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Stage2: Add exception handlers

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TuxSH 2018-05-21 03:50:53 +02:00
parent c1687905a3
commit bf2c6dff25
5 changed files with 195 additions and 5 deletions
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64
fusee/fusee-secondary/src/exception_handlers.c Normal file
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#include <inttypes.h>
#include "exception_handlers.h"
#include "lib/driver_utils.h"
#include "utils.h"
#include "display/video_fb.h"
#define CODE_DUMP_SIZE 0x30
#define STACK_DUMP_SIZE 0x60
extern const uint32_t exception_handler_table[];
static const char *exception_names[] = {
"Reset", "Undefined instruction", "SWI", "Prefetch abort", "Data abort", "Reserved", "IRQ", "FIQ",
};
static const char *register_names[] = {
"R0", "R1", "R2", "R3", "R4", "R5", "R6", "R7", "R8", "R9", "R10", "R11", "R12",
"SP", "LR", "PC", "CPSR",
};
void setup_exception_handlers(void) {
volatile uint32_t *bpmp_exception_handler_table = (volatile uint32_t *)0x6000F200;
for (int i = 0; i < 8; i++) {
if (exception_handler_table[i] != 0) {
bpmp_exception_handler_table[i] = exception_handler_table[i];
}
}
}
void exception_handler_main(uint32_t *registers, unsigned int exception_type) {
uint8_t code_dump[CODE_DUMP_SIZE];
uint8_t stack_dump[STACK_DUMP_SIZE];
size_t code_dump_size;
size_t stack_dump_size;
uint32_t pc = registers[15];
uint32_t cpsr = registers[16];
uint32_t instr_addr = pc + ((cpsr & 0x20) ? 2 : 4) - CODE_DUMP_SIZE;
printk("\nSomething went wrong...\n");
code_dump_size = safecpy(code_dump, (const void *)instr_addr, CODE_DUMP_SIZE);
stack_dump_size = safecpy(stack_dump, (const void *)registers[13], STACK_DUMP_SIZE);
printk("\nException type: %s\n", exception_names[exception_type]);
printk("\nRegisters:\n\n");
/* Print r0 to pc. */
for (int i = 0; i < 16; i += 2) {
printk("%-7s%08"PRIX32" %-7s%08"PRIX32"\n", register_names[i], registers[i], register_names[i+1], registers[i+1]);
}
/* Print cpsr. */
printk("%-7s%08"PRIX32"\n", register_names[16], registers[16]);
printk("\nCode dump:\n");
hexdump(code_dump, code_dump_size, instr_addr);
printk("\nStack dump:\n");
hexdump(stack_dump, stack_dump_size, registers[13]);
printk("\n");
fatal_error("An exception occured!\n");
}