| /* This file contains the GPR save and restore routines for Darwin. |
| * |
| * Copyright (C) 2011-2021 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 |
