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169 lines
5.0 KiB
169 lines
5.0 KiB
/* |
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* Copyright (c) 2014 Wind River Systems, Inc. |
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* |
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* SPDX-License-Identifier: Apache-2.0 |
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*/ |
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/** |
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* @file |
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* @brief Kernel fatal error handler for ARM Cortex-M and Cortex-R |
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* |
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* This module provides the z_arm_fatal_error() routine for ARM Cortex-M |
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* and Cortex-R CPUs. |
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*/ |
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#include <zephyr/kernel.h> |
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#include <kernel_arch_data.h> |
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#include <zephyr/logging/log.h> |
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LOG_MODULE_DECLARE(os, CONFIG_KERNEL_LOG_LEVEL); |
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#ifdef CONFIG_EXCEPTION_DEBUG |
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static void esf_dump(const struct arch_esf *esf) |
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{ |
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LOG_ERR("r0/a1: 0x%08x r1/a2: 0x%08x r2/a3: 0x%08x", |
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esf->basic.a1, esf->basic.a2, esf->basic.a3); |
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LOG_ERR("r3/a4: 0x%08x r12/ip: 0x%08x r14/lr: 0x%08x", |
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esf->basic.a4, esf->basic.ip, esf->basic.lr); |
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LOG_ERR(" xpsr: 0x%08x", esf->basic.xpsr); |
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#if defined(CONFIG_FPU) && defined(CONFIG_FPU_SHARING) |
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for (int i = 0; i < ARRAY_SIZE(esf->fpu.s); i += 4) { |
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LOG_ERR("s[%2d]: 0x%08x s[%2d]: 0x%08x" |
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" s[%2d]: 0x%08x s[%2d]: 0x%08x", |
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i, (uint32_t)esf->fpu.s[i], |
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i + 1, (uint32_t)esf->fpu.s[i + 1], |
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i + 2, (uint32_t)esf->fpu.s[i + 2], |
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i + 3, (uint32_t)esf->fpu.s[i + 3]); |
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} |
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#ifdef CONFIG_VFP_FEATURE_REGS_S64_D32 |
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for (int i = 0; i < ARRAY_SIZE(esf->fpu.d); i += 4) { |
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LOG_ERR("d[%2d]: 0x%16llx d[%2d]: 0x%16llx" |
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" d[%2d]: 0x%16llx d[%2d]: 0x%16llx", |
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i, (uint64_t)esf->fpu.d[i], |
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i + 1, (uint64_t)esf->fpu.d[i + 1], |
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i + 2, (uint64_t)esf->fpu.d[i + 2], |
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i + 3, (uint64_t)esf->fpu.d[i + 3]); |
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} |
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#endif |
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LOG_ERR("fpscr: 0x%08x", esf->fpu.fpscr); |
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#endif |
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#if defined(CONFIG_EXTRA_EXCEPTION_INFO) |
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const struct _callee_saved *callee = esf->extra_info.callee; |
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if (callee != NULL) { |
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LOG_ERR("r4/v1: 0x%08x r5/v2: 0x%08x r6/v3: 0x%08x", |
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callee->v1, callee->v2, callee->v3); |
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LOG_ERR("r7/v4: 0x%08x r8/v5: 0x%08x r9/v6: 0x%08x", |
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callee->v4, callee->v5, callee->v6); |
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LOG_ERR("r10/v7: 0x%08x r11/v8: 0x%08x psp: 0x%08x", |
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callee->v7, callee->v8, callee->psp); |
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} |
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LOG_ERR("EXC_RETURN: 0x%0x", esf->extra_info.exc_return); |
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#endif /* CONFIG_EXTRA_EXCEPTION_INFO */ |
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LOG_ERR("Faulting instruction address (r15/pc): 0x%08x", |
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esf->basic.pc); |
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} |
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#endif /* CONFIG_EXCEPTION_DEBUG */ |
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void z_arm_fatal_error(unsigned int reason, const struct arch_esf *esf) |
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{ |
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#ifdef CONFIG_EXCEPTION_DEBUG |
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if (esf != NULL) { |
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esf_dump(esf); |
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} |
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#endif /* CONFIG_EXCEPTION_DEBUG */ |
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/* LOG the IRQn that was unhandled */ |
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#if defined(CONFIG_CPU_CORTEX_M) |
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if (reason == K_ERR_SPURIOUS_IRQ) { |
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uint32_t irqn = __get_IPSR() - 16; |
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LOG_ERR("Unhandled IRQn: %d", irqn); |
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} |
