/*
- * arch/s390/kernel/entry.S
+ * arch/s390/kernel/entry64.S
* S390 low-level entry points.
*
- * S390 version
- * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ * Copyright (C) IBM Corp. 1999,2006
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
* Hartmut Penner (hp@de.ibm.com),
* Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com),
STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER
STACK_SIZE = 1 << STACK_SHIFT
-_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_MCCK_PENDING | \
- _TIF_RESTART_SVC | _TIF_SINGLE_STEP )
-_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_MCCK_PENDING)
+_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK | _TIF_NEED_RESCHED | \
+ _TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_SINGLE_STEP )
+_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK | _TIF_NEED_RESCHED | \
+ _TIF_MCCK_PENDING)
#define BASED(name) name-system_call(%r13)
clc \psworg+8(8),BASED(.Lcritical_start)
jl 0f
brasl %r14,cleanup_critical
- tm 0(%r12),0x01 # retest problem state after cleanup
+ tm 1(%r12),0x01 # retest problem state after cleanup
jnz 1f
0: lg %r14,__LC_ASYNC_STACK # are we already on the async. stack ?
slgr %r14,%r15
mvc SP_ARGS(8,%r15),SP_R7(%r15)
sysc_do_restart:
larl %r10,sys_call_table
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
tm __TI_flags+5(%r9),(_TIF_31BIT>>16) # running in 31 bit mode ?
jno sysc_noemu
larl %r10,sys_call_table_emu # use 31 bit emulation system calls
jo sysc_mcck_pending
tm __TI_flags+7(%r9),_TIF_NEED_RESCHED
jo sysc_reschedule
- tm __TI_flags+7(%r9),_TIF_SIGPENDING
- jo sysc_sigpending
+ tm __TI_flags+7(%r9),(_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK)
+ jnz sysc_sigpending
tm __TI_flags+7(%r9),_TIF_RESTART_SVC
jo sysc_restart
tm __TI_flags+7(%r9),_TIF_SINGLE_STEP
jg s390_handle_mcck # TIF bit will be cleared by handler
#
-# _TIF_SIGPENDING is set, call do_signal
+# _TIF_SIGPENDING or _TIF_RESTORE_SIGMASK is set, call do_signal
#
sysc_sigpending:
ni __TI_flags+7(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
la %r2,SP_PTREGS(%r15) # load pt_regs
- sgr %r3,%r3 # clear *oldset
brasl %r14,do_signal # call do_signal
tm __TI_flags+7(%r9),_TIF_RESTART_SVC
jo sysc_restart
tm __TI_flags+7(%r9),_TIF_SINGLE_STEP
jo sysc_singlestep
- j sysc_leave # out of here, do NOT recheck
+ j sysc_work_loop
#
# _TIF_RESTART_SVC is set, set up registers and restart svc
la %r2,SP_PTREGS(%r15) # load pt_regs
jg sys_clone # branch to sys_clone
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
sys32_clone_glue:
la %r2,SP_PTREGS(%r15) # load pt_regs
jg sys32_clone # branch to sys32_clone
bnz 0(%r12) # it did fail -> store result in gpr2
b 6(%r12) # SKIP STG 2,SP_R2(15) in
# system_call/sysc_tracesys
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
sys32_execve_glue:
la %r2,SP_PTREGS(%r15) # load pt_regs
lgr %r12,%r14 # save return address
la %r2,SP_PTREGS(%r15) # load pt_regs as parameter
jg sys_sigreturn # branch to sys_sigreturn
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
sys32_sigreturn_glue:
la %r2,SP_PTREGS(%r15) # load pt_regs as parameter
jg sys32_sigreturn # branch to sys32_sigreturn
la %r2,SP_PTREGS(%r15) # load pt_regs as parameter
jg sys_rt_sigreturn # branch to sys_sigreturn
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
sys32_rt_sigreturn_glue:
la %r2,SP_PTREGS(%r15) # load pt_regs as parameter
jg sys32_rt_sigreturn # branch to sys32_sigreturn
#endif
-#
-# sigsuspend and rt_sigsuspend need pt_regs as an additional
-# parameter and they have to skip the store of %r2 into the
-# user register %r2 because the return value was set in
-# sigsuspend and rt_sigsuspend already and must not be overwritten!
