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am 416695a7: Merge "Improve personality initialization"

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* commit '416695a75c3892dd709a80ea8a640da07082594e':
  Improve personality initialization
This commit is contained in:
Dmitriy Ivanov 2015-07-01 02:36:04 +00:00 committed by Android Git Automerger
commit 7830dcf1b5
4 changed files with 19 additions and 9 deletions
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17
libc/bionic/libc_init_common.cpp
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@ -37,6 +37,7 @@
#include <stdlib.h>
#include <string.h>
#include <sys/auxv.h>
#include <sys/personality.h>
#include <sys/time.h>
#include <unistd.h>
@ -44,6 +45,7 @@
#include "private/bionic_ssp.h"
#include "private/bionic_tls.h"
#include "private/KernelArgumentBlock.h"
#include "private/libc_logging.h"
#include "pthread_internal.h"
extern "C" abort_msg_t** __abort_message_ptr;
@ -289,6 +291,19 @@ static void __sanitize_environment_variables(char** env) {
dst[0] = nullptr;
}
static void __initialize_personality() {
#if !defined(__LP64__)
int old_value = personality(0xffffffff);
if (old_value == -1) {
__libc_fatal("error getting old personality value: %s", strerror(errno));
}
if (personality((static_cast<unsigned int>(old_value) & ~PER_MASK) | PER_LINUX32) == -1) {
__libc_fatal("error setting PER_LINUX32 personality: %s", strerror(errno));
}
#endif
}
void __libc_init_AT_SECURE(KernelArgumentBlock& args) {
__libc_auxv = args.auxv;
@ -312,6 +327,8 @@ void __libc_init_AT_SECURE(KernelArgumentBlock& args) {
// Now the environment has been sanitized, make it available.
environ = args.envp;
__initialize_personality();
}
/* This function will be called during normal program termination

2
libc/include/sys/personality.h
View file

@ -34,7 +34,7 @@
__BEGIN_DECLS
extern int personality (unsigned long persona);
extern int personality (unsigned int persona);
__END_DECLS

7
linker/linker.cpp
View file

@ -37,7 +37,6 @@
#include <string.h>
#include <sys/mman.h>
#include <sys/param.h>
#include <sys/personality.h>
#include <unistd.h>
#include <new>
@ -3181,12 +3180,6 @@ static ElfW(Addr) __linker_init_post_relocation(KernelArgumentBlock& args, ElfW(
ldpreload_env = getenv("LD_PRELOAD");
}
#if !defined(__LP64__)
if (personality(PER_LINUX32) == -1) {
__libc_fatal("error setting PER_LINUX32 personality: %s", strerror(errno));
}
#endif
INFO("[ android linker & debugger ]");
soinfo* si = soinfo_alloc(args.argv[0], nullptr, 0, RTLD_GLOBAL);

2
tests/sys_personality_test.cpp
View file

@ -19,7 +19,7 @@
#include <sys/personality.h>
TEST(sys_personality, current_persona) {
int persona = personality(0xffffffff);
int persona = personality(0xffffffff) & PER_MASK;
#if defined(__BIONIC__)
#if defined(__LP64__)
ASSERT_EQ(PER_LINUX, persona);