[PATCH] s390: Add support for new syscalls/TIF_RESTORE_SIGMASK
authorHeiko Carstens <heiko.carstens@de.ibm.com>
Wed, 1 Feb 2006 11:06:38 +0000 (03:06 -0800)
committerLinus Torvalds <torvalds@g5.osdl.org>
Wed, 1 Feb 2006 16:53:24 +0000 (08:53 -0800)
Add support for the new *at, pselect6 and ppoll system calls.  This includes
adding required support for TIF_RESTORE_SIGMASK.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
arch/s390/kernel/compat_signal.c
arch/s390/kernel/compat_wrapper.S
arch/s390/kernel/entry.S
arch/s390/kernel/entry64.S
arch/s390/kernel/signal.c
arch/s390/kernel/syscalls.S
include/asm-s390/thread_info.h
include/asm-s390/unistd.h

index fa2b3bc22f206983bf9b1d19ba13a8df635ec3f1..ef706694a0c1d3897ab28330576901214d8d3a62 100644 (file)
@@ -1,8 +1,7 @@
 /*
- *  arch/s390/kernel/signal32.c
+ *  arch/s390/kernel/compat_signal.c
  *
- *  S390 version
- *    Copyright (C) 2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Copyright (C) IBM Corp. 2000,2006
  *    Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
  *               Gerhard Tonn (ton@de.ibm.com)                  
  *
@@ -52,8 +51,6 @@ typedef struct
        struct ucontext32 uc;
 } rt_sigframe32;
 
-asmlinkage int FASTCALL(do_signal(struct pt_regs *regs, sigset_t *oldset));
-
 int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
 {
        int err;
@@ -161,66 +158,6 @@ int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
        return err;
 }
 
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-asmlinkage int
-sys32_sigsuspend(struct pt_regs * regs,int history0, int history1, old_sigset_t mask)
-{
-       sigset_t saveset;
-
-       mask &= _BLOCKABLE;
-       spin_lock_irq(&current->sighand->siglock);
-       saveset = current->blocked;
-       siginitset(&current->blocked, mask);
-       recalc_sigpending();
-       spin_unlock_irq(&current->sighand->siglock);
-       regs->gprs[2] = -EINTR;
-
-       while (1) {
-               set_current_state(TASK_INTERRUPTIBLE);
-               schedule();
-               if (do_signal(regs, &saveset))
-                       return -EINTR;
-       }
-}
-
-asmlinkage int
-sys32_rt_sigsuspend(struct pt_regs * regs, compat_sigset_t __user *unewset,
-                                                               size_t sigsetsize)
-{
-       sigset_t saveset, newset;
-       compat_sigset_t set32;
-
-       /* XXX: Don't preclude handling different sized sigset_t's.  */
-       if (sigsetsize != sizeof(sigset_t))
-               return -EINVAL;
-
-       if (copy_from_user(&set32, unewset, sizeof(set32)))
-               return -EFAULT;
-       switch (_NSIG_WORDS) {
-       case 4: newset.sig[3] = set32.sig[6] + (((long)set32.sig[7]) << 32);
-       case 3: newset.sig[2] = set32.sig[4] + (((long)set32.sig[5]) << 32);
-       case 2: newset.sig[1] = set32.sig[2] + (((long)set32.sig[3]) << 32);
-       case 1: newset.sig[0] = set32.sig[0] + (((long)set32.sig[1]) << 32);
-       }
-        sigdelsetmask(&newset, ~_BLOCKABLE);
-
-        spin_lock_irq(&current->sighand->siglock);
-        saveset = current->blocked;
-        current->blocked = newset;
-        recalc_sigpending();
-        spin_unlock_irq(&current->sighand->siglock);
-        regs->gprs[2] = -EINTR;
-
-        while (1) {
-                set_current_state(TASK_INTERRUPTIBLE);
-                schedule();
-                if (do_signal(regs, &saveset))
-                        return -EINTR;
-        }
-}
-
 asmlinkage long
 sys32_sigaction(int sig, const struct old_sigaction32 __user *act,
                 struct old_sigaction32 __user *oact)
@@ -520,7 +457,7 @@ static inline int map_signal(int sig)
                return sig;
 }
 
-static void setup_frame32(int sig, struct k_sigaction *ka,
+static int setup_frame32(int sig, struct k_sigaction *ka,
                        sigset_t *set, struct pt_regs * regs)
 {
        sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(sigframe32));
@@ -565,13 +502,14 @@ static void setup_frame32(int sig, struct k_sigaction *ka,
        /* Place signal number on stack to allow backtrace from handler.  */
        if (__put_user(regs->gprs[2], (int __user *) &frame->signo))
                goto give_sigsegv;
-       return;
+       return 0;
 
 give_sigsegv:
        force_sigsegv(sig, current);
+       return -EFAULT;
 }
 
-static void setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info,
+static int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info,
                           sigset_t *set, struct pt_regs * regs)
 {
        int err = 0;
@@ -615,31 +553,37 @@ static void setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info,
        regs->gprs[2] = map_signal(sig);
        regs->gprs[3] = (__u64) &frame->info;
        regs->gprs[4] = (__u64) &frame->uc;
-       return;
+       return 0;
 
