X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fmman%2Fmprotect.c;h=5ab2d8b0278896ace8109eed8251a3e72abe8c47;hb=6688a778b0419eab32e715f269319248edee9da5;hp=1db2aea2f127afeab663822b839981a36e9220f1;hpb=aa398f56fa398f2202b04e82c67f822f3233786f;p=musl

diff --git a/src/mman/mprotect.c b/src/mman/mprotect.c
index 1db2aea2..5ab2d8b0 100644
--- a/src/mman/mprotect.c
+++ b/src/mman/mprotect.c
@@ -1,7 +1,11 @@
 #include <sys/mman.h>
+#include <limits.h>
 #include "syscall.h"
 
 int mprotect(void *addr, size_t len, int prot)
 {
-	return syscall(SYS_mprotect, addr, len, prot);
+	size_t start, end;
+	start = (size_t)addr & -PAGE_SIZE;
+	end = (size_t)((char *)addr + len + PAGE_SIZE-1) & -PAGE_SIZE;
+	return syscall(SYS_mprotect, start, end-start, prot);
 }