diff options
Diffstat (limited to 'arch/s390/kernel')
| -rw-r--r-- | arch/s390/kernel/asm-offsets.c | 14 | ||||
| -rw-r--r-- | arch/s390/kernel/compat_ptrace.h | 53 | ||||
| -rw-r--r-- | arch/s390/kernel/entry.S | 274 | ||||
| -rw-r--r-- | arch/s390/kernel/entry.h | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/entry64.S | 73 | ||||
| -rw-r--r-- | arch/s390/kernel/ftrace.c | 238 | ||||
| -rw-r--r-- | arch/s390/kernel/irq.c | 41 | ||||
| -rw-r--r-- | arch/s390/kernel/kprobes.c | 470 | ||||
| -rw-r--r-- | arch/s390/kernel/mcount.S | 32 | ||||
| -rw-r--r-- | arch/s390/kernel/mcount64.S | 29 | ||||
| -rw-r--r-- | arch/s390/kernel/nmi.c | 3 | ||||
| -rw-r--r-- | arch/s390/kernel/process.c | 21 | ||||
| -rw-r--r-- | arch/s390/kernel/processor.c | 20 | ||||
| -rw-r--r-- | arch/s390/kernel/ptrace.c | 306 | ||||
| -rw-r--r-- | arch/s390/kernel/s390_ext.c | 125 | ||||
| -rw-r--r-- | arch/s390/kernel/signal.c | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/smp.c | 47 | ||||
| -rw-r--r-- | arch/s390/kernel/time.c | 6 | ||||
| -rw-r--r-- | arch/s390/kernel/traps.c | 15 | ||||
| -rw-r--r-- | arch/s390/kernel/vtime.c | 25 |
20 files changed, 906 insertions, 890 deletions
diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c index 33982e7ce04..fe03c140002 100644 --- a/arch/s390/kernel/asm-offsets.c +++ b/arch/s390/kernel/asm-offsets.c @@ -23,14 +23,16 @@ int main(void) { DEFINE(__THREAD_info, offsetof(struct task_struct, stack)); DEFINE(__THREAD_ksp, offsetof(struct task_struct, thread.ksp)); - DEFINE(__THREAD_per, offsetof(struct task_struct, thread.per_info)); DEFINE(__THREAD_mm_segment, offsetof(struct task_struct, thread.mm_segment)); BLANK(); DEFINE(__TASK_pid, offsetof(struct task_struct, pid)); BLANK(); - DEFINE(__PER_atmid, offsetof(per_struct, lowcore.words.perc_atmid)); - DEFINE(__PER_address, offsetof(per_struct, lowcore.words.address)); - DEFINE(__PER_access_id, offsetof(per_struct, lowcore.words.access_id)); + DEFINE(__THREAD_per_cause, + offsetof(struct task_struct, thread.per_event.cause)); + DEFINE(__THREAD_per_address, + offsetof(struct task_struct, thread.per_event.address)); + DEFINE(__THREAD_per_paid, + offsetof(struct task_struct, thread.per_event.paid)); BLANK(); DEFINE(__TI_task, offsetof(struct thread_info, task)); DEFINE(__TI_domain, offsetof(struct thread_info, exec_domain)); @@ -85,9 +87,9 @@ int main(void) DEFINE(__LC_PGM_ILC, offsetof(struct _lowcore, pgm_ilc)); DEFINE(__LC_PGM_INT_CODE, offsetof(struct _lowcore, pgm_code)); DEFINE(__LC_TRANS_EXC_CODE, offsetof(struct _lowcore, trans_exc_code)); - DEFINE(__LC_PER_ATMID, offsetof(struct _lowcore, per_perc_atmid)); + DEFINE(__LC_PER_CAUSE, offsetof(struct _lowcore, per_perc_atmid)); DEFINE(__LC_PER_ADDRESS, offsetof(struct _lowcore, per_address)); - DEFINE(__LC_PER_ACCESS_ID, offsetof(struct _lowcore, per_access_id)); + DEFINE(__LC_PER_PAID, offsetof(struct _lowcore, per_access_id)); DEFINE(__LC_AR_MODE_ID, offsetof(struct _lowcore, ar_access_id)); DEFINE(__LC_SUBCHANNEL_ID, offsetof(struct _lowcore, subchannel_id)); DEFINE(__LC_SUBCHANNEL_NR, offsetof(struct _lowcore, subchannel_nr)); diff --git a/arch/s390/kernel/compat_ptrace.h b/arch/s390/kernel/compat_ptrace.h index 3141025724f..12b82383351 100644 --- a/arch/s390/kernel/compat_ptrace.h +++ b/arch/s390/kernel/compat_ptrace.h @@ -4,40 +4,19 @@ #include <asm/ptrace.h> /* needed for NUM_CR_WORDS */ #include "compat_linux.h" /* needed for psw_compat_t */ -typedef struct { - __u32 cr[NUM_CR_WORDS]; -} per_cr_words32; - -typedef