52 lines
2.1 KiB
C
52 lines
2.1 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* SPDX-FileCopyrightText: Copyright (c) 2013-2017 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "py/mpstate.h"
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#if !MICROPY_NLR_SETJMP
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// When not using setjmp, nlr_push_tail is called from inline asm so needs special care
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#if defined(MICROPY_NLR_X86) && MICROPY_NLR_X86 && defined(MICROPY_NLR_OS_WINDOWS) && MICROPY_NLR_OS_WINDOWS
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// On these 32-bit platforms make sure nlr_push_tail doesn't have a leading underscore
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unsigned int nlr_push_tail(nlr_buf_t *nlr) asm("nlr_push_tail");
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#else
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// LTO can't see inside inline asm functions so explicitly mark nlr_push_tail as used
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__attribute__((used)) unsigned int nlr_push_tail(nlr_buf_t *nlr);
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#endif
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#endif
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unsigned int nlr_push_tail(nlr_buf_t *nlr) {
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nlr_buf_t **top = &MP_STATE_THREAD(nlr_top);
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nlr->prev = *top;
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MP_NLR_SAVE_PYSTACK(nlr);
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*top = nlr;
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return 0; // normal return
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}
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void nlr_pop(void) {
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nlr_buf_t **top = &MP_STATE_THREAD(nlr_top);
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*top = (*top)->prev;
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}
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