diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/include/asm/kdebug.h | 2 | ||||
| -rw-r--r-- | arch/s390/include/asm/processor.h | 2 | ||||
| -rw-r--r-- | arch/s390/include/asm/ptrace.h | 3 | ||||
| -rw-r--r-- | arch/s390/include/asm/syscall.h | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/asm-offsets.c | 3 | ||||
| -rw-r--r-- | arch/s390/kernel/compat_signal.c | 8 | ||||
| -rw-r--r-- | arch/s390/kernel/entry.S | 22 | ||||
| -rw-r--r-- | arch/s390/kernel/entry.h | 10 | ||||
| -rw-r--r-- | arch/s390/kernel/entry64.S | 27 | ||||
| -rw-r--r-- | arch/s390/kernel/signal.c | 20 | ||||
| -rw-r--r-- | arch/s390/kernel/traps.c | 168 | ||||
| -rw-r--r-- | arch/s390/mm/fault.c | 101 |
12 files changed, 158 insertions, 210 deletions
diff --git a/arch/s390/include/asm/kdebug.h b/arch/s390/include/asm/kdebug.h index 40db27cd6e60..5c1abd47612a 100644 --- a/arch/s390/include/asm/kdebug.h +++ b/arch/s390/include/asm/kdebug.h @@ -22,6 +22,6 @@ enum die_val { DIE_NMI_IPI, }; -extern void die(const char *, struct pt_regs *, long); +extern void die(struct pt_regs *, const char *); #endif diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index 5f33d37d032c..27272f6a14c2 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -80,8 +80,6 @@ struct thread_struct { unsigned int acrs[NUM_ACRS]; unsigned long ksp; /* kernel stack pointer */ mm_segment_t mm_segment; - unsigned long prot_addr; /* address of protection-excep. */ - unsigned int trap_no; unsigned long gmap_addr; /* address of last gmap fault. */ struct per_regs per_user; /* User specified PER registers */ struct per_event per_event; /* Cause of the last PER trap */ diff --git a/arch/s390/include/asm/ptrace.h b/arch/s390/include/asm/ptrace.h index a65846340d51..56da355678f4 100644 --- a/arch/s390/include/asm/ptrace.h +++ b/arch/s390/include/asm/ptrace.h @@ -324,7 +324,8 @@ struct pt_regs psw_t psw; unsigned long gprs[NUM_GPRS]; unsigned long orig_gpr2; - unsigned int svc_code; + unsigned int int_code; + unsigned long int_parm_long; }; /* diff --git a/arch/s390/include/asm/syscall.h b/arch/s390/include/asm/syscall.h index b239ff53b189..fb214dd9b7e0 100644 --- a/arch/s390/include/asm/syscall.h +++ b/arch/s390/include/asm/syscall.h @@ -27,7 +27,7 @@ static inline long syscall_get_nr(struct task_struct *task, struct pt_regs *regs) { return test_tsk_thread_flag(task, TIF_SYSCALL) ? - (regs->svc_code & 0xffff) : -1; + (regs->int_code & 0xffff) : -1; } static inline void syscall_rollback(struct task_struct *task, diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c index c1a56ba5f848..6e6a72e66d60 100644 --- a/arch/s390/kernel/asm-offsets.c +++ b/arch/s390/kernel/asm-offsets.c @@ -45,7 +45,8 @@ int main(void) DEFINE(__PT_PSW, offsetof(struct pt_regs, psw)); DEFINE(__PT_GPRS, offsetof(struct pt_regs, gprs)); DEFINE(__PT_ORIG_GPR2, offsetof(struct pt_regs, orig_gpr2)); - DEFINE(__PT_SVC_CODE, offsetof(struct pt_regs, svc_code)); + DEFINE(__PT_INT_CODE, offsetof(struct pt_regs, int_code)); + DEFINE(__PT_INT_PARM_LONG, offsetof(struct pt_regs, int_parm_long)); DEFINE(__PT_SIZE, sizeof(struct pt_regs)); BLANK(); DEFINE(__SF_BACKCHAIN, offsetof(struct stack_frame, back_chain)); diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c index 4f68c81d3ffa..60c268b16f91 100644 --- a/arch/s390/kernel/compat_signal.c +++ b/arch/s390/kernel/compat_signal.c @@ -501,8 +501,12 @@ static int setup_frame32(int sig, struct k_sigaction *ka, /* We forgot to include these in the sigcontext. To avoid breaking binary compatibility, they are passed as args. */ - regs->gprs[4] = current->thread.trap_no; - regs->gprs[5] = current->thread.prot_addr; + if (sig == SIGSEGV || sig == SIGBUS || sig == SIGILL || + sig == SIGTRAP || sig == SIGFPE) { + /* set extra registers only for synchronous signals */ + regs->gprs[4] = regs->int_code & 127; + regs->gprs[5] = regs->int_parm_long; + } /* Place signal number on stack to allow backtrace from handler. */ if (__put_user(regs->gprs[2], (int __force __user *) &frame->signo)) diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index c2773cff89c3..3705700ed374 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -184,16 +184,16 @@ sysc_vtime: stm %r0,%r7,__PT_R0(%r11) mvc __PT_R8(32,%r11),__LC_SAVE_AREA_SYNC mvc __PT_PSW(8,%r11),__LC_SVC_OLD_PSW - mvc __PT_SVC_CODE(4,%r11),__LC_SVC_ILC + mvc __PT_INT_CODE(4,%r11),__LC_SVC_ILC sysc_do_svc: oi __TI_flags+3(%r12),_TIF_SYSCALL - lh %r8,__PT_SVC_CODE+2(%r11) + lh %r8,__PT_INT_CODE+2(%r11) sla %r8,2 # shift and test for svc0 jnz sysc_nr_ok # svc 0: system call number in %r1 cl %r1,BASED(.Lnr_syscalls) jnl sysc_nr_ok - sth %r1,__PT_SVC_CODE+2(%r11) + sth %r1,__PT_INT_CODE+2(%r11) lr %r8,%r1 sla %r8,2 sysc_nr_ok: @@ -266,9 +266,9 @@ sysc_sigpending: jno sysc_return lm %r2,%r7,__PT_R2(%r11) # load svc arguments xr %r8,%r8 # svc 0 returns -ENOSYS - clc __PT_SVC_CODE+2(2,%r11),BASED(.Lnr_syscalls+2) + clc __PT_INT_CODE+2(2,%r11),BASED(.Lnr_syscalls+2) jnl sysc_nr_ok # invalid svc number -> do svc 0 - lh %r8,__PT_SVC_CODE+2(%r11) # load new svc number + lh %r8,__PT_INT_CODE+2(%r11) # load new svc number sla %r8,2 j sysc_nr_ok # restart svc @@ -300,7 +300,7 @@ sysc_tracesys: lr %r2,%r11 # pass pointer to pt_regs la %r3,0 xr %r0,%r0 - icm %r0,3,__PT_SVC_CODE+2(%r11) + icm %r0,3,__PT_INT_CODE+2(%r11) st %r0,__PT_R2(%r11) basr %r14,%r1 # call do_syscall_trace_enter cl %r2,BASED(.Lnr_syscalls) @@ -396,6 +396,8 @@ ENTRY(pgm_check_handler) stm %r0,%r7,__PT_R0(%r11) mvc __PT_R8(32,%r11),__LC_SAVE_AREA_SYNC stm %r8,%r9,__PT_PSW(%r11) + mvc __PT_INT_CODE(4,%r11),__LC_PGM_ILC + mvc __PT_INT_PARM_LONG(4,%r11),__LC_TRANS_EXC_CODE tm __LC_PGM_ILC+3,0x80 # check for per exception jz 0f l %r1,__TI_task(%r12) @@ -405,13 +407,11 @@ ENTRY(pgm_check_handler) mvc __THREAD_per_address(4,%r1),__LC_PER_ADDRESS mvc __THREAD_per_cause(2,%r1),__LC_PER_CAUSE mvc __THREAD_per_paid(1,%r1),__LC_PER_PAID -0: l %r3,__LC_PGM_ILC # load program interruption code - l %r4,__LC_TRANS_EXC_CODE - REENABLE_IRQS +0: REENABLE_IRQS xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) l %r1,BASED(.Ljump_table) la %r10,0x7f - nr %r10,%r3 + n %r10,__PT_INT_CODE(%r11) je sysc_return sll %r10,2 l %r1,0(%r10,%r1) # load address of handler routine @@ -858,7 +858,7 @@ cleanup_system_call: mvc __PT_R8(32,%r15),__LC_SAVE_AREA_SYNC stm %r0,%r7,__PT_R0(%r15) mvc __PT_PSW(8,%r15),__LC_SVC_OLD_PSW - mvc __PT_SVC_CODE(4,%r15),__LC_SVC_ILC + mvc __PT_INT_CODE(4,%r15),__LC_SVC_ILC # setup saved register 15 ahi %r15,-STACK_FRAME_OVERHEAD st %r15,28(%r11) # r15 stack pointer diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h index ef8fb1d6e8d7..bf538aaf407d 100644 --- a/arch/s390/kernel/entry.h +++ b/arch/s390/kernel/entry.h @@ -6,15 +6,15 @@ #include <asm/ptrace.h> -extern void (*pgm_check_table[128])(struct pt_regs *, long, unsigned long); +extern void (*pgm_check_table[128])(struct pt_regs *); extern void *restart_stack; asmlinkage long do_syscall_trace_enter(struct pt_regs *regs); asmlinkage void do_syscall_trace_exit(struct pt_regs *regs); -void do_protection_exception(struct pt_regs *, long, unsigned long); -void do_dat_exception(struct pt_regs *, long, unsigned long); -void do_asce_exception(struct pt_regs *, long, unsigned long); +void do_protection_exception(struct pt_regs *regs); +void do_dat_exception(struct pt_regs *regs); +void do_asce_exception(struct pt_regs *regs); void do_per_trap(struct pt_regs *regs); void syscall_trace(struct pt_regs *regs, int entryexit); @@ -28,7 +28,7 @@ void do_extint(struct pt_regs *regs, unsigned int, unsigned int, unsigned long); void do_restart(void); int __cpuinit start_secondary(void *cpuvoid); void __init startup_init(void); -void die(const char * str, struct pt_regs * regs, long err); +void die(struct pt_regs *regs, const char *str); void __init time_init(void); diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S index 73845a9e587c..412a7b8783d7 100644 --- a/arch/s390/kernel/entry64.S +++ b/arch/s390/kernel/entry64.S @@ -1,4 +1,3 @@ - /* * arch/s390/kernel/entry64.S * S390 low-level entry points. @@ -200,17 +199,17 @@ sysc_vtime: stmg %r0,%r7,__PT_R0(%r11) mvc __PT_R8(64,%r11),__LC_SAVE_AREA_SYNC mvc __PT_PSW(16,%r11),__LC_SVC_OLD_PSW - mvc __PT_SVC_CODE(4,%r11),__LC_SVC_ILC + mvc __PT_INT_CODE(4,%r11),__LC_SVC_ILC sysc_do_svc: oi __TI_flags+7(%r12),_TIF_SYSCALL - llgh %r8,__PT_SVC_CODE+2(%r11) + llgh %r8,__PT_INT_CODE+2(%r11) slag %r8,%r8,2 # shift and test for svc 0 jnz sysc_nr_ok # svc 0: system call number in %r1 llgfr %r1,%r1 # clear high word in r1 cghi %r1,NR_syscalls jnl sysc_nr_ok - sth %r1,__PT_SVC_CODE+2(%r11) + sth %r1,__PT_INT_CODE+2(%r11) slag %r8,%r1,2 sysc_nr_ok: larl %r10,sys_call_table # 64 bit system call table @@ -288,7 +287,7 @@ sysc_sigpending: jno sysc_return lmg %r2,%r7,__PT_R2(%r11) # load svc arguments lghi %r8,0 # svc 0 returns -ENOSYS - lh %r1,__PT_SVC_CODE+2(%r11) # load new svc number + lh %r1,__PT_INT_CODE+2(%r11) # load new svc number cghi %r1,NR_syscalls jnl sysc_nr_ok # invalid svc number -> do svc 0 slag %r8,%r1,2 @@ -318,7 +317,7 @@ sysc_singlestep: sysc_tracesys: lgr %r2,%r11 # pass pointer to pt_regs la %r3,0 - llgh %r0,__PT_SVC_CODE+2(%r11) + llgh %r0,__PT_INT_CODE+2(%r11) stg %r0,__PT_R2(%r11) brasl %r14,do_syscall_trace_enter lghi %r0,NR_syscalls @@ -411,6 +410,8 @@ ENTRY(pgm_check_handler) stmg %r0,%r7,__PT_R0(%r11) mvc __PT_R8(64,%r11),__LC_SAVE_AREA_SYNC stmg %r8,%r9,__PT_PSW(%r11) + mvc __PT_INT_CODE(4,%r11),__LC_PGM_ILC + mvc __PT_INT_PARM_LONG(8,%r11),__LC_TRANS_EXC_CODE stg %r10,__PT_ARGS(%r11) tm __LC_PGM_ILC+3,0x80 # check for per exception jz 0f @@ -421,15 +422,13 @@ ENTRY(pgm_check_handler) mvc __THREAD_per_address(8,%r1),__LC_PER_ADDRESS mvc __THREAD_per_cause(2,%r1),__LC_PER_CAUSE mvc __THREAD_per_paid(1,%r1),__LC_PER_PAID -0: lgf %r3,__LC_PGM_ILC # load program interruption code - lg %r4,__LC_TRANS_EXC_CODE - REENABLE_IRQS +0: REENABLE_IRQS xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) - lghi %r10,0x7f - ngr %r10,%r3 - je sysc_return - sll %r10,3 larl %r1,pgm_check_table + llgh %r10,__PT_INT_CODE+2(%r11) + nill %r10,0x007f + sll %r10,3 + je sysc_return lg %r1,0(%r10,%r1) # load address of handler routine lgr %r2,%r11 # pass pointer to pt_regs basr %r14,%r1 # branch to interrupt-handler @@ -877,7 +876,7 @@ cleanup_system_call: mvc __PT_R8(64,%r15),__LC_SAVE_AREA_SYNC stmg %r0,%r7,__PT_R0(%r15) mvc __PT_PSW(16,%r15),__LC_SVC_OLD_PSW - mvc __PT_SVC_CODE(4,%r15),__LC_SVC_ILC + mvc __PT_INT_CODE(4,%r15),__LC_SVC_ILC # setup saved register r15 aghi %r15,-STACK_FRAME_OVERHEAD stg %r15,56(%r11) # r15 stack pointer diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c index 7f6f9f354545..a8ba840294ff 100644 --- a/arch/s390/kernel/signal.c +++ b/arch/s390/kernel/signal.c @@ -302,9 +302,13 @@ static int setup_frame(int sig, struct k_sigaction *ka, /* We forgot to include these in the sigcontext. To avoid breaking binary compatibility, they are passed as args. */ - regs->gprs[4] = current->thread.trap_no; - regs->gprs[5] = current->thread.prot_addr; - regs->gprs[6] = task_thread_info(current)->last_break; + if (sig == SIGSEGV || sig == SIGBUS || sig == SIGILL || + sig == SIGTRAP || sig == SIGFPE) { + /* set extra registers only for synchronous signals */ + regs->gprs[4] = regs->int_code & 127; + regs->gprs[5] = regs->int_parm_long; + regs->gprs[6] = task_thread_info(current)->last_break; + } /* Place signal number on stack to allow backtrace from handler. */ if (__put_user(regs->gprs[2], (int __user *) &frame->signo)) @@ -434,13 +438,13 @@ void do_signal(struct pt_regs *regs) * call information. */ current_thread_info()->system_call = - test_thread_flag(TIF_SYSCALL) ? regs->svc_code : 0; + test_thread_flag(TIF_SYSCALL) ? regs->int_code : 0; signr = get_signal_to_deliver(&info, &ka, regs, NULL); if (signr > 0) { /* Whee! Actually deliver the signal. */ if (current_thread_info()->system_call) { - regs->svc_code = current_thread_info()->system_call; + regs->int_code = current_thread_info()->system_call; /* Check for system call restarting. */ switch (regs->gprs[2]) { case -ERESTART_RESTARTBLOCK: @@ -457,7 +461,7 @@ void do_signal(struct pt_regs *regs) regs->gprs[2] = regs->orig_gpr2; regs->psw.addr = __rewind_psw(regs->psw, - regs->svc_code >> 16); + regs->int_code >> 16); break; } } @@ -488,11 +492,11 @@ void do_signal(struct pt_regs *regs) /* No handlers present - check for system call restart */ clear_thread_flag(TIF_SYSCALL); if (current_thread_info()->system_call) { - regs->svc_code = current_thread_info()->system_call; + regs->int_code = current_thread_info()->system_call; switch (regs->gprs[2]) { case -ERESTART_RESTARTBLOCK: /* Restart with sys_restart_syscall */ - regs->svc_code = __NR_restart_syscall; + regs->int_code = __NR_restart_syscall; /* fallthrough */ case -ERESTARTNOHAND: case -ERESTARTSYS: diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c index a9807dd86276..dc6cc1b0ae66 100644 --- a/arch/s390/kernel/traps.c +++ b/arch/s390/kernel/traps.c @@ -43,7 +43,7 @@ #include <asm/debug.h> #include "entry.h" -void (*pgm_check_table[128])(struct pt_regs *, long, unsigned long); +void (*pgm_check_table[128])(struct pt_regs *regs); int show_unhandled_signals; @@ -234,7 +234,7 @@ void show_regs(struct pt_regs *regs) static DEFINE_SPINLOCK(die_lock); -void die(const char * str, struct pt_regs * regs, long err) +void die(struct pt_regs *regs, const char *str) { static int die_counter; @@ -243,7 +243,7 @@ void die(const char * str, struct pt_regs * regs, long err) console_verbose(); spin_lock_irq(&die_lock); bust_spinlocks(1); - printk("%s: %04lx [#%d] ", str, err & 0xffff, ++die_counter); + printk("%s: %04x [#%d] ", str, regs->int_code & 0xffff, ++die_counter); #ifdef CONFIG_PREEMPT printk("PREEMPT "); #endif @@ -254,7 +254,7 @@ void die(const char * str, struct pt_regs * regs, long err) printk("DEBUG_PAGEALLOC"); #endif printk("\n"); - notify_die(DIE_OOPS, str, regs, err, current->thread.trap_no, SIGSEGV); + notify_die(DIE_OOPS, str, regs, 0, regs->int_code & 0xffff, SIGSEGV); show_regs(regs); bust_spinlocks(0); add_taint(TAINT_DIE); @@ -267,8 +267,7 @@ void die(const char * str, struct pt_regs * regs, long err) do_exit(SIGSEGV); } -static void inline report_user_fault(struct pt_regs *regs, long int_code, - int signr) +static inline void report_user_fault(struct pt_regs *regs, int signr) { if ((task_pid_nr(current) > 1) && !show_unhandled_signals) return; @@ -276,7 +275,7 @@ static void inline report_user_fault(struct pt_regs *regs, long int_code, return; if (!printk_ratelimit()) return; - printk("User process fault: interruption code 0x%lX ", int_code); + printk("User process fault: interruption code 0x%X ", regs->int_code); print_vma_addr("in ", regs->psw.addr & PSW_ADDR_INSN); printk("\n"); show_regs(regs); @@ -287,19 +286,28 @@ int is_valid_bugaddr(unsigned long addr) return 1; } -static inline void __kprobes do_trap(long pgm_int_code, int signr, char *str, - struct pt_regs *regs, siginfo_t *info) +static inline void __user *get_psw_address(struct pt_regs *regs) { - if (notify_die(DIE_TRAP, str, regs, pgm_int_code, - pgm_int_code, signr) == NOTIFY_STOP) + return (void __user *) + ((regs->psw.addr - (regs->int_code >> 16)) & PSW_ADDR_INSN); +} + +static void __kprobes do_trap(struct pt_regs *regs, + int si_signo, int si_code, char *str) +{ + siginfo_t info; + + if (notify_die(DIE_TRAP, str, regs, 0, + regs->int_code, si_signo) == NOTIFY_STOP) return; if (regs->psw.mask & PSW_MASK_PSTATE) { - struct task_struct *tsk = current; - - tsk->thread.trap_no = pgm_int_code & 0xffff; - force_sig_info(signr, info, tsk); - report_user_fault(regs, pgm_int_code, signr); + info.si_signo = si_signo; + info.si_errno = 0; + info.si_code = si_code; + info.si_addr = get_psw_address(regs); + force_sig_info(si_signo, &info, current); + report_user_fault(regs, si_signo); } else { const struct exception_table_entry *fixup; fixup = search_exception_tables(regs->psw.addr & PSW_ADDR_INSN); @@ -311,18 +319,11 @@ static inline void __kprobes do_trap(long pgm_int_code, int signr, char *str, btt = report_bug(regs->psw.addr & PSW_ADDR_INSN, regs); if (btt == BUG_TRAP_TYPE_WARN) return; - die(str, regs, pgm_int_code); + die(regs, str); } } } -static inline void __user *get_psw_address(struct pt_regs *regs, - long pgm_int_code) -{ - return (void __user *) - ((regs->psw.addr - (pgm_int_code >> 16)) & PSW_ADDR_INSN); -} - void __kprobes do_per_trap(struct pt_regs *regs) { siginfo_t info; @@ -339,26 +340,19 @@ void __kprobes do_per_trap(struct pt_regs *regs) force_sig_info(SIGTRAP, &info, current); } -static void default_trap_handler(struct pt_regs *regs, long pgm_int_code, - unsigned long trans_exc_code) +static void default_trap_handler(struct pt_regs *regs) { if (regs->psw.mask & PSW_MASK_PSTATE) { - report_user_fault(regs, pgm_int_code, SIGSEGV); + report_user_fault(regs, SIGSEGV); do_exit(SIGSEGV); } else - die("Unknown program exception", regs, pgm_int_code); + die(regs, "Unknown program exception"); } #define DO_ERROR_INFO(name, signr, sicode, str) \ -static void name(struct pt_regs *regs, long pgm_int_code, \ - unsigned long trans_exc_code) \ +static void name(struct pt_regs *regs) \ { \ - siginfo_t info; \ - info.si_signo = signr; \ - info.si_errno = 0; \ - info.si_code = sicode; \ - info.si_addr = get_psw_address(regs, pgm_int_code); \ - do_trap(pgm_int_code, signr, str, regs, &info); \ + do_trap(regs, signr, sicode, str); \ } DO_ERROR_INFO(addressing_exception, SIGILL, ILL_ILLADR, @@ -388,42 +382,34 @@ DO_ERROR_INFO(special_op_exception, SIGILL, ILL_ILLOPN, DO_ERROR_INFO(translation_exception, SIGILL, ILL_ILLOPN, "translation exception") -static inline void do_fp_trap(struct pt_regs *regs, void __user *location, - int fpc, long pgm_int_code) +static inline void do_fp_trap(struct pt_regs *regs, int fpc) { - siginfo_t si; - - si.si_signo = SIGFPE; - si.si_errno = 0; - si.si_addr = location; - si.si_code = 0; + int si_code = 0; /* FPC[2] is Data Exception Code */ if ((fpc & 0x00000300) == 0) { /* bits 6 and 7 of DXC are 0 iff IEEE exception */ if (fpc & 0x8000) /* invalid fp operation */ - si.si_code = FPE_FLTINV; + si_code = FPE_FLTINV; else if (fpc & 0x4000) /* div by 0 */ - si.si_code = FPE_FLTDIV; + si_code = FPE_FLTDIV; else if (fpc & 0x2000) /* overflow */ - si.si_code = FPE_FLTOVF; + si_code = FPE_FLTOVF; else if (fpc & 0x1000) /* underflow */ - si.si_code = FPE_FLTUND; + si_code = FPE_FLTUND; else if (fpc & 0x0800) /* inexact */ - si.si_code = FPE_FLTRES; + si_code = FPE_FLTRES; } - do_trap(pgm_int_code, SIGFPE, - "floating point exception", regs, &si); + do_trap(regs, SIGFPE, si_code, "floating point exception"); } -static void __kprobes illegal_op(struct pt_regs *regs, long pgm_int_code, - unsigned long trans_exc_code) +static void __kprobes illegal_op(struct pt_regs *regs) { siginfo_t info; __u8 opcode[6]; __u16 __user *location; int signal = 0; - location = get_psw_address(regs, pgm_int_code); + location = get_psw_address(regs); if (regs->psw.mask & PSW_MASK_PSTATE) { if (get_user(*((__u16 *) opcode), (__u16 __user *) location)) @@ -467,44 +453,31 @@ static void __kprobes illegal_op(struct pt_regs *regs, long pgm_int_code, * If we get an illegal op in kernel mode, send it through the * kprobes notifier. If kprobes doesn't pick it up, SIGILL */ - if (notify_die(DIE_BPT, "bpt", regs, pgm_int_code, + if (notify_die(DIE_BPT, "bpt", regs, 0, 3, SIGTRAP) != NOTIFY_STOP) signal = SIGILL; } #ifdef CONFIG_MATHEMU if (signal == SIGFPE) - do_fp_trap(regs, location, - current->thread.fp_regs.fpc, pgm_int_code); - else if (signal == SIGSEGV) { - info.si_signo = signal; - info.si_errno = 0; - info.si_code = SEGV_MAPERR; - info.si_addr = (void __user *) location; - do_trap(pgm_int_code, signal, - "user address fault", regs, &info); - } else + do_fp_trap(regs, current->thread.fp_regs.fpc); + else if (signal == SIGSEGV) + do_trap(regs, signal, SEGV_MAPERR, "user address fault"); + else #endif - if (signal) { - info.si_signo = signal; - info.si_errno = 0; - info.si_code = ILL_ILLOPC; - info.si_addr = (void __user *) location; - do_trap(pgm_int_code, signal, - "illegal operation", regs, &info); - } + if (signal) + do_trap(regs, signal, ILL_ILLOPC, "illegal operation"); } #ifdef CONFIG_MATHEMU -void specification_exception(struct pt_regs *regs, long pgm_int_code, - unsigned long trans_exc_code) +void specification_exception(struct pt_regs *regs) { __u8 opcode[6]; __u16 __user *location = NULL; int signal = 0; - location = (__u16 __user *) get_psw_address(regs, pgm_int_code); + location = (__u16 __user *) get_psw_address(regs); if (regs->psw.mask & PSW_MASK_PSTATE) { get_user(*((__u16 *) opcode), location); @@ -539,30 +512,21 @@ void specification_exception(struct pt_regs *regs, long pgm_int_code, signal = SIGILL; if (signal == SIGFPE) - do_fp_trap(regs, location, - current->thread.fp_regs.fpc, pgm_int_code); - else if (signal) { - siginfo_t info; - info.si_signo = signal; - info.si_errno = 0; - info.si_code = ILL_ILLOPN; - info.si_addr = location; - do_trap(pgm_int_code, signal, - "specification exception", regs, &info); - } + do_fp_trap(regs, current->thread.fp_regs.fpc); + else if (signal) + do_trap(regs, signal, ILL_ILLOPN, "specification exception"); } #else DO_ERROR_INFO(specification_exception, SIGILL, ILL_ILLOPN, "specification exception"); #endif -static void data_exception(struct pt_regs *regs, long pgm_int_code, - unsigned long trans_exc_code) +static void data_exception(struct pt_regs *regs) { __u16 __user *location; int signal = 0; - location = get_psw_address(regs, pgm_int_code); + location = get_psw_address(regs); if (MACHINE_HAS_IEEE) asm volatile("stfpc %0" : "=m" (current->thread.fp_regs.fpc)); @@ -627,32 +591,18 @@ static void data_exception(struct pt_regs *regs, long pgm_int_code, else signal = SIGILL; if (signal == SIGFPE) - do_fp_trap(regs, location, - current->thread.fp_regs.fpc, pgm_int_code); - else if (signal) { - siginfo_t info; - info.si_signo = signal; - info.si_errno = 0; - info.si_code = ILL_ILLOPN; - info.si_addr = location; - do_trap(pgm_int_code, signal, "data exception", regs, &info); - } + do_fp_trap(regs, current->thread.fp_regs.fpc); + else if (signal) + do_trap(regs, signal, ILL_ILLOPN, "data exception"); } -static void space_switch_exception(struct pt_regs *regs, long pgm_int_code, - unsigned long trans_exc_code) +static void space_switch_exception(struct pt_regs *regs) { - siginfo_t info; - /* Set user psw back to home space mode. */ if (regs->psw.mask & PSW_MASK_PSTATE) regs->psw.mask |= PSW_ASC_HOME; /* Send SIGILL. */ - info.si_signo = SIGILL; - info.si_errno = 0; - info.si_code = ILL_PRVOPC; - info.si_addr = get_psw_address(regs, pgm_int_code); - do_trap(pgm_int_code, SIGILL, "space switch event", regs, &info); + do_trap(regs, SIGILL, ILL_PRVOPC, "space switch event"); } void __kprobes kernel_stack_overflow(struct pt_regs * regs) diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index a9d3583922ec..354dd39073ef 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -125,8 +125,7 @@ static inline int user_space_fault(unsigned long trans_exc_code) return trans_exc_code != 3; } -static inline void report_user_fault(struct pt_regs *regs, long int_code, - int signr, unsigned long address) +static inline void report_user_fault(struct pt_regs *regs, long signr) { if ((task_pid_nr(current) > 1) && !show_unhandled_signals) return; @@ -134,10 +133,12 @@ static inline void report_user_fault(struct pt_regs *regs, long int_code, return; if (!printk_ratelimit()) return; - printk("User process fault: interruption code 0x%lX ", int_code); + printk(KERN_ALERT "User process fault: interruption code 0x%X ", + regs->int_code); print_vma_addr(KERN_CONT "in ", regs->psw.addr & PSW_ADDR_INSN); - printk("\n"); - printk("failing address: %lX\n", address); + printk(KERN_CONT "\n"); + printk(KERN_ALERT "failing address: %lX\n", + regs->int_parm_long & __FAIL_ADDR_MASK); show_regs(regs); } @@ -145,24 +146,18 @@ static inline void report_user_fault(struct pt_regs *regs, long int_code, * Send SIGSEGV to task. This is an external routine * to keep the stack usage of do_page_fault small. */ -static noinline void do_sigsegv(struct pt_regs *regs, long int_code, - int si_code, unsigned long trans_exc_code) +static noinline void do_sigsegv(struct pt_regs *regs, int si_code) { struct siginfo si; - unsigned long address; - address = trans_exc_code & __FAIL_ADDR_MASK; - current->thread.prot_addr = address; - current->thread.trap_no = int_code; - report_user_fault(regs, int_code, SIGSEGV, address); + report_user_fault(regs, SIGSEGV); si.si_signo = SIGSEGV; si.si_code = si_code; - si.si_addr = (void __user *) address; + si.si_addr = (void __user *)(regs->int_parm_long & __FAIL_ADDR_MASK); force_sig_info(SIGSEGV, &si, current); } -static noinline void do_no_context(struct pt_regs *regs, long int_code, - unsigned long trans_exc_code) +static noinline void do_no_context(struct pt_regs *regs) { const struct exception_table_entry *fixup; unsigned long address; @@ -178,55 +173,48 @@ static noinline void do_no_context(struct pt_regs *regs, long int_code, * Oops. The kernel tried to access some bad page. We'll have to * terminate things with extreme prejudice. */ - address = trans_exc_code & __FAIL_ADDR_MASK; - if (!user_space_fault(trans_exc_code)) + address = regs->int_parm_long & __FAIL_ADDR_MASK; + if (!user_space_fault(regs->int_parm_long)) printk(KERN_ALERT "Unable to handle kernel pointer dereference" " at virtual kernel address %p\n", (void *)address); else printk(KERN_ALERT "Unable to handle kernel paging request" " at virtual user address %p\n", (void *)address); - die("Oops", regs, int_code); + die(regs, "Oops"); do_exit(SIGKILL); } -static noinline void do_low_address(struct pt_regs *regs, long int_code, - unsigned long trans_exc_code) +static noinline void do_low_address(struct pt_regs *regs) { /* Low-address protection hit in kernel mode means NULL pointer write access in kernel mode. */ if (regs->psw.mask & PSW_MASK_PSTATE) { /* Low-address protection hit in user mode 'cannot happen'. */ - die ("Low-address protection", regs, int_code); + die (regs, "Low-address protection"); do_exit(SIGKILL); } - do_no_context(regs, int_code, trans_exc_code); + do_no_context(regs); } -static noinline void do_sigbus(struct pt_regs *regs, long int_code, - unsigned long trans_exc_code) +static noinline void do_sigbus(struct pt_regs *regs) { struct task_struct *tsk = current; - unsigned long address; struct siginfo si; /* * Send a sigbus, regardless of whether we were in kernel * or user mode. */ - address = trans_exc_code & __FAIL_ADDR_MASK; - tsk->thread.prot_addr = address; - tsk->thread.trap_no = int_code; si.si_signo = SIGBUS; si.si_errno = 0; si.si_code = BUS_ADRERR; - si.si_addr = (void __user *) address; + si.si_addr = (void __user *)(regs->int_parm_long & __FAIL_ADDR_MASK); force_sig_info(SIGBUS, &si, tsk); } -static noinline void do_fault_error(struct pt_regs *regs, long int_code, - unsigned long trans_exc_code, int fault) +static noinline void do_fault_error(struct pt_regs *regs, int fault) { int si_code; @@ -238,24 +226,24 @@ static noinline void do_fault_error(struct pt_regs *regs, long int_code, /* User mode accesses just cause a SIGSEGV */ si_code = (fault == VM_FAULT_BADMAP) ? SEGV_MAPERR : SEGV_ACCERR; - do_sigsegv(regs, int_code, si_code, trans_exc_code); + do_sigsegv(regs, si_code); return; } case VM_FAULT_BADCONTEXT: - do_no_context(regs, int_code, trans_exc_code); + do_no_context(regs); break; default: /* fault & VM_FAULT_ERROR */ if (fault & VM_FAULT_OOM) { if (!