GNU C Library master sources branch hjl/pr17711 created. glibc-2.20-578-ga29c406

[hjl at sourceware dot org]

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        at  a29c4064115e59bcf8c001c0b3dedfa8d49d3653 (commit)

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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=a29c4064115e59bcf8c001c0b3dedfa8d49d3653

commit a29c4064115e59bcf8c001c0b3dedfa8d49d3653
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Wed Jan 14 06:29:04 2015 -0800

    Support compilers defaulting to PIE
    
    If PIE is the default, we need to build programs as PIE.
    
    	* Makeconfig (+link): Set to $(+link-pie) if default to PIE.
    	(+link-tests): Set to $(+link-pie-tests) if default to PIE.
    	* config.make.in (build-pie-default): New.
    	* configure.ac (libc_cv_pie_default): New.  Set to yes if -fPIE
    	is default.  AC_SUBST.
    	* configure: Regenerated.

diff --git a/Makeconfig b/Makeconfig
index 751e9ff..9bd0db3 100644
--- a/Makeconfig
+++ b/Makeconfig
@@ -425,6 +425,10 @@ endif
 # Commands for linking programs with the C library.
 ifndef +link
 ifeq (yes,$(build-shared))
+ifeq (yes,$(build-pie-default))
++link = $(+link-pie)
++link-tests = $(+link-pie-tests)
+else
 +link-before-libc = $(CC) -nostdlib -nostartfiles -o $@ \
 	      $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
 	      $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
@@ -440,6 +444,7 @@ ifeq (yes,$(build-shared))
 	$(+link-after-libc)
 +link-tests = $(+link-before-libc) $(rtld-tests-LDFLAGS) \
 	      $(link-libc-tests) $(+link-after-libc)
+endif
 else
 +link = $(+link-static)
 +link-tests = $(+link-static-tests)
diff --git a/config.make.in b/config.make.in
index ad4dd30..635932f 100644
--- a/config.make.in
+++ b/config.make.in
@@ -81,6 +81,7 @@ nss-crypt = @libc_cv_nss_crypt@
 # Configuration options.
 build-shared = @shared@
 build-pic-default= @libc_cv_pic_default@
+build-pie-default= @libc_cv_pie_default@
 build-profile = @profile@
 build-static-nss = @static_nss@
 add-ons = @add_ons@
diff --git a/configure b/configure
index ce0c6a0..3f5d207 100755
--- a/configure
+++ b/configure
@@ -596,6 +596,7 @@ mach_interface_list
 DEFINES
 static_nss
 profile
+libc_cv_pie_default
 libc_cv_pic_default
 shared
 static
@@ -7157,6 +7158,26 @@ fi
 $as_echo "$libc_cv_pic_default" >&6; }
 
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether -fPIE is default" >&5
+$as_echo_n "checking whether -fPIE is default... " >&6; }
+if ${libc_cv_pie_default+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  libc_cv_pie_default=yes
+cat > conftest.c <<EOF
+#if defined __PIE__ || defined __pie__ || defined PIE || defined pie
+# error PIE is default.
+#endif
+EOF
+if eval "${CC-cc} -S conftest.c 2>&5 1>&5"; then
+  libc_cv_pie_default=no
+fi
+rm -f conftest.*
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_pie_default" >&5
+$as_echo "$libc_cv_pie_default" >&6; }
+
+
 
 
 
diff --git a/configure.ac b/configure.ac
index d89aaf0..cb37a83 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2019,6 +2019,19 @@ fi
 rm -f conftest.*])
 AC_SUBST(libc_cv_pic_default)
 
+AC_CACHE_CHECK([whether -fPIE is default], libc_cv_pie_default,
+[libc_cv_pie_default=yes
+cat > conftest.c <<EOF
+#if defined __PIE__ || defined __pie__ || defined PIE || defined pie
+# error PIE is default.
+#endif
+EOF
+if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
+  libc_cv_pie_default=no
+fi
+rm -f conftest.*])
+AC_SUBST(libc_cv_pie_default)
+
 AC_SUBST(profile)
 AC_SUBST(static_nss)
 

http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=f0b03bc24b54927677af56778309b6d58aac5eb4

commit f0b03bc24b54927677af56778309b6d58aac5eb4
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Tue Jan 13 06:19:44 2015 -0800

    Compile gcrt1.o with -fPIC
    
    We compile gcrt1.o with -fPIC to support both "gcc -pg" and "gcc -pie -pg".
    
    	[BZ #17836]
    	* csu/Makefile (extra-objs): Add gmon-start.o if not builing
    	shared library.  Add gmon-start.os otherwise.
    	($(objpfx)g$(start-installed-name)): Use $(objpfx)S%
    	$(objpfx)gmon-start.os if builing shared library.
    	($(objpfx)g$(static-start-installed-name)): Likewise.

diff --git a/csu/Makefile b/csu/Makefile
index f7cf4af..9f0855a 100644
--- a/csu/Makefile
+++ b/csu/Makefile
@@ -32,7 +32,7 @@ aux	 = errno
 elide-routines.os = libc-tls
 static-only-routines = elf-init
 csu-dummies = $(filter-out $(start-installed-name),crt1.o Mcrt1.o)
-extra-objs = start.o gmon-start.o \
+extra-objs = start.o \
 	     $(start-installed-name) g$(start-installed-name) $(csu-dummies) \
 	     S$(start-installed-name)
 omit-deps = $(patsubst %.o,%,$(start-installed-name) g$(start-installed-name) \
@@ -46,9 +46,11 @@ tests := tst-empty tst-atomic tst-atomic-long
 tests-static := tst-empty
 
 ifeq (yes,$(build-shared))
-extra-objs += S$(start-installed-name)
+extra-objs += S$(start-installed-name) gmon-start.os
 install-lib += S$(start-installed-name)
 generated += start.os
+else
+extra-objs += gmon-start.o
 endif
 
 ifneq ($(start-installed-name),$(static-start-installed-name))
@@ -95,10 +97,17 @@ endif
 # The profiling startfile is made by linking together the normal
 # startfile with gmon-start.o, which defines a constructor function
 # to turn on profiling code at startup.
+ifeq (yes,$(build-shared))
+$(addprefix $(objpfx),$(sort g$(start-installed-name) \
+			     g$(static-start-installed-name))): \
+  $(objpfx)g%: $(objpfx)S% $(objpfx)gmon-start.os
+	$(link-relocatable)
+else
 $(addprefix $(objpfx),$(sort g$(start-installed-name) \
 			     g$(static-start-installed-name))): \
   $(objpfx)g%: $(objpfx)% $(objpfx)gmon-start.o
 	$(link-relocatable)
+endif
 
 # These extra files are sometimes expected by system standard linking
 # procedures, but we have nothing for them to do.  So compile empty files.

http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=ccf880ba92fe1ef7f29f17062ba6aa2aa7b52f50

commit ccf880ba92fe1ef7f29f17062ba6aa2aa7b52f50
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Fri Dec 19 06:30:31 2014 -0800

    Compile vismain with -fPIC and link with -pie

diff --git a/elf/Makefile b/elf/Makefile
index e5b142c..02ab9d9 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 = $(pic-ccflag)
 endif
 modules-execstack-yes = tst-execstack-mod
 extra-test-objs += $(addsuffix .os,$(strip $(modules-names)))

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