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.
This commit is contained in:
Andrew Cagney
parent
74013231d1
commit
5bf970f936
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@ -1,3 +1,15 @@
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2004-09-12 Andrew Cagney <cagney@gnu.org>
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* ppcnbsd-nat.c: Include "inf-ptrace.h".
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(ppcnbsd_fetch_inferior_registers): Rename fetch_inferior_registers.
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(ppcnbsd_store_inferior_registers): Rename store_inferior_registers.
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(_initialize_ppcnbsd_nat): Create and add a NetBSD/PPC ptrace
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target.
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* config/powerpc/nbsd.mh (NATDEPFILES): Replace and inftarg.o with
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inf-ptrace.o and inf-child.o.
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* inf-ptrace.h, inf-ptrace.c, inf-child.h, inf-child.c: New files.
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* Makefile.in: Update dependencies.
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2004-09-11 Andrew Cagney <cagney@gnu.org>
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* language.c (hex_string, hex_string_custom): Move from here ...
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@ -703,9 +703,11 @@ i386_tdep_h = i386-tdep.h
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i387_tdep_h = i387-tdep.h
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ia64_tdep_h = ia64-tdep.h
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infcall_h = infcall.h
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inf_child_h = inf-child.h
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inferior_h = inferior.h $(breakpoint_h) $(target_h) $(frame_h)
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inf_loop_h = inf-loop.h
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inflow_h = inflow.h $(terminal_h)
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inf_ptrace_h = inf-ptrace.h
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infttrace_h = infttrace.h
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interps_h = interps.h
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jv_lang_h = jv-lang.h
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@ -2038,6 +2040,8 @@ infcall.o: infcall.c $(defs_h) $(breakpoint_h) $(target_h) $(regcache_h) \
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$(inferior_h) $(gdb_assert_h) $(block_h) $(gdbcore_h) $(language_h) \
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$(objfiles_h) $(gdbcmd_h) $(command_h) $(gdb_string_h) $(infcall_h) \
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$(dummy_frame_h)
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inf-child.o: inf-child.c $(defs_h) $(regcache_h) $(memattr_h) $(symtab_h) \
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$(target_h) $(inferior_h)
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infcmd.o: infcmd.c $(defs_h) $(gdb_string_h) $(symtab_h) $(gdbtypes_h) \
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$(frame_h) $(inferior_h) $(environ_h) $(value_h) $(gdbcmd_h) \
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$(symfile_h) $(gdbcore_h) $(target_h) $(language_h) $(symfile_h) \
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@ -2049,6 +2053,9 @@ inf-loop.o: inf-loop.c $(defs_h) $(inferior_h) $(target_h) $(event_loop_h) \
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inflow.o: inflow.c $(defs_h) $(frame_h) $(inferior_h) $(command_h) \
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$(serial_h) $(terminal_h) $(target_h) $(gdbthread_h) $(gdb_string_h) \
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$(inflow_h)
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inf-ptrace.o: inf-ptrace.c $(defs_h) $(observer_h) $(gdb_ptrace_h) \
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$(inflow_h) $(inferior_h) $(regcache_h) $(command_h) $(gdbcore_h) \
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$(inf_child_h) $(gdbcmd_h)
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infptrace.o: infptrace.c $(defs_h) $(command_h) $(frame_h) $(gdbcore_h) \
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$(inferior_h) $(regcache_h) $(target_h) $(gdb_assert_h) \
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$(gdb_wait_h) $(gdb_string_h) $(gdb_dirent_h) $(gdb_ptrace_h)
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@ -2284,7 +2291,7 @@ ppc-linux-tdep.o: ppc-linux-tdep.c $(defs_h) $(frame_h) $(inferior_h) \
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$(solib_svr4_h) $(ppc_tdep_h) $(trad_frame_h) $(frame_unwind_h)
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ppcnbsd-nat.o: ppcnbsd-nat.c $(defs_h) $(inferior_h) $(gdb_assert_h) \
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$(gdbcore_h) $(regcache_h) $(bsd_kvm_h) $(ppc_tdep_h) \
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$(ppcnbsd_tdep_h)
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$(ppcnbsd_tdep_h) $(inf_ptrace_h)
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ppcnbsd-tdep.o: ppcnbsd-tdep.c $(defs_h) $(gdbcore_h) $(regcache_h) \
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$(target_h) $(breakpoint_h) $(value_h) $(osabi_h) $(ppc_tdep_h) \
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$(ppcnbsd_tdep_h) $(nbsd_tdep_h) $(tramp_frame_h) $(trad_frame_h) \
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@ -1,5 +1,5 @@
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# Host: PowerPC, running NetBSD
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NATDEPFILES= fork-child.o infptrace.o inftarg.o ppcnbsd-nat.o bsd-kvm.o
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NATDEPFILES= fork-child.o inf-child.o inf-ptrace.o infptrace.o ppcnbsd-nat.o bsd-kvm.o
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NAT_FILE= config/nm-nbsd.h
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LOADLIBES= -lkvm
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|
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@ -0,0 +1,241 @@
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/* Default child (native) target interface, for GDB when running under
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Unix.
