mes/lib/libc-mes+tcc.c

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/* -*-comment-start: "//";comment-end:""-*-
* Mes --- Maxwell Equations of Software
* Copyright © 2017 Jan Nieuwenhuizen <janneke@gnu.org>
*
* This file is part of Mes.
*
* Mes is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* Mes is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Mes. If not, see <http://www.gnu.org/licenses/>.
*/
#include <setjmp.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <signal.h>
#include <sys/mman.h>
#include <sys/time.h>
#include <unistd.h>
#if !__GNUC__ && !__TINYC__
#include <libc-mes.c>
#include <getopt.c>
int errno;
int
close (int fd)
{
asm ("mov____0x8(%ebp),%ebx !8");
asm ("mov____$i32,%eax SYS_close");
asm ("int____$0x80");
}
int
unlink (char const *file_name)
{
asm ("mov____0x8(%ebp),%ebx !8");
asm ("mov____$i32,%eax SYS_unlink");
asm ("int____$0x80");
}
off_t
lseek (int fd, off_t offset, int whence)
{
asm ("mov____0x8(%ebp),%ebx !8");
asm ("mov____0x8(%ebp),%ecx !12");
asm ("mov____0x8(%ebp),%edx !16");
asm ("mov____$i32,%eax SYS_lseek");
asm ("int____$0x80");
}
char *
getcwd (char *buf, size_t size)
{
asm ("mov____0x8(%ebp),%ebx !8");
asm ("mov____0x8(%ebp),%ecx !12");
asm ("mov____$i32,%eax SYS_getcwd");
asm ("int____$0x80");
}
#endif // !__GNUC__
int
dlclose (void *handle)
{
return 0;
}
void *
dlopen (char const *filename, int flags)
{
return 0;
}
int
execvp (char const *file, char *const argv[])
{
eputs ("execvp stub\n");
return 0;
}
int
fclose (FILE *stream)
{
int fd = (int)stream;
return close (fd);
}
FILE *
fdopen (int fd, char const *mode)
{
return (FILE*)fd;
}
int
ferror (FILE *stream)
{
int fd = (int)stream;
if (fd == -1) return -1;
return 0;
}
int
fflush (FILE *stream)
{
eputs ("fflush stub\n");
return 0;
}
FILE *
fopen (char const *pathname, char const *mode)
{
eputs ("fopen stub\n");
return 0;
}
int
fprintf (FILE *stream, char const *format, ...)
{
va_list ap;
va_start (ap, format);
int r = vfprintf (stream, format, ap);
va_end (ap);
return r;
}
size_t
fread (void *ptr, size_t size, size_t nmemb, FILE *stream)
{
eputs ("fread stub\n");
return 0;
}
int
fseek (FILE *stream, long offset, int whence)
{
eputs ("fseek stub\n");
return 0;
}
long
ftell (FILE *stream)
{
eputs ("ftell stub\n");
return 0;
}
size_t
fwrite (void const *ptr, size_t size, size_t nmemb, FILE *stream)
{
int fd = (int)stream;
return write (fd, ptr, size * nmemb);
}
int
gettimeofday (struct timeval *tv, struct timezone *tz)
{
return 0;
}
struct tm *
localtime (time_t const *timep)
{
eputs ("localtime stub\n");
return 0;
}
void
longjmp (jmp_buf env, int val)
{
val = val == 0 ? 1 : val;
#if __MESC__
asm ("mov____0x8(%ebp),%eax !0x0c"); // val
asm ("mov____0x8(%ebp),%ebp !0x08"); // env*
asm ("mov____0x8(%ebp),%ebx !0x4"); // env.__pc
asm ("mov____0x8(%ebp),%esp !0x8"); // env.__sp
asm ("mov____0x8(%ebp),%ebp !0x0"); // env.__bp
asm ("jmp____*%ebx");
#else
asm ("mov 0xc(%ebp),%eax\n\t" // val
"mov 0x8(%ebp),%ebp\n\t" // env*
"mov 0x4(%ebp),%ebx\n\t" // env->__pc
"mov 0x8(%ebp),%esp\n\t" // env->__sp
"mov 0x0(%ebp),%ebp\n\t" // env->__bp
"jmp *%ebx\n\t" // jmp *PC
);
#endif
// not reached
exit (42);
}
void *
memmove (void *dest, void const *src, size_t n)
