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 lctl %c4,%c4,__TASK_pid(%r3) # load pid to control reg. 4
148 l %r3,__THREAD_info(%r3) # load thread_info from task struct
149 st %r3,__LC_THREAD_INFO
151 st %r3,__LC_KERNEL_STACK # __LC_KERNEL_STACK = new kernel stack
156 * SVC interrupt handler routine. System calls are synchronous events and
157 * are executed with interrupts enabled.
162 SAVE_ALL_BASE __LC_SAVE_AREA
163 SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
164 lh %r7,0x8a # get svc number from lowcore
166 l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
167 sla %r7,2 # *4 and test for svc 0
168 bnz BASED(sysc_nr_ok) # svc number > 0
169 # svc 0: system call number in %r1
170 cl %r1,BASED(.Lnr_syscalls)
171 bnl BASED(sysc_nr_ok)
172 lr %r7,%r1 # copy svc number to %r7
175 mvc SP_ARGS(4,%r15),SP_R7(%r15)
177 tm __TI_flags+3(%r9),(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)
178 l %r8,sys_call_table-system_call(%r7,%r13) # get system call addr.
179 bnz BASED(sysc_tracesys)
180 basr %r14,%r8 # call sys_xxxx
181 st %r2,SP_R2(%r15) # store return value (change R2 on stack)
182 # ATTENTION: check sys_execve_glue before
183 # changing anything here !!
186 tm SP_PSW+1(%r15),0x01 # returning to user ?
187 bno BASED(sysc_leave)
188 tm __TI_flags+3(%r9),_TIF_WORK_SVC
189 bnz BASED(sysc_work) # there is work to do (signals etc.)
194 # recheck if there is more work to do
197 tm __TI_flags+3(%r9),_TIF_WORK_SVC
198 bz BASED(sysc_leave) # there is no work to do
200 # One of the work bits is on. Find out which one.
203 tm __TI_flags+3(%r9),_TIF_NEED_RESCHED
204 bo BASED(sysc_reschedule)
205 tm __TI_flags+3(%r9),_TIF_SIGPENDING
206 bo BASED(sysc_sigpending)
207 tm __TI_flags+3(%r9),_TIF_RESTART_SVC
208 bo BASED(sysc_restart)
209 tm __TI_flags+3(%r9),_TIF_SINGLE_STEP
210 bo BASED(sysc_singlestep)
214 # _TIF_NEED_RESCHED is set, call schedule
217 l %r1,BASED(.Lschedule)
218 la %r14,BASED(sysc_work_loop)
219 br %r1 # call scheduler
222 # _TIF_SIGPENDING is set, call do_signal
225 ni __TI_flags+3(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
226 la %r2,SP_PTREGS(%r15) # load pt_regs
227 sr %r3,%r3 # clear *oldset
228 l %r1,BASED(.Ldo_signal)
229 basr %r14,%r1 # call do_signal
230 tm __TI_flags+3(%r9),_TIF_RESTART_SVC
231 bo BASED(sysc_restart)
232 tm __TI_flags+3(%r9),_TIF_SINGLE_STEP
233 bo BASED(sysc_singlestep)
234 b BASED(sysc_leave) # out of here, do NOT recheck
237 # _TIF_RESTART_SVC is set, set up registers and restart svc
240 ni __TI_flags+3(%r9),255-_TIF_RESTART_SVC # clear TIF_RESTART_SVC
241 l %r7,SP_R2(%r15) # load new svc number
243 mvc SP_R2(4,%r15),SP_ORIG_R2(%r15) # restore first argument
244 lm %r2,%r6,SP_R2(%r15) # load svc arguments
245 b BASED(sysc_do_restart) # restart svc
248 # _TIF_SINGLE_STEP is set, call do_single_step
251 ni __TI_flags+3(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
252 mvi SP_TRAP+1(%r15),0x28 # set trap indication to pgm check
253 la %r2,SP_PTREGS(%r15) # address of register-save area
254 l %r1,BASED(.Lhandle_per) # load adr. of per handler
255 la %r14,BASED(sysc_return) # load adr. of system return
256 br %r1 # branch to do_single_step
261 # call trace before and after sys_call
265 la %r2,SP_PTREGS(%r15) # load pt_regs
270 clc SP_R2(4,%r15),BASED(.Lnr_syscalls)
271 bnl BASED(sysc_tracenogo)
272 l %r7,SP_R2(%r15) # strace might have changed the
273 sll %r7,2 # system call
274 l %r8,sys_call_table-system_call(%r7,%r13)
276 lm %r3,%r6,SP_R3(%r15)
277 l %r2,SP_ORIG_R2(%r15)
278 basr %r14,%r8 # call sys_xxx
279 st %r2,SP_R2(%r15) # store return value
281 tm __TI_flags+3(%r9),(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)
282 bz BASED(sysc_return)
284 la %r2,SP_PTREGS(%r15) # load pt_regs
286 la %r14,BASED(sysc_return)
290 # a new process exits the kernel with ret_from_fork
294 l %r13,__LC_SVC_NEW_PSW+4
295 l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
296 tm SP_PSW+1(%r15),0x01 # forking a kernel thread ?
