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s390: Use get_signal() signal_setup_done()

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Use the more generic functions get_signal() signal_setup_done()
for signal delivery.

Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Richard Weinberger
2014-07-13 22:21:03 +02:00
committed by Richard Weinberger
parent 129b69df9c
commit 067bf2d4d3
3 changed files with 69 additions and 92 deletions
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79
arch/s390/kernel/compat_signal.c
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@@ -320,38 +320,39 @@ static inline int map_signal(int sig)
return sig;
}
static int setup_frame32(int sig, struct k_sigaction *ka,
sigset_t *set, struct pt_regs * regs)
static int setup_frame32(struct ksignal *ksig, sigset_t *set,
struct pt_regs *regs)
{
sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(sigframe32));
int sig = ksig->sig;
sigframe32 __user *frame = get_sigframe(&ksig->ka, regs, sizeof(sigframe32));
if (frame == (void __user *) -1UL)
goto give_sigsegv;
return -EFAULT;
if (__copy_to_user(&frame->sc.oldmask, &set->sig, _SIGMASK_COPY_SIZE32))
goto give_sigsegv;
return -EFAULT;
if (save_sigregs32(regs, &frame->sregs))
goto give_sigsegv;
return -EFAULT;
if (save_sigregs_gprs_high(regs, frame->gprs_high))
goto give_sigsegv;
return -EFAULT;
if (__put_user((unsigned long) &frame->sregs, &frame->sc.sregs))
goto give_sigsegv;
return -EFAULT;
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
if (ka->sa.sa_flags & SA_RESTORER) {
regs->gprs[14] = (__u64 __force) ka->sa.sa_restorer | PSW32_ADDR_AMODE;
if (ksig->ka.sa.sa_flags & SA_RESTORER) {
regs->gprs[14] = (__u64 __force) ksig->ka.sa.sa_restorer | PSW32_ADDR_AMODE;
} else {
regs->gprs[14] = (__u64 __force) frame->retcode | PSW32_ADDR_AMODE;
if (__put_user(S390_SYSCALL_OPCODE | __NR_sigreturn,
(u16 __force __user *)(frame->retcode)))
goto give_sigsegv;
return -EFAULT;
}
/* Set up backchain. */
if (__put_user(regs->gprs[15], (unsigned int __user *) frame))
goto give_sigsegv;
return -EFAULT;
/* Set up registers for signal handler */
regs->gprs[15] = (__force __u64) frame;
@@ -359,7 +360,7 @@ static int setup_frame32(int sig, struct k_sigaction *ka,
regs->psw.mask = PSW_MASK_BA |
(PSW_USER_BITS & PSW_MASK_ASC) |
(regs->psw.mask & ~PSW_MASK_ASC);
regs->psw.addr = (__force __u64) ka->sa.sa_handler;
regs->psw.addr = (__force __u64) ksig->ka.sa.sa_handler;
regs->gprs[2] = map_signal(sig);
regs->gprs[3] = (__force __u64) &frame->sc;
@@ -376,25 +377,21 @@ static int 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 __force __user *) &frame->signo))
goto give_sigsegv;
return -EFAULT;
return 0;
give_sigsegv:
force_sigsegv(sig, current);
return -EFAULT;
}
static int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *set, struct pt_regs * regs)
static int setup_rt_frame32(struct ksignal *ksig, sigset_t *set,
struct pt_regs *regs)
{
int err = 0;
rt_sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(rt_sigframe32));
rt_sigframe32 __user *frame = get_sigframe(&ksig->ka, regs, sizeof(rt_sigframe32));
if (frame == (void __user *) -1UL)
goto give_sigsegv;
return -EFAULT;
if (copy_siginfo_to_user32(&frame->info, info))
goto give_sigsegv;
if (copy_siginfo_to_user32(&frame->info, &ksig->info))
return -EFAULT;
/* Create the ucontext. */
err |= __put_user(UC_EXTENDED, &frame->uc.uc_flags);
@@ -404,22 +401,22 @@ static int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info,
err |= save_sigregs_gprs_high(regs, frame->gprs_high);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
if (err)
goto give_sigsegv;
return -EFAULT;
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
if (ka->sa.sa_flags & SA_RESTORER) {
regs->gprs[14] = (__u64 __force) ka->sa.sa_restorer | PSW32_ADDR_AMODE;
if (ksig->ka.sa.sa_flags & SA_RESTORER) {
regs->gprs[14] = (__u64 __force) ksig->ka.sa.sa_restorer | PSW32_ADDR_AMODE;
} else {
regs->gprs[14] = (__u64 __force) frame->retcode | PSW32_ADDR_AMODE;
if (__put_user(S390_SYSCALL_OPCODE | __NR_rt_sigreturn,
(u16 __force __user *)(frame->retcode)))
goto give_sigsegv;
return -EFAULT;
}
/* Set up backchain. */
if (__put_user(regs->gprs[15], (unsigned int __force __user *) frame))
goto give_sigsegv;
return -EFAULT;
/* Set up registers for signal handler */
regs->gprs[15] = (__force __u64) frame;
@@ -427,36 +424,30 @@ static int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info,
regs->psw.mask = PSW_MASK_BA |
(PSW_USER_BITS & PSW_MASK_ASC) |
(regs->psw.mask & ~PSW_MASK_ASC);
regs->psw.addr = (__u64 __force) ka->sa.sa_handler;
regs->psw.addr = (__u64 __force) ksig->ka.sa.sa_handler;
regs->gprs[2] = map_signal(sig);
regs->gprs[2] = map_signal(ksig->sig);
regs->gprs[3] = (__force __u64) &frame->info;
regs->gprs[4] = (__force __u64) &frame->uc;
regs->gprs[5] = task_thread_info(current)->last_break;
return 0;
give_sigsegv:
force_sigsegv(sig, current);
return -EFAULT;
}
/*
* OK, we're invoking a handler
*/
void handle_signal32(unsigned long sig, struct k_sigaction *ka,
siginfo_t *info, sigset_t *oldset, struct pt_regs *regs)
void handle_signal32(struct ksignal *ksig, sigset_t *oldset,
struct pt_regs *regs)
{
int ret;
/* Set up the stack frame */
if (ka->sa.sa_flags & SA_SIGINFO)
ret = setup_rt_frame32(sig, ka, info, oldset, regs);
if (ksig->ka.sa.sa_flags & SA_SIGINFO)
ret = setup_rt_frame32(ksig, oldset, regs);
else
ret = setup_frame32(sig, ka, oldset, regs);
if (ret)
return;
signal_delivered(sig, info, ka, regs,
test_thread_flag(TIF_SINGLE_STEP));
ret = setup_frame32(ksig, oldset, regs);
signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLE_STEP));
}