-#
-
-sys_sigsuspend_glue:
- lgr %r5,%r4 # move mask back
- lgr %r4,%r3 # move history1 parameter
- lgr %r3,%r2 # move history0 parameter
- la %r2,SP_PTREGS(%r15) # load pt_regs as first parameter
- la %r14,6(%r14) # skip store of return value
- jg sys_sigsuspend # branch to sys_sigsuspend
-
-#ifdef CONFIG_S390_SUPPORT
-sys32_sigsuspend_glue:
- llgfr %r4,%r4 # unsigned long
- lgr %r5,%r4 # move mask back
- lgfr %r3,%r3 # int
- lgr %r4,%r3 # move history1 parameter
- lgfr %r2,%r2 # int
- lgr %r3,%r2 # move history0 parameter
- la %r2,SP_PTREGS(%r15) # load pt_regs as first parameter
- la %r14,6(%r14) # skip store of return value
- jg sys32_sigsuspend # branch to sys32_sigsuspend
-#endif
-
-sys_rt_sigsuspend_glue:
- lgr %r4,%r3 # move sigsetsize parameter
- lgr %r3,%r2 # move unewset parameter
- la %r2,SP_PTREGS(%r15) # load pt_regs as first parameter
- la %r14,6(%r14) # skip store of return value
- jg sys_rt_sigsuspend # branch to sys_rt_sigsuspend
-
-#ifdef CONFIG_S390_SUPPORT
-sys32_rt_sigsuspend_glue:
- llgfr %r3,%r3 # size_t
- lgr %r4,%r3 # move sigsetsize parameter
- llgtr %r2,%r2 # sigset_emu31_t *
- lgr %r3,%r2 # move unewset parameter
- la %r2,SP_PTREGS(%r15) # load pt_regs as first parameter
- la %r14,6(%r14) # skip store of return value
- jg sys32_rt_sigsuspend # branch to sys32_rt_sigsuspend
-#endif
-
sys_sigaltstack_glue:
la %r4,SP_PTREGS(%r15) # load pt_regs as parameter
jg sys_sigaltstack # branch to sys_sigreturn
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
sys32_sigaltstack_glue:
la %r4,SP_PTREGS(%r15) # load pt_regs as parameter
jg sys32_sigaltstack_wrapper # branch to sys_sigreturn
lgr %r15,%r1
#
# One of the work bits is on. Find out which one.
-# Checked are: _TIF_SIGPENDING, _TIF_NEED_RESCHED and _TIF_MCCK_PENDING
+# Checked are: _TIF_SIGPENDING, _TIF_RESTORE_SIGPENDING, _TIF_NEED_RESCHED
+# and _TIF_MCCK_PENDING
#
io_work_loop:
tm __TI_flags+7(%r9),_TIF_MCCK_PENDING
jo io_mcck_pending
tm __TI_flags+7(%r9),_TIF_NEED_RESCHED
jo io_reschedule
- tm __TI_flags+7(%r9),_TIF_SIGPENDING
- jo io_sigpending
+ tm __TI_flags+7(%r9),(_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK)
+ jnz io_sigpending
j io_leave
#
j io_work_loop
#
-# _TIF_SIGPENDING is set, call do_signal
+# _TIF_SIGPENDING or _TIF_RESTORE_SIGMASK is set, call do_signal
#
io_sigpending:
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
la %r2,SP_PTREGS(%r15) # load pt_regs
- slgr %r3,%r3 # clear *oldset
brasl %r14,do_signal # call do_signal
stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts
- j sysc_leave # out of here, do NOT recheck
+ j io_work_loop
/*
* External interrupt handler routine
#include "syscalls.S"
#undef SYSCALL
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
#define SYSCALL(esa,esame,emu) .long emu
.globl sys_call_table_emu