Get rid of common syms (#2040)

2024-10-14 23:52:11 -04:00 · 2024-10-14 23:52:11 -04:00 · a55c75d350
parent 253d3dd7ef
commit a55c75d350
96 changed files with 243 additions and 500 deletions
--- a/17
+++ b/17
@ -178,12 +178,20 @@ ifneq (,$(MAKECMDGOALS))
  endif
 endif

+.SHELLSTATUS ?= 0
+
 ifeq ($(SETUP_PREREQS),1)
  # If set on: Default target or a rule requiring a scan
  # Forcibly execute `make tools` since we need them for what we are doing.
-  $(call infoshell, $(MAKE) -f make_tools.mk)
+  $(foreach line, $(shell $(MAKE) -f make_tools.mk | sed "s/ /__SPACE__/g"), $(info $(subst __SPACE__, ,$(line))))
+  ifneq ($(.SHELLSTATUS),0)
+    $(error Errors occurred while building tools. See error messages above for more details)
+  endif
  # Oh and also generate mapjson sources before we use `SCANINC`.
-  $(call infoshell, $(MAKE) generated)
+  $(foreach line, $(shell $(MAKE) generated | sed "s/ /__SPACE__/g"), $(info $(subst __SPACE__, ,$(line))))
+  ifneq ($(.SHELLSTATUS),0)
+    $(error Errors occurred while generating map-related sources. See error messages above for more details)
+  endif
 endif

 # Collect sources
@ -255,6 +263,8 @@ include spritesheet_rules.mk
 include json_data_rules.mk
 include audio_rules.mk

+# NOTE: Tools must have been built prior (FIXME)
+# so you can't really call this rule directly
 generated: $(AUTO_GEN_TARGETS)

 %.s:   ;
@ -270,8 +280,6 @@ generated: $(AUTO_GEN_TARGETS)
 %.lz:     %      ; $(GFX) $< $@
 %.rl:     %      ; $(GFX) $< $@

-# NOTE: Tools must have been built prior (FIXME)
-generated: tools $(AUTO_GEN_TARGETS)
 clean-generated:
 	-rm -f $(AUTO_GEN_TARGETS)

@ -371,6 +379,7 @@ libagbsyscall:
 # Elf from object files
 $(ELF): $(LD_SCRIPT) $(LD_SCRIPT_DEPS) $(OBJS) libagbsyscall
 	@cd $(OBJ_DIR) && $(LD) $(LDFLAGS) -T ../../$< --print-memory-usage -o ../../$@ $(OBJS_REL) $(LIB) | cat
+	@echo "cd $(OBJ_DIR) && $(LD) $(LDFLAGS) -T ../../$< --print-memory-usage -o ../../$@ <objs> <libs> | cat"
 	$(FIX) $@ -t"$(TITLE)" -c$(GAME_CODE) -m$(MAKER_CODE) -r$(REVISION) --silent

