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Blackfin: add support for restart_syscall()

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Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2010-01-29 01:33:54 +00:00
parent 9e228ee9ea
commit ddaebcabbc
1 changed files with 9 additions and 0 deletions
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9
arch/blackfin/kernel/signal.c
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@ -17,6 +17,7 @@
#include <asm/cacheflush.h>
#include <asm/ucontext.h>
#include <asm/fixed_code.h>
#include <asm/syscall.h>
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
@ -50,6 +51,9 @@ rt_restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, int *p
unsigned long usp = 0;
int err = 0;
/* Always make any pending restarted system calls return -EINTR */
current_thread_info()->restart_block.fn = do_no_restart_syscall;
#define RESTORE(x) err |= __get_user(regs->x, &sc->sc_##x)
/* restore passed registers */
@ -237,6 +241,11 @@ handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
regs->r0 = regs->orig_r0;
regs->pc -= 2;
break;
case -ERESTART_RESTARTBLOCK:
regs->p0 = __NR_restart_syscall;
regs->pc -= 2;
break;
}
}