HeckSTM32F4Playground/src/syscalls.c

#include <sys/stat.h>
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
#include <signal.h>
#include <time.h>
#include <sys/time.h>
#include <sys/times.h>


extern int __io_putchar(int ch) __attribute__((weak));

extern int __io_getchar(void) __attribute__((weak));

char *__env[1] = { 0 };
char **environ = __env;


void initialise_monitor_handles() {}

int _getpid(void)
{
    return 1;
}

int _kill(int pid, int sig)
{
    (void)pid;
    (void)sig;
    errno = EINVAL;
    return -1;
}

void _exit(int status)
{
    _kill(status, -1);
    while (1) {} /* Make sure we hang here */
}

__attribute__((weak)) int _read(int file, char *ptr, int len)
{
    (void)file;
    int DataIdx;

    for (DataIdx = 0; DataIdx < len; DataIdx++) {
        *ptr++ = __io_getchar();
    }

    return len;
}

__attribute__((weak)) int _write(int file, char *ptr, int len)
{
    (void)file;
    int DataIdx;

    for (DataIdx = 0; DataIdx < len; DataIdx++) {
        __io_putchar(*ptr++);
    }
    return len;
}

int _close(int file)
{
    (void)file;
    return -1;
}


int _fstat(int file, struct stat *st)
{
    (void)file;
    st->st_mode = S_IFCHR;
    return 0;
}

int _isatty(int file)
{
    (void)file;
    return 1;
}

int _lseek(int file, int ptr, int dir)
{
    (void)file;
    (void)ptr;
    (void)dir;
    return 0;
}

int _open(char *path, int flags, ...)
{
    (void)path;
    (void)flags;
    /* Pretend like we always fail */
    return -1;
}

int _wait(int *status)
{
    (void)status;
    errno = ECHILD;
    return -1;
}

int _unlink(char *name)
{
    (void)name;
    errno = ENOENT;
    return -1;
}

int _times(struct tms *buf)
{
    (void)buf;
    return -1;
}

int _stat(char *file, struct stat *st)
{
    (void)file;
    st->st_mode = S_IFCHR;
    return 0;
}

int _link(char *old, char *new)
{
    (void)old;
    (void)new;
    errno = EMLINK;
    return -1;
}

int _fork(void)
{
    errno = EAGAIN;
    return -1;
}

int _execve(char *name, char **argv, char **env)
{
    (void)name;
    (void)argv;
    (void)env;
    errno = ENOMEM;
    return -1;
}