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authorAndi Kleen <ak@suse.de>2006-09-26 04:52:29 -0400
committerAndi Kleen <andi@basil.nowhere.org>2006-09-26 04:52:29 -0400
commitecaf45ee5ce60afe7cc46e91d82c1b0cbda09387 (patch)
tree09ff150151dc6724f250da068c2653dc13b4e3c0 /include/asm-i386/frame.i
parent07c9819b31eda7954feddc83f2fae035f31c11e1 (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/frame.i')
-rw-r--r--include/asm-i386/frame.i24
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 000000000000..4d68ddce18b6
--- /dev/null
+++ b/include/asm-i386/frame.i
@@ -0,0 +1,24 @@
1#include <linux/config.h>
2#include <asm/dwarf2.h>
3
4/* The annotation hides the frame from the unwinder and makes it look
5 like a ordinary ebp save/restore. This avoids some special cases for
6 frame pointer later */
7#ifdef CONFIG_FRAME_POINTER
8 .macro FRAME
9 pushl %ebp
10 CFI_ADJUST_CFA_OFFSET 4
11 CFI_REL_OFFSET ebp,0
12 movl %esp,%ebp
13 .endm
14 .macro ENDFRAME
15 popl %ebp
16 CFI_ADJUST_CFA_OFFSET -4
17 CFI_RESTORE ebp
18 .endm
19#else
20 .macro FRAME
21 .endm
22 .macro ENDFRAME
23 .endm
24#endif