 # Builds the rom from the elf file
--- a/common_syms/AgbRfu_LinkManager.txt
+++ b/common_syms/AgbRfu_LinkManager.txt
@ -1 +0,0 @@
-lman
--- a/common_syms/agb_flash.txt
+++ b/common_syms/agb_flash.txt
@ -1,10 +0,0 @@
-gFlashTimeoutFlag
-PollFlashStatus
-WaitForFlashWrite
-ProgramFlashSector
-gFlash
-ProgramFlashByte
-gFlashNumRemainingBytes
-EraseFlashChip
-EraseFlashSector
-gFlashMaxTime
--- a/common_syms/apprentice.txt
+++ b/common_syms/apprentice.txt
@ -1,3 +0,0 @@
-gApprenticePartyMovesData
-gApprenticeQuestionData
-gApprenticeFunc
--- a/common_syms/battle_anim_throw.txt
+++ b/common_syms/battle_anim_throw.txt
@ -1,3 +0,0 @@
-gMonShrinkDuration
-gMonShrinkDelta
-gMonShrinkDistance
--- a/common_syms/battle_factory_screen.txt
+++ b/common_syms/battle_factory_screen.txt
@ -1 +0,0 @@
-gFactorySelect_CurrentOptionFunc
--- a/common_syms/battle_main.txt
+++ b/common_syms/battle_main.txt
@ -1,9 +0,0 @@
-gPreBattleCallback1
-gBattleMainFunc
-gBattleResults
-gLeveledUpInBattle
-gBattlerControllerFuncs
-gHealthboxSpriteIds
-gMultiUsePlayerCursor
-gNumberOfMovesToChoose
-gBattleControllerData
--- a/common_syms/battle_tower.txt
+++ b/common_syms/battle_tower.txt
@ -1 +0,0 @@
-gFrontierTempParty
--- a/common_syms/berry_blender.txt
+++ b/common_syms/berry_blender.txt
@ -1 +0,0 @@
-gInGameOpponentsNo
--- a/common_syms/bg.txt
+++ b/common_syms/bg.txt
@ -1 +0,0 @@
-gWindowTileAutoAllocEnabled
--- a/common_syms/contest.txt
+++ b/common_syms/contest.txt
@ -1 +0,0 @@
-gContestRngValue
--- a/common_syms/contest_painting.txt
+++ b/common_syms/contest_painting.txt
@ -1,4 +0,0 @@
-gContestMonPixels
-gImageProcessingContext
-gContestPaintingWinner
-gContestPaintingMonPalette
--- a/common_syms/ereader_screen.txt
+++ b/common_syms/ereader_screen.txt
@ -1,2 +0,0 @@
-gUnknownSpace
-gEReaderData
--- a/common_syms/evolution_scene.txt
+++ b/common_syms/evolution_scene.txt
@ -1 +0,0 @@
-gCB2_AfterEvolution
--- a/common_syms/faraway_island.txt
+++ b/common_syms/faraway_island.txt
@ -1,3 +0,0 @@
-sPlayerToMewDeltaX
-sPlayerToMewDeltaY
-sMewDirectionCandidates
--- a/common_syms/field_camera.txt
+++ b/common_syms/field_camera.txt
@ -1,3 +0,0 @@
-gFieldCamera
-gTotalCameraPixelOffsetY
-gTotalCameraPixelOffsetX
--- a/common_syms/field_control_avatar.txt
+++ b/common_syms/field_control_avatar.txt
@ -1 +0,0 @@
-gSelectedObjectEvent
--- a/common_syms/field_specials.txt
+++ b/common_syms/field_specials.txt
@ -1 +0,0 @@
-gScrollableMultichoice_ListMenuTemplate
--- a/common_syms/fieldmap.txt
+++ b/common_syms/fieldmap.txt
@ -1 +0,0 @@
-gBackupMapLayout
--- a/common_syms/image_processing_effects.txt
+++ b/common_syms/image_processing_effects.txt
@ -1,10 +0,0 @@
-gCanvasColumnStart
-gCanvasPixels
-gCanvasRowEnd
-gCanvasHeight
-gCanvasColumnEnd
-gCanvasRowStart
-gCanvasMonPersonality
-gCanvasWidth
-gCanvasPalette
-gCanvasPaletteStart
--- a/common_syms/intro.txt
+++ b/common_syms/intro.txt
@ -1,2 +0,0 @@
-gIntroFrameCounter
-gMultibootProgramStruct
--- a/common_syms/librfu_rfu.txt
+++ b/common_syms/librfu_rfu.txt
@ -1,5 +0,0 @@
-gRfuSlotStatusUNI
-gRfuSlotStatusNI
-gRfuLinkStatus
-gRfuStatic
-gRfuFixed
--- a/common_syms/librfu_sio32id.txt
+++ b/common_syms/librfu_sio32id.txt
@ -1 +0,0 @@
-gRfuSIO32Id
--- a/common_syms/librfu_stwi.txt
+++ b/common_syms/librfu_stwi.txt
@ -1 +0,0 @@
-gSTWIStatus
--- a/common_syms/link.txt
+++ b/common_syms/link.txt
@ -1,35 +0,0 @@
-gLinkPartnersHeldKeys
-gLinkDebugSeed
-gLocalLinkPlayerBlock
-gLinkErrorOccurred
-gLinkDebugFlags
-gLinkFiller1
-gRemoteLinkPlayersNotReceived
-gBlockReceivedStatus
-gLinkFiller2
-gLinkHeldKeys
-gRecvCmds
-gLinkStatus
-gLinkDummy1
-gLinkDummy2
-gReadyToExitStandby
-gReadyToCloseLink
-gReadyCloseLinkType
-gSuppressLinkErrorMessage
-gWirelessCommType
-gSavedLinkPlayerCount
-gSendCmd
-gSavedMultiplayerId
-gReceivedRemoteLinkPlayers
-gLinkTestBGInfo
-gLinkCallback
-gShouldAdvanceLinkState
-gLinkTestBlockChecksums
-gBlockRequestType
-gLinkFiller3
-gLinkFiller4
-gLinkFiller5
-gLastSendQueueCount
-gLink
-gLastRecvQueueCount
-gLinkSavedIme
--- a/common_syms/link_rfu_2.txt
+++ b/common_syms/link_rfu_2.txt
@ -1,2 +0,0 @@
-gRfuAPIBuffer
-gRfu
--- a/common_syms/list_menu.txt
+++ b/common_syms/list_menu.txt
@ -1,2 +0,0 @@
-gListMenuOverride
-gMultiuseListMenuTemplate
--- a/common_syms/load_save.txt
+++ b/common_syms/load_save.txt
@ -1,4 +0,0 @@
-gFlashMemoryPresent
-gSaveBlock1Ptr
-gSaveBlock2Ptr
-gPokemonStoragePtr
--- a/common_syms/m4a.txt
+++ b/common_syms/m4a.txt
@ -1,12 +0,0 @@
-gSoundInfo
-gPokemonCrySongs
-gPokemonCryMusicPlayers
-gMPlayInfo_BGM
-gMPlayJumpTable
-gCgbChans
-gMPlayInfo_SE1
-gMPlayInfo_SE2
-gPokemonCryTracks
-gPokemonCrySong
-gMPlayMemAccArea
-gMPlayInfo_SE3
--- a/common_syms/main.txt
+++ b/common_syms/main.txt
@ -1,9 +0,0 @@
-gKeyRepeatStartDelay
-gLinkTransferringData
-gMain
-gKeyRepeatContinueDelay
-gSoftResetDisabled
-gIntrTable
-gLinkVSyncDisabled
-IntrMain_Buffer
-gPcmDmaCounter
--- a/common_syms/mauville_old_man.txt
+++ b/common_syms/mauville_old_man.txt
@ -1 +0,0 @@
-gBardSong
--- a/common_syms/overworld.txt
+++ b/common_syms/overworld.txt
@ -1,8 +0,0 @@
-gOverworldTilemapBuffer_Bg2
-gOverworldTilemapBuffer_Bg1
-gOverworldTilemapBuffer_Bg3
-gHeldKeyCodeToSend
-gFieldCallback
-gFieldCallback2
-gLocalLinkPlayerId
-gFieldLinkPlayerCount
--- a/common_syms/party_menu.txt
+++ b/common_syms/party_menu.txt
@ -1 +0,0 @@
-gItemUseCB
--- a/common_syms/pokedex.txt
+++ b/common_syms/pokedex.txt
@ -1,2 +0,0 @@
-gUnusedPokedexU8
-gPokedexVBlankCB
--- a/common_syms/pokedex_cry_screen.txt
+++ b/common_syms/pokedex_cry_screen.txt
@ -1 +0,0 @@
-gDexCryScreenState
--- a/common_syms/random.txt
+++ b/common_syms/random.txt
@ -1,2 +0,0 @@
-gRngValue
-gRng2Value
--- a/common_syms/rtc.txt
+++ b/common_syms/rtc.txt
@ -1 +0,0 @@
-gLocalTime
--- a/common_syms/save.txt
+++ b/common_syms/save.txt
@ -1,13 +0,0 @@
-gLastWrittenSector
-gLastSaveCounter
-gLastKnownGoodSector
-gDamagedSaveSectors
-gSaveCounter
-gReadWriteSector
-gIncrementalSectorId
-gSaveUnusedVar
-gSaveFileStatus
-gGameContinueCallback
-gRamSaveSectorLocations
-gSaveUnusedVar2
-gSaveAttemptStatus
--- a/common_syms/sound.txt
+++ b/common_syms/sound.txt
@ -1 +0,0 @@
-gDisableMusic
--- a/common_syms/sprite.txt
+++ b/common_syms/sprite.txt
@ -1,2 +0,0 @@
-gOamMatrixAllocBitmap
-gReservedSpritePaletteCount
--- a/common_syms/start_menu.txt
+++ b/common_syms/start_menu.txt
@ -1 +0,0 @@
-gMenuCallback
--- a/common_syms/task.txt
+++ b/common_syms/task.txt
@ -1 +0,0 @@
-gTasks
--- a/common_syms/text.txt
+++ b/common_syms/text.txt
@ -1,4 +0,0 @@
-gFonts
-gDisableTextPrinters
-gCurGlyph
-gTextFlags
--- a/common_syms/trainer_see.txt
+++ b/common_syms/trainer_see.txt
@ -1,5 +0,0 @@
-gWhichTrainerToFaceAfterBattle
-gPostBattleMovementScript
-gApproachingTrainers
-gNoOfApproachingTrainers
-gTrainerApproachedPlayer
--- a/common_syms/tv.txt
+++ b/common_syms/tv.txt
@ -1,4 +0,0 @@
-sCurTVShowSlot
-sTV_SecretBaseVisitMovesTemp
-sTV_DecorationsBuffer
-sTV_SecretBaseVisitMonsTemp
--- a/common_syms/window.txt
+++ b/common_syms/window.txt
@ -1,2 +0,0 @@
-gTransparentTileNumber
-gWindowBgTilemapBuffers
--- a/include/gba/defines.h
+++ b/include/gba/defines.h
@ -8,6 +8,7 @@

 #define IWRAM_DATA __attribute__((section("iwram_data")))
 #define EWRAM_DATA __attribute__((section("ewram_data")))
+#define COMMON_DATA __attribute__((section("common_data")))
 #define UNUSED __attribute__((unused))

 #if MODERN
--- a/ld_script.ld
+++ b/ld_script.ld
@ -42,6 +42,7 @@ SECTIONS {

        /* COMMON starts at 0x30022A8 */
        INCLUDE "sym_common.ld"
+        src/*.o(COMMON);
        *libc.a:sbrkr.o(COMMON);
    } > IWRAM

--- a/ld_script_modern.ld
+++ b/ld_script_modern.ld
@ -28,6 +28,7 @@ SECTIONS {

        src/m4a.o(.bss.code);

+        src/*.o(common_data);
        src/*.o(COMMON);
        *libc.a:*.o(COMMON);
        *libnosys.a:*.o(COMMON);
--- a/src/AgbRfu_LinkManager.c
+++ b/src/AgbRfu_LinkManager.c
@ -14,7 +14,7 @@
 #define FSP_ON    0x01
 #define FSP_START 0x02

-LINK_MANAGER lman;
+COMMON_DATA LINK_MANAGER lman = {0};

 static void rfu_LMAN_clearVariables(void);
 static void rfu_LMAN_settingPCSWITCH(u32 rand);
--- a/src/agb_flash.c
+++ b/src/agb_flash.c
@ -6,16 +6,16 @@ static u16 sTimerCount;
 static vu16 *sTimerReg;
 static u16 sSavedIme;

-u8 gFlashTimeoutFlag;
-u8 (*PollFlashStatus)(u8 *);
-u16 (*WaitForFlashWrite)(u8 phase, u8 *addr, u8 lastData);
-u16 (*ProgramFlashSector)(u16 sectorNum, u8 *src);
-const struct FlashType *gFlash;
-u16 (*ProgramFlashByte)(u16 sectorNum, u32 offset, u8 data);
-u16 gFlashNumRemainingBytes;
-u16 (*EraseFlashChip)();
-u16 (*EraseFlashSector)(u16 sectorNum);
-const u16 *gFlashMaxTime;
+COMMON_DATA u8 gFlashTimeoutFlag = 0;
+COMMON_DATA u8 (*PollFlashStatus)(u8 *) = NULL;
+COMMON_DATA u16 (*WaitForFlashWrite)(u8 phase, u8 *addr, u8 lastData) = NULL;
+COMMON_DATA u16 (*ProgramFlashSector)(u16 sectorNum, u8 *src) = NULL;
+COMMON_DATA const struct FlashType *gFlash = NULL;
+COMMON_DATA u16 (*ProgramFlashByte)(u16 sectorNum, u32 offset, u8 data) = NULL;
+COMMON_DATA u16 gFlashNumRemainingBytes = 0;
+COMMON_DATA u16 (*EraseFlashChip)() = NULL;
+COMMON_DATA u16 (*EraseFlashSector)(u16 sectorNum) = 0;
+COMMON_DATA const u16 *gFlashMaxTime = NULL;

 void SetReadFlash1(u16 *dest);

