[v3,20/23] aarch64: Process gnu properties in static exe
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Commit Message
From: Szabolcs Nagy <szabolcs.nagy@arm.com>
Unlike for BTI, the kernel does not process GCS properties so update
GL(dl_aarch64_gcs) before the GCS status is set.
---
sysdeps/unix/sysv/linux/aarch64/libc-start.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
@@ -21,6 +21,8 @@
#ifndef SHARED
+# include <dl-prop.h>
+
# ifndef PR_SET_SHADOW_STACK_STATUS
# define PR_GET_SHADOW_STACK_STATUS 74
# define PR_SET_SHADOW_STACK_STATUS 75
@@ -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);