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| author | Will Deacon <will.deacon@arm.com> | 2012-07-19 17:46:44 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-07-28 11:11:51 +0100 |
| commit | ad82cc08f70486b5741560b1b2121dadf82897de (patch) | |
| tree | 4e95106f82bf8d7db53fbbec1c04b81c36b1243e /arch/arm/kernel/signal.c | |
| parent | ad722541147e6e517a2077e3d944105e7bc4fa8e (diff) | |
| download | linux-ad82cc08f70486b5741560b1b2121dadf82897de.tar.gz | |
ARM: 7470/1: Revert "7443/1: Revert "new way of handling ERESTART_RESTARTBLOCK""
This reverts commit 433e2f307beff8adba241646ce9108544e0c5a03. Conflicts: arch/arm/kernel/ptrace.c Reintroduce the new syscall restart handling in preparation for further patches from Al Viro. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel/signal.c')
| -rw-r--r-- | arch/arm/kernel/signal.c | 33 |
1 files changed, 6 insertions, 27 deletions
diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c index 536c5d6b340b..6d3bce5bd7bc 100644 --- a/arch/arm/kernel/signal.c +++ b/arch/arm/kernel/signal.c @@ -605,12 +605,10 @@ static void do_signal(struct pt_regs *regs, int syscall) case -ERESTARTNOHAND: case -ERESTARTSYS: case -ERESTARTNOINTR: + case -ERESTART_RESTARTBLOCK: regs->ARM_r0 = regs->ARM_ORIG_r0; regs->ARM_pc = restart_addr; break; - case -ERESTART_RESTARTBLOCK: - regs->ARM_r0 = -EINTR; - break; } } @@ -626,12 +624,14 @@ static void do_signal(struct pt_regs *regs, int syscall) * debugger has chosen to restart at a different PC. */ if (regs->ARM_pc == restart_addr) { - if (retval == -ERESTARTNOHAND + if (retval == -ERESTARTNOHAND || + retval == -ERESTART_RESTARTBLOCK || (retval == -ERESTARTSYS && !(ka.sa.sa_flags & SA_RESTART))) { regs->ARM_r0 = -EINTR; regs->ARM_pc = continue_addr; } + clear_thread_flag(TIF_SYSCALL_RESTARTSYS); } handle_signal(signr, &ka, &info, regs); @@ -645,29 +645,8 @@ static void do_signal(struct pt_regs *regs, int syscall) * ignore the restart. */ if (retval == -ERESTART_RESTARTBLOCK - && regs->ARM_pc == continue_addr) { - if (thumb_mode(regs)) { - regs->ARM_r7 = __NR_restart_syscall - __NR_SYSCALL_BASE; - regs->ARM_pc -= 2; - } else { -#if defined(CONFIG_AEABI) && !defined(CONFIG_OABI_COMPAT) - regs->ARM_r7 = __NR_restart_syscall; - regs->ARM_pc -= 4; -#else - u32 __user *usp; - - regs->ARM_sp -= 4; - usp = (u32 __user *)regs->ARM_sp; - - if (put_user(regs->ARM_pc, usp) == 0) { - regs->ARM_pc = KERN_RESTART_CODE; - } else { - regs->ARM_sp += 4; - force_sigsegv(0, current); - } -#endif - } - } + && regs->ARM_pc == restart_addr) + set_thread_flag(TIF_SYSCALL_RESTARTSYS); } restore_saved_sigmask(); |