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Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
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1998, 1999, 2000, 2001, 2002, 2004 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "regcache.h"
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#include "memattr.h"
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#include "symtab.h"
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#include "target.h"
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#include "inferior.h"
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/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
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for all registers. */
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static void
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inf_child_fetch_inferior_registers (int regnum)
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{
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if (regnum == -1)
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{
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for (regnum = 0; regnum < NUM_REGS; regnum++)
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regcache_raw_supply (current_regcache, regnum, NULL);
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}
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else
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regcache_raw_supply (current_regcache, regnum, NULL);
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}
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/* Store register REGNUM back into the inferior. If REGNUM is -1, do
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this for all registers (including the floating point registers). */
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static void
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inf_child_store_inferior_registers (int regnum)
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{
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}
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void
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inf_child_post_wait (ptid_t ptid, int wait_status)
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{
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/* This version of Unix doesn't require a meaningful "post wait"
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operation.
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*/
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}
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static void
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inf_child_post_attach (int pid)
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{
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/* This version of Unix doesn't require a meaningful "post attach"
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operation by a debugger. */
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}
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/* Get ready to modify the registers array. On machines which store
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individual registers, this doesn't need to do anything. On
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machines which store all the registers in one fell swoop, this
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makes sure that registers contains all the registers from the
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program being debugged. */
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static void
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inf_child_prepare_to_store (void)
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{
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}
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static void
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inf_child_open (char *arg, int from_tty)
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{
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error ("Use the \"run\" command to start a Unix child process.");
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}
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static void
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inf_child_post_startup_inferior (ptid_t ptid)
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{
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/* This version of Unix doesn't require a meaningful "post startup
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inferior" operation by a debugger. */
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}
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static void
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inf_child_acknowledge_created_inferior (int pid)
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{
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/* This version of Unix doesn't require a meaningful "acknowledge
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created inferior" operation by a debugger. */
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}
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static int
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inf_child_insert_fork_catchpoint (int pid)
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{
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/* This version of Unix doesn't support notification of fork
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events. */
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return 0;
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}
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static int
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inf_child_remove_fork_catchpoint (int pid)
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{
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/* This version of Unix doesn't support notification of fork
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events. */
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return 0;
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}
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static int
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inf_child_insert_vfork_catchpoint (int pid)
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{
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/* This version of Unix doesn't support notification of vfork
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events. */
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return 0;
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}
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static int
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inf_child_remove_vfork_catchpoint (int pid)
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{
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/* This version of Unix doesn't support notification of vfork
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events. */
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return 0;
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}
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static int
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inf_child_follow_fork (int follow_child)
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{
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/* This version of Unix doesn't support following fork or vfork
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events. */
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return 0;
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}
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static int
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inf_child_insert_exec_catchpoint (int pid)
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{
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/* This version of Unix doesn't support notification of exec
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events. */
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return 0;
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}
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static int
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inf_child_remove_exec_catchpoint (int pid)
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{
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/* This version of Unix doesn't support notification of exec
