2 * arch/s390/kernel/entry.S
3 * S390 low-level entry points.
6 * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
7 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
8 * Hartmut Penner (hp@de.ibm.com),
9 * Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com),
12 #include <linux/sys.h>
13 #include <linux/linkage.h>
14 #include <linux/config.h>
15 #include <asm/cache.h>
16 #include <asm/lowcore.h>
17 #include <asm/errno.h>
18 #include <asm/ptrace.h>
19 #include <asm/thread_info.h>
20 #include <asm/offsets.h>
21 #include <asm/unistd.h>
25 * Stack layout for the system_call stack entry.
26 * The first few entries are identical to the user_regs_struct.
28 SP_PTREGS = STACK_FRAME_OVERHEAD
29 SP_ARGS = STACK_FRAME_OVERHEAD + __PT_ARGS
30 SP_PSW = STACK_FRAME_OVERHEAD + __PT_PSW
31 SP_R0 = STACK_FRAME_OVERHEAD + __PT_GPRS
32 SP_R1 = STACK_FRAME_OVERHEAD + __PT_GPRS + 4
33 SP_R2 = STACK_FRAME_OVERHEAD + __PT_GPRS + 8
34 SP_R3 = STACK_FRAME_OVERHEAD + __PT_GPRS + 12
35 SP_R4 = STACK_FRAME_OVERHEAD + __PT_GPRS + 16
36 SP_R5 = STACK_FRAME_OVERHEAD + __PT_GPRS + 20
37 SP_R6 = STACK_FRAME_OVERHEAD + __PT_GPRS + 24
38 SP_R7 = STACK_FRAME_OVERHEAD + __PT_GPRS + 28
39 SP_R8 = STACK_FRAME_OVERHEAD + __PT_GPRS + 32
40 SP_R9 = STACK_FRAME_OVERHEAD + __PT_GPRS + 36
41 SP_R10 = STACK_FRAME_OVERHEAD + __PT_GPRS + 40
42 SP_R11 = STACK_FRAME_OVERHEAD + __PT_GPRS + 44
43 SP_R12 = STACK_FRAME_OVERHEAD + __PT_GPRS + 48
44 SP_R13 = STACK_FRAME_OVERHEAD + __PT_GPRS + 52
45 SP_R14 = STACK_FRAME_OVERHEAD + __PT_GPRS + 56
46 SP_R15 = STACK_FRAME_OVERHEAD + __PT_GPRS + 60
47 SP_ORIG_R2 = STACK_FRAME_OVERHEAD + __PT_ORIG_GPR2
48 SP_ILC = STACK_FRAME_OVERHEAD + __PT_ILC
49 SP_TRAP = STACK_FRAME_OVERHEAD + __PT_TRAP
50 SP_SIZE = STACK_FRAME_OVERHEAD + __PT_SIZE
52 _TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
53 _TIF_RESTART_SVC | _TIF_SINGLE_STEP )
54 _TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NEED_RESCHED)
56 STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER
57 STACK_SIZE = 1 << STACK_SHIFT
59 #define BASED(name) name-system_call(%r13)
62 * Register usage in interrupt handlers:
63 * R9 - pointer to current task structure
64 * R13 - pointer to literal pool
65 * R14 - return register for function calls
66 * R15 - kernel stack pointer
69 .macro SAVE_ALL_BASE savearea
70 stm %r12,%r15,\savearea
71 l %r13,__LC_SVC_NEW_PSW+4 # load &system_call to %r13
74 .macro SAVE_ALL psworg,savearea,sync
77 tm \psworg+1,0x01 # test problem state bit
78 bz BASED(2f) # skip stack setup save
79 l %r15,__LC_KERNEL_STACK # problem state -> load ksp
81 tm \psworg+1,0x01 # test problem state bit
82 bnz BASED(1f) # from user -> load async stack
83 clc \psworg+4(4),BASED(.Lcritical_end)
85 clc \psworg+4(4),BASED(.Lcritical_start)
87 l %r14,BASED(.Lcleanup_critical)
89 tm 0(%r12),0x01 # retest problem state after cleanup
91 0: l %r14,__LC_ASYNC_STACK # are we already on the async stack ?
