faff50d8e7
The ESF contains register file contents including program counter when the exception happened. If non-NULL and we have ARC_EXCEPTION_DEBUG enabled, dump its contents to the log stream. Other arches do this already. There is no need to read ERET, the ESF already contains the interrupted PC value. A future enhancement could create an option to additionally push callee-saved register context into the ESF so it can also be dumped out, but this patch does not address this. A future enhancement could also convert the syscall stack frame pointer passed to arch_syscall_oops() into an ESF so that context of the failed system call can be inferred. Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
/*
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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 Fatal fault handling
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*
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* This module implements the routines necessary for handling fatal faults on
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* ARCv2 CPUs.
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*/
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#include <kernel.h>
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#include <offsets_short.h>
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#include <arch/cpu.h>
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#include <logging/log.h>
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#include <kernel_arch_data.h>
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#include <arch/arc/v2/exc.h>
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LOG_MODULE_DECLARE(os);
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#ifdef CONFIG_ARC_EXCEPTION_DEBUG
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static void dump_arc_esf(const z_arch_esf_t *esf)
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{
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LOG_ERR(" r0: 0x%08x r1: 0x%08x r2: 0x%08x r3: 0x%08x",
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esf->r0, esf->r1, esf->r2, esf->r3);
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LOG_ERR(" r4: 0x%08x r5: 0x%08x r6: 0x%08x r7: 0x%08x",
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esf->r4, esf->r5, esf->r6, esf->r7);
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LOG_ERR(" r8: 0x%08x r9: 0x%08x r10: 0x%08x r11: 0x%08x",
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esf->r8, esf->r9, esf->r10, esf->r11);
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LOG_ERR("r12: 0x%08x r13: 0x%08x pc: 0x%08x",
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esf->r12, esf->r13, esf->pc);
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LOG_ERR(" blink: 0x%08x status32: 0x%08x", esf->blink, esf->status32);
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LOG_ERR("lp_end: 0x%08x lp_start: 0x%08x lp_count: 0x%08x",
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esf->lp_end, esf->lp_start, esf->lp_count);
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}
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#endif
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void z_arc_fatal_error(unsigned int reason, const z_arch_esf_t *esf)
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{
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#ifdef CONFIG_ARC_EXCEPTION_DEBUG
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if (esf != NULL) {
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dump_arc_esf(esf);
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}
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#endif /* CONFIG_ARC_EXCEPTION_DEBUG */
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z_fatal_error(reason, esf);
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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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/* TODO: convert ssf_ptr contents into an esf, they are not the same */
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ARG_UNUSED(ssf_ptr);
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z_arc_fatal_error(K_ERR_KERNEL_OOPS, NULL);
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CODE_UNREACHABLE;
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}
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FUNC_NORETURN void arch_system_halt(unsigned int reason)
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{
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ARG_UNUSED(reason);
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__asm__("brk");
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CODE_UNREACHABLE;
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}
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