 give_sigsegv:
        force_sigsegv(sig, current);
+       return -EFAULT;
 }
 
 /*
  * OK, we're invoking a handler
  */    
 
-void
+int
 handle_signal32(unsigned long sig, struct k_sigaction *ka,
                siginfo_t *info, sigset_t *oldset, struct pt_regs * regs)
 {
+       int ret;
+
        /* Set up the stack frame */
        if (ka->sa.sa_flags & SA_SIGINFO)
-               setup_rt_frame32(sig, ka, info, oldset, regs);
+               ret = setup_rt_frame32(sig, ka, info, oldset, regs);
        else
-               setup_frame32(sig, ka, oldset, regs);
-
-       spin_lock_irq(&current->sighand->siglock);
-       sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
-       if (!(ka->sa.sa_flags & SA_NODEFER))
-               sigaddset(&current->blocked,sig);
-       recalc_sigpending();
-       spin_unlock_irq(&current->sighand->siglock);
+               ret = setup_frame32(sig, ka, oldset, regs);
+
+       if (ret == 0) {
+               spin_lock_irq(&current->sighand->siglock);
+               sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
+               if (!(ka->sa.sa_flags & SA_NODEFER))
+                       sigaddset(&current->blocked,sig);
+               recalc_sigpending();
+               spin_unlock_irq(&current->sighand->siglock);
+       }
+       return ret;
 }
 
index cfde1905d07d77c5d2513e14a3c019e1d56f01d6..6e27ac68ec3f01060093a7fb98b3ff0899f7f0ca 100644 (file)
@@ -1,9 +1,8 @@
 /*
-*  arch/s390/kernel/sys_wrapper31.S
+*  arch/s390/kernel/compat_wrapper.S
 *    wrapper for 31 bit compatible system calls.
 *
-*  S390 version
-*    Copyright (C) 2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
+*    Copyright (C) IBM Corp. 2000,2006
 *    Author(s): Gerhard Tonn (ton@de.ibm.com),
 *               Thomas Spatzier (tspat@de.ibm.com)
 */ 
@@ -288,7 +287,12 @@ sys32_setregid16_wrapper:
        llgfr   %r3,%r3                 # __kernel_old_gid_emu31_t 
        jg      sys32_setregid16        # branch to system call
 
-#sys32_sigsuspend_wrapper              # done in sigsuspend_glue 
+       .globl sys_sigsuspend_wrapper
+sys_sigsuspend_wrapper:
+       lgfr    %r2,%r2                 # int
+       lgfr    %r3,%r3                 # int
+       llgfr   %r4,%r4                 # old_sigset_t
+       jg      sys_sigsuspend
 
        .globl  compat_sys_sigpending_wrapper 
 compat_sys_sigpending_wrapper:
@@ -855,7 +859,11 @@ sys32_rt_sigqueueinfo_wrapper:
        llgtr   %r4,%r4                 # siginfo_emu31_t *
        jg      sys32_rt_sigqueueinfo   # branch to system call
 
-#sys32_rt_sigsuspend_wrapper           # done in rt_sigsuspend_glue 
+       .globl compat_sys_rt_sigsuspend_wrapper
+compat_sys_rt_sigsuspend_wrapper:
+       llgtr   %r2,%r2                 # compat_sigset_t *
+       llgfr   %r3,%r3                 # compat_size_t
+       jg      compat_sys_rt_sigsuspend
 
