Add a cool register dump thing to the breakpoint exception handler

exception.asm

@@ -23,13 +23,548 @@ system_page_fault_handler:
 system_page_fault_str: data.str "Page fault at virtual address r1" data.8 10 data.8 0
 
 ; called upon execution of a `brk` instruction
+; ensure the stack has at least 256 bytes of free space before triggering this exception!!
+; this code is extremely ugly, but it works :P
 system_breakpoint_handler:
     add rsp, 4
+
+    ; push all registers once to save them
+    push r31
+    push r30
+    push r29
+    push r28
+    push r27
+    push r26
+    push r25
+    push r24
+    push r23
+    push r22
+    push r21
+    push r20
+    push r19
+    push r18
+    push r17
+    push r16
+    push r15
+    push r14
+    push r13
+    push r12
+    push r11
+    push r10
+    push r9
+    push r8
+    push r7
+    push r6
+    push r5
+    push r4
+    push r3
+    push r2
+    push r1
+    push r0
+
+    ; then push all registers again so they can be popped one by one to print to the monitor
+    push r31
+    push r30
+    push r29
+    push r28
+    push r27
+    push r26
+    push r25
+    push r24
+    push r23
+    push r22
+    push r21
+    push r20
+    push r19
+    push r18
+    push r17
+    push r16
+    push r15
+    push r14
+    push r13
+    push r12
+    push r11
+    push r10
+    push r9
+    push r8
+    push r7
+    push r6
+    push r5
+    push r4
+    push r3
+    push r2
+    push r1
     push r0
 
     mov r0, system_breakpoint_str
     call debug_print
+    call print_string_to_monitor
+
+    ; r0
+    mov r0, system_breakpoint_r0_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r1
+    mov r0, system_breakpoint_r1_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r2
+    mov r0, system_breakpoint_r2_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r3
+    mov r0, system_breakpoint_r3_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    ; ---
+    mov r0, 10
+    call print_character_to_monitor
+    ; ---
+
+    ; r4
+    mov r0, system_breakpoint_r4_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r5
+    mov r0, system_breakpoint_r5_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r6
+    mov r0, system_breakpoint_r6_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r7
+    mov r0, system_breakpoint_r7_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    ; ---
+    mov r0, 10
+    call print_character_to_monitor
+    ; ---
+
+    ; r8
+    mov r0, system_breakpoint_r8_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r9
+    mov r0, system_breakpoint_r9_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r10
+    mov r0, system_breakpoint_r10_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r11
+    mov r0, system_breakpoint_r11_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    ; ---
+    mov r0, 10
+    call print_character_to_monitor
+    ; ---
+
+    ; r12
+    mov r0, system_breakpoint_r12_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r13
+    mov r0, system_breakpoint_r13_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r14
+    mov r0, system_breakpoint_r14_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r15
+    mov r0, system_breakpoint_r15_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    ; ---
+    mov r0, 10
+    call print_character_to_monitor
+    ; ---
+
+    ; r16
+    mov r0, system_breakpoint_r16_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r17
+    mov r0, system_breakpoint_r17_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r18
+    mov r0, system_breakpoint_r18_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r19
+    mov r0, system_breakpoint_r19_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    ; ---
+    mov r0, 10
+    call print_character_to_monitor
+    ; ---
+
+    ; r20
+    mov r0, system_breakpoint_r20_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r21
+    mov r0, system_breakpoint_r21_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r22
+    mov r0, system_breakpoint_r22_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r23
+    mov r0, system_breakpoint_r23_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    ; ---
+    mov r0, 10
+    call print_character_to_monitor
+    ; ---
+
+    ; r24
+    mov r0, system_breakpoint_r24_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r25
+    mov r0, system_breakpoint_r25_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r26
+    mov r0, system_breakpoint_r26_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r27
+    mov r0, system_breakpoint_r27_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    ; ---
+    mov r0, 10
+    call print_character_to_monitor
+    ; ---
+
+    ; r28
+    mov r0, system_breakpoint_r28_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r29
+    mov r0, system_breakpoint_r29_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r30
+    mov r0, system_breakpoint_r30_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    mov r0, ' '
+    call print_character_to_monitor
+    mov r0, '|'
+    call print_character_to_monitor
+    mov r0, ' '
+    call print_character_to_monitor
+
+    ; r31
+    mov r0, system_breakpoint_r31_str
+    call print_string_to_monitor
+    pop r0
+    call print_hex_word_to_monitor
+
+    ; ---
+    mov r0, 10
+    call print_character_to_monitor
+    ; ---
+
+    call invoke_monitor
 
