Decompile OSPanic

SeekyCt · Dec 29, 2023 · 2d1baee · 2d1baee
1 parent 56ab817
commit 2d1baee
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Showing 2 changed files with 29 additions and 3 deletions.
diff --git a/spm-headers/include/wii/os/OSContext.h b/spm-headers/include/wii/os/OSContext.h
@@ -31,7 +31,7 @@ UNKNOWN_FUNCTION(OSSetCurrentContext);
 UNKNOWN_FUNCTION(OSGetCurrentContext);
 UNKNOWN_FUNCTION(OSSaveContext);
 UNKNOWN_FUNCTION(OSLoadContext);
-UNKNOWN_FUNCTION(OSGetStackPointer);
+u32 OSGetStackPointer();
 UNKNOWN_FUNCTION(OSSwitchFiber);
 UNKNOWN_FUNCTION(OSSwitchFiberEx);
 UNKNOWN_FUNCTION(OSClearContext);

diff --git a/src/debug.c b/src/debug.c
@@ -2,6 +2,7 @@
 #include <spm/debug.h>
 #include <wii/base.h>
 #include <wii/os.h>
+#include <msl/stdarg.h>
 #include <msl/stdio.h>
 #include <msl/string.h>
 
@@ -20,7 +21,32 @@ void debugReInit()
 
 }
 
-asm void OSPanic(const char * filename, s32 line, const char * msg, ...)
+void OSPanic(const char * filename, s32 line, const char * msg, ...)
 {
-    #include "asm/8019e33c.s"
+    va_list args;
+    char buf[2048];
+    u32 stackDepth;
+    u32 * stack;
+    int pos;
+
+    // Format header text
+    va_start(args, msg);
+    pos = vsprintf(buf, msg, args);
+    va_end(args);
+    pos += sprintf(buf + pos, "\n  in \"%s\" on line %d.\n", filename, line);
+    pos += sprintf(buf + pos, "\nAddress:    Back Chain LR Save\n");
+
+    // Traverse stack
+    stackDepth = 0;
+    stack = (u32 *) OSGetStackPointer();
+    while (stack != NULL && stack != (u32 *)0xffffffff && stackDepth++ < 16)
+    {
+        pos += sprintf(buf + pos, "0x%08x: 0x%08x 0x%08x\n", stack, stack[0], stack[1]);
+        stack = (u32 *) *stack;
+    }
+
+    // Halt execution
+    OSDisableInterrupts();
+    PPCHalt();
+    while (1);
 }