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/*
* linux/arch/sparc/kernel/signal.c
*
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
*/
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/signal.h>
#include <linux/errno.h>
#include <linux/wait.h>
#include <linux/ptrace.h>
#include <linux/unistd.h>
#include <asm/segment.h>
#define _S(nr) (1<<((nr)-1))
#define _BLOCKABLE (~(_S(SIGKILL) | _S(SIGSTOP)))
asmlinkage int sys_waitpid(pid_t pid,unsigned long * stat_addr, int options);
/*
* atomically swap in the new signal mask, and wait for a signal.
*/
asmlinkage int sys_sigsuspend(int restart, unsigned long oldmask, unsigned long set)
{
unsigned long mask;
struct pt_regs * regs = (struct pt_regs *) &restart;
mask = current->blocked;
current->blocked = set & _BLOCKABLE;
while (1) {
current->state = TASK_INTERRUPTIBLE;
schedule();
if (do_signal(mask,regs))
return -EINTR;
}
}
asmlinkage int sys_sigreturn(unsigned long __unused)
{
halt();
return 0;
}
/*
* Set up a signal frame... Make the stack look the way iBCS2 expects
* it to look.
*/
void setup_frame(struct sigaction * sa, unsigned long ** fp, unsigned long eip,
struct pt_regs * regs, int signr, unsigned long oldmask)
{
halt();
}
/*
* Note that 'init' is a special process: it doesn't get signals it doesn't
* want to handle. Thus you cannot kill init even with a SIGKILL even by
* mistake.
*
* Note that we go through the signals twice: once to check the signals that
* the kernel can handle, and then we build all the user-level signal handling
* stack-frames in one go after that.
*/
asmlinkage int do_signal(unsigned long oldmask, struct pt_regs * regs)
{
halt();
return 1;
}
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