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glibc/sysdeps/unix/sysv/linux/alpha/getcontext.S
Joseph Myers 688903eb3e Update copyright dates with scripts/update-copyrights. 
* All files with FSF copyright notices: Update copyright dates
	using scripts/update-copyrights.
	* locale/programs/charmap-kw.h: Regenerated.
	* locale/programs/locfile-kw.h: Likewise.
2018-01-01 00:32:25 +00:00

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/* Save current context.
Copyright (C) 2004-2018 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
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <ucontext-offsets.h>
/* ??? Should be a better place for this that's asm friendly. */
#define SIG_BLOCK 1
ENTRY (__getcontext)
#ifdef PROF
ldgp gp, 0(pv)
.set noat
lda AT, _mcount
jsr AT, (AT), _mcount
.set at
.prologue 1
#else
.prologue 0
#endif
bsr $0, __getcontext_x
mov $31, $0
ret
END(__getcontext)
weak_alias (__getcontext, getcontext)
/* An internal routine used by getcontext and setcontext.
The incomming return address register is $0. */
.align 4
.globl __getcontext_x
.hidden __getcontext_x
.usepv __getcontext_x, no
cfi_startproc
cfi_return_column (64)
__getcontext_x:
cfi_register (64, 0)
.set noat
/* Return value of getcontext. $0 is the only register
whose value is not preserved. */
stq $31, UC_SIGCTX+SC_REGS($16)
/* Store all registers into the context. */
stq $1, UC_SIGCTX+SC_REGS+1*8($16)
stq $2, UC_SIGCTX+SC_REGS+2*8($16)
stq $3, UC_SIGCTX+SC_REGS+3*8($16)
stq $4, UC_SIGCTX+SC_REGS+4*8($16)
stq $5, UC_SIGCTX+SC_REGS+5*8($16)
stq $6, UC_SIGCTX+SC_REGS+6*8($16)
stq $7, UC_SIGCTX+SC_REGS+7*8($16)
stq $8, UC_SIGCTX+SC_REGS+8*8($16)
stq $9, UC_SIGCTX+SC_REGS+9*8($16)
stq $10, UC_SIGCTX+SC_REGS+10*8($16)
stq $11, UC_SIGCTX+SC_REGS+11*8($16)
stq $12, UC_SIGCTX+SC_REGS+12*8($16)
stq $13, UC_SIGCTX+SC_REGS+13*8($16)
stq $14, UC_SIGCTX+SC_REGS+14*8($16)
stq $15, UC_SIGCTX+SC_REGS+15*8($16)
stq $16, UC_SIGCTX+SC_REGS+16*8($16)
stq $17, UC_SIGCTX+SC_REGS+17*8($16)
stq $18, UC_SIGCTX+SC_REGS+18*8($16)
stq $19, UC_SIGCTX+SC_REGS+19*8($16)
stq $20, UC_SIGCTX+SC_REGS+20*8($16)
stq $21, UC_SIGCTX+SC_REGS+21*8($16)
stq $22, UC_SIGCTX+SC_REGS+22*8($16)
stq $23, UC_SIGCTX+SC_REGS+23*8($16)
stq $24, UC_SIGCTX+SC_REGS+24*8($16)
stq $25, UC_SIGCTX+SC_REGS+25*8($16)
stq $26, UC_SIGCTX+SC_REGS+26*8($16)
stq $27, UC_SIGCTX+SC_REGS+27*8($16)
stq $28, UC_SIGCTX+SC_REGS+28*8($16)
stq $29, UC_SIGCTX+SC_REGS+29*8($16)
stq $30, UC_SIGCTX+SC_REGS+30*8($16)
stq $31, UC_SIGCTX+SC_REGS+31*8($16)
stt $f0, UC_SIGCTX+SC_FPREGS+0*8($16)
stt $f1, UC_SIGCTX+SC_FPREGS+1*8($16)