298 st %r15,SP_R15(%r15) # store stack pointer for new kthread
299 0: l %r1,BASED(.Lschedtail)
301 stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
305 # clone, fork, vfork, exec and sigreturn need glue,
306 # because they all expect pt_regs as parameter,
307 # but are called with different parameter.
308 # return-address is set up above
311 la %r2,SP_PTREGS(%r15) # load pt_regs
313 br %r1 # branch to sys_clone
316 la %r2,SP_PTREGS(%r15) # load pt_regs
318 br %r1 # branch to sys_fork
321 la %r2,SP_PTREGS(%r15) # load pt_regs
323 br %r1 # branch to sys_vfork
326 la %r2,SP_PTREGS(%r15) # load pt_regs
327 l %r1,BASED(.Lexecve)
328 lr %r12,%r14 # save return address
329 basr %r14,%r1 # call sys_execve
330 ltr %r2,%r2 # check if execve failed
331 bnz 0(%r12) # it did fail -> store result in gpr2
332 b 4(%r12) # SKIP ST 2,SP_R2(15) after BASR 14,8
333 # in system_call/sysc_tracesys
336 la %r2,SP_PTREGS(%r15) # load pt_regs as parameter
337 l %r1,BASED(.Lsigreturn)
338 br %r1 # branch to sys_sigreturn
340 sys_rt_sigreturn_glue:
341 la %r2,SP_PTREGS(%r15) # load pt_regs as parameter
342 l %r1,BASED(.Lrt_sigreturn)
343 br %r1 # branch to sys_sigreturn
346 # sigsuspend and rt_sigsuspend need pt_regs as an additional
347 # parameter and they have to skip the store of %r2 into the
348 # user register %r2 because the return value was set in
349 # sigsuspend and rt_sigsuspend already and must not be overwritten!
353 lr %r5,%r4 # move mask back
354 lr %r4,%r3 # move history1 parameter
355 lr %r3,%r2 # move history0 parameter
356 la %r2,SP_PTREGS(%r15) # load pt_regs as first parameter
357 l %r1,BASED(.Lsigsuspend)
358 la %r14,4(%r14) # skip store of return value
359 br %r1 # branch to sys_sigsuspend
361 sys_rt_sigsuspend_glue:
362 lr %r4,%r3 # move sigsetsize parameter
363 lr %r3,%r2 # move unewset parameter
364 la %r2,SP_PTREGS(%r15) # load pt_regs as first parameter
365 l %r1,BASED(.Lrt_sigsuspend)
366 la %r14,4(%r14) # skip store of return value
367 br %r1 # branch to sys_rt_sigsuspend
369 sys_sigaltstack_glue:
370 la %r4,SP_PTREGS(%r15) # load pt_regs as parameter
371 l %r1,BASED(.Lsigaltstack)
372 br %r1 # branch to sys_sigreturn
376 * Program check handler routine
379 .globl pgm_check_handler
382 * First we need to check for a special case:
383 * Single stepping an instruction that disables the PER event mask will
384 * cause a PER event AFTER the mask has been set. Example: SVC or LPSW.