        .globl  sys32_pread64_wrapper 
 sys32_pread64_wrapper:
@@ -1475,3 +1483,122 @@ sys_inotify_rm_watch_wrapper:
        lgfr    %r2,%r2                 # int
        llgfr   %r3,%r3                 # u32
        jg      sys_inotify_rm_watch
+
+       .globl compat_sys_openat_wrapper
+compat_sys_openat_wrapper:
+       lgfr    %r2,%r2                 # int
+       llgtr   %r3,%r3                 # const char *
+       lgfr    %r4,%r4                 # int
+       lgfr    %r5,%r5                 # int
+       jg      compat_sys_openat
+
+       .globl sys_mkdirat_wrapper
+sys_mkdirat_wrapper:
+       lgfr    %r2,%r2                 # int
+       llgtr   %r3,%r3                 # const char *
+       lgfr    %r4,%r4                 # int
+       jg      sys_mkdirat
+
+       .globl sys_mknodat_wrapper
+sys_mknodat_wrapper:
+       lgfr    %r2,%r2                 # int
+       llgtr   %r3,%r3                 # const char *
+       lgfr    %r4,%r4                 # int
+       llgfr   %r5,%r5                 # unsigned int
+       jg      sys_mknodat
+
+       .globl sys_fchownat_wrapper
+sys_fchownat_wrapper:
+       lgfr    %r2,%r2                 # int
+       llgtr   %r3,%r3                 # const char *
+       llgfr   %r4,%r4                 # uid_t
+       llgfr   %r5,%r5                 # gid_t
+       lgfr    %r6,%r6                 # int
+       jg      sys_fchownat
+
+       .globl compat_sys_futimesat_wrapper
+compat_sys_futimesat_wrapper:
+       lgfr    %r2,%r2                 # int
+       llgtr   %r3,%r3                 # char *
+       llgtr   %r4,%r4                 # struct timeval *
+       jg      compat_sys_futimesat
+
+       .globl compat_sys_newfstatat_wrapper
+compat_sys_newfstatat_wrapper:
+       lgfr    %r2,%r2                 # int
+       llgtr   %r3,%r3                 # char *
+       llgtr   %r4,%r4                 # struct stat *
+       lgfr    %r5,%r5                 # int
+       jg      compat_sys_newfstatat
+
+       .globl sys_unlinkat_wrapper
+sys_unlinkat_wrapper:
+       lgfr    %r2,%r2                 # int
+       llgtr   %r3,%r3                 # const char *
+       lgfr    %r4,%r4                 # int
+       jg      sys_unlinkat
+
+       .globl sys_renameat_wrapper
+sys_renameat_wrapper:
+       lgfr    %r2,%r2                 # int
+       llgtr   %r3,%r3                 # const char *
+       lgfr    %r4,%r4                 # int
+       llgtr   %r5,%r5                 # const char *
+       jg      sys_renameat
+
+       .globl sys_linkat_wrapper
+sys_linkat_wrapper:
+       lgfr    %r2,%r2                 # int
+       llgtr   %r3,%r3                 # const char *
+       lgfr    %r4,%r4                 # int
+       llgtr   %r5,%r5                 # const char *
+       jg      sys_linkat
+
+       .globl sys_symlinkat_wrapper
+sys_symlinkat_wrapper:
+       llgtr   %r2,%r2                 # const char *
+       lgfr    %r3,%r3                 # int
+       llgtr   %r4,%r4                 # const char *
+       jg      sys_symlinkat
+
+       .globl sys_readlinkat_wrapper
+sys_readlinkat_wrapper:
+       lgfr    %r2,%r2                 # int
+       llgtr   %r3,%r3                 # const char *
+       llgtr   %r4,%r4                 # char *
+       lgfr    %r5,%r5                 # int
+       jg      sys_readlinkat
+
+       .globl sys_fchmodat_wrapper
+sys_fchmodat_wrapper:
+       lgfr    %r2,%r2                 # int
+       llgtr   %r3,%r3                 # const char *
+       llgfr   %r4,%r4                 # mode_t
+       jg      sys_fchmodat
+
+       .globl sys_faccessat_wrapper
+sys_faccessat_wrapper:
+       lgfr    %r2,%r2                 # int
+       llgtr   %r3,%r3                 # const char *
+       lgfr    %r4,%r4                 # int
+       jg      sys_faccessat
+
+       .globl compat_sys_pselect6_wrapper
+compat_sys_pselect6_wrapper:
+       lgfr    %r2,%r2                 # int
+       llgtr   %r3,%r3                 # fd_set *
+       llgtr   %r4,%r4                 # fd_set *
+       llgtr   %r5,%r5                 # fd_set *
+       llgtr   %r6,%r6                 # struct timespec *
+       llgt    %r0,164(%r15)           # void *
+       stg     %r0,160(%r15)
+       jg      compat_sys_pselect6
+
+       .globl compat_sys_ppoll_wrapper
+compat_sys_ppoll_wrapper:
+       llgtr   %r2,%r2                 # struct pollfd *
+       llgfr   %r3,%r3                 # unsigned int
+       llgtr   %r4,%r4                 # struct timespec *
+       llgtr   %r5,%r5                 # const sigset_t *
+       llgfr   %r6,%r6                 # size_t
+       jg      compat_sys_ppoll
index 27b07730b7b8d172f4330aaea690f53e82152628..b2448487854cfbd5a36aae778be1eebec9184211 100644 (file)
@@ -2,8 +2,7 @@
  *  arch/s390/kernel/entry.S
  *    S390 low-level entry points.
  *
- *  S390 version
- *    Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Copyright (C) IBM Corp. 1999,2006
  *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
  *               Hartmut Penner (hp@de.ibm.com),
  *               Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com),
@@ -50,9 +49,10 @@ 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_MCCK_PENDING | \
-                _TIF_RESTART_SVC | _TIF_SINGLE_STEP )
-_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_MCCK_PENDING)
+_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK | _TIF_NEED_RESCHED | \
+                _TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_SINGLE_STEP )
+_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK | _TIF_NEED_RESCHED | \
+                _TIF_MCCK_PENDING)
 
 STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER
 STACK_SIZE  = 1 << STACK_SHIFT
@@ -251,8 +251,8 @@ sysc_work:
        bo      BASED(sysc_mcck_pending)
        tm      __TI_flags+3(%r9),_TIF_NEED_RESCHED
        bo      BASED(sysc_reschedule)
-       tm      __TI_flags+3(%r9),_TIF_SIGPENDING
-       b     BASED(sysc_sigpending)
+       tm      __TI_flags+3(%r9),(_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK)
+       bnz     BASED(sysc_sigpending)
        tm      __TI_flags+3(%r9),_TIF_RESTART_SVC
        bo      BASED(sysc_restart)
        tm      __TI_flags+3(%r9),_TIF_SINGLE_STEP
@@ -276,12 +276,11 @@ sysc_mcck_pending:
        br      %r1                     # TIF bit will be cleared by handler
 
 #
-# _TIF_SIGPENDING is set, call do_signal
+# _TIF_SIGPENDING or _TIF_RESTORE_SIGMASK is set, call do_signal
 #
 sysc_sigpending:     
        ni      __TI_flags+3(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
         la      %r2,SP_PTREGS(%r15)    # load pt_regs
-        sr      %r3,%r3                # clear *oldset
         l       %r1,BASED(.Ldo_signal)
        basr    %r14,%r1               # call do_signal
        tm      __TI_flags+3(%r9),_TIF_RESTART_SVC
@@ -397,30 +396,6 @@ sys_rt_sigreturn_glue:
         l       %r1,BASED(.Lrt_sigreturn)
         br      %r1                   # branch to sys_sigreturn
 
