From: GNU Libc Maintainers <debian-glibc@lists.debian.org>
Date: Tue, 4 Sep 2018 19:13:02 +0000 (+0100)
Subject: submitted-start-cfi
X-Git-Tag: archive/raspbian/2.27-6+rpi1^2~39
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=d83eaf7c3b9f4c0e58ab358786be106ce36da252;p=glibc.git

submitted-start-cfi

2018-05-18  Palmer Dabbelt  <palmer@sifive.com>

        PR 23125
        * sysdeps/riscv/start.S (ENTRY_POINT): Mark ra as undefined so
        backtraces can terminate if they reach this point.


Gbp-Pq: Topic riscv64
Gbp-Pq: Name submitted-start-cfi.diff
---

diff --git a/sysdeps/riscv/start.S b/sysdeps/riscv/start.S
index 4635ddb5e..93a80bc4a 100644
--- a/sysdeps/riscv/start.S
+++ b/sysdeps/riscv/start.S
@@ -43,6 +43,8 @@
    __libc_start_main wants this in a5.  */
 
 ENTRY (ENTRY_POINT)
+	/* Mark ra as undefined in order to stop unwinding here!  */
+	cfi_undefined (ra)
 	call  .Lload_gp
 	mv    a5, a0  /* rtld_fini.  */
 	/* main may be in a shared library.  */