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https://github.com/AsahiLinux/u-boot
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95107b7c02
Don't do a stack dump if the stack pointer is outside the memory area reserved for stack. Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
121 lines
3.6 KiB
C
121 lines
3.6 KiB
C
/*
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* Copyright (C) 2005-2006 Atmel Corporation
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/sysreg.h>
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#include <asm/ptrace.h>
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DECLARE_GLOBAL_DATA_PTR;
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static const char * const cpu_modes[8] = {
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"Application", "Supervisor", "Interrupt level 0", "Interrupt level 1",
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"Interrupt level 2", "Interrupt level 3", "Exception", "NMI"
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};
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static void dump_mem(const char *str, unsigned long bottom, unsigned long top)
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{
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unsigned long p;
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int i;
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printf("%s(0x%08lx to 0x%08lx)\n", str, bottom, top);
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for (p = bottom & ~31; p < top; ) {
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printf("%04lx: ", p & 0xffff);
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for (i = 0; i < 8; i++, p += 4) {
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unsigned int val;
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if (p < bottom || p >= top)
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printf(" ");
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else {
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val = *(unsigned long *)p;
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printf("%08x ", val);
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}
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}
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printf("\n");
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}
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}
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void do_unknown_exception(unsigned int ecr, struct pt_regs *regs)
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{
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unsigned int mode;
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printf("\n *** Unhandled exception %u at PC=0x%08lx\n", ecr, regs->pc);
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switch (ecr) {
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case ECR_BUS_ERROR_WRITE:
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case ECR_BUS_ERROR_READ:
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printf("Bus error at address 0x%08lx\n",
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sysreg_read(BEAR));
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break;
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case ECR_TLB_MULTIPLE:
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case ECR_ADDR_ALIGN_X:
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case ECR_PROTECTION_X:
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case ECR_ADDR_ALIGN_R:
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case ECR_ADDR_ALIGN_W:
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case ECR_PROTECTION_R:
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case ECR_PROTECTION_W:
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case ECR_DTLB_MODIFIED:
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case ECR_TLB_MISS_X:
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case ECR_TLB_MISS_R:
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case ECR_TLB_MISS_W:
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printf("MMU exception at address 0x%08lx\n",
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sysreg_read(TLBEAR));
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break;
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}
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printf(" pc: %08lx lr: %08lx sp: %08lx r12: %08lx\n",
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regs->pc, regs->lr, regs->sp, regs->r12);
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printf(" r11: %08lx r10: %08lx r9: %08lx r8: %08lx\n",
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regs->r11, regs->r10, regs->r9, regs->r8);
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printf(" r7: %08lx r6: %08lx r5: %08lx r4: %08lx\n",
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regs->r7, regs->r6, regs->r5, regs->r4);
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printf(" r3: %08lx r2: %08lx r1: %08lx r0: %08lx\n",
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regs->r3, regs->r2, regs->r1, regs->r0);
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printf("Flags: %c%c%c%c%c\n",
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regs->sr & SR_Q ? 'Q' : 'q',
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regs->sr & SR_V ? 'V' : 'v',
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regs->sr & SR_N ? 'N' : 'n',
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regs->sr & SR_Z ? 'Z' : 'z',
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regs->sr & SR_C ? 'C' : 'c');
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printf("Mode bits: %c%c%c%c%c%c%c%c%c\n",
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regs->sr & SR_H ? 'H' : 'h',
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regs->sr & SR_R ? 'R' : 'r',
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regs->sr & SR_J ? 'J' : 'j',
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regs->sr & SR_EM ? 'E' : 'e',
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regs->sr & SR_I3M ? '3' : '.',
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regs->sr & SR_I2M ? '2' : '.',
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regs->sr & SR_I1M ? '1' : '.',
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regs->sr & SR_I0M ? '0' : '.',
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regs->sr & SR_GM ? 'G' : 'g');
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mode = (regs->sr >> SYSREG_M0_OFFSET) & 7;
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printf("CPU Mode: %s\n", cpu_modes[mode]);
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/* Avoid exception loops */
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if (regs->sp < (gd->stack_end - CONFIG_STACKSIZE)
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|| regs->sp >= gd->stack_end)
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printf("\nStack pointer seems bogus, won't do stack dump\n");
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else
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dump_mem("\nStack: ", regs->sp, gd->stack_end);
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panic("Unhandled exception\n");
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}
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