2021-01-02 19:32:25 +00:00
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/* Copyright (C) 2001-2021 Free Software Foundation, Inc.
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2001-04-04 17:39:59 +00:00
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This file is part of the GNU C Library.
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Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
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The GNU C Library is free software; you can redistribute it and/or
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2001-07-06 04:58:11 +00:00
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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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2001-04-04 17:39:59 +00:00
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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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2001-07-06 04:58:11 +00:00
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Lesser General Public License for more details.
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2001-04-04 17:39:59 +00:00
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2001-07-06 04:58:11 +00:00
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You should have received a copy of the GNU Lesser General Public
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2012-02-09 23:18:22 +00:00
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License along with the GNU C Library; if not, see
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Prefer https to http for gnu.org and fsf.org URLs
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
2019-09-07 05:40:42 +00:00
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<https://www.gnu.org/licenses/>. */
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2001-04-04 17:39:59 +00:00
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#include <sysdep.h>
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#include <features.h>
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#include "ucontext_i.h"
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2014-07-31 18:04:54 +00:00
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#include <shlib-compat.h>
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2001-04-04 17:39:59 +00:00
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/* __getcontext (const ucontext_t *ucp)
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Saves the machine context in UCP such that when it is activated,
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2001-04-10 21:46:48 +00:00
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it appears as if __getcontext() returned again.
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2001-04-04 17:39:59 +00:00
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This implementation is intended to be used for *synchronous* context
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switches only. Therefore, it does not have to save anything
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other than the PRESERVED state. */
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ENTRY(__getcontext)
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2013-03-05 07:15:33 +00:00
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lgr %r1,%r2
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2001-04-04 17:39:59 +00:00
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2014-01-07 08:37:31 +00:00
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/* rt_sigprocmask (SIG_BLOCK, NULL, &sc->sc_mask, sigsetsize). */
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2001-04-04 17:39:59 +00:00
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la %r2,SIG_BLOCK
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2002-01-17 22:56:53 +00:00
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slgr %r3,%r3
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2013-03-05 07:15:33 +00:00
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la %r4,SC_MASK(%r1)
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lghi %r5,_NSIG8
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2001-04-04 17:39:59 +00:00
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svc SYS_ify(rt_sigprocmask)
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/* Store fpu context. */
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2013-03-05 07:15:33 +00:00
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stfpc SC_FPC(%r1)
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std %f0,SC_FPRS(%r1)
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std %f1,SC_FPRS+8(%r1)
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std %f2,SC_FPRS+16(%r1)
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std %f3,SC_FPRS+24(%r1)
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std %f4,SC_FPRS+32(%r1)
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std %f5,SC_FPRS+40(%r1)
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std %f6,SC_FPRS+48(%r1)
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std %f7,SC_FPRS+56(%r1)
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std %f8,SC_FPRS+64(%r1)
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std %f9,SC_FPRS+72(%r1)
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std %f10,SC_FPRS+80(%r1)
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std %f11,SC_FPRS+88(%r1)
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std %f12,SC_FPRS+96(%r1)
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std %f13,SC_FPRS+104(%r1)
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std %f14,SC_FPRS+112(%r1)
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std %f15,SC_FPRS+120(%r1)
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2001-04-04 17:39:59 +00:00
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2001-04-10 21:46:48 +00:00
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/* Set __getcontext return value to 0. */
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2002-01-17 22:56:53 +00:00
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slgr %r2,%r2
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2001-04-10 21:46:48 +00:00
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2001-08-16 05:39:18 +00:00
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/* Store access registers. */
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2013-03-05 07:15:33 +00:00
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stam %a0,%a15,SC_ACRS(%r1)
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2001-08-16 05:39:18 +00:00
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2001-04-04 17:39:59 +00:00
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/* Store general purpose registers. */
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2013-03-05 07:15:33 +00:00
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stmg %r0,%r15,SC_GPRS(%r1)
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2001-04-04 17:39:59 +00:00
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2001-04-10 21:46:48 +00:00
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/* Return. */
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2001-04-04 17:39:59 +00:00
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br %r14
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END(__getcontext)
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2014-07-31 18:04:54 +00:00
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#if defined SHARED && SHLIB_COMPAT (libc, GLIBC_2_19, GLIBC_2_20)
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/* In glibc release 2.19 a new version of getcontext was introduced,
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but was reverted before 2.20. Thus both versions are the same function. */
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weak_alias (__getcontext, __v1__getcontext)
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weak_alias (__getcontext, __v2__getcontext)
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versioned_symbol (libc, __v1__getcontext, getcontext, GLIBC_2_1)
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compat_symbol (libc, __v2__getcontext, getcontext, GLIBC_2_19)
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S390: Clean setjmp, longjmp, getcontext symbols.
For each function setjmp, longjmp, getcontext, there exist a symbol
<func> and a default/versioned symbol <func>@@GLIBC_2.x in the build
obj-files.
This is wrong because it should only exist an unversioned or a
default-versioned symbol with the same name in an obj-file.
Glibc can't be build with recent binutils. See the already fixed linker
bug https://sourceware.org/bugzilla/show_bug.cgi?id=19073.
Nevertheless, this patch cleans this up.
Furthermore the BSD entry points setjmp, _setjmp were marked as weak,
but should be strong as on other architectures.
(see https://sourceware.org/ml/libc-alpha/2014-07/msg00568.html for an
older discussion with Andreas Schwab)
Some whitespace issues are corrected in sysdeps/s390/s390-64/setjmp.S,
too. But there is no change in the assembler code.
ChangeLog:
* sysdeps/s390/longjmp.c (longjmp, _longjmp, siglongjmp):
Don't create weak aliases,
because versioned symbols are created later.
* sysdeps/s390/s390-32/setjmp.S
(setjmp, _setjmp): Remove weak and rename to an unique name
in SHARED case due to existing versioned symbols.
* sysdeps/s390/s390-64/setjmp.S: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/getcontext.S
(getcontext): Create weak alias only in non SHARED case.
* sysdeps/unix/sysv/linux/s390/s390-64/getcontext.S: Likewise.
2015-11-09 15:14:49 +00:00
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#else
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weak_alias (__getcontext, getcontext)
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#endif /* !(defined SHARED && SHLIB_COMPAT (libc, GLIBC_2_19, GLIBC_2_20)) */
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