struct { - __u16 perc_atmid; /* 0x096 */ - __u32 address; /* 0x098 */ - __u8 access_id; /* 0x0a1 */ -} per_lowcore_words32; - -typedef struct { - union { - per_cr_words32 words; - } control_regs; - /* - * Use these flags instead of setting em_instruction_fetch - * directly they are used so that single stepping can be - * switched on & off while not affecting other tracing - */ - unsigned single_step : 1; - unsigned instruction_fetch : 1; - unsigned : 30; - /* - * These addresses are copied into cr10 & cr11 if single - * stepping is switched off - */ - __u32 starting_addr; - __u32 ending_addr; - union { - per_lowcore_words32 words; - } lowcore; -} per_struct32; +struct compat_per_struct_kernel { + __u32 cr9; /* PER control bits */ + __u32 cr10; /* PER starting address */ + __u32 cr11; /* PER ending address */ + __u32 bits; /* Obsolete software bits */ + __u32 starting_addr; /* User specified start address */ + __u32 ending_addr; /* User specified end address */ + __u16 perc_atmid; /* PER trap ATMID */ + __u32 address; /* PER trap instruction address */ + __u8 access_id; /* PER trap access identification */ +}; -struct user_regs_struct32 +struct compat_user_regs_struct { psw_compat_t psw; u32 gprs[NUM_GPRS]; @@ -50,14 +29,14 @@ struct user_regs_struct32 * itself as there is no "official" ptrace interface for hardware * watchpoints. This is the way intel does it. */ - per_struct32 per_info; + struct compat_per_struct_kernel per_info; u32 ieee_instruction_pointer; /* obsolete, always 0 */ }; -struct user32 { +struct compat_user { /* We start with the registers, to mimic the way that "memory" is returned from the ptrace(3,...) function. */ - struct user_regs_struct32 regs; /* Where the registers are actually stored */ + struct compat_user_regs_struct regs; /* The rest of this junk is to help gdb figure out what goes where */ u32 u_tsize; /* Text segment size (pages). */ u32 u_dsize; /* Data segment size (pages). */ @@ -79,6 +58,6 @@ typedef struct __u32 len; __u32 kernel_addr; __u32 process_addr; -} ptrace_area_emu31; +} compat_ptrace_area; #endif /* _PTRACE32_H */ diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index 1ecc337fb67..648f64239a9 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> @@ -49,7 +48,7 @@ SP_SVCNR = STACK_FRAME_OVERHEAD + __PT_SVCNR SP_SIZE = STACK_FRAME_OVERHEAD + __PT_SIZE _TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \ - _TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_SINGLE_STEP ) + _TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_PER_TRAP ) _TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \ _TIF_MCCK_PENDING) _TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \ @@ -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 @@ -188,6 +188,8 @@ STACK_SIZE = 1 << STACK_SHIFT ssm __SF_EMPTY(%r15) .endm + .section .kprobes.text, "ax" + /* * Scheduler resume function, called by switch_to * gpr2 = (task_struct *) prev @@ -198,31 +200,21 @@ STACK_SIZE = 1 << STACK_SHIFT .globl __switch_to __switch_to: basr %r1,0 -__switch_to_base: - tm __THREAD_per(%r3),0xe8 # new process is using per ? - bz __switch_to_noper-__switch_to_base(%r1) # if not we're fine - stctl %c9,%c11,__SF_EMPTY(%r15) # We are using per stuff - clc __THREAD_per(12,%r3),__SF_EMPTY(%r15) - be __switch_to_noper-__switch_to_base(%r1) # we got away w/o bashing TLB's - lctl %c9,%c11,__THREAD_per(%r3) # Nope we didn't -__switch_to_noper: - l %r4,__THREAD_info(%r2) # get thread_info of prev +0: l %r4,__THREAD_info(%r2) # get thread_info