Skip to content

Commit

Permalink
binutils: 2.28 -> 2.29
Browse files Browse the repository at this point in the history
Binutils 2.29 no longer allows .semver symbols, which is why
we need to patch glibc to avoid them
  • Loading branch information
NeQuissimus committed Jul 29, 2017
1 parent b2608b8 commit 733e20f
Show file tree
Hide file tree
Showing 3 changed files with 70 additions and 2 deletions.
65 changes: 65 additions & 0 deletions pkgs/development/libraries/glibc/avoid-semver-on-common.patch
Original file line number Diff line number Diff line change
@@ -0,0 +1,65 @@
From 0edeadc0d396aa713b808ae50a0058aca5d3837e Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <[email protected]>
Date: Wed, 26 Jul 2017 10:08:46 -0700
Subject: [PATCH] Avoid .symver on common symbols [BZ #21666]

The .symver directive on common symbol just creates a new common symbol,
not an alias and the newer assembler with the bug fix for

https://sourceware.org/bugzilla/show_bug.cgi?id=21661

will issue an error. Before the fix, we got

$ readelf -sW libc.so | grep "loc[12s]"
5109: 00000000003a0608 8 OBJECT LOCAL DEFAULT 36 loc1
5188: 00000000003a0610 8 OBJECT LOCAL DEFAULT 36 loc2
5455: 00000000003a0618 8 OBJECT LOCAL DEFAULT 36 locs
6575: 00000000003a05f0 8 OBJECT GLOBAL DEFAULT 36 locs@GLIBC_2.2.5
7156: 00000000003a05f8 8 OBJECT GLOBAL DEFAULT 36 loc1@GLIBC_2.2.5
7312: 00000000003a0600 8 OBJECT GLOBAL DEFAULT 36 loc2@GLIBC_2.2.5

in libc.so. The versioned loc1, loc2 and locs have the wrong addresses.
After the fix, we got

$ readelf -sW libc.so | grep "loc[12s]"
6570: 000000000039e3b8 8 OBJECT GLOBAL DEFAULT 34 locs@GLIBC_2.2.5
7151: 000000000039e3c8 8 OBJECT GLOBAL DEFAULT 34 loc1@GLIBC_2.2.5
7307: 000000000039e3c0 8 OBJECT GLOBAL DEFAULT 34 loc2@GLIBC_2.2.5

[BZ #21666]
* misc/regexp.c (loc1): Add __attribute__ ((nocommon));
(loc2): Likewise.
(locs): Likewise.

(cherry picked from commit 388b4f1a02f3a801965028bbfcd48d905638b797)
---
ChangeLog | 7 +++++++
misc/regexp.c | 9 +++++----
2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/misc/regexp.c b/misc/regexp.c
index 19d76c0..eaea7c3 100644
--- a/misc/regexp.c
+++ b/misc/regexp.c
@@ -29,14 +29,15 @@

#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_23)

-/* Define the variables used for the interface. */
-char *loc1;
-char *loc2;
+/* Define the variables used for the interface. Avoid .symver on common
+ symbol, which just creates a new common symbol, not an alias. */
+char *loc1 __attribute__ ((nocommon));
+char *loc2 __attribute__ ((nocommon));
compat_symbol (libc, loc1, loc1, GLIBC_2_0);
compat_symbol (libc, loc2, loc2, GLIBC_2_0);

/* Although we do not support the use we define this variable as well. */
-char *locs;
+char *locs __attribute__ ((nocommon));
compat_symbol (libc, locs, locs, GLIBC_2_0);


--
2.9.3
3 changes: 3 additions & 0 deletions pkgs/development/libraries/glibc/common.nix
Original file line number Diff line number Diff line change
Expand Up @@ -64,6 +64,9 @@ stdenv.mkDerivation ({
./CVE-2017-1000366-rtld-LD_LIBRARY_PATH.patch
./CVE-2017-1000366-rtld-LD_PRELOAD.patch
./CVE-2017-1000366-rtld-LD_AUDIT.patch

/* https://sourceware.org/bugzilla/show_bug.cgi?id=21666 */
./avoid-semver-on-common.patch
]
++ lib.optionals stdenv.isi686 [
./fix-i686-memchr.patch
Expand Down
4 changes: 2 additions & 2 deletions pkgs/development/tools/misc/binutils/default.nix
Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@
}:

let
version = "2.28";
version = "2.29";
basename = "binutils-${version}";
inherit (stdenv.lib) optional optionals optionalString;
# The prefix prepended to binary names to allow multiple binuntils on the
Expand All @@ -18,7 +18,7 @@ stdenv.mkDerivation rec {

src = fetchurl {
url = "mirror://gnu/binutils/${basename}.tar.bz2";
sha256 = "0wiasgns7i8km8nrxas265sh2dfpsw93b3qw195ipc90w4z475v2";
sha256 = "1gqfyksdnj3iir5gzyvlp785mnk60g1pll6zbzbslfchhr4rb8i9";
};

patches = [
Expand Down

0 comments on commit 733e20f

Please sign in to comment.