-#
-# sigsuspend and rt_sigsuspend need pt_regs as an additional
-# parameter and they have to skip the store of %r2 into the
-# user register %r2 because the return value was set in 
-# sigsuspend and rt_sigsuspend already and must not be overwritten!
-#
-
-sys_sigsuspend_glue:    
-        lr      %r5,%r4               # move mask back
-        lr      %r4,%r3               # move history1 parameter
-        lr      %r3,%r2               # move history0 parameter
-        la      %r2,SP_PTREGS(%r15)   # load pt_regs as first parameter
-        l       %r1,BASED(.Lsigsuspend)
-       la      %r14,4(%r14)          # skip store of return value
-        br      %r1                   # branch to sys_sigsuspend
-
-sys_rt_sigsuspend_glue: 
-        lr      %r4,%r3               # move sigsetsize parameter
-        lr      %r3,%r2               # move unewset parameter
-        la      %r2,SP_PTREGS(%r15)   # load pt_regs as first parameter
-        l       %r1,BASED(.Lrt_sigsuspend)
-       la      %r14,4(%r14)          # skip store of return value
-        br      %r1                   # branch to sys_rt_sigsuspend
-
 sys_sigaltstack_glue:
         la      %r4,SP_PTREGS(%r15)   # load pt_regs as parameter
         l       %r1,BASED(.Lsigaltstack)
@@ -604,15 +579,16 @@ io_work:
        lr      %r15,%r1
 #
 # One of the work bits is on. Find out which one.
-# Checked are: _TIF_SIGPENDING, _TIF_NEED_RESCHED and _TIF_MCCK_PENDING
+# Checked are: _TIF_SIGPENDING, _TIF_RESTORE_SIGMASK, _TIF_NEED_RESCHED
+#              and _TIF_MCCK_PENDING
 #
 io_work_loop:
        tm      __TI_flags+3(%r9),_TIF_MCCK_PENDING
        bo      BASED(io_mcck_pending)
        tm      __TI_flags+3(%r9),_TIF_NEED_RESCHED
        bo      BASED(io_reschedule)
-       tm      __TI_flags+3(%r9),_TIF_SIGPENDING
-       b     BASED(io_sigpending)
+       tm      __TI_flags+3(%r9),(_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK)
+       bnz     BASED(io_sigpending)
        b       BASED(io_leave)
 
 #
@@ -636,12 +612,11 @@ io_reschedule:
        b       BASED(io_work_loop)
 
 #
-# _TIF_SIGPENDING is set, call do_signal
+# _TIF_SIGPENDING or _TIF_RESTORE_SIGMASK is set, call do_signal
 #
 io_sigpending:     
         stosm   __SF_EMPTY(%r15),0x03  # reenable interrupts
         la      %r2,SP_PTREGS(%r15)    # load pt_regs
-        sr      %r3,%r3                # clear *oldset
         l       %r1,BASED(.Ldo_signal)
        basr    %r14,%r1               # call do_signal
         stnsm   __SF_EMPTY(%r15),0xfc  # disable I/O and ext. interrupts
index 369ab4413ec71fe0123d16a2a2d187c2eb6603a9..2ac095bc0e250373588ba658916d0bdc700577fc 100644 (file)
@@ -1,9 +1,8 @@
 /*
- *  arch/s390/kernel/entry.S
+ *  arch/s390/kernel/entry64.S
  *    S390 low-level entry points.
  *
- *  S390 version
- *    Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Copyright (C) IBM Corp. 1999,2006
  *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
  *               Hartmut Penner (hp@de.ibm.com),
  *               Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com),
@@ -53,9 +52,10 @@ 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_MCCK_PENDING | \
-                _TIF_RESTART_SVC | _TIF_SINGLE_STEP )
-_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_MCCK_PENDING)
+_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK | _TIF_NEED_RESCHED | \
+                _TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_SINGLE_STEP )
+_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK | _TIF_NEED_RESCHED | \
+                _TIF_MCCK_PENDING)
 
 #define BASED(name) name-system_call(%r13)
 
@@ -249,8 +249,8 @@ sysc_work:
        jo      sysc_mcck_pending
        tm      __TI_flags+7(%r9),_TIF_NEED_RESCHED
        jo      sysc_reschedule
-       tm      __TI_flags+7(%r9),_TIF_SIGPENDING
-       j     sysc_sigpending
+       tm      __TI_flags+7(%r9),(_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK)
+       jnz     sysc_sigpending
        tm      __TI_flags+7(%r9),_TIF_RESTART_SVC
        jo      sysc_restart
        tm      __TI_flags+7(%r9),_TIF_SINGLE_STEP
@@ -272,12 +272,11 @@ sysc_mcck_pending:
        jg      s390_handle_mcck    # TIF bit will be cleared by handler
 
 #
-# _TIF_SIGPENDING is set, call do_signal
+# _TIF_SIGPENDING or _TIF_RESTORE_SIGMASK is set, call do_signal
 #
 sysc_sigpending:     
        ni      __TI_flags+7(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
         la      %r2,SP_PTREGS(%r15) # load pt_regs
-        sgr     %r3,%r3           # clear *oldset
        brasl   %r14,do_signal    # call do_signal
        tm      __TI_flags+7(%r9),_TIF_RESTART_SVC
        jo      sysc_restart
@@ -414,52 +413,6 @@ sys32_rt_sigreturn_glue:
         jg      sys32_rt_sigreturn    # branch to sys32_sigreturn
 #endif
 
