diff options
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/syscall.h | 4 | ||||
| -rw-r--r-- | arch/s390/kernel/entry.S | 6 | ||||
| -rw-r--r-- | arch/s390/kernel/entry64.S | 4 |
3 files changed, 5 insertions, 9 deletions
diff --git a/arch/s390/include/asm/syscall.h b/arch/s390/include/asm/syscall.h index 8429686951f..5c0246b955d 100644 --- a/arch/s390/include/asm/syscall.h +++ b/arch/s390/include/asm/syscall.h @@ -65,8 +65,6 @@ static inline void syscall_get_arguments(struct task_struct *task, if (test_tsk_thread_flag(task, TIF_31BIT)) mask = 0xffffffff; #endif - if (i + n == 6) - args[--n] = regs->args[0] & mask; while (n-- > 0) if (i + n > 0) args[n] = regs->gprs[2 + i + n] & mask; @@ -80,8 +78,6 @@ static inline void syscall_set_arguments(struct task_struct *task, const unsigned long *args) { BUG_ON(i + n > 6); - if (i + n == 6) - regs->args[0] = args[--n]; while (n-- > 0) if (i + n > 0) regs->gprs[2 + i + n] = args[n]; diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index 736d7010629..5efce720298 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -254,12 +254,11 @@ sysc_do_svc: bnl BASED(sysc_nr_ok) lr %r7,%r1 # copy svc number to %r7 sysc_nr_ok: - mvc SP_ARGS(4,%r15),SP_R7(%r15) -sysc_do_restart: sth %r7,SP_SVCNR(%r15) sll %r7,2 # svc number *4 l %r8,BASED(.Lsysc_table) tm __TI_flags+2(%r9),_TIF_SYSCALL + mvc SP_ARGS(4,%r15),SP_R7(%r15) l %r8,0(%r7,%r8) # get system call addr. bnz BASED(sysc_tracesys) basr %r14,%r8 # call sys_xxxx @@ -347,7 +346,7 @@ sysc_restart: l %r7,SP_R2(%r15) # load new svc number mvc SP_R2(4,%r15),SP_ORIG_R2(%r15) # restore first argument lm %r2,%r6,SP_R2(%r15) # load svc arguments - b BASED(sysc_do_restart) # restart svc + b BASED(sysc_nr_ok) # restart svc # # _TIF_SINGLE_STEP is set, call do_single_step @@ -380,6 +379,7 @@ sysc_tracesys: l %r8,0(%r7,%r8) sysc_tracego: lm %r3,%r6,SP_R3(%r15) + mvc SP_ARGS(4,%r15),SP_R7(%r15) l %r2,SP_ORIG_R2(%r15) basr %r14,%r8 # call sys_xxx st %r2,SP_R2(%r15) # store return value diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S index e4038ea4dc5..a2be23922f4 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) |