diff options
author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2011-01-05 12:47:57 +0100 |
---|---|---|
committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2011-01-05 12:47:29 +0100 |
commit | 1de3447a41ea72972966b4896a9f8d2b064bd23f (patch) | |
tree | 83683c7202f17797a09697956243a2b4745aab86 /arch | |
parent | ce322ccd53f2505cf8b0ed204631d6ac054ac66a (diff) | |
download | op-kernel-dev-1de3447a41ea72972966b4896a9f8d2b064bd23f.zip op-kernel-dev-1de3447a41ea72972966b4896a9f8d2b064bd23f.tar.gz |
[S390] 31 bit entry.S update.
Make the code in the 31 bit entry.S code as similar as possible to the
64 bit version in entry64.S. That makes it easier to add new code to
the first level interrupt handler that affects both 31 and 64 bit kernels.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/s390/kernel/entry.S | 212 |
1 files changed, 109 insertions, 103 deletions
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index 68d1a02..af8bd3b 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -9,7 +9,6 @@ * Heiko Carstens <heiko.carstens@de.ibm.com> */ -#include <linux/sys.h> #include <linux/linkage.h> #include <linux/init.h> #include <asm/cache.h> @@ -110,31 +109,36 @@ STACK_SIZE = 1 << STACK_SHIFT 1: stm %r10,%r11,\lc_sum .endm - .macro SAVE_ALL_BASE savearea + .macro SAVE_ALL_SVC psworg,savearea stm %r12,%r15,\savearea l %r13,__LC_SVC_NEW_PSW+4 # load &system_call to %r13 + l %r15,__LC_KERNEL_STACK # problem state -> load ksp + s %r15,BASED(.Lc_spsize) # make room for registers & psw .endm - .macro SAVE_ALL_SVC psworg,savearea - la %r12,\psworg - l %r15,__LC_KERNEL_STACK # problem state -> load ksp + .macro SAVE_ALL_BASE savearea + stm %r12,%r15,\savearea + l %r13,__LC_SVC_NEW_PSW+4 # load &system_call to %r13 .endm - .macro SAVE_ALL_SYNC psworg,savearea - la %r12,\psworg + .macro SAVE_ALL_PGM psworg,savearea tm \psworg+1,0x01 # test problem state bit - bz BASED(2f) # skip stack setup save - l %r15,__LC_KERNEL_STACK # problem state -> load ksp #ifdef CONFIG_CHECK_STACK - b BASED(3f) -2: tml %r15,STACK_SIZE - CONFIG_STACK_GUARD - bz BASED(stack_overflow) -3: + bnz BASED(1f) + tml %r15,STACK_SIZE - CONFIG_STACK_GUARD + bnz BASED(2f) + la %r12,\psworg + b BASED(stack_overflow) +#else + bz BASED(2f) #endif -2: +1: l %r15,__LC_KERNEL_STACK # problem state -> load ksp +2: s %r15,BASED(.Lc_spsize) # make room for registers & psw .endm .macro SAVE_ALL_ASYNC psworg,savearea + stm %r12,%r15,\savearea + l %r13,__LC_SVC_NEW_PSW+4 # load &system_call to %r13 la %r12,\psworg tm \psworg+1,0x01 # test problem state bit bnz BASED(1f) # from user -> load async stack @@ -149,27 +153,23 @@ STACK_SIZE = 1 << STACK_SHIFT 0: l %r14,__LC_ASYNC_STACK # are we already on the async stack ? slr %r14,%r15 sra %r14,STACK_SHIFT - be BASED(2f) -1: l %r15,__LC_ASYNC_STACK #ifdef CONFIG_CHECK_STACK - b BASED(3f) -2: tml %r15,STACK_SIZE - CONFIG_STACK_GUARD - bz BASED(stack_overflow) -3: + bnz BASED(1f) + tml %r15,STACK_SIZE - CONFIG_STACK_GUARD + bnz BASED(2f) + b