mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 22:10:13 +00:00
164 lines
3.7 KiB
ArmAsm
164 lines
3.7 KiB
ArmAsm
/* Copyright (C) 2004-2024 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
|
|
<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
|