Subversion Repositories openrisc_2011-10-31

/** Linux system call interface.

 * Written by Shaun Jackman <sjackman@gmail.com>.

 * Copyright 2006 Pathway Connectivity

 *

 * Permission to use, copy, modify, and distribute this software

 * is freely granted, provided that this notice is preserved.

 */

#include <errno.h>

#include <stdint.h>

extern char _end[];

static void *curbrk = _end;

extern void *_brk(void *addr);

int brk(void *addr)

{

        void *newbrk;

        if (curbrk == addr)

                return 0;

        newbrk = _brk(addr);

        curbrk = newbrk;

        if (newbrk < addr) {

                errno = ENOMEM;

                return -1;

        }

        return 0;

}

void *_sbrk(intptr_t incr)

{

        void *oldbrk = curbrk;

        if (brk(oldbrk + incr) == -1)

                return (void *)-1;

        return oldbrk;

}

void *sbrk(intptr_t incr) __attribute__((alias("_sbrk")));

int _set_errno(int n)

{

        if (n < 0) {

                errno = -n;

                return -1;

        }

        return n;

}

#include <sys/wait.h>

struct rusage;

pid_t wait4(pid_t pid, int *status, int options, struct rusage *rusage);

pid_t _wait(int *status)

{

        return wait4(-1, status, 0, NULL);

}

pid_t waitpid(pid_t pid, int *status, int options)

{

        return wait4(pid, status, options, NULL);

}

extern int _reboot(int magic, int magic2, int flag, void *arg);

int reboot(int flag)

{

        return _reboot(0xfee1dead, 0x28121969, flag, NULL);

}