Sync Makefile and common syms (#676)

2026-04-25 15:28:53 -05:00 · 2024-11-26 12:46:12 -05:00 · 2024-11-26 12:46:12 -05:00 · 2a3e92e10f
commit 2a3e92e10f
parent b76867fc3b
89 changed files with 271 additions and 535 deletions
--- a/108
+++ b/108
@ -150,12 +150,20 @@ 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
@ -237,7 +245,10 @@ 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)
+	@: # Silence the "Nothing to be done for `generated'" message, which some people were confusing for an error.

 %.s:   ;
 %.png: ;
@ -252,8 +263,6 @@ 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)

@ -287,69 +296,52 @@ endif
 # As a side effect, they're evaluated immediately instead of when the rule is invoked.
 # It doesn't look like $(shell) can be deferred so there might not be a better way (Icedude_907: there is soon).

-# For C dependencies.
-# Args: $1 = Output file without extension (build/assets/src/data), $2 = Input file (src/data.c)
-define C_DEP
-$(call C_DEP_IMPL,$1,$2,$1)
-endef
-# Internal implementation details.
-# $1: Output file without extension, $2 input file, $3 temp path (if keeping)
-define C_DEP_IMPL
-$1.o: $2
+$(C_BUILDDIR)/%.o: $(C_SUBDIR)/%.c
 ifneq ($(KEEP_TEMPS),1)
-	@echo "$$(CC1) <flags> -o $$@ $$<"
-	@$$(CPP) $$(CPPFLAGS) $$< | $$(PREPROC) -i $$< charmap.txt | $$(CC1) $$(CFLAGS) -o - - | cat - <(echo -e ".text\n\t.align\t2, 0") | $$(AS) $$(ASFLAGS) -o $$@ -
+	@echo "$(CC1) <flags> -o $@ $<"
+	@$(CPP) $(CPPFLAGS) $< | $(PREPROC) -i $< charmap.txt | $(CC1) $(CFLAGS) -o - - | cat - <(echo -e ".text\n\t.align\t2, 0") | $(AS) $(ASFLAGS) -o $@ -
 else
-	@$$(CPP) $$(CPPFLAGS) $$< -o $3.i
-	@$$(PREPROC) $3.i charmap.txt | $$(CC1) $$(CFLAGS) -o $3.s
-	@echo -e ".text\n\t.align\t2, 0 @ Don't pad with nop\n" >> $3.s
-	$$(AS) $$(ASFLAGS) -o $$@ $3.s
+	@$(CPP) $(CPPFLAGS) $< -o $*.i
+	@$(PREPROC) $*.i charmap.txt | $(CC1) $(CFLAGS) -o $*.s
+	@echo -e ".text\n\t.align\t2, 0\n" >> $*.s
+	$(AS) $(ASFLAGS) -o $@ $*.s
 endif
+
+$(C_BUILDDIR)/%.d: $(C_SUBDIR)/%.c
+	$(SCANINC) -M $@ $(INCLUDE_SCANINC_ARGS) -I tools/agbcc/include $<
+
 ifneq ($(NODEP),1)
-$1.d: $2
-	$(SCANINC) -M $1.d $(INCLUDE_SCANINC_ARGS) -I tools/agbcc/include $2
-include $1.d
-endif
-endef
-
-# Create generic rules if no dependency scanning, else create the real rules
-ifeq ($(NODEP),1)
-$(eval $(call C_DEP,$(C_BUILDDIR)/%,$(C_SUBDIR)/%.c))
-else
-$(foreach src,$(C_SRCS),$(eval $(call C_DEP,$(OBJ_DIR)/$(basename $(src)),$(src))))
+-include $(addprefix $(OBJ_DIR)/,$(C_SRCS:.c=.d))
 endif

-# Similar methodology for Assembly files
-# $1: Output path without extension, $2: Input file (`*.s`)
-define ASM_DEP
-$1.o: $2
-	$$(AS) $$(ASFLAGS) -o $$@ $$<
-$(call ASM_SCANINC,$1,$2)
-endef
-# As above but first doing a preprocessor pass
-define ASM_DEP_PREPROC
-$1.o: $2
-	$$(PREPROC) $$< charmap.txt | $$(CPP) $(INCLUDE_SCANINC_ARGS) - | $$(PREPROC) -ie $$< charmap.txt | $$(AS) $$(ASFLAGS) -o $$@
-$(call ASM_SCANINC,$1,$2)
-endef
+$(ASM_BUILDDIR)/%.o: $(ASM_SUBDIR)/%.s
+	$(AS) $(ASFLAGS) -o $@ $<
+
+$(ASM_BUILDDIR)/%.d: $(ASM_SUBDIR)/%.s
+	$(SCANINC) -M $@ $(INCLUDE_SCANINC_ARGS) -I "" $<

