1/* Copyright (c) 2013-2014 Jeffrey Pfau
  2 *
  3 * This Source Code Form is subject to the terms of the Mozilla Public
  4 * License, v. 2.0. If a copy of the MPL was not distributed with this
  5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
  6#include "gba-cli.h"
  7
  8#include "gba-io.h"
  9#include "gba-serialize.h"
 10#include "gba-thread.h"
 11
 12#ifdef USE_CLI_DEBUGGER
 13
 14static const char* ERROR_MISSING_ARGS = "Arguments missing"; // TODO: share
 15
 16static void _GBACLIDebuggerInit(struct CLIDebuggerSystem*);
 17static void _GBACLIDebuggerDeinit(struct CLIDebuggerSystem*);
 18static bool _GBACLIDebuggerCustom(struct CLIDebuggerSystem*);
 19static uint32_t _GBACLIDebuggerLookupIdentifier(struct CLIDebuggerSystem*, const char* name, struct CLIDebugVector* dv);
 20
 21static void _frame(struct CLIDebugger*, struct CLIDebugVector*);
 22static void _load(struct CLIDebugger*, struct CLIDebugVector*);
 23static void _save(struct CLIDebugger*, struct CLIDebugVector*);
 24
 25struct CLIDebuggerCommandSummary _GBACLIDebuggerCommands[] = {
 26	{ "frame", _frame, 0, "Frame advance" },
 27	{ "load", _load, CLIDVParse, "Load a savestate" },
 28	{ "save", _save, CLIDVParse, "Save a savestate" },
 29	{ 0, 0, 0, 0 }
 30};
 31#endif
 32
 33struct GBACLIDebugger* GBACLIDebuggerCreate(struct GBAThread* context) {
 34	struct GBACLIDebugger* debugger = malloc(sizeof(struct GBACLIDebugger));
 35#ifdef USE_CLI_DEBUGGER
 36	debugger->d.init = _GBACLIDebuggerInit;
 37	debugger->d.deinit = _GBACLIDebuggerDeinit;
 38	debugger->d.custom = _GBACLIDebuggerCustom;
 39	debugger->d.lookupIdentifier = _GBACLIDebuggerLookupIdentifier;
 40
 41	debugger->d.name = "Game Boy Advance";
 42	debugger->d.commands = _GBACLIDebuggerCommands;
 43
 44	debugger->context = context;
 45#endif
 46
 47	return debugger;
 48}
 49
 50#ifdef USE_CLI_DEBUGGER
 51static void _GBACLIDebuggerInit(struct CLIDebuggerSystem* debugger) {
 52	struct GBACLIDebugger* gbaDebugger = (struct GBACLIDebugger*) debugger;
 53
 54	gbaDebugger->frameAdvance = false;
 55}
 56
 57static void _GBACLIDebuggerDeinit(struct CLIDebuggerSystem* debugger) {
 58	UNUSED(debugger);
 59}
 60
 61static bool _GBACLIDebuggerCustom(struct CLIDebuggerSystem* debugger) {
 62	struct GBACLIDebugger* gbaDebugger = (struct GBACLIDebugger*) debugger;
 63
 64	if (gbaDebugger->frameAdvance) {
 65		if (!gbaDebugger->inVblank && GBARegisterDISPSTATIsInVblank(gbaDebugger->context->gba->video.dispstat)) {
 66			ARMDebuggerEnter(&gbaDebugger->d.p->d, DEBUGGER_ENTER_BREAKPOINT);
 67			gbaDebugger->frameAdvance = false;
 68			return false;
 69		}
 70		gbaDebugger->inVblank = GBARegisterDISPSTATGetInVblank(gbaDebugger->context->gba->video.dispstat);
 71		return true;
 72	}
 73	return false;
 74}
 75
 76static uint32_t _GBACLIDebuggerLookupIdentifier(struct CLIDebuggerSystem* debugger, const char* name, struct CLIDebugVector* dv) {
 77	struct GBACLIDebugger* gbaDebugger = (struct GBACLIDebugger*) debugger;
 78	int i;
 79	for (i = 0; i < REG_MAX; i += 2) {
 80		const char* reg = GBAIORegisterNames[i >> 1];
 81		if (reg && strcasecmp(reg, name) == 0) {
 82			return GBALoad16(gbaDebugger->context->gba->cpu, BASE_IO | i, 0);
 83		}
 84	}
 85	dv->type = CLIDV_ERROR_TYPE;
 86	return 0;
 87}
 88
 89static void _frame(struct CLIDebugger* debugger, struct CLIDebugVector* dv) {
 90	UNUSED(dv);
 91	debugger->d.state = DEBUGGER_CUSTOM;
 92
 93	struct GBACLIDebugger* gbaDebugger = (struct GBACLIDebugger*) debugger->system;
 94	gbaDebugger->frameAdvance = true;
 95	gbaDebugger->inVblank = GBARegisterDISPSTATGetInVblank(gbaDebugger->context->gba->video.dispstat);
 96}
 97
 98static void _load(struct CLIDebugger* debugger, struct CLIDebugVector* dv) {
 99	if (!dv || dv->type != CLIDV_INT_TYPE) {
100		printf("%s\n", ERROR_MISSING_ARGS);
101		return;
102	}
103
104	int state = dv->intValue;
105	if (state < 1 || state > 9) {
106		printf("State %u out of range", state);
107	}
108
109	struct GBACLIDebugger* gbaDebugger = (struct GBACLIDebugger*) debugger->system;
110
111	GBALoadState(gbaDebugger->context->gba, gbaDebugger->context->stateDir, dv->intValue);
112}
113
114static void _save(struct CLIDebugger* debugger, struct CLIDebugVector* dv) {
115	if (!dv || dv->type != CLIDV_INT_TYPE) {
116		printf("%s\n", ERROR_MISSING_ARGS);
117		return;
118	}
119
120	int state = dv->intValue;
121	if (state < 1 || state > 9) {
122		printf("State %u out of range", state);
123	}
124
125	struct GBACLIDebugger* gbaDebugger = (struct GBACLIDebugger*) debugger->system;
126
127	GBASaveState(gbaDebugger->context->gba, gbaDebugger->context->stateDir, dv->intValue, true);
128}
129#endif