[PATCH v9 16/19] aarch64: Process gnu properties in static exe

[Yury Khrustalev]

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.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
---
 sysdeps/unix/sysv/linux/aarch64/libc-start.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/sysdeps/unix/sysv/linux/aarch64/libc-start.h b/sysdeps/unix/sysv/linux/aarch64/libc-start.h
index 2ea61bf272..75ae0a884a 100644
--- a/sysdeps/unix/sysv/linux/aarch64/libc-start.h
+++ b/sysdeps/unix/sysv/linux/aarch64/libc-start.h
@@ -21,6 +21,8 @@
 
 #ifndef SHARED
 
+# include <dl-prop.h>
+
 # ifndef PR_SET_SHADOW_STACK_STATUS
 #  define PR_SET_SHADOW_STACK_STATUS	75
 #  define PR_SHADOW_STACK_ENABLE	(1UL << 0)
@@ -31,6 +33,18 @@ static inline void __attribute__((always_inline))
 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;
+      }
+
   if (GL(dl_aarch64_gcs) != 0)
     {
       int ret = INLINE_SYSCALL_CALL (prctl, PR_SET_SHADOW_STACK_STATUS,
-- 
2.39.5