95 1: l %r15,__LC_ASYNC_STACK
97 #ifdef CONFIG_CHECK_STACK
99 2: tml %r15,STACK_SIZE - CONFIG_STACK_GUARD
100 bz BASED(stack_overflow)
103 2: s %r15,BASED(.Lc_spsize) # make room for registers & psw
104 mvc SP_PSW(8,%r15),0(%r12) # move user PSW to stack
106 st %r2,SP_ORIG_R2(%r15) # store original content of gpr 2
107 icm %r12,12,__LC_SVC_ILC
108 stm %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack
110 mvc SP_R12(16,%r15),\savearea # move %r12-%r15 to stack
112 st %r12,__SF_BACKCHAIN(%r15) # clear back chain
115 .macro RESTORE_ALL sync
116 mvc __LC_RETURN_PSW(8),SP_PSW(%r15) # move user PSW to lowcore
118 ni __LC_RETURN_PSW+1,0xfd # clear wait state bit
120 lm %r0,%r15,SP_R0(%r15) # load gprs 0-15 of user
121 lpsw __LC_RETURN_PSW # back to caller
125 * Scheduler resume function, called by switch_to
126 * gpr2 = (task_struct *) prev
127 * gpr3 = (task_struct *) next
135 tm __THREAD_per(%r3),0xe8 # new process is using per ?
136 bz __switch_to_noper-__switch_to_base(%r1) # if not we're fine
137 stctl %c9,%c11,__SF_EMPTY(%r15) # We are using per stuff
138 clc __THREAD_per(12,%r3),__SF_EMPTY(%r15)
139 be __switch_to_noper-__switch_to_base(%r1) # we got away w/o bashing TLB's
140 lctl %c9,%c11,__THREAD_per(%r3) # Nope we didn't
142 stm %r6,%r15,__SF_GPRS(%r15)# store __switch_to registers of prev task
143 st %r15,__THREAD_ksp(%r2) # store kernel stack to prev->tss.ksp
144 l %r15,__THREAD_ksp(%r3) # load kernel stack from next->tss.ksp
145 lm %r6,%r15,__SF_GPRS(%r15)# load __switch_to registers of next task
146 st %r3,__LC_CURRENT # __LC_CURRENT = current task struct
147 l %r3,__THREAD_info(%r3) # load thread_info from task struct
148 st %r3,__LC_THREAD_INFO
150 st %r3,__LC_KERNEL_STACK # __LC_KERNEL_STACK = new kernel stack
155 * SVC interrupt handler routine. System calls are synchronous events and
156 * are executed with interrupts enabled.
161 SAVE_ALL_BASE __LC_SAVE_AREA
162 SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
163 lh %r7,0x8a # get svc number from lowcore
165 l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
166 sla %r7,2 # *4 and test for svc 0
167 bnz BASED(sysc_nr_ok) # svc number > 0
168 # svc 0: system call number in %r1
169 cl %r1,BASED(.Lnr_syscalls)
170 bnl BASED(sysc_nr_ok)
171 lr %r7,%r1 # copy svc number to %r7
174 mvc SP_ARGS(4,%r15),SP_R7(%r15)
176 tm __TI_flags+3(%r9),(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)
177 l %r8,sys_call_table-system_call(%r7,%r13) # get system call addr.
178 bnz BASED(sysc_tracesys)
179 basr %r14,%r8 # call sys_xxxx
180 st %r2,SP_R2(%r15) # store return value (change R2 on stack)
181 # ATTENTION: check sys_execve_glue before
182 # changing anything here !!
185 tm SP_PSW+1(%r15),0x01 # returning to user ?
186 bno BASED(sysc_leave)
187 tm __TI_flags+3(%r9),_TIF_WORK_SVC
188 bnz BASED(sysc_work) # there is work to do (signals etc.)
193 # recheck if there is more work to do
196 tm __TI_flags+3(%r9),_TIF_WORK_SVC
197 bz BASED(sysc_leave) # there is no work to do
199 # One of the work bits is on. Find out which one.
