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Diffstat (limited to 'src/mman/mremap.c')
-rw-r--r--src/mman/mremap.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/src/mman/mremap.c b/src/mman/mremap.c
index 1096ace1..ce4e8ea1 100644
--- a/src/mman/mremap.c
+++ b/src/mman/mremap.c
@@ -1,3 +1,4 @@
+#define _GNU_SOURCE
#include <unistd.h>
#include <sys/mman.h>
#include <errno.h>
@@ -6,19 +7,25 @@
#include "syscall.h"
#include "libc.h"
+static void dummy(void) { }
+weak_alias(dummy, __vm_wait);
+
void *__mremap(void *old_addr, size_t old_len, size_t new_len, int flags, ...)
{
va_list ap;
- void *new_addr;
+ void *new_addr = 0;
if (new_len >= PTRDIFF_MAX) {
errno = ENOMEM;
return MAP_FAILED;
}
- va_start(ap, flags);
- new_addr = va_arg(ap, void *);
- va_end(ap);
+ if (flags & MREMAP_FIXED) {
+ __vm_wait();
+ va_start(ap, flags);
+ new_addr = va_arg(ap, void *);
+ va_end(ap);
+ }
return (void *)syscall(SYS_mremap, old_addr, old_len, new_len, flags, new_addr);
}