diff options
| author | Jan Beulich <jbeulich@novell.com> | 2006-06-26 13:57:44 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-26 10:48:17 -0700 |
| commit | fe7cacc1c25e286872b878c5d46880b620cd1e2d (patch) | |
| tree | 36b0e47e15eb00c7ee4240cb28572952f4d39348 /include/asm-i386 | |
| parent | 176a2718f408ce92788b29127050b04dfd6e4f68 (diff) | |
[PATCH] i386: reliable stack trace support i386 entry.S
To increase the usefulness of reliable stack unwinding, this adds CFI
unwind annotations to many low-level i386 routines.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-i386')
| -rw-r--r-- | include/asm-i386/dwarf2.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/include/asm-i386/dwarf2.h b/include/asm-i386/dwarf2.h new file mode 100644 index 000000000000..2280f6272f80 --- /dev/null +++ b/include/asm-i386/dwarf2.h @@ -0,0 +1,54 @@ +#ifndef _DWARF2_H +#define _DWARF2_H + +#include <linux/config.h> + +#ifndef __ASSEMBLY__ +#warning "asm/dwarf2.h should be only included in pure assembly files" +#endif + +/* + Macros for dwarf2 CFI unwind table entries. + See "as.info" for details on these pseudo ops. Unfortunately + they are only supported in very new binutils, so define them + away for older version. + */ + +#ifdef CONFIG_UNWIND_INFO + +#define CFI_STARTPROC .cfi_startproc +#define CFI_ENDPROC .cfi_endproc +#define CFI_DEF_CFA .cfi_def_cfa +#define CFI_DEF_CFA_REGISTER .cfi_def_cfa_register +#define CFI_DEF_CFA_OFFSET .cfi_def_cfa_offset +#define CFI_ADJUST_CFA_OFFSET .cfi_adjust_cfa_offset +#define CFI_OFFSET .cfi_offset +#define CFI_REL_OFFSET .cfi_rel_offset +#define CFI_REGISTER .cfi_register +#define CFI_RESTORE .cfi_restore +#define CFI_REMEMBER_STATE .cfi_remember_state +#define CFI_RESTORE_STATE .cfi_restore_state + +#else + +/* Due to the structure of pre-exisiting code, don't use assembler line + comment character # to ignore the arguments. Instead, use a dummy macro. */ +.macro ignore a=0, b=0, c=0, d=0 +.endm + +#define CFI_STARTPROC ignore +#define CFI_ENDPROC ignore +#define CFI_DEF_CFA ignore +#define CFI_DEF_CFA_REGISTER ignore +#define CFI_DEF_CFA_OFFSET ignore +#define CFI_ADJUST_CFA_OFFSET ignore +#define CFI_OFFSET ignore +#define CFI_REL_OFFSET ignore +#define CFI_REGISTER ignore +#define CFI_RESTORE ignore +#define CFI_REMEMBER_STATE ignore +#define CFI_RESTORE_STATE ignore + +#endif + +#endif |