diff options
| author | Greg Ungerer <gerg@uclinux.org> | 2009-01-13 16:27:03 +1000 |
|---|---|---|
| committer | Greg Ungerer <gerg@uclinux.org> | 2009-01-27 16:42:03 +1000 |
| commit | f3221a39de12377e6eb76460abf95b08f7fb9178 (patch) | |
| tree | a858e395d82badd7b1f40e0b2c54d50a8ef8a7dc /arch | |
| parent | d88ffccbca0428e9b12feec45a2bc7f09efa1ab2 (diff) | |
| download | lwn-f3221a39de12377e6eb76460abf95b08f7fb9178.tar.gz lwn-f3221a39de12377e6eb76460abf95b08f7fb9178.zip | |
m68knommu: fix syscall restarting
Make restart blocks working, required for proper syscall restarting.
Derived from same changes for m68k arch by Andreas Schwab <schwab@suse.de>
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/m68knommu/kernel/signal.c | 15 | ||||
| -rw-r--r-- | arch/m68knommu/kernel/syscalltable.S | 2 |
2 files changed, 16 insertions, 1 deletions
diff --git a/arch/m68knommu/kernel/signal.c b/arch/m68knommu/kernel/signal.c index bbfcae9e52b4..5ab6a04af14e 100644 --- a/arch/m68knommu/kernel/signal.c +++ b/arch/m68knommu/kernel/signal.c @@ -279,6 +279,9 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext *usc, void *fp, struct sigcontext context; int err = 0; + /* 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; @@ -316,6 +319,9 @@ 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; @@ -692,6 +698,15 @@ 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/arch/m68knommu/kernel/syscalltable.S b/arch/m68knommu/kernel/syscalltable.S index 5c3e3f62194a..1017e76f3711 100644 --- a/arch/m68knommu/kernel/syscalltable.S +++ b/arch/m68knommu/kernel/syscalltable.S @@ -18,7 +18,7 @@ .text ALIGN ENTRY(sys_call_table) - .long sys_ni_syscall /* 0 - old "setup()" system call*/ + .long sys_restart_syscall /* 0 - old "setup()" system call */ .long sys_exit .long sys_fork .long sys_read |