-#
-# sigsuspend and rt_sigsuspend need pt_regs as an additional
-# parameter and they have to skip the store of %r2 into the
-# user register %r2 because the return value was set in 
-# sigsuspend and rt_sigsuspend already and must not be overwritten!
-#
-
-sys_sigsuspend_glue:    
-        lgr     %r5,%r4               # move mask back
-        lgr     %r4,%r3               # move history1 parameter
-        lgr     %r3,%r2               # move history0 parameter
-        la      %r2,SP_PTREGS(%r15)   # load pt_regs as first parameter
-       la      %r14,6(%r14)          # skip store of return value
-        jg      sys_sigsuspend        # branch to sys_sigsuspend
-
-#ifdef CONFIG_COMPAT
-sys32_sigsuspend_glue:    
-       llgfr   %r4,%r4               # unsigned long                   
-        lgr     %r5,%r4               # move mask back
-       lgfr    %r3,%r3               # int                     
-        lgr     %r4,%r3               # move history1 parameter
-       lgfr    %r2,%r2               # int                     
-        lgr     %r3,%r2               # move history0 parameter
-        la      %r2,SP_PTREGS(%r15)   # load pt_regs as first parameter
-       la      %r14,6(%r14)          # skip store of return value
-        jg      sys32_sigsuspend      # branch to sys32_sigsuspend
-#endif
-
-sys_rt_sigsuspend_glue: 
-        lgr     %r4,%r3               # move sigsetsize parameter
-        lgr     %r3,%r2               # move unewset parameter
-        la      %r2,SP_PTREGS(%r15)   # load pt_regs as first parameter
-       la      %r14,6(%r14)          # skip store of return value
-        jg      sys_rt_sigsuspend     # branch to sys_rt_sigsuspend
-
-#ifdef CONFIG_COMPAT
-sys32_rt_sigsuspend_glue: 
-       llgfr   %r3,%r3               # size_t                  
-        lgr     %r4,%r3               # move sigsetsize parameter
-       llgtr   %r2,%r2               # sigset_emu31_t *
-        lgr     %r3,%r2               # move unewset parameter
-        la      %r2,SP_PTREGS(%r15)   # load pt_regs as first parameter
-       la      %r14,6(%r14)          # skip store of return value
-        jg      sys32_rt_sigsuspend   # branch to sys32_rt_sigsuspend
-#endif
-
 sys_sigaltstack_glue:
         la      %r4,SP_PTREGS(%r15)   # load pt_regs as parameter
         jg      sys_sigaltstack       # branch to sys_sigreturn
@@ -646,15 +599,16 @@ io_work:
        lgr     %r15,%r1
 #
 # One of the work bits is on. Find out which one.
-# Checked are: _TIF_SIGPENDING, _TIF_NEED_RESCHED and _TIF_MCCK_PENDING
+# Checked are: _TIF_SIGPENDING, _TIF_RESTORE_SIGPENDING, _TIF_NEED_RESCHED
+#             and _TIF_MCCK_PENDING
 #
 io_work_loop:
        tm      __TI_flags+7(%r9),_TIF_MCCK_PENDING
        jo      io_mcck_pending
        tm      __TI_flags+7(%r9),_TIF_NEED_RESCHED
        jo      io_reschedule
-       tm      __TI_flags+7(%r9),_TIF_SIGPENDING
-       j     io_sigpending
+       tm      __TI_flags+7(%r9),(_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK)
+       jnz     io_sigpending
        j       io_leave
 
 #
@@ -676,12 +630,11 @@ io_reschedule:
        j       io_work_loop
 
 #
-# _TIF_SIGPENDING is set, call do_signal
+# _TIF_SIGPENDING or _TIF_RESTORE_SIGMASK is set, call do_signal
 #
 io_sigpending:     
        stosm   __SF_EMPTY(%r15),0x03   # reenable interrupts
        la      %r2,SP_PTREGS(%r15)     # load pt_regs
-       slgr    %r3,%r3                 # clear *oldset
        brasl   %r14,do_signal          # call do_signal
        stnsm   __SF_EMPTY(%r15),0xfc   # disable I/O and ext. interrupts
        j       io_work_loop
index 6ae4a77270b539023fd94dd00ead6d9decbb3778..ae1927e48cfb8fbef2fe082885245d3ed9c17e2a 100644 (file)
@@ -1,8 +1,7 @@
 /*
  *  arch/s390/kernel/signal.c
  *
- *  S390 version
- *    Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Copyright (C) IBM Corp. 1999,2006
  *    Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
  *
  *    Based on Intel version
@@ -51,60 +50,24 @@ typedef struct
        struct ucontext uc;
 } rt_sigframe;
 
