Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen...

[linux-2.6-omap-h63xx.git] / arch / s390 / kernel / entry64.S

diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index d7ce150453f2865bfa4c9e99f53c03cda198442d..89c121ae63391ef0453367cd26efa36d10296cf3 100644 (file)
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -46,7 +46,7 @@ SP_R14             =  STACK_FRAME_OVERHEAD + __PT_GPRS + 112
 SP_R15      =  STACK_FRAME_OVERHEAD + __PT_GPRS + 120
 SP_ORIG_R2   = STACK_FRAME_OVERHEAD + __PT_ORIG_GPR2
 SP_ILC      =  STACK_FRAME_OVERHEAD + __PT_ILC
-SP_TRAP      = STACK_FRAME_OVERHEAD + __PT_TRAP
+SP_SVCNR      =        STACK_FRAME_OVERHEAD + __PT_SVCNR
 SP_SIZE      = STACK_FRAME_OVERHEAD + __PT_SIZE
 
 STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER
@@ -61,19 +61,22 @@ _TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
 
 #ifdef CONFIG_TRACE_IRQFLAGS
        .macro  TRACE_IRQS_ON
-        brasl  %r14,trace_hardirqs_on
+        basr   %r2,%r0
+        brasl  %r14,trace_hardirqs_on_caller
        .endm
 
        .macro  TRACE_IRQS_OFF
-        brasl  %r14,trace_hardirqs_off
+        basr   %r2,%r0
+        brasl  %r14,trace_hardirqs_off_caller
        .endm
 
        .macro TRACE_IRQS_CHECK
+       basr    %r2,%r0
        tm      SP_PSW(%r15),0x03       # irqs enabled?
        jz      0f
-       brasl   %r14,trace_hardirqs_on
+       brasl   %r14,trace_hardirqs_on_caller
        j       1f
-0:     brasl   %r14,trace_hardirqs_off
+0:     brasl   %r14,trace_hardirqs_off_caller
 1:
        .endm
 #else
@@ -168,11 +171,10 @@ _TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
        .macro  CREATE_STACK_FRAME psworg,savearea
        aghi    %r15,-SP_SIZE           # make room for registers & psw
        mvc     SP_PSW(16,%r15),0(%r12) # move user PSW to stack
-       la      %r12,\psworg
        stg     %r2,SP_ORIG_R2(%r15)    # store original content of gpr 2
-       icm     %r12,12,__LC_SVC_ILC
+       icm     %r12,3,__LC_SVC_ILC
        stmg    %r0,%r11,SP_R0(%r15)    # store gprs %r0-%r11 to kernel stack
-       st      %r12,SP_ILC(%r15)
+       st      %r12,SP_SVCNR(%r15)
        mvc     SP_R12(32,%r15),\savearea # move %r12-%r15 to stack
        la      %r12,0
        stg     %r12,__SF_BACKCHAIN(%r15)
@@ -247,16 +249,17 @@ sysc_update:
 #endif
 sysc_do_svc:
        lg      %r9,__LC_THREAD_INFO    # load pointer to thread_info struct
-       slag    %r7,%r7,2       # *4 and test for svc 0
+       ltgr    %r7,%r7         # test for svc 0
        jnz     sysc_nr_ok
        # svc 0: system call number in %r1
        cl      %r1,BASED(.Lnr_syscalls)
        jnl     sysc_nr_ok
        lgfr    %r7,%r1         # clear high word in r1
-       slag    %r7,%r7,2       # svc 0: system call number in %r1
 sysc_nr_ok:
        mvc     SP_ARGS(8,%r15),SP_R7(%r15)
 sysc_do_restart:
+       sth     %r7,SP_SVCNR(%r15)
+       sllg    %r7,%r7,2       # svc number * 4
        larl    %r10,sys_call_table
 #ifdef CONFIG_COMPAT
        tm      __TI_flags+5(%r9),(_TIF_31BIT>>16)  # running in 31 bit mode ?
@@ -360,7 +363,6 @@ sysc_notify_resume:
 sysc_restart:
        ni      __TI_flags+7(%r9),255-_TIF_RESTART_SVC # clear TIF_RESTART_SVC
        lg      %r7,SP_R2(%r15)         # load new svc number
-       slag    %r7,%r7,2               # *4
        mvc     SP_R2(8,%r15),SP_ORIG_R2(%r15) # restore first argument
        lmg     %r2,%r6,SP_R2(%r15)     # load svc arguments
        j       sysc_do_restart         # restart svc
@@ -369,9 +371,8 @@ sysc_restart:
 # _TIF_SINGLE_STEP is set, call do_single_step
 #
 sysc_singlestep:
-       ni      __TI_flags+7(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
-       lhi     %r0,__LC_PGM_OLD_PSW
-       sth     %r0,SP_TRAP(%r15)       # set trap indication to pgm check
+       ni      __TI_flags+7(%r9),255-_TIF_SINGLE_STEP  # clear TIF_SINGLE_STEP
+       xc      SP_SVCNR(2,%r15),SP_SVCNR(%r15)         # clear svc number
        la      %r2,SP_PTREGS(%r15)     # address of register-save area
        larl    %r14,sysc_return        # load adr. of system return
        jg      do_single_step          # branch to do_sigtrap
@@ -389,7 +390,7 @@ sysc_tracesys:
        lghi    %r0,NR_syscalls
        clgr    %r0,%r2
        jnh     sysc_tracenogo
-       slag    %r7,%r2,2               # *4
+       sllg    %r7,%r2,2               # svc number *4
        lgf     %r8,0(%r7,%r10)
 sysc_tracego:
        lmg     %r3,%r6,SP_R3(%r15)
@@ -564,8 +565,7 @@ pgm_svcper:
 # per was called from kernel, must be kprobes
 #
 kernel_per:
-       lhi     %r0,__LC_PGM_OLD_PSW
-       sth     %r0,SP_TRAP(%r15)       # set trap indication to pgm check
+       xc      SP_SVCNR(2,%r15),SP_SVCNR(%r15) # clear svc number
        la      %r2,SP_PTREGS(%r15)     # address of register-save area
        larl    %r14,sysc_restore       # load adr. of system ret, no work
        jg      do_single_step          # branch to do_single_step