--- a/src/apprentice.c
+++ b/src/apprentice.c
@ -75,9 +75,9 @@ struct ApprenticeQuestionData
 };

 // IWRAM common
-struct ApprenticePartyMovesData *gApprenticePartyMovesData;
-struct ApprenticeQuestionData *gApprenticeQuestionData;
-void (*gApprenticeFunc)(void);
+COMMON_DATA struct ApprenticePartyMovesData *gApprenticePartyMovesData = NULL;
+COMMON_DATA struct ApprenticeQuestionData *gApprenticeQuestionData = NULL;
+COMMON_DATA void (*gApprenticeFunc)(void) = NULL;

 // This file's functions.
 static u16 GetRandomAlternateMove(u8 monId);
--- a/src/battle_anim_throw.c
+++ b/src/battle_anim_throw.c
@ -23,9 +23,9 @@
 #include "constants/rgb.h"

 // iwram
-u32 gMonShrinkDuration;
-u16 gMonShrinkDelta;
-u16 gMonShrinkDistance;
+COMMON_DATA u32 gMonShrinkDuration = 0;
+COMMON_DATA u16 gMonShrinkDelta = 0;
+COMMON_DATA u16 gMonShrinkDistance = 0;

 enum {
    BALL_ROLL_1,
--- a/src/battle_factory_screen.c
+++ b/src/battle_factory_screen.c
@ -256,7 +256,7 @@ static struct FactorySelectScreen *sFactorySelectScreen;
 static void (*sSwap_CurrentOptionFunc)(u8 taskId);
 static struct FactorySwapScreen *sFactorySwapScreen;

-u8 (*gFactorySelect_CurrentOptionFunc)(void);
+COMMON_DATA u8 (*gFactorySelect_CurrentOptionFunc)(void) = NULL;

 static const u16 sPokeballGray_Pal[]         = INCBIN_U16("graphics/battle_frontier/factory_screen/pokeball_gray.gbapal");
 static const u16 sPokeballSelected_Pal[]     = INCBIN_U16("graphics/battle_frontier/factory_screen/pokeball_selected.gbapal");
--- a/src/battle_main.c
+++ b/src/battle_main.c
@ -237,15 +237,15 @@ EWRAM_DATA u16 gBattleMovePower = 0;
 EWRAM_DATA u16 gMoveToLearn = 0;
 EWRAM_DATA u8 gBattleMonForms[MAX_BATTLERS_COUNT] = {0};

-void (*gPreBattleCallback1)(void);
-void (*gBattleMainFunc)(void);
-struct BattleResults gBattleResults;
-u8 gLeveledUpInBattle;
-void (*gBattlerControllerFuncs[MAX_BATTLERS_COUNT])(void);
-u8 gHealthboxSpriteIds[MAX_BATTLERS_COUNT];
-u8 gMultiUsePlayerCursor;
-u8 gNumberOfMovesToChoose;
-u8 gBattleControllerData[MAX_BATTLERS_COUNT]; // Used by the battle controllers to store misc sprite/task IDs for each battler
+COMMON_DATA void (*gPreBattleCallback1)(void) = NULL;
+COMMON_DATA void (*gBattleMainFunc)(void) = NULL;
+COMMON_DATA struct BattleResults gBattleResults = {0};
+COMMON_DATA u8 gLeveledUpInBattle = 0;
+COMMON_DATA void (*gBattlerControllerFuncs[MAX_BATTLERS_COUNT])(void) = {0};
+COMMON_DATA u8 gHealthboxSpriteIds[MAX_BATTLERS_COUNT] = {0};
+COMMON_DATA u8 gMultiUsePlayerCursor = 0;
+COMMON_DATA u8 gNumberOfMovesToChoose = 0;
+COMMON_DATA u8 gBattleControllerData[MAX_BATTLERS_COUNT] = {0}; // Used by the battle controllers to store misc sprite/task IDs for each battler

 static const struct ScanlineEffectParams sIntroScanlineParams16Bit =
 {
--- a/src/battle_tower.c
+++ b/src/battle_tower.c
@ -45,7 +45,7 @@ EWRAM_DATA const struct BattleFrontierTrainer *gFacilityTrainers = NULL;
 EWRAM_DATA const struct FacilityMon *gFacilityTrainerMons = NULL;

 // IWRAM common
-u16 gFrontierTempParty[MAX_FRONTIER_PARTY_SIZE];
+COMMON_DATA u16 gFrontierTempParty[MAX_FRONTIER_PARTY_SIZE] = {0};

 // This file's functions.
 static void InitTowerChallenge(void);
--- a/src/berry_blender.c
+++ b/src/berry_blender.c
@ -246,7 +246,7 @@ static s16 sPokeblockPresentFlavors[FLAVOR_COUNT + 1];
 static s16 sDebug_MaxRPMStage;
 static s16 sDebug_GameTimeStage;

-u8 gInGameOpponentsNo;
+COMMON_DATA u8 gInGameOpponentsNo = 0;

 static const u16 sBlenderCenter_Pal[] = INCBIN_U16("graphics/berry_blender/center.gbapal");
 static const u8 sBlenderCenter_Tilemap[] = INCBIN_U8("graphics/berry_blender/center_map.bin");
--- a/src/bg.c
+++ b/src/bg.c
@ -42,7 +42,7 @@ static struct BgControl sGpuBgConfigs;
 static struct BgConfig2 sGpuBgConfigs2[NUM_BACKGROUNDS];
 static u32 sDmaBusyBitfield[NUM_BACKGROUNDS];

-u32 gWindowTileAutoAllocEnabled;
+COMMON_DATA u32 gWindowTileAutoAllocEnabled = 0;

 static const struct BgConfig sZeroedBgControlStruct = { 0 };

--- a/src/contest.c
+++ b/src/contest.c
@ -358,7 +358,7 @@ EWRAM_DATA bool8 gCurContestWinnerIsForArtist = 0;
 EWRAM_DATA u8 gCurContestWinnerSaveIdx = 0;

 // IWRAM common vars.
-u32 gContestRngValue;
+COMMON_DATA u32 gContestRngValue = 0;

 extern const u8 gText_LinkStandby4[];
 extern const u8 gText_BDot[];
--- a/src/contest_painting.c
+++ b/src/contest_painting.c
@ -21,10 +21,10 @@
 #include "window.h"
 #include "constants/rgb.h"

-u16 (*gContestMonPixels)[][32];
-struct ImageProcessingContext gImageProcessingContext;
-struct ContestWinner *gContestPaintingWinner;
-u16 *gContestPaintingMonPalette;
+COMMON_DATA u16 (*gContestMonPixels)[][32] = {0};
+COMMON_DATA struct ImageProcessingContext gImageProcessingContext = {0};
+COMMON_DATA struct ContestWinner *gContestPaintingWinner = {0};
+COMMON_DATA u16 *gContestPaintingMonPalette = NULL;

 static u8 sHoldState;
 static u16 sMosaicVal;
--- a/src/ereader_screen.c
+++ b/src/ereader_screen.c
@ -41,9 +41,9 @@ struct EReaderData
 static void Task_EReader(u8);

 // This belongs in COMMON somewhere between party_menu and ereader_screen, but it's unused so it's unclear where.
-UNUSED u8 gUnknownSpace[64];
+COMMON_DATA UNUSED u8 gUnknownSpace[64] = {0};

-struct EReaderData gEReaderData;
+COMMON_DATA struct EReaderData gEReaderData = {0};

 extern const u8 gMultiBootProgram_EReader_Start[];
 extern const u8 gMultiBootProgram_EReader_End[];
--- a/src/evolution_scene.c
+++ b/src/evolution_scene.c
@ -48,7 +48,7 @@ struct EvoInfo
 static EWRAM_DATA struct EvoInfo *sEvoStructPtr = NULL;
 static EWRAM_DATA u16 *sBgAnimPal = NULL;