-int do_signal(struct pt_regs *regs, sigset_t *oldset);
-
 /*
  * Atomically swap in the new signal mask, and wait for a signal.
  */
 asmlinkage int
-sys_sigsuspend(struct pt_regs * regs, int history0, int history1,
-              old_sigset_t mask)
+sys_sigsuspend(int history0, int history1, old_sigset_t mask)
 {
-       sigset_t saveset;
-
        mask &= _BLOCKABLE;
        spin_lock_irq(&current->sighand->siglock);
-       saveset = current->blocked;
+       current->saved_sigmask = current->blocked;
        siginitset(&current->blocked, mask);
        recalc_sigpending();
        spin_unlock_irq(&current->sighand->siglock);
-       regs->gprs[2] = -EINTR;
-
-       while (1) {
-               set_current_state(TASK_INTERRUPTIBLE);
-               schedule();
-               if (do_signal(regs, &saveset))
-                       return -EINTR;
-       }
-}
-
-asmlinkage long
-sys_rt_sigsuspend(struct pt_regs *regs, sigset_t __user *unewset,
-                                               size_t sigsetsize)
-{
-       sigset_t saveset, newset;
 
-       /* XXX: Don't preclude handling different sized sigset_t's.  */
-       if (sigsetsize != sizeof(sigset_t))
-               return -EINVAL;
+       current->state = TASK_INTERRUPTIBLE;
+       schedule();
+       set_thread_flag(TIF_RESTORE_SIGMASK);
 
-       if (copy_from_user(&newset, unewset, sizeof(newset)))
-               return -EFAULT;
-       sigdelsetmask(&newset, ~_BLOCKABLE);
-
-       spin_lock_irq(&current->sighand->siglock);
-       saveset = current->blocked;
-       current->blocked = newset;
-       recalc_sigpending();
-       spin_unlock_irq(&current->sighand->siglock);
-       regs->gprs[2] = -EINTR;
-
-       while (1) {
-               set_current_state(TASK_INTERRUPTIBLE);
-               schedule();
-               if (do_signal(regs, &saveset))
-                       return -EINTR;
-       }
+       return -ERESTARTNOHAND;
 }
 
 asmlinkage long
@@ -306,8 +269,8 @@ static inline int map_signal(int sig)
                return sig;
 }
 
-static void setup_frame(int sig, struct k_sigaction *ka,
-                       sigset_t *set, struct pt_regs * regs)
+static int setup_frame(int sig, struct k_sigaction *ka,
+                      sigset_t *set, struct pt_regs * regs)
 {
        sigframe __user *frame;
 
@@ -355,13 +318,14 @@ static void setup_frame(int sig, struct k_sigaction *ka,
        /* Place signal number on stack to allow backtrace from handler.  */
        if (__put_user(regs->gprs[2], (int __user *) &frame->signo))
                goto give_sigsegv;
-       return;
+       return 0;
 
 give_sigsegv:
        force_sigsegv(sig, current);
+       return -EFAULT;
 }
 
-static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
+static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
                           sigset_t *set, struct pt_regs * regs)
 {
        int err = 0;
@@ -409,32 +373,39 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
        regs->gprs[2] = map_signal(sig);
        regs->gprs[3] = (unsigned long) &frame->info;
        regs->gprs[4] = (unsigned long) &frame->uc;
-       return;
+       return 0;
 
 give_sigsegv:
        force_sigsegv(sig, current);
+       return -EFAULT;
 }
 
 /*
  * OK, we're invoking a handler
  */    
 
-static void
+static int
 handle_signal(unsigned long sig, struct k_sigaction *ka,
              siginfo_t *info, sigset_t *oldset, struct pt_regs * regs)
 {
+       int ret;
+
        /* Set up the stack frame */
        if (ka->sa.sa_flags & SA_SIGINFO)
-               setup_rt_frame(sig, ka, info, oldset, regs);
+               ret = setup_rt_frame(sig, ka, info, oldset, regs);
        else
-               setup_frame(sig, ka, oldset, regs);
+               ret = setup_frame(sig, ka, oldset, regs);
+
+       if (ret == 0) {
+               spin_lock_irq(&current->sighand->siglock);
+               sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
+               if (!(ka->sa.sa_flags & SA_NODEFER))
+                       sigaddset(&current->blocked,sig);
+               recalc_sigpending();
+               spin_unlock_irq(&current->sighand->siglock);
+       }
 
-       spin_lock_irq(&current->sighand->siglock);
-       sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
-       if (!(ka->sa.sa_flags & SA_NODEFER))
-               sigaddset(&current->blocked,sig);
-       recalc_sigpending();
-       spin_unlock_irq(&current->sighand->siglock);
+       return ret;
 }
 
 /*
@@ -446,12 +417,13 @@ handle_signal(unsigned long sig, struct k_sigaction *ka,
  * the kernel can handle, and then we build all the user-level signal handling
  * stack-frames in one go after that.
  */
-int do_signal(struct pt_regs *regs, sigset_t *oldset)
+void do_signal(struct pt_regs *regs)
 {
        unsigned long retval = 0, continue_addr = 0, restart_addr = 0;
        siginfo_t info;
        int signr;
        struct k_sigaction ka;
+       sigset_t *oldset;
 
        /*
         * We want the common case to go fast, which
@@ -460,9 +432,11 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset)
         * if so.
         */
        if (!user_mode(regs))
-               return 1;
+               return;
 
-       if (!oldset)
+       if (test_thread_flag(TIF_RESTORE_SIGMASK))
+               oldset = &current->saved_sigmask;
+       else
                oldset = &current->blocked;
 
        /* Are we from a system call? */
@@ -473,12 +447,14 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset)
 
