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Create macros for and decompile elf_message scripts (#999)

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* elf_message

* Review suggestions
This commit is contained in:
Tharo 2021-11-16 23:04:31 +00:00 committed by GitHub
parent a3b4dcf388
commit 9ca6bfdac3
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GPG key ID: 4AEE18F83AFDEB23
6 changed files with 464 additions and 25 deletions
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129
include/z64elf_message.h Normal file
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@ -0,0 +1,129 @@
#ifndef Z64ELF_MESSAGE_H
#define Z64ELF_MESSAGE_H
#include "ultra64.h"
// Checks the condition and exits the script if the check passes
#define ELF_MSG_TYPE_CHECK 0
// ? (unused)
#define ELF_MSG_TYPE_UNK_1 1
// ? (unused)
#define ELF_MSG_TYPE_UNK_2 2
// Checks the condition and skips forward by some number of commands if the check passes
#define ELF_MSG_TYPE_SKIP 3
// Always ends the script, returning the text id for this command
#define ELF_MSG_TYPE_END 7
// Check an eventChkInf flag
#define ELF_MSG_CONDITION_FLAG 0
// Check a dungeon item (map, compass, boss key)
#define ELF_MSG_CONDITION_DUNGEON_ITEM 1
// Check if an item is in an item slot
#define ELF_MSG_CONDITION_ITEM 2
// "Other" conditions described below
#define ELF_MSG_CONDITION_OTHER 3
// Check what strength upgrade has been obtained so far
#define ELF_MSG_CONDITION_STRENGTH_UPG 0
// Check if specific boots have been obtained so far
#define ELF_MSG_CONDITION_BOOTS 1
// Check if a particular song has been obtained
#define ELF_MSG_CONDITION_SONG 2
// Check if a particular medallion has been obtained
#define ELF_MSG_CONDITION_MEDALLION 3
// Check if the magic meter has been obtained
#define ELF_MSG_CONDITION_MAGIC 4
/*
* Bitpack byte 0
*/
#define ELF_MSG_B0(type, cond_type, tf) \
_SHIFTL(ELF_MSG_TYPE_##type, 5, 3) | \
_SHIFTL(ELF_MSG_CONDITION_##cond_type, 1, 4) | \
_SHIFTL(tf, 0, 1)
/*
* Bitpack byte 1
*/
#define ELF_MSG_B1(cond_type, data) \
_SHIFTL(ELF_MSG_CONDITION_##cond_type, 4, 4) | \
_SHIFTL(data, 0, 4)
/*
* Other bytes
*/
#define ELF_MSG_B(data) \
_SHIFTL(data, 0, 8)
/*
* Command macros
*/
#define ELF_MSG_FLAG(type, textId, tf, flag) \
{ \
ELF_MSG_B0(type, FLAG, tf), \
ELF_MSG_B(flag), \
ELF_MSG_B(textId), \
ELF_MSG_B(0), \
}
#define ELF_MSG_END(textId) \
ELF_MSG_FLAG(END, textId, false, 0)
#define ELF_MSG_DUNGEON_ITEM(type, textId, tf, itemId) \