BASED(stack_overflow) +#else + bz BASED(2f) #endif -2: +1: l %r15,__LC_ASYNC_STACK +2: s %r15,BASED(.Lc_spsize) # make room for registers & psw .endm - .macro CREATE_STACK_FRAME psworg,savearea - s %r15,BASED(.Lc_spsize) # make room for registers & psw - mvc SP_PSW(8,%r15),0(%r12) # move user PSW to stack + .macro CREATE_STACK_FRAME savearea + xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) st %r2,SP_ORIG_R2(%r15) # store original content of gpr 2 - icm %r12,12,__LC_SVC_ILC - stm %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack - st %r12,SP_ILC(%r15) mvc SP_R12(16,%r15),\savearea # move %r12-%r15 to stack - la %r12,0 - st %r12,__SF_BACKCHAIN(%r15) # clear back chain + stm %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack .endm .macro RESTORE_ALL psworg,sync @@ -237,10 +237,11 @@ __critical_start: system_call: stpt __LC_SYNC_ENTER_TIMER sysc_saveall: - SAVE_ALL_BASE __LC_SAVE_AREA SAVE_ALL_SVC __LC_SVC_OLD_PSW,__LC_SAVE_AREA - CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA - lh %r7,0x8a # get svc number from lowcore + CREATE_STACK_FRAME __LC_SAVE_AREA + mvc SP_PSW(8,%r15),__LC_SVC_OLD_PSW + mvc SP_ILC(4,%r15),__LC_SVC_ILC + l %r12,__LC_THREAD_INFO # load pointer to thread_info struct sysc_vtime: UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER sysc_stime: @@ -248,20 +249,20 @@ sysc_stime: sysc_update: mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER sysc_do_svc: - l %r9,__LC_THREAD_INFO # load pointer to thread_info struct - ltr %r7,%r7 # test for svc 0 + xr %r7,%r7 + icm %r7,3,SP_SVCNR(%r15) # load svc number and test for svc 0 bnz BASED(sysc_nr_ok) # svc number > 0 # svc 0: system call number in %r1 cl %r1,BASED(.Lnr_syscalls) bnl BASED(sysc_nr_ok) + sth %r1,SP_SVCNR(%r15) lr %r7,%r1 # copy svc number to %r7 sysc_nr_ok: - sth %r7,SP_SVCNR(%r15) sll %r7,2 # svc number *4 - l %r8,BASED(.Lsysc_table) - tm __TI_flags+2(%r9),_TIF_SYSCALL + l %r10,BASED(.Lsysc_table) + tm __TI_flags+2(%r12),_TIF_SYSCALL mvc SP_ARGS(4,%r15),SP_R7(%r15) - l %r8,0(%r7,%r8) # get system call addr. + l %r8,0(%r7,%r10) # get system call addr. bnz BASED(sysc_tracesys) basr %r14,%r8 # call sys_xxxx st %r2,SP_R2(%r15) # store return value (change R2 on stack) @@ -269,7 +270,7 @@ sysc_nr_ok: sysc_return: LOCKDEP_SYS_EXIT sysc_tif: - tm __TI_flags+3(%r9),_TIF_WORK_SVC + tm __TI_flags+3(%r12),_TIF_WORK_SVC bnz BASED(sysc_work) # there is work to do (signals etc.) sysc_restore: RESTORE_ALL __LC_RETURN_PSW,1 @@ -286,17 +287,17 @@ sysc_work: # One of the work bits is on. Find out which one. # sysc_work_tif: - tm __TI_flags+3(%r9),_TIF_MCCK_PENDING + tm __TI_flags+3(%r12),_TIF_MCCK_PENDING bo BASED(sysc_mcck_pending) - tm __TI_flags+3(%r9),_TIF_NEED_RESCHED + tm __TI_flags+3(%r12),_TIF_NEED_RESCHED bo BASED(sysc_reschedule) - tm __TI_flags+3(%r9),_TIF_SIGPENDING + tm __TI_flags+3(%r12),_TIF_SIGPENDING bo BASED(sysc_sigpending) - tm __TI_flags+3(%r9),_TIF_NOTIFY_RESUME + tm __TI_flags+3(%r12),_TIF_NOTIFY_RESUME bo BASED(sysc_notify_resume) - tm __TI_flags+3(%r9),_TIF_RESTART_SVC + tm __TI_flags+3(%r12),_TIF_RESTART_SVC bo BASED(sysc_restart) - tm __TI_flags+3(%r9),_TIF_SINGLE_STEP + tm __TI_flags+3(%r12),_TIF_SINGLE_STEP bo BASED(sysc_singlestep) b BASED(sysc_return) # beware of critical section cleanup @@ -320,13 +321,13 @@ sysc_mcck_pending: # _TIF_SIGPENDING is set, call do_signal # sysc_sigpending: - ni __TI_flags+3(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP + ni __TI_flags+3(%r12),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP la %r2,SP_PTREGS(%r15) # load pt_regs l %r1,BASED(.Ldo_signal) basr %r14,%r1 # call do_signal - tm __TI_flags+3(%r9),_TIF_RESTART_SVC + tm __TI_flags+3(%r12),_TIF_RESTART_SVC bo BASED(sysc_restart) - tm __TI_flags+3(%r9),_TIF_SINGLE_STEP + tm __TI_flags+3(%r12),_TIF_SINGLE_STEP bo BASED(sysc_singlestep) b BASED(sysc_return) @@ -344,19 +345,19 @@ sysc_notify_resume: # _TIF_RESTART_SVC is set, set up registers and restart svc # sysc_restart: - ni __TI_flags+3(%r9),255-_TIF_RESTART_SVC # clear TIF_RESTART_SVC + ni __TI_flags+3(%r12),255-_TIF_RESTART_SVC # clear TIF_RESTART_SVC l %r7,SP_R2(%r15) # load new svc number mvc SP_R2(4,%r15),SP_ORIG_R2(%r15) # restore first argument lm %r2,%r6,SP_R2(%r15) # load svc arguments + sth %r7,SP_SVCNR(%r15) b BASED(sysc_nr_ok) # restart svc # # _TIF_SINGLE_STEP is set, call do_single_step # sysc_singlestep: - ni __TI_flags+3(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP - mvi SP_SVCNR(%r15),0xff # set trap indication to pgm check - mvi SP_SVCNR+1(%r15),0xff + ni __TI_flags+3(%r12),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 l %r1,BASED(.Lhandle_per) # load adr. of per handler la %r14,BASED(sysc_return) # load adr. of system return @@ -370,15 +371,15 @@ sysc_tracesys: l %r1,BASED(.Ltrace_entry) la %r2,SP_PTREGS(%r15) # load pt_regs la %r3,0 - srl %r7,2 - st %r7,SP_R2(%r15) + xr %r0,%r0 + icm %r0,3,SP_SVCNR(%r15) + st %r0,SP_R2(%r15) basr %r14,%r1 cl %r2,BASED(.Lnr_syscalls) bnl BASED(sysc_tracenogo) - l %r8,BASED(.Lsysc_table) lr %r7,%r2 sll %r7,2 # svc number *4 - l %r8,0(%r7,%r8) + l %r8,0(%r7,%r10) sysc_tracego: lm %r3,%r6,SP_R3(%r15) mvc SP_ARGS(4,%r15),SP_R7(%r15) @@ -386,7 +387,7 @@ sysc_tracego: basr %r14,%r8 # call sys_xxx st %r2,SP_R2(%r15) # store return value sysc_tracenogo: - tm __TI_flags+2(%r9),_TIF_SYSCALL + tm __TI_flags+2(%r12),_TIF_SYSCALL bz BASED(sysc_return) l %r1,BASED(.Ltrace_exit) la %r2,SP_PTREGS(%r15) # load pt_regs @@ -399,7 +400,7 @@ sysc_tracenogo: .globl ret_from_fork ret_from_fork: l %r13,__LC_SVC_NEW_PSW+4 - l %r9,__LC_THREAD_INFO # load pointer to thread_info struct + l %r12,__LC_THREAD_INFO # load pointer to thread_info struct tm SP_PSW+1(%r15),0x01 # forking a kernel thread ? bo BASED(0f) st %r15,SP_R15(%r15) # store stack pointer for new kthread @@ -434,8 +435,8 @@ kernel_execve: 0: stnsm __SF_EMPTY(%r15),0xfc # disable interrupts l %r15,__LC_KERNEL_STACK # load ksp s %r15,BASED(.Lc_spsize) # make room for registers & psw - l %r9,__LC_THREAD_INFO mvc