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Commit 6e0c47ed authored by Jan Beulich's avatar Jan Beulich Committed by Linus Torvalds
Browse files

[PATCH] x86_64: Separate CONFIG_UNWIND_INFO from CONFIG_DEBUG_INFO 



As a follow-up to the introduction of CONFIG_UNWIND_INFO, this
separates the generation of frame unwind information for x86-64 from
that of full debug information.

Signed-off-by: default avatarAndi Kleen <ak@suse.de>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 130951cc

arch/x86_64/Makefile

+3 −1
Original line number Diff line number Diff line
@@ -38,8 +38,10 @@ CFLAGS += -pipe 
# actually it makes the kernel smaller too.

CFLAGS += -fno-reorder-blocks	

CFLAGS += -Wno-sign-compare

ifneq ($(CONFIG_DEBUG_INFO),y)

ifneq ($(CONFIG_UNWIND_INFO),y)

CFLAGS += -fno-asynchronous-unwind-tables

endif

ifneq ($(CONFIG_DEBUG_INFO),y)

# -fweb shrinks the kernel a bit, but the difference is very small

# it also messes up debugging, so don't use it for now.

#CFLAGS += $(call cc-option,-fweb)

arch/x86_64/kernel/vmlinux.lds.S

+1 −1
Original line number Diff line number Diff line
@@ -189,7 +189,7 @@ SECTIONS 
  /* Sections to be discarded */

  /DISCARD/ : {

	*(.exitcall.exit)

#ifndef CONFIG_DEBUG_INFO

#ifndef CONFIG_UNWIND_INFO

	*(.eh_frame)

#endif

	}

include/asm-x86_64/dwarf2.h

+1 −1
Original line number Diff line number Diff line
@@ -14,7 +14,7 @@ 
   away for older version. 

 */



#ifdef CONFIG_DEBUG_INFO

#ifdef CONFIG_UNWIND_INFO



#define CFI_STARTPROC .cfi_startproc

#define CFI_ENDPROC .cfi_endproc