1#define _GNU_SOURCE 2#include <unistd.h> 3#include <sys/mman.h> 4#include <errno.h> 5#include <stdint.h> 6#include <stdarg.h> 7#include "syscall.h" 8#include "libc.h" 9 10static void dummy(void) { } 11weak_alias(dummy, __vm_wait); 12 13void *__mremap(void *old_addr, size_t old_len, size_t new_len, int flags, ...) 14{ 15 va_list ap; 16 void *new_addr = 0; 17 18 if (new_len >= PTRDIFF_MAX) { 19 errno = ENOMEM; 20 return MAP_FAILED; 21 } 22 23 if (flags & MREMAP_FIXED) { 24 __vm_wait(); 25 va_start(ap, flags); 26 new_addr = va_arg(ap, void *); 27 va_end(ap); 28 } 29 30 return (void *)syscall(SYS_mremap, old_addr, old_len, new_len, flags, new_addr); 31} 32 33weak_alias(__mremap, mremap); 34