-define ASM_SCANINC
 ifneq ($(NODEP),1)
-$1.d: $2
-	$(SCANINC) -M $1.d $(INCLUDE_SCANINC_ARGS) -I "" $2
-include $1.d
+-include $(addprefix $(OBJ_DIR)/,$(ASM_SRCS:.s=.d))
 endif
-endef

-# Dummy rules or real rules
-ifeq ($(NODEP),1)
-$(eval $(call ASM_DEP,$(ASM_BUILDDIR)/%,$(ASM_SUBDIR)/%.s))
-$(eval $(call ASM_DEP_PREPROC,$(C_BUILDDIR)/%,$(C_SUBDIR)/%.s))
-$(eval $(call ASM_DEP_PREPROC,$(DATA_ASM_BUILDDIR)/%,$(DATA_ASM_SUBDIR)/%.s))
-else
-$(foreach src, $(ASM_SRCS), $(eval $(call ASM_DEP,$(src:%.s=$(OBJ_DIR)/%),$(src))))
-$(foreach src, $(C_ASM_SRCS), $(eval $(call ASM_DEP_PREPROC,$(src:%.s=$(OBJ_DIR)/%),$(src))))
-$(foreach src, $(REGULAR_DATA_ASM_SRCS), $(eval $(call ASM_DEP_PREPROC,$(src:%.s=$(OBJ_DIR)/%),$(src))))
+$(C_BUILDDIR)/%.o: $(C_SUBDIR)/%.s
+	$(PREPROC) $< charmap.txt | $(CPP) $(INCLUDE_SCANINC_ARGS) - | $(PREPROC) -ie $< charmap.txt | $(AS) $(ASFLAGS) -o $@
+
+$(C_BUILDDIR)/%.d: $(C_SUBDIR)/%.s
+	$(SCANINC) -M $@ $(INCLUDE_SCANINC_ARGS) -I "" $<
+
+ifneq ($(NODEP),1)
+-include $(addprefix $(OBJ_DIR)/,$(C_ASM_SRCS:.s=.d))
+endif
+
+$(DATA_ASM_BUILDDIR)/%.o: $(DATA_ASM_SUBDIR)/%.s
+	$(PREPROC) $< charmap.txt | $(CPP) $(INCLUDE_SCANINC_ARGS) - | $(PREPROC) -ie $< charmap.txt | $(AS) $(ASFLAGS) -o $@
+
+$(DATA_ASM_BUILDDIR)/%.d: $(DATA_ASM_SUBDIR)/%.s
+	$(SCANINC) -M $@ $(INCLUDE_SCANINC_ARGS) -I "" $<
+
+ifneq ($(NODEP),1)
+-include $(addprefix $(OBJ_DIR)/,$(REGULAR_DATA_ASM_SRCS:.s=.d))
 endif

