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[PATCH] s390: Add support for new syscalls/TIF_RESTORE_SIGMASK
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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>
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Heiko Carstens authored and Linus Torvalds committed Feb 1, 2006
1 parent 1ab865c commit 54dfe5d
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Showing 8 changed files with 297 additions and 266 deletions.
102 changes: 23 additions & 79 deletions arch/s390/kernel/compat_signal.c
View file
Original file line number Diff line number Diff line change
@@ -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)
*
Expand Down Expand Up @@ -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;
Expand Down Expand Up @@ -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)
Expand Down Expand Up @@ -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));
Expand Down Expand Up @@ -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;
Expand Down Expand Up @@ -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;
}

137 changes: 132 additions & 5 deletions arch/s390/kernel/compat_wrapper.S
View file
Original file line number Diff line number Diff line change
@@ -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)
*/
Expand Down Expand Up @@ -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:
Expand Down Expand Up @@ -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:
Expand Down Expand Up @@ -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
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