{ \
ELF_MSG_B0(type, DUNGEON_ITEM, tf), \
ELF_MSG_B(itemId), \
ELF_MSG_B(textId), \
ELF_MSG_B(0), \
}
#define ELF_MSG_ITEM(type, textId, tf, slotItemId, itemId) \
{ \
ELF_MSG_B0(type, ITEM, tf), \
ELF_MSG_B(slotItemId), \
ELF_MSG_B(textId), \
ELF_MSG_B(itemId), \
}
#define ELF_MSG_STRENGTH_UPG(type, textId, tf, strUpg) \
{ \
ELF_MSG_B0(type, OTHER, tf), \
ELF_MSG_B1(STRENGTH_UPG, strUpg), \
ELF_MSG_B(textId), \
ELF_MSG_B(0), \
}
#define ELF_MSG_BOOTS(type, textId, tf, itemId) \
{ \
ELF_MSG_B0(type, OTHER, tf), \
ELF_MSG_B1(BOOTS, 0), \
ELF_MSG_B(textId), \
ELF_MSG_B(itemId), \
}
#define ELF_MSG_SONG(type, textId, tf, itemId) \
{ \
ELF_MSG_B0(type, OTHER, tf), \
ELF_MSG_B1(SONG, 0), \
ELF_MSG_B(textId), \
ELF_MSG_B(itemId), \
}
#define ELF_MSG_MEDALLION(type, textId, tf, itemId) \
{ \
ELF_MSG_B0(type, OTHER, tf), \
ELF_MSG_B1(MEDALLION, 0), \
ELF_MSG_B(textId), \
ELF_MSG_B(itemId), \
}
#define ELF_MSG_MAGIC(type, textId, tf) \
{ \
ELF_MSG_B0(type, OTHER, tf), \
ELF_MSG_B1(MAGIC, 0), \
ELF_MSG_B(textId), \
ELF_MSG_B(0), \
}
#endif

6
spec
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@ -6796,13 +6796,15 @@ endseg
beginseg
name "elf_message_field"
romalign 0x1000
include "build/baserom/elf_message_field.o"
include "build/src/elf_message/elf_message_field.o"
number 0
endseg
beginseg
name "elf_message_ydan"
romalign 0x1000
include "build/baserom/elf_message_ydan.o"
include "build/src/elf_message/elf_message_ydan.o"
number 0
endseg
beginseg

59
src/code/z_elf_message.c
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@ -1,16 +1,29 @@
#include "global.h"
#include "z64elf_message.h"
// TODO: use macros to define elf messages once the format is fully documented
ElfMessage sChildSariaMsgs[] = {
{ 0x66, 0x00, 0x03, 0x00 }, { 0x00, 0x37, 0x61, 0x00 }, { 0xE0, 0x00, 0x64, 0x00 }, { 0x00, 0x25, 0x62, 0x00 },
{ 0x00, 0x37, 0x63, 0x00 }, { 0x00, 0x43, 0x65, 0x00 }, { 0x06, 0x30, 0x66, 0x66 }, { 0x06, 0x30, 0x66, 0x67 },
{ 0x06, 0x30, 0x66, 0x68 }, { 0x06, 0x20, 0x67, 0x65 }, { 0x06, 0x30, 0x68, 0x69 }, { 0x06, 0x30, 0x68, 0x6A },
{ 0xE0, 0x00, 0x69, 0x00 },
ELF_MSG_STRENGTH_UPG(SKIP, 3, false, 0),
ELF_MSG_FLAG(CHECK, 0x61, false, 0x37), /* eventChkInf[3] & 0x80 */
ELF_MSG_END(0x64),
ELF_MSG_FLAG(CHECK, 0x62, false, 0x25), /* eventChkInf[2] & 0x20 */
ELF_MSG_FLAG(CHECK, 0x63, false, 0x37), /* eventChkInf[3] & 0x80 */
ELF_MSG_FLAG(CHECK, 0x65, false, 0x43), /* eventChkInf[4] & 0x8 */
ELF_MSG_MEDALLION(CHECK, 0x66, false, ITEM_MEDALLION_FOREST),
