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Fix stack-protector for powerpc

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On powerpc, stack protector expects a function called
__stack_chk_fail_local() instead of __stack_chk_fail()

And some versions of GCC for powerpc default to TLS canary
instead of global canary, so always force GCC to use global
canary with -mstack-protector-guard=global

Cc: Joel Peshkin <joel.peshkin@broadcom.com>
Fixes: 4e9bce1243 ("Add support for stack-protector")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
This commit is contained in:
Christophe Leroy 2023-11-15 19:36:36 +01:00 committed by Tom Rini
parent 654580eee1
commit 4072572b0f
2 changed files with 6 additions and 0 deletions
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1
Makefile
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@ -750,6 +750,7 @@ endif
ifeq ($(CONFIG_STACKPROTECTOR),y)
KBUILD_CFLAGS += $(call cc-option,-fstack-protector-strong)
KBUILD_CFLAGS += $(call cc-option,-mstack-protector-guard=global)
CFLAGS_EFI += $(call cc-option,-fno-stack-protector)
else
KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector)

5
common/stackprot.c
View file

@ -18,3 +18,8 @@ void __stack_chk_fail(void)
panic("Stack smashing detected in function:\n%p relocated from %p",
ra, ra - gd->reloc_off);
}
void __stack_chk_fail_local(void)
{
__stack_chk_fail();
}