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expression_with_stack: added a tweak on TCB stackpointers to avoid false trigger of stack overflow

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This commit is contained in:
Felipe Neves
2020-04-01 12:10:13 -03:00
committed by bot
parent a700035a85
commit 11f6addc61
3 changed files with 47 additions and 29 deletions
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19
components/xtensa/expression_with_stack_xtensa_asm.S
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@@ -14,9 +14,10 @@
#include <freertos/xtensa_context.h>
.extern shared_stack
.extern shared_stack_callback
.extern shared_stack_function_done
.extern xtensa_shared_stack
.extern xtensa_shared_stack_callback
.extern xtensa_shared_stack_function_done
.extern xtensa_shared_stack_env
.extern longjmp
.text
@@ -29,16 +30,18 @@
esp_shared_stack_invoke_function:
#ifndef __XTENSA_CALL0_ABI__
movi a0, 0 /* no need to rotate window, it will be destroyed anyway */
movi a6, shared_stack
movi a0, 0 /* must not rotate the window here, */
/* the state of execution for shared stack */
/* functions will be completely destroyed at end */
movi a6, xtensa_shared_stack
l32i sp, a6, 0 /* load shared stack pointer */
movi a12, shared_stack_callback
movi a12, xtensa_shared_stack_callback
l32i a12, a12, 0
callx4 a12 /* call user function */
movi a6, shared_stack_function_done
movi a6, xtensa_shared_stack_function_done
movi a7, 1
s32i a7, a6, 0 /* hint the function was finished */
movi a6, shared_stack_env
movi a6, xtensa_shared_stack_env
movi a7, 0
movi a12, longjmp
callx4 a12 /* jump to last clean state previously saved */