{
if (dest < src)
return memcpy (dest, src, n);
char *p = dest + n;
char const *q = src +n;
while (n--)
*--p = *--q;
return dest;
}
void *
memset (void *s, int c, size_t n)
{
char *p = s;
while (n--) *p++ = c;
return s;
}
int
memcmp (void const *s1, void const *s2, size_t n)
{
char *a = s1;
char *b = s2;
while (*a == *b && --n) {a++;b++;}
return *a - *b;
}
int
mprotect (void *addr, size_t len, int prot)
{
return 0;
}
void
qsort (void *base, size_t nmemb, size_t size, int (*compar)(void const *, void const *))
{
eputs ("qsort stub\n");
}
int
remove (char const *file_name)
{
eputs ("remove stub\n");
return 0;
}
#if 0
int
setjmp_debug (jmp_buf env, int val)
{
int i;
#if 1
i = env->__bp;
i = env->__pc;
i = env->__sp;
#else
i = env[0].__bp;
i = env[0].__pc;
i = env[0].__sp;
#endif
return val == 0 ? 1 : val;
}
#endif
#if __MESC__
int
setjmp (__jmp_buf *env)
#else
int
setjmp (jmp_buf env)
#endif
{
int *p = (int*)&env;
env[0].__bp = p[-2];
env[0].__pc = p[-1];
env[0].__sp = (int)&env;
return 0;
}
int
sigaction (int signum, struct sigaction const *act, struct sigaction *oldact)
{
return 0;
}
int
sigemptyset (sigset_t *set)
{
return 0;
}
int
snprintf(char *str, size_t size, char const *format, ...)
{
va_list ap;
va_start (ap, format);
int r = vsprintf (str, format, ap);
va_end (ap);
return r;
}
int
sscanf (char const *str, const char *format, ...)
{
eputs ("sscanf stub\n");
return 0;
}
char *
strcat (char *dest, char const *src)
{
char *p = strchr (dest, '\0');
while (*src++) *p++ = *src++;
*p = 0;
return dest;
}
char *
strchr (char const *s, int c)
{
char const *p = s;
while (*p || !c)
{
if (c == *p) return p;
*p++;
}
return 0;
}
char *
strrchr (char const *s, int c)
{
int n = strlen (s);
if (!n) return 0;
char const *p = s + n - 1;
while (*p || !c)
{
if (c == *p) return p;
*p--;
}
return 0;
}
char *
strstr (char const *haystack, char const *needle)
{
eputs ("strstr stub\n");
return 0;
}
long
strtol (char const *nptr, char **endptr, int base)
{
eputs ("strtol stub\n");
if (!strncmp (nptr, "0x", 2))
{
char const *p = nptr + 2;
return _atoi (&p, 16);
}
return _atoi (&nptr, base);
}
long long int
strtoll (char const *nptr, char **endptr, int base)
{
eputs ("strtoll stub\n");
return 0;
}
unsigned long
strtoul (char const *nptr, char **endptr, int base)
{
eputs ("strtoul stub\n");
return 0;
}
unsigned long long
strtoull (char const *p, char **end, int base)
{
*end = p;
return _atoi (end, base);
}
time_t time (time_t *tloc)
{
return 0;
}
int
vsnprintf (char *str, size_t size, char const *format, va_list ap)
{
return vsprintf (str, format, ap);
}
void *
calloc (size_t nmemb, size_t size)
{
size_t count = nmemb * size;
void *p = malloc (count);
memset (p, 0, count);
return p;
}
int
vfprintf (FILE* f, char const* format, va_list ap)
{
int fd = (int)f;
char const *p = format;
while (*p)
if (*p != '%')
fputc (*p++, fd);
else
{
p++;
char c = *p;
switch (c)
{
case '%': {fputc (*p, fd); break;}
case 'c': {char c; c = va_arg (ap, char); fputc (c, fd); break;}
case 'd': {int d; d = va_arg (ap, int); fputs (itoa (d), fd); break;}
case 's': {char *s; s = va_arg (ap, char *); fputs (s, fd); break;}
default: {fputc (*p, fd); break;}
}
p++;
}
va_end (ap);
return 0;
}