SP_PTREGS(__PT_SIZE,%r15),0(%r12) # copy pt_regs + l %r12,__LC_THREAD_INFO xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) stosm __SF_EMPTY(%r15),0x03 # reenable interrupts l %r1,BASED(.Lexecve_tail) @@ -465,26 +466,27 @@ pgm_check_handler: SAVE_ALL_BASE __LC_SAVE_AREA tm __LC_PGM_INT_CODE+1,0x80 # check whether we got a per exception bnz BASED(pgm_per) # got per exception -> special case - SAVE_ALL_SYNC __LC_PGM_OLD_PSW,__LC_SAVE_AREA - CREATE_STACK_FRAME __LC_PGM_OLD_PSW,__LC_SAVE_AREA + SAVE_ALL_PGM __LC_PGM_OLD_PSW,__LC_SAVE_AREA + CREATE_STACK_FRAME __LC_SAVE_AREA + xc SP_ILC(4,%r15),SP_ILC(%r15) + mvc SP_PSW(8,%r15),__LC_PGM_OLD_PSW + l %r12,__LC_THREAD_INFO # load pointer to thread_info struct tm SP_PSW+1(%r15),0x01 # interrupting from user ? bz BASED(pgm_no_vtime) UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER pgm_no_vtime: - l %r9,__LC_THREAD_INFO # load pointer to thread_info struct l %r3,__LC_PGM_ILC # load program interruption code l %r4,__LC_TRANS_EXC_CODE REENABLE_IRQS la %r8,0x7f nr %r8,%r3 -pgm_do_call: - l %r7,BASED(.Ljump_table) sll %r8,2 - l %r7,0(%r8,%r7) # load address of handler routine + l %r1,BASED(.Ljump_table) + l %r1,0(%r8,%r1) # load address of handler routine la %r2,SP_PTREGS(%r15) # address of register-save area - basr %r14,%r7 # branch to interrupt-handler + basr %r14,%r1 # branch to interrupt-handler pgm_exit: b BASED(sysc_return) @@ -505,33 +507,34 @@ pgm_per: # Normal per exception # pgm_per_std: - SAVE_ALL_SYNC __LC_PGM_OLD_PSW,__LC_SAVE_AREA - CREATE_STACK_FRAME __LC_PGM_OLD_PSW,__LC_SAVE_AREA + SAVE_ALL_PGM __LC_PGM_OLD_PSW,__LC_SAVE_AREA + CREATE_STACK_FRAME __LC_SAVE_AREA + mvc SP_PSW(8,%r15),__LC_PGM_OLD_PSW + l %r12,__LC_THREAD_INFO # load pointer to thread_info struct tm SP_PSW+1(%r15),0x01 # interrupting from user ? bz BASED(pgm_no_vtime2) UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER pgm_no_vtime2: - l %r9,__LC_THREAD_INFO # load pointer to thread_info struct - l %r1,__TI_task(%r9) + l %r1,__TI_task(%r12) tm SP_PSW+1(%r15),0x01 # kernel per event ? bz BASED(kernel_per) mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID mvc __THREAD_per+__PER_address(4,%r1),__LC_PER_ADDRESS mvc __THREAD_per+__PER_access_id(1,%r1),__LC_PER_ACCESS_ID - oi __TI_flags+3(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP + oi __TI_flags+3(%r12),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP l %r3,__LC_PGM_ILC # load program interruption code l %r4,__LC_TRANS_EXC_CODE REENABLE_IRQS la %r8,0x7f nr %r8,%r3 # clear per-event-bit and ilc be BASED(pgm_exit2) # only per or per+check ? - l %r7,BASED(.Ljump_table) sll %r8,2 - l %r7,0(%r8,%r7) # load address of handler routine + l %r1,BASED(.Ljump_table) + l %r1,0(%r8,%r1) # load address of handler routine la %r2,SP_PTREGS(%r15) # address of register-save area - basr %r14,%r7 # branch to interrupt-handler + basr %r14,%r1 # branch to interrupt-handler pgm_exit2: b BASED(sysc_return) @@ -539,18 +542,19 @@ pgm_exit2: # it was a single stepped SVC that is