                /* Prepare for system call restart.  We do this here so that a
                   debugger will see the already changed PSW. */
-               if (retval == -ERESTARTNOHAND ||
-                   retval == -ERESTARTSYS ||
-                   retval == -ERESTARTNOINTR) {
+               switch (retval) {
+               case -ERESTARTNOHAND:
+               case -ERESTARTSYS:
+               case -ERESTARTNOINTR:
                        regs->gprs[2] = regs->orig_gpr2;
                        regs->psw.addr = restart_addr;
-               } else if (retval == -ERESTART_RESTARTBLOCK) {
+                       break;
+               case -ERESTART_RESTARTBLOCK:
                        regs->gprs[2] = -EINTR;
                }
        }
@@ -503,17 +479,38 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset)
                /* Whee!  Actually deliver the signal.  */
 #ifdef CONFIG_COMPAT
                if (test_thread_flag(TIF_31BIT)) {
-                       extern void handle_signal32(unsigned long sig,
-                                                   struct k_sigaction *ka,
-                                                   siginfo_t *info,
-                                                   sigset_t *oldset,
-                                                   struct pt_regs *regs);
-                       handle_signal32(signr, &ka, &info, oldset, regs);
-                       return 1;
+                       extern int handle_signal32(unsigned long sig,
+                                                  struct k_sigaction *ka,
+                                                  siginfo_t *info,
+                                                  sigset_t *oldset,
+                                                  struct pt_regs *regs);
+                       if (handle_signal32(
+                                   signr, &ka, &info, oldset, regs) == 0) {
+                               if (test_thread_flag(TIF_RESTORE_SIGMASK))
+                                       clear_thread_flag(TIF_RESTORE_SIGMASK);
+                       }
+                       return;
                }
 #endif
-               handle_signal(signr, &ka, &info, oldset, regs);
-               return 1;
+               if (handle_signal(signr, &ka, &info, oldset, regs) == 0) {
+                       /*
+                        * A signal was successfully delivered; the saved
+                        * sigmask will have been stored in the signal frame,
+                        * and will be restored by sigreturn, so we can simply
+                        * clear the TIF_RESTORE_SIGMASK flag.
+                        */
+                       if (test_thread_flag(TIF_RESTORE_SIGMASK))
+                               clear_thread_flag(TIF_RESTORE_SIGMASK);
+               }
+               return;
+       }
+
+       /*
+        * If there's no signal to deliver, we just put the saved sigmask back.
+        */
+       if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+               clear_thread_flag(TIF_RESTORE_SIGMASK);
+               sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
        }
 
        /* Restart a different system call. */
@@ -522,5 +519,4 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset)
                regs->gprs[2] = __NR_restart_syscall;
                set_thread_flag(TIF_RESTART_SVC);
        }
-       return 0;
 }
index 426d7cafdab307192219807fc565537cbfee848d..3280345efacd7c6e4c2cdd45c9f7e9b059748a13 100644 (file)
@@ -80,7 +80,7 @@ NI_SYSCALL                                                    /* old sgetmask syscall*/
 NI_SYSCALL                                                     /* old ssetmask syscall*/
 SYSCALL(sys_setreuid16,sys_ni_syscall,sys32_setreuid16_wrapper)        /* old setreuid16 syscall */
 SYSCALL(sys_setregid16,sys_ni_syscall,sys32_setregid16_wrapper)        /* old setregid16 syscall */
-SYSCALL(sys_sigsuspend_glue,sys_sigsuspend_glue,sys32_sigsuspend_glue)
+SYSCALL(sys_sigsuspend,sys_sigsuspend,sys_sigsuspend_wrapper)
 SYSCALL(sys_sigpending,sys_sigpending,compat_sys_sigpending_wrapper)
 SYSCALL(sys_sethostname,sys_sethostname,sys32_sethostname_wrapper)
 SYSCALL(sys_setrlimit,sys_setrlimit,compat_sys_setrlimit_wrapper)      /* 75 */
@@ -187,7 +187,7 @@ SYSCALL(sys_rt_sigprocmask,sys_rt_sigprocmask,sys32_rt_sigprocmask_wrapper) /* 1
 SYSCALL(sys_rt_sigpending,sys_rt_sigpending,sys32_rt_sigpending_wrapper)
 SYSCALL(sys_rt_sigtimedwait,sys_rt_sigtimedwait,compat_sys_rt_sigtimedwait_wrapper)
 SYSCALL(sys_rt_sigqueueinfo,sys_rt_sigqueueinfo,sys32_rt_sigqueueinfo_wrapper)
-SYSCALL(sys_rt_sigsuspend_glue,sys_rt_sigsuspend_glue,sys32_rt_sigsuspend_glue)
+SYSCALL(sys_rt_sigsuspend,sys_rt_sigsuspend,compat_sys_rt_sigsuspend_wrapper)
 SYSCALL(sys_pread64,sys_pread64,sys32_pread64_wrapper)         /* 180 */
 SYSCALL(sys_pwrite64,sys_pwrite64,sys32_pwrite64_wrapper)
 SYSCALL(sys_chown16,sys_ni_syscall,sys32_chown16_wrapper)      /* old chown16 syscall */
@@ -293,5 +293,21 @@ SYSCALL(sys_waitid,sys_waitid,compat_sys_waitid_wrapper)
 SYSCALL(sys_ioprio_set,sys_ioprio_set,sys_ioprio_set_wrapper)
 SYSCALL(sys_ioprio_get,sys_ioprio_get,sys_ioprio_get_wrapper)
 SYSCALL(sys_inotify_init,sys_inotify_init,sys_inotify_init)
-SYSCALL(sys_inotify_add_watch,sys_inotify_add_watch,sys_inotify_add_watch_wrapper)
+SYSCALL(sys_inotify_add_watch,sys_inotify_add_watch,sys_inotify_add_watch_wrapper)     /* 285 */
 SYSCALL(sys_inotify_rm_watch,sys_inotify_rm_watch,sys_inotify_rm_watch_wrapper)
+NI_SYSCALL                                                     /* 287 sys_migrate_pages */
+SYSCALL(sys_openat,sys_openat,compat_sys_openat_wrapper)
+SYSCALL(sys_mkdirat,sys_mkdirat,sys_mkdirat_wrapper)
+SYSCALL(sys_mknodat,sys_mknodat,sys_mknodat_wrapper)   /* 290 */
+SYSCALL(sys_fchownat,sys_fchownat,sys_fchownat_wrapper)
+SYSCALL(sys_futimesat,sys_futimesat,compat_sys_futimesat_wrapper)
+SYSCALL(sys_newfstatat,sys_newfstatat,compat_sys_newfstatat_wrapper)
+SYSCALL(sys_unlinkat,sys_unlinkat,sys_unlinkat_wrapper)
+SYSCALL(sys_renameat,sys_renameat,sys_renameat_wrapper)        /* 295 */
+SYSCALL(sys_linkat,sys_linkat,sys_linkat_wrapper)
+SYSCALL(sys_symlinkat,sys_symlinkat,sys_symlinkat_wrapper)
+SYSCALL(sys_readlinkat,sys_readlinkat,sys_readlinkat_wrapper)
+SYSCALL(sys_fchmodat,sys_fchmodat,sys_fchmodat_wrapper)
+SYSCALL(sys_faccessat,sys_faccessat,sys_faccessat_wrapper)     /* 300 */
+SYSCALL(sys_pselect6,sys_pselect6,compat_sys_pselect6_wrapper)
+SYSCALL(sys_ppoll,sys_ppoll,compat_sys_ppoll_wrapper)
index f3797a52c4ea5e06d5bca508c14706123ecd116e..8e0c7ed73d0312a811c5a3f887527747a6c669c3 100644 (file)
@@ -2,7 +2,7 @@
  *  include/asm-s390/thread_info.h
  *
  *  S390 version
- *    Copyright (C) 2002 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Copyright (C) IBM Corp. 2002,2006
  *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
  */
 
