2012-07-16 14:54:37 +00:00
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/* Save current context and install the given one.
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2020-01-01 00:14:33 +00:00
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Copyright (C) 2012-2020 Free Software Foundation, Inc.
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2012-07-16 14:54:37 +00:00
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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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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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2012-07-16 14:54:37 +00:00
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#include <sysdep.h>
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#include "ucontext_i.h"
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ENTRY(__swapcontext)
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/* Load address of the context data structure we save in. */
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move.l 4(%sp), %a0
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/* Save the preserved registers and the return address. */
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movem.l %d2-%d7, oGREGS+2*4(%a0)
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movem.l %a2-%a6, oGREGS+10*4(%a0)
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lea 4(%sp), %a1
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move.l %a1, oSP(%a0)
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move.l (%sp), oPC(%a0)
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fmovem.l %fpsr/%fpcr/%fpiar, oFPREGS(%a0)
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fmovem.x %fp2-%fp7, oFP2(%a0)
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cfi_def_cfa (%a0, 0)
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cfi_offset (%d2, oGREGS+2*4)
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cfi_offset (%d3, oGREGS+3*4)
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cfi_offset (%a2, oGREGS+10*4)
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cfi_offset (%pc, oPC)
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/* Load address of the context data structure we have to load. */
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move.l 8(%sp), %a1
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/* Save the current signal mask and install the new one. */
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lea oSIGMASK(%a0), %a2
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move.l %a2, %d3
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lea oSIGMASK(%a1), %a2
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move.l %a2, %d2
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move.l #SIG_SETMASK, %d1
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move.l #__NR_sigprocmask, %d0
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trap #0
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cmp.l #-4095, %d0 /* Check %d0 for error. */
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jcs 0f
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/* Restore registers. */
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move.l oGREGS+2*4(%a0), %d2
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cfi_restore (%d2)
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move.l oGREGS+3*4(%a0), %d3
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cfi_restore (%d3)
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move.l oGREGS+10*4(%a0), %a2
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cfi_restore (%a2)
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jra SYSCALL_ERROR_LABEL /* Jump to error handler. */
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0: /* Load the new stack pointer. */
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move.l oSP(%a1), %sp
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cfi_def_cfa (%a1, 0)
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cfi_offset (%d2, oGREGS+2*4)
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cfi_offset (%d3, oGREGS+3*4)
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cfi_offset (%d4, oGREGS+4*4)
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cfi_offset (%d5, oGREGS+5*4)
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cfi_offset (%d6, oGREGS+6*4)
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cfi_offset (%d7, oGREGS+7*4)
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cfi_offset (%a2, oGREGS+10*4)
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cfi_offset (%a3, oGREGS+11*4)
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cfi_offset (%a4, oGREGS+12*4)
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cfi_offset (%a5, oGREGS+13*4)
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cfi_offset (%a6, oGREGS+14*4)
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cfi_offset (%fp2, oFP2+0*12)
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cfi_offset (%fp3, oFP2+1*12)
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cfi_offset (%fp4, oFP2+2*12)
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cfi_offset (%fp5, oFP2+3*12)
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cfi_offset (%fp6, oFP2+4*12)
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cfi_offset (%fp7, oFP2+5*12)
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cfi_offset (%pc, oPC)
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/* Load the values of all the preserved registers (except SP). */
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movem.l oGREGS+2*4(%a1), %d2-%d7
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movem.l oGREGS+10*4(%a1), %a2-%a6
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fmovem.l oFPREGS(%a1), %fpsr/%fpcr/%fpiar
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fmovem.x oFP2(%a1), %fp2-%fp7
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/* Clear D0 to indicate success. */
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clr.l %d0
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/* Fetch the address to return to. */
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move.l oPC(%a1), %a0
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/* End FDE here, we fall into another context. */
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cfi_endproc
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cfi_startproc
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cfi_register (%pc, %a0)
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jmp (%a0)
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cfi_offset (%pc, -4)
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PSEUDO_END(__swapcontext)
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weak_alias (__swapcontext, swapcontext)
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