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-rw-r--r--arch/s390/kernel/entry64.S23
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
46SP_R15 = STACK_FRAME_OVERHEAD + __PT_GPRS + 120 46SP_R15 = STACK_FRAME_OVERHEAD + __PT_GPRS + 120
47SP_ORIG_R2 = STACK_FRAME_OVERHEAD + __PT_ORIG_GPR2 47SP_ORIG_R2 = STACK_FRAME_OVERHEAD + __PT_ORIG_GPR2
48SP_ILC = STACK_FRAME_OVERHEAD + __PT_ILC 48SP_ILC = STACK_FRAME_OVERHEAD + __PT_ILC
49SP_TRAP = STACK_FRAME_OVERHEAD + __PT_TRAP 49SP_SVCNR = STACK_FRAME_OVERHEAD + __PT_SVCNR
50SP_SIZE = STACK_FRAME_OVERHEAD + __PT_SIZE 50SP_SIZE = STACK_FRAME_OVERHEAD + __PT_SIZE
51 51
52STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER 52STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER
@@ -171,11 +171,10 @@ _TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
171 .macro CREATE_STACK_FRAME psworg,savearea 171 .macro CREATE_STACK_FRAME psworg,savearea
172 aghi %r15,-SP_SIZE # make room for registers & psw 172 aghi %r15,-SP_SIZE # make room for registers & psw
173 mvc SP_PSW(16,%r15),0(%r12) # move user PSW to stack 173 mvc SP_PSW(16,%r15),0(%r12) # move user PSW to stack
174 la %r12,\psworg
175 stg %r2,SP_ORIG_R2(%r15) # store original content of gpr 2 174 stg %r2,SP_ORIG_R2(%r15) # store original content of gpr 2
176 icm %r12,12,__LC_SVC_ILC 175 icm %r12,3,__LC_SVC_ILC
177 stmg %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack 176 stmg %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack
178 st %r12,SP_ILC(%r15) 177 st %r12,SP_SVCNR(%r15)
179 mvc SP_R12(32,%r15),\savearea # move %r12-%r15 to stack 178 mvc SP_R12(32,%r15),\savearea # move %r12-%r15 to stack
180 la %r12,0 179 la %r12,0
181 stg %r12,__SF_BACKCHAIN(%r15) 180 stg %r12,__SF_BACKCHAIN(%r15)
@@ -250,16 +249,17 @@ sysc_update:
250#endif 249#endif
251sysc_do_svc: 250sysc_do_svc:
252 lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct 251 lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
253 slag %r7,%r7,2 # *4 and test for svc 0 252 ltgr %r7,%r7 # test for svc 0
254 jnz sysc_nr_ok 253 jnz sysc_nr_ok
255 # svc 0: system call number in %r1 254 # svc 0: system call number in %r1
256 cl %r1,BASED(.Lnr_syscalls) 255 cl %r1,BASED(.Lnr_syscalls)
257 jnl sysc_nr_ok 256 jnl sysc_nr_ok
258 lgfr %r7,%r1 # clear high word in r1 257 lgfr %r7,%r1 # clear high word in r1
259 slag %r7,%r7,2 # svc 0: system call number in %r1
260sysc_nr_ok: 258sysc_nr_ok:
261 mvc SP_ARGS(8,%r15),SP_R7(%r15) 259 mvc SP_ARGS(8,%r15),SP_R7(%r15)
262sysc_do_restart: 260sysc_do_restart:
261 sth %r7,SP_SVCNR(%r15)
262 sllg %r7,%r7,2 # svc number * 4
263 larl %r10,sys_call_table 263 larl %r10,sys_call_table
264#ifdef CONFIG_COMPAT 264#ifdef CONFIG_COMPAT
265 tm __TI_flags+5(%r9),(_TIF_31BIT>>16) # running in 31 bit mode ? 265 tm __TI_flags+5(%r9),(_TIF_31BIT>>16) # running in 31 bit mode ?
@@ -363,7 +363,6 @@ sysc_notify_resume:
363sysc_restart: 363sysc_restart:
364 ni __TI_flags+7(%r9),255-_TIF_RESTART_SVC # clear TIF_RESTART_SVC 364 ni __TI_flags+7(%r9),255-_TIF_RESTART_SVC # clear TIF_RESTART_SVC
365 lg %r7,SP_R2(%r15) # load new svc number 365 lg %r7,SP_R2(%r15) # load new svc number
366 slag %r7,%r7,2 # *4
367 mvc SP_R2(8,%r15),SP_ORIG_R2(%r15) # restore first argument 366 mvc SP_R2(8,%r15),SP_ORIG_R2(%r15) # restore first argument
368 lmg %r2,%r6,SP_R2(%r15) # load svc arguments 367 lmg %r2,%r6,SP_R2(%r15) # load svc arguments
369 j sysc_do_restart # restart svc 368 j sysc_do_restart # restart svc
@@ -372,9 +371,8 @@ sysc_restart:
372# _TIF_SINGLE_STEP is set, call do_single_step 371# _TIF_SINGLE_STEP is set, call do_single_step
373# 372#
374sysc_singlestep: 373sysc_singlestep:
375 ni __TI_flags+7(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP 374 ni __TI_flags+7(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
376 lhi %r0,__LC_PGM_OLD_PSW 375 xc SP_SVCNR(2,%r15),SP_SVCNR(%r15) # clear svc number
377 sth %r0,SP_TRAP(%r15) # set trap indication to pgm check
378 la %r2,SP_PTREGS(%r15) # address of register-save area 376 la %r2,SP_PTREGS(%r15) # address of register-save area
379 larl %r14,sysc_return # load adr. of system return 377 larl %r14,sysc_return # load adr. of system return
380 jg do_single_step # branch to do_sigtrap 378 jg do_single_step # branch to do_sigtrap
@@ -392,7 +390,7 @@ sysc_tracesys:
392 lghi %r0,NR_syscalls 390 lghi %r0,NR_syscalls
393 clgr %r0,%r2 391 clgr %r0,%r2
394 jnh sysc_tracenogo 392 jnh sysc_tracenogo
395 slag %r7,%r2,2 # *4 393 sllg %r7,%r2,2 # svc number *4
396 lgf %r8,0(%r7,%r10) 394 lgf %r8,0(%r7,%r10)
397sysc_tracego: 395sysc_tracego:
398 lmg %r3,%r6,SP_R3(%r15) 396 lmg %r3,%r6,SP_R3(%r15)
@@ -567,8 +565,7 @@ pgm_svcper:
567# per was called from kernel, must be kprobes 565# per was called from kernel, must be kprobes
568# 566#
569kernel_per: 567kernel_per:
570 lhi %r0,__LC_PGM_OLD_PSW 568 xc SP_SVCNR(2,%r15),SP_SVCNR(%r15) # clear svc number
571 sth %r0,SP_TRAP(%r15) # set trap indication to pgm check
572 la %r2,SP_PTREGS(%r15) # address of register-save area 569 la %r2,SP_PTREGS(%r15) # address of register-save area
573 larl %r14,sysc_restore # load adr. of system ret, no work 570 larl %r14,sysc_restore # load adr. of system ret, no work
574 jg do_single_step # branch to do_single_step 571 jg do_single_step # branch to do_single_step