// clang-format off /* * This file is part of the Trezor project, https://trezor.io/ * * Copyright (c) SatoshiLabs * * This program 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 of the License, or * (at your option) any later version. * * This program 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. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ /* * This file is part of the MicroPython project, http://micropython.org/ * * The MIT License (MIT) * * Copyright (c) 2013-2016 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. */ #pragma GCC optimize("no-stack-protector") // applies to all functions in this file #include "py/mpstate.h" #include "py/nlr.h" #if (!defined(MICROPY_NLR_SETJMP) || !MICROPY_NLR_SETJMP) && (defined(__thumb2__) || defined(__thumb__) || defined(__arm__)) #undef nlr_push // 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 __attribute__((naked)) unsigned int nlr_push(nlr_buf_t *nlr) { __asm volatile ( "str r4, [r0, #12] \n" // store r4 into nlr_buf "str r5, [r0, #16] \n" // store r5 into nlr_buf "str r6, [r0, #20] \n" // store r6 into nlr_buf "str r7, [r0, #24] \n" // store r7 into nlr_buf #if defined(__ARM_ARCH_6M__) "mov r1, r8 \n" "str r1, [r0, #28] \n" // store r8 into nlr_buf "mov r1, r9 \n" "str r1, [r0, #32] \n" // store r9 into nlr_buf "mov r1, r10 \n" "str r1, [r0, #36] \n" // store r10 into nlr_buf "mov r1, r11 \n" "str r1, [r0, #40] \n" // store r11 into nlr_buf "mov r1, r13 \n" "str r1, [r0, #44] \n" // store r13=sp into nlr_buf "mov r1, lr \n" "str r1, [r0, #8] \n" // store lr into nlr_buf #else "str r8, [r0, #28] \n" // store r8 into nlr_buf "str r9, [r0, #32] \n" // store r9 into nlr_buf "str r10, [r0, #36] \n" // store r10 into nlr_buf "str r11, [r0, #40] \n" // store r11 into nlr_buf "str r13, [r0, #44] \n" // store r13=sp into nlr_buf "str lr, [r0, #8] \n" // store lr into nlr_buf #endif #if defined(__ARM_ARCH_6M__) "ldr r1, nlr_push_tail_var \n" "bx r1 \n" // do the rest in C ".align 2 \n" "nlr_push_tail_var: .word nlr_push_tail \n" #else "b nlr_push_tail \n" // do the rest in C #endif ); return 0; // needed to silence compiler warning } __attribute__((used)) unsigned int nlr_push_tail(nlr_buf_t *nlr) { nlr_buf_t **top = &MP_STATE_THREAD(nlr_top); nlr->prev = *top; *top = nlr; return 0; // normal return } void nlr_pop(void) { nlr_buf_t **top = &MP_STATE_THREAD(nlr_top); *top = (*top)->prev; } NORETURN __attribute__((naked)) void nlr_jump(void *val) { nlr_buf_t **top_ptr = &MP_STATE_THREAD(nlr_top); nlr_buf_t *top = *top_ptr; if (top == NULL) { nlr_jump_fail(val); } top->ret_val = val; *top_ptr = top->prev; __asm volatile ( "mov r0, %0 \n" // r0 points to nlr_buf "ldr r4, [r0, #12] \n" // load r4 from nlr_buf "ldr r5, [r0, #16] \n" // load r5 from nlr_buf "ldr r6, [r0, #20] \n" // load r6 from nlr_buf "ldr r7, [r0, #24] \n" // load r7 from nlr_buf #if defined(__ARM_ARCH_6M__) "ldr r1, [r0, #28] \n" // load r8 from nlr_buf "mov r8, r1 \n" "ldr r1, [r0, #32] \n" // load r9 from nlr_buf "mov r9, r1 \n" "ldr r1, [r0, #36] \n" // load r10 from nlr_buf "mov r10, r1 \n" "ldr r1, [r0, #40] \n" // load r11 from nlr_buf "mov r11, r1 \n" "ldr r1, [r0, #44] \n" // load r13=sp from nlr_buf "mov r13, r1 \n" "ldr r1, [r0, #8] \n" // load lr from nlr_buf "mov lr, r1 \n" #else "ldr r8, [r0, #28] \n" // load r8 from nlr_buf "ldr r9, [r0, #32] \n" // load r9 from nlr_buf "ldr r10, [r0, #36] \n" // load r10 from nlr_buf "ldr r11, [r0, #40] \n" // load r11 from nlr_buf "ldr r13, [r0, #44] \n" // load r13=sp from nlr_buf "ldr lr, [r0, #8] \n" // load lr from nlr_buf #endif "movs r0, #1 \n" // return 1, non-local return "bx lr \n" // return : // output operands : "r"(top) // input operands : // clobbered registers ); for (;;); // needed to silence compiler warning } #endif // (!defined(MICROPY_NLR_SETJMP) || !MICROPY_NLR_SETJMP) && (defined(__thumb2__) || defined(__thumb__) || defined(__arm__))