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Move code to disable ASR to nat/ 

This patch moves the shared code present on
gdb/linux-nat.c:linux_nat_create_inferior and
gdb/gdbserver/linux-low.c:linux_create_inferior to
nat/linux-personality.c.  This code is responsible for disabling
address space randomization based on user setting, and using
<sys/personality.h> to do that.  I decided to put the prototype of the
maybe_disable_address_space_randomization on nat/linux-osdata.h
because it seemed the best place to put it.

I regression-tested this patch on Fedora 20 x86_64, and found no
regressions.

gdb/ChangeLog
2015-01-15  Sergio Durigan Junior  <sergiodj@redhat.com>

	* Makefile.in (HFILES_NO_SRCDIR): Add nat/linux-personality.h.
	(linux-personality.o): New rule.
	* common/common-defs.h: Include <stdint.h>.
	* config/aarch64/linux.mh (NATDEPFILES): Include
	linux-personality.o.
	* config/alpha/alpha-linux.mh (NATDEPFILES): Likewise.
	* config/arm/linux.mh (NATDEPFILES): Likewise.
	* config/i386/linux64.mh (NATDEPFILES): Likewise.
	* config/i386/linux.mh (NATDEPFILES): Likewise.
	* config/ia64/linux.mh (NATDEPFILES): Likewise.
	* config/m32r/linux.mh (NATDEPFILES): Likewise.
	* config/m68k/linux.mh (NATDEPFILES): Likewise.
	* config/mips/linux.mh (NATDEPFILES): Likewise.
	* config/pa/linux.mh (NATDEPFILES): Likewise.
	* config/powerpc/linux.mh (NATDEPFILES): Likewise.
	* config/powerpc/ppc64-linux.mh (NATDEPFILES): Likewise.
	* config/powerpc/spu-linux.mh (NATDEPFILES): Likewise.
	* config/s390/linux.mh (NATDEPFILES): Likewise.
	* config/sparc/linux64.mh (NATDEPFILES): Likewise.
	* config/sparc/linux.mh (NATDEPFILES): Likewise.
	* config/tilegx/linux.mh (NATDEPFILES): Likewise.
	* config/xtensa/linux.mh (NATDEPFILES): Likewise.
	* defs.h: Remove #include <stdint.h> (moved to
	common/common-defs.h).
	* linux-nat.c: Include nat/linux-personality.h.  Remove #include
	<sys/personality.h>; do not define ADDR_NO_RANDOMIZE (moved to
	nat/linux-personality.c).
	(linux_nat_create_inferior): Remove code to disable address space
	randomization (moved to nat/linux-personality.c).  Create cleanup
	to disable address space randomization.
	* nat/linux-personality.c: New file.
	* nat/linux-personality.h: Likewise.

gdb/gdbserver/ChangeLog
2015-01-15  Sergio Durigan Junior  <sergiodj@redhat.com>

	* Makefile.in (SFILES): Add linux-personality.c.
	(linux-personality.o): New rule.
	* configure.srv (srv_linux_obj): Add linux-personality.o to the
	list of objects to be built.
	* linux-low.c: Include nat/linux-personality.h.
	(linux_create_inferior): Remove code to disable address space
	randomization (moved to ../nat/linux-personality.c).  Create
	cleanup to disable address space randomization.
This commit is contained in:
Sergio Durigan Junior 2015-01-15 15:10:49 -05:00
parent fb23d55442
commit 8cc73a3902
29 changed files with 213 additions and 84 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
gdb/ChangeLog
View File

