blob: f3afe27d3f31746de87ad0076992f4dd053efe1c [file] [log] [blame]
/*
* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <limits.h>
#include <setjmp.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/ptrace.h>
#include <sys/utsname.h>
#include <sys/param.h>
#include <sys/time.h>
#include "asm/types.h"
#include <ctype.h>
#include <signal.h>
#include <wait.h>
#include <errno.h>
#include <stdarg.h>
#include <sched.h>
#include <termios.h>
#include <string.h>
#include "user_util.h"
#include "kern_util.h"
#include "user.h"
#include "mem_user.h"
#include "init.h"
#include "helper.h"
#include "uml-config.h"
#define COMMAND_LINE_SIZE _POSIX_ARG_MAX
/* Changed in linux_main and setup_arch, which run before SMP is started */
char saved_command_line[COMMAND_LINE_SIZE] = { 0 };
char command_line[COMMAND_LINE_SIZE] = { 0 };
void add_arg(char *cmd_line, char *arg)
{
if (strlen(cmd_line) + strlen(arg) + 1 > COMMAND_LINE_SIZE) {
printf("add_arg: Too much command line!\n");
exit(1);
}
if(strlen(cmd_line) > 0) strcat(cmd_line, " ");
strcat(cmd_line, arg);
}
void stop(void)
{
while(1) sleep(1000000);
}
void stack_protections(unsigned long address)
{
int prot = PROT_READ | PROT_WRITE | PROT_EXEC;
if(mprotect((void *) address, page_size(), prot) < 0)
panic("protecting stack failed, errno = %d", errno);
}
void task_protections(unsigned long address)
{
unsigned long guard = address + page_size();
unsigned long stack = guard + page_size();
int prot = 0, pages;
#ifdef notdef
if(mprotect((void *) guard, page_size(), prot) < 0)
panic("protecting guard page failed, errno = %d", errno);
#endif
pages = (1 << UML_CONFIG_KERNEL_STACK_ORDER) - 2;
prot = PROT_READ | PROT_WRITE | PROT_EXEC;
if(mprotect((void *) stack, pages * page_size(), prot) < 0)
panic("protecting stack failed, errno = %d", errno);
}
int wait_for_stop(int pid, int sig, int cont_type, void *relay)
{
sigset_t *relay_signals = relay;
int status, ret;
while(1){
ret = waitpid(pid, &status, WUNTRACED);
if((ret < 0) ||
!WIFSTOPPED(status) || (WSTOPSIG(status) != sig)){
if(ret < 0){
if(errno == EINTR) continue;
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);
}
}
int raw(int fd, int complain)
{
struct termios tt;
int err;
tcgetattr(fd, &tt);
cfmakeraw(&tt);
err = tcsetattr(fd, TCSANOW, &tt);
if((err < 0) && complain){
printk("tcsetattr failed, errno = %d\n", errno);
return(-errno);
}
return(0);
}
void setup_machinename(char *machine_out)
{
struct utsname host;
uname(&host);
strcpy(machine_out, host.machine);
}
char host_info[(_UTSNAME_LENGTH + 1) * 4 + _UTSNAME_NODENAME_LENGTH + 1];
void setup_hostinfo(void)
{
struct utsname host;
uname(&host);
sprintf(host_info, "%s %s %s %s %s", host.sysname, host.nodename,
host.release, host.version, host.machine);
}
int setjmp_wrapper(void (*proc)(void *, void *), ...)
{
va_list args;
sigjmp_buf buf;
int n;
n = sigsetjmp(buf, 1);
if(n == 0){
va_start(args, proc);
(*proc)(&buf, &args);
}
va_end(args);
return(n);
}
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
* adjust the settings for this buffer only. This must remain at the end
* of the file.
* ---------------------------------------------------------------------------
* Local variables:
* c-file-style: "linux"
* End:
*/