mirror of
https://github.com/autc04/Retro68.git
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183 lines
3.2 KiB
C
183 lines
3.2 KiB
C
/*
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* Standard x86 syscalls for user programs running under Cygmon
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*
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* Copyright (c) 1998, 2000 Cygnus Support
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*
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* The authors hereby grant permission to use, copy, modify, distribute,
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* and license this software and its documentation for any purpose, provided
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* that existing copyright notices are retained in all copies and that this
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* notice is included verbatim in any distributions. No written agreement,
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* license, or royalty fee is required for any of the authorized uses.
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* Modifications to this software may be copyrighted by their authors
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* and need not follow the licensing terms described here, provided that
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* the new terms are clearly indicated on the first page of each file where
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* they apply.
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*/
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#include <fcntl.h>
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#include <stdlib.h>
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#include "cygmon-syscall.h"
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#include <sys/time.h>
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extern int errno;
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_syscall3(int,write,int,i,char *,c,int,len);
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#if 0
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_syscall3(int,read,int,i,char *,c,int,len);
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#else
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int
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read (int des, char *dest, int len)
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{
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return -1;
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}
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#endif
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_syscall2(int,kill,int,pid,int,signal);
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_syscall2(void,__install_signal_handler,int,arg,void *,handler);
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_syscall1(char **,__get_program_arguments,int *,argc);
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_syscall1(void,__sys_exit,int,exitcode);
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_syscall1(void,putTtyChar,int,character);
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_syscall1(time_t,time,time_t *,ptr);
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_syscall2(int, gettimeofday, struct timeval *,time, void *,z);
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_syscall3(int, __open, const char *, filename, int, mode, int, filemode);
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_syscall4(void, profil, unsigned short *, buff, unsigned int, bufsiz,
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unsigned int, offset, unsigned int, scale);
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_syscall1(int, close, int, fd);
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/* Bleah. */
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int
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open (const char *filename, int mode, ...)
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{
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#if 0
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return __open (filename, mode, 0644);
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#else
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return -1;
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#endif
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}
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/* Ultra-super cheezy. */
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int
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isatty (int i)
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{
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return i<3;
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}
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int unlink (const char *p)
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{
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return -1;
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}
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char *
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sbrk (int amt)
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{
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extern char _end;
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static char *ptr = 0;
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char *res;
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if (ptr == 0)
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ptr = &_end;
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if (amt == 0)
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return (char *)ptr;
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if (((long)ptr) % 8)
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ptr = ptr + (8 - (((long)(ptr)) % 8));
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res = ptr;
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ptr += amt;
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return (char *)res;
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}
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void
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_exit(int i)
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{
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while(1) {
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__sys_exit (i);
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asm(" int $3");
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}
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}
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int
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fstat(int des, struct stat *buf)
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{
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return -1;
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}
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int
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lseek(int des,unsigned long offset, int whence)
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{
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return -1;
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}
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int
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getpid ()
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{
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return -1;
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}
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/* Simple replacement for the clock() syscall. */
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clock_t
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clock ()
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{
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struct timeval t;
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gettimeofday (&t, 0);
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return t.tv_sec * 1000 + (t.tv_usec / 1000);
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}
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#if ! defined(COFF) && ! defined(AOUT)
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typedef void (*ctp)();
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void
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__do_global_ctors ()
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{
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extern int __CTOR_LIST__;
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int *c = &__CTOR_LIST__;
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c++;
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while (*c)
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{
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ctp d = (ctp)*c;
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(d)();
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c++;
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}
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}
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void
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__do_global_dtors ()
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{
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extern int __DTOR_LIST__;
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int *c = &__DTOR_LIST__;
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int *cp = c;
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c++;
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while (*c)
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{
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c++;
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}
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c--;
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while (c > cp)
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{
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ctp d = (ctp)*c;
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(*d)();
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c--;
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}
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}
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#endif
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void
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profil_write (int type, char *buffer, int len)
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{
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static int des = -1;
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if (des < 0)
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{
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des = open ("gmon.out", O_WRONLY | O_CREAT | O_TRUNC, 0644);
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}
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if (len == 0)
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{
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close (des);
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}
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else
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{
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write (des, buffer, len);
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}
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}
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