@ -1,3 +1,38 @@
2015-01-15 Sergio Durigan Junior <sergiodj@redhat.com>
* Makefile.in (HFILES_NO_SRCDIR): Add nat/linux-personality.h.
(linux-personality.o): New rule.
* common/common-defs.h: Include <stdint.h>.
* config/aarch64/linux.mh (NATDEPFILES): Include
linux-personality.o.
* config/alpha/alpha-linux.mh (NATDEPFILES): Likewise.
* config/arm/linux.mh (NATDEPFILES): Likewise.
* config/i386/linux64.mh (NATDEPFILES): Likewise.
* config/i386/linux.mh (NATDEPFILES): Likewise.
* config/ia64/linux.mh (NATDEPFILES): Likewise.
* config/m32r/linux.mh (NATDEPFILES): Likewise.
* config/m68k/linux.mh (NATDEPFILES): Likewise.
* config/mips/linux.mh (NATDEPFILES): Likewise.
* config/pa/linux.mh (NATDEPFILES): Likewise.
* config/powerpc/linux.mh (NATDEPFILES): Likewise.
* config/powerpc/ppc64-linux.mh (NATDEPFILES): Likewise.
* config/powerpc/spu-linux.mh (NATDEPFILES): Likewise.
* config/s390/linux.mh (NATDEPFILES): Likewise.
* config/sparc/linux64.mh (NATDEPFILES): Likewise.
* config/sparc/linux.mh (NATDEPFILES): Likewise.
* config/tilegx/linux.mh (NATDEPFILES): Likewise.
* config/xtensa/linux.mh (NATDEPFILES): Likewise.
* defs.h: Remove #include <stdint.h> (moved to
common/common-defs.h).
* linux-nat.c: Include nat/linux-personality.h. Remove #include
<sys/personality.h>; do not define ADDR_NO_RANDOMIZE (moved to
nat/linux-personality.c).
(linux_nat_create_inferior): Remove code to disable address space
randomization (moved to nat/linux-personality.c). Create cleanup
to disable address space randomization.
* nat/linux-personality.c: New file.
* nat/linux-personality.h: Likewise.
2015-01-15 Sergio Durigan Junior <sergiodj@redhat.com>
* Makefile.in (ALLDEPFILES): Including common/mingw-strerror.c and

6
gdb/Makefile.in
View File

@ -961,7 +961,7 @@ common/print-utils.h common/rsp-low.h nat/x86-dregs.h x86-linux-nat.h \
i386-linux-nat.h common/common-defs.h common/errors.h common/common-types.h \
common/common-debug.h common/cleanups.h common/gdb_setjmp.h \
common/common-exceptions.h target/target.h common/symbol.h \
common/common-regcache.h fbsd-tdep.h
common/common-regcache.h fbsd-tdep.h nat/linux-personality.h
# Header files that already have srcdir in them, or which are in objdir.
@ -2282,6 +2282,10 @@ ppc-linux.o: ${srcdir}/nat/ppc-linux.c
$(COMPILE) $(srcdir)/nat/ppc-linux.c
$(POSTCOMPILE)
linux-personality.o: ${srcdir}/nat/linux-personality.c
$(COMPILE) $(srcdir)/nat/linux-personality.c
$(POSTCOMPILE)
#
# gdb/tui/ dependencies
#

1
gdb/common/common-defs.h
View File

@ -31,6 +31,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <alloca.h>

3
gdb/config/aarch64/linux.mh
View File

@ -21,7 +21,8 @@
NAT_FILE= config/nm-linux.h
NATDEPFILES= inf-ptrace.o fork-child.o aarch64-linux-nat.o \
proc-service.o linux-thread-db.o linux-nat.o linux-fork.o \
linux-procfs.o linux-ptrace.o linux-osdata.o linux-waitpid.o
linux-procfs.o linux-ptrace.o linux-osdata.o linux-waitpid.o \
linux-personality.o
NAT_CDEPS = $(srcdir)/proc-service.list
LOADLIBES= -ldl $(RDYNAMIC)

2
gdb/config/alpha/alpha-linux.mh
View File

@ -3,7 +3,7 @@ NAT_FILE= config/nm-linux.h
NATDEPFILES= inf-ptrace.o alpha-linux-nat.o \
fork-child.o proc-service.o linux-thread-db.o \
linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o linux-ptrace.o \
linux-waitpid.o
linux-waitpid.o linux-personality.o
NAT_CDEPS = $(srcdir)/proc-service.list
# The dynamically loaded libthread_db needs access to symbols in the

2
gdb/config/arm/linux.mh
View File

@ -4,7 +4,7 @@ NAT_FILE= config/nm-linux.h
NATDEPFILES= inf-ptrace.o fork-child.o arm-linux-nat.o \
proc-service.o linux-thread-db.o \
linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o linux-ptrace.o \
linux-waitpid.o
linux-waitpid.o linux-personality.o
NAT_CDEPS = $(srcdir)/proc-service.list
LOADLIBES= -ldl $(RDYNAMIC)

2
gdb/config/i386/linux.mh
View File

@ -5,7 +5,7 @@ NATDEPFILES= inf-ptrace.o fork-child.o \
x86-nat.o x86-dregs.o i386-linux-nat.o x86-linux-nat.o \
proc-service.o linux-thread-db.o \
linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o linux-ptrace.o \
linux-btrace.o linux-waitpid.o
linux-btrace.o linux-waitpid.o linux-personality.o
NAT_CDEPS = $(srcdir)/proc-service.list
# The dynamically loaded libthread_db needs access to symbols in the

