117 lines
2.9 KiB
C
117 lines
2.9 KiB
C
/*
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mini - a Free Software replacement for the Nintendo/BroadOn IOS.
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exception handling
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Copyright (C) 2008, 2009 Hector Martin "marcan" <marcan@marcansoft.com>
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Copyright (C) 2008, 2009 Haxx Enterprises <bushing@gmail.com>
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# This code is licensed to you under the terms of the GNU GPL, version 2;
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# see file COPYING or http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
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*/
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#include "irq.h"
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#include "hollywood.h"
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#include "gecko.h"
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#include "utils.h"
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#include "ipc.h"
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#include "memory.h"
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#include "panic.h"
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const char *exceptions[] = {
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"RESET", "UNDEFINED INSTR", "SWI", "INSTR ABORT", "DATA ABORT",
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"RESERVED", "IRQ", "FIQ", "(unknown exception type)"
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};
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const char *aborts[] = {
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"UNDEFINED",
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"Alignment",
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"UNDEFINED",
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"Alignment",
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"UNDEFINED",
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"Translation",
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"UNDEFINED",
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"Translation",
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"External abort",
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"Domain",
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"External abort",
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"Domain",
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"External abort on translation (first level)",
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"Permission",
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"External abort on translation (second level)",
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"Permission"
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};
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u8 domvalid[] = {0,0,0,0,0,0,0,1,0,1,0,1,0,1,1,1};
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void exc_setup_stack(void);
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void exception_initialize(void)
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{
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exc_setup_stack();
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u32 cr = get_cr();
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cr |= 0x2; // Data alignment fault checking enable
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set_cr(cr);
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}
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void exc_handler(u32 type, u32 spsr, u32 *regs)
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{
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(void) spsr;
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if (type > 8) type = 8;
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gecko_printf("\nException %d (%s):\n", type, exceptions[type]);
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u32 pc, fsr;
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switch(type) {
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case 1: // UND
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case 2: // SWI
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case 3: // INSTR ABORT
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case 7: // FIQ
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pc = regs[15] - 4;
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break;
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case 4: // DATA ABORT
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pc = regs[15] - 8;
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break;
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default:
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pc = regs[15];
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break;
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}
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gecko_printf("Registers (%p):\n", regs);
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gecko_printf(" R0-R3: %08x %08x %08x %08x\n", regs[0], regs[1], regs[2], regs[3]);
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gecko_printf(" R4-R7: %08x %08x %08x %08x\n", regs[4], regs[5], regs[6], regs[7]);
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gecko_printf(" R8-R11: %08x %08x %08x %08x\n", regs[8], regs[9], regs[10], regs[11]);
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gecko_printf("R12-R15: %08x %08x %08x %08x\n", regs[12], regs[13], regs[14], pc);
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gecko_printf("SPSR: %08x\n", spsr);
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gecko_printf("CPSR: %08x\n", get_cpsr());
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gecko_printf("CR: %08x\n", get_cr());
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gecko_printf("TTBR: %08x\n", get_ttbr());
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gecko_printf("DACR: %08x\n", get_dacr());
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switch (type) {
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case 3: // INSTR ABORT
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case 4: // DATA ABORT
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if(type == 3)
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fsr = get_ifsr();
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else
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fsr = get_dfsr();
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gecko_printf("Abort type: %s\n", aborts[fsr&0xf]);
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if(domvalid[fsr&0xf])
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gecko_printf("Domain: %d\n", (fsr>>4)&0xf);
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if(type == 4)
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gecko_printf("Address: 0x%08x\n", get_far());
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break;
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default: break;
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}
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if(type != 3) {
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gecko_printf("Code dump:\n");
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gecko_printf("%08x: %08x %08x %08x %08x\n", pc-16, read32(pc-16), read32(pc-12), read32(pc-8), read32(pc-4));
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gecko_printf("%08x: *%08x %08x %08x %08x\n", pc, read32(pc), read32(pc+4), read32(pc+8), read32(pc+12));
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gecko_printf("%08x: %08x %08x %08x %08x\n", pc+16, read32(pc+16), read32(pc+20), read32(pc+24), read32(pc+28));
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}
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panic2(0, PANIC_EXCEPTION);
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}
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