diff options
| author | Andi Kleen <ak@suse.de> | 2006-09-26 10:52:29 +0200 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2006-09-26 10:52:29 +0200 |
| commit | ecaf45ee5ce60afe7cc46e91d82c1b0cbda09387 (patch) | |
| tree | 09ff150151dc6724f250da068c2653dc13b4e3c0 /include/asm-i386 | |
| parent | 07c9819b31eda7954feddc83f2fae035f31c11e1 (diff) | |
[PATCH] i386: Redo semaphore and rwlock assembly helpers
- Move them to a pure assembly file. Previously they were in
a C file that only consisted of inline assembly. Doing it in pure
assembler is much nicer.
- Add a frame.i include with FRAME/ENDFRAME macros to easily
add frame pointers to assembly functions
- Add dwarf2 annotation to them so that the new dwarf2 unwinder
doesn't get stuck on them
- Random cleanups
Includes feedback from Jan Beulich and a UML build fix from Andrew
Morton.
Cc: jbeulich@novell.com
Cc: jdike@addtoit.com
Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'include/asm-i386')
| -rw-r--r-- | include/asm-i386/frame.i | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/asm-i386/frame.i b/include/asm-i386/frame.i new file mode 100644 index 00000000000..4d68ddce18b --- /dev/null +++ b/include/asm-i386/frame.i @@ -0,0 +1,24 @@ +#include <linux/config.h> +#include <asm/dwarf2.h> + +/* The annotation hides the frame from the unwinder and makes it look + like a ordinary ebp save/restore. This avoids some special cases for + frame pointer later */ +#ifdef CONFIG_FRAME_POINTER + .macro FRAME + pushl %ebp + CFI_ADJUST_CFA_OFFSET 4 + CFI_REL_OFFSET ebp,0 + movl %esp,%ebp + .endm + .macro ENDFRAME + popl %ebp + CFI_ADJUST_CFA_OFFSET -4 + CFI_RESTORE ebp + .endm +#else + .macro FRAME + .endm + .macro ENDFRAME + .endm +#endif |