glibc/sysdeps/unix/sysv/linux/hppa/setcontext.S

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/* Install given context.
Copyright (C) 2008-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Helge Deller <deller@gmx.de>, 2008.
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
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License along with the GNU C Library. If not, see
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
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<https://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <libc-symbols.h>
#include "ucontext_i.h"
ENTRY(__setcontext)
/* Prologue */
stw %r2, -20(%sp)
.cfi_offset 2, -20
stwm %r3, 64(%sp)
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.cfi_def_cfa_offset -64
.cfi_offset 3, 0
#ifdef PIC
stw %r19, -32(%sp)
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.cfi_offset 19, 32
#endif
/* Save ucp. */
copy %r26, %r3
.Lagain:
/* Set the current signal mask. */
/* sigprocmask(SIG_BLOCK, &ucp->uc_sigmask, NULL); */
copy %r0, %r24
ldo oSIGMASK(%r3), %r25
bl __sigprocmask, %r2
ldi SIG_SETMASK, %r26
comib,<>,n 0,%ret0,.Lerror
/* Save %sp, %dp. */
copy %sp, %r4
copy %dp, %r5
copy %r19, %r6
/* Get the registers. */
ldw oR1(%r3), %r1
ldw oR2(%r3), %r2
/* ldw oR3(%r3), %r3 - used for ucp pointer. */
/* ldw oR4(%r3), %r4 - used for original %sp. */
/* ldw oR5(%r3), %r5 - used for %dp / %r27. */
/* ldw oR6(%r3), %r6 - used for %r19. */
ldw oR7(%r3), %r7
ldw oR8(%r3), %r8
ldw oR9(%r3), %r9
ldw oR10(%r3), %r10
ldw oR11(%r3), %r11
ldw oR12(%r3), %r12
ldw oR13(%r3), %r13
ldw oR14(%r3), %r14
ldw oR15(%r3), %r15
ldw oR16(%r3), %r16
ldw oR17(%r3), %r17
ldw oR18(%r3), %r18
ldw oR19(%r3), %r19
ldw oR20(%r3), %r20
ldw oR21(%r3), %r21
/* ldw oR22(%r3), %r22 - dyncall arg. */
ldw oR23(%r3), %r23
ldw oR24(%r3), %r24
ldw oR25(%r3), %r25
ldw oR26(%r3), %r26
ldw oR27(%r3), %r27
ldw oR28(%r3), %r28
ldw oR29(%r3), %r29
ldw oR30(%r3), %sp
/* ldw oR31(%r3), %r31 - dyncall scratch register */
/* Restore floating-point registers. */
ldo oFPREGS31(%r3), %r22
fldds 0(%r22), %fr31
fldds,mb -8(%r22), %fr30
fldds,mb -8(%r22), %fr29
fldds,mb -8(%r22), %fr28
fldds,mb -8(%r22), %fr27
fldds,mb -8(%r22), %fr26
fldds,mb -8(%r22), %fr25
fldds,mb -8(%r22), %fr24
fldds,mb -8(%r22), %fr23
fldds,mb -8(%r22), %fr22
fldds,mb -8(%r22), %fr21
fldds,mb -8(%r22), %fr20
fldds,mb -8(%r22), %fr19
fldds,mb -8(%r22), %fr18
fldds,mb -8(%r22), %fr17
fldds,mb -8(%r22), %fr16
fldds,mb -8(%r22), %fr15
fldds,mb -8(%r22), %fr14
fldds,mb -8(%r22), %fr13
fldds,mb -8(%r22), %fr12
fldds,mb -8(%r22), %fr11
fldds,mb -8(%r22), %fr10
fldds,mb -8(%r22), %fr9
fldds,mb -8(%r22), %fr8
fldds,mb -8(%r22), %fr7
fldds,mb -8(%r22), %fr6
fldds,mb -8(%r22), %fr5
fldds,mb -8(%r22), %fr4
fldds,mb -8(%r22), %fr3
fldds,mb -8(%r22), %fr2
fldds,mb -8(%r22), %fr1
fldds,mb -8(%r22), %fr0
/* Do not load oSS_SP into %sp. The value of oSS_SP indicates
the start of the user allocated stack, but not the sp that
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should be used by the new context. In fact makecontext
will create a frame, and adjust sp as required. We do not
support calling getcontext and modifying ss_sp without
a call to makecontext to synchronize ss_sp into the machine
context. */
/* Call external function. */
copy %r2, %r22
bl $$dyncall, %r31
copy %r31, %r2
/* We return here. Get new ucp in %r3, reload %sp. */
ldw oUC_LINK(%r3), %r3
copy %r4, %sp
copy %r5, %dp
copy %r6, %r19
/* Continue until ucp == NULL. */
comib,<> 0,%r3,.Lagain
nop
/* No further context available. Exit now. */
bl HIDDEN_JUMPTARGET(exit), %r2
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ldi 0, %r26
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.Lerror:
/* Epilogue */
ldw -84(%r30), %r2
#ifdef PIC
ldw -32(%r30), %r19
#endif
bv %r0(%r2)
ldwm -64(%r30), %r3
L(pseudo_end):
PSEUDO_END(__setcontext)
weak_alias(__setcontext, setcontext)