UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

x86: Unwind-annotate thunk_32.S 

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Link: http://lkml.kernel.org/r/542291CA0200007800038085@mail.emea.novell.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Jan Beulich 2014-09-24 08:41:30 +01:00 committed by Thomas Gleixner
parent 5f1d919a8c
commit f74954f01e
1 changed files with 15 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
arch/x86/lib/thunk_32.S
View File

@ -6,14 +6,19 @@
*/
#include <linux/linkage.h>
#include <asm/asm.h>
#include <asm/dwarf2.h>
/* put return address in eax (arg1) */
.macro THUNK name, func, put_ret_addr_in_eax=0
.globl \name
\name:
pushl %eax
pushl %ecx
pushl %edx
CFI_STARTPROC
pushl_cfi %eax
CFI_REL_OFFSET eax, 0
pushl_cfi %ecx
CFI_REL_OFFSET ecx, 0
pushl_cfi %edx
CFI_REL_OFFSET edx, 0
.if \put_ret_addr_in_eax
/* Place EIP in the arg1 */
@ -21,10 +26,14 @@
.endif
call \func
popl %edx
popl %ecx
popl %eax
popl_cfi %edx
CFI_RESTORE edx
popl_cfi %ecx
CFI_RESTORE ecx
popl_cfi %eax
CFI_RESTORE eax
ret
CFI_ENDPROC
_ASM_NOKPROBE(\name)
.endm