fetch_inferior_registers (int regno)
static void
ppcnbsd_fetch_inferior_registers (int regno)
{
if (regno == -1 || getregs_supplies (regno))
{
@ -103,8 +105,8 @@ fetch_inferior_registers (int regno)
}
}
void
store_inferior_registers (int regno)
static void
ppcnbsd_store_inferior_registers (int regno)
{
if (regno == -1 || getregs_supplies (regno))
{
@ -177,6 +179,12 @@ void _initialize_ppcnbsd_nat (void);
void
_initialize_ppcnbsd_nat (void)
{
struct target_ops *t;
/* Support debugging kernel virtual memory images. */
bsd_kvm_add_target (ppcnbsd_supply_pcb);
/* Add in local overrides. */
t = inf_ptrace_target ();
t->to_fetch_registers = ppcnbsd_fetch_inferior_registers;
t->to_store_registers = ppcnbsd_store_inferior_registers;
add_target (t);
}