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x86_64: ia32entry adjustments

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Consolidate the three 32-bit system call entry points so that they all
treat registers in similar ways.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jan Beulich
2007-07-21 17:10:20 +02:00
committed by Linus Torvalds
parent c3508f8f34
commit cdc1793ef7
1 changed files with 3 additions and 2 deletions
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5
arch/x86_64/ia32/ia32entry.S
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@@ -104,7 +104,7 @@ ENTRY(ia32_sysenter_target)
pushq %rax pushq %rax
CFI_ADJUST_CFA_OFFSET 8 CFI_ADJUST_CFA_OFFSET 8
cld cld
SAVE_ARGS 0,0,0 SAVE_ARGS 0,0,1
/* no need to do an access_ok check here because rbp has been /* no need to do an access_ok check here because rbp has been
32bit zero extended */ 32bit zero extended */
1: movl (%rbp),%r9d 1: movl (%rbp),%r9d
@@ -294,7 +294,7 @@ ia32_badarg:
*/ */
ENTRY(ia32_syscall) ENTRY(ia32_syscall)
CFI_STARTPROC simple CFI_STARTPROC32 simple
CFI_SIGNAL_FRAME CFI_SIGNAL_FRAME
CFI_DEF_CFA rsp,SS+8-RIP CFI_DEF_CFA rsp,SS+8-RIP
/*CFI_REL_OFFSET ss,SS-RIP*/ /*CFI_REL_OFFSET ss,SS-RIP*/
@@ -330,6 +330,7 @@ ia32_sysret:
ia32_tracesys: ia32_tracesys:
SAVE_REST SAVE_REST
CLEAR_RREGS
movq $-ENOSYS,RAX(%rsp) /* really needed? */ movq $-ENOSYS,RAX(%rsp) /* really needed? */
movq %rsp,%rdi /* &pt_regs -> arg1 */ movq %rsp,%rdi /* &pt_regs -> arg1 */
call syscall_trace_enter call syscall_trace_enter