/* * This file is part of the MicroPython project, http://micropython.org/ * * The MIT License (MIT) * * Copyright (c) 2013-2015 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 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 #if defined(__ARM_ARCH_6M__) mov r1, r8 str r1, [r0, #28] @ store r8 into nlr_buf mov r1, r9 str r1, [r0, #32] @ store r9 into nlr_buf mov r1, r10 str r1, [r0, #36] @ store r10 into nlr_buf mov r1, r11 str r1, [r0, #40] @ store r11 into nlr_buf mov r1, r13 str r1, [r0, #44] @ store r13=sp into nlr_buf mov r1, lr str r1, [r0, #8] @ store lr into nlr_buf #else 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 str lr, [r0, #8] @ store lr into nlr_buf #endif 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 .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 #if defined(__ARM_ARCH_6M__) bne nlr_jump_non_null @ if nlr_top is NULL, transfer control to nlr_jump_fail bl nlr_jump_fail nlr_jump_non_null: #else beq nlr_jump_fail @ if nlr_top is NULL, transfer control to nlr_jump_fail #endif 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 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 #if defined(__ARM_ARCH_6M__) ldr r1, [r2, #28] @ load r8 from nlr_buf mov r8, r1 ldr r1, [r2, #32] @ load r9 from nlr_buf mov r9, r1 ldr r1, [r2, #36] @ load r10 from nlr_buf mov r10, r1 ldr r1, [r2, #40] @ load r11 from nlr_buf mov r11, r1 ldr r1, [r2, #44] @ load r13=sp from nlr_buf mov r13, r1 ldr r1, [r2, #8] @ load lr from nlr_buf mov lr, r1 #else 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 ldr lr, [r2, #8] @ load lr from nlr_buf #endif movs r0, #1 @ return 1, non-local return bx lr @ return .size nlr_jump, .-nlr_jump .align 2 nlr_top_addr: .word mp_state_ctx + NLR_TOP_OFFSET #endif // (!defined(MICROPY_NLR_SETJMP) || !MICROPY_NLR_SETJMP) && (defined(__thumb2__) || defined(__thumb__) || defined(__arm__))