2
gdb/config/i386/linux64.mh
View File

@ -5,7 +5,7 @@ NATDEPFILES= inf-ptrace.o fork-child.o \
linux-nat.o linux-osdata.o \
proc-service.o linux-thread-db.o linux-fork.o \
linux-procfs.o linux-ptrace.o linux-btrace.o \
linux-waitpid.o
linux-waitpid.o linux-personality.o
NAT_FILE= config/nm-linux.h
NAT_CDEPS = $(srcdir)/proc-service.list

1
gdb/config/ia64/linux.mh
View File

@ -5,6 +5,7 @@ NATDEPFILES= inf-ptrace.o fork-child.o \
ia64-linux-nat.o \
proc-service.o linux-thread-db.o \
linux-nat.o linux-osdata.o linux-fork.o \
linux-personality.o \
linux-procfs.o linux-ptrace.o linux-waitpid.o
NAT_CDEPS = $(srcdir)/proc-service.list

2
gdb/config/m32r/linux.mh
View File

@ -4,7 +4,7 @@ NAT_FILE= config/nm-linux.h
NATDEPFILES= inf-ptrace.o fork-child.o \
m32r-linux-nat.o proc-service.o linux-thread-db.o \
linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o linux-ptrace.o \
linux-waitpid.o
linux-waitpid.o linux-personality.o
NAT_CDEPS = $(srcdir)/proc-service.list
LOADLIBES= -ldl $(RDYNAMIC)

1
gdb/config/m68k/linux.mh
View File

@ -5,6 +5,7 @@ NATDEPFILES= inf-ptrace.o fork-child.o \
m68klinux-nat.o \
proc-service.o linux-thread-db.o \
linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o linux-ptrace.o \
linux-personality.o \
linux-waitpid.o
NAT_CDEPS = $(srcdir)/proc-service.list

1
gdb/config/mips/linux.mh
View File

@ -4,6 +4,7 @@ NATDEPFILES= inf-ptrace.o fork-child.o mips-linux-nat.o \
linux-thread-db.o proc-service.o \
linux-nat.o linux-osdata.o linux-fork.o \
linux-procfs.o linux-ptrace.o linux-waitpid.o \
linux-personality.o \
mips-linux-watch.o
NAT_CDEPS = $(srcdir)/proc-service.list

3
gdb/config/pa/linux.mh
View File

@ -3,7 +3,8 @@ NAT_FILE= config/nm-linux.h
NATDEPFILES= inf-ptrace.o fork-child.o \
hppa-linux-nat.o proc-service.o linux-thread-db.o \
linux-nat.o linux-osdata.o linux-fork.o \
linux-procfs.o linux-ptrace.o linux-waitpid.o
linux-procfs.o linux-ptrace.o linux-waitpid.o \
linux-personality.o
NAT_CDEPS = $(srcdir)/proc-service.list
LOADLIBES = -ldl $(RDYNAMIC)

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

@ -6,7 +6,7 @@ NAT_FILE= config/nm-linux.h
NATDEPFILES= inf-ptrace.o fork-child.o \
ppc-linux-nat.o proc-service.o linux-thread-db.o \
linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o linux-ptrace.o \
linux-waitpid.o
linux-waitpid.o linux-personality.o
NAT_CDEPS = $(srcdir)/proc-service.list
LOADLIBES = -ldl $(RDYNAMIC)

2
gdb/config/powerpc/ppc64-linux.mh
View File

@ -6,7 +6,7 @@ NAT_FILE= config/nm-linux.h
NATDEPFILES= inf-ptrace.o fork-child.o \
ppc-linux-nat.o proc-service.o linux-thread-db.o \
linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o linux-ptrace.o \
linux-waitpid.o ppc-linux.o
linux-waitpid.o ppc-linux.o linux-personality.o
NAT_CDEPS = $(srcdir)/proc-service.list
# The PowerPC has severe limitations on TOC size, and uses them even

2
gdb/config/powerpc/spu-linux.mh
View File

@ -4,5 +4,5 @@
# PPU side of the Cell BE and debugging the SPU side.
NATDEPFILES = spu-linux-nat.o fork-child.o inf-ptrace.o \
linux-procfs.o linux-ptrace.o linux-waitpid.o
linux-procfs.o linux-ptrace.o linux-waitpid.o linux-personality.o

