Add ARM9 exception vectors feature from @TuxSH

source/config.c

@@ -24,7 +24,7 @@ void configureCFW(const char *configPath)
                                         "( ) Force A9LH detection",
                                         "( ) Use second EmuNAND as default",
                                         "( ) Enable region/language emulation",
-                                        "( ) Use developer UNITINFO",
+                                        "( ) Enable developer features",
                                         "( ) Show current NAND in System Settings",
                                         "( ) Show GBA boot screen in patched AGB_FIRM",
                                         "( ) Enable splash screen with no screen-init" };

source/exceptions.c

@@ -0,0 +1,38 @@
+/*
+*   exceptions.c
+*       by TuxSH
+*/
+
+#include "exceptions.h"
+#include "fs.h"
+#include "memory.h"
+#include "utils.h"
+#include "../build/arm9_exceptions.h"
+
+#define PAYLOAD_ADDRESS 0x01FF8000
+
+void installArm9Handlers(void)
+{
+    memcpy((void *)PAYLOAD_ADDRESS, arm9_exceptions, arm9_exceptions_size);
+    ((void (*)())PAYLOAD_ADDRESS)();
+}
+
+void detectAndProcessExceptionDumps(void)
+{
+    vu32 *dump = (u32 *)0x25000000;
+
+    if(dump[0] == 0xDEADC0DE && dump[1] == 0xDEADCAFE && dump[3] == 9)
+    {
+        char path[41] = "/luma/dumps/arm9";
+        char fileName[] = "crash_dump_00000000.dmp";
+
+        findDumpFile(path, fileName);
+
+        path[16] = '/';
+        memcpy(&path[17], fileName, sizeof(fileName));
+
+        fileWrite((void *)dump, path, dump[5]);
+
+        error("An ARM9 exception occured.\nPlease check your /luma/dumps/arm9 folder.");
+    }
+}

source/exceptions.h

@@ -0,0 +1,11 @@
+/*
+*   exceptions.h
+*       by TuxSH
+*/
+
+#pragma once
+
+#include "types.h"
+
+void installArm9Handlers(void);
+void detectAndProcessExceptionDumps(void);

source/firm.c

@@ -13,6 +13,7 @@
 #include "draw.h"
 #include "screeninit.h"
 #include "loader.h"
+#include "exceptions.h"
 #include "buttons.h"
 #include "../build/patches.h"
 
@@ -67,6 +68,13 @@ void main(void)
     }
     else
     {
+        //Only when "Enable developer features" is set
+        if(CONFIG(5))
+        {
+            detectAndProcessExceptionDumps();
+            installArm9Handlers();
+        }
+
         bootType = 0;
         firmType = 0;
 

source/fs.c

@@ -61,6 +61,27 @@ u32 defPayloadExists(void)
     return (result == FR_OK && info.fname[0]);
 }
 
+void findDumpFile(const char *path, char *fileName)
+{
+    DIR dir;
+    FILINFO info;
+    u32 n = 0;
+
+    while(f_findfirst(&dir, &info, path, fileName) == FR_OK && info.fname[0])
+    {
+        u32 i = 18,
+            tmp = ++n;
+
+        while(tmp)
+        {
+            fileName[i--] = '0' + (tmp % 10);
+            tmp /= 10;
+        }
+    }
+
+    f_closedir(&dir);
+}
+
 void firmRead(void *dest, const char *firmFolder)
 {
     char path[48] = "1:/title/00040138/00000000/content";

source/fs.h

@@ -10,4 +10,5 @@ u32 mountFs(void);
 u32 fileRead(void *dest, const char *path, u32 size);
 u32 fileWrite(const void *buffer, const char *path, u32 size);
 u32 defPayloadExists(void);
+void findDumpFile(const char *path, char *fileName);
 void firmRead(void *dest, const char *firmFolder);