/* * This file is part of the libpayload project. * * Copyright (C) 2014 Imagination Technologies * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc. */ #include <arch/exception.h> #include <exception.h> #include <libpayload.h> #include <stdint.h> u32 exception_stack[0x400] __attribute__((aligned(8))); struct exception_state_t exception_state; static const char *names[EXC_COUNT] = { [EXC_CACHE_ERROR] = "Cache error exception", [EXC_TLB_REFILL_AND_ALL] = "TLB refill or general exception", [EXC_INTERRUPT] = "Interrupt", [EXC_EJTAG_DEBUG] = "EJTAG debug exception" }; static void dump_exception_state(void) { printf("%s exception!\n", names[exception_state_ptr->vector]); printf("\nRegisters:\n"); printf("ZERO:\t0x%08x\n", exception_state_ptr->regs.zero); printf("AT:\t0x%08x\n", exception_state_ptr->regs.at); printf("V0:\t0x%08x\n", exception_state_ptr->regs.v0); printf("V1:\t0x%08x\n", exception_state_ptr->regs.v1); printf("A0:\t0x%08x\n", exception_state_ptr->regs.a0); printf("A1:\t0x%08x\n", exception_state_ptr->regs.a1); printf("A2:\t0x%08x\n", exception_state_ptr->regs.a2); printf("A3:\t0x%08x\n", exception_state_ptr->regs.a3); printf("T0:\t0x%08x\n", exception_state_ptr->regs.t0); printf("T1:\t0x%08x\n", exception_state_ptr->regs.t1); printf("T2:\t0x%08x\n", exception_state_ptr->regs.t2); printf("T3:\t0x%08x\n", exception_state_ptr->regs.t3); printf("T4:\t0x%08x\n", exception_state_ptr->regs.t4); printf("T5:\t0x%08x\n", exception_state_ptr->regs.t5); printf("T6:\t0x%08x\n", exception_state_ptr->regs.t6); printf("T7:\t0x%08x\n", exception_state_ptr->regs.t7); printf("S0:\t0x%08x\n", exception_state_ptr->regs.s0); printf("S1:\t0x%08x\n", exception_state_ptr->regs.s1); printf("S2:\t0x%08x\n", exception_state_ptr->regs.s2); printf("S3:\t0x%08x\n", exception_state_ptr->regs.s3); printf("S4:\t0x%08x\n", exception_state_ptr->regs.s4); printf("S5:\t0x%08x\n", exception_state_ptr->regs.s5); printf("S6:\t0x%08x\n", exception_state_ptr->regs.s6); printf("S7:\t0x%08x\n", exception_state_ptr->regs.s7); printf("T8:\t0x%08x\n", exception_state_ptr->regs.t8); printf("T9:\t0x%08x\n", exception_state_ptr->regs.t9); printf("K0:\t0x%08x\n", exception_state_ptr->regs.k0); printf("K1:\t0x%08x\n", exception_state_ptr->regs.k1); printf("GP:\t0x%08x\n", exception_state_ptr->regs.gp); printf("SP:\t0x%08x\n", exception_state_ptr->regs.sp); printf("FP:\t0x%08x\n", exception_state_ptr->regs.fp); printf("RA:\t0x%08x\n", exception_state_ptr->regs.ra); } static void dump_stack(uintptr_t addr, size_t bytes) { int i, j; const int words_per_line = 8; int words_to_print; uint32_t *ptr = (uint32_t *) (addr & ~(words_per_line * sizeof(*ptr) - 1)); printf("Dumping stack:\n"); words_to_print = bytes/sizeof(*ptr); for (i = words_to_print; i >= 0; i -= words_per_line) { printf("%p: ", ptr + i); for (j = i; j < i + words_per_line; j++) printf("%08x ", *(ptr + j)); printf("\n"); } } void exception_dispatch(void) { u32 vec = exception_state_ptr->vector; die_if(vec >= EXC_COUNT || !names[vec], "Bad exception vector %u", vec); dump_exception_state(); dump_stack(exception_state_ptr->regs.sp, 512); halt(); } void exception_init(void) { exception_stack_end = exception_stack + ARRAY_SIZE(exception_stack); exception_state_ptr = &exception_state; exception_init_asm(); }