1
gdb/config/s390/linux.mh
View File

@ -3,6 +3,7 @@ NAT_FILE= config/nm-linux.h
NATDEPFILES= inf-ptrace.o fork-child.o s390-linux-nat.o \
linux-thread-db.o proc-service.o \
linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o linux-ptrace.o \
linux-personality.o \
linux-waitpid.o
NAT_CDEPS = $(srcdir)/proc-service.list
LOADLIBES = -ldl $(RDYNAMIC)

3
gdb/config/sparc/linux.mh
View File

@ -4,7 +4,8 @@ NATDEPFILES= sparc-nat.o sparc-linux-nat.o \
fork-child.o inf-ptrace.o \
proc-service.o linux-thread-db.o \
linux-nat.o linux-osdata.o linux-fork.o \
linux-procfs.o linux-ptrace.o linux-waitpid.o
linux-procfs.o linux-ptrace.o linux-waitpid.o \
linux-personality.o
NAT_CDEPS = $(srcdir)/proc-service.list
# The dynamically loaded libthread_db needs access to symbols in the

3
gdb/config/sparc/linux64.mh
View File

@ -4,7 +4,8 @@ NATDEPFILES= sparc-nat.o sparc64-nat.o sparc64-linux-nat.o \
fork-child.o inf-ptrace.o \
proc-service.o linux-thread-db.o \
linux-nat.o linux-osdata.o linux-fork.o \
linux-procfs.o linux-ptrace.o linux-waitpid.o
linux-procfs.o linux-ptrace.o linux-waitpid.o \
linux-personality.o
NAT_CDEPS = $(srcdir)/proc-service.list
# The dynamically loaded libthread_db needs access to symbols in the

3
gdb/config/tilegx/linux.mh
View File

@ -5,7 +5,8 @@ NATDEPFILES= inf-ptrace.o fork-child.o \
tilegx-linux-nat.o \
proc-service.o linux-thread-db.o \
linux-nat.o linux-osdata.o linux-fork.o \
linux-procfs.o linux-ptrace.o linux-waitpid.o
linux-procfs.o linux-ptrace.o linux-waitpid.o \
linux-personality.o
# The dynamically loaded libthread_db needs access to symbols in the
# gdb executable.

2
gdb/config/xtensa/linux.mh
View File

@ -5,7 +5,7 @@ NAT_FILE= config/nm-linux.h
NATDEPFILES= inf-ptrace.o fork-child.o xtensa-linux-nat.o \
linux-thread-db.o proc-service.o \
linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o linux-ptrace.o \
linux-waitpid.o
linux-waitpid.o linux-personality.o
NAT_CDEPS = $(srcdir)/proc-service.list
LOADLIBES = -ldl $(RDYNAMIC)

1
gdb/defs.h
View File

@ -29,7 +29,6 @@
#include <sys/types.h>
#include <limits.h>
#include <stdint.h>
/* The libdecnumber library, on which GDB depends, includes a header file
called gstdint.h instead of relying directly on stdint.h. GDB, on the

11
gdb/gdbserver/ChangeLog
View File

@ -1,3 +1,14 @@
2015-01-15 Sergio Durigan Junior <sergiodj@redhat.com>
* Makefile.in (SFILES): Add linux-personality.c.
(linux-personality.o): New rule.
* configure.srv (srv_linux_obj): Add linux-personality.o to the
list of objects to be built.
* linux-low.c: Include nat/linux-personality.h.
(linux_create_inferior): Remove code to disable address space
randomization (moved to ../nat/linux-personality.c). Create
cleanup to disable address space randomization.
2015-01-15 Sergio Durigan Junior <sergiodj@redhat.com>
* Makefile.in (posix-strerror.o): New rule.

