112 lines
2.7 KiB
C
112 lines
2.7 KiB
C
/*
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* Copyright (C) 2016 YunOS Project. All rights reserved.
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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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*/
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#include <csi_config.h>
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#ifdef CONFIG_BACKTRACE
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#include <stdio.h>
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#include <stdlib.h>
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#include <backtrace.h>
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#define BT_SIZE 40
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void *g_bt_buffer[BT_SIZE];
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#define BT_STACK_SIZE 600
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int g_bt_stack[BT_STACK_SIZE / 4];
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char *g_dumpbuf = NULL;
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int g_dump_len = 0;
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int g_dump_max = 0;
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void dump_backtrace(void)
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{
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int i;
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int nptr;
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g_dump_len = 0;
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nptr = backtrace(g_bt_buffer, BT_SIZE);
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if (nptr <= 0) {
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printf("error: backtrace_symbols\n");
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return;
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}
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for (i = 0; i < nptr; i++) {
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if (g_dumpbuf == NULL) {
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printf("[<%p>]\n", g_bt_buffer[i]);
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} else {
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g_dump_len += snprintf(&g_dumpbuf[g_dump_len], g_dump_max - g_dump_len, "[<%p>]\n", g_bt_buffer[i]);
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if (g_dump_len >= g_dump_max) {
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printf("error, user buffer no space \n");
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return;
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}
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}
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}
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}
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void __attribute__((naked))csky_show_backtrace(void *stack)
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{
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asm volatile(
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"subi sp, 68\n\t"
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"stm r0-r13, (sp)\n\t"
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"mtcr sp, cr<14, 1>\n\t"
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"stw r15, (sp, 56)\n\t"
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"mov sp, %0\n\t"
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"lrw r0, g_bt_stack\n\t"
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"mov r1, sp\n\t"
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"sub r1, %1\n\t"
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"mov r2, %1\n\t"
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"mov r4, %1\n\t"
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"jbsr memcpy\n\t"
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"ldw r8, (sp, 32)\n\t"
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"ldw r15, (sp, 64)\n\t"
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"subi sp, 16\n\t"
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"stw r8, (sp, 0)\n\t"
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"stw r15, (sp, 4)\n\t"
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"mov r8, sp\n\t"
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"jbsr dump_backtrace\n\t"
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"addi sp, 16\n\t"
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"lrw r1, g_bt_stack\n\t"
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"mov r0, sp\n\t"
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"sub r0, r4\n\t"
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"mov r2, r4\n\t"
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"jbsr memcpy\n\t"
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"mfcr sp, cr<14, 1>\n\t"
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"ldw r15, (sp, 56)\n\t"
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"ldm r0-r13, (sp)\n\t"
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"addi sp, 68\n\t"
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"jmp r15\n\t"
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::"r"(stack), "r"(BT_STACK_SIZE):);
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}
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int csky_task_backtrace(void *stack, void *buf, int len)
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{
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g_dumpbuf = buf;
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g_dump_max = len;
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csky_show_backtrace(stack);
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return g_dump_len;
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}
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#endif
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