     pop r0
+    pop r1
+    pop r2
+    pop r3
+    pop r4
+    pop r5
+    pop r6
+    pop r7
+    pop r8
+    pop r9
+    pop r10
+    pop r11
+    pop r12
+    pop r13
+    pop r14
+    pop r15
+    pop r16
+    pop r17
+    pop r18
+    pop r19
+    pop r20
+    pop r21
+    pop r22
+    pop r23
+    pop r24
+    pop r25
+    pop r26
+    pop r27
+    pop r28
+    pop r29
+    pop r30
+    pop r31
     reti
-system_breakpoint_str: data.str "Breakpoint reached!" data.8 10 data.8 0
+system_breakpoint_str:     data.str "Breakpoint reached!" data.8 10 data.8 0
+system_breakpoint_r0_str:  data.str "r0:  " data.8 0
+system_breakpoint_r1_str:  data.str "r1:  " data.8 0
+system_breakpoint_r2_str:  data.str "r2:  " data.8 0
+system_breakpoint_r3_str:  data.str "r3:  " data.8 0
+system_breakpoint_r4_str:  data.str "r4:  " data.8 0
+system_breakpoint_r5_str:  data.str "r5:  " data.8 0
+system_breakpoint_r6_str:  data.str "r6:  " data.8 0
+system_breakpoint_r7_str:  data.str "r7:  " data.8 0
+system_breakpoint_r8_str:  data.str "r8:  " data.8 0
+system_breakpoint_r9_str:  data.str "r9:  " data.8 0
+system_breakpoint_r10_str: data.str "r10: " data.8 0
+system_breakpoint_r11_str: data.str "r11: " data.8 0
+system_breakpoint_r12_str: data.str "r12: " data.8 0
+system_breakpoint_r13_str: data.str "r13: " data.8 0
+system_breakpoint_r14_str: data.str "r14: " data.8 0
+system_breakpoint_r15_str: data.str "r15: " data.8 0
+system_breakpoint_r16_str: data.str "r16: " data.8 0
+system_breakpoint_r17_str: data.str "r17: " data.8 0
+system_breakpoint_r18_str: data.str "r18: " data.8 0
+system_breakpoint_r19_str: data.str "r19: " data.8 0
+system_breakpoint_r20_str: data.str "r20: " data.8 0
+system_breakpoint_r21_str: data.str "r21: " data.8 0
+system_breakpoint_r22_str: data.str "r22: " data.8 0
+system_breakpoint_r23_str: data.str "r23: " data.8 0
+system_breakpoint_r24_str: data.str "r24: " data.8 0
+system_breakpoint_r25_str: data.str "r25: " data.8 0
+system_breakpoint_r26_str: data.str "r26: " data.8 0
+system_breakpoint_r27_str: data.str "r27: " data.8 0
+system_breakpoint_r28_str: data.str "r28: " data.8 0
+system_breakpoint_r29_str: data.str "r29: " data.8 0
+system_breakpoint_r30_str: data.str "r30: " data.8 0
+system_breakpoint_r31_str: data.str "r31: " data.8 0

panic.asm

@@ -6,12 +6,13 @@
 ; outputs:
 ; none, does not return
 panic:
+    push r0
     cmp r0, 0
     ifz mov r0, panic_string
     call debug_print
     call print_string_to_monitor
-    call redraw_monitor_console
+    pop r0
-    call invoke_monitor
+    brk
     rjmp 0
 
 panic_string: data.str "Unspecified panic occurred!" data.8 10 data.8 0