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author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-11 15:50:01 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-11 15:50:01 (GMT) |
commit | 37d9869ed928268409b48f52c57449918c0fd307 (patch) | |
tree | 7dd954260d723d1e0716b6432ba07b5c7be7f2ac /arch/s390/kernel | |
parent | 098ef215b1e87cff51f983bae4e4e1358b932ec9 (diff) | |
parent | 89d49841e9e7a90b04b036b7dbe7521b55edbe24 (diff) | |
download | linux-fsl-qoriq-37d9869ed928268409b48f52c57449918c0fd307.tar.xz |
Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6
* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: (27 commits)
[S390] Fix checkstack for s390
[S390] fix initialization of stp
[S390] 3215: Remove tasklet.
[S390] console flush on panic / reboot
[S390] introduce dirty bit for kvm live migration
[S390] Add ioctl support for EMC Symmetrix Subsystem Control I/O
[S390] xpram: per device block request queues.
[S390] dasd: fix message flood for unsolicited interrupts
[S390] Move private simple udelay function to arch/s390/lib/delay.c.
[S390] dcssblk: add >2G DCSSs support and stacked contiguous DCSSs support.
[S390] ptrace changes
[S390] s390: use sys_pause for 31bit pause entry point
[S390] qdio enhanced SIGA (iqdio) support.
[S390] cio: fix cio_tpi.
[S390] cio: Correct use of ! and &
[S390] cio: inline assembly cleanup
[S390] bus_id -> dev_set_name() for css and ccw busses
[S390] bus_id ->dev_name() conversions in qdio
[S390] Use s390_root_dev_* in kvm_virtio.
[S390] more bus_id -> dev_name conversions
...
Diffstat (limited to 'arch/s390/kernel')
-rw-r--r-- | arch/s390/kernel/compat_linux.c | 8 | ||||
-rw-r--r-- | arch/s390/kernel/compat_linux.h | 1 | ||||
-rw-r--r-- | arch/s390/kernel/compat_wrapper.S | 2 | ||||
-rw-r--r-- | arch/s390/kernel/entry.S | 50 | ||||
-rw-r--r-- | arch/s390/kernel/entry64.S | 42 | ||||
-rw-r--r-- | arch/s390/kernel/ptrace.c | 61 | ||||
-rw-r--r-- | arch/s390/kernel/signal.c | 13 | ||||
-rw-r--r-- | arch/s390/kernel/syscalls.S | 2 | ||||
-rw-r--r-- | arch/s390/kernel/time.c | 2 |
9 files changed, 120 insertions, 61 deletions
diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c index d7f2222..98e246d 100644 --- a/arch/s390/kernel/compat_linux.c +++ b/arch/s390/kernel/compat_linux.c @@ -608,14 +608,6 @@ asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv, struct time return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); } -/* These are here just in case some old sparc32 binary calls it. */ -asmlinkage long sys32_pause(void) -{ - current->state = TASK_INTERRUPTIBLE; - schedule(); - return -ERESTARTNOHAND; -} - asmlinkage long sys32_pread64(unsigned int fd, char __user *ubuf, size_t count, u32 poshi, u32 poslo) { diff --git a/arch/s390/kernel/compat_linux.h b/arch/s390/kernel/compat_linux.h index 20723a0..05f8516 100644 --- a/arch/s390/kernel/compat_linux.h +++ b/arch/s390/kernel/compat_linux.h @@ -206,7 +206,6 @@ long sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz); long sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz); -long sys32_pause(void); long sys32_pread64(unsigned int fd, char __user *ubuf, size_t count, u32 poshi, u32 poslo); long sys32_pwrite64(unsigned int fd, const char __user *ubuf, diff --git a/arch/s390/kernel/compat_wrapper.S b/arch/s390/kernel/compat_wrapper.S index 328a20e..ee51ca9 100644 --- a/arch/s390/kernel/compat_wrapper.S +++ b/arch/s390/kernel/compat_wrapper.S @@ -128,8 +128,6 @@ sys32_alarm_wrapper: llgfr %r2,%r2 # unsigned int jg sys_alarm # branch to system call -#sys32_pause_wrapper # void - .globl compat_sys_utime_wrapper compat_sys_utime_wrapper: llgtr %r2,%r2 # char * diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index 708cf9c..ed500ef 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -49,9 +49,9 @@ SP_ILC = STACK_FRAME_OVERHEAD + __PT_ILC SP_TRAP = STACK_FRAME_OVERHEAD + __PT_TRAP SP_SIZE = STACK_FRAME_OVERHEAD + __PT_SIZE -_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ +_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \ _TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_SINGLE_STEP ) -_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ +_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \ _TIF_MCCK_PENDING) STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER @@ -318,6 +318,8 @@ sysc_work: bo BASED(sysc_reschedule) tm __TI_flags+3(%r9),_TIF_SIGPENDING bnz BASED(sysc_sigpending) + tm __TI_flags+3(%r9),_TIF_NOTIFY_RESUME + bnz BASED(sysc_notify_resume) tm __TI_flags+3(%r9),_TIF_RESTART_SVC bo BASED(sysc_restart) tm __TI_flags+3(%r9),_TIF_SINGLE_STEP @@ -356,6 +358,16 @@ sysc_sigpending: b BASED(sysc_work_loop) # +# _TIF_NOTIFY_RESUME is set, call do_notify_resume +# +sysc_notify_resume: + la %r2,SP_PTREGS(%r15) # load pt_regs + l %r1,BASED(.Ldo_notify_resume) + la %r14,BASED(sysc_work_loop) + br %r1 # call do_notify_resume + + +# # _TIF_RESTART_SVC is set, set up registers and restart svc # sysc_restart: @@ -378,20 +390,21 @@ sysc_singlestep: br %r1 # branch to do_single_step # -# call trace before and after sys_call +# call tracehook_report_syscall_entry/tracehook_report_syscall_exit before +# and after the system call # sysc_tracesys: - l %r1,BASED(.Ltrace) + l %r1,BASED(.Ltrace_entry) la %r2,SP_PTREGS(%r15) # load pt_regs la %r3,0 srl %r7,2 st %r7,SP_R2(%r15) basr %r14,%r1 - clc SP_R2(4,%r15),BASED(.Lnr_syscalls) + cl %r2,BASED(.Lnr_syscalls) bnl BASED(sysc_tracenogo) l %r8,BASED(.Lsysc_table) - l %r7,SP_R2(%r15) # strace might have changed the - sll %r7,2 # system call + lr %r7,%r2 + sll %r7,2 # *4 l %r8,0(%r7,%r8) sysc_tracego: lm %r3,%r6,SP_R3(%r15) @@ -401,9 +414,8 @@ sysc_tracego: sysc_tracenogo: tm __TI_flags+3(%r9),(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT) bz BASED(sysc_return) - l %r1,BASED(.Ltrace) + l %r1,BASED(.Ltrace_exit) la %r2,SP_PTREGS(%r15) # load pt_regs - la %r3,1 la %r14,BASED(sysc_return) br %r1 @@ -666,6 +678,8 @@ io_work_loop: bo BASED(io_reschedule) tm __TI_flags+3(%r9),_TIF_SIGPENDING bnz BASED(io_sigpending) + tm __TI_flags+3(%r9),_TIF_NOTIFY_RESUME + bnz BASED(io_notify_resume) b BASED(io_restore) io_work_done: @@ -704,6 +718,19 @@ io_sigpending: TRACE_IRQS_OFF b BASED(io_work_loop) +# +# _TIF_SIGPENDING is set, call do_signal +# +io_notify_resume: + TRACE_IRQS_ON + stosm __SF_EMPTY(%r15),0x03 # reenable interrupts + la %r2,SP_PTREGS(%r15) # load pt_regs + l %r1,BASED(.Ldo_notify_resume) + basr %r14,%r1 # call do_signal + stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts + TRACE_IRQS_OFF + b BASED(io_work_loop) + /* * External interrupt handler routine */ @@ -1070,6 +1097,8 @@ cleanup_io_leave_insn: .Ldo_IRQ: .long do_IRQ .Ldo_extint: .long do_extint .Ldo_signal: .long do_signal +.Ldo_notify_resume: + .long do_notify_resume .Lhandle_per: .long do_single_step .Ldo_execve: .long do_execve .Lexecve_tail: .long execve_tail @@ -1079,7 +1108,8 @@ cleanup_io_leave_insn: .Lpreempt_schedule_irq: .long preempt_schedule_irq #endif -.Ltrace: .long syscall_trace +.Ltrace_entry: .long do_syscall_trace_enter +.Ltrace_exit: .long do_syscall_trace_exit .Lschedtail: .long schedule_tail .Lsysc_table: .long sys_call_table #ifdef CONFIG_TRACE_IRQFLAGS diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S index fee1017..d7ce150 100644 --- a/arch/s390/kernel/entry64.S +++ b/arch/s390/kernel/entry64.S @@ -52,9 +52,9 @@ SP_SIZE = STACK_FRAME_OVERHEAD + __PT_SIZE STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER STACK_SIZE = 1 << STACK_SHIFT -_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ +_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \ _TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_SINGLE_STEP ) -_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ +_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \ _TIF_MCCK_PENDING) #define BASED(name) name-system_call(%r13) @@ -310,6 +310,8 @@ sysc_work: jo sysc_reschedule tm __TI_flags+7(%r9),_TIF_SIGPENDING jnz sysc_sigpending + tm __TI_flags+7(%r9),_TIF_NOTIFY_RESUME + jnz sysc_notify_resume tm __TI_flags+7(%r9),_TIF_RESTART_SVC jo sysc_restart tm __TI_flags+7(%r9),_TIF_SINGLE_STEP @@ -345,6 +347,14 @@ sysc_sigpending: j sysc_work_loop # +# _TIF_NOTIFY_RESUME is set, call do_notify_resume +# +sysc_notify_resume: + la %r2,SP_PTREGS(%r15) # load pt_regs + larl %r14,sysc_work_loop + jg do_notify_resume # call do_notify_resume + +# # _TIF_RESTART_SVC is set, set up registers and restart svc # sysc_restart: @@ -367,20 +377,19 @@ sysc_singlestep: jg do_single_step # branch to do_sigtrap # -# call syscall_trace before and after system call -# special linkage: %r12 contains the return address for trace_svc +# call tracehook_report_syscall_entry/tracehook_report_syscall_exit before +# and after the system call # sysc_tracesys: la %r2,SP_PTREGS(%r15) # load pt_regs la %r3,0 srl %r7,2 stg %r7,SP_R2(%r15) - brasl %r14,syscall_trace + brasl %r14,do_syscall_trace_enter lghi %r0,NR_syscalls - clg %r0,SP_R2(%r15) + clgr %r0,%r2 jnh sysc_tracenogo - lg %r7,SP_R2(%r15) # strace might have changed the - sll %r7,2 # system call + slag %r7,%r2,2 # *4 lgf %r8,0(%r7,%r10) sysc_tracego: lmg %r3,%r6,SP_R3(%r15) @@ -391,9 +400,8 @@ sysc_tracenogo: tm __TI_flags+7(%r9),(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT) jz sysc_return la %r2,SP_PTREGS(%r15) # load pt_regs - la %r3,1 larl %r14,sysc_return # return point is sysc_return - jg syscall_trace + jg do_syscall_trace_exit # # a new process exits the kernel with ret_from_fork @@ -672,6 +680,8 @@ io_work_loop: jo io_reschedule tm __TI_flags+7(%r9),_TIF_SIGPENDING jnz io_sigpending + tm __TI_flags+7(%r9),_TIF_NOTIFY_RESUME + jnz io_notify_resume j io_restore io_work_done: @@ -712,6 +722,18 @@ io_sigpending: TRACE_IRQS_OFF j io_work_loop +# +# _TIF_NOTIFY_RESUME or is set, call do_notify_resume +# +io_notify_resume: + TRACE_IRQS_ON + stosm __SF_EMPTY(%r15),0x03 # reenable interrupts + la %r2,SP_PTREGS(%r15) # load pt_regs + brasl %r14,do_notify_resume # call do_notify_resume + stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts + TRACE_IRQS_OFF + j io_work_loop + /* * External interrupt handler routine */ diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c index c8b0828..1f31be1 100644 --- a/arch/s390/kernel/ptrace.c +++ b/arch/s390/kernel/ptrace.c @@ -35,6 +35,7 @@ #include <linux/signal.h> #include <linux/elf.h> #include <linux/regset.h> +#include <linux/tracehook.h> #include <asm/segment.h> #include <asm/page.h> @@ -639,40 +640,44 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request, } #endif -asmlinkage void -syscall_trace(struct pt_regs *regs, int entryexit) +asmlinkage long do_syscall_trace_enter(struct pt_regs *regs) { - if (unlikely(current->audit_context) && entryexit) - audit_syscall_exit(AUDITSC_RESULT(regs->gprs[2]), regs->gprs[2]); - - if (!test_thread_flag(TIF_SYSCALL_TRACE)) - goto out; - if (!(current->ptrace & PT_PTRACED)) - goto out; - ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) - ? 