ELF_MSG_MEDALLION(CHECK, 0x66, false, ITEM_MEDALLION_FIRE),
ELF_MSG_MEDALLION(CHECK, 0x66, false, ITEM_MEDALLION_WATER),
ELF_MSG_SONG(CHECK, 0x67, false, ITEM_SONG_STORMS),
ELF_MSG_MEDALLION(CHECK, 0x68, false, ITEM_MEDALLION_SPIRIT),
ELF_MSG_MEDALLION(CHECK, 0x68, false, ITEM_MEDALLION_SHADOW),
ELF_MSG_END(0x69),
};
ElfMessage sAdultSariaMsgs[] = {
{ 0x06, 0x30, 0x6A, 0x66 }, { 0x06, 0x30, 0x6B, 0x67 }, { 0x06, 0x30, 0x6B, 0x68 },
{ 0x06, 0x30, 0x6C, 0x69 }, { 0x06, 0x30, 0x6C, 0x6A }, { 0xE0, 0x00, 0x6D, 0x00 },
ELF_MSG_MEDALLION(CHECK, 0x6A, false, ITEM_MEDALLION_FOREST),
ELF_MSG_MEDALLION(CHECK, 0x6B, false, ITEM_MEDALLION_FIRE),
ELF_MSG_MEDALLION(CHECK, 0x6B, false, ITEM_MEDALLION_WATER),
ELF_MSG_MEDALLION(CHECK, 0x6C, false, ITEM_MEDALLION_SPIRIT),
ELF_MSG_MEDALLION(CHECK, 0x6C, false, ITEM_MEDALLION_SHADOW),
ELF_MSG_END(0x6D),
};
u32 ElfMessage_CheckCondition(ElfMessage* msg) {
@ -18,29 +31,29 @@ u32 ElfMessage_CheckCondition(ElfMessage* msg) {
u16 flag;
switch (type) {
case 0:
case (ELF_MSG_CONDITION_FLAG << 1):
flag = 1 << (msg->byte1 & 0x0F);
return ((msg->byte0 & 1) == 1) == ((flag & gSaveContext.eventChkInf[(msg->byte1 & 0xF0) >> 4]) != 0);
case 2:
case (ELF_MSG_CONDITION_DUNGEON_ITEM << 1):
return ((msg->byte0 & 1) == 1) ==
(CHECK_DUNGEON_ITEM(msg->byte1 - ITEM_KEY_BOSS, gSaveContext.mapIndex) != 0);
case 4:
case (ELF_MSG_CONDITION_ITEM << 1):
return ((msg->byte0 & 1) == 1) == (msg->byte3 == INV_CONTENT(msg->byte1));
case 6:
case (ELF_MSG_CONDITION_OTHER << 1):
switch (msg->byte1 & 0xF0) {
case 0x00:
case (ELF_MSG_CONDITION_STRENGTH_UPG << 4):
return ((msg->byte0 & 1) == 1) == ((msg->byte1 & 0x0F) == CUR_UPG_VALUE(UPG_STRENGTH));
case 0x10:
case (ELF_MSG_CONDITION_BOOTS << 4):
return ((msg->byte0 & 1) == 1) ==
(((gBitFlags[msg->byte3 - ITEM_BOOTS_KOKIRI] << gEquipShifts[EQUIP_BOOTS]) &
gSaveContext.inventory.equipment) != 0);
case 0x20:
case (ELF_MSG_CONDITION_SONG << 4):
return ((msg->byte0 & 1) == 1) ==
(CHECK_QUEST_ITEM(msg->byte3 - ITEM_SONG_MINUET + QUEST_SONG_MINUET) != 0);
case 0x30:
case (ELF_MSG_CONDITION_MEDALLION << 4):
return ((msg->byte0 & 1) == 1) ==
(CHECK_QUEST_ITEM(msg->byte3 - ITEM_MEDALLION_FOREST + QUEST_MEDALLION_FOREST) != 0);
case 0x40:
case (ELF_MSG_CONDITION_MAGIC << 4):
return ((msg->byte0 & 1) == 1) == (((void)0, gSaveContext.magicAcquired) != 0);
}
}
@ -54,7 +67,7 @@ u32 ElfMessage_CheckCondition(ElfMessage* msg) {
u32 func_8006BE88(ElfMessage** msgp) {
u32 temp = true;
