| 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 | |
| 9 | static void dummy(void) { } |
| 10 | weak_alias(dummy, __vm_wait); |
| 11 | |
| 12 | void *__mremap(void *old_addr, size_t old_len, size_t new_len, int flags, ...) |
| 13 | { |
| 14 | va_list ap; |
| 15 | void *new_addr = 0; |
| 16 | |
| 17 | if (new_len >= PTRDIFF_MAX) { |
| 18 | errno = ENOMEM; |
| 19 | return MAP_FAILED; |
| 20 | } |
| 21 | |
| 22 | if (flags & MREMAP_FIXED) { |
| 23 | __vm_wait(); |
| 24 | va_start(ap, flags); |
| 25 | new_addr = va_arg(ap, void *); |
| 26 | va_end(ap); |
| 27 | } |
| 28 | |
| 29 | return (void *)syscall(SYS_mremap, old_addr, old_len, new_len, flags, new_addr); |
| 30 | } |
| 31 | |
| 32 | weak_alias(__mremap, mremap); |