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1 : : /* 2 : : * This file is part of the MicroPython project, http://micropython.org/ 3 : : * 4 : : * The MIT License (MIT) 5 : : * 6 : : * Copyright (c) 2013-2017 Damien P. George 7 : : * 8 : : * Permission is hereby granted, free of charge, to any person obtaining a copy 9 : : * of this software and associated documentation files (the "Software"), to deal 10 : : * in the Software without restriction, including without limitation the rights 11 : : * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 12 : : * copies of the Software, and to permit persons to whom the Software is 13 : : * furnished to do so, subject to the following conditions: 14 : : * 15 : : * The above copyright notice and this permission notice shall be included in 16 : : * all copies or substantial portions of the Software. 17 : : * 18 : : * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 : : * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 : : * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 21 : : * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 22 : : * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 23 : : * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 24 : : * THE SOFTWARE. 25 : : */ 26 : : 27 : : #include "py/mpstate.h" 28 : : 29 : : #if !MICROPY_NLR_SETJMP 30 : : // When not using setjmp, nlr_push_tail is called from inline asm so needs special care 31 : : #if MICROPY_NLR_X86 && MICROPY_NLR_OS_WINDOWS 32 : : // On these 32-bit platforms make sure nlr_push_tail doesn't have a leading underscore 33 : : unsigned int nlr_push_tail(nlr_buf_t *nlr) asm ("nlr_push_tail"); 34 : : #else 35 : : // LTO can't see inside inline asm functions so explicitly mark nlr_push_tail as used 36 : : __attribute__((used)) unsigned int nlr_push_tail(nlr_buf_t *nlr); 37 : : #endif 38 : : #endif 39 : : 40 : 8505216 : unsigned int nlr_push_tail(nlr_buf_t *nlr) { 41 : 8505216 : nlr_buf_t **top = &MP_STATE_THREAD(nlr_top); 42 : 8323510 : nlr->prev = *top; 43 : 8323510 : MP_NLR_SAVE_PYSTACK(nlr); 44 : 8323510 : *top = nlr; 45 : 8323510 : return 0; // normal return 46 : : } 47 : : 48 : 8443768 : void nlr_pop(void) { 49 : 8443768 : nlr_buf_t **top = &MP_STATE_THREAD(nlr_top); 50 : 8480974 : *top = (*top)->prev; 51 : 8480974 : } 52 : : 53 : : #if MICROPY_ENABLE_VM_ABORT 54 : : NORETURN void nlr_jump_abort(void) { 55 : : MP_STATE_THREAD(nlr_top) = MP_STATE_VM(nlr_abort); 56 : : nlr_jump(NULL); 57 : : } 58 : : #endif