4
gdb/gdbserver/Makefile.in
View File

@ -167,6 +167,7 @@ SFILES= $(srcdir)/gdbreplay.c $(srcdir)/inferiors.c $(srcdir)/dll.c \
$(srcdir)/common/vec.c $(srcdir)/common/gdb_vecs.c \
$(srcdir)/common/common-utils.c $(srcdir)/common/xml-utils.c \
$(srcdir)/nat/linux-osdata.c $(srcdir)/common/ptid.c \
$(srcdir)/nat/linux-personality.c \
$(srcdir)/common/buffer.c $(srcdir)/nat/linux-btrace.c \
$(srcdir)/common/filestuff.c $(srcdir)/target/waitstatus.c \
$(srcdir)/nat/mips-linux-watch.c $(srcdir)/common/print-utils.c \
@ -590,6 +591,9 @@ mips-linux-watch.o: ../nat/mips-linux-watch.c
ppc-linux.o: ../nat/ppc-linux.c
$(COMPILE) $<
$(POSTCOMPILE)
linux-personality.o: ../nat/linux-personality.c
$(COMPILE) $<
$(POSTCOMPILE)
aarch64.c : $(srcdir)/../regformats/aarch64.dat $(regdat_sh)
$(SHELL) $(regdat_sh) $(srcdir)/../regformats/aarch64.dat aarch64.c

2
gdb/gdbserver/configure.srv
View File

@ -42,7 +42,7 @@ srv_amd64_linux_xmlfiles="i386/amd64-linux.xml i386/amd64-avx-linux.xml i386/amd
# Linux object files. This is so we don't have to repeat
# these files over and over again.
srv_linux_obj="linux-low.o linux-osdata.o linux-procfs.o linux-ptrace.o linux-waitpid.o"
srv_linux_obj="linux-low.o linux-osdata.o linux-procfs.o linux-ptrace.o linux-waitpid.o linux-personality.o"
# Input is taken from the "${target}" variable.

34
gdb/gdbserver/linux-low.c
View File

@ -27,6 +27,7 @@
#include <sys/ptrace.h>
#include "nat/linux-ptrace.h"
#include "nat/linux-procfs.h"
#include "nat/linux-personality.h"
#include <signal.h>
#include <sys/ioctl.h>
#include <fcntl.h>
@ -597,29 +598,11 @@ add_lwp (ptid_t ptid)
static int
linux_create_inferior (char *program, char **allargs)
{
#ifdef HAVE_PERSONALITY
int personality_orig = 0, personality_set = 0;
#endif
struct lwp_info *new_lwp;
int pid;
ptid_t ptid;
#ifdef HAVE_PERSONALITY
if (disable_randomization)
{
errno = 0;
personality_orig = personality (0xffffffff);
if (errno == 0 && !(personality_orig & ADDR_NO_RANDOMIZE))
{
personality_set = 1;
personality (personality_orig | ADDR_NO_RANDOMIZE);
}
if (errno != 0 || (personality_set
&& !(personality (0xffffffff) & ADDR_NO_RANDOMIZE)))
warning ("Error disabling address space randomization: %s",
strerror (errno));
}
#endif
struct cleanup *restore_personality
= maybe_disable_address_space_randomization (disable_randomization);
#if defined(__UCLIBC__) && defined(HAS_NOMMU)
pid = vfork ();
@ -665,16 +648,7 @@ linux_create_inferior (char *program, char **allargs)
_exit (0177);
}
#ifdef HAVE_PERSONALITY
if (personality_set)
{
errno = 0;
personality (personality_orig);
if (errno != 0)
warning ("Error restoring address space randomization: %s",
strerror (errno));
}
#endif
do_cleanups (restore_personality);
linux_add_process (pid, 0);

41
gdb/linux-nat.c
View File

@ -32,6 +32,7 @@
#include "linux-nat.h"
#include "nat/linux-ptrace.h"
#include "nat/linux-procfs.h"
#include "nat/linux-personality.h"
#include "linux-fork.h"
#include "gdbthread.h"
#include "gdbcmd.h"
@ -70,13 +71,6 @@
#define SPUFS_MAGIC 0x23c9b64e
#endif
#ifdef HAVE_PERSONALITY
# include <sys/personality.h>
# if !HAVE_DECL_ADDR_NO_RANDOMIZE
# define ADDR_NO_RANDOMIZE 0x0040000
# endif
#endif /* HAVE_PERSONALITY */
/* This comment documents high-level logic of this file.
Waiting for events in sync mode
@ -1103,45 +1097,18 @@ linux_nat_create_inferior (struct target_ops *ops,
char *exec_file, char *allargs, char **env,
int from_tty)
{
#ifdef HAVE_PERSONALITY
int personality_orig = 0, personality_set = 0;
#endif /* HAVE_PERSONALITY */
struct cleanup *restore_personality
= maybe_disable_address_space_randomization (disable_randomization);
/* The fork_child mechanism is synchronous and calls target_wait, so
we have to mask the async mode. */
#ifdef HAVE_PERSONALITY
if (disable_randomization)
{
errno = 0;
personality_orig = personality (0xffffffff);
if (errno == 0 && !(personality_orig & ADDR_NO_RANDOMIZE))
{
personality_set = 1;
personality (personality_orig | ADDR_NO_RANDOMIZE);
}
if (errno != 0 || (personality_set
&& !(personality (0xffffffff) & ADDR_NO_RANDOMIZE)))
warning (_("Error disabling address space randomization: %s"),
safe_strerror (errno));
}
#endif /* HAVE_PERSONALITY */
/* Make sure we report all signals during startup. */
linux_nat_pass_signals (ops, 0, NULL);
linux_ops->to_create_inferior (ops, exec_file, allargs, env, from_tty);
#ifdef HAVE_PERSONALITY
if (personality_set)
{
errno = 0;
personality (personality_orig);
if (errno != 0)
warning (_("Error restoring address space randomization: %s"),
safe_strerror (errno));
}
#endif /* HAVE_PERSONALITY */
do_cleanups (restore_personality);
}
/* Callback for linux_proc_attach_tgid_threads. Attach to PTID if not

