#include <lib/stdio.h>
#include <lib/string.h>
#include <lib/regfunc.h>
+#include <lib/tinyprintf.h>
/*
* These values are pushed on the stack just before
"BUS FAULT",
"USAGE FAULT",
"RESERVED",
+ "RESERVED",
+ "RESERVED",
+ "RESERVED",
"SVC",
"DEBUG MONITOR",
"RESERVED",
if (intnr < 20) // TODO: strlen
return messages[intnr];
- return NULL;
+
+return "UNKNOWN";
}
void ivt_set_gate(unsigned char num, void * isr(), short pri) {
ivt[num] = (uint32_t) isr;
- *NVIC_ISER0 = (1 << ((uint32_t)(num) & 0x1F));
+// if (num <= 32)
+// *NVIC_ISER0 = (1 << ((uint32_t)(num) & 0x1F));
/* TODO: Priorities */
}
/* Dummy interrupt: comment out the comment to use a naked
* function */
-// __attribute__ ((interrupt))
-void * dummy_isr(/* struct interrupt_frame * frame */) {
+struct interrupt_frame * frame;
- uint8_t nr = *SCB_VTOR_ST & 0xFF;
+//__attribute__ ((interrupt))
+void * dummy_isr( struct interrupt_frame * f ) {
+
+ //uint32_t link_register = 0;
+ //asm ("mov %0, #33" : "=r" (lp));
- cputs("EXCEPTION: ");
- cputs(exception_message(nr));
- cputs("\nSYSTEM HALTED\n");
+ /* Check Link Register:
+ * If you ever need to debug these: here are the most common
+ * values
+ * 0xFFFFFFF1: return to handler mode (nested interrupts
+ * 0xFFFFFFF9: return to thread mode using main stack
+ * 0xFFFFFFFD: return to thread mode using process stack */
+ // asm ("mov %0, lr" : "=r" (link_register));
+ // printf("%x\n", link_register);
+ // for(;;);
+
+// asm volatile ("push {r0-r12}");
+// int * stack;
+// asm volatile ("tst lr, #4" "\n\t"
+// "ite eq" "\n\t"
+// "mrseq %0, msp" "\n\t"
+// "mrsne r0, psp" : "=r" (stack));
+//
+// printf("STACK: %x, %x, %x, %x, %x", stack[32], stack[28], stack[24], stack[20], stack[16]);
+
+// asm volatile ("CPSID f");
+
+// uint32_t tmp = args[0];
+// uint32_t tmp2 = args[1];
+// printf("%x, %x\n", tmp, tmp2);
+// uint32_t tmp3 = args[2];
+// uint32_t tmp4 = args[3];
+// printf("%x, %x\n", tmp3, tmp4);
+
+ struct interrupt_frame * frame = (struct interrupt_frame * )kalloc(get_kheap());
+ memcpy(frame, f, sizeof(struct interrupt_frame));
+
+ uint8_t nr = *SCB_VTOR_ST & 0xFF;
+ printf("EXCEPTION: %s\n", exception_message(nr));
+ printf("STACK TRACE:\n");
+ printf("R0:%p\n",frame->r0);
+ printf("R1:%p\n",frame->r1);
+ printf("R2:%p\n",frame->r2);
+ printf("R3:%p\n",frame->r3);
+ printf("R12:%p\n",frame->r12);
+ printf("LR:%p\n",frame->lr);
+ printf("PC:%p\n",frame->pc);
+ printf("PSR:%p\n",frame->psr);
- for(;;);
+ for(;;);
}
/* Initialize interrupt vector */
* relocated to other memory locations. We can do this by setting
* a register in the NVIC called the vector table offset register */
- regw_u32(SCB_VTOR, (uint32_t) &ivt, 0, OWRITE);
+ rwrite(SCB_VTOR, (uint32_t) &ivt);
}