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5a82c74822
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
72 lines
2.7 KiB
C
72 lines
2.7 KiB
C
/* ABI compatibility for 'longjmp' and 'siglongjmp' symbols in libpthread ABI.
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X86 version.
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Copyright (C) 1918-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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
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License as published by the Free Software Foundation; either
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version 2.1 of the 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; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <pthreadP.h>
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#include <jmp_buf-ssp.h>
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#ifdef __x86_64__
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# define SHADOW_STACK_POINTER_SIZE 8
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#else
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# define SHADOW_STACK_POINTER_SIZE 4
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#endif
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/* Assert that the priv field in struct pthread_unwind_buf has space
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to store shadow stack pointer. */
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_Static_assert ((offsetof (struct pthread_unwind_buf, priv)
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<= SHADOW_STACK_POINTER_OFFSET)
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&& ((offsetof (struct pthread_unwind_buf, priv)
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+ sizeof (((struct pthread_unwind_buf *) 0)->priv))
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>= (SHADOW_STACK_POINTER_OFFSET
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+ SHADOW_STACK_POINTER_SIZE)),
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"Shadow stack pointer is not within private storage "
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"of pthread_unwind_buf.");
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#include <shlib-compat.h>
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/* libpthread once had its own longjmp (and siglongjmp alias), though there
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was no apparent reason for it. There is no use in having a separate
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symbol in libpthread, but the historical ABI requires it. For static
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linking, there is no need to provide anything here--the libc version
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will be linked in. For shared library ABI compatibility, there must be
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longjmp and siglongjmp symbols in libpthread.so.
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With an IFUNC resolver, it would be possible to avoid the indirection,
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but the IFUNC resolver might run before the __libc_longjmp symbol has
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been relocated, in which case the IFUNC resolver would not be able to
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provide the correct address. */
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#if SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_22)
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static void __attribute__ ((noreturn, used))
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longjmp_compat (jmp_buf env, int val)
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{
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/* NB: We call __libc_siglongjmp, instead of __libc_longjmp, since
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__libc_longjmp is a private interface for cancellation which
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doesn't restore shadow stack register. */
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__libc_siglongjmp (env, val);
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}
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strong_alias (longjmp_compat, longjmp_alias)
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compat_symbol (libpthread, longjmp_alias, longjmp, GLIBC_2_0);
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strong_alias (longjmp_alias, siglongjmp_alias)
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compat_symbol (libpthread, siglongjmp_alias, siglongjmp, GLIBC_2_0);
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#endif
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