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#endif |
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z_fatal_error(reason, esf); |
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} |
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/** |
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* @brief Handle a software-generated fatal exception |
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* (e.g. kernel oops, panic, etc.). |
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* |
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* Notes: |
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* - the function is invoked in SVC Handler |
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* - if triggered from nPRIV mode, only oops and stack fail error reasons |
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* may be propagated to the fault handling process. |
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* - We expect the supplied exception stack frame to always be a valid |
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* frame. That is because, if the ESF cannot be stacked during an SVC, |
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* a processor fault (e.g. stacking error) will be generated, and the |
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* fault handler will executed instead of the SVC. |
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* |
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* @param esf exception frame |
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* @param callee_regs Callee-saved registers (R4-R11) |
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* @param exc_return EXC_RETURN value present in LR after exception entry. |
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*/ |
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void z_do_kernel_oops(const struct arch_esf *esf, _callee_saved_t *callee_regs, uint32_t exc_return) |
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{ |
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#if !(defined(CONFIG_EXTRA_EXCEPTION_INFO) && defined(CONFIG_ARMV7_M_ARMV8_M_MAINLINE)) |
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ARG_UNUSED(callee_regs); |
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#endif |
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/* Stacked R0 holds the exception reason. */ |
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unsigned int reason = esf->basic.r0; |
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z_arm_set_fault_sp(esf, exc_return); |
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#if defined(CONFIG_USERSPACE) |
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if (z_arm_preempted_thread_in_user_mode(esf)) { |
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/* |
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* Exception triggered from user mode. |
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* |
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* User mode is only allowed to induce oopses and stack check |
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* failures via software-triggered system fatal exceptions. |
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*/ |
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if (!((esf->basic.r0 == K_ERR_KERNEL_OOPS) || |
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(esf->basic.r0 == K_ERR_STACK_CHK_FAIL))) { |
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reason = K_ERR_KERNEL_OOPS; |
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} |
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} |
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#endif /* CONFIG_USERSPACE */ |
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#if !defined(CONFIG_EXTRA_EXCEPTION_INFO) |
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z_arm_fatal_error(reason, esf); |
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#else |
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struct arch_esf esf_copy; |
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memcpy(&esf_copy, esf, offsetof(struct arch_esf, extra_info)); |
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#if defined(CONFIG_ARMV7_M_ARMV8_M_MAINLINE) |
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/* extra exception info is collected in callee_reg param |
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* on CONFIG_ARMV7_M_ARMV8_M_MAINLINE |
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*/ |
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esf_copy.extra_info = (struct __extra_esf_info) { |
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.callee = callee_regs, |
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}; |
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#else |
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/* extra exception info is not collected for kernel oops |
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* path today so we make a copy of the ESF and zero out |
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* that information |
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*/ |
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esf_copy.extra_info = (struct __extra_esf_info) { 0 }; |
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#endif /* CONFIG_ARMV7_M_ARMV8_M_MAINLINE */ |
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z_arm_fatal_error(reason, &esf_copy); |
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#endif /* CONFIG_EXTRA_EXCEPTION_INFO */ |
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} |
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FUNC_NORETURN void arch_syscall_oops(void *ssf_ptr) |
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{ |
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uint32_t *ssf_contents = ssf_ptr; |
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struct arch_esf oops_esf = { 0 }; |
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/* TODO: Copy the rest of the register set out of ssf_ptr */ |
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oops_esf.basic.pc = ssf_contents[3]; |
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z_arm_fatal_error(K_ERR_KERNEL_OOPS, &oops_esf); |
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CODE_UNREACHABLE; |
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}
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