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Support compilers defaulting to PIE
To support building glibc with GCC 6 configured with --enable-default-pie, which generates PIE by default, we need to build programs as PIE. But elf/tst-dlopen-aout must not be built as PIE since it tests dlopen on ET_EXEC file and PIE is ET_DYN. [BZ #17841] * Makeconfig (no-pie-ldflag): New. (+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. * elf/Makefile (LDFLAGS-tst-dlopen-aout): New.
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12
ChangeLog
12
ChangeLog
@ -1,3 +1,15 @@
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2015-06-25 H.J. Lu <hongjiu.lu@intel.com>
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[BZ #17841]
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* Makeconfig (no-pie-ldflag): New.
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(+link): Set to $(+link-pie) if default to PIE.
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(+link-tests): Set to $(+link-pie-tests) if default to PIE.
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* config.make.in (build-pie-default): New.
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* configure.ac (libc_cv_pie_default): New. Set to yes if -fPIE
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is default. AC_SUBST.
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* configure: Regenerated.
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* elf/Makefile (LDFLAGS-tst-dlopen-aout): New.
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2015-06-24 Roland McGrath <roland@hack.frob.com>
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* nptl/descr.h (struct pthread): Change type of field setxid_futex
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@ -442,6 +442,11 @@ endif
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# Commands for linking programs with the C library.
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ifndef +link
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ifeq (yes,$(build-shared))
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ifeq (yes,$(build-pie-default))
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no-pie-ldflag = -no-pie
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+link = $(+link-pie)
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+link-tests = $(+link-pie-tests)
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else
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+link-before-libc = $(CC) -nostdlib -nostartfiles -o $@ \
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$(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
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$(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
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@ -462,6 +467,7 @@ $(+link-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
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$(+link-after-libc)
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$(call after-link,$@)
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endef
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endif
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else
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+link = $(+link-static)
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+link-tests = $(+link-static-tests)
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22
NEWS
22
NEWS
@ -14,17 +14,17 @@ Version 2.22
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16526, 16538, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269,
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17293, 17322, 17403, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
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17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17836,
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17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965, 17967, 17969,
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17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007, 18019, 18020,
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18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042, 18043, 18046,
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18047, 18049, 18068, 18080, 18093, 18100, 18104, 18110, 18111, 18116,
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18125, 18128, 18138, 18185, 18196, 18197, 18206, 18210, 18211, 18217,
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18219, 18220, 18221, 18234, 18244, 18245, 18247, 18287, 18319, 18324,
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18333, 18346, 18371, 18397, 18409, 18410, 18412, 18418, 18422, 18434,
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18444, 18468, 18469, 18470, 18479, 18483, 18495, 18496, 18497, 18498,
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18507, 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530,
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18532, 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546,
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18547, 18553, 18558, 18569, 18583, 18585, 18586, 18593, 18594.
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17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965, 17967,
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17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007, 18019,
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18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042, 18043,
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18046, 18047, 18049, 18068, 18080, 18093, 18100, 18104, 18110, 18111,
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18116, 18125, 18128, 18138, 18185, 18196, 18197, 18206, 18210, 18211,
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18217, 18219, 18220, 18221, 18234, 18244, 18245, 18247, 18287, 18319,
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18324, 18333, 18346, 18371, 18397, 18409, 18410, 18412, 18418, 18422,
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18434, 18444, 18468, 18469, 18470, 18479, 18483, 18495, 18496, 18497,
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18498, 18507, 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529,
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18530, 18532, 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545,
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18546, 18547, 18553, 18558, 18569, 18583, 18585, 18586, 18593, 18594.
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* Cache information can be queried via sysconf() function on s390 e.g. with
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_SC_LEVEL1_ICACHE_SIZE as argument.
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@ -82,6 +82,7 @@ nss-crypt = @libc_cv_nss_crypt@
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# Configuration options.
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build-shared = @shared@
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build-pic-default= @libc_cv_pic_default@
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build-pie-default= @libc_cv_pie_default@
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build-profile = @profile@
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build-static-nss = @static_nss@
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add-ons = @add_ons@
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21
configure
vendored
21
configure
vendored
@ -596,6 +596,7 @@ mach_interface_list
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DEFINES
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static_nss
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profile
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libc_cv_pie_default
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libc_cv_pic_default
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shared
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static
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@ -7317,6 +7318,26 @@ fi
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$as_echo "$libc_cv_pic_default" >&6; }
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether -fPIE is default" >&5
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$as_echo_n "checking whether -fPIE is default... " >&6; }
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if ${libc_cv_pie_default+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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libc_cv_pie_default=yes
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cat > conftest.c <<EOF
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#if defined __PIE__ || defined __pie__ || defined PIE || defined pie
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# error PIE is default.
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#endif
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EOF
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if eval "${CC-cc} -S conftest.c 2>&5 1>&5"; then
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libc_cv_pie_default=no
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fi
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rm -f conftest.*
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_pie_default" >&5
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$as_echo "$libc_cv_pie_default" >&6; }
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13
configure.ac
13
configure.ac
@ -2075,6 +2075,19 @@ fi
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rm -f conftest.*])
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AC_SUBST(libc_cv_pic_default)
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AC_CACHE_CHECK([whether -fPIE is default], libc_cv_pie_default,
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[libc_cv_pie_default=yes
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cat > conftest.c <<EOF
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#if defined __PIE__ || defined __pie__ || defined PIE || defined pie
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# error PIE is default.
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#endif
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EOF
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if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
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libc_cv_pie_default=no
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fi
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rm -f conftest.*])
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AC_SUBST(libc_cv_pie_default)
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AC_SUBST(profile)
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AC_SUBST(static_nss)
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@ -151,6 +151,7 @@ tests += loadtest restest1 preloadtest loadfail multiload origtest resolvfail \
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# reldep9
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ifeq ($(build-hardcoded-path-in-tests),yes)
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tests += tst-dlopen-aout
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LDFLAGS-tst-dlopen-aout = $(no-pie-ldflag)
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endif
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test-srcs = tst-pathopt
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selinux-enabled := $(shell cat /selinux/enforce 2> /dev/null)
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