linux-kernel - [PATCH 2.6.22] [2/5] x86_64: Check for .cfi_rel

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Date:	Wed, 15 Aug 2007 12:38:55 +0200 (CEST)
From:	Andi Kleen <ak@...e.de>
To:	jbeulich@...ell.com, patches@...-64.org,
	linux-kernel@...r.kernel.org, stable@...nel.org
Subject: [PATCH 2.6.22] [2/5] x86_64: Check for .cfi_rel_offset in CFI probe


Very old binutils have .cfi_startproc/endproc, but
no .cfi_rel_offset. Check for .cfi_rel_offset too.

Cc: jbeulich@...ell.com

---
 arch/i386/Makefile   |    4 ++--
 arch/x86_64/Makefile |    4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

Index: linux-2.6.22-stable/arch/x86_64/Makefile
===================================================================
--- linux-2.6.22-stable.orig/arch/x86_64/Makefile
+++ linux-2.6.22-stable/arch/x86_64/Makefile
@@ -57,8 +57,8 @@ cflags-y += $(call cc-option,-mno-sse -m
 cflags-y += -maccumulate-outgoing-args
 
 # do binutils support CFI?
-cflags-y += $(call as-instr,.cfi_startproc\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
-AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
+cflags-y += $(call as-instr,.cfi_startproc\n.cfi_rel_offset rsp${comma}0\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
+AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_rel_offset rsp${comma}0\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
 
 # is .cfi_signal_frame supported too?
 cflags-y += $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1,)
Index: linux-2.6.22-stable/arch/i386/Makefile
===================================================================
--- linux-2.6.22-stable.orig/arch/i386/Makefile
+++ linux-2.6.22-stable/arch/i386/Makefile
@@ -51,8 +51,8 @@ cflags-y += -maccumulate-outgoing-args
 CFLAGS				+= $(shell if [ $(call cc-version) -lt 0400 ] ; then echo $(call cc-option,-fno-unit-at-a-time); fi ;)
 
 # do binutils support CFI?
-cflags-y += $(call as-instr,.cfi_startproc\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
-AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
+cflags-y += $(call as-instr,.cfi_startproc\n.cfi_rel_offset esp${comma}0\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
+AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_rel_offset esp${comma}0\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
 
 # is .cfi_signal_frame supported too?
 cflags-y += $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1,)
-
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