You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
88 lines
3.2 KiB
88 lines
3.2 KiB
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2013-2023 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.
|
|
*/
|
|
|
|
#include "py/mpstate.h"
|
|
|
|
#if !MICROPY_NLR_SETJMP
|
|
// When not using setjmp, nlr_push_tail is called from inline asm so needs special care
|
|
#if MICROPY_NLR_X86 && MICROPY_NLR_OS_WINDOWS
|
|
// On these 32-bit platforms make sure nlr_push_tail doesn't have a leading underscore
|
|
unsigned int nlr_push_tail(nlr_buf_t *nlr) asm ("nlr_push_tail");
|
|
#else
|
|
// LTO can't see inside inline asm functions so explicitly mark nlr_push_tail as used
|
|
__attribute__((used)) unsigned int nlr_push_tail(nlr_buf_t *nlr);
|
|
#endif
|
|
#endif
|
|
|
|
unsigned int nlr_push_tail(nlr_buf_t *nlr) {
|
|
nlr_buf_t **top = &MP_STATE_THREAD(nlr_top);
|
|
nlr->prev = *top;
|
|
MP_NLR_SAVE_PYSTACK(nlr);
|
|
*top = nlr;
|
|
return 0; // normal return
|
|
}
|
|
|
|
void nlr_pop(void) {
|
|
nlr_buf_t **top = &MP_STATE_THREAD(nlr_top);
|
|
*top = (*top)->prev;
|
|
}
|
|
|
|
void nlr_push_jump_callback(nlr_jump_callback_node_t *node, nlr_jump_callback_fun_t fun) {
|
|
nlr_jump_callback_node_t **top = &MP_STATE_THREAD(nlr_jump_callback_top);
|
|
node->prev = *top;
|
|
node->fun = fun;
|
|
*top = node;
|
|
}
|
|
|
|
void nlr_pop_jump_callback(bool run_callback) {
|
|
nlr_jump_callback_node_t **top = &MP_STATE_THREAD(nlr_jump_callback_top);
|
|
nlr_jump_callback_node_t *cur = *top;
|
|
*top = (*top)->prev;
|
|
if (run_callback) {
|
|
cur->fun(cur);
|
|
}
|
|
}
|
|
|
|
// This function pops and runs all callbacks that were registered after `nlr`
|
|
// was pushed (via nlr_push). It assumes:
|
|
// - a descending C stack,
|
|
// - that all nlr_jump_callback_node_t's in the linked-list pointed to by
|
|
// nlr_jump_callback_top are on the C stack
|
|
// It works by popping each node in turn until the next node is NULL or above
|
|
// the `nlr` pointer on the C stack (and so pushed before `nlr` was pushed).
|
|
void nlr_call_jump_callbacks(nlr_buf_t *nlr) {
|
|
nlr_jump_callback_node_t **top = &MP_STATE_THREAD(nlr_jump_callback_top);
|
|
while (*top != NULL && (void *)*top < (void *)nlr) {
|
|
nlr_pop_jump_callback(true);
|
|
}
|
|
}
|
|
|
|
#if MICROPY_ENABLE_VM_ABORT
|
|
NORETURN void nlr_jump_abort(void) {
|
|
MP_STATE_THREAD(nlr_top) = MP_STATE_VM(nlr_abort);
|
|
nlr_jump(NULL);
|
|
}
|
|
#endif
|
|
|