@@ -88,7 +88,7 @@ static inline struct thread_info *current_thread_info(void)
  * thread information flags bit numbers
  */
 #define TIF_SYSCALL_TRACE      0       /* syscall trace active */
-#define TIF_NOTIFY_RESUME      1       /* resumption notification requested */
+#define TIF_RESTORE_SIGMASK    1       /* restore signal mask in do_signal() */
 #define TIF_SIGPENDING         2       /* signal pending */
 #define TIF_NEED_RESCHED       3       /* rescheduling necessary */
 #define TIF_RESTART_SVC                4       /* restart svc with new svc number */
@@ -102,7 +102,7 @@ static inline struct thread_info *current_thread_info(void)
 #define TIF_MEMDIE             19
 
 #define _TIF_SYSCALL_TRACE     (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME     (1<<TIF_NOTIFY_RESUME)
+#define _TIF_RESTORE_SIGMASK   (1<<TIF_RESTORE_SIGMASK)
 #define _TIF_SIGPENDING                (1<<TIF_SIGPENDING)
 #define _TIF_NEED_RESCHED      (1<<TIF_NEED_RESCHED)
 #define _TIF_RESTART_SVC       (1<<TIF_RESTART_SVC)
index 2861cdc243ad5fd2d025c3524fd50d7dcb259a5e..29a9f357eb9ebc394b330738c9934eb44d5ba1d6 100644 (file)
 #define __NR_inotify_init      284
 #define __NR_inotify_add_watch 285
 #define __NR_inotify_rm_watch  286
+/* Number 287 is reserved for new sys_migrate_pages */
+#define __NR_openat            288
+#define __NR_mkdirat           289
+#define __NR_mknodat           290
+#define __NR_fchownat          291
+#define __NR_futimesat         292
+#define __NR_newfstatat                293
+#define __NR_unlinkat          294
+#define __NR_renameat          295
+#define __NR_linkat            296
+#define __NR_symlinkat         297
+#define __NR_readlinkat                298
+#define __NR_fchmodat          299
+#define __NR_faccessat         300
+#define __NR_pselect6          301
+#define __NR_ppoll             302
 
-#define NR_syscalls 287
+#define NR_syscalls 303
 
 /* 
  * There are some system calls that are not present on 64 bit, some
@@ -539,11 +555,15 @@ type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4,    \
 #define __ARCH_WANT_SYS_SIGPENDING
 #define __ARCH_WANT_SYS_SIGPROCMASK
 #define __ARCH_WANT_SYS_RT_SIGACTION
+#define __ARCH_WANT_SYS_RT_SIGSUSPEND
 # ifndef CONFIG_64BIT
 #   define __ARCH_WANT_STAT64
 #   define __ARCH_WANT_SYS_TIME
 # endif
-# define __ARCH_WANT_COMPAT_SYS_TIME
+# ifdef CONFIG_COMPAT
+#   define __ARCH_WANT_COMPAT_SYS_TIME
+#   define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND
+# endif
 #endif
 
 #ifdef __KERNEL_SYSCALLS__