while (((*msgp)->byte0 & 0xE0) == 0x20) {
while (((*msgp)->byte0 & 0xE0) == (ELF_MSG_TYPE_UNK_1 << 5)) {
if (!ElfMessage_CheckCondition(*msgp)) {
temp = false;
}
@ -80,7 +93,7 @@ u32 func_8006BF1C(ElfMessage** msgp) {
temp1 += sp44[temp2];
temp2++;
msg++;
} while ((msg->byte0 & 0xE0) == 0x40);
} while ((msg->byte0 & 0xE0) == (ELF_MSG_TYPE_UNK_2 << 5));
if (temp1 == 0) {
return false;
@ -104,28 +117,28 @@ u32 func_8006BF1C(ElfMessage** msgp) {
u16 ElfMessage_GetTextFromMsgs(ElfMessage* msg) {
while (true) {
switch (msg->byte0 & 0xE0) {
case 0x00:
case (ELF_MSG_TYPE_CHECK << 5):
if (ElfMessage_CheckCondition(msg)) {
return msg->byte2 | 0x100;
}
break;
case 0x20:
case (ELF_MSG_TYPE_UNK_1 << 5):
if (func_8006BE88(&msg)) {
return msg->byte2 | 0x100;
}
break;
case 0x40:
case (ELF_MSG_TYPE_UNK_2 << 5):
if (func_8006BF1C(&msg)) {
return msg->byte2 | 0x100;
}
break;
case 0x60:
case (ELF_MSG_TYPE_SKIP << 5):
if (ElfMessage_CheckCondition(msg)) {
msg += msg->byte2;
msg--;
}
break;
case 0xE0:
case (ELF_MSG_TYPE_END << 5):
return msg->byte2 | 0x100;
default:
LOG_STRING("企画外 条件", "../z_elf_message.c", 281); // "Unplanned conditions"

33
src/elf_message/elf_message_field.c Normal file
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@ -0,0 +1,33 @@
#include "global.h"
#include "z64elf_message.h"
ElfMessage gOverworldNaviMsgs[] = {
ELF_MSG_FLAG(CHECK, 0x40, false, 0x05), /* eventChkInf[0] & 0x20 */
ELF_MSG_FLAG(CHECK, 0x41, false, 0x09), /* eventChkInf[0] & 0x200 */
ELF_MSG_FLAG(CHECK, 0x42, false, 0x12), /* eventChkInf[1] & 0x4 */
ELF_MSG_FLAG(CHECK, 0x43, false, 0x14), /* eventChkInf[1] & 0x10 */
ELF_MSG_FLAG(CHECK, 0x44, false, 0x40), /* eventChkInf[4] & 0x1 */
ELF_MSG_SONG(CHECK, 0x45, false, ITEM_SONG_SARIA),
ELF_MSG_STRENGTH_UPG(CHECK, 0x46, true, 0),
ELF_MSG_FLAG(CHECK, 0x47, false, 0x25), /* eventChkInf[2] & 0x20 */
ELF_MSG_MAGIC(CHECK, 0x48, false),
ELF_MSG_FLAG(CHECK, 0x49, false, 0x33), /* eventChkInf[3] & 0x8 */
ELF_MSG_FLAG(CHECK, 0x4A, false, 0x37), /* eventChkInf[3] & 0x80 */
ELF_MSG_FLAG(CHECK, 0x4B, false, 0x80), /* eventChkInf[8] & 0x1 */
ELF_MSG_FLAG(CHECK, 0x4C, false, 0x43), /* eventChkInf[4] & 0x8 */
ELF_MSG_FLAG(CHECK, 0x4D, false, 0x45), /* eventChkInf[4] & 0x20 */
ELF_MSG_ITEM(CHECK, 0x4E, true, ITEM_HOOKSHOT, ITEM_NONE),
ELF_MSG_MEDALLION(CHECK, 0x50, false, ITEM_MEDALLION_FOREST),
ELF_MSG_MEDALLION(CHECK, 0x51, false, ITEM_MEDALLION_FIRE),
ELF_MSG_BOOTS(CHECK, 0x52, false, ITEM_BOOTS_IRON),
