Subversion Repositories openrisc_2011-10-31

/*

 * Standard x86 syscalls for user programs running under Cygmon

 *

 * Copyright (c) 1998, 2000 Cygnus Support

 *

 * The authors hereby grant permission to use, copy, modify, distribute,

 * and license this software and its documentation for any purpose, provided

 * that existing copyright notices are retained in all copies and that this

 * notice is included verbatim in any distributions. No written agreement,

 * license, or royalty fee is required for any of the authorized uses.

 * Modifications to this software may be copyrighted by their authors

 * and need not follow the licensing terms described here, provided that

 * the new terms are clearly indicated on the first page of each file where

 * they apply.

 */

#include <fcntl.h>

#include <stdlib.h>

#include "cygmon-syscall.h"

#include <sys/time.h>

extern int errno;

_syscall3(int,write,int,i,char *,c,int,len);

#if 0

_syscall3(int,read,int,i,char *,c,int,len);

#else

int

read (int des, char *dest, int len)

{

  return -1;

}

#endif

_syscall2(int,kill,int,pid,int,signal);

_syscall2(void,__install_signal_handler,int,arg,void *,handler);

_syscall1(char **,__get_program_arguments,int *,argc);

_syscall1(void,__sys_exit,int,exitcode);

_syscall1(void,putTtyChar,int,character);

_syscall1(time_t,time,time_t *,ptr);

_syscall2(int, gettimeofday, struct timeval *,time, void *,z);

_syscall3(int, __open, const char *, filename, int, mode, int, filemode);

_syscall4(void, profil, unsigned short *, buff, unsigned int, bufsiz,

          unsigned int, offset, unsigned int, scale);

_syscall1(int, close, int, fd);

/* Bleah. */

int

open (const char *filename, int mode, ...)

{

#if 0

  return __open (filename, mode, 0644);

#else

  return -1;

#endif

}

/* Ultra-super cheezy. */

int

isatty (int i)

{

  return i<3;

}

int unlink (const char *p)

{

  return -1;

}

char *

sbrk (int amt)

{

  extern char _end;

  static char *ptr = 0;

  char *res;

  if (ptr == 0)

    ptr = &_end;

  if (amt == 0)

    return (char *)ptr;

  if (((long)ptr) % 8)

    ptr = ptr + (8 - (((long)(ptr)) % 8));

  res = ptr;

  ptr += amt;

  return (char *)res;

}

void

_exit(int i)

{

  while(1) {

    __sys_exit (i);

    asm("       int $3");

  }

}

int

fstat(int des, struct stat *buf)

{

  return -1;

}

int

lseek(int des,unsigned long offset, int whence)

{

  return -1;

}

int

getpid ()

{

  return -1;

}

/* Simple replacement for the clock() syscall. */

clock_t

clock ()

{

  struct timeval t;

  gettimeofday (&t, 0);

  return t.tv_sec * 1000 + (t.tv_usec / 1000);

}

#if ! defined(COFF) && ! defined(AOUT)

typedef void (*ctp)();

void

__do_global_ctors ()

{

  extern int __CTOR_LIST__;

  int *c = &__CTOR_LIST__;

  c++;

  while (*c)

    {

      ctp d = (ctp)*c;

      (d)();

      c++;

    }

}

void

__do_global_dtors ()

{

  extern int __DTOR_LIST__;

  int *c = &__DTOR_LIST__;

  int *cp = c;

  c++;

  while (*c)

    {

      c++;

    }

  c--;

  while (c > cp)

    {

      ctp d = (ctp)*c;

      (*d)();

      c--;

    }

}

#endif

void

profil_write (int type, char *buffer, int len)

{

  static int des = -1;

  if (des < 0)

    {

      des = open ("gmon.out", O_WRONLY | O_CREAT | O_TRUNC, 0644);

    }

  if (len == 0)

    {

      close (des);

    }

  else

    {

      write (des, buffer, len);

    }

}