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aarch64: Process gnu properties in static exe

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Unlike for BTI, the kernel does not process GCS properties so update
GL(dl_aarch64_gcs) before the GCS status is set.
This commit is contained in:
Szabolcs Nagy 2023-12-27 17:17:11 +00:00
parent e6b927e2f9
commit 435305562e
1 changed files with 12 additions and 0 deletions
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12
sysdeps/unix/sysv/linux/aarch64/libc-start.h
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@ -21,6 +21,8 @@
#ifndef SHARED
# include <dl-prop.h>
# ifndef PR_SET_SHADOW_STACK_STATUS
# define PR_GET_SHADOW_STACK_STATUS 71
# define PR_SET_SHADOW_STACK_STATUS 72
@ -36,6 +38,16 @@ aarch64_libc_setup_tls (void)
{
__libc_setup_tls ();
struct link_map *main_map = _dl_get_dl_main_map ();
const ElfW(Phdr) *phdr = GL(dl_phdr);
const ElfW(Phdr) *ph;
for (ph = phdr; ph < phdr + GL(dl_phnum); ph++)
if (ph->p_type == PT_GNU_PROPERTY)
{
_dl_process_pt_gnu_property (main_map, -1, ph);
_rtld_main_check (main_map, _dl_argv[0]);
break;
}
uint64_t s = GL(dl_aarch64_gcs);
if (s != 0)
INLINE_SYSCALL_CALL (prctl, PR_SET_SHADOW_STACK_STATUS, s, 0, 0, 0);