ELF_MSG_MEDALLION(CHECK, 0x53, false, ITEM_MEDALLION_WATER),
ELF_MSG_FLAG(CHECK, 0x54, false, 0xAA), /* eventChkInf[10] & 0x400 */
ELF_MSG_ITEM(CHECK, 0x55, true, ITEM_LENS, ITEM_NONE),
ELF_MSG_MEDALLION(CHECK, 0x57, false, ITEM_MEDALLION_SHADOW),
ELF_MSG_SONG(CHECK, 0x58, false, ITEM_SONG_REQUIEM),
ELF_MSG_STRENGTH_UPG(CHECK, 0x56, true, 1),
ELF_MSG_MEDALLION(CHECK, 0x5A, false, ITEM_MEDALLION_SPIRIT),
ELF_MSG_ITEM(CHECK, 0x5B, true, ITEM_ARROW_LIGHT, ITEM_NONE),
ELF_MSG_FLAG(CHECK, 0x5C, false, 0xC3), /* eventChkInf[12] & 0x8 */
ELF_MSG_END(0x5F),
};

6
src/elf_message/elf_message_ydan.c Normal file
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@ -0,0 +1,6 @@
#include "global.h"
#include "z64elf_message.h"
ElfMessage gDungeonNaviMsgs[] = {
ELF_MSG_END(0x5F),
};

256
tools/disasm_elf_msg.py Normal file
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@ -0,0 +1,256 @@
#!/usr/bin/env python3
import struct, sys
item_ids = {
0x00 : "ITEM_STICK",
0x01 : "ITEM_NUT",
0x02 : "ITEM_BOMB",
0x03 : "ITEM_BOW",
0x04 : "ITEM_ARROW_FIRE",
0x05 : "ITEM_DINS_FIRE",
0x06 : "ITEM_SLINGSHOT",
0x07 : "ITEM_OCARINA_FAIRY",
0x08 : "ITEM_OCARINA_TIME",
0x09 : "ITEM_BOMBCHU",
0x0A : "ITEM_HOOKSHOT",
0x0B : "ITEM_LONGSHOT",
0x0C : "ITEM_ARROW_ICE",
0x0D : "ITEM_FARORES_WIND",
0x0E : "ITEM_BOOMERANG",
0x0F : "ITEM_LENS",
0x10 : "ITEM_BEAN",
0x11 : "ITEM_HAMMER",
0x12 : "ITEM_ARROW_LIGHT",
0x13 : "ITEM_NAYRUS_LOVE",
0x14 : "ITEM_BOTTLE",
0x15 : "ITEM_POTION_RED",
0x16 : "ITEM_POTION_GREEN",
0x17 : "ITEM_POTION_BLUE",
0x18 : "ITEM_FAIRY",
0x19 : "ITEM_FISH",
0x1A : "ITEM_MILK_BOTTLE",
0x1B : "ITEM_LETTER_RUTO",
0x1C : "ITEM_BLUE_FIRE",
0x1D : "ITEM_BUG",
0x1E : "ITEM_BIG_POE",
0x1F : "ITEM_MILK_HALF",
0x20 : "ITEM_POE",
0x21 : "ITEM_WEIRD_EGG",
0x22 : "ITEM_CHICKEN",
0x23 : "ITEM_LETTER_ZELDA",
0x24 : "ITEM_MASK_KEATON",
0x25 : "ITEM_MASK_SKULL",
0x26 : "ITEM_MASK_SPOOKY",
0x27 : "ITEM_MASK_BUNNY",
0x28 : "ITEM_MASK_GORON",
0x29 : "ITEM_MASK_ZORA",
0x2A : "ITEM_MASK_GERUDO",
0x2B : "ITEM_MASK_TRUTH",
0x2C : "ITEM_SOLD_OUT",
0x2D : "ITEM_POCKET_EGG",
0x2E : "ITEM_POCKET_CUCCO",
0x2F : "ITEM_COJIRO",
0x30 : "ITEM_ODD_MUSHROOM",
0x31 : "ITEM_ODD_POTION",
0x32 : "ITEM_SAW",
0x33 : "ITEM_SWORD_BROKEN",
0x34 : "ITEM_PRESCRIPTION",
0x35 : "ITEM_FROG",
0x36 : "ITEM_EYEDROPS",
0x37 : "ITEM_CLAIM_CHECK",
0x38 : "ITEM_BOW_ARROW_FIRE",
0x39 : "ITEM_BOW_ARROW_ICE",
0x3A : "ITEM_BOW_ARROW_LIGHT",
0x3B : "ITEM_SWORD_KOKIRI",
0x3C : "ITEM_SWORD_MASTER",
