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87 lines
2.6 KiB
C
87 lines
2.6 KiB
C
/* Copyright (C) 2003-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Jakub Jelinek <jakub@redhat.com>.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, see <http://www.gnu.org/licenses/>. */
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#include <dlfcn.h>
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#include <stdio.h>
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#include <unwind.h>
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#include <gnu/lib-names.h>
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#include <sysdep.h>
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#include <unwind-resume.h>
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void (*__libgcc_s_resume) (struct _Unwind_Exception *exc)
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attribute_hidden __attribute__ ((noreturn));
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static _Unwind_Reason_Code (*libgcc_s_personality) PERSONALITY_PROTO;
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void attribute_hidden __attribute__ ((cold))
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__libgcc_s_init (void)
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{
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void *resume, *personality;
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void *handle;
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/* Use RTLD_NOW here for consistency with pthread_cancel_init.
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RTLD_NOW will rarely make a difference here because unwinding is
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already in progress, so libgcc_s.so has already been loaded if
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its unwinder is used. */
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handle = __libc_dlopen_mode (LIBGCC_S_SO, RTLD_NOW | __RTLD_DLOPEN);
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if (handle == NULL
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|| (resume = __libc_dlsym (handle, "_Unwind_Resume")) == NULL
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|| (personality = __libc_dlsym (handle, "__gcc_personality_v0")) == NULL)
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__libc_fatal (LIBGCC_S_SO
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" must be installed for unwinding to work\n");
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#ifdef PTR_MANGLE
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PTR_MANGLE (resume);
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#endif
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__libgcc_s_resume = resume;
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#ifdef PTR_MANGLE
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PTR_MANGLE (personality);
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#endif
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libgcc_s_personality = personality;
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}
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#if !HAVE_ARCH_UNWIND_RESUME
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void
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_Unwind_Resume (struct _Unwind_Exception *exc)
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{
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if (__glibc_unlikely (__libgcc_s_resume == NULL))
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__libgcc_s_init ();
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__typeof (__libgcc_s_resume) resume = __libgcc_s_resume;
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#ifdef PTR_DEMANGLE
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PTR_DEMANGLE (resume);
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#endif
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(*resume) (exc);
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}
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#endif
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_Unwind_Reason_Code
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__gcc_personality_v0 PERSONALITY_PROTO
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{
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if (__glibc_unlikely (libgcc_s_personality == NULL))
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__libgcc_s_init ();
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__typeof (libgcc_s_personality) personality = libgcc_s_personality;
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#ifdef PTR_DEMANGLE
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PTR_DEMANGLE (personality);
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#endif
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return (*personality) PERSONALITY_ARGS;
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}
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