GNU C Library master sources branch master updated. glibc-2.25-757-g2b4fca8

[hjl at sourceware dot org]

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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=2b4fca86d786b4a5ed4f88c571eeec7d9ff5e684

commit 2b4fca86d786b4a5ed4f88c571eeec7d9ff5e684
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Wed Jul 19 08:21:27 2017 -0700

    Don't add stack_chk_fail_local.o to libc.a [BZ #21740]
    
    commit 524a8ef2ad76af8ac049293d993a1856b0d888fb
    Author: Nick Alcock <nick.alcock@oracle.com>
    Date:   Mon Dec 26 10:08:57 2016 +0100
    
        PLT avoidance for __stack_chk_fail [BZ #7065]
    
        Add a hidden __stack_chk_fail_local alias to libc.so,
        and make sure that on targets which use __stack_chk_fail,
        this does not introduce a local PLT reference into libc.so.
    
    which unconditionally added
    
    strong_alias (__stack_chk_fail, __stack_chk_fail_local)
    
    defines __stack_chk_fail_local as an alias of __stack_chk_fail in libc.a.
    There is no need to add stack_chk_fail_local.o to libc.a.  We only need
    to add stack_chk_fail_local.oS to libc_nonshared.a.
    
    Tested on x86-64:
    
    [hjl@gnu-skl-1 build-x86_64-linux]$ nm libc.a | grep __stack_chk_fail
    0000000000000000 T __stack_chk_fail
    0000000000000000 T __stack_chk_fail_local
    [hjl@gnu-skl-1 build-x86_64-linux]$ nm libc_nonshared.a | grep __stack_chk_fail_local
    0000000000000000 T __stack_chk_fail_local
    [hjl@gnu-skl-1 build-x86_64-linux]$
    
    	[BZ #21740]
    	* debug/Makefile (elide-routines.o): New.

diff --git a/ChangeLog b/ChangeLog
index 3cf8d4a..b9dc705 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2017-07-19  H.J. Lu  <hongjiu.lu@intel.com>
+
+	[BZ #21740]
+	* debug/Makefile (elide-routines.o): New.
+
 2017-07-19  Szabolcs Nagy  <szabolcs.nagy@arm.com>
 
 	* sysdeps/unix/sysv/linux/aarch64/dl-procinfo.c:
diff --git a/debug/Makefile b/debug/Makefile
index ce5fa88..504bf87 100644
--- a/debug/Makefile
+++ b/debug/Makefile
@@ -53,6 +53,10 @@ routines  = backtrace backtracesyms backtracesymsfd noophooks \
 	    $(static-only-routines)
 static-only-routines := warning-nop stack_chk_fail_local
 
+# Don't add stack_chk_fail_local.o to libc.a since __stack_chk_fail_local
+# is an alias of __stack_chk_fail in stack_chk_fail.o.
+elide-routines.o := stack_chk_fail_local
+
 # Building the stack-protector failure routines with stack protection
 # makes no sense.
 

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog      |    5 +++++
 debug/Makefile |    4 ++++
 2 files changed, 9 insertions(+), 0 deletions(-)


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