diff options
Diffstat (limited to 'arch/s390/kernel/signal.c')
| -rw-r--r-- | arch/s390/kernel/signal.c | 55 |
1 files changed, 24 insertions, 31 deletions
diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c index e6fca5498e1f..38258f817048 100644 --- a/arch/s390/kernel/signal.c +++ b/arch/s390/kernel/signal.c @@ -16,6 +16,7 @@ #include <linux/smp.h> #include <linux/kernel.h> #include <linux/signal.h> +#include <linux/entry-common.h> #include <linux/errno.h> #include <linux/wait.h> #include <linux/ptrace.h> @@ -24,13 +25,13 @@ #include <linux/tty.h> #include <linux/personality.h> #include <linux/binfmts.h> -#include <linux/tracehook.h> #include <linux/syscalls.h> #include <linux/compat.h> #include <asm/ucontext.h> #include <linux/uaccess.h> #include <asm/lowcore.h> #include <asm/switch_to.h> +#include <asm/vdso.h> #include "entry.h" /* @@ -139,7 +140,7 @@ static int restore_sigregs(struct pt_regs *regs, _sigregs __user *sregs) { _sigregs user_sregs; - /* Alwys make any pending restarted system call return -EINTR */ + /* Always make any pending restarted system call return -EINTR */ current->restart_block.fn = do_no_restart_syscall; if (__copy_from_user(&user_sregs, sregs, sizeof(user_sregs))) @@ -332,15 +333,10 @@ static int setup_frame(int sig, struct k_sigaction *ka, /* Set up to return from userspace. If provided, use a stub already in userspace. */ - if (ka->sa.sa_flags & SA_RESTORER) { + if (ka->sa.sa_flags & SA_RESTORER) restorer = (unsigned long) ka->sa.sa_restorer; - } else { - /* Signal frame without vector registers are short ! */ - __u16 __user *svc = (void __user *) frame + frame_size - 2; - if (__put_user(S390_SYSCALL_OPCODE | __NR_sigreturn, svc)) - return -EFAULT; - restorer = (unsigned long) svc; - } + else + restorer = VDSO64_SYMBOL(current, sigreturn); /* Set up registers for signal handler */ regs->gprs[14] = restorer; @@ -395,14 +391,10 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set, /* Set up to return from userspace. If provided, use a stub already in userspace. */ - if (ksig->ka.sa.sa_flags & SA_RESTORER) { + if (ksig->ka.sa.sa_flags & SA_RESTORER) restorer = (unsigned long) ksig->ka.sa.sa_restorer; - } else { - __u16 __user *svc = &frame->svc_insn; - if (__put_user(S390_SYSCALL_OPCODE | __NR_rt_sigreturn, svc)) - return -EFAULT; - restorer = (unsigned long) svc; - } + else + restorer = VDSO64_SYMBOL(current, rt_sigreturn); /* Create siginfo on the signal stack */ if (copy_siginfo_to_user(&frame->info, &ksig->info)) @@ -459,7 +451,8 @@ static void handle_signal(struct ksignal *ksig, sigset_t *oldset, * the kernel can handle, and then we build all the user-level signal handling * stack-frames in one go after that. */ -void do_signal(struct pt_regs *regs) + +void arch_do_signal_or_restart(struct pt_regs *regs) { struct ksignal ksig; sigset_t *oldset = sigmask_to_save(); @@ -487,7 +480,7 @@ void do_signal(struct pt_regs *regs) regs->gprs[2] = -EINTR; break; } - /* fallthrough */ + fallthrough; case -ERESTARTNOINTR: regs->gprs[2] = regs->orig_gpr2; regs->psw.addr = @@ -498,6 +491,7 @@ void do_signal(struct pt_regs *regs) } /* No longer in a system call */ clear_pt_regs_flag(regs, PIF_SYSCALL); + rseq_signal_deliver(&ksig, regs); if (is_compat_task()) handle_signal32(&ksig, oldset, regs); @@ -513,16 +507,22 @@ void do_signal(struct pt_regs *regs) switch (regs->gprs[2]) { case -ERESTART_RESTARTBLOCK: /* Restart with sys_restart_syscall */ - regs->int_code = __NR_restart_syscall; - /* fallthrough */ + regs->gprs[2] = regs->orig_gpr2; + current->restart_block.arch_data = regs->psw.addr; + if (is_compat_task()) + regs->psw.addr = VDSO32_SYMBOL(current, restart_syscall); + else + regs->psw.addr = VDSO64_SYMBOL(current, restart_syscall); + if (test_thread_flag(TIF_SINGLE_STEP)) + clear_thread_flag(TIF_PER_TRAP); + break; case -ERESTARTNOHAND: case -ERESTARTSYS: case -ERESTARTNOINTR: - /* Restart system call with magic TIF bit. */ regs->gprs[2] = regs->orig_gpr2; - set_pt_regs_flag(regs, PIF_SYSCALL); + regs->psw.addr = __rewind_psw(regs->psw, regs->int_code >> 16); if (test_thread_flag(TIF_SINGLE_STEP)) - clear_pt_regs_flag(regs, PIF_PER_TRAP); + clear_thread_flag(TIF_PER_TRAP); break; } } @@ -532,10 +532,3 @@ void do_signal(struct pt_regs *regs) */ restore_saved_sigmask(); } - -void do_notify_resume(struct pt_regs *regs) -{ - clear_thread_flag(TIF_NOTIFY_RESUME); - tracehook_notify_resume(regs); - rseq_handle_notify_resume(NULL, regs); -} |