0x3D : "ITEM_SWORD_BGS",
0x3E : "ITEM_SHIELD_DEKU",
0x3F : "ITEM_SHIELD_HYLIAN",
0x40 : "ITEM_SHIELD_MIRROR",
0x41 : "ITEM_TUNIC_KOKIRI",
0x42 : "ITEM_TUNIC_GORON",
0x43 : "ITEM_TUNIC_ZORA",
0x44 : "ITEM_BOOTS_KOKIRI",
0x45 : "ITEM_BOOTS_IRON",
0x46 : "ITEM_BOOTS_HOVER",
0x47 : "ITEM_BULLET_BAG_30",
0x48 : "ITEM_BULLET_BAG_40",
0x49 : "ITEM_BULLET_BAG_50",
0x4A : "ITEM_QUIVER_30",
0x4B : "ITEM_QUIVER_40",
0x4C : "ITEM_QUIVER_50",
0x4D : "ITEM_BOMB_BAG_20",
0x4E : "ITEM_BOMB_BAG_30",
0x4F : "ITEM_BOMB_BAG_40",
0x50 : "ITEM_BRACELET",
0x51 : "ITEM_GAUNTLETS_SILVER",
0x52 : "ITEM_GAUNTLETS_GOLD",
0x53 : "ITEM_SCALE_SILVER",
0x54 : "ITEM_SCALE_GOLDEN",
0x55 : "ITEM_SWORD_KNIFE",
0x56 : "ITEM_WALLET_ADULT",
0x57 : "ITEM_WALLET_GIANT",
0x58 : "ITEM_SEEDS",
0x59 : "ITEM_FISHING_POLE",
0x5A : "ITEM_SONG_MINUET",
0x5B : "ITEM_SONG_BOLERO",
0x5C : "ITEM_SONG_SERENADE",
0x5D : "ITEM_SONG_REQUIEM",
0x5E : "ITEM_SONG_NOCTURNE",
0x5F : "ITEM_SONG_PRELUDE",
0x60 : "ITEM_SONG_LULLABY",
0x61 : "ITEM_SONG_EPONA",
0x62 : "ITEM_SONG_SARIA",
0x63 : "ITEM_SONG_SUN",
0x64 : "ITEM_SONG_TIME",
0x65 : "ITEM_SONG_STORMS",
0x66 : "ITEM_MEDALLION_FOREST",
0x67 : "ITEM_MEDALLION_FIRE",
0x68 : "ITEM_MEDALLION_WATER",
0x69 : "ITEM_MEDALLION_SPIRIT",
0x6A : "ITEM_MEDALLION_SHADOW",
0x6B : "ITEM_MEDALLION_LIGHT",
0x6C : "ITEM_KOKIRI_EMERALD",
0x6D : "ITEM_GORON_RUBY",
0x6E : "ITEM_ZORA_SAPPHIRE",
0x6F : "ITEM_STONE_OF_AGONY",
0x70 : "ITEM_GERUDO_CARD",
0x71 : "ITEM_SKULL_TOKEN",
0x72 : "ITEM_HEART_CONTAINER",
0x73 : "ITEM_HEART_PIECE",
0x74 : "ITEM_KEY_BOSS",
0x75 : "ITEM_COMPASS",
0x76 : "ITEM_DUNGEON_MAP",
0x77 : "ITEM_KEY_SMALL",
0x78 : "ITEM_MAGIC_SMALL",
0x79 : "ITEM_MAGIC_LARGE",
0x7A : "ITEM_HEART_PIECE_2",
0x7B : "ITEM_INVALID_1",
0x7C : "ITEM_INVALID_2",
0x7D : "ITEM_INVALID_3",
0x7E : "ITEM_INVALID_4",
0x7F : "ITEM_INVALID_5",
0x80 : "ITEM_INVALID_6",
0x81 : "ITEM_INVALID_7",
0x82 : "ITEM_MILK",
0x83 : "ITEM_HEART",
0x84 : "ITEM_RUPEE_GREEN",
0x85 : "ITEM_RUPEE_BLUE",
0x86 : "ITEM_RUPEE_RED",
0x87 : "ITEM_RUPEE_PURPLE",
0x88 : "ITEM_RUPEE_GOLD",
0x89 : "ITEM_INVALID_8",
0x8A : "ITEM_STICKS_5",
0x8B : "ITEM_STICKS_10",
0x8C : "ITEM_NUTS_5",
0x8D : "ITEM_NUTS_10",
0x8E : "ITEM_BOMBS_5",
0x8F : "ITEM_BOMBS_10",
0x90 : "ITEM_BOMBS_20",
0x91 : "ITEM_BOMBS_30",
0x92 : "ITEM_ARROWS_SMALL",
0x93 : "ITEM_ARROWS_MEDIUM",
0x94 : "ITEM_ARROWS_LARGE",
0x95 : "ITEM_SEEDS_30",
0x96 : "ITEM_BOMBCHUS_5",
0x97 : "ITEM_BOMBCHUS_20",
0x98 : "ITEM_STICK_UPGRADE_20",
