diff options
| author | Florian Weimer <fweimer@redhat.com> | 2016-11-30 15:59:57 +0100 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2016-11-30 15:59:57 +0100 |
| commit | 9e78f6f6e7134a5f299cc8de77370218f8019237 (patch) | |
| tree | 04aa339daf9901b8fc1851353c697528659e7afe /elf/Makefile | |
| parent | 705a79f82560ff6472cebed86aa5db04cdea3bce (diff) | |
Implement _dl_catch_error, _dl_signal_error in libc.so [BZ #16628]
This change moves the main implementation of _dl_catch_error,
_dl_signal_error to libc.so, where TLS variables can be used
directly. This removes a writable function pointer from the
rtld_global variable.
For use during initial relocation, minimal implementations of these
functions are provided in ld.so. These are eventually interposed
by the libc.so implementations. This is implemented by compiling
elf/dl-error-skeleton.c twice, via elf/dl-error.c and
elf/dl-error-minimal.c.
As a side effect of this change, the static version of dl-error.c
no longer includes support for the
_dl_signal_cerror/_dl_receive_error mechanism because it is only
used in ld.so.
Diffstat (limited to 'elf/Makefile')
| -rw-r--r-- | elf/Makefile | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/elf/Makefile b/elf/Makefile index 82c7e0559d..33b003b170 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -24,12 +24,12 @@ include ../Makeconfig headers = elf.h bits/elfclass.h link.h bits/link.h routines = $(all-dl-routines) dl-support dl-iteratephdr \ dl-addr dl-addr-obj enbl-secure dl-profstub \ - dl-origin dl-libc dl-sym dl-tsd dl-sysdep + dl-origin dl-libc dl-sym dl-sysdep dl-error # The core dynamic linking functions are in libc for the static and # profiled libraries. dl-routines = $(addprefix dl-,load lookup object reloc deps hwcaps \ - runtime error init fini debug misc \ + runtime init fini debug misc \ version profile conflict tls origin scope \ execstack caller open close trampoline) ifeq (yes,$(use-ldconfig)) @@ -43,7 +43,8 @@ shared-only-routines += dl-caller # ld.so uses those routines, plus some special stuff for being the program # interpreter and operating independent of libc. -rtld-routines = rtld $(all-dl-routines) dl-sysdep dl-environ dl-minimal +rtld-routines = rtld $(all-dl-routines) dl-sysdep dl-environ dl-minimal \ + dl-error-minimal all-rtld-routines = $(rtld-routines) $(sysdep-rtld-routines) CFLAGS-dl-runtime.c = -fexceptions -fasynchronous-unwind-tables @@ -150,7 +151,8 @@ tests += loadtest restest1 preloadtest loadfail multiload origtest resolvfail \ tst-nodelete) \ tst-initorder tst-initorder2 tst-relsort1 tst-null-argv \ tst-ptrguard1 tst-tlsalign tst-tlsalign-extern tst-nodelete-opened \ - tst-nodelete2 tst-audit11 tst-audit12 tst-dlsym-error tst-noload + tst-nodelete2 tst-audit11 tst-audit12 tst-dlsym-error tst-noload \ + tst-latepthread # reldep9 ifeq ($(build-hardcoded-path-in-tests),yes) tests += tst-dlopen-aout @@ -224,7 +226,8 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \ tst-array5dep tst-null-argv-lib \ tst-tlsalign-lib tst-nodelete-opened-lib tst-nodelete2mod \ tst-audit11mod1 tst-audit11mod2 tst-auditmod11 \ - tst-audit12mod1 tst-audit12mod2 tst-audit12mod3 tst-auditmod12 + tst-audit12mod1 tst-audit12mod2 tst-audit12mod3 tst-auditmod12 \ + tst-latepthreadmod ifeq (yes,$(have-mtls-dialect-gnu2)) tests += tst-gnu2-tls1 modules-names += tst-gnu2-tls1mod @@ -1264,6 +1267,14 @@ tst-audit12-ENV = LD_AUDIT=$(objpfx)tst-auditmod12.so $(objpfx)tst-audit12mod1.so: $(objpfx)tst-audit12mod2.so LDFLAGS-tst-audit12mod2.so = -Wl,--version-script=tst-audit12mod2.map +# Override -z defs, so that we can reference an undefined symbol. +# Force lazy binding for the same reason. +LDFLAGS-tst-latepthreadmod.so = \ + -Wl,-z,lazy -Wl,--unresolved-symbols=ignore-all +$(objpfx)tst-latepthreadmod.so: $(shared-thread-library) +$(objpfx)tst-latepthread: $(libdl) +$(objpfx)tst-latepthread.out: $(objpfx)tst-latepthreadmod.so + tst-prelink-ENV = LD_TRACE_PRELINKING=1 $(objpfx)tst-prelink-conflict.out: $(objpfx)tst-prelink.out |