0x80 : 0)); + long ret; /* - * If the debuffer has set an invalid system call number, - * we prepare to skip the system call restart handling. + * The sysc_tracesys code in entry.S stored the system + * call number to gprs[2]. */ - if (!entryexit && regs->gprs[2] >= NR_syscalls) + ret = regs->gprs[2]; + if (test_thread_flag(TIF_SYSCALL_TRACE) && + (tracehook_report_syscall_entry(regs) || + regs->gprs[2] >= NR_syscalls)) { + /* + * Tracing decided this syscall should not happen or the + * debugger stored an invalid system call number. Skip + * the system call and the system call restart handling. + */ regs->trap = -1; - - /* - * this isn't the same as continuing with a signal, but it will do - * for normal use. strace only continues with a signal if the - * stopping signal is not SIGTRAP. -brl - */ - if (current->exit_code) { - send_sig(current->exit_code, current, 1); - current->exit_code = 0; + ret = -1; } - out: - if (unlikely(current->audit_context) && !entryexit) - audit_syscall_entry(test_thread_flag(TIF_31BIT)?AUDIT_ARCH_S390:AUDIT_ARCH_S390X, - regs->gprs[2], regs->orig_gpr2, regs->gprs[3], - regs->gprs[4], regs->gprs[5]); + + if (unlikely(current->audit_context)) + audit_syscall_entry(test_thread_flag(TIF_31BIT) ? + AUDIT_ARCH_S390 : AUDIT_ARCH_S390X, + regs->gprs[2], regs->orig_gpr2, + regs->gprs[3], regs->gprs[4], + regs->gprs[5]); + return ret; +} + +asmlinkage void do_syscall_trace_exit(struct pt_regs *regs) +{ + if (unlikely(current->audit_context)) + audit_syscall_exit(AUDITSC_RESULT(regs->gprs[2]), + regs->gprs[2]); + + if (test_thread_flag(TIF_SYSCALL_TRACE)) + tracehook_report_syscall_exit(regs, 0); } /* diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c index b976820..4f7fc30 100644 --- a/arch/s390/kernel/signal.c +++ b/arch/s390/kernel/signal.c @@ -24,6 +24,7 @@ #include <linux/tty.h> #include <linux/personality.h> #include <linux/binfmts.h> +#include <linux/tracehook.h> #include <asm/ucontext.h> #include <asm/uaccess.h> #include <asm/lowcore.h> @@ -507,6 +508,12 @@ void do_signal(struct pt_regs *regs) */ if (current->thread.per_info.single_step) set_thread_flag(TIF_SINGLE_STEP); + + /* + * Let tracing know that we've done the handler setup. + */ + tracehook_signal_handler(signr, &info, &ka, regs, + test_thread_flag(TIF_SINGLE_STEP)); } return; } @@ -526,3 +533,9 @@ void do_signal(struct pt_regs *regs) set_thread_flag(TIF_RESTART_SVC); } } + +void do_notify_resume(struct pt_regs *regs) +{ + clear_thread_flag(TIF_NOTIFY_RESUME); + tracehook_notify_resume(regs); +} diff --git a/arch/s390/kernel/syscalls.S b/arch/s390/kernel/syscalls.S index c66d35e..3ae3039 100644 --- a/arch/s390/kernel/syscalls.S +++ b/arch/s390/kernel/syscalls.S @@ -37,7 +37,7 @@ SYSCALL(sys_stime,sys_ni_syscall,sys32_stime_wrapper) /* 25 old stime syscall * SYSCALL(sys_ptrace,sys_ptrace,sys32_ptrace_wrapper) SYSCALL(sys_alarm,sys_alarm,sys32_alarm_wrapper) NI_SYSCALL /* old fstat syscall */ -SYSCALL(sys_pause,sys_pause,sys32_pause) +SYSCALL(sys_pause,sys_pause,sys_pause) SYSCALL(sys_utime,sys_utime,compat_sys_utime_wrapper) /* 30 */ NI_SYSCALL /* old stty syscall */ NI_SYSCALL /* old gtty syscall */ diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c index 06acb1a..b94e9e3 100644 --- a/arch/s390/kernel/time.c +++ b/arch/s390/kernel/time.c @@ -1356,7 +1356,7 @@ static void __init stp_reset(void) stp_page = alloc_bootmem_pages(PAGE_SIZE); rc = chsc_sstpc(stp_page, STP_OP_CTRL, 0x0000); - if (rc == 1) + if (rc == 0) set_bit(CLOCK_SYNC_HAS_STP, &clock_sync_flags); else if (stp_online) { printk(KERN_WARNING "Running on non STP capable machine.\n"); |