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/*
* 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 <sys/mman.h>
#include <sys/stat.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 "kern_util.h"
#include "user.h"
#include "mem_user.h"
#include "init.h"
#include "ptrace_user.h"
#include "uml-config.h"
#include "os.h"
#include "longjmp.h"
#include "kern_constants.h"
void stack_protections(unsigned long address)
{
int prot = PROT_READ | PROT_WRITE | PROT_EXEC;
if(mprotect((void *) address, UM_KERN_PAGE_SIZE, prot) < 0)
panic("protecting stack failed, errno = %d", errno);
}
void task_protections(unsigned long address)
{
unsigned long guard = address + UM_KERN_PAGE_SIZE;
unsigned long stack = guard + UM_KERN_PAGE_SIZE;
int prot = 0, pages;
#ifdef notdef
if(mprotect((void *) stack, UM_KERN_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 * UM_KERN_PAGE_SIZE, prot) < 0)
panic("protecting stack failed, errno = %d", errno);
}
int raw(int fd)
{
struct termios tt;
int err;
CATCH_EINTR(err = tcgetattr(fd, &tt));
if(err < 0)
return -errno;
cfmakeraw(&tt);
CATCH_EINTR(err = tcsetattr(fd, TCSADRAIN, &tt));
if(err < 0)
return -errno;
/* XXX tcsetattr could have applied only some changes
* (and cfmakeraw() is a set of changes) */
return(0);
}
void setup_machinename(char *machine_out)
{
struct utsname host;
uname(&host);
#ifdef UML_CONFIG_UML_X86
# ifndef UML_CONFIG_64BIT
if (!strcmp(host.machine, "x86_64")) {
strcpy(machine_out, "i686");
return;
}
# else
if (!strcmp(host.machine, "i686")) {
strcpy(machine_out, "x86_64");
return;
}
# endif
#endif
strcpy(machine_out, host.machine);
}
void setup_hostinfo(char *buf, int len)
{
struct utsname host;
uname(&host);
snprintf(buf, len, "%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;
jmp_buf buf;
int n;
n = UML_SETJMP(&buf);
if(n == 0){
va_start(args, proc);
(*proc)(&buf, &args);
}
va_end(args);
return n;
}
void os_dump_core(void)
{
signal(SIGSEGV, SIG_DFL);
abort();
}
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