From 49db46a67bec9ca9e29ece4729a876195877af50 Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Thu, 26 Feb 2015 14:40:25 -0800 Subject: x86/asm: Introduce push/pop macros which generate CFI_REL_OFFSET and CFI_RESTORE Sequences: pushl_cfi %reg CFI_REL_OFFSET reg, 0 and: popl_cfi %reg CFI_RESTORE reg happen quite often. This patch adds macros which generate them. No assembly changes (verified with objdump -dr vmlinux.o). Signed-off-by: Denys Vlasenko Signed-off-by: Andy Lutomirski Cc: Alexei Starovoitov Cc: Borislav Petkov Cc: Frederic Weisbecker Cc: H. Peter Anvin Cc: Kees Cook Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Will Drewry Link: http://lkml.kernel.org/r/1421017655-25561-1-git-send-email-dvlasenk@redhat.com Link: http://lkml.kernel.org/r/2202eb90f175cf45d1b2d1c64dbb5676a8ad07ad.1424989793.git.luto@amacapital.net Signed-off-by: Ingo Molnar --- arch/x86/include/asm/dwarf2.h | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'arch/x86/include/asm/dwarf2.h') diff --git a/arch/x86/include/asm/dwarf2.h b/arch/x86/include/asm/dwarf2.h index f6f15986df6c..de1cdaf4d743 100644 --- a/arch/x86/include/asm/dwarf2.h +++ b/arch/x86/include/asm/dwarf2.h @@ -86,11 +86,23 @@ CFI_ADJUST_CFA_OFFSET 8 .endm + .macro pushq_cfi_reg reg + pushq %\reg + CFI_ADJUST_CFA_OFFSET 8 + CFI_REL_OFFSET \reg, 0 + .endm + .macro popq_cfi reg popq \reg CFI_ADJUST_CFA_OFFSET -8 .endm + .macro popq_cfi_reg reg + popq %\reg + CFI_ADJUST_CFA_OFFSET -8 + CFI_RESTORE \reg + .endm + .macro pushfq_cfi pushfq CFI_ADJUST_CFA_OFFSET 8 @@ -116,11 +128,23 @@ CFI_ADJUST_CFA_OFFSET 4 .endm + .macro pushl_cfi_reg reg + pushl %\reg + CFI_ADJUST_CFA_OFFSET 4 + CFI_REL_OFFSET \reg, 0 + .endm + .macro popl_cfi reg popl \reg CFI_ADJUST_CFA_OFFSET -4 .endm + .macro popl_cfi_reg reg + popl %\reg + CFI_ADJUST_CFA_OFFSET -4 + CFI_RESTORE \reg + .endm + .macro pushfl_cfi pushfl CFI_ADJUST_CFA_OFFSET 4 -- cgit v1.2.1