linux-syscalls1.c from Gdb at Krugle
Show linux-syscalls1.c syntax highlighted
/** 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);
}
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