-void (*gCB2_AfterEvolution)(void);
+COMMON_DATA void (*gCB2_AfterEvolution)(void) = NULL;

 #define sEvoCursorPos           gBattleCommunication[1] // when learning a new move
 #define sEvoGraphicsTaskId      gBattleCommunication[2]
--- a/src/field_camera.c
+++ b/src/field_camera.c
@ -39,9 +39,9 @@ static s16 sVerticalCameraPan;
 static bool8 sBikeCameraPanFlag;
 static void (*sFieldCameraPanningCallback)(void);

-struct CameraObject gFieldCamera;
-u16 gTotalCameraPixelOffsetY;
-u16 gTotalCameraPixelOffsetX;
+COMMON_DATA struct CameraObject gFieldCamera = {0};
+COMMON_DATA u16 gTotalCameraPixelOffsetY = 0;
+COMMON_DATA u16 gTotalCameraPixelOffsetX = 0;

 static void ResetCameraOffset(struct FieldCameraOffset *cameraOffset)
 {
--- a/src/field_control_avatar.c
+++ b/src/field_control_avatar.c
@ -38,7 +38,7 @@
 static EWRAM_DATA u8 sWildEncounterImmunitySteps = 0;
 static EWRAM_DATA u16 sPrevMetatileBehavior = 0;

-u8 gSelectedObjectEvent;
+COMMON_DATA u8 gSelectedObjectEvent = 0;

 static void GetPlayerPosition(struct MapPosition *);
 static void GetInFrontOfPlayerPosition(struct MapPosition *);
--- a/src/field_specials.c
+++ b/src/field_specials.c
@ -92,7 +92,7 @@ static EWRAM_DATA u8 sFrontierExchangeCorner_ItemIconWindowId = 0;
 static EWRAM_DATA u8 sPCBoxToSendMon = 0;
 static EWRAM_DATA u32 sBattleTowerMultiBattleTypeFlags = 0;

-struct ListMenuTemplate gScrollableMultichoice_ListMenuTemplate;
+COMMON_DATA struct ListMenuTemplate gScrollableMultichoice_ListMenuTemplate = {0};

 void TryLoseFansFromPlayTime(void);
 void SetPlayerGotFirstFans(void);
--- a/src/fieldmap.c
+++ b/src/fieldmap.c
@ -31,7 +31,7 @@ EWRAM_DATA struct Camera gCamera = {0};
 EWRAM_DATA static struct ConnectionFlags sMapConnectionFlags = {0};
 EWRAM_DATA static u32 UNUSED sFiller = 0; // without this, the next file won't align properly

-struct BackupMapLayout gBackupMapLayout;
+COMMON_DATA struct BackupMapLayout gBackupMapLayout = {0};

 static const struct ConnectionFlags sDummyConnectionFlags = {0};

--- a/src/image_processing_effects.c
+++ b/src/image_processing_effects.c
@ -4,16 +4,16 @@
 #include "constants/rgb.h"

 // IWRAM common
-u8 gCanvasColumnStart;
-u16 *gCanvasPixels;
-u8 gCanvasRowEnd;
-u8 gCanvasHeight;
-u8 gCanvasColumnEnd;
-u8 gCanvasRowStart;
-u8 gCanvasMonPersonality;
-u8 gCanvasWidth;
-u16 *gCanvasPalette;
-u16 gCanvasPaletteStart;
+COMMON_DATA u8 gCanvasColumnStart = 0;
+COMMON_DATA u16 *gCanvasPixels = NULL;
+COMMON_DATA u8 gCanvasRowEnd = 0;
+COMMON_DATA u8 gCanvasHeight = 0;
+COMMON_DATA u8 gCanvasColumnEnd = 0;
+COMMON_DATA u8 gCanvasRowStart = 0;
+COMMON_DATA u8 gCanvasMonPersonality = 0;
+COMMON_DATA u8 gCanvasWidth = 0;
+COMMON_DATA u16 *gCanvasPalette = NULL;
+COMMON_DATA u16 gCanvasPaletteStart = 0;

 static void ApplyImageEffect_Pointillism(void);
 static void ApplyImageEffect_Blur(void);
--- a/src/intro.c
+++ b/src/intro.c
@ -178,8 +178,8 @@ static EWRAM_DATA u16 sIntroCharacterGender = 0;
 static EWRAM_DATA u16 UNUSED sUnusedVar = 0;
 static EWRAM_DATA u16 sFlygonYOffset = 0;

-u32 gIntroFrameCounter;
-struct GcmbStruct gMultibootProgramStruct;
+COMMON_DATA u32 gIntroFrameCounter = 0;
+COMMON_DATA struct GcmbStruct gMultibootProgramStruct = {0};

 static const u16 sIntroDrops_Pal[]            = INCBIN_U16("graphics/intro/scene_1/drops.gbapal");
 static const u16 sIntroLogo_Pal[]             = INCBIN_U16("graphics/intro/scene_1/logo.gbapal");
--- a/src/librfu_rfu.c
+++ b/src/librfu_rfu.c
@ -76,11 +76,11 @@ static void rfu_STC_NI_receive_Sender(u8, u8, const struct RfuLocalStruct *, UNU
 static void rfu_STC_NI_initSlot_asRecvDataEntity(u8, struct NIComm *);
 static void rfu_STC_NI_initSlot_asRecvControllData(u8, struct NIComm *);

-struct RfuSlotStatusUNI *gRfuSlotStatusUNI[RFU_CHILD_MAX];
-struct RfuSlotStatusNI *gRfuSlotStatusNI[RFU_CHILD_MAX];
-struct RfuLinkStatus *gRfuLinkStatus;
-struct RfuStatic *gRfuStatic;
-struct RfuFixed *gRfuFixed;
+COMMON_DATA struct RfuSlotStatusUNI *gRfuSlotStatusUNI[RFU_CHILD_MAX] = {0};
+COMMON_DATA struct RfuSlotStatusNI *gRfuSlotStatusNI[RFU_CHILD_MAX] = {0};
+COMMON_DATA struct RfuLinkStatus *gRfuLinkStatus = NULL;
+COMMON_DATA struct RfuStatic *gRfuStatic = NULL;
+COMMON_DATA struct RfuFixed *gRfuFixed = NULL;

 static const struct LLSFStruct llsf_struct[2] = {
    [MODE_CHILD] = {
--- a/src/librfu_sio32id.c
+++ b/src/librfu_sio32id.c
@ -15,7 +15,7 @@ struct RfuSIO32Id
    u16 lastId;
 };

-struct RfuSIO32Id gRfuSIO32Id;
+COMMON_DATA struct RfuSIO32Id gRfuSIO32Id = {0};

 static const u16 Sio32ConnectionData[] = { 0x494e, 0x544e, 0x4e45, 0x4f44 }; // NINTENDO
 static const char Sio32IDLib_Var[] = "Sio32ID_030820";
--- a/src/librfu_stwi.c
+++ b/src/librfu_stwi.c
@ -8,7 +8,7 @@ static void STWI_stop_timer(void);
 static s32 STWI_restart_Command(void);
 static s32 STWI_reset_ClockCounter(void);

-struct STWIStatus *gSTWIStatus;
+COMMON_DATA struct STWIStatus *gSTWIStatus = NULL;

 void STWI_init_all(struct RfuIntrStruct *interruptStruct, IntrFunc *interrupt, bool8 copyInterruptToRam)
 {
--- a/src/link.c
+++ b/src/link.c
@ -68,41 +68,41 @@ static u16 sRecvNonzeroCheck;
 static u8 sChecksumAvailable;
 static u8 sHandshakePlayerCount;