385 * For a single stepped SVC the program check handler gets control after
386 * the SVC new PSW has been loaded. But we want to execute the SVC first and
387 * then handle the PER event. Therefore we update the SVC old PSW to point
388 * to the pgm_check_handler and branch to the SVC handler after we checked
389 * if we have to load the kernel stack register.
390 * For every other possible cause for PER event without the PER mask set
391 * we just ignore the PER event (FIXME: is there anything we have to do
394 SAVE_ALL_BASE __LC_SAVE_AREA
395 tm __LC_PGM_INT_CODE+1,0x80 # check whether we got a per exception
396 bnz BASED(pgm_per) # got per exception -> special case
397 SAVE_ALL __LC_PGM_OLD_PSW,__LC_SAVE_AREA,1
398 l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
399 l %r3,__LC_PGM_ILC # load program interruption code
403 l %r7,BASED(.Ljump_table)
405 l %r7,0(%r8,%r7) # load address of handler routine
406 la %r2,SP_PTREGS(%r15) # address of register-save area
407 la %r14,BASED(sysc_return)
408 br %r7 # branch to interrupt-handler
411 # handle per exception
414 tm __LC_PGM_OLD_PSW,0x40 # test if per event recording is on
415 bnz BASED(pgm_per_std) # ok, normal per event from user space
416 # ok its one of the special cases, now we need to find out which one
417 clc __LC_PGM_OLD_PSW(8),__LC_SVC_NEW_PSW
419 # no interesting special case, ignore PER event
420 lm %r12,%r15,__LC_SAVE_AREA
424 # Normal per exception
427 SAVE_ALL __LC_PGM_OLD_PSW,__LC_SAVE_AREA,1
428 l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
430 mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID
431 mvc __THREAD_per+__PER_address(4,%r1),__LC_PER_ADDRESS
432 mvc __THREAD_per+__PER_access_id(1,%r1),__LC_PER_ACCESS_ID
433 oi __TI_flags+3(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
434 l %r3,__LC_PGM_ILC # load program interruption code
436 nr %r8,%r3 # clear per-event-bit and ilc
437 be BASED(sysc_return) # only per or per+check ?
441 # it was a single stepped SVC that is causing all the trouble
444 SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
445 lh %r7,0x8a # get svc number from lowcore
446 l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
448 mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID
449 mvc __THREAD_per+__PER_address(4,%r1),__LC_PER_ADDRESS
450 mvc __THREAD_per+__PER_access_id(1,%r1),__LC_PER_ACCESS_ID
451 oi __TI_flags+3(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
452 stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
456 * IO interrupt handler routine
459 .globl io_int_handler
462 SAVE_ALL_BASE __LC_SAVE_AREA+16
463 SAVE_ALL __LC_IO_OLD_PSW,__LC_SAVE_AREA+16,0
464 l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
465 l %r1,BASED(.Ldo_IRQ) # load address of do_IRQ
466 la %r2,SP_PTREGS(%r15) # address of register-save area
467 basr %r14,%r1 # branch to standard irq handler
470 tm SP_PSW+1(%r15),0x01 # returning to user ?
471 #ifdef CONFIG_PREEMPT
472 bno BASED(io_preempt) # no -> check for preemptive scheduling
474 bno BASED(io_leave) # no-> skip resched & signal
476 tm __TI_flags+3(%r9),_TIF_WORK_INT
477 bnz BASED(io_work) # there is work to do (signals etc.)
481 #ifdef CONFIG_PREEMPT
483 icm %r0,15,__TI_precount(%r9)
486 s %r1,BASED(.Lc_spsize)
487 mvc SP_PTREGS(__PT_SIZE,%r1),SP_PTREGS(%r15)
488 xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1) # clear back chain
491 tm __TI_flags+3(%r9),_TIF_NEED_RESCHED
493 mvc __TI_precount(4,%r9),BASED(.Lc_pactive)
494 stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
495 l %r1,BASED(.Lschedule)
496 basr %r14,%r1 # call schedule
497 stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts
498 xc __TI_precount(4,%r9),__TI_precount(%r9)
499 b BASED(io_resume_loop)
503 # switch to kernel stack, then check the TIF bits
506 l %r1,__LC_KERNEL_STACK
507 s %r1,BASED(.Lc_spsize)
508 mvc SP_PTREGS(__PT_SIZE,%r1),SP_PTREGS(%r15)
509 xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1) # clear back chain
512 # One of the work bits is on. Find out which one.