 $(OBJ_DIR)/sym_bss.ld: sym_bss.txt
@ -373,8 +365,10 @@ endif
 # Final rules

 # Elf from object files
+LDFLAGS = -Map ../../$(MAP)
 $(ELF): $(LD_SCRIPT) $(LD_SCRIPT_DEPS) $(OBJS)
 	@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$(GAME_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/battle_anim_special.txt
+++ b/common_syms/battle_anim_special.txt
@ -1,3 +0,0 @@
-gMonShrinkDuration
-gMonShrinkDelta
-gMonShrinkDistance
--- a/common_syms/battle_controller_pokedude.txt
+++ b/common_syms/battle_controller_pokedude.txt
@ -1 +0,0 @@
-gPokedudeBattlerStates
--- 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/berry_fix_program.txt
+++ b/common_syms/berry_fix_program.txt
@ -1,4 +0,0 @@
-gMultibootStart
-gMultibootStatus
-gMultibootSize
-gMultibootParam
--- a/common_syms/bg.txt
+++ b/common_syms/bg.txt
@ -1 +0,0 @@
-gWindowTileAutoAllocEnabled
--- a/common_syms/cable_club.txt
+++ b/common_syms/cable_club.txt
@ -1 +0,0 @@
-UnusedVarNeededToMatch
--- a/common_syms/ereader_screen.txt
+++ b/common_syms/ereader_screen.txt
@ -1 +0,0 @@
-gEReaderData
--- a/common_syms/event_data.txt
+++ b/common_syms/event_data.txt
@ -1 +0,0 @@
-gLastQuestLogStoredFlagOrVarIdx
--- a/common_syms/evolution_scene.txt
+++ b/common_syms/evolution_scene.txt
@ -1 +0,0 @@
-gCB2_AfterEvolution
--- a/common_syms/fame_checker.txt
+++ b/common_syms/fame_checker.txt
@ -1,2 +0,0 @@
-gFameChecker_ListMenuTemplate
-gIconDescriptionBoxIsOpen
--- 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 @@
-gFieldInputRecord
--- a/common_syms/field_specials.txt
+++ b/common_syms/field_specials.txt
@ -1,2 +0,0 @@
-sFieldSpecialsListMenuTemplate
-sFieldSpecialsListMenuScrollBuffer
--- a/common_syms/fieldmap.txt
+++ b/common_syms/fieldmap.txt
@ -1 +0,0 @@
-VMap
--- a/common_syms/help_system.txt
+++ b/common_syms/help_system.txt
@ -1,2 +0,0 @@
-gHelpSystemState
-gHelpContextIdBackup
--- a/common_syms/help_system_util.txt
+++ b/common_syms/help_system_util.txt
@ -1 +0,0 @@
-gHelpSystemEnabled
--- 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/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
@ -1,3 +0,0 @@
-gHostRfuGameData
-gRfu
-gHostRfuUsername
--- 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
-gMPlayJumpTable
-gCgbChans
-gPokemonCryTracks
-gPokemonCrySong
-gMPlayInfo_BGM
-gMPlayInfo_SE1
-gMPlayInfo_SE2
-gMPlayMemAccArea
-gMPlayInfo_SE3
--- a/common_syms/main.txt
+++ b/common_syms/main.txt
@ -1,12 +0,0 @@
-gKeyRepeatStartDelay
-gLinkTransferringData
-gMain
-gKeyRepeatContinueDelay
-gSoftResetDisabled
-gIntrTable
-sVcountAfterSound
-gLinkVSyncDisabled
-IntrMain_Buffer
-sVcountAtIntr
-sVcountBeforeSound
-gPcmDmaCounter
--- a/common_syms/overworld.txt
+++ b/common_syms/overworld.txt
@ -1,8 +0,0 @@
-gBGTilemapBuffers1
-gBGTilemapBuffers2
-gBGTilemapBuffers3
-gFieldCallback
-gFieldCallback2
-gHeldKeyCodeToSend
-gLocalLinkPlayerId
-gFieldLinkPlayerCount
--- a/common_syms/party_menu.txt
+++ b/common_syms/party_menu.txt
@ -1 +0,0 @@
-gItemUseCB
--- a/common_syms/quest_log.txt
+++ b/common_syms/quest_log.txt
@ -1,4 +0,0 @@
-gQuestLogPlaybackState
-sMaxActionsInScene
-gQuestLogFieldInput
-sCurSceneActions
--- a/common_syms/random.txt
+++ b/common_syms/random.txt
@ -1 +0,0 @@
-gRngValue
--- a/common_syms/save.txt
+++ b/common_syms/save.txt
@ -1,12 +0,0 @@
-gLastWrittenSector
-gLastSaveCounter
-gLastKnownGoodSector
-gDamagedSaveSectors
-gSaveCounter
-gSaveDataBufferPtr
-gIncrementalSectorId
-gSaveUnusedVar
-gSaveFileStatus
-gGameContinueCallback
-gRamSaveSectorLocations
-gSaveAttemptStatus
--- a/common_syms/save_failed_screen.txt
+++ b/common_syms/save_failed_screen.txt
@ -1 +0,0 @@
-sIsInSaveFailedScreen
--- a/common_syms/scrcmd.txt
+++ b/common_syms/scrcmd.txt
@ -1,2 +0,0 @@
-sQuestLogScriptContextPtr
-gSelectedObjectEvent
--- 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/task.txt
+++ b/common_syms/task.txt
@ -1 +0,0 @@
-gTasks
--- a/common_syms/text.txt
+++ b/common_syms/text.txt
@ -1 +0,0 @@
-gTextFlags
--- a/common_syms/text_printer.txt
+++ b/common_syms/text_printer.txt
@ -1,2 +0,0 @@
-gFonts
-gGlyphInfo
--- a/common_syms/window.txt
+++ b/common_syms/window.txt
@ -1,2 +0,0 @@
-gWindowClearTile
-gWindowBgTilemapBuffers
--- a/include/gba/defines.h
+++ b/include/gba/defines.h
@ -13,6 +13,7 @@
 #define IWRAM_DATA __attribute__((section("iwram_data")))
 #define EWRAM_DATA __attribute__((section("ewram_data")))
 #endif
+#define COMMON_DATA __attribute__((section("common_data")))

