From 67c0579669ba1fc265d770252fab31babf887329 Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Fri, 8 Jun 2018 10:28:38 -0700
Subject: Mark _init and _fini as hidden [BZ #23145]

_init and _fini are special functions provided by glibc for linker to
define DT_INIT and DT_FINI in executable and shared library.  They
should never be put in dynamic symbol table.  This patch marks them as
hidden to remove them from dynamic symbol table.

Tested with build-many-glibcs.py.

	[BZ #23145]
	* elf/Makefile (tests-special): Add $(objpfx)check-initfini.out.
	($(all-built-dso:=.dynsym): New target.
	(common-generated): Add $(all-built-dso:$(common-objpfx)%=%.dynsym).
	($(objpfx)check-initfini.out): New target.
	(generated): Add check-initfini.out.
	* scripts/check-initfini.awk: New file.
	* sysdeps/aarch64/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/alpha/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/arm/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/hppa/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/i386/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/ia64/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/m68k/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/microblaze/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/mips/mips32/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/mips/mips64/n32/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/mips/mips64/n64/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/nios2/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/powerpc/powerpc32/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/powerpc/powerpc64/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/s390/s390-32/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/s390/s390-64/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/sh/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/sparc/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/x86_64/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
---
 sysdeps/x86_64/crti.S | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'sysdeps/x86_64/crti.S')

diff --git a/sysdeps/x86_64/crti.S b/sysdeps/x86_64/crti.S
index 619effac3a..f26915e956 100644
--- a/sysdeps/x86_64/crti.S
+++ b/sysdeps/x86_64/crti.S
@@ -58,6 +58,7 @@
 	.section .init,"ax",@progbits
 	.p2align 2
 	.globl _init
+	.hidden	_init
 	.type _init, @function
 _init:
 	/* Maintain 16-byte stack alignment for called functions.  */
@@ -75,6 +76,7 @@ _init:
 	.section .fini,"ax",@progbits
 	.p2align 2
 	.globl _fini
+	.hidden	_fini
 	.type _fini, @function
 _fini:
 	subq $8, %rsp
-- 
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