-u16 gLinkPartnersHeldKeys[6];
-u32 gLinkDebugSeed;
-struct LinkPlayerBlock gLocalLinkPlayerBlock;
-bool8 gLinkErrorOccurred;
-u32 gLinkDebugFlags;
-u32 gLinkFiller1;
-bool8 gRemoteLinkPlayersNotReceived[MAX_LINK_PLAYERS];
-u8 gBlockReceivedStatus[MAX_LINK_PLAYERS];
-u32 gLinkFiller2;
-u16 gLinkHeldKeys;
-u16 ALIGNED(4) gRecvCmds[MAX_RFU_PLAYERS][CMD_LENGTH];
-u32 gLinkStatus;
-bool8 gLinkDummy1; // Never read
-bool8 gLinkDummy2; // Never read
-bool8 gReadyToExitStandby[MAX_LINK_PLAYERS];
-bool8 gReadyToCloseLink[MAX_LINK_PLAYERS];
-u16 gReadyCloseLinkType; // Never read
-u8 gSuppressLinkErrorMessage;
-bool8 gWirelessCommType;
-bool8 gSavedLinkPlayerCount;
-u16 gSendCmd[CMD_LENGTH];
-u8 gSavedMultiplayerId;
-bool8 gReceivedRemoteLinkPlayers;
-struct LinkTestBGInfo gLinkTestBGInfo;
-void (*gLinkCallback)(void);
-u8 gShouldAdvanceLinkState;
-u16 gLinkTestBlockChecksums[MAX_LINK_PLAYERS];
-u8 gBlockRequestType;
-u32 gLinkFiller3;
-u32 gLinkFiller4;
-u32 gLinkFiller5;
-u8 gLastSendQueueCount;
-struct Link gLink;
-u8 gLastRecvQueueCount;
-u16 gLinkSavedIme;
+COMMON_DATA u16 gLinkPartnersHeldKeys[6] = {0};
+COMMON_DATA u32 gLinkDebugSeed = 0;
+COMMON_DATA struct LinkPlayerBlock gLocalLinkPlayerBlock = {0};
+COMMON_DATA bool8 gLinkErrorOccurred = 0;
+COMMON_DATA u32 gLinkDebugFlags = 0;
+COMMON_DATA u32 gLinkFiller1 = 0;
+COMMON_DATA bool8 gRemoteLinkPlayersNotReceived[MAX_LINK_PLAYERS] = {0};
+COMMON_DATA u8 gBlockReceivedStatus[MAX_LINK_PLAYERS] = {0};
+COMMON_DATA u32 gLinkFiller2 = 0;
+COMMON_DATA u16 gLinkHeldKeys = 0;
+COMMON_DATA u16 ALIGNED(4) gRecvCmds[MAX_RFU_PLAYERS][CMD_LENGTH] = {0};
+COMMON_DATA u32 gLinkStatus = 0;
+COMMON_DATA bool8 gLinkDummy1 = 0; // Never read
+COMMON_DATA bool8 gLinkDummy2 = 0; // Never read
+COMMON_DATA bool8 gReadyToExitStandby[MAX_LINK_PLAYERS] = {0};
+COMMON_DATA bool8 gReadyToCloseLink[MAX_LINK_PLAYERS] = {0};
+COMMON_DATA u16 gReadyCloseLinkType = 0; // Never read
+COMMON_DATA u8 gSuppressLinkErrorMessage = 0;
+COMMON_DATA bool8 gWirelessCommType = 0;
+COMMON_DATA bool8 gSavedLinkPlayerCount = 0;
+COMMON_DATA u16 gSendCmd[CMD_LENGTH] = {0};
+COMMON_DATA u8 gSavedMultiplayerId = 0;
+COMMON_DATA bool8 gReceivedRemoteLinkPlayers = 0;
+COMMON_DATA struct LinkTestBGInfo gLinkTestBGInfo = {0};
+COMMON_DATA void (*gLinkCallback)(void) = NULL;
+COMMON_DATA u8 gShouldAdvanceLinkState = 0;
+COMMON_DATA u16 gLinkTestBlockChecksums[MAX_LINK_PLAYERS] = {0};
+COMMON_DATA u8 gBlockRequestType = 0;
+COMMON_DATA u32 gLinkFiller3 = 0;
+COMMON_DATA u32 gLinkFiller4 = 0;
+COMMON_DATA u32 gLinkFiller5 = 0;
+COMMON_DATA u8 gLastSendQueueCount = 0;
+COMMON_DATA struct Link gLink = {0};
+COMMON_DATA u8 gLastRecvQueueCount = 0;
+COMMON_DATA u16 gLinkSavedIme = 0;

 static EWRAM_DATA u8 sLinkTestDebugValuesEnabled = 0;
 static EWRAM_DATA u8 sDummyFlag = FALSE;
--- a/src/link_rfu_2.c
+++ b/src/link_rfu_2.c
@ -77,8 +77,8 @@ struct RfuDebug
    u8 unused4[88];
 };

-u32 gRfuAPIBuffer[RFU_API_BUFF_SIZE_RAM / 4];
-struct RfuManager gRfu;
+COMMON_DATA u32 gRfuAPIBuffer[RFU_API_BUFF_SIZE_RAM / 4] = {0};
+COMMON_DATA struct RfuManager gRfu = {0};

 static u8 sHeldKeyCount;
 static u8 sResendBlock8[CMD_LENGTH * 2];
--- a/src/list_menu.c
+++ b/src/list_menu.c
@ -99,7 +99,7 @@ static EWRAM_DATA struct {
 EWRAM_DATA struct ScrollArrowsTemplate gTempScrollArrowTemplate = {0};

 // IWRAM common
-struct {
+COMMON_DATA struct {
    u8 cursorPal:4;
    u8 fillValue:4;
    u8 cursorShadowPal:4;
@ -107,9 +107,9 @@ struct {
    u8 field_2_2:6; // unused
    u8 fontId:7;
    bool8 enabled:1;
-} gListMenuOverride;
+} gListMenuOverride = {0};

-struct ListMenuTemplate gMultiuseListMenuTemplate;
+COMMON_DATA struct ListMenuTemplate gMultiuseListMenuTemplate = {0};

 // const rom data
 static const struct
--- a/src/load_save.c
+++ b/src/load_save.c
@ -37,10 +37,10 @@ EWRAM_DATA struct LoadedSaveData gLoadedSaveData = {0};
 EWRAM_DATA u32 gLastEncryptionKey = 0;

 // IWRAM common
-bool32 gFlashMemoryPresent;
-struct SaveBlock1 *gSaveBlock1Ptr;
-struct SaveBlock2 *gSaveBlock2Ptr;
-struct PokemonStorage *gPokemonStoragePtr;
+COMMON_DATA bool32 gFlashMemoryPresent = 0;
+COMMON_DATA struct SaveBlock1 *gSaveBlock1Ptr = NULL;
+COMMON_DATA struct SaveBlock2 *gSaveBlock2Ptr = NULL;
+COMMON_DATA struct PokemonStorage *gPokemonStoragePtr = NULL;

 // code
 void CheckForFlashMemory(void)
--- a/src/m4a.c
+++ b/src/m4a.c
@ -7,18 +7,18 @@ extern const u8 gCgb3Vol[];

 BSS_CODE ALIGNED(4) char SoundMainRAM_Buffer[0x800] = {0};

-struct SoundInfo gSoundInfo;
-struct PokemonCrySong gPokemonCrySongs[MAX_POKEMON_CRIES];
-struct MusicPlayerInfo gPokemonCryMusicPlayers[MAX_POKEMON_CRIES];
-MPlayFunc gMPlayJumpTable[36];
-struct CgbChannel gCgbChans[4];
-struct MusicPlayerTrack gPokemonCryTracks[MAX_POKEMON_CRIES * 2];
-struct PokemonCrySong gPokemonCrySong;
-struct MusicPlayerInfo gMPlayInfo_BGM;
-struct MusicPlayerInfo gMPlayInfo_SE1;
-struct MusicPlayerInfo gMPlayInfo_SE2;
-struct MusicPlayerInfo gMPlayInfo_SE3;
-u8 gMPlayMemAccArea[0x10];
+COMMON_DATA struct SoundInfo gSoundInfo = {0};
+COMMON_DATA struct PokemonCrySong gPokemonCrySongs[MAX_POKEMON_CRIES] = {0};
+COMMON_DATA struct MusicPlayerInfo gPokemonCryMusicPlayers[MAX_POKEMON_CRIES] = {0};
+COMMON_DATA struct MusicPlayerInfo gMPlayInfo_BGM = {0};
+COMMON_DATA MPlayFunc gMPlayJumpTable[36] = {0};
+COMMON_DATA struct CgbChannel gCgbChans[4] = {0};
+COMMON_DATA struct MusicPlayerInfo gMPlayInfo_SE1 = {0};
+COMMON_DATA struct MusicPlayerInfo gMPlayInfo_SE2 = {0};
+COMMON_DATA struct MusicPlayerTrack gPokemonCryTracks[MAX_POKEMON_CRIES * 2] = {0};
+COMMON_DATA struct PokemonCrySong gPokemonCrySong = {0};
+COMMON_DATA u8 gMPlayMemAccArea[0x10] = {0};
+COMMON_DATA struct MusicPlayerInfo gMPlayInfo_SE3 = {0};

