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tools/nolibc: stackprotector: mark implicitly used symbols as used

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During LTO the references from the compiler-generated prologue and
epilogues to the stack protector symbols are not visible and the symbols
are removed.
This will then lead to errors during linking.
As those symbols are already #ifdeffed-out if unused mark them as "used"
to prevent their removal.

Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20240812-nolibc-lto-v2-2-736af7bbefa8@weissschuh.net
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
This commit is contained in:
Thomas Weißschuh 2024-08-12 22:50:18 +02:00
parent 0021d6670d
commit ff7b9abbfc
1 changed files with 2 additions and 2 deletions
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4
tools/include/nolibc/stackprotector.h
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@ -18,7 +18,7 @@
* triggering stack protector errors themselves
*/
__attribute__((weak,noreturn,section(".text.nolibc_stack_chk")))
__attribute__((weak,used,noreturn,section(".text.nolibc_stack_chk")))
void __stack_chk_fail(void)
{
pid_t pid;
@ -34,7 +34,7 @@ void __stack_chk_fail_local(void)
__stack_chk_fail();
}
__attribute__((weak,section(".data.nolibc_stack_chk")))
__attribute__((weak,used,section(".data.nolibc_stack_chk")))
uintptr_t __stack_chk_guard;
static __no_stack_protector void __stack_chk_init(void)