From 9e78f6f6e7134a5f299cc8de77370218f8019237 Mon Sep 17 00:00:00 2001 From: Florian Weimer Date: Wed, 30 Nov 2016 15:59:57 +0100 Subject: 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. --- elf/tst-latepthreadmod.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 elf/tst-latepthreadmod.c (limited to 'elf/tst-latepthreadmod.c') diff --git a/elf/tst-latepthreadmod.c b/elf/tst-latepthreadmod.c new file mode 100644 index 0000000..ce81206 --- /dev/null +++ b/elf/tst-latepthreadmod.c @@ -0,0 +1,33 @@ +/* DSO which links against libpthread and triggers a lazy binding. + Copyright (C) 2016 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +/* This file is compiled into a DSO which loads libpthread, but fails + the dynamic linker afterwards. */ + +#include + +/* Link in libpthread. */ +void *pthread_create_ptr = &pthread_create; + +int this_function_is_not_defined (void); + +int +trigger_dynlink_failure (void) +{ + return this_function_is_not_defined (); +} -- cgit v1.1