From: Stefan Jumarea <stefanjumarea02@gmail.com>
Date: Wed, 31 May 2023 17:14:41 +0000 (+0300)
Subject: glue: Init libc.auxv to point to a zero value
X-Git-Tag: RELEASE-0.14.0~16
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=7dcb5a02f61b0e3b1d5000ea28184ede928ded3a;p=unikraft%2Flibs%2Fmusl.git

glue: Init libc.auxv to point to a zero value

The `libc.auxv` is not supposed to be 0, since it will be dereferenced
by any call to `getauxval`. It should point to a 0 value instead.

Signed-off-by: Stefan Jumarea <stefanjumarea02@gmail.com>
Reviewed-by: Marco Schlumpp <marco@unikraft.io>
Approved-by: Razvan Deaconescu <razvand@unikraft.io>
Tested-by: Unikraft CI <monkey@unikraft.io>
GitHub-Closes: #53
---

diff --git a/__uk_init_tls.c b/__uk_init_tls.c
index 68e0fc5..5f4f2c6 100644
--- a/__uk_init_tls.c
+++ b/__uk_init_tls.c
@@ -159,9 +159,12 @@ static void __uk_init_tls(void *tls_area)
 		UK_CRASH("Failed to initialize the main thread\n");
 }
 
+/* We initialize the auxiliary vector to point to a zero value */
+static size_t __libc_auxv[1] = { 0 };
+
 static void __uk_init_libc(void)
 {
-	libc.auxv = 0;
+	libc.auxv = __libc_auxv;
 	__hwcap = 0;
 	__sysinfo = 0;
 	libc.page_size = __PAGE_SIZE;