| /* |
| * This file is part of the Micro Python project, http://micropython.org/ |
| * |
| * The MIT License (MIT) |
| * |
| * Copyright (c) 2013, 2014 Damien P. George |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| #if (!defined(MICROPY_NLR_SETJMP) || !MICROPY_NLR_SETJMP) && (defined(__thumb2__) || defined(__thumb__) || defined(__arm__)) |
| |
| // We only need the functions here if we are on arm/thumb, and we are not |
| // using setjmp/longjmp. |
| // |
| // For reference, arm/thumb callee save regs are: |
| // r4-r11, r13=sp |
| |
| // the offset of nlr_top within mp_state_ctx_t |
| #define NLR_TOP_OFFSET (2 * 4) |
| |
| .syntax unified |
| /*.cpu cortex-m4*/ |
| /*.thumb*/ |
| .text |
| .align 2 |
| |
| /**************************************/ |
| // mp_uint_t nlr_push(r0=nlr_buf_t *nlr) |
| |
| .global nlr_push |
| #if defined(__thumb2__) |
| .thumb |
| .thumb_func |
| #endif |
| .type nlr_push, %function |
| nlr_push: |
| str lr, [r0, #8] @ store lr into nlr_buf |
| str r4, [r0, #12] @ store r4 into nlr_buf |
| str r5, [r0, #16] @ store r5 into nlr_buf |
| str r6, [r0, #20] @ store r6 into nlr_buf |
| str r7, [r0, #24] @ store r7 into nlr_buf |
| str r8, [r0, #28] @ store r8 into nlr_buf |
| str r9, [r0, #32] @ store r9 into nlr_buf |
| str r10, [r0, #36] @ store r10 into nlr_buf |
| str r11, [r0, #40] @ store r11 into nlr_buf |
| str r13, [r0, #44] @ store r13=sp into nlr_buf |
| |
| ldr r3, nlr_top_addr @ load addr of nlr_top |
| ldr r2, [r3] @ load nlr_top |
| str r2, [r0] @ store nlr_top into nlr_buf |
| str r0, [r3] @ store nlr_buf into nlr_top (to link list) |
| |
| movs r0, #0 @ return 0, normal return |
| bx lr @ return |
| .align 2 |
| nlr_top_addr: |
| .word mp_state_ctx + NLR_TOP_OFFSET |
| .size nlr_push, .-nlr_push |
| |
| /**************************************/ |
| // void nlr_pop() |
| |
| .global nlr_pop |
| #if defined(__thumb2__) |
| .thumb |
| .thumb_func |
| #endif |
| .type nlr_pop, %function |
| nlr_pop: |
| ldr r3, nlr_top_addr @ load addr of nlr_top |
| ldr r2, [r3] @ load nlr_top |
| ldr r2, [r2] @ load prev nlr_buf |
| str r2, [r3] @ store prev nlr_buf to nlr_top (to unlink list) |
| bx lr @ return |
| .size nlr_pop, .-nlr_pop |
| |
| /**************************************/ |
| // void nlr_jump(r0=mp_uint_t val) |
| |
| .global nlr_jump |
| #if defined(__thumb2__) |
| .thumb |
| .thumb_func |
| #endif |
| .type nlr_jump, %function |
| nlr_jump: |
| ldr r3, nlr_top_addr @ load addr of nlr_top |
| ldr r2, [r3] @ load nlr_top |
| cmp r2, #0 @ test if nlr_top is NULL |
| beq nlr_jump_fail @ if nlr_top is NULL, transfer control to nlr_jump_fail |
| str r0, [r2, #4] @ store return value |
| ldr r0, [r2] @ load prev nlr_buf |
| str r0, [r3] @ store prev nol_buf into nlr_top (to unlink list) |
| |
| ldr lr, [r2, #8] @ load lr from nlr_buf |
| ldr r4, [r2, #12] @ load r4 from nlr_buf |
| ldr r5, [r2, #16] @ load r5 from nlr_buf |
| ldr r6, [r2, #20] @ load r6 from nlr_buf |
| ldr r7, [r2, #24] @ load r7 from nlr_buf |
| ldr r8, [r2, #28] @ load r8 from nlr_buf |
| ldr r9, [r2, #32] @ load r9 from nlr_buf |
| ldr r10, [r2, #36] @ load r10 from nlr_buf |
| ldr r11, [r2, #40] @ load r11 from nlr_buf |
| ldr r13, [r2, #44] @ load r13=sp from nlr_buf |
| |
| movs r0, #1 @ return 1, non-local return |
| bx lr @ return |
| .size nlr_jump, .-nlr_jump |
| |
| #endif // (!defined(MICROPY_NLR_SETJMP) || !MICROPY_NLR_SETJMP) && (defined(__thumb2__) || defined(__thumb__) || defined(__arm__)) |