144 lines
5.0 KiB
C
144 lines
5.0 KiB
C
/****************************************************************************
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* arch/arm/src/armv6-m/up_hardfault.c
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*
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* Copyright (C) 2013 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <string.h>
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#include <assert.h>
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#include <debug.h>
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#include <arch/irq.h>
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#include "up_arch.h"
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#include "nvic.h"
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#include "up_internal.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifdef CONFIG_DEBUG_HARDFAULT
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# define hfinfo(format, ...) _alert(format, ##__VA_ARGS__)
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#else
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# define hfinfo(x...)
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#endif
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#define INSN_SVC0 0xdf00 /* insn: svc 0 */
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_hardfault
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*
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* Description:
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* This is Hard Fault exception handler. It also catches SVC call
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* exceptions that are performed in bad contexts.
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*
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****************************************************************************/
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int up_hardfault(int irq, FAR void *context)
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{
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uint32_t *regs = (uint32_t *)context;
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/* Get the value of the program counter where the fault occurred */
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uint16_t *pc = (uint16_t *)regs[REG_PC] - 1;
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/* Check if the pc lies in known FLASH memory.
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* REVISIT: What if the PC lies in "unknown" external memory?
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*/
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#ifdef CONFIG_BUILD_PROTECTED
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/* In the kernel build, SVCalls are expected in either the base, kernel
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* FLASH region or in the user FLASH region.
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*/
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if (((uintptr_t)pc >= (uintptr_t)&_stext &&
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(uintptr_t)pc < (uintptr_t)&_etext) ||
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((uintptr_t)pc >= (uintptr_t)USERSPACE->us_textstart &&
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(uintptr_t)pc < (uintptr_t)USERSPACE->us_textend))
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#else
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/* SVCalls are expected only from the base, kernel FLASH region */
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if ((uintptr_t)pc >= (uintptr_t)&_stext &&
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(uintptr_t)pc < (uintptr_t)&_etext)
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#endif
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{
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/* Fetch the instruction that caused the Hard fault */
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uint16_t insn = *pc;
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hfinfo(" PC: %p INSN: %04x\n", pc, insn);
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/* If this was the instruction 'svc 0', then forward processing
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* to the SVCall handler
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*/
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if (insn == INSN_SVC0)
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{
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hfinfo("Forward SVCall\n");
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return up_svcall(irq, context);
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}
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}
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#if defined(CONFIG_DEBUG_HARDFAULT)
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/* Dump some hard fault info */
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_alert("\nHard Fault:\n");
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_alert(" IRQ: %d regs: %p\n", irq, regs);
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_alert(" PRIMASK: %08x IPSR: %08x\n",
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getprimask(), getipsr());
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_alert(" R0: %08x %08x %08x %08x %08x %08x %08x %08x\n",
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regs[REG_R0], regs[REG_R1], regs[REG_R2], regs[REG_R3],
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regs[REG_R4], regs[REG_R5], regs[REG_R6], regs[REG_R7]);
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_alert(" R8: %08x %08x %08x %08x %08x %08x %08x %08x\n",
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regs[REG_R8], regs[REG_R9], regs[REG_R10], regs[REG_R11],
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regs[REG_R12], regs[REG_R13], regs[REG_R14], regs[REG_R15]);
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_alert(" xPSR: %08x PRIMASK: %08x (saved)\n",
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CURRENT_REGS[REG_XPSR], CURRENT_REGS[REG_PRIMASK]);
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#endif
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(void)up_irq_save();
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_alert("PANIC!!! Hard fault\n");
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PANIC();
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return OK; /* Won't get here */
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}
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