diff options
Diffstat (limited to 'arch/s390/kernel/entry64.S')
| -rw-r--r-- | arch/s390/kernel/entry64.S | 23 |
1 files changed, 10 insertions, 13 deletions
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S index 41aca06682aa..89c121ae6339 100644 --- 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 @@ -171,11 +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) @@ -250,16 +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 ? @@ -363,7 +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 @@ -372,9 +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 @@ -392,7 +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) @@ -567,8 +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 |