0x99 : "ITEM_STICK_UPGRADE_30",
0x9A : "ITEM_NUT_UPGRADE_30",
0x9B : "ITEM_NUT_UPGRADE_40",
0xFC : "ITEM_LAST_USED",
0xFE : "ITEM_NONE_FE",
0xFF : "ITEM_NONE",
}
def disas_elfmsgs(start):
baserom = None
with open("baserom.z64", "rb") as infile:
baserom = bytearray(infile.read())
branches = []
pos = start
while (True):
print(f"/* {pos - start:04X} {((pos - start) // 4):3} */ ", end="")
b0, b1, b2, b3 = struct.unpack(">BBBB", baserom[pos:pos+4])
elf_message_types = {
0x00: "CHECK",
0x20: "UNK_1",
0x40: "UNK_2",
0x60: "SKIP",
0xE0: "END",
}
cont = True
branch_to = None
# Get Type
elf_message_type = b0 & 0xE0
ARG_0 = elf_message_types[elf_message_type]
if elf_message_type in [0, 0x20, 0x40, 0xE0]:
if elf_message_type == 0xE0:
cont = False
ARG_1 = f"0x{(b2 & 0xFF):04X}"
elif elf_message_type == 0x60:
branch_to = 4 * (b2 & 0xFF)
ARG_1 = (b2 & 0xFF)
else:
assert False , "Encountered unknown type"
ARG_2 = f"{bool(b0 & 1)}".lower()
# Get condition
condition_type = b0 & 0x1E
if condition_type == 0:
if elf_message_type == 0xE0 and b1 == 0 and not (b0 & 1):
print(f"ELF_MSG_END({ARG_1}),")
else:
print(f"ELF_MSG_FLAG({ARG_0}, {ARG_1}, {ARG_2}, 0x{b1:02X}), /* eventChkInf[{(b1 >> 4) & 0xF}] & 0x{1 << (b1 & 0xF):X} */")
assert b3 == 0
elif condition_type == 2:
print(f"ELF_MSG_DUNGEON_ITEM({ARG_0}, {ARG_1}, {ARG_2}, {item_ids[b1]}),")
assert b3 == 0
elif condition_type == 4:
print(f"ELF_MSG_ITEM({ARG_0}, {ARG_1}, {ARG_2}, {item_ids[b1]}, {item_ids[b3]}),")
elif condition_type == 6:
condition_other_type = b1 & 0xF0
if condition_other_type == 0:
print(f"ELF_MSG_STRENGTH_UPG({ARG_0}, {ARG_1}, {ARG_2}, {b1 & 0xF}),")
assert b3 == 0
elif condition_other_type == 0x10:
print(f"ELF_MSG_BOOTS({ARG_0}, {ARG_1}, {ARG_2}, {item_ids[b3]}),")
assert (b1 & 0xF) == 0
elif condition_other_type == 0x20:
print(f"ELF_MSG_SONG({ARG_0}, {ARG_1}, {ARG_2}, {item_ids[b3]}),")
assert (b1 & 0xF) == 0
elif condition_other_type == 0x30:
print(f"ELF_MSG_MEDALLION({ARG_0}, {ARG_1}, {ARG_2}, {item_ids[b3]}),")
assert (b1 & 0xF) == 0
elif condition_other_type == 0x40:
print(f"ELF_MSG_MAGIC({ARG_0}, {ARG_1}, {ARG_2}),")
assert (b1 & 0xF) == 0
assert b3 == 0
else:
assert False , "Encountered unknown condition (other) type"
else:
assert False , "Encountered unknown condition type"
# Control flow
if branch_to is not None:
branches.append(branch_to)
pos += 4
if not cont:
print("")
if not cont and all([dst < pos - start for dst in branches]):
break
disas_elfmsgs(int(sys.argv[1],16))