202 tm __TI_flags+3(%r9),_TIF_NEED_RESCHED
203 bo BASED(sysc_reschedule)
204 tm __TI_flags+3(%r9),_TIF_SIGPENDING
205 bo BASED(sysc_sigpending)
206 tm __TI_flags+3(%r9),_TIF_RESTART_SVC
207 bo BASED(sysc_restart)
208 tm __TI_flags+3(%r9),_TIF_SINGLE_STEP
209 bo BASED(sysc_singlestep)
213 # _TIF_NEED_RESCHED is set, call schedule
216 l %r1,BASED(.Lschedule)
217 la %r14,BASED(sysc_work_loop)
218 br %r1 # call scheduler
221 # _TIF_SIGPENDING is set, call do_signal
224 ni __TI_flags+3(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
225 la %r2,SP_PTREGS(%r15) # load pt_regs
226 sr %r3,%r3 # clear *oldset
227 l %r1,BASED(.Ldo_signal)
228 basr %r14,%r1 # call do_signal
229 tm __TI_flags+3(%r9),_TIF_RESTART_SVC
230 bo BASED(sysc_restart)
231 b BASED(sysc_leave) # out of here, do NOT recheck
234 # _TIF_RESTART_SVC is set, set up registers and restart svc
237 ni __TI_flags+3(%r9),255-_TIF_RESTART_SVC # clear TIF_RESTART_SVC
238 l %r7,SP_R2(%r15) # load new svc number
240 mvc SP_R2(4,%r15),SP_ORIG_R2(%r15) # restore first argument
241 lm %r2,%r6,SP_R2(%r15) # load svc arguments
242 b BASED(sysc_do_restart) # restart svc
245 # _TIF_SINGLE_STEP is set, call do_single_step
248 ni __TI_flags+3(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
249 mvi SP_TRAP+1(%r15),0x28 # set trap indication to pgm check
250 la %r2,SP_PTREGS(%r15) # address of register-save area
251 l %r1,BASED(.Lhandle_per) # load adr. of per handler
252 la %r14,BASED(sysc_return) # load adr. of system return
253 br %r1 # branch to do_single_step
258 # call trace before and after sys_call
262 la %r2,SP_PTREGS(%r15) # load pt_regs
267 clc SP_R2(4,%r15),BASED(.Lnr_syscalls)
268 bnl BASED(sysc_tracenogo)
269 l %r7,SP_R2(%r15) # strace might have changed the
270 sll %r7,2 # system call
271 l %r8,sys_call_table-system_call(%r7,%r13)
273 lm %r3,%r6,SP_R3(%r15)
274 l %r2,SP_ORIG_R2(%r15)
275 basr %r14,%r8 # call sys_xxx
276 st %r2,SP_R2(%r15) # store return value
278 tm __TI_flags+3(%r9),(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)
279 bz BASED(sysc_return)
281 la %r2,SP_PTREGS(%r15) # load pt_regs
283 la %r14,BASED(sysc_return)
287 # a new process exits the kernel with ret_from_fork
291 l %r13,__LC_SVC_NEW_PSW+4
292 l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
293 tm SP_PSW+1(%r15),0x01 # forking a kernel thread ?
295 st %r15,SP_R15(%r15) # store stack pointer for new kthread
296 0: l %r1,BASED(.Lschedtail)
298 stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
302 # clone, fork, vfork, exec and sigreturn need glue,
303 # because they all expect pt_regs as parameter,
304 # but are called with different parameter.
305 # return-address is set up above
308 la %r2,SP_PTREGS(%r15) # load pt_regs
310 br %r1 # branch to sys_clone
313 la %r2,SP_PTREGS(%r15) # load pt_regs
315 br %r1 # branch to sys_fork
318 la %r2,SP_PTREGS(%r15) # load pt_regs
320 br %r1 # branch to sys_vfork
323 la %r2,SP_PTREGS(%r15) # load pt_regs
324 l %r1,BASED(.Lexecve)
325 lr %r12,%r14 # save return address
326 basr %r14,%r1 # call sys_execve
327 ltr %r2,%r2 # check if execve failed
328 bnz 0(%r12) # it did fail -> store result in gpr2
329 b 4(%r12) # SKIP ST 2,SP_R2(15) after BASR 14,8
330 # in system_call/sysc_tracesys
333 la %r2,SP_PTREGS(%r15) # load pt_regs as parameter
334 l %r1,BASED(.Lsigreturn)
335 br %r1 # branch to sys_sigreturn
337 sys_rt_sigreturn_glue:
338 la %r2,SP_PTREGS(%r15) # load pt_regs as parameter
339 l %r1,BASED(.Lrt_sigreturn)
340 br %r1 # branch to sys_sigreturn
343 # sigsuspend and rt_sigsuspend need pt_regs as an additional
344 # parameter and they have to skip the store of %r2 into the
345 # user register %r2 because the return value was set in
346 # sigsuspend and rt_sigsuspend already and must not be overwritten!
350 lr %r5,%r4 # move mask back
351 lr %r4,%r3 # move history1 parameter
352 lr %r3,%r2 # move history0 parameter
353 la %r2,SP_PTREGS(%r15) # load pt_regs as first parameter
354 l %r1,BASED(.Lsigsuspend)
355 la %r14,4(%r14) # skip store of return value
356 br %r1 # branch to sys_sigsuspend
358 sys_rt_sigsuspend_glue:
359 lr %r4,%r3 # move sigsetsize parameter
360 lr %r3,%r2 # move unewset parameter
361 la %r2,SP_PTREGS(%r15) # load pt_regs as first parameter
362 l %r1,BASED(.Lrt_sigsuspend)
363 la %r14,4(%r14) # skip store of return value
364 br %r1 # branch to sys_rt_sigsuspend
366 sys_sigaltstack_glue:
367 la %r4,SP_PTREGS(%r15) # load pt_regs as parameter
368 l %r1,BASED(.Lsigaltstack)
369 br %r1 # branch to sys_sigreturn
373 * Program check handler routine
376 .globl pgm_check_handler
379 * First we need to check for a special case:
380 * Single stepping an instruction that disables the PER event mask will
381 * cause a PER event AFTER the mask has been set. Example: SVC or LPSW.
382 * For a single stepped SVC the program check handler gets control after
383 * the SVC new PSW has been loaded. But we want to execute the SVC first and
384 * then handle the PER event. Therefore we update the SVC old PSW to point
385 * to the pgm_check_handler and branch to the SVC handler after we checked
386 * if we have to load the kernel stack register.
387 * For every other possible cause for PER event without the PER mask set
388 * we just ignore the PER event (FIXME: is there anything we have to do
391 SAVE_ALL_BASE __LC_SAVE_AREA
392 tm __LC_PGM_INT_CODE+1,0x80 # check whether we got a per exception
393 bnz BASED(pgm_per) # got per exception -> special case
394 SAVE_ALL __LC_PGM_OLD_PSW,__LC_SAVE_AREA,1
395 l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
396 l %r3,__LC_PGM_ILC # load program interruption code
400 l %r7,BASED(.Ljump_table)
402 l %r7,0(%r8,%r7) # load address of handler routine
403 la %r2,SP_PTREGS(%r15) # address of register-save area
404 la %r14,BASED(sysc_return)
405 br %r7 # branch to interrupt-handler
408 # handle per exception
411 tm __LC_PGM_OLD_PSW,0x40 # test if per event recording is on
412 bnz BASED(pgm_per_std) # ok, normal per event from user space
413 # ok its one of the special cases, now we need to find out which one
414 clc __LC_PGM_OLD_PSW(8),__LC_SVC_NEW_PSW
416 # no interesting special case, ignore PER event
417 lm %r12,%r15,__LC_SAVE_AREA
421 # Normal per exception
424 SAVE_ALL __LC_PGM_OLD_PSW,__LC_SAVE_AREA,1
425 l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
427 mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID
428 mvc __THREAD_per+__PER_address(4,%r1),__LC_PER_ADDRESS
429 mvc __THREAD_per+__PER_access_id(1,%r1),__LC_PER_ACCESS_ID
430 oi __TI_flags+3(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
431 l %r3,__LC_PGM_ILC # load program interruption code
433 nr %r8,%r3 # clear per-event-bit and ilc
434 be BASED(sysc_return) # only per or per+check ?
438 # it was a single stepped SVC that is causing all the trouble
441 SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
442 lh %r7,0x8a # get svc number from lowcore
443 l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
445 mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID
446 mvc __THREAD_per+__PER_address(4,%r1),__LC_PER_ADDRESS
447 mvc __THREAD_per+__PER_access_id(1,%r1),__LC_PER_ACCESS_ID
448 oi __TI_flags+3(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
449 stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
453 * IO interrupt handler routine
456 .globl io_int_handler
459 SAVE_ALL_BASE __LC_SAVE_AREA+16
460 SAVE_ALL __LC_IO_OLD_PSW,__LC_SAVE_AREA+16,0
461 l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
462 l %r1,BASED(.Ldo_IRQ) # load address of do_IRQ
463 la %r2,SP_PTREGS(%r15) # address of register-save area
464 basr %r14,%r1 # branch to standard irq handler
467 tm SP_PSW+1(%r15),0x01 # returning to user ?
468 #ifdef CONFIG_PREEMPT
469 bno BASED(io_preempt) # no -> check for preemptive scheduling
471 bno BASED(io_leave) # no-> skip resched & signal
473 tm __TI_flags+3(%r9),_TIF_WORK_INT
474 bnz BASED(io_work) # there is work to do (signals etc.)
478 #ifdef CONFIG_PREEMPT
480 icm %r0,15,__TI_precount(%r9)
483 s %r1,BASED(.Lc_spsize)
484 mvc SP_PTREGS(__PT_SIZE,%r1),SP_PTREGS(%r15)
485 xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1) # clear back chain
488 tm __TI_flags+3(%r9),_TIF_NEED_RESCHED
490 mvc __TI_precount(4,%r9),BASED(.Lc_pactive)
491 stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
492 l %r1,BASED(.Lschedule)
493 basr %r14,%r1 # call schedule
494 stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts
495 xc __TI_precount(4,%r9),__TI_precount(%r9)
496 b BASED(io_resume_loop)
500 # switch to kernel stack, then check the TIF bits
503 l %r1,__LC_KERNEL_STACK
504 s %r1,BASED(.Lc_spsize)
505 mvc SP_PTREGS(__PT_SIZE,%r1),SP_PTREGS(%r15)
506 xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1) # clear back chain
509 # One of the work bits is on. Find out which one.
510 # Checked are: _TIF_SIGPENDING and _TIF_NEED_RESCHED
513 tm __TI_flags+3(%r9),_TIF_NEED_RESCHED
514 bo BASED(io_reschedule)
515 tm __TI_flags+3(%r9),_TIF_SIGPENDING
516 bo BASED(io_sigpending)
520 # _TIF_NEED_RESCHED is set, call schedule
523 l %r1,BASED(.Lschedule)
524 stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
525 basr %r14,%r1 # call scheduler
526 stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts
527 tm __TI_flags+3(%r9),_TIF_WORK_INT
528 bz BASED(io_leave) # there is no work to do
529 b BASED(io_work_loop)
532 # _TIF_SIGPENDING is set, call do_signal
535 stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
536 la %r2,SP_PTREGS(%r15) # load pt_regs
537 sr %r3,%r3 # clear *oldset
538 l %r1,BASED(.Ldo_signal)
539 basr %r14,%r1 # call do_signal
540 stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts
541 b BASED(io_leave) # out of here, do NOT recheck
544 * External interrupt handler routine
547 .globl ext_int_handler
550 SAVE_ALL_BASE __LC_SAVE_AREA+16
551 SAVE_ALL __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16,0
552 l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
553 la %r2,SP_PTREGS(%r15) # address of register-save area
554 lh %r3,__LC_EXT_INT_CODE # get interruption code
555 l %r1,BASED(.Ldo_extint)
560 * Machine check handler routines
563 .globl mcck_int_handler
565 SAVE_ALL_BASE __LC_SAVE_AREA+32
566 SAVE_ALL __LC_MCK_OLD_PSW,__LC_SAVE_AREA+32,0
567 l %r1,BASED(.Ls390_mcck)
568 basr %r14,%r1 # call machine check handler
574 * Restart interruption handler, kick starter for additional CPUs
576 .globl restart_int_handler
578 l %r15,__LC_SAVE_AREA+60 # load ksp
579 lctl %c0,%c15,__LC_CREGS_SAVE_AREA # get new ctl regs
580 lam %a0,%a15,__LC_AREGS_SAVE_AREA
581 lm %r6,%r15,__SF_GPRS(%r15) # load registers from clone
582 stosm __SF_EMPTY(%r15),0x04 # now we can turn dat on
584 l %r14,restart_addr-.(%r14)
585 br %r14 # branch to start_secondary
587 .long start_secondary
590 * If we do not run with SMP enabled, let the new CPU crash ...
592 .globl restart_int_handler
596 lpsw restart_crash-restart_base(%r1)
599 .long 0x000a0000,0x00000000
603 #ifdef CONFIG_CHECK_STACK
605 * The synchronous or the asynchronous stack overflowed. We are dead.
606 * No need to properly save the registers, we are going to panic anyway.
607 * Setup a pt_regs so that show_trace can provide a good call trace.
610 l %r15,__LC_PANIC_STACK # change to panic stack
611 sl %r15,BASED(.Lc_spsize)
612 mvc SP_PSW(8,%r15),0(%r12) # move user PSW to stack
613 stm %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack
614 la %r1,__LC_SAVE_AREA
615 ch %r12,BASED(.L0x020) # old psw addr == __LC_SVC_OLD_PSW ?
617 ch %r12,BASED(.L0x028) # old psw addr == __LC_PGM_OLD_PSW ?