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events. */
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return 0;
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}
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static int
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inf_child_reported_exec_events_per_exec_call (void)
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{
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/* This version of Unix doesn't support notification of exec
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events. */
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return 1;
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}
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static int
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inf_child_can_run (void)
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{
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return 1;
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}
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static struct symtab_and_line *
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inf_child_enable_exception_callback (enum exception_event_kind kind,
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int enable)
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{
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return (struct symtab_and_line *) NULL;
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}
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static struct exception_event_record *
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inf_child_get_current_exception_event (void)
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{
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return (struct exception_event_record *) NULL;
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}
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static char *
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inf_child_pid_to_exec_file (int pid)
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{
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/* This version of Unix doesn't support translation of a process ID
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to the filename of the executable file. */
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return NULL;
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}
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static char *
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inf_child_core_file_to_sym_file (char *core)
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{
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/* The target stratum for a running executable need not support this
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operation. */
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return NULL;
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}
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struct target_ops *
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inf_child_target (void)
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{
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struct target_ops *t = XZALLOC (struct target_ops);
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t->to_shortname = "child";
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t->to_longname = "Unix child process";
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t->to_doc = "Unix child process (started by the \"run\" command).";
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t->to_open = inf_child_open;
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t->to_post_attach = inf_child_post_attach;
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t->to_post_wait = inf_child_post_wait;
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t->to_prepare_to_store = inf_child_prepare_to_store;
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t->to_insert_breakpoint = memory_insert_breakpoint;
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t->to_remove_breakpoint = memory_remove_breakpoint;
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t->to_terminal_init = terminal_init_inferior;
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t->to_terminal_inferior = terminal_inferior;
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t->to_terminal_ours_for_output = terminal_ours_for_output;
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t->to_terminal_save_ours = terminal_save_ours;
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t->to_terminal_ours = terminal_ours;
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t->to_terminal_info = child_terminal_info;
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t->to_post_startup_inferior = inf_child_post_startup_inferior;
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t->to_acknowledge_created_inferior = inf_child_acknowledge_created_inferior;
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t->to_insert_fork_catchpoint = inf_child_insert_fork_catchpoint;
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t->to_remove_fork_catchpoint = inf_child_remove_fork_catchpoint;
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t->to_insert_vfork_catchpoint = inf_child_insert_vfork_catchpoint;
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t->to_remove_vfork_catchpoint = inf_child_remove_vfork_catchpoint;
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t->to_follow_fork = inf_child_follow_fork;
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t->to_insert_exec_catchpoint = inf_child_insert_exec_catchpoint;
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t->to_remove_exec_catchpoint = inf_child_remove_exec_catchpoint;
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t->to_reported_exec_events_per_exec_call =
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inf_child_reported_exec_events_per_exec_call;
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t->to_can_run = inf_child_can_run;
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t->to_enable_exception_callback = inf_child_enable_exception_callback;
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t->to_get_current_exception_event = inf_child_get_current_exception_event;
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t->to_pid_to_exec_file = inf_child_pid_to_exec_file;
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t->to_stratum = process_stratum;
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t->to_has_all_memory = 1;
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t->to_has_memory = 1;
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t->to_has_stack = 1;
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t->to_has_registers = 1;
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t->to_has_execution = 1;
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t->to_magic = OPS_MAGIC;
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return t;
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}
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@ -0,0 +1,30 @@
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/* Low level Unix child interface, for GDB when running under Unix.
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|
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Copyright 2004 Free Software Foundation, Inc.
|
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|
||||
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. */
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|
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#ifndef INF_CHILD_H
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#define INF_CHILD_H
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|
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/* Create a prototype child target. The client can override it with
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local methods. */
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extern struct target_ops *inf_child_target (void);
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#endif
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|
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@ -0,0 +1,685 @@
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/* 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 (¤t_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;
|
||||
}
|
||||
|
|
@ -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
|
||||
|
|
@ -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);
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue