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commit ac63a0783cdee8454c84fc45f37330d98b6039e7
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Author: Dmitry V. Levin <ldv@altlinux.org>
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Date: Fri Jun 5 22:20:13 2015 +0000
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Prepare for restoration of .interp section in libpthread.so
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Make runtime-linker.h available outside $(elf-objpfx) by moving
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the file to $(common-objpfx) and the rules for it to Makerules.
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Tested for x86_64 and x86 (testsuite, and that no compiled code
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changed by the patch).
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* Makeconfig (+interp): Remove unused variable.
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* elf/Makefile ($(objpfx)interp.os): Define for [$(build-shared) = yes]
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only. Depend on $(common-objpfx)runtime-linker.h instead of
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$(elf-objpfx)runtime-linker.h.
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($(elf-objpfx)runtime-linker.h): Rename to
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$(common-objpfx)runtime-linker.h and move ...
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* Makerules [$(build-shared) = yes]: ... here.
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* elf/interp.c: Include <runtime-linker.h> instead of
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<elf/runtime-linker.h>.
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commit 78ad175b3060aae058ed5d05ced2bc58714901cd
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Author: Gleb Fotengauer-Malinovskiy <glebfm@altlinux.org>
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Date: Tue Jun 2 21:04:06 2015 +0300
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nptl: restore .interp section in libpthread.so
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In commit 02657da2cf4457804ed938ee08b8316249126444, .interp section
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was removed from libpthread.so. This led to an error:
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$ /lib64/libpthread.so.0
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Native POSIX Threads Library by Ulrich Drepper et al
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Copyright (C) 2015 Free Software Foundation, Inc.
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This is free software; see the source for copying conditions.
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There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
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PARTICULAR PURPOSE.
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Forced unwind support included.
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Segmentation fault
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(gdb) bt
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#0 0x00000000000055a6 in _exit@plt ()
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Unfortunately, there is no way to add a regression test for the bug
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because .interp specifies the path to dynamic linker of the target
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system.
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[BZ #18479]
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* nptl/pt-interp.c: New file.
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* nptl/Makefile (libpthread-routines, libpthread-shared-only-routines):
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Add pt-interp.
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[$(build-shared) = yes] ($(objpfx)pt-interp.os): Depend on
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$(common-objpfx)runtime-linker.h.
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Index: glibc-2.17-c758a686/nptl/Makefile
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===================================================================
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--- glibc-2.17-c758a686.orig/nptl/Makefile
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+++ glibc-2.17-c758a686/nptl/Makefile
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@@ -30,7 +30,7 @@ routines = alloca_cutoff forward libc-lo
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libc-cleanup
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shared-only-routines = forward
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-libpthread-routines = nptl-init vars events version \
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+libpthread-routines = nptl-init vars events version pt-interp \
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pthread_create pthread_exit pthread_detach \
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pthread_join pthread_tryjoin pthread_timedjoin \
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pthread_self pthread_equal pthread_yield \
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@@ -131,7 +131,8 @@ libpthread-routines = nptl-init vars eve
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# pthread_setgid pthread_setegid pthread_setregid \
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# pthread_setresgid
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-libpthread-shared-only-routines = version pt-allocrtsig unwind-forcedunwind
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+libpthread-shared-only-routines = version pt-interp pt-allocrtsig \
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+ unwind-forcedunwind
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libpthread-static-only-routines = pthread_atfork
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# Since cancellation handling is in large parts handled using exceptions
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@@ -591,6 +592,8 @@ $(objpfx)banner.h: Banner
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generated += banner.h
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# Give libpthread.so an entry point and make it directly runnable itself.
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LDFLAGS-pthread.so += -e __nptl_main
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+# pt-interp.c exists just to get the runtime linker path into libpthread.so.
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+$(objpfx)pt-interp.os: $(common-objpfx)runtime-linker.h
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endif
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ifeq ($(run-built-tests),yes)
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Index: glibc-2.17-c758a686/nptl/pt-interp.c
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===================================================================
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--- /dev/null
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+++ glibc-2.17-c758a686/nptl/pt-interp.c
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@@ -0,0 +1 @@
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+#include <elf/interp.c>
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Index: glibc-2.17-c758a686/Makeconfig
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===================================================================
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--- glibc-2.17-c758a686.orig/Makeconfig
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+++ glibc-2.17-c758a686/Makeconfig
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@@ -566,7 +566,6 @@ endif
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# Variants of the two previous definitions for statically linking programs.
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+prectorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginT.o`
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+postctorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
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-+interp = $(addprefix $(elf-objpfx),interp.os)
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csu-objpfx = $(common-objpfx)csu/
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elf-objpfx = $(common-objpfx)elf/
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Index: glibc-2.17-c758a686/elf/Makefile
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===================================================================
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--- glibc-2.17-c758a686.orig/elf/Makefile
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+++ glibc-2.17-c758a686/elf/Makefile
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@@ -344,16 +344,10 @@ $(objpfx)ld.so: $(objpfx)librtld.os $(ld
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$(READELF) -s $@ \
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| $(AWK) '($$7 ~ /^UND(|EF)$$/ && $$1 != "0:" && $$4 != "REGISTER") { print; p=1 } END { exit p != 0 }'
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+ifeq (yes,$(build-shared))
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# interp.c exists just to get the runtime linker path into libc.so.
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-$(objpfx)interp.os: $(elf-objpfx)runtime-linker.h
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-
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-$(elf-objpfx)runtime-linker.h: $(elf-objpfx)runtime-linker.st; @:
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-$(elf-objpfx)runtime-linker.st: $(common-objpfx)config.make
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- $(name-target-directory)
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- echo '#define RUNTIME_LINKER "$(rtlddir)/$(rtld-installed-name)"' \
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- > ${@:st=T}
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- $(move-if-change) ${@:st=T} ${@:st=h}
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- touch $@
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+$(objpfx)interp.os: $(common-objpfx)runtime-linker.h
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+endif
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ifneq (ld.so,$(rtld-installed-name))
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# Make sure ld.so.1 exists in the build directory so we can link
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Index: glibc-2.17-c758a686/elf/interp.c
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===================================================================
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--- glibc-2.17-c758a686.orig/elf/interp.c
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+++ glibc-2.17-c758a686/elf/interp.c
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@@ -16,7 +16,7 @@
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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-#include <elf/runtime-linker.h>
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+#include <runtime-linker.h>
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const char __invoke_dynamic_linker__[] __attribute__ ((section (".interp")))
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= RUNTIME_LINKER;
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Index: glibc-2.17-c758a686/Makerules
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===================================================================
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--- glibc-2.17-c758a686.orig/Makerules
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+++ glibc-2.17-c758a686/Makerules
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@@ -123,6 +123,16 @@ $(common-objpfx)libc-abis.stamp: $(..)sc
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common-generated += $(common-objpfx)libc-abis.h
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endif # avoid-generated
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+ifeq (yes,$(build-shared))
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+$(common-objpfx)runtime-linker.h: $(common-objpfx)runtime-linker.stamp; @:
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+$(common-objpfx)runtime-linker.stamp: $(common-objpfx)config.make
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+ $(make-target-directory)
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+ echo '#define RUNTIME_LINKER "$(rtlddir)/$(rtld-installed-name)"' \
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+ > ${@:stamp=T}
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+ $(move-if-change) ${@:stamp=T} ${@:stamp=h}
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+ touch $@
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+endif
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+
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# Make sure the subdirectory for object files gets created.
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ifdef objpfx
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ifeq (,$(wildcard $(objpfx).))
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