513 # Checked are: _TIF_SIGPENDING and _TIF_NEED_RESCHED
516 tm __TI_flags+3(%r9),_TIF_NEED_RESCHED
517 bo BASED(io_reschedule)
518 tm __TI_flags+3(%r9),_TIF_SIGPENDING
519 bo BASED(io_sigpending)
523 # _TIF_NEED_RESCHED is set, call schedule
526 l %r1,BASED(.Lschedule)
527 stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
528 basr %r14,%r1 # call scheduler
529 stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts
530 tm __TI_flags+3(%r9),_TIF_WORK_INT
531 bz BASED(io_leave) # there is no work to do
532 b BASED(io_work_loop)
535 # _TIF_SIGPENDING is set, call do_signal
538 stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
539 la %r2,SP_PTREGS(%r15) # load pt_regs
540 sr %r3,%r3 # clear *oldset
541 l %r1,BASED(.Ldo_signal)
542 basr %r14,%r1 # call do_signal
543 stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts
544 b BASED(io_leave) # out of here, do NOT recheck
547 * External interrupt handler routine
550 .globl ext_int_handler
553 SAVE_ALL_BASE __LC_SAVE_AREA+16
554 SAVE_ALL __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16,0
555 l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
556 la %r2,SP_PTREGS(%r15) # address of register-save area
557 lh %r3,__LC_EXT_INT_CODE # get interruption code
558 l %r1,BASED(.Ldo_extint)
563 * Machine check handler routines
566 .globl mcck_int_handler
568 SAVE_ALL_BASE __LC_SAVE_AREA+32
569 SAVE_ALL __LC_MCK_OLD_PSW,__LC_SAVE_AREA+32,0
570 l %r1,BASED(.Ls390_mcck)
571 basr %r14,%r1 # call machine check handler
577 * Restart interruption handler, kick starter for additional CPUs
579 .globl restart_int_handler
581 l %r15,__LC_SAVE_AREA+60 # load ksp
582 lctl %c0,%c15,__LC_CREGS_SAVE_AREA # get new ctl regs
583 lam %a0,%a15,__LC_AREGS_SAVE_AREA
584 lm %r6,%r15,__SF_GPRS(%r15) # load registers from clone
585 stosm __SF_EMPTY(%r15),0x04 # now we can turn dat on
587 l %r14,restart_addr-.(%r14)
588 br %r14 # branch to start_secondary
590 .long start_secondary
593 * If we do not run with SMP enabled, let the new CPU crash ...
595 .globl restart_int_handler
599 lpsw restart_crash-restart_base(%r1)
602 .long 0x000a0000,0x00000000
606 #ifdef CONFIG_CHECK_STACK
608 * The synchronous or the asynchronous stack overflowed. We are dead.
609 * No need to properly save the registers, we are going to panic anyway.
610 * Setup a pt_regs so that show_trace can provide a good call trace.
613 l %r15,__LC_PANIC_STACK # change to panic stack
614 sl %r15,BASED(.Lc_spsize)
615 mvc SP_PSW(8,%r15),0(%r12) # move user PSW to stack
616 stm %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack
617 la %r1,__LC_SAVE_AREA
618 ch %r12,BASED(.L0x020) # old psw addr == __LC_SVC_OLD_PSW ?
620 ch %r12,BASED(.L0x028) # old psw addr == __LC_PGM_OLD_PSW ?
622 la %r1,__LC_SAVE_AREA+16
623 0: mvc SP_R12(16,%r15),0(%r1) # move %r12-%r15 to stack
624 xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) # clear back chain
625 l %r1,BASED(1f) # branch to kernel_stack_overflow
626 la %r2,SP_PTREGS(%r15) # load pt_regs
628 1: .long kernel_stack_overflow
631 cleanup_table_system_call:
632 .long system_call + 0x80000000, sysc_do_svc + 0x80000000
633 cleanup_table_sysc_return:
634 .long sysc_return + 0x80000000, sysc_leave + 0x80000000
635 cleanup_table_sysc_leave:
636 .long sysc_leave + 0x80000000, sysc_work_loop + 0x80000000
637 cleanup_table_sysc_work_loop:
638 .long sysc_work_loop + 0x80000000, sysc_reschedule + 0x80000000
641 clc 4(4,%r12),BASED(cleanup_table_system_call)
643 clc 4(4,%r12),BASED(cleanup_table_system_call+4)
644 bl BASED(cleanup_system_call)
646 clc 4(4,%r12),BASED(cleanup_table_sysc_return)
648 clc 4(4,%r12),BASED(cleanup_table_sysc_return+4)
649 bl BASED(cleanup_sysc_return)
651 clc 4(4,%r12),BASED(cleanup_table_sysc_leave)
653 clc 4(4,%r12),BASED(cleanup_table_sysc_leave+4)
654 bl BASED(cleanup_sysc_leave)
656 clc 4(4,%r12),BASED(cleanup_table_sysc_work_loop)
658 clc 4(4,%r12),BASED(cleanup_table_sysc_work_loop+4)
659 bl BASED(cleanup_sysc_leave)
664 mvc __LC_RETURN_PSW(4),0(%r12)
665 clc 4(4,%r12),BASED(cleanup_table_system_call)
667 mvc __LC_SAVE_AREA(16),__LC_SAVE_AREA+16
668 0: st %r13,__LC_SAVE_AREA+20
669 SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
670 st %r15,__LC_SAVE_AREA+28
672 mvc __LC_RETURN_PSW+4(4),BASED(cleanup_table_system_call+4)
673 la %r12,__LC_RETURN_PSW
677 mvc __LC_RETURN_PSW(4),0(%r12)
678 mvc __LC_RETURN_PSW+4(4),BASED(cleanup_table_sysc_return)
679 la %r12,__LC_RETURN_PSW
683 clc 4(4,%r12),BASED(cleanup_sysc_leave_lpsw)
685 mvc __LC_RETURN_PSW(8),SP_PSW(%r15)
686 mvc __LC_SAVE_AREA+16(16),SP_R12(%r15)
687 lm %r0,%r11,SP_R0(%r15)
689 0: la %r12,__LC_RETURN_PSW
691 cleanup_sysc_leave_lpsw:
692 .long sysc_leave + 10 + 0x80000000
698 .Lc_spsize: .long SP_SIZE
699 .Lc_overhead: .long STACK_FRAME_OVERHEAD
700 .Lc_pactive: .long PREEMPT_ACTIVE
701 .Lnr_syscalls: .long NR_syscalls
702 .L0x018: .short 0x018
703 .L0x020: .short 0x020
704 .L0x028: .short 0x028
705 .L0x030: .short 0x030
706 .L0x038: .short 0x038
711 .Ls390_mcck: .long s390_do_machine_check
712 .Ldo_IRQ: .long do_IRQ
713 .Ldo_extint: .long do_extint
714 .Ldo_signal: .long do_signal
715 .Lhandle_per: .long do_single_step
716 .Ljump_table: .long pgm_check_table
717 .Lschedule: .long schedule
718 .Lclone: .long sys_clone
719 .Lexecve: .long sys_execve
720 .Lfork: .long sys_fork
721 .Lrt_sigreturn:.long sys_rt_sigreturn
723 .long sys_rt_sigsuspend
724 .Lsigreturn: .long sys_sigreturn
725 .Lsigsuspend: .long sys_sigsuspend
726 .Lsigaltstack: .long sys_sigaltstack
727 .Ltrace: .long syscall_trace
728 .Lvfork: .long sys_vfork
729 .Lschedtail: .long schedule_tail
732 .long __critical_start + 0x80000000
734 .long __critical_end + 0x80000000
736 .long cleanup_critical
738 #define SYSCALL(esa,esame,emu) .long esa
739 .globl sys_call_table
741 #include "syscalls.S"