 u32 MidiKeyToFreq(struct WaveData *wav, u8 key, u8 fineAdjust)
 {
--- a/src/main.c
+++ b/src/main.c
@ -59,15 +59,15 @@ const IntrFunc gIntrTableTemplate[] =

 static u16 sUnusedVar; // Never read

-u16 gKeyRepeatStartDelay;
-bool8 gLinkTransferringData;
-struct Main gMain;
-u16 gKeyRepeatContinueDelay;
-bool8 gSoftResetDisabled;
-IntrFunc gIntrTable[INTR_COUNT];
-u8 gLinkVSyncDisabled;
-u32 IntrMain_Buffer[0x200];
-s8 gPcmDmaCounter;
+COMMON_DATA u16 gKeyRepeatStartDelay = 0;
+COMMON_DATA bool8 gLinkTransferringData = 0;
+COMMON_DATA struct Main gMain = {0};
+COMMON_DATA u16 gKeyRepeatContinueDelay = 0;
+COMMON_DATA bool8 gSoftResetDisabled = 0;
+COMMON_DATA IntrFunc gIntrTable[INTR_COUNT] = {0};
+COMMON_DATA u8 gLinkVSyncDisabled = 0;
+COMMON_DATA u32 IntrMain_Buffer[0x200] = {0};
+COMMON_DATA s8 gPcmDmaCounter = 0;

 static EWRAM_DATA u16 sTrainerId = 0;

--- a/src/mauville_old_man.c
+++ b/src/mauville_old_man.c
@ -31,7 +31,7 @@ static void Storyteller_ResetFlag(void);

 static u8 sSelectedStory;

-struct BardSong gBardSong;
+COMMON_DATA struct BardSong gBardSong = {0};

 static EWRAM_DATA u16 sUnknownBardRelated = 0;
 static EWRAM_DATA struct MauvilleManStoryteller * sStorytellerPtr = NULL;
--- a/src/overworld.c
+++ b/src/overworld.c
@ -180,14 +180,14 @@ static u16 (*sPlayerKeyInterceptCallback)(u32);
 static bool8 sReceivingFromLink;
 static u8 sRfuKeepAliveTimer;

-u16 *gOverworldTilemapBuffer_Bg2;
-u16 *gOverworldTilemapBuffer_Bg1;
-u16 *gOverworldTilemapBuffer_Bg3;
-u16 gHeldKeyCodeToSend;
-void (*gFieldCallback)(void);
-bool8 (*gFieldCallback2)(void);
-u8 gLocalLinkPlayerId; // This is our player id in a multiplayer mode.
-u8 gFieldLinkPlayerCount;
+COMMON_DATA u16 *gOverworldTilemapBuffer_Bg2 = NULL;
+COMMON_DATA u16 *gOverworldTilemapBuffer_Bg1 = NULL;
+COMMON_DATA u16 *gOverworldTilemapBuffer_Bg3 = NULL;
+COMMON_DATA u16 gHeldKeyCodeToSend = 0;
+COMMON_DATA void (*gFieldCallback)(void) = NULL;
+COMMON_DATA bool8 (*gFieldCallback2)(void) = NULL;
+COMMON_DATA u8 gLocalLinkPlayerId = 0; // This is our player id in a multiplayer mode.
+COMMON_DATA u8 gFieldLinkPlayerCount = 0;

 EWRAM_DATA static u8 sObjectEventLoadFlag = 0;
 EWRAM_DATA struct WarpData gLastUsedWarp = {0};
--- a/src/party_menu.c
+++ b/src/party_menu.c
@ -231,7 +231,7 @@ static EWRAM_DATA u16 sUnused = 0;
 EWRAM_DATA u8 gBattlePartyCurrentOrder[PARTY_SIZE / 2] = {0}; // bits 0-3 are the current pos of Slot 1, 4-7 are Slot 2, and so on

 // IWRAM common
-void (*gItemUseCB)(u8, TaskFunc);
+COMMON_DATA void (*gItemUseCB)(u8, TaskFunc) = NULL;

 static void ResetPartyMenu(void);
 static void CB2_InitPartyMenu(void);
--- a/src/pokedex.c
+++ b/src/pokedex.c
@ -121,8 +121,8 @@ static EWRAM_DATA u8 sPokeBallRotation = 0;
 static EWRAM_DATA struct PokedexListItem *sPokedexListItem = NULL;

 // This is written to, but never read.
-u8 gUnusedPokedexU8;
-void (*gPokedexVBlankCB)(void);
+COMMON_DATA u8 gUnusedPokedexU8 = 0;
+COMMON_DATA void (*gPokedexVBlankCB)(void) = NULL;

 struct SearchOptionText
 {
--- a/src/pokedex_cry_screen.c
+++ b/src/pokedex_cry_screen.c
@ -60,7 +60,7 @@ static void SpriteCB_CryMeterNeedle(struct Sprite *);
 static void SetCryMeterNeedleTarget(s8);

 // IWRAM common
-u8 gDexCryScreenState;
+COMMON_DATA u8 gDexCryScreenState = 0;

 // EWRAM vars
 static EWRAM_DATA struct PokedexCryScreen *sDexCryScreen = NULL;
--- a/src/random.c
+++ b/src/random.c
@ -5,8 +5,8 @@ EWRAM_DATA static u8 sUnknown = 0;
 EWRAM_DATA static u32 sRandCount = 0;

 // IWRAM common
-u32 gRngValue;
-u32 gRng2Value;
+COMMON_DATA u32 gRngValue = 0;
+COMMON_DATA u32 gRng2Value = 0;

 u16 Random(void)
 {
--- a/src/rtc.c
+++ b/src/rtc.c
@ -10,7 +10,7 @@ static u8 sProbeResult;
 static u16 sSavedIme;

 // iwram common
-struct Time gLocalTime;
+COMMON_DATA struct Time gLocalTime = {0};

 // const rom

--- a/src/save.c
+++ b/src/save.c
@ -79,19 +79,19 @@ STATIC_ASSERT(sizeof(struct SaveBlock2) <= SECTOR_DATA_SIZE, SaveBlock2FreeSpace
 STATIC_ASSERT(sizeof(struct SaveBlock1) <= SECTOR_DATA_SIZE * (SECTOR_ID_SAVEBLOCK1_END - SECTOR_ID_SAVEBLOCK1_START + 1), SaveBlock1FreeSpace);
 STATIC_ASSERT(sizeof(struct PokemonStorage) <= SECTOR_DATA_SIZE * (SECTOR_ID_PKMN_STORAGE_END - SECTOR_ID_PKMN_STORAGE_START + 1), PokemonStorageFreeSpace);

-u16 gLastWrittenSector;
-u32 gLastSaveCounter;
-u16 gLastKnownGoodSector;
-u32 gDamagedSaveSectors;
-u32 gSaveCounter;
-struct SaveSector *gReadWriteSector; // Pointer to a buffer for reading/writing a sector
-u16 gIncrementalSectorId;
-u16 gSaveUnusedVar;
-u16 gSaveFileStatus;
-void (*gGameContinueCallback)(void);
-struct SaveSectorLocation gRamSaveSectorLocations[NUM_SECTORS_PER_SLOT];
-u16 gSaveUnusedVar2;
-u16 gSaveAttemptStatus;
+COMMON_DATA u16 gLastWrittenSector = 0;
+COMMON_DATA u32 gLastSaveCounter = 0;
+COMMON_DATA u16 gLastKnownGoodSector = 0;
+COMMON_DATA u32 gDamagedSaveSectors = 0;
+COMMON_DATA u32 gSaveCounter = 0;
+COMMON_DATA struct SaveSector *gReadWriteSector = NULL; // Pointer to a buffer for reading/writing a sector
+COMMON_DATA u16 gIncrementalSectorId = 0;
+COMMON_DATA u16 gSaveUnusedVar = 0;
+COMMON_DATA u16 gSaveFileStatus = 0;
+COMMON_DATA void (*gGameContinueCallback)(void) = NULL;
+COMMON_DATA struct SaveSectorLocation gRamSaveSectorLocations[NUM_SECTORS_PER_SLOT] = {0};
+COMMON_DATA u16 gSaveUnusedVar2 = 0;
+COMMON_DATA u16 gSaveAttemptStatus = 0;