(regs->psw.mask & PSW_MASK_PSTATE)) - do_no_context(regs, int_code, trans_exc_code); + do_no_context(regs); else pagefault_out_of_memory(); } else if (fault & VM_FAULT_SIGBUS) { /* Kernel mode? Handle exceptions or die */ if (!(regs->psw.mask & PSW_MASK_PSTATE)) - do_no_context(regs, int_code, trans_exc_code); + do_no_context(regs); else - do_sigbus(regs, int_code, trans_exc_code); + do_sigbus(regs); } else BUG(); break; @@ -273,12 +261,12 @@ static noinline void do_fault_error(struct pt_regs *regs, long int_code, * 11 Page translation -> Not present (nullification) * 3b Region third trans. -> Not present (nullification) */ -static inline int do_exception(struct pt_regs *regs, int access, - unsigned long trans_exc_code) +static inline int do_exception(struct pt_regs *regs, int access) { struct task_struct *tsk; struct mm_struct *mm; struct vm_area_struct *vma; + unsigned long trans_exc_code; unsigned long address; unsigned int flags; int fault; @@ -288,6 +276,7 @@ static inline int do_exception(struct pt_regs *regs, int access, tsk = current; mm = tsk->mm; + trans_exc_code = regs->int_parm_long; /* * Verify that the fault happened in user space, that @@ -387,45 +376,46 @@ out: return fault; } -void __kprobes do_protection_exception(struct pt_regs *regs, long pgm_int_code, - unsigned long trans_exc_code) +void __kprobes do_protection_exception(struct pt_regs *regs) { + unsigned long trans_exc_code; int fault; + trans_exc_code = regs->int_parm_long; /* Protection exception is suppressing, decrement psw address. */ - regs->psw.addr = __rewind_psw(regs->psw, pgm_int_code >> 16); + regs->psw.addr = __rewind_psw(regs->psw, regs->int_code >> 16); /* * Check for low-address protection. This needs to be treated * as a special case because the translation exception code * field is not guaranteed to contain valid data in this case. */ if (unlikely(!(trans_exc_code & 4))) { - do_low_address(regs, pgm_int_code, trans_exc_code); + do_low_address(regs); return; } - fault = do_exception(regs, VM_WRITE, trans_exc_code); + fault = do_exception(regs, VM_WRITE); if (unlikely(fault)) - do_fault_error(regs, 4, trans_exc_code, fault); + do_fault_error(regs, fault); } -void __kprobes do_dat_exception(struct pt_regs *regs, long pgm_int_code, - unsigned long trans_exc_code) +void __kprobes do_dat_exception(struct pt_regs *regs) { int access, fault; access = VM_READ | VM_EXEC | VM_WRITE; - fault = do_exception(regs, access, trans_exc_code); + fault = do_exception(regs, access); if (unlikely(fault)) - do_fault_error(regs, pgm_int_code & 255, trans_exc_code, fault); + do_fault_error(regs, fault); } #ifdef CONFIG_64BIT -void __kprobes do_asce_exception(struct pt_regs *regs, long pgm_int_code, - unsigned long trans_exc_code) +void __kprobes do_asce_exception(struct pt_regs *regs) { struct mm_struct *mm = current->mm; struct vm_area_struct *vma; + unsigned long trans_exc_code; + trans_exc_code = regs->int_parm_long; if (unlikely(!user_space_fault(trans_exc_code) || in_atomic() || !mm)) goto no_context; @@ -440,12 +430,12 @@ void __kprobes do_asce_exception(struct pt_regs *regs, long pgm_int_code, /* User mode accesses just cause a SIGSEGV */ if (regs->psw.mask & PSW_MASK_PSTATE) { - do_sigsegv(regs, pgm_int_code, SEGV_MAPERR, trans_exc_code); + do_sigsegv(regs, SEGV_MAPERR); return; } no_context: - do_no_context(regs, pgm_int_code, trans_exc_code); + do_no_context(regs); } #endif @@ -459,14 +449,15 @@ int __handle_fault(unsigned long uaddr, unsigned long pgm_int_code, int write) regs.psw.mask |= PSW_MASK_IO | PSW_MASK_EXT; regs.psw.addr = (unsigned long) __builtin_return_address(0); regs.psw.addr |= PSW_ADDR_AMODE; - uaddr &= PAGE_MASK; + regs.int_code = pgm_int_code; + regs.int_parm_long = (uaddr & PAGE_MASK) | 2; access = write ? VM_WRITE : VM_READ; - fault = do_exception(®s, access, uaddr | 2); + fault = do_exception(®s, access); if (unlikely(fault)) { if (fault & VM_FAULT_OOM) return -EFAULT; else if (fault & VM_FAULT_SIGBUS) - do_sigbus(®s, pgm_int_code, uaddr); + do_sigbus(®s); } return fault ? -EFAULT : 0; } |