glibc/sysdeps/unix/sysv/linux/alpha/makecontext.S

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/* Copyright (C) 2004-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
2012-03-09 23:56:38 +00:00
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
2019-09-07 05:40:42 +00:00
<https://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <ucontext-offsets.h>
ENTRY(__makecontext)
ldgp $29, 0($27)
#ifdef PROF
.set noat
lda AT, _mcount
jsr AT, (AT), _mcount
.set at
#endif
.prologue 1
/* Compute top of stack, including arguments. */
ldq $1, UC_STACK+SS_SP($16)
ldq $2, UC_STACK+SS_SIZE($16)
addq $1, $2, $8
subq $18, 6, $1
cmovlt $1, 0, $1
s8addq $1, 0, $2
subq $8, $2, $8
/* Copy all parameters. Switch statement header here. */
ldah $3, $jumptable($29) !gprelhigh
cmple $18, 6, $1
mov $18, $2
cmoveq $1, 7, $2
s4addq $2, $3, $3
ldl $4, $jumptable($3) !gprellow
addq $4, $29, $4
jmp $31, ($4), $args1
.section .rodata
.align 2
$jumptable:
.gprel32 $args0
.gprel32 $args1
.gprel32 $args2
.gprel32 $args3
.gprel32 $args4
.gprel32 $args5
.gprel32 $args6
.gprel32 $argsN
.text
/* Here we process arguments 7 through N. This is a straight
stack-to-stack copy. */
.align 4
$argsN:
subq $18, 6, $1
lda $2, 0($8)
lda $3, 3*8($30)
.align 4
1:
ldq $0, 0($3)
subq $1, 1, $1
lda $3, 8($3)
stq $0, 0($2)
lda $2, 8($2)
bne $1, 1b
/* Here we process arguments 6 through 0. This involves
copying into the register save areas of the ucontext. */
.align 4
$args6:
ldq $0, 2*8($30)
stq $0, UC_SIGCTX+SC_REGS+21*8($16)
unop
stq $0, UC_SIGCTX+SC_FPREGS+21*8($16)
$args5:
ldq $0, 1*8($30)
stq $0, UC_SIGCTX+SC_REGS+20*8($16)
unop
stq $0, UC_SIGCTX+SC_FPREGS+20*8($16)
$args4:
ldq $0, 0*8($30)
stq $0, UC_SIGCTX+SC_REGS+19*8($16)
unop
stq $0, UC_SIGCTX+SC_FPREGS+19*8($16)
$args3:
unop
stq $21, UC_SIGCTX+SC_REGS+18*8($16)
unop
stt $f21, UC_SIGCTX+SC_FPREGS+18*8($16)
$args2:
unop
stq $20, UC_SIGCTX+SC_REGS+17*8($16)
unop
stt $f20, UC_SIGCTX+SC_FPREGS+17*8($16)
$args1:
unop
stq $19, UC_SIGCTX+SC_REGS+16*8($16)
unop
stt $f19, UC_SIGCTX+SC_FPREGS+16*8($16)
$args0:
/* Set up the registers ready to invoke __startcontext.
We seed $27 with the target function address, and $9
with the link from ucp. */
ldah $0, __startcontext($29) !gprelhigh
ldq $1, UC_LINK($16)
lda $0, __startcontext($0) !gprellow
stq $17, UC_SIGCTX+SC_REGS+27*8($16)
stq $8, UC_SIGCTX+SC_REGS+30*8($16)
stq $0, UC_SIGCTX+SC_PC($16)
stq $1, UC_SIGCTX+SC_REGS+9*8($16)
/* No return value from makecontext. */
ret
END(__makecontext)
weak_alias (__makecontext, makecontext)
/* This function is where a new makecontext "thread" begins life.
We have already set up $27 for calling the target function, and
we've set $9 to the UC_LINK of the parent context.
If the function returns, we either jump to the linked context
(if non-null) or exit. */
.align 4
.ent __startcontext
__startcontext:
.frame $31, 0, $31, 0
.prologue 0
jsr $26, ($27), 0
ldgp $29, 0($26)
mov $9, $16
beq $9, 1f
#ifdef PIC
bsr $26, __setcontext !samegp
1: mov $31, $16
bsr $26, HIDDEN_JUMPTARGET(exit) !samegp
#else
jsr $26, __setcontext
ldgp $29, 0($26)
1: mov $31, $16
jsr $26, HIDDEN_JUMPTARGET(exit)
#endif
halt
.end __startcontext