From ee66bde8a03cb3cce97f6c1d6186bd53d3f7c6f0 Mon Sep 17 00:00:00 2001
From: zeromus <zeromus@users.sf.net>
Date: Wed, 17 Mar 2010 22:45:33 +0000
Subject: [PATCH] debug: add no$ message support

---
 desmume/src/debug.cpp              | 51 +++++++++++++++++++++++++++++-
 desmume/src/debug.h                |  1 +
 desmume/src/thumb_instructions.cpp | 11 +++++++
 3 files changed, 62 insertions(+), 1 deletion(-)

diff --git a/desmume/src/debug.cpp b/desmume/src/debug.cpp
index 934f43742..b2403f988 100644
--- a/desmume/src/debug.cpp
+++ b/desmume/src/debug.cpp
@@ -29,6 +29,8 @@
 #include "thumb_instructions.h"
 #include "cp15.h"
 #include "NDSSystem.h"
+#include "utils/xstring.h"
+#include "movie.h"
 
 #ifdef HAVE_LUA
 #include "lua-engine.h"
@@ -290,7 +292,7 @@ void IdeasLog(armcpu_t* cpu)
 {
 	u32 adr = cpu->R[0];
 	for(;;) {
-		u8 c = MMU_read8(cpu->proc_ID,adr);
+		u8 c = _MMU_read08(cpu->proc_ID, MMU_AT_DEBUG, adr);
 		adr++;
 		if(!c) break;
 		printf("%c",c);
@@ -298,3 +300,50 @@ void IdeasLog(armcpu_t* cpu)
 	//don't emit a newline. that is a pain in the butt.
 }
 
+void NocashMessage(armcpu_t* cpu)
+{
+	u32 adr = cpu->instruct_adr + 6;
+
+	std::string todo;
+	for(;;) {
+		u8 c = _MMU_read08(cpu->proc_ID, MMU_AT_DEBUG, adr);
+		adr++;
+		if(!c) break;
+		todo.push_back(c);
+	}
+
+	//r0,r1,r2,...,r15  show register content (displayed as 32bit Hex number)
+	//sp,lr,pc          alias for r13,r14,r15
+	//scanline          show current scanline number
+	//frame             show total number of frames since coldboot
+	//totalclks         show total number of clock cycles since coldboot
+	//lastclks          show number of cycles since previous lastclks (or zeroclks)
+	//zeroclks          resets the 'lastclks' counter
+
+	//this is very inefficiently coded!
+	char tmp[100];
+	todo = mass_replace(todo,"%sp%","%r13%");
+	todo = mass_replace(todo,"%lr%","%r14%");
+	todo = mass_replace(todo,"%pc%","%r15%");
+	sprintf(tmp,"%08X",cpu->R[0]); todo = mass_replace(todo,"%r0%",tmp);
+	sprintf(tmp,"%08X",cpu->R[1]); todo = mass_replace(todo,"%r1%",tmp);
+	sprintf(tmp,"%08X",cpu->R[2]); todo = mass_replace(todo,"%r2%",tmp);
+	sprintf(tmp,"%08X",cpu->R[3]); todo = mass_replace(todo,"%r3%",tmp);
+	sprintf(tmp,"%08X",cpu->R[4]); todo = mass_replace(todo,"%r4%",tmp);
+	sprintf(tmp,"%08X",cpu->R[5]); todo = mass_replace(todo,"%r5%",tmp);
+	sprintf(tmp,"%08X",cpu->R[6]); todo = mass_replace(todo,"%r6%",tmp);
+	sprintf(tmp,"%08X",cpu->R[7]); todo = mass_replace(todo,"%r7%",tmp);
+	sprintf(tmp,"%08X",cpu->R[8]); todo = mass_replace(todo,"%r8%",tmp);
+	sprintf(tmp,"%08X",cpu->R[9]); todo = mass_replace(todo,"%r9%",tmp);
+	sprintf(tmp,"%08X",cpu->R[10]); todo = mass_replace(todo,"%r10%",tmp);
+	sprintf(tmp,"%08X",cpu->R[11]); todo = mass_replace(todo,"%r11%",tmp);
+	sprintf(tmp,"%08X",cpu->R[12]); todo = mass_replace(todo,"%r12%",tmp);
+	sprintf(tmp,"%08X",cpu->R[13]); todo = mass_replace(todo,"%r13%",tmp);
+	sprintf(tmp,"%08X",cpu->R[14]); todo = mass_replace(todo,"%r14%",tmp);
+	sprintf(tmp,"%08X",cpu->R[15]); todo = mass_replace(todo,"%r15%",tmp);
+	sprintf(tmp,"%d",nds.VCount); todo = mass_replace(todo,"%scanline%",tmp);
+	sprintf(tmp,"%d",currFrameCounter); todo = mass_replace(todo,"%frame%",tmp);
+	sprintf(tmp,"%lld",nds_timer); todo = mass_replace(todo,"%totalclks%",tmp);
+
+	printf("%s",todo.c_str());
+}
\ No newline at end of file
diff --git a/desmume/src/debug.h b/desmume/src/debug.h
index e9b02581e..e966add2e 100644
--- a/desmume/src/debug.h
+++ b/desmume/src/debug.h
@@ -138,6 +138,7 @@ public:
 #define INFO(...) INFOC(10, __VA_ARGS__)
 
 void IdeasLog(armcpu_t* cpu);
+void NocashMessage(armcpu_t* cpu);
 
 enum EDEBUG_EVENT
 {
diff --git a/desmume/src/thumb_instructions.cpp b/desmume/src/thumb_instructions.cpp
index 27e14755f..003f0739f 100644
--- a/desmume/src/thumb_instructions.cpp
+++ b/desmume/src/thumb_instructions.cpp
@@ -1034,6 +1034,17 @@ TEMPLATE static  u32 FASTCALL OP_B_COND(const u32 i)
 
 TEMPLATE static  u32 FASTCALL OP_B_UNCOND(const u32 i)
 {
+#ifdef DEVELOPER
+	//nocash message detection
+	const u16 last = _MMU_read16<PROCNUM,MMU_AT_DEBUG>(cpu->instruct_adr-2);
+	const u16 next = _MMU_read16<PROCNUM,MMU_AT_DEBUG>(cpu->instruct_adr+2);
+	static const u16 mov_r12_r12 = 0x46E4;
+	if(last == mov_r12_r12 && next == 0x6464)
+	{
+		NocashMessage(cpu);
+	}
+#endif
+
 	cpu->R[15] += (SIGNEEXT_IMM11(i)<<1);
 	cpu->next_instruction = cpu->R[15];
 	return 1;