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| Started by | Josh Poimboeuf <jpoimboe@redhat.com> |
|---|---|
| First post | 2015-08-07 19:00 +0200 |
| Last post | 2015-08-07 19:00 +0200 |
| Articles | 1 — 1 participant |
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[PATCH v9 19/20] x86/asm/efi: Create a stack frame in efi_call() Josh Poimboeuf <jpoimboe@redhat.com> - 2015-08-07 19:00 +0200
| From | Josh Poimboeuf <jpoimboe@redhat.com> |
|---|---|
| Date | 2015-08-07 19:00 +0200 |
| Subject | [PATCH v9 19/20] x86/asm/efi: Create a stack frame in efi_call() |
| Message-ID | <pUT9U-5pP-9@gated-at.bofh.it> |
efi_call() is a callable non-leaf function which doesn't honor CONFIG_FRAME_POINTER, which can result in bad stack traces. Create a stack frame for it when CONFIG_FRAME_POINTER is enabled. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Matt Fleming <matt.fleming@intel.com> --- arch/x86/platform/efi/efi_stub_64.S | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/platform/efi/efi_stub_64.S b/arch/x86/platform/efi/efi_stub_64.S index 86d0f9e..0df2dcc 100644 --- a/arch/x86/platform/efi/efi_stub_64.S +++ b/arch/x86/platform/efi/efi_stub_64.S @@ -11,6 +11,7 @@ #include <asm/msr.h> #include <asm/processor-flags.h> #include <asm/page_types.h> +#include <asm/frame.h> #define SAVE_XMM \ mov %rsp, %rax; \ @@ -74,6 +75,7 @@ .endm ENTRY(efi_call) + FRAME_BEGIN SAVE_XMM mov (%rsp), %rax mov 8(%rax), %rax @@ -88,6 +90,7 @@ ENTRY(efi_call) RESTORE_PGT addq $48, %rsp RESTORE_XMM + FRAME_END ret ENDPROC(efi_call) -- 2.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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