uml: remove unused file

/*

 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)

 * Licensed under the GPL

 */

#include <stdio.h>

#include <unistd.h>

#include <signal.h>

#include <sched.h>

#include <errno.h>

#include <stdarg.h>

#include <stdlib.h>

#include <sys/time.h>

#include <sys/ptrace.h>

#include <linux/ptrace.h>

#include <sys/wait.h>

#include <sys/mman.h>

#include <asm/ptrace.h>

#include <asm/unistd.h>

#include "kern_util.h"

#include "user.h"

#include "signal_kern.h"

#include "sysdep/ptrace.h"

#include "sysdep/sigcontext.h"

#include "irq_user.h"

#include "ptrace_user.h"

#include "init.h"

#include "os.h"

#include "uml-config.h"

#include "choose-mode.h"

#include "mode.h"

#include "tempfile.h"

#include "kern_constants.h"

int protect_memory(unsigned long addr, unsigned long len, int r, int w, int x,

		   int must_succeed)

{

	int err;

	err = os_protect_memory((void *) addr, len, r, w, x);

	if(err < 0){

                if(must_succeed)

			panic("protect failed, err = %d", -err);

		else return(err);

	}

	return(0);

}

void kill_child_dead(int pid)

{

	kill(pid, SIGKILL);

	kill(pid, SIGCONT);

	do {

		int n;

		CATCH_EINTR(n = waitpid(pid, NULL, 0));

		if (n > 0)

			kill(pid, SIGCONT);

		else

			break;

	} while(1);

}

void stop(void)

{

	while(1) sleep(1000000);

}

int wait_for_stop(int pid, int sig, int cont_type, void *relay)

{

	sigset_t *relay_signals = relay;

	int status, ret;

	while(1){

		CATCH_EINTR(ret = waitpid(pid, &status, WUNTRACED));

		if((ret < 0) ||

		   !WIFSTOPPED(status) || (WSTOPSIG(status) != sig)){

			if(ret < 0){

				printk("wait failed, errno = %d\n",

				       errno);

			}

			else if(WIFEXITED(status))

				printk("process %d exited with status %d\n",

				       pid, WEXITSTATUS(status));

			else if(WIFSIGNALED(status))

				printk("process %d exited with signal %d\n",

				       pid, WTERMSIG(status));

			else if((WSTOPSIG(status) == SIGVTALRM) ||

				(WSTOPSIG(status) == SIGALRM) ||

				(WSTOPSIG(status) == SIGIO) ||

				(WSTOPSIG(status) == SIGPROF) ||

				(WSTOPSIG(status) == SIGCHLD) ||

				(WSTOPSIG(status) == SIGWINCH) ||

				(WSTOPSIG(status) == SIGINT)){

				ptrace(cont_type, pid, 0, WSTOPSIG(status));

				continue;

			}

			else if((relay_signals != NULL) &&

				sigismember(relay_signals, WSTOPSIG(status))){

				ptrace(cont_type, pid, 0, WSTOPSIG(status));

				continue;

			}

			else printk("process %d stopped with signal %d\n",

				    pid, WSTOPSIG(status));

			panic("wait_for_stop failed to wait for %d to stop "

			      "with %d\n", pid, sig);

		}

		return(status);

	}

}

void forward_ipi(int fd, int pid)

{

	int err;

	err = os_set_owner(fd, pid);

	if(err < 0)

		printk("forward_ipi: set_owner failed, fd = %d, me = %d, "

		       "target = %d, err = %d\n", fd, os_getpid(), pid, -err);

}

/*

 *-------------------------

 * only for tt mode (will be deleted in future...)

 *-------------------------

 */

struct tramp {

	int (*tramp)(void *);

	void *tramp_data;

	unsigned long temp_stack;

	int flags;

	int pid;

};

/* See above for why sigkill is here */

int sigkill = SIGKILL;

int outer_tramp(void *arg)

{

	struct tramp *t;

	int sig = sigkill;

	t = arg;

	t->pid = clone(t->tramp, (void *) t->temp_stack + UM_KERN_PAGE_SIZE/2,

		       t->flags, t->tramp_data);

	if(t->pid > 0) wait_for_stop(t->pid, SIGSTOP, PTRACE_CONT, NULL);

	kill(os_getpid(), sig);

	_exit(0);

}

int start_fork_tramp(void *thread_arg, unsigned long temp_stack,

		     int clone_flags, int (*tramp)(void *))

{

	struct tramp arg;

	unsigned long sp;

	int new_pid, status, err;

	/* The trampoline will run on the temporary stack */

	sp = stack_sp(temp_stack);

	clone_flags |= CLONE_FILES | SIGCHLD;

	arg.tramp = tramp;

	arg.tramp_data = thread_arg;

	arg.temp_stack = temp_stack;

	arg.flags = clone_flags;

	/* Start the process and wait for it to kill itself */

	new_pid = clone(outer_tramp, (void *) sp, clone_flags, &arg);

	if(new_pid < 0)

		return(new_pid);

	CATCH_EINTR(err = waitpid(new_pid, &status, 0));

	if(err < 0)

		panic("Waiting for outer trampoline failed - errno = %d",

		      errno);

	if(!WIFSIGNALED(status) || (WTERMSIG(status) != SIGKILL))

		panic("outer trampoline didn't exit with SIGKILL, "

		      "status = %d", status);

	return(arg.pid);

}

void forward_pending_sigio(int target)

{

	sigset_t sigs;

	if(sigpending(&sigs))

		panic("forward_pending_sigio : sigpending failed");

	if(sigismember(&sigs, SIGIO))

		kill(target, SIGIO);

}