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Make rtld use libc_nossp_pic.a. Remove SSP shims.

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Submitted by:	Luis Pires
Reviewed by:	brooks
Differential revision:	https://reviews.freebsd.org/D15341
This commit is contained in:
Konstantin Belousov 2018-05-09 10:30:56 +00:00
parent db08bfce2f
commit 0725fca53d
2 changed files with 2 additions and 43 deletions
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2
libexec/rtld-elf/Makefile
View File

@ -51,7 +51,7 @@ CFLAGS+= -fvisibility=hidden
CFLAGS.reloc.c+=-fno-jump-tables
.endif
LDFLAGS+= -shared -Wl,-Bsymbolic -Wl,-z,defs
LIBADD= c_pic
LIBADD= c_nossp_pic
.if ${MK_TOOLCHAIN} == "no"
LDFLAGS+= -L${LIBCDIR}
.endif

43
libexec/rtld-elf/rtld.c
View File

@ -238,8 +238,6 @@ void _rtld_error(const char *, ...) __exported;
int npagesizes, osreldate;
size_t *pagesizes;
long __stack_chk_guard[8] = {0, 0, 0, 0, 0, 0, 0, 0};
static int stack_prot = PROT_READ | PROT_WRITE | RTLD_DEFAULT_STACK_EXEC;
static int max_stack_flags;
@ -360,8 +358,7 @@ _rtld(Elf_Addr *sp, func_ptr_type *exit_proc, Obj_Entry **objp)
char **argv, *argv0, **env, **envp, *kexecpath, *library_path_rpath;
caddr_t imgentry;
char buf[MAXPATHLEN];
int argc, fd, i, mib[2], phnum, rtld_argc;
size_t len;
int argc, fd, i, phnum, rtld_argc;
bool dir_enable, explicit_fd, search_in_path;
/*
@ -399,27 +396,6 @@ _rtld(Elf_Addr *sp, func_ptr_type *exit_proc, Obj_Entry **objp)
main_argc = argc;
main_argv = argv;
if (aux_info[AT_CANARY] != NULL &&
aux_info[AT_CANARY]->a_un.a_ptr != NULL) {
i = aux_info[AT_CANARYLEN]->a_un.a_val;
if (i > sizeof(__stack_chk_guard))
i = sizeof(__stack_chk_guard);
memcpy(__stack_chk_guard, aux_info[AT_CANARY]->a_un.a_ptr, i);
} else {
mib[0] = CTL_KERN;
mib[1] = KERN_ARND;
len = sizeof(__stack_chk_guard);
if (sysctl(mib, 2, __stack_chk_guard, &len, NULL, 0) == -1 ||
len != sizeof(__stack_chk_guard)) {
/* If sysctl was unsuccessful, use the "terminator canary". */
((unsigned char *)(void *)__stack_chk_guard)[0] = 0;
((unsigned char *)(void *)__stack_chk_guard)[1] = 0;
((unsigned char *)(void *)__stack_chk_guard)[2] = '\n';
((unsigned char *)(void *)__stack_chk_guard)[3] = 255;
}
}
trust = !issetugid();
md_abi_variant_hook(aux_info);
@ -5537,23 +5513,6 @@ __pthread_cxa_finalize(struct dl_phdr_info *a)
{
}
void
__stack_chk_fail(void)
{
_rtld_error("stack overflow detected; terminated");
rtld_die();
}
__weak_reference(__stack_chk_fail, __stack_chk_fail_local);
void
__chk_fail(void)
{
_rtld_error("buffer overflow detected; terminated");
rtld_die();
}
const char *
rtld_strerror(int errnum)
{