aboutsummaryrefslogtreecommitdiff
path: root/include/asm-i386/frame.i
diff options
context:
space:
mode:
authorAndi Kleen <ak@suse.de>2006-09-26 10:52:29 +0200
committerAndi Kleen <andi@basil.nowhere.org>2006-09-26 10:52:29 +0200
commitecaf45ee5ce60afe7cc46e91d82c1b0cbda09387 (patch)
tree09ff150151dc6724f250da068c2653dc13b4e3c0 /include/asm-i386/frame.i
parent07c9819b31eda7954feddc83f2fae035f31c11e1 (diff)
downloadlinux-2.6.34-ux500-ecaf45ee5ce60afe7cc46e91d82c1b0cbda09387.tar.gz
[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 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