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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2010-10-25 16:10:40 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2010-10-25 16:10:19 +0200 |
| commit | baa071588c3ffcc1a8721faf9337140e85d34bf6 (patch) | |
| tree | 5aefe1db8edbc3dfb956669e657368673ad601ef /arch/s390/kernel/entry64.S | |
| parent | [S390] correct alignment of cpuid structure (diff) | |
| download | linux-baa071588c3ffcc1a8721faf9337140e85d34bf6.tar.xz linux-baa071588c3ffcc1a8721faf9337140e85d34bf6.zip | |
[S390] cleanup system call parameter setup
Do the setup of the stack overflow argument for the sixth system
call parameter right before the branch to the system call function.
That simplifies the system call parameter access code.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/entry64.S')
| -rw-r--r-- | arch/s390/kernel/entry64.S | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S index e4038ea4dc57..a2be23922f43 100644 --- a/arch/s390/kernel/entry64.S +++ b/arch/s390/kernel/entry64.S @@ -246,7 +246,6 @@ sysc_saveall: CREATE_STACK_FRAME __LC_SAVE_AREA mvc SP_PSW(16,%r15),__LC_SVC_OLD_PSW mvc SP_ILC(4,%r15),__LC_SVC_ILC - stg %r7,SP_ARGS(%r15) lg %r12,__LC_THREAD_INFO # load pointer to thread_info struct sysc_vtime: UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER @@ -274,6 +273,7 @@ sysc_nr_ok: sysc_noemu: #endif tm __TI_flags+6(%r12),_TIF_SYSCALL + mvc SP_ARGS(8,%r15),SP_R7(%r15) lgf %r8,0(%r7,%r10) # load address of system call routine jnz sysc_tracesys basr %r14,%r8 # call sys_xxxx @@ -387,6 +387,7 @@ sysc_tracesys: lgf %r8,0(%r7,%r10) sysc_tracego: lmg %r3,%r6,SP_R3(%r15) + mvc SP_ARGS(8,%r15),SP_R7(%r15) lg %r2,SP_ORIG_R2(%r15) basr %r14,%r8 # call sys_xxx stg %r2,SP_R2(%r15) # store return value @@ -953,7 +954,6 @@ cleanup_system_call: CREATE_STACK_FRAME __LC_SAVE_AREA mvc SP_PSW(16,%r15),__LC_SVC_OLD_PSW mvc SP_ILC(4,%r15),__LC_SVC_ILC - stg %r7,SP_ARGS(%r15) mvc 8(8,%r12),__LC_THREAD_INFO cleanup_vtime: clc __LC_RETURN_PSW+8(8),BASED(cleanup_system_call_insn+24) |