From ef4ad06fe5a615af9550d74b1b6d546b9dc0a64d Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Fri, 27 Feb 2015 13:56:44 -0800 Subject: Compile vismain with -fPIE and link with -pie Protocted symbol in shared library can only be accessed from PIE or shared library. Linker in binutils 2.26 enforces it. We must compile vismain with -fPIE and link it with -pie. [BZ #17711] * elf/Makefile (tests): Add vismain only if PIE is enabled. (tests-pie): Add vismain. (CFLAGS-vismain.c): New. * elf/vismain.c: Add comments for PIE requirement. --- elf/Makefile | 5 ++++- elf/vismain.c | 5 +++++ 2 files changed, 9 insertions(+), 1 deletion(-) (limited to 'elf') diff --git a/elf/Makefile b/elf/Makefile index f78642ed09..20b1682370 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -130,7 +130,7 @@ endif tests += $(tests-static) ifeq (yes,$(build-shared)) tests += loadtest restest1 preloadtest loadfail multiload origtest resolvfail \ - constload1 order vismain noload filter unload \ + constload1 order noload filter unload \ reldep reldep2 reldep3 reldep4 nodelete nodelete2 \ nodlopen nodlopen2 neededtest neededtest2 \ neededtest3 neededtest4 unload2 lateglobal initfirst global \ @@ -218,6 +218,9 @@ ifeq (yesyes,$(have-fpie)$(build-shared)) modules-names += tst-piemod1 tests += tst-pie1 tst-pie2 tests-pie += tst-pie1 tst-pie2 +tests += vismain +tests-pie += vismain +CFLAGS-vismain.c = $(PIE-ccflag) endif modules-execstack-yes = tst-execstack-mod extra-test-objs += $(addsuffix .os,$(strip $(modules-names))) diff --git a/elf/vismain.c b/elf/vismain.c index dfcaeebc7f..05b374812c 100644 --- a/elf/vismain.c +++ b/elf/vismain.c @@ -15,6 +15,11 @@ License along with the GNU C Library; if not, see . */ +/* This file must be compiled as PIE to avoid copy relocation when + accessing protected symbols defined in shared libaries since copy + relocation doesn't work with protected symbols and linker in + binutils 2.26 enforces this rule. */ + #include #include #include -- cgit v1.2.3