94
gdb/nat/linux-personality.c Normal file
View File

@ -0,0 +1,94 @@
/* Disable address space randomization based on inferior personality.
Copyright (C) 2008-2015 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 3 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, see <http://www.gnu.org/licenses/>. */
#include "common-defs.h"
#include "nat/linux-personality.h"
#ifdef HAVE_PERSONALITY
# include <sys/personality.h>
# ifndef HAVE_DECL_ADDR_NO_RANDOMIZE
# define ADDR_NO_RANDOMIZE 0x0040000
# endif /* ! HAVE_DECL_ADDR_NO_RANDOMIZE */
#endif /* HAVE_PERSONALITY */
#ifdef HAVE_PERSONALITY
/* Restore address space randomization of the inferior. ARG is the
original inferior's personality value before the address space
randomization was disabled. */
static void
restore_personality (void *arg)
{
int personality_orig = (int) (uintptr_t) arg;
errno = 0;
personality (personality_orig);
if (errno != 0)
warning (_("Error restoring address space randomization: %s"),
safe_strerror (errno));
}
#endif /* HAVE_PERSONALITY */
/* Return a cleanup responsible for restoring the inferior's
personality (and restoring the inferior's address space
randomization) if HAVE_PERSONALITY and if PERSONALITY_SET is not
zero; return a null cleanup if not HAVE_PERSONALITY or if
PERSONALITY_SET is zero. */
static struct cleanup *
make_disable_asr_cleanup (int personality_set, int personality_orig)
{
#ifdef HAVE_PERSONALITY
if (personality_set != 0)
return make_cleanup (restore_personality,
(void *) (uintptr_t) personality_orig);
#endif /* HAVE_PERSONALITY */
return make_cleanup (null_cleanup, NULL);
}
/* See comment on nat/linux-personality.h. */
struct cleanup *
maybe_disable_address_space_randomization (int disable_randomization)
{
int personality_orig = 0;
int personality_set = 0;
#ifdef HAVE_PERSONALITY
if (disable_randomization)
{
errno = 0;
personality_orig = personality (0xffffffff);
if (errno == 0 && !(personality_orig & ADDR_NO_RANDOMIZE))
{
personality_set = 1;
personality (personality_orig | ADDR_NO_RANDOMIZE);
}
if (errno != 0 || (personality_set
&& !(personality (0xffffffff) & ADDR_NO_RANDOMIZE)))
warning (_("Error disabling address space randomization: %s"),
safe_strerror (errno));
}
#endif /* HAVE_PERSONALITY */
return make_disable_asr_cleanup (personality_set,
personality_orig);
}

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gdb/nat/linux-personality.h Normal file
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/* Disable address space randomization based on inferior personality.
Copyright (C) 2008-2015 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 3 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, see <http://www.gnu.org/licenses/>. */
#ifndef NAT_LINUX_PERSONALITY_H
#define NAT_LINUX_PERSONALITY_H
/* Disable the inferior's address space randomization if
DISABLE_RANDOMIZATION is not zero and if we have
<sys/personality.h>. Return a cleanup which, when called, will
re-enable the inferior's address space randomization. */
extern struct cleanup *maybe_disable_address_space_randomization
(int disable_randomization);
#endif /* ! NAT_LINUX_PERSONALITY_H */