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* [glibc/arm/gcs] aarch64: process gnu properties in static exe
@ 2024-02-14 15:07 Szabolcs Nagy
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From: Szabolcs Nagy @ 2024-02-14 15:07 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=fcdce58087260a68d1a74b28e5b0146e69511f16
commit fcdce58087260a68d1a74b28e5b0146e69511f16
Author: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date: Wed Dec 27 17:17:11 2023 +0000
aarch64: process gnu properties in static exe
Diff:
---
sysdeps/unix/sysv/linux/aarch64/libc-start.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/sysdeps/unix/sysv/linux/aarch64/libc-start.h b/sysdeps/unix/sysv/linux/aarch64/libc-start.h
index ccf0f8af5c..6e2e9762ee 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_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);
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