Initial commit

wiipax/stub/exception.c

@@ -0,0 +1,52 @@
+#include "common.h"
+#include "string.h"
+
+extern char exception_asm_start, exception_asm_end;
+
+void exception_handler(int exception)
+{
+	u32 *x;
+	u32 i;
+
+	printf("\nException %04x occurred!\n", exception);
+
+	x = (u32 *)0x80003500;
+
+	printf("\n R0..R7    R8..R15  R16..R23  R24..R31\n");
+	for (i = 0; i < 8; i++) {
+		printf("%08x  %08x  %08x  %08x\n", x[0], x[8], x[16], x[24]);
+		x++;
+	}
+	x += 24;
+
+	printf("\n CR/XER    LR/CTR  SRR0/SRR1 DAR/DSISR\n");
+	for (i = 0; i < 2; i++) {
+		printf("%08x  %08x  %08x  %08x\n", x[0], x[2], x[4], x[6]);
+		x++;
+	}
+
+	// Hang.
+	for (;;)
+		;
+}
+
+void exception_init(void)
+{
+	u32 vector;
+	u32 len_asm;
+
+	for (vector = 0x100; vector < 0x1800; vector += 0x10) {
+		u32 *insn = (u32 *)(0x80000000 + vector);
+
+		insn[0] = 0xbc003500;			// stmw 0,0x3500(0)
+		insn[1] = 0x38600000 | vector;	// li 3,vector
+		insn[2] = 0x48003602;			// ba 0x3600
+		insn[3] = 0;
+	}
+	sync_before_exec((void *)0x80000100, 0x1f00);
+
+	len_asm = &exception_asm_end - &exception_asm_start;
+	memcpy((void *)0x80003600, &exception_asm_start, len_asm);
+	sync_before_exec((void *)0x80003600, len_asm);
+}
+