| 42,6 → 42,7 |
|---|
| #include <arch/mm/page_fault.h> |
| #include <print.h> |
| #include <syscall/syscall.h> |
| #include <udebug/udebug.h> |
| |
| /** Offset used in calculation of exception handler's relative address. |
| * |
| 291,6 → 292,30 |
|---|
| istate->r3, istate->r4, istate->r5, istate->r6); |
| } |
| |
| /** Data abort exception handler. |
| * |
| * Determines whether the exception was caused by a breakpoint |
| * instruction or a page fault. |
| */ |
| static void data_abort_exception(int exc_no, istate_t *istate) |
| { |
| uint32_t *instr_addr = (uint32_t *) istate->pc; |
| uint32_t opcode = *instr_addr; |
| |
| if ((opcode & 0xfff000f0) == 0xe1200070) { |
| /* Bkpt */ |
| if (istate_from_uspace(istate)) { |
| udebug_breakpoint_event(0); |
| } else { |
| panic("Unexpected BKPT instruction at 0x%x", |
| istate->pc); |
| } |
| } else { |
| /* Page fault */ |
| data_abort(exc_no, istate); |
| } |
| } |
| |
| /** Interrupt Exception handler. |
| * |
| * Determines the sources of interrupt and calls their handlers. |
| 355,7 → 380,8 |
|---|
| exc_register(EXC_IRQ, "interrupt", (iroutine) irq_exception); |
| exc_register(EXC_PREFETCH_ABORT, "prefetch abort", |
| (iroutine) prefetch_abort); |
| exc_register(EXC_DATA_ABORT, "data abort", (iroutine) data_abort); |
| exc_register(EXC_DATA_ABORT, "data abort", |
| (iroutine) data_abort_exception); |
| exc_register(EXC_SWI, "software interrupt", (iroutine) swi_exception); |
| } |
| |