diff options
| author | Andreas Schwab <schwab@suse.de> | 2008-12-29 19:34:57 +0100 |
|---|---|---|
| committer | Geert Uytterhoeven <geert@linux-m68k.org> | 2009-01-12 20:56:43 +0100 |
| commit | c162564ebf001e79448e8aa7a6e0ffee00b55f74 (patch) | |
| tree | 5a767647c24ff5388726a00fa370013a24577e3a | |
| parent | 1fa0b29f3a43f9dd8080d24cd16790b15ef963f5 (diff) | |
m68k: Wire up sys_restart_syscall
Make restart blocks working, required for proper syscall restarting.
Signed-off-by: Andreas Schwab <schwab@suse.de>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
| -rw-r--r-- | arch/m68k/kernel/entry.S | 2 | ||||
| -rw-r--r-- | arch/m68k/kernel/signal.c | 15 | ||||
| -rw-r--r-- | include/asm-m68k/unistd.h | 4 |
3 files changed, 17 insertions, 4 deletions
diff --git a/arch/m68k/kernel/entry.S b/arch/m68k/kernel/entry.S index f28404d9a2bc..5b780826647c 100644 --- a/arch/m68k/kernel/entry.S +++ b/arch/m68k/kernel/entry.S @@ -424,7 +424,7 @@ resume: .data ALIGN sys_call_table: - .long sys_ni_syscall /* 0 - old "setup()" system call*/ + .long sys_restart_syscall /* 0 - old "setup()" system call, used for restarting */ .long sys_exit .long sys_fork .long sys_read diff --git a/arch/m68k/kernel/signal.c b/arch/m68k/kernel/signal.c index f9af893cd289..de2d05ddd86d 100644 --- a/arch/m68k/kernel/signal.c +++ b/arch/m68k/kernel/signal.c @@ -326,6 +326,9 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *usc, void __u struct sigcontext context; int err; + /* Always make any pending restarted system calls return -EINTR */ + current_thread_info()->restart_block.fn = do_no_restart_syscall; + /* get previous context */ if (copy_from_user(&context, usc, sizeof(context))) goto badframe; @@ -411,6 +414,9 @@ rt_restore_ucontext(struct pt_regs *regs, struct switch_stack *sw, unsigned long usp; int err; + /* Always make any pending restarted system calls return -EINTR */ + current_thread_info()->restart_block.fn = do_no_restart_syscall; + err = __get_user(temp, &uc->uc_mcontext.version); if (temp != MCONTEXT_VERSION) goto badframe; @@ -937,6 +943,15 @@ handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler) regs->d0 = -EINTR; break; + case -ERESTART_RESTARTBLOCK: + if (!has_handler) { + regs->d0 = __NR_restart_syscall; + regs->pc -= 2; + break; + } + regs->d0 = -EINTR; + break; + case -ERESTARTSYS: if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) { regs->d0 = -EINTR; diff --git a/include/asm-m68k/unistd.h b/include/asm-m68k/unistd.h index 965abb8bc7ff..3c19027331fa 100644 --- a/include/asm-m68k/unistd.h +++ b/include/asm-m68k/unistd.h @@ -5,6 +5,7 @@ * This file contains the system call numbers. */ +#define __NR_restart_syscall 0 #define __NR_exit 1 #define __NR_fork 2 #define __NR_read 3 @@ -359,9 +360,6 @@ #define __ARCH_WANT_SYS_SIGPROCMASK #define __ARCH_WANT_SYS_RT_SIGACTION -/* whitelist for checksyscalls */ -#define __IGNORE_restart_syscall - /* * "Conditional" syscalls * |