43 lines
1.7 KiB
C
43 lines
1.7 KiB
C
// Copyright 2015-2019 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <esp_expression_with_stack.h>
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#include <freertos/xtensa_rtos.h>
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#include <freertos/xtensa_context.h>
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StackType_t * esp_switch_stack_setup(StackType_t *stack, size_t stack_size)
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{
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#if CONFIG_FREERTOS_WATCHPOINT_END_OF_STACK
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esp_clear_watchpoint(1);
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uint32_t watchpoint_place = ((uint32_t)stack + 32) & 0x1f ;
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#endif
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StackType_t *top_of_stack = (StackType_t *)&stack[0] +
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((stack_size * sizeof(StackType_t)) / sizeof(StackType_t));
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//Align stack to a 16byte boundary, as required by CPU specific:
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top_of_stack = (StackType_t *)(((UBaseType_t)(top_of_stack - 31) -
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ALIGNUP(0x10, sizeof(XtSolFrame) )) &
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~0xf);
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//Fake stack frame to do not break the backtrace
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XtSolFrame *frame = (XtSolFrame *)top_of_stack;
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frame->a0 = 0;
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frame->a1 = (UBaseType_t)top_of_stack;
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#if CONFIG_FREERTOS_WATCHPOINT_END_OF_STACK
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esp_set_watchpoint(1, (uint8_t *)watchpoint_place, 32, ESP_WATCHPOINT_STORE);
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#endif
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return top_of_stack;
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} |