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zephyr/arch/xtensa/core/debug_helpers_asm.S

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arch: xtensa: Print backtrace from panic handler This change uses stack frame to print backtrace once exception occurs Printing backtrace helps to identify the cause of exception Signed-off-by: Shubham Kulkarni <shubham.kulkarni@espressif.com>
2021-01-07 14:11:11 +08:00
/*
* Copyright (c) 2020 Espressif Systems (Shanghai) Co., Ltd.
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <xtensa/coreasm.h>
#include <xtensa/corebits.h>
#include <xtensa/config/system.h>
#include <xtensa/hal.h>
xtensa: rename files with hyphens to underscores Simply to provide some consistencies on file naming under arch/xtensa. These are all internally used files and are not public. So there is no need to provide a deprecation path for them. Signed-off-by: Daniel Leung <daniel.leung@intel.com>
2023-12-07 05:42:05 +08:00
#include <xtensa_asm2_context.h>
arch: xtensa: Print backtrace from panic handler This change uses stack frame to print backtrace once exception occurs Printing backtrace helps to identify the cause of exception Signed-off-by: Shubham Kulkarni <shubham.kulkarni@espressif.com>
2021-01-07 14:11:11 +08:00
xtensa: add some structs for interrupt stack frames This adds some structs for interrupt stack frames to make it easier to access individual elements, and ultimately getting rid of magic array element numbers in the code. Hopefully, this would aid in debugging where you can view the whole struct in debugger. Signed-off-by: Daniel Leung <daniel.leung@intel.com>
2023-04-19 08:02:29 +08:00
#include <offsets.h>
arch: xtensa: Print backtrace from panic handler This change uses stack frame to print backtrace once exception occurs Printing backtrace helps to identify the cause of exception Signed-off-by: Shubham Kulkarni <shubham.kulkarni@espressif.com>
2021-01-07 14:11:11 +08:00
.section .iram1, "ax"
.align 4
.global z_xtensa_backtrace_get_start
.type z_xtensa_backtrace_get_start, @function
z_xtensa_backtrace_get_start:
entry a1, 32
/* Spill registers onto stack (excluding this function) */
call8 xthal_window_spill
/* a2, a3, a4 should be out arguments for i PC, i SP, i-1 PC respectively.
* Use a6 and a7 as scratch */
/* Load address for interrupted stack */
l32i a6, a5, 0
/* Load i PC in a7 */
xtensa: add some structs for interrupt stack frames This adds some structs for interrupt stack frames to make it easier to access individual elements, and ultimately getting rid of magic array element numbers in the code. Hopefully, this would aid in debugging where you can view the whole struct in debugger. Signed-off-by: Daniel Leung <daniel.leung@intel.com>
2023-04-19 08:02:29 +08:00
l32i a7, a6, ___xtensa_irq_bsa_t_pc_OFFSET
arch: xtensa: Print backtrace from panic handler This change uses stack frame to print backtrace once exception occurs Printing backtrace helps to identify the cause of exception Signed-off-by: Shubham Kulkarni <shubham.kulkarni@espressif.com>
2021-01-07 14:11:11 +08:00
/* Store value of i PC in a2 */
s32i a7, a2, 0
/* Load value for (i-1) PC, which return address of i into a7 */
xtensa: add some structs for interrupt stack frames This adds some structs for interrupt stack frames to make it easier to access individual elements, and ultimately getting rid of magic array element numbers in the code. Hopefully, this would aid in debugging where you can view the whole struct in debugger. Signed-off-by: Daniel Leung <daniel.leung@intel.com>
2023-04-19 08:02:29 +08:00
l32i a7, a6, ___xtensa_irq_bsa_t_a0_OFFSET
arch: xtensa: Print backtrace from panic handler This change uses stack frame to print backtrace once exception occurs Printing backtrace helps to identify the cause of exception Signed-off-by: Shubham Kulkarni <shubham.kulkarni@espressif.com>
2021-01-07 14:11:11 +08:00
/* Store value of (i-1) PC in a4 */
s32i a7, a4, 0
xtensa: add some structs for interrupt stack frames This adds some structs for interrupt stack frames to make it easier to access individual elements, and ultimately getting rid of magic array element numbers in the code. Hopefully, this would aid in debugging where you can view the whole struct in debugger. Signed-off-by: Daniel Leung <daniel.leung@intel.com>
2023-04-19 08:02:29 +08:00
/* Add base stack frame size in interrupted stack to get i SP */
addi a6, a6, ___xtensa_irq_bsa_t_SIZEOF
arch: xtensa: Print backtrace from panic handler This change uses stack frame to print backtrace once exception occurs Printing backtrace helps to identify the cause of exception Signed-off-by: Shubham Kulkarni <shubham.kulkarni@espressif.com>
2021-01-07 14:11:11 +08:00
/* Store i SP in a3 */
s32i a6, a3, 0
retw