zig

commit 9e019ed26bf2ab46040099dadaf778dec436bc4a (tree)
parent c7a37967340da7e21281fca09e82f8fffb3f15d8
Author: Timon Kruiper <timonkruiper@gmail.com>
Date:   Tue, 31 Mar 2020 20:15:09 +0200

Fix possible unaligned ptr from `getauxval`

This caused SIGILL on armv7a-linux

Diffstat:
M
src/os.cpp
 | 
5
++++-

1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/src/os.cpp b/src/os.cpp
@@ -1456,7 +1456,10 @@ static void init_rand() {
     memcpy(&seed, bytes, sizeof(unsigned));
     srand(seed);
 #elif defined(ZIG_OS_LINUX)
-    srand(*((unsigned*)getauxval(AT_RANDOM)));
+    unsigned char *ptr_random = (unsigned char*)getauxval(AT_RANDOM);
+    unsigned seed;
+    memcpy(&seed, ptr_random, sizeof(seed));
+    srand(seed);
 #else
     int fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC);
     if (fd == -1) {