/* * Copyright (c) 2006-2018, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes */ #include #ifdef RT_USING_SMART #include #define TRANCE_LEVEL 20 extern rt_ubase_t __text_start[]; extern rt_ubase_t __text_end[]; static char *_get_elf_name(size_t sepc); void rt_hw_backtrace(rt_uint32_t *ffp, rt_ubase_t sepc) { rt_ubase_t *ra; rt_ubase_t *fp; rt_ubase_t vas, vae; int i, j; rt_kprintf("riscv64-unknown-linux-musl-addr2line -e %s -a -f", _get_elf_name(sepc)); fp = (rt_ubase_t *)ffp; if (!fp) { asm volatile("mv %0, s0" : "=r"(fp)); } if (sepc) { rt_kprintf(" %p", sepc - 0x4); } if (fp > (rt_ubase_t *)USER_VADDR_START && fp < (rt_ubase_t *)USER_VADDR_TOP) { vas = USER_VADDR_START; vae = USER_VADDR_TOP; } else { vas = (rt_ubase_t)&__text_start; vae = (rt_ubase_t)&__text_end; } for (i = j = 0; i < TRANCE_LEVEL; i++) { if (RT_ALIGN((rt_ubase_t)fp, sizeof(void *)) != (rt_ubase_t)fp) { break; } ra = fp - 1; if (!_rt_kmem_v2p(ra) || *ra < vas || *ra > vae) break; rt_kprintf(" %p", *ra - 0x04); fp = fp - 2; if (!_rt_kmem_v2p(fp)) break; fp = (rt_ubase_t *)(*fp); if (!fp) break; } rt_kputs("\r\n"); } static void _assert_backtrace_cb(const char *ex, const char *func, rt_size_t line) { rt_hw_interrupt_disable(); rt_kprintf("(%s) assertion failed at function:%s, line number:%d \n", ex, func, line); rt_hw_backtrace(0, 0); rt_hw_cpu_shutdown(); } static int rt_hw_backtrace_init(void) { rt_assert_set_hook(_assert_backtrace_cb); return 0; } INIT_BOARD_EXPORT(rt_hw_backtrace_init); static void backtrace_test(int args, char *argv[]) { int *p = (void *)-1; init_fn_t ft = 0; if (args < 2) { rt_kprintf("backtrace_test usage:backtrace_test a(assert)/m(invalid memory)/i(illegal instruction)\r\n"); return; } if (!rt_strcmp(argv[1], "a")) { rt_kprintf("Assert test:\r\n", argv[1]); RT_ASSERT(0); } else if (!rt_strcmp(argv[1], "m")) { rt_kprintf("Access invalid memory:\r\n", argv[1]); *p = 0; } else if (!rt_strcmp(argv[1], "i")) { rt_kprintf("Illegal instruction:\r\n", argv[1]); ft(); } else { rt_kprintf("Unknown cmd :%s.\r\n", argv[1]); } } MSH_CMD_EXPORT(backtrace_test, backtrace test case); extern struct rt_thread *rt_current_thread; #define IN_USERSPACE (sepc > USER_VADDR_START && sepc < USER_VADDR_TOP) static char *_get_elf_name(size_t sepc) { return IN_USERSPACE ? rt_current_thread->name : "rtthread.elf"; } #endif /* RT_USING_SMART */