of prev + l %r5,__THREAD_info(%r3) # get thread_info of next tm __TI_flags+3(%r4),_TIF_MCCK_PENDING # machine check pending? - bz __switch_to_no_mcck-__switch_to_base(%r1) - ni __TI_flags+3(%r4),255-_TIF_MCCK_PENDING # clear flag in prev - l %r4,__THREAD_info(%r3) # get thread_info of next - oi __TI_flags+3(%r4),_TIF_MCCK_PENDING # set it in next -__switch_to_no_mcck: - stm %r6,%r15,__SF_GPRS(%r15)# store __switch_to registers of prev task - st %r15,__THREAD_ksp(%r2) # store kernel stack to prev->tss.ksp - l %r15,__THREAD_ksp(%r3) # load kernel stack from next->tss.ksp - lm %r6,%r15,__SF_GPRS(%r15)# load __switch_to registers of next task - st %r3,__LC_CURRENT # __LC_CURRENT = current task struct - lctl %c4,%c4,__TASK_pid(%r3) # load pid to control reg. 4 - l %r3,__THREAD_info(%r3) # load thread_info from task struct - st %r3,__LC_THREAD_INFO - ahi %r3,STACK_SIZE - st %r3,__LC_KERNEL_STACK # __LC_KERNEL_STACK = new kernel stack + bz 1f-0b(%r1) + ni __TI_flags+3(%r4),255-_TIF_MCCK_PENDING # clear flag in prev + oi __TI_flags+3(%r5),_TIF_MCCK_PENDING # set it in next +1: stm %r6,%r15,__SF_GPRS(%r15) # store gprs of prev task + st %r15,__THREAD_ksp(%r2) # store kernel stack of prev + l %r15,__THREAD_ksp(%r3) # load kernel stack of next + lctl %c4,%c4,__TASK_pid(%r3) # load pid to control reg. 4 + lm %r6,%r15,__SF_GPRS(%r15) # load gprs of next task + st %r3,__LC_CURRENT # store task struct of next + st %r5,__LC_THREAD_INFO # store thread info of next + ahi %r5,STACK_SIZE # end of kernel stack of next + st %r5,__LC_KERNEL_STACK # store end of kernel stack br %r14 __critical_start: @@ -235,10 +227,11 @@ __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: @@ -246,20 +239,20 @@ 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) @@ -267,7 +260,7 @@ 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 @@ -284,17 +277,17 @@ 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_PER_TRAP bo BASED(sysc_singlestep) b BASED(sysc_return) # beware of critical section cleanup @@ -318,13 +311,13 @@ 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_PER_TRAP # clear TIF_PER_TRAP 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_PER_TRAP bo BASED(sysc_singlestep) b BASED(sysc_return) @@ -342,23 +335,23 @@ 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 +# _TIF_PER_TRAP is set, call do_per_trap # 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_PER_TRAP # clear TIF_PER_TRAP + 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 - br %r1 # branch to do_single_step + br %r1 # branch to do_per_trap # # call tracehook_report_syscall_entry/tracehook_report_syscall_exit before @@ -368,15 +361,15 @@ 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) @@ -384,7 +377,7 @@ 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 @@ -397,7 +390,7 @@ 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 @@ -432,8 +425,8 @@ 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) @@ -463,26 +456,27 @@ 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) @@ -503,33 +497,34 @@ 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 + mvc __THREAD_per_cause(2,%r1),__LC_PER_CAUSE + mvc __THREAD_per_address(4,%r1),__LC_PER_ADDRESS + mvc __THREAD_per_paid(1,%r1),__LC_PER_PAID + oi __TI_flags+3(%r12),_TIF_PER_TRAP # set TIF_PER_TRAP 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) @@ -537,18 +532,19 @@ 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) - 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 + l %r8,__TI_task(%r12) + mvc __THREAD_per_cause(2,%r8),__LC_PER_CAUSE + mvc __THREAD_per_address(4,%r8),__LC_PER_ADDRESS + mvc __THREAD_per_paid(1,%r8),__LC_PER_PAID + oi __TI_flags+3(%r12),_TIF_PER_TRAP # set TIF_PER_TRAP stosm __SF_EMPTY(%r15),0x03 # reenable interrupts lm %r2,%r6,SP_R2(%r15) # load svc arguments b BASED(sysc_do_svc) @@ -558,8 +554,7 @@ 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 @@ -573,9 +568,10 @@ 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 @@ -583,7 +579,6 @@ 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 @@ -591,7 +586,7 @@ 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 @@ -609,9 +604,9 @@ 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) @@ -645,13 +640,13 @@ 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 @@ -711,16 +706,16 @@ 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 @@ -775,7 +770,10 @@ 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 ? @@ -784,7 +782,6 @@ 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 @@ -796,7 +793,7 @@ 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) @@ -861,6 +858,8 @@ restart_crash: restart_go: #endif + .section .kprobes.text, "ax" + #ifdef CONFIG_CHECK_STACK /* * The synchronous or the asynchronous stack overflowed. We are dead. @@ -943,12 +942,13 @@ 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) @@ -1046,7 +1046,7 @@ cleanup_io_restore_insn: .Ldo_signal: .long do_signal .Ldo_notify_resume: .long do_notify_resume -.Lhandle_per: .long do_single_step +.Lhandle_per: .long do_per_trap .Ldo_execve: .long do_execve .Lexecve_tail: .long execve_tail .Ljump_table: .long pgm_check_table diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h index 95c1dfc4ef3..17a6f83a2d6 100644 --- a/arch/s390/kernel/entry.h +++ b/arch/s390/kernel/entry.h @@ -12,7 +12,7 @@ pgm_check_handler_t do_dat_exception; extern int sysctl_userprocess_debug; -void do_single_step(struct pt_regs *regs); +void do_per_trap(struct pt_regs *regs); void syscall_trace(struct pt_regs *regs, int entryexit); void kernel_stack_overflow(struct pt_regs * regs); void do_signal(struct pt_regs *regs); diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S index 8f3e802174d..9d3603d6c51 100644 --- a/arch/s390/kernel/entry64.S +++ b/arch/s390/kernel/entry64.S @@ -51,7 +51,7 @@ STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER STACK_SIZE = 1 << STACK_SHIFT _TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \ - _TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_SINGLE_STEP ) + _TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_PER_TRAP ) _TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \ _TIF_MCCK_PENDING) _TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \ @@ -197,6 +197,8 @@ _TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \ ssm __SF_EMPTY(%r15) .endm + .section .kprobes.text, "ax" + /* * Scheduler resume function, called by switch_to * gpr2 = (task_struct *) prev @@ -206,30 +208,21 @@ _TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \ */ .globl __switch_to __switch_to: - tm __THREAD_per+4(%r3),0xe8 # is the new process using per ? - jz __switch_to_noper # if not we're fine - stctg %c9,%c11,__SF_EMPTY(%r15)# We are using per stuff - clc __THREAD_per(24,%r3),__SF_EMPTY(%r15) - je __switch_to_noper # we got away without bashing TLB's - lctlg %c9,%c11,__THREAD_per(%r3) # Nope we didn't -__switch_to_noper: - lg %r4,__THREAD_info(%r2) # get thread_info of prev + lg %r4,__THREAD_info(%r2) # get thread_info of prev + lg %r5,__THREAD_info(%r3) # get thread_info of next tm __TI_flags+7(%r4),_TIF_MCCK_PENDING # machine check pending? - jz __switch_to_no_mcck - ni __TI_flags+7(%r4),255-_TIF_MCCK_PENDING # clear flag in prev - lg %r4,__THREAD_info(%r3) # get thread_info of next - oi __TI_flags+7(%r4),_TIF_MCCK_PENDING # set it in next -__switch_to_no_mcck: - stmg %r6,%r15,__SF_GPRS(%r15)# store __switch_to registers of prev task - stg %r15,__THREAD_ksp(%r2) # store kernel stack to prev->tss.ksp - lg %r15,__THREAD_ksp(%r3) # load kernel stack from next->tss.ksp - lmg %r6,%r15,__SF_GPRS(%r15)# load __switch_to registers of next task - stg %r3,__LC_CURRENT # __LC_CURRENT = current task struct - lctl %c4,%c4,__TASK_pid(%r3) # load pid to control reg. 4 - lg %r3,__THREAD_info(%r3) # load thread_info from task struct - stg %r3,__LC_THREAD_INFO - aghi %r3,STACK_SIZE - stg %r3,__LC_KERNEL_STACK # __LC_KERNEL_STACK = new kernel stack + jz 0f + ni __TI_flags+7(%r4),255-_TIF_MCCK_PENDING # clear flag in prev + oi __TI_flags+7(%r5),_TIF_MCCK_PENDING # set it in next +0: stmg %r6,%r15,__SF_GPRS(%r15) # store gprs of prev task + stg %r15,__THREAD_ksp(%r2) # store kernel stack of prev + lg %r15,__THREAD_ksp(%r3) # load kernel stack of next + lctl %c4,%c4,__TASK_pid(%r3) # load pid to control reg. 4 + lmg %r6,%r15,__SF_GPRS(%r15) # load gprs of next task + stg %r3,__LC_CURRENT # store task struct of next + stg %r5,__LC_THREAD_INFO # store thread info of next + aghi %r5,STACK_SIZE # end of kernel stack of next + stg %r5,__LC_KERNEL_STACK # store end of kernel stack br %r14 __critical_start: @@ -309,7 +302,7 @@ sysc_work_tif: jo sysc_notify_resume tm __TI_flags+7(%r12),_TIF_RESTART_SVC jo sysc_restart - tm __TI_flags+7(%r12),_TIF_SINGLE_STEP + tm __TI_flags+7(%r12),_TIF_PER_TRAP jo sysc_singlestep j sysc_return # beware of critical section cleanup @@ -331,12 +324,12 @@ sysc_mcck_pending: # _TIF_SIGPENDING is set, call do_signal # sysc_sigpending: - ni __TI_flags+7(%r12),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP + ni __TI_flags+7(%r12),255-_TIF_PER_TRAP # clear TIF_PER_TRAP la %r2,SP_PTREGS(%r15) # load pt_regs brasl %r14,do_signal # call do_signal tm __TI_flags+7(%r12),_TIF_RESTART_SVC jo sysc_restart - tm __TI_flags+7(%r12),_TIF_SINGLE_STEP + tm __TI_flags+7(%r12),_TIF_PER_TRAP jo sysc_singlestep j sysc_return @@ -361,14 +354,14 @@ sysc_restart: j sysc_nr_ok # restart svc # -# _TIF_SINGLE_STEP is set, call do_single_step +# _TIF_PER_TRAP is set, call do_per_trap # sysc_singlestep: - ni __TI_flags+7(%r12),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP + ni __TI_flags+7(%r12),255-_TIF_PER_TRAP # clear TIF_PER_TRAP 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 + jg do_per_trap # # call tracehook_report_syscall_entry/tracehook_report_syscall_exit before @@ -524,10 +517,10 @@ pgm_no_vtime2: lg %r1,__TI_task(%r12) tm SP_PSW+1(%r15),0x01 # kernel per event ? jz kernel_per - mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID - mvc __THREAD_per+__PER_address(8,%r1),__LC_PER_ADDRESS - mvc __THREAD_per+__PER_access_id(1,%r1),__LC_PER_ACCESS_ID - oi __TI_flags+7(%r12),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP + mvc __THREAD_per_cause(2,%r1),__LC_PER_CAUSE + mvc __THREAD_per_address(8,%r1),__LC_PER_ADDRESS + mvc __THREAD_per_paid(1,%r1),__LC_PER_PAID + oi __TI_flags+7(%r12),_TIF_PER_TRAP # set TIF_PER_TRAP lgf %r3,__LC_PGM_ILC # load program interruption code lg %r4,__LC_TRANS_EXC_CODE REENABLE_IRQS @@ -556,10 +549,10 @@ pgm_svcper: mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER LAST_BREAK lg %r8,__TI |