causing all the trouble # pgm_svcper: - SAVE_ALL_SYNC __LC_SVC_OLD_PSW,__LC_SAVE_AREA - CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA + SAVE_ALL_PGM __LC_SVC_OLD_PSW,__LC_SAVE_AREA + CREATE_STACK_FRAME __LC_SAVE_AREA + mvc SP_PSW(8,%r15),__LC_SVC_OLD_PSW + mvc SP_ILC(4,%r15),__LC_SVC_ILC + l %r12,__LC_THREAD_INFO # load pointer to thread_info struct UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER - lh %r7,0x8a # get svc number from lowcore - l %r9,__LC_THREAD_INFO # load pointer to thread_info struct - l %r8,__TI_task(%r9) + l %r8,__TI_task(%r12) mvc __THREAD_per+__PER_atmid(2,%r8),__LC_PER_ATMID mvc __THREAD_per+__PER_address(4,%r8),__LC_PER_ADDRESS mvc __THREAD_per+__PER_access_id(1,%r8),__LC_PER_ACCESS_ID - oi __TI_flags+3(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP + oi __TI_flags+3(%r12),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP stosm __SF_EMPTY(%r15),0x03 # reenable interrupts lm %r2,%r6,SP_R2(%r15) # load svc arguments b BASED(sysc_do_svc) @@ -560,8 +564,7 @@ pgm_svcper: # kernel_per: REENABLE_IRQS - mvi SP_SVCNR(%r15),0xff # set trap indication to pgm check - mvi SP_SVCNR+1(%r15),0xff + xc SP_SVCNR(2,%r15),SP_SVCNR(%r15) la %r2,SP_PTREGS(%r15) # address of register-save area l %r1,BASED(.Lhandle_per) # load adr. of per handler basr %r14,%r1 # branch to do_single_step @@ -575,9 +578,10 @@ kernel_per: io_int_handler: stck __LC_INT_CLOCK stpt __LC_ASYNC_ENTER_TIMER - SAVE_ALL_BASE __LC_SAVE_AREA+16 SAVE_ALL_ASYNC __LC_IO_OLD_PSW,__LC_SAVE_AREA+16 - CREATE_STACK_FRAME __LC_IO_OLD_PSW,__LC_SAVE_AREA+16 + CREATE_STACK_FRAME __LC_SAVE_AREA+16 + mvc SP_PSW(8,%r15),0(%r12) # move user PSW to stack + l %r12,__LC_THREAD_INFO # load pointer to thread_info struct tm SP_PSW+1(%r15),0x01 # interrupting from user ? bz BASED(io_no_vtime) UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER @@ -585,7 +589,6 @@ io_int_handler: mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER io_no_vtime: TRACE_IRQS_OFF - l %r9,__LC_THREAD_INFO # load pointer to thread_info struct l %r1,BASED(.Ldo_IRQ) # load address of do_IRQ la %r2,SP_PTREGS(%r15) # address of register-save area basr %r14,%r1 # branch to standard irq handler @@ -593,7 +596,7 @@ io_return: LOCKDEP_SYS_EXIT TRACE_IRQS_ON io_tif: - tm __TI_flags+3(%r9),_TIF_WORK_INT + tm __TI_flags+3(%r12),_TIF_WORK_INT bnz BASED(io_work) # there is work to do (signals etc.) io_restore: RESTORE_ALL __LC_RETURN_PSW,0 @@ -611,9 +614,9 @@ io_work: bo BASED(io_work_user) # yes -> do resched & signal #ifdef CONFIG_PREEMPT # check for preemptive scheduling - icm %r0,15,__TI_precount(%r9) + icm %r0,15,__TI_precount(%r12) bnz BASED(io_restore) # preemption disabled - tm __TI_flags+3(%r9),_TIF_NEED_RESCHED + tm __TI_flags+3(%r12),_TIF_NEED_RESCHED bno BASED(io_restore) # switch to kernel stack l %r1,SP_R15(%r15) @@ -647,13 +650,13 @@ io_work_user: # and _TIF_MCCK_PENDING # io_work_tif: - tm __TI_flags+3(%r9),_TIF_MCCK_PENDING + tm __TI_flags+3(%r12),_TIF_MCCK_PENDING bo BASED(io_mcck_pending) - tm __TI_flags+3(%r9),_TIF_NEED_RESCHED + tm __TI_flags+3(%r12),_TIF_NEED_RESCHED bo BASED(io_reschedule) - tm __TI_flags+3(%r9),_TIF_SIGPENDING + tm __TI_flags+3(%r12),_TIF_SIGPENDING bo BASED(io_sigpending) - tm __TI_flags+3(%r9),_TIF_NOTIFY_RESUME + tm __TI_flags+3(%r12),_TIF_NOTIFY_RESUME bo BASED(io_notify_resume) b BASED(io_return) # beware of critical section cleanup @@ -713,16 +716,16 @@ io_notify_resume: ext_int_handler: stck __LC_INT_CLOCK stpt __LC_ASYNC_ENTER_TIMER - SAVE_ALL_BASE __LC_SAVE_AREA+16 SAVE_ALL_ASYNC __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16 - CREATE_STACK_FRAME __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16 + CREATE_STACK_FRAME __LC_SAVE_AREA+16 + mvc SP_PSW(8,%r15),0(%r12) # move user PSW to stack + l %r12,__LC_THREAD_INFO # load pointer to thread_info struct tm SP_PSW+1(%r15),0x01 # interrupting from user ? bz BASED(ext_no_vtime) UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER ext_no_vtime: - l %r9,__LC_THREAD_INFO # load pointer to thread_info struct TRACE_IRQS_OFF la %r2,SP_PTREGS(%r15) # address of register-save area l %r3,__LC_CPU_ADDRESS # get cpu address + interruption code @@ -777,7 +780,10 @@ mcck_int_main: sra %r14,PAGE_SHIFT be BASED(0f) l %r15,__LC_PANIC_STACK # load panic stack -0: CREATE_STACK_FRAME __LC_MCK_OLD_PSW,__LC_SAVE_AREA+32 +0: s %r15,BASED(.Lc_spsize) # make room for registers & psw + CREATE_STACK_FRAME __LC_SAVE_AREA+32 + mvc SP_PSW(8,%r15),0(%r12) + l %r12,__LC_THREAD_INFO # load pointer to thread_info struct tm __LC_MCCK_CODE+2,0x08 # mwp of old psw valid? bno BASED(mcck_no_vtime) # no -> skip cleanup critical tm SP_PSW+1(%r15),0x01 # interrupting from user ? @@ -786,7 +792,6 @@ mcck_int_main: UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER mvc __LC_LAST_UPDATE_TIMER(8),__LC_MCCK_ENTER_TIMER mcck_no_vtime: - l %r9,__LC_THREAD_INFO # load pointer to thread_info struct la %r2,SP_PTREGS(%r15) # load pt_regs l %r1,BASED(.Ls390_mcck) basr %r14,%r1 # call machine check handler @@ -798,7 +803,7 @@ mcck_no_vtime: xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1) # clear back chain lr %r15,%r1 stosm __SF_EMPTY(%r15),0x04 # turn dat on - tm __TI_flags+3(%r9),_TIF_MCCK_PENDING + tm __TI_flags+3(%r12),_TIF_MCCK_PENDING bno BASED(mcck_return) TRACE_IRQS_OFF l %r1,BASED(.Ls390_handle_mcck) @@ -947,12 +952,13 @@ cleanup_system_call: bh BASED(0f) mvc __LC_SAVE_AREA(16),0(%r12) 0: st %r13,4(%r12) - st %r12,__LC_SAVE_AREA+48 # argh - SAVE_ALL_SYNC __LC_SVC_OLD_PSW,__LC_SAVE_AREA - CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA - l %r12,__LC_SAVE_AREA+48 # argh + l %r15,__LC_KERNEL_STACK # problem state -> load ksp + s %r15,BASED(.Lc_spsize) # make room for registers & psw st %r15,12(%r12) - lh %r7,0x8a + CREATE_STACK_FRAME __LC_SAVE_AREA + mvc SP_PSW(8,%r15),__LC_SVC_OLD_PSW + mvc SP_ILC(4,%r15),__LC_SVC_ILC + mvc 0(4,%r12),__LC_THREAD_INFO cleanup_vtime: clc __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn+12) bhe BASED(cleanup_stime) |