mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-21 10:20:06 +00:00
145 lines
2.6 KiB
ArmAsm
145 lines
2.6 KiB
ArmAsm
/* Create new context.
|
|
Copyright (C) 2005 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_i.h"
|
|
|
|
/* void __makecontext (struct ucontext *ucp, void (*func)(), int argc, ...);
|
|
__makecontext sets up a stack and registers for context to run a given
|
|
function. The registers are set up like this:
|
|
r4-r7: parameters 1 to 4
|
|
r8 : uc_link from ucontext structure
|
|
pc : (*func) pointer
|
|
pr : address of exitcode
|
|
r15 : stack pointer for func. */
|
|
|
|
.text
|
|
.align 5
|
|
ENTRY(__makecontext)
|
|
mov #4, r3
|
|
mov.l @(oSS_SP,r4), r1
|
|
mov.l @(oSS_SIZE,r4), r2
|
|
add r1, r2
|
|
cmp/gt r6, r3
|
|
bf/s 1f
|
|
shlr2 r2
|
|
sub r6, r2
|
|
add r3, r2
|
|
1:
|
|
shll2 r2
|
|
mov #oR15, r0
|
|
mov.l @(oLINK,r4), r1
|
|
mov.l r2, @(r0,r4)
|
|
mov.l r1, @(oR8,r4)
|
|
mov #oPC, r0
|
|
mov.l r5, @(r0,r4)
|
|
|
|
cmp/pl r6
|
|
bf/s .L1
|
|
dt r6
|
|
mov.l r7, @(oR4,r4)
|
|
cmp/pl r6
|
|
bf/s .L1
|
|
dt r6
|
|
mov.l @(0,r15), r1
|
|
mov.l r1, @(oR5,r4)
|
|
cmp/pl r6
|
|
bf/s .L1
|
|
dt r6
|
|
mov.l @(4,r15), r1
|
|
mov.l r1, @(oR6,r4)
|
|
cmp/pl r6
|
|
bf/s .L1
|
|
dt r6
|
|
mov.l @(8,r15), r1
|
|
mov.l r1, @(oR7,r4)
|
|
mov #12,r0
|
|
.L0:
|
|
cmp/pl r6
|
|
bf/s .L1
|
|
dt r6
|
|
mov.l @(r0,r15), r1
|
|
mov.l r1, @r2
|
|
add #4, r0
|
|
bra .L0
|
|
add #4, r2
|
|
.L1:
|
|
#ifdef PIC
|
|
mova .Lexitcode, r0
|
|
#else
|
|
mov.l .L2, r0
|
|
#endif
|
|
add #oPR, r4
|
|
rts
|
|
mov.l r0, @r4
|
|
#ifndef PIC
|
|
.align 2
|
|
.L2:
|
|
.long .Lexitcode
|
|
#endif
|
|
cfi_endproc
|
|
|
|
.align 5
|
|
.Lexitcode:
|
|
tst r8, r8
|
|
bt/s 2f
|
|
mov r8, r4
|
|
#ifdef PIC
|
|
mova .Lgot, r0
|
|
mov.l .Lgot, r12
|
|
add r0, r12
|
|
mov.l .L3, r1
|
|
bsrf r1
|
|
.LPCS0:
|
|
nop
|
|
#else
|
|
mov.l .L3, r1
|
|
jsr @r1
|
|
nop
|
|
#endif
|
|
2:
|
|
mov.l .L4, r1
|
|
#ifdef PIC
|
|
add r12, r1
|
|
#endif
|
|
jsr @r1
|
|
mov r0, r4
|
|
0:
|
|
bra 0b
|
|
nop
|
|
|
|
.align 2
|
|
#ifdef PIC
|
|
.Lgot:
|
|
.long _GLOBAL_OFFSET_TABLE_
|
|
.L3:
|
|
.long __setcontext@PLT-(.LPCS0+2-(.))
|
|
.L4:
|
|
.long HIDDEN_JUMPTARGET(exit)@GOTOFF
|
|
#else
|
|
.L3:
|
|
.long __setcontext
|
|
.L4:
|
|
.long HIDDEN_JUMPTARGET(exit)
|
|
#endif
|
|
cfi_startproc
|
|
PSEUDO_END(__makecontext)
|
|
|
|
weak_alias (__makecontext, makecontext)
|