119 lines
3.6 KiB
ArmAsm
119 lines
3.6 KiB
ArmAsm
/* This file contains the GPR save and restore routines for Darwin.
|
|
*
|
|
* Copyright (C) 2011-2015 Free Software Foundation, Inc.
|
|
*
|
|
* This file is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 3, or (at your option) any
|
|
* later version.
|
|
*
|
|
* This file 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
|
|
* General Public License for more details.
|
|
*
|
|
* Under Section 7 of GPL version 3, you are granted additional
|
|
* permissions described in the GCC Runtime Library Exception, version
|
|
* 3.1, as published by the Free Software Foundation.
|
|
*
|
|
* You should have received a copy of the GNU General Public License and
|
|
* a copy of the GCC Runtime Library Exception along with this program;
|
|
* see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
* <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/* Contributed by Iain Sandoe <iains@gcc.gnu.org> */
|
|
|
|
/* Like their FP and VEC counterparts, these routines have only one externally
|
|
visible entry point. Calls have to be constructed as offsets from this.
|
|
(I.E. callers have to jump to "saveGPR+((x-13)*4" to save registers x..31).
|
|
|
|
Each save/load instruction is 4 bytes long (for both m32 and m64 builds).
|
|
|
|
The save/restores here are done w.r.t r11.
|
|
|
|
restGPRx restores the link reg from the stack and returns to the saved
|
|
address.
|
|
|
|
*/
|
|
|
|
#include "darwin-asm.h"
|
|
|
|
.text
|
|
.align 2
|
|
|
|
.private_extern saveGPR
|
|
saveGPR:
|
|
stg r13,(-19 * GPR_BYTES)(r11)
|
|
stg r14,(-18 * GPR_BYTES)(r11)
|
|
stg r15,(-17 * GPR_BYTES)(r11)
|
|
stg r16,(-16 * GPR_BYTES)(r11)
|
|
stg r17,(-15 * GPR_BYTES)(r11)
|
|
stg r18,(-14 * GPR_BYTES)(r11)
|
|
stg r19,(-13 * GPR_BYTES)(r11)
|
|
stg r20,(-12 * GPR_BYTES)(r11)
|
|
stg r21,(-11 * GPR_BYTES)(r11)
|
|
stg r22,(-10 * GPR_BYTES)(r11)
|
|
stg r23,( -9 * GPR_BYTES)(r11)
|
|
stg r24,( -8 * GPR_BYTES)(r11)
|
|
stg r25,( -7 * GPR_BYTES)(r11)
|
|
stg r26,( -6 * GPR_BYTES)(r11)
|
|
stg r27,( -5 * GPR_BYTES)(r11)
|
|
stg r28,( -4 * GPR_BYTES)(r11)
|
|
stg r29,( -3 * GPR_BYTES)(r11)
|
|
stg r30,( -2 * GPR_BYTES)(r11)
|
|
stg r31,( -1 * GPR_BYTES)(r11)
|
|
blr
|
|
|
|
/* */
|
|
|
|
.private_extern restGPR
|
|
restGPR:
|
|
lg r13,(-19 * GPR_BYTES)(r11)
|
|
lg r14,(-18 * GPR_BYTES)(r11)
|
|
lg r15,(-17 * GPR_BYTES)(r11)
|
|
lg r16,(-16 * GPR_BYTES)(r11)
|
|
lg r17,(-15 * GPR_BYTES)(r11)
|
|
lg r18,(-14 * GPR_BYTES)(r11)
|
|
lg r19,(-13 * GPR_BYTES)(r11)
|
|
lg r20,(-12 * GPR_BYTES)(r11)
|
|
lg r21,(-11 * GPR_BYTES)(r11)
|
|
lg r22,(-10 * GPR_BYTES)(r11)
|
|
lg r23,( -9 * GPR_BYTES)(r11)
|
|
lg r24,( -8 * GPR_BYTES)(r11)
|
|
lg r25,( -7 * GPR_BYTES)(r11)
|
|
lg r26,( -6 * GPR_BYTES)(r11)
|
|
lg r27,( -5 * GPR_BYTES)(r11)
|
|
lg r28,( -4 * GPR_BYTES)(r11)
|
|
lg r29,( -3 * GPR_BYTES)(r11)
|
|
lg r30,( -2 * GPR_BYTES)(r11)
|
|
lg r31,( -1 * GPR_BYTES)(r11)
|
|
blr
|
|
|
|
.private_extern restGPRx
|
|
restGPRx:
|
|
lg r13,(-19 * GPR_BYTES)(r11)
|
|
lg r14,(-18 * GPR_BYTES)(r11)
|
|
lg r15,(-17 * GPR_BYTES)(r11)
|
|
lg r16,(-16 * GPR_BYTES)(r11)
|
|
lg r17,(-15 * GPR_BYTES)(r11)
|
|
lg r18,(-14 * GPR_BYTES)(r11)
|
|
lg r19,(-13 * GPR_BYTES)(r11)
|
|
lg r20,(-12 * GPR_BYTES)(r11)
|
|
lg r21,(-11 * GPR_BYTES)(r11)
|
|
lg r22,(-10 * GPR_BYTES)(r11)
|
|
lg r23,( -9 * GPR_BYTES)(r11)
|
|
lg r24,( -8 * GPR_BYTES)(r11)
|
|
lg r25,( -7 * GPR_BYTES)(r11)
|
|
lg r26,( -6 * GPR_BYTES)(r11)
|
|
lg r27,( -5 * GPR_BYTES)(r11)
|
|
lg r28,( -4 * GPR_BYTES)(r11)
|
|
lg r29,( -3 * GPR_BYTES)(r11)
|
|
/* Like the FP restore, we start from the offset for r30
|
|
thus a restore of only r31 is not going to work. */
|
|
lg r0,SAVED_LR_OFFSET(r1)
|
|
lg r30,( -2 * GPR_BYTES)(r11)
|
|
mtlr r0
|
|
lg r31,( -1 * GPR_BYTES)(r11)
|
|
blr
|