 EWRAM_DATA struct SaveSector gSaveDataBuffer = {0}; // Buffer used for reading/writing sectors
 EWRAM_DATA static u8 sUnusedVar = 0;
--- a/src/sound.c
+++ b/src/sound.c
@ -23,7 +23,7 @@ static u8 sMapMusicState;
 static u8 sMapMusicFadeInSpeed;
 static u16 sFanfareCounter;

-bool8 gDisableMusic;
+COMMON_DATA bool8 gDisableMusic = 0;

 extern struct ToneData gCryTable[];
 extern struct ToneData gCryTable_Reverse[];
--- a/src/sprite.c
+++ b/src/sprite.c
@ -276,8 +276,8 @@ static struct AffineAnimState sAffineAnimStates[OAM_MATRIX_COUNT];
 static u16 sSpritePaletteTags[16];

 // iwram common
-u32 gOamMatrixAllocBitmap;
-u8 gReservedSpritePaletteCount;
+COMMON_DATA u32 gOamMatrixAllocBitmap = 0;
+COMMON_DATA u8 gReservedSpritePaletteCount = 0;

 EWRAM_DATA struct Sprite gSprites[MAX_SPRITES + 1] = {0};
 EWRAM_DATA static u16 sSpritePriorities[MAX_SPRITES] = {0};
--- a/src/start_menu.c
+++ b/src/start_menu.c
@ -75,7 +75,7 @@ enum
 };

 // IWRAM common
-bool8 (*gMenuCallback)(void);
+COMMON_DATA bool8 (*gMenuCallback)(void) = NULL;

 // EWRAM
 EWRAM_DATA static u8 sSafariBallsWindowId = 0;
--- a/src/task.c
+++ b/src/task.c
@ -1,7 +1,7 @@
 #include "global.h"
 #include "task.h"

-struct Task gTasks[NUM_TASKS];
+COMMON_DATA struct Task gTasks[NUM_TASKS] = {0};

 static void InsertTask(u8 newTaskId);
 static u8 FindFirstActiveTask(void);
--- a/src/text.c
+++ b/src/text.c
@ -43,10 +43,10 @@ static u16 sLastTextBgColor;
 static u16 sLastTextFgColor;
 static u16 sLastTextShadowColor;

-const struct FontInfo *gFonts;
-bool8 gDisableTextPrinters;
-struct TextGlyph gCurGlyph;
-TextFlags gTextFlags;
+COMMON_DATA const struct FontInfo *gFonts = NULL;
+COMMON_DATA bool8 gDisableTextPrinters = 0;
+COMMON_DATA struct TextGlyph gCurGlyph = {0};
+COMMON_DATA TextFlags gTextFlags = {0};

 static const u8 sFontHalfRowOffsets[] =
 {
--- a/src/trainer_see.c
+++ b/src/trainer_see.c
@ -49,11 +49,11 @@ static bool8 WaitRevealBuriedTrainer(u8 taskId, struct Task *task, struct Object
 static void SpriteCB_TrainerIcons(struct Sprite *sprite);

 // IWRAM common
-u16 gWhichTrainerToFaceAfterBattle;
-u8 gPostBattleMovementScript[4];
-struct ApproachingTrainer gApproachingTrainers[2];
-u8 gNoOfApproachingTrainers;
-bool8 gTrainerApproachedPlayer;
+COMMON_DATA u16 gWhichTrainerToFaceAfterBattle = 0;
+COMMON_DATA u8 gPostBattleMovementScript[4] = {0};
+COMMON_DATA struct ApproachingTrainer gApproachingTrainers[2] = {0};
+COMMON_DATA u8 gNoOfApproachingTrainers = 0;
+COMMON_DATA bool8 gTrainerApproachedPlayer = 0;

 // EWRAM
 EWRAM_DATA u8 gApproachingTrainerId = 0;
--- a/src/tv.c
+++ b/src/tv.c
@ -63,14 +63,14 @@ enum {
    ROULETTE,
 };

-s8 sCurTVShowSlot;
-u16 sTV_SecretBaseVisitMovesTemp[8];
-u8 sTV_DecorationsBuffer[DECOR_MAX_SECRET_BASE];
-struct {
+COMMON_DATA s8 sCurTVShowSlot = 0;
+COMMON_DATA u16 sTV_SecretBaseVisitMovesTemp[8] = {0};
+COMMON_DATA u8 sTV_DecorationsBuffer[DECOR_MAX_SECRET_BASE] = {0};
+COMMON_DATA struct {
    u8 level;
    u16 species;
    u16 move;
-} sTV_SecretBaseVisitMonsTemp[10];
+} sTV_SecretBaseVisitMonsTemp[10] = {0};

 static u8 sTVShowMixingNumPlayers;
 static u8 sTVShowNewsMixingNumPlayers;
--- a/src/window.c
+++ b/src/window.c
@ -5,8 +5,8 @@
 #include "blit.h"

 // This global is set to 0 and never changed.
-u8 gTransparentTileNumber;
-void *gWindowBgTilemapBuffers[NUM_BACKGROUNDS];
+COMMON_DATA u8 gTransparentTileNumber = 0;
+COMMON_DATA void *gWindowBgTilemapBuffers[NUM_BACKGROUNDS] = {0};
 extern u32 gWindowTileAutoAllocEnabled;

 EWRAM_DATA struct Window gWindows[WINDOWS_MAX] = {0};
--- a/tools/ramscrgen/elf.cpp
+++ b/tools/ramscrgen/elf.cpp
@ -1,7 +1,6 @@
 #include <cstdio>
 #include <cstring>
 #include <cstdint>
-#include <map>
 #include <vector>
 #include <string>
 #include "ramscrgen.h"
@ -22,6 +21,7 @@ static int s_shstrtabIndex;

 static std::uint32_t s_symtabOffset;
 static std::uint32_t s_strtabOffset;
+static std::uint32_t s_pseudoCommonSectionIndex;

 static std::uint32_t s_symbolCount;
 static std::uint32_t s_elfFileOffset;
@ -101,18 +101,6 @@ static void VerifyElfIdent()
        FATAL_ERROR("error: \"%s\" not little-endian ELF\n", s_elfPath.c_str());
 }

-static void VerifyAr()
-{
-    char expectedMagic[8] = {'!', '<', 'a', 'r', 'c', 'h', '>', '\n'};
-    char magic[8];
-
-    if (std::fread(magic, 8, 1, s_file) != 1)
-        FATAL_ERROR("error: failed to read AR magic from \"%s\"\n", s_archiveFilePath.c_str());
-
-    if (std::memcmp(magic, expectedMagic, 8) != 0)
-        FATAL_ERROR("error: AR magic did not match in \"%s\"\n", s_archiveFilePath.c_str());
-}
-
 static void ReadElfHeader()
 {
    Seek(0x20);
@ -123,40 +111,6 @@ static void ReadElfHeader()
    s_shstrtabIndex = ReadInt16();
 }

-static void FindArObj()
-{
-    char file_ident[17] = {0};
-    char filesize_s[11] = {0};
-    char expectedEndMagic[2] = { 0x60, 0x0a };
-    char end_magic[2];
-    std::size_t filesize;
-
-    Seek(8);
-    while (!std::feof(s_file)) {
-        if (std::fread(file_ident, 16, 1, s_file) != 1)
-            FATAL_ERROR("error: failed to read file ident in \"%s\"\n", s_archiveFilePath.c_str());
-        Skip(32);
-        if (std::fread(filesize_s, 10, 1, s_file) != 1)
-            FATAL_ERROR("error: failed to read filesize in \"%s\"\n", s_archiveFilePath.c_str());
-        if (std::fread(end_magic, 2, 1, s_file) != 1)
-            FATAL_ERROR("error: failed to read end sentinel in \"%s\"\n", s_archiveFilePath.c_str());
-        if (std::memcmp(end_magic, expectedEndMagic, 2) != 0)
-            FATAL_ERROR("error: corrupted archive header in \"%s\" at \"%s\"\n", s_archiveFilePath.c_str(), file_ident);
-
-        char * ptr = std::strchr(file_ident, '/');
-        if (ptr != nullptr)
-            *ptr = 0;
-        filesize = std::strtoul(filesize_s, nullptr, 10);
-        if (std::strncmp(s_archiveObjectPath.c_str(), file_ident, 16) == 0) {
-            s_elfFileOffset = std::ftell(s_file);
-            return;
-        }
-        Skip(filesize);
-    }
-
-    FATAL_ERROR("error: could not find object \"%s\" in archive \"%s\"\n", s_archiveObjectPath.c_str(), s_archiveFilePath.c_str());
-}
-
 static std::string GetSectionName(std::uint32_t shstrtabOffset, int index)
 {
    Seek(s_sectionHeaderOffset + s_sectionHeaderEntrySize * index);
@ -169,6 +123,7 @@ static void FindTableOffsets()
 {
    s_symtabOffset = 0;
    s_strtabOffset = 0;
+    s_pseudoCommonSectionIndex = 0;