stt $f2, UC_SIGCTX+SC_FPREGS+2*8($16)
stt $f3, UC_SIGCTX+SC_FPREGS+3*8($16)
stt $f4, UC_SIGCTX+SC_FPREGS+4*8($16)
stt $f5, UC_SIGCTX+SC_FPREGS+5*8($16)
stt $f6, UC_SIGCTX+SC_FPREGS+6*8($16)
stt $f7, UC_SIGCTX+SC_FPREGS+7*8($16)
stt $f8, UC_SIGCTX+SC_FPREGS+8*8($16)
stt $f9, UC_SIGCTX+SC_FPREGS+9*8($16)
stt $f10, UC_SIGCTX+SC_FPREGS+10*8($16)
stt $f11, UC_SIGCTX+SC_FPREGS+11*8($16)
stt $f12, UC_SIGCTX+SC_FPREGS+12*8($16)
stt $f13, UC_SIGCTX+SC_FPREGS+13*8($16)
stt $f14, UC_SIGCTX+SC_FPREGS+14*8($16)
stt $f15, UC_SIGCTX+SC_FPREGS+15*8($16)
stt $f16, UC_SIGCTX+SC_FPREGS+16*8($16)
stt $f17, UC_SIGCTX+SC_FPREGS+17*8($16)
stt $f18, UC_SIGCTX+SC_FPREGS+18*8($16)
stt $f19, UC_SIGCTX+SC_FPREGS+19*8($16)
stt $f20, UC_SIGCTX+SC_FPREGS+20*8($16)
stt $f21, UC_SIGCTX+SC_FPREGS+21*8($16)
stt $f22, UC_SIGCTX+SC_FPREGS+22*8($16)
stt $f23, UC_SIGCTX+SC_FPREGS+23*8($16)
stt $f24, UC_SIGCTX+SC_FPREGS+24*8($16)
stt $f25, UC_SIGCTX+SC_FPREGS+25*8($16)
stt $f26, UC_SIGCTX+SC_FPREGS+26*8($16)
stt $f27, UC_SIGCTX+SC_FPREGS+27*8($16)
stt $f28, UC_SIGCTX+SC_FPREGS+28*8($16)
stt $f29, UC_SIGCTX+SC_FPREGS+29*8($16)
stt $f30, UC_SIGCTX+SC_FPREGS+30*8($16)
stt $f31, UC_SIGCTX+SC_FPREGS+31*8($16)
mf_fpcr $f0
lda $1, 8
stt $f0, UC_SIGCTX+SC_FPCR($16)
/* The return address of getcontext is the restart pc. */
stq $26, UC_SIGCTX+SC_PC($16)
/* Userlevel always has a processor status word of 8. */
stq $1, UC_SIGCTX+SC_PS($16)
/* Save registers around the syscall. We preserve $17
for the benefit of swapcontext. */
subq $30, 4*8, $30
cfi_adjust_cfa_offset(4*8)
stq $0, 0($30)
cfi_rel_offset(64, 0)
stq $16, 8($30)
stq $17, 16($30)
/* Save the current signal mask. Whee, there are three
copies of this in the alpha ucontext_t. */
lda $16, SIG_BLOCK
lda $17, 0
lda $0, __NR_osf_sigprocmask
callsys
ldq $16, 8($30)
ldq $17, 16($30)
stq $0, UC_OSF_SIGMASK($16)
stq $0, UC_SIGCTX+SC_MASK($16)
stq $0, UC_SIGMASK($16)
stq $31, UC_SIGMASK + 1*8($16)
stq $31, UC_SIGMASK + 2*8($16)
stq $31, UC_SIGMASK + 3*8($16)
stq $31, UC_SIGMASK + 4*8($16)
stq $31, UC_SIGMASK + 5*8($16)
stq $31, UC_SIGMASK + 6*8($16)
stq $31, UC_SIGMASK + 7*8($16)
stq $31, UC_SIGMASK + 8*8($16)
stq $31, UC_SIGMASK + 9*8($16)
stq $31, UC_SIGMASK +10*8($16)
stq $31, UC_SIGMASK +11*8($16)
stq $31, UC_SIGMASK +12*8($16)
stq $31, UC_SIGMASK +13*8($16)
stq $31, UC_SIGMASK +14*8($16)
stq $31, UC_SIGMASK +15*8($16)
ldq $0, 0($30)
addq $30, 4*8, $30
cfi_register (64, 0)
cfi_adjust_cfa_offset(-4*8)
ret $31, ($0), 1
cfi_endproc
.size __getcontext_x, .-__getcontext_x
.type __getcontext_x, @function
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