619 la %r1,__LC_SAVE_AREA+16
620 0: mvc SP_R12(16,%r15),0(%r1) # move %r12-%r15 to stack
621 xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) # clear back chain
622 l %r1,BASED(1f) # branch to kernel_stack_overflow
623 la %r2,SP_PTREGS(%r15) # load pt_regs
625 1: .long kernel_stack_overflow
628 cleanup_table_system_call:
629 .long system_call + 0x80000000, sysc_do_svc + 0x80000000
630 cleanup_table_sysc_return:
631 .long sysc_return + 0x80000000, sysc_leave + 0x80000000
632 cleanup_table_sysc_leave:
633 .long sysc_leave + 0x80000000, sysc_work_loop + 0x80000000
634 cleanup_table_sysc_work_loop:
635 .long sysc_work_loop + 0x80000000, sysc_reschedule + 0x80000000
638 clc 4(4,%r12),BASED(cleanup_table_system_call)
640 clc 4(4,%r12),BASED(cleanup_table_system_call+4)
641 bl BASED(cleanup_system_call)
643 clc 4(4,%r12),BASED(cleanup_table_sysc_return)
645 clc 4(4,%r12),BASED(cleanup_table_sysc_return+4)
646 bl BASED(cleanup_sysc_return)
648 clc 4(4,%r12),BASED(cleanup_table_sysc_leave)
650 clc 4(4,%r12),BASED(cleanup_table_sysc_leave+4)
651 bl BASED(cleanup_sysc_leave)
653 clc 4(4,%r12),BASED(cleanup_table_sysc_work_loop)
655 clc 4(4,%r12),BASED(cleanup_table_sysc_work_loop+4)
656 bl BASED(cleanup_sysc_leave)
661 mvc __LC_RETURN_PSW(4),0(%r12)
662 clc 4(4,%r12),BASED(cleanup_table_system_call)
664 mvc __LC_SAVE_AREA(16),__LC_SAVE_AREA+16
665 0: st %r13,__LC_SAVE_AREA+20
666 SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
667 st %r15,__LC_SAVE_AREA+28
669 mvc __LC_RETURN_PSW+4(4),BASED(cleanup_table_system_call+4)
670 la %r12,__LC_RETURN_PSW
674 mvc __LC_RETURN_PSW(4),0(%r12)
675 mvc __LC_RETURN_PSW+4(4),BASED(cleanup_table_sysc_return)
676 la %r12,__LC_RETURN_PSW
680 clc 4(4,%r12),BASED(cleanup_sysc_leave_lpsw)
682 mvc __LC_RETURN_PSW(8),SP_PSW(%r15)
683 mvc __LC_SAVE_AREA+16(16),SP_R12(%r15)
684 lm %r0,%r11,SP_R0(%r15)
686 0: la %r12,__LC_RETURN_PSW
688 cleanup_sysc_leave_lpsw:
689 .long sysc_leave + 10 + 0x80000000
695 .Lc_spsize: .long SP_SIZE
696 .Lc_overhead: .long STACK_FRAME_OVERHEAD
697 .Lc_pactive: .long PREEMPT_ACTIVE
698 .Lnr_syscalls: .long NR_syscalls
699 .L0x018: .short 0x018
700 .L0x020: .short 0x020
701 .L0x028: .short 0x028
702 .L0x030: .short 0x030
703 .L0x038: .short 0x038
708 .Ls390_mcck: .long s390_do_machine_check
709 .Ldo_IRQ: .long do_IRQ
710 .Ldo_extint: .long do_extint
711 .Ldo_signal: .long do_signal
712 .Lhandle_per: .long do_single_step
713 .Ljump_table: .long pgm_check_table
714 .Lschedule: .long schedule
715 .Lclone: .long sys_clone
716 .Lexecve: .long sys_execve
717 .Lfork: .long sys_fork
718 .Lrt_sigreturn:.long sys_rt_sigreturn
720 .long sys_rt_sigsuspend
721 .Lsigreturn: .long sys_sigreturn
722 .Lsigsuspend: .long sys_sigsuspend
723 .Lsigaltstack: .long sys_sigaltstack
724 .Ltrace: .long syscall_trace
725 .Lvfork: .long sys_vfork
726 .Lschedtail: .long schedule_tail
729 .long __critical_start + 0x80000000
731 .long __critical_end + 0x80000000
733 .long cleanup_critical
735 #define SYSCALL(esa,esame,emu) .long esa
736 .globl sys_call_table
738 #include "syscalls.S"