    Seek(s_sectionHeaderOffset + s_sectionHeaderEntrySize * s_shstrtabIndex + 0x10);
    std::uint32_t shstrtabOffset = ReadInt32();
@ -192,6 +147,11 @@ static void FindTableOffsets()
                FATAL_ERROR("error: mutiple .strtab sections found in \"%s\"\n", s_elfPath.c_str());
            Seek(s_sectionHeaderOffset + s_sectionHeaderEntrySize * i + 0x10);
            s_strtabOffset = ReadInt32();
+        } else if (name == "common_data") {
+            if (s_pseudoCommonSectionIndex) {
+                FATAL_ERROR("error: mutiple common_data sections found in \"%s\"\n", s_elfPath.c_str());
+            }
+            s_pseudoCommonSectionIndex = i;
        }
    }

@ -202,65 +162,50 @@ static void FindTableOffsets()
        FATAL_ERROR("error: couldn't find .strtab section in \"%s\"\n", s_elfPath.c_str());
 }

-static std::map<std::string, std::uint32_t> GetCommonSymbols_Shared()
+static std::vector<std::pair<std::string, std::uint32_t>> GetCommonSymbols_Shared()
 {
    VerifyElfIdent();
    ReadElfHeader();
    FindTableOffsets();

-    std::map<std::string, std::uint32_t> commonSymbols;
+    std::vector<std::pair<std::string, std::uint32_t>> commonSymbols;

-    std::vector<Symbol> commonSymbolVec;
-
-    Seek(s_symtabOffset);
-
-    for (std::uint32_t i = 0; i < s_symbolCount; i++)
-    {
-        Symbol sym;
-        sym.nameOffset = ReadInt32();
-        Skip(4);
-        sym.size = ReadInt32();
-        Skip(2);
-        std::uint16_t sectionIndex = ReadInt16();
-        if (sectionIndex == SHN_COMMON)
-            commonSymbolVec.push_back(sym);
-    }
-
-    for (const Symbol& sym : commonSymbolVec)
-    {
-        Seek(s_strtabOffset + sym.nameOffset);
-        std::string name = ReadString();
-        commonSymbols[name] = sym.size;
+    if (s_pseudoCommonSectionIndex) {
+        std::vector<Symbol> commonSymbolVec;
+    
+        Seek(s_symtabOffset);
+    
+        for (std::uint32_t i = 0; i < s_symbolCount; i++)
+        {
+            Symbol sym;
+            sym.nameOffset = ReadInt32();
+            Skip(4);
+            sym.size = ReadInt32();
+            Skip(2);
+            std::uint16_t sectionIndex = ReadInt16();
+            if (sectionIndex == s_pseudoCommonSectionIndex)
+                commonSymbolVec.push_back(sym);
+        }
+    
+        for (const Symbol& sym : commonSymbolVec)
+        {
+            Seek(s_strtabOffset + sym.nameOffset);
+            std::string name = ReadString();
+            if (name == "$d" || name == "") {
+                continue;
+            }
+            commonSymbols.emplace_back(name, sym.size);
+        }
    }

    return commonSymbols;
 }

-std::map<std::string, std::uint32_t> GetCommonSymbolsFromLib(std::string sourcePath, std::string libpath)
-{
-    std::size_t colonPos = libpath.find(':');
-    if (colonPos == std::string::npos)
-        FATAL_ERROR("error: missing colon separator in libfile \"%s\"\n", s_elfPath.c_str());
-
-    s_archiveObjectPath = libpath.substr(colonPos + 1);
-    s_archiveFilePath = sourcePath + "/" + libpath.substr(1, colonPos - 1);
-    s_elfPath = sourcePath + "/" + libpath.substr(1);
-
-    s_file = std::fopen(s_archiveFilePath.c_str(), "rb");
-
-    if (s_file == NULL)
-        FATAL_ERROR("error: failed to open \"%s\" for reading\n", s_archiveFilePath.c_str());
-
-    VerifyAr();
-    FindArObj();
-    return GetCommonSymbols_Shared();
-}
-
-std::map<std::string, std::uint32_t> GetCommonSymbols(std::string sourcePath, std::string path)
+std::vector<std::pair<std::string, std::uint32_t>> GetCommonSymbols(std::string sourcePath, std::string path)
 {
    s_elfFileOffset = 0;
    if (path[0] == '*')
-        return GetCommonSymbolsFromLib(sourcePath, path);
+        FATAL_ERROR("error: library common syms are unsupported (filename: \"%s\")\n", path.c_str());

    s_elfPath = sourcePath + "/" + path;
    s_file = std::fopen(s_elfPath.c_str(), "rb");
--- a/tools/ramscrgen/elf.h
+++ b/tools/ramscrgen/elf.h
@ -22,9 +22,9 @@
 #define ELF_H

 #include <cstdint>
-#include <map>
+#include <vector>
 #include <string>

-std::map<std::string, std::uint32_t> GetCommonSymbols(std::string sourcePath, std::string path);
+std::vector<std::pair<std::string, std::uint32_t>> GetCommonSymbols(std::string sourcePath, std::string path);

 #endif // ELF_H
--- a/tools/ramscrgen/main.cpp
+++ b/tools/ramscrgen/main.cpp
@ -28,54 +28,19 @@
 void HandleCommonInclude(std::string filename, std::string sourcePath, std::string symOrderPath, std::string lang)
 {
    auto commonSymbols = GetCommonSymbols(sourcePath, filename);
-    std::size_t dotIndex;

-    if (filename[0] == '*') {
-        dotIndex = filename.find_last_of(':');
-        filename = filename.substr(dotIndex + 1);
-    }
-
-    dotIndex = filename.find_last_of('.');
-
-    if (dotIndex == std::string::npos)
-        FATAL_ERROR("error: \"%s\" doesn't have a file extension\n", filename.c_str());
-
-    std::string symOrderFilename = filename.substr(0, dotIndex + 1) + "txt";
-
-    SymFile symFile(symOrderPath + "/" + symOrderFilename);
-
-    while (!symFile.IsAtEnd())
+    for (const auto& commonSym : commonSymbols)
    {
-        symFile.HandleLangConditional(lang);
+        unsigned long size = commonSym.second;

-        std::string label = symFile.GetLabel(false);
-
-        if (label.length() == 0)
-        {
-            unsigned long length;
-            if (symFile.ReadInteger(length))
-            {
-                if (length & 3)
-                    symFile.RaiseWarning("gap length %d is not multiple of 4", length);
-                printf(". += 0x%lX;\n", length);
-            }
-        }
-        else
-        {
-            if (commonSymbols.count(label) == 0)
-                symFile.RaiseError("no common symbol named \"%s\"", label.c_str());
-            unsigned long size = commonSymbols[label];
-            int alignment = 4;
-            if (size > 4)
-                alignment = 8;
-            if (size > 8)
-                alignment = 16;
-            printf(". = ALIGN(%d);\n", alignment);
-            printf("%s = .;\n", label.c_str());
-            printf(". += 0x%lX;\n", size);
-        }
-
-        symFile.ExpectEmptyRestOfLine();
+        int alignment = 4;
+        if (size > 4)
+            alignment = 8;
+        if (size > 8)
+            alignment = 16;
+        printf(". = ALIGN(%d);\n", alignment);
+        printf("%s = .;\n", commonSym.first.c_str());
+        printf(". += 0x%lX;\n", size);
    }
 }