stub.c
1.49 KB
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/* stub with functions replacing some system calling */
//#include <stdio.h>
#include "my_printf.h"
//struct _IO_FILE {
// int dumb;
//};
FILE *stderr = NULL;
FILE *stdout = NULL;
int errno = 0;
typedef void (*sighandler_t)(int);
sighandler_t signal(int signum, sighandler_t handler)
{
return handler;
}
void exit(int status)
{
(void) status;
asm("mov %psr,%g1");
asm("sub %g0,33,%g2");
asm("and %g1,%g2,%g1");
asm("mov %g1,%psr");
asm("nop");
asm("ta 0");
asm("nop");
asm("nop");
asm("nop");
while(1) ;
}
int fputs(const char *s, FILE *stream)
{
printf_(s);
return 0;
}
int puts(const char *s)
{
printf_(s);
return 0;
}
int fputc(int c, FILE *stream)
{
printf_("%c",c);
return c;
}
int putc(int c, FILE *stream)
{
printf_("%c",c);
return c;
}
int fflush(FILE *stream)
{
return 0;
}
int my_vfprintf(FILE *stream, const char *format, ...);
#undef fprintf
int fprintf(FILE *stream, const char *format, ...)
{
va_list arg;
int length;
va_start(arg, format);
length = my_vfprintf(stream, format, arg);
va_end(arg);
return length;
}
#undef printf
int printf(const char *format, ...)
{
va_list arg;
int length;
va_start(arg, format);
length = my_vfprintf(stdout, format, arg);
va_end(arg);
return length;
}
int vfprintf(FILE *stream, const char *format, va_list ap)
{
return my_vfprintf(stream, format, ap);
}
size_t fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
{
// TODO ... for -O3 fputs is sometimes replaced by fwrite
}