 #if MODERN
 #define NOINLINE __attribute__((noinline))
--- a/ld_script.ld
+++ b/ld_script.ld
@ -38,6 +38,7 @@ SECTIONS {

        /* COMMON starts at 0x30030E0 */
        INCLUDE "sym_common.ld"
+        src/*.o(COMMON);

        *libc.a:sbrkr.o(COMMON);
        end = .;
--- a/ld_script_modern.ld
+++ b/ld_script_modern.ld
@ -30,6 +30,7 @@ SECTIONS {

        /* COMMON starts at 0x30022A8 */
        *(COMMON);
+        *(common_data);
        end = .;
        __end__ = .;
    } > IWRAM
--- 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, void *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, void *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) = NULL;
+COMMON_DATA const u16 *gFlashMaxTime = NULL;

 void SetReadFlash1(u16 *dest);

--- a/src/battle_anim_special.c
+++ b/src/battle_anim_special.c
@ -30,9 +30,9 @@
 #define TAG_PARTICLES_LUXURYBALL  55030
 #define TAG_PARTICLES_PREMIERBALL 55031

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

 static void AnimTask_UnusedLevelUpHealthBox_Step(u8);
 static void AnimTask_FlashHealthboxOnLevelUp_Step(u8);
--- a/src/battle_controller_pokedude.c
+++ b/src/battle_controller_pokedude.c
@ -2424,7 +2424,7 @@ static const struct PokedudeBattlePartyInfo *const sPokedudeBattlePartyPointers[
    [TTVSCR_CATCHING] = sParties_Catching,
 };

-struct PokedudeBattlerState *gPokedudeBattlerStates[MAX_BATTLERS_COUNT];
+COMMON_DATA struct PokedudeBattlerState *gPokedudeBattlerStates[MAX_BATTLERS_COUNT] = {0};

 static void PokedudeSimulateInputChooseAction(void)
 {
--- a/src/battle_main.c
+++ b/src/battle_main.c
@ -220,15 +220,15 @@ 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];
+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};

 static const struct ScanlineEffectParams sIntroScanlineParams16Bit =
 {
--- a/src/berry_fix_program.c
+++ b/src/berry_fix_program.c
@ -32,10 +32,10 @@ enum {
    STATE_RETRY,
 };

-const void *gMultibootStart;
-int gMultibootStatus;
-size_t gMultibootSize;
-struct MultiBootParam gMultibootParam;
+COMMON_DATA const void *gMultibootStart = NULL;
+COMMON_DATA int gMultibootStatus = 0;
+COMMON_DATA size_t gMultibootSize = 0;
+COMMON_DATA struct MultiBootParam gMultibootParam = {0};

 static void CB2_BerryFix(void);
 static void Task_BerryFixMain(u8 taskId);
--- a/src/bg.c
+++ b/src/bg.c
@ -43,7 +43,7 @@ static struct BgConfig2 sGpuBgConfigs2[4];
 static u32 sDmaBusyBitfield[4];
 static u8 gpu_tile_allocation_map_bg[0x100];

-bool32 gWindowTileAutoAllocEnabled;
+COMMON_DATA bool32 gWindowTileAutoAllocEnabled = 0;

 static const struct BgConfig sZeroedBgControlStruct = { 0 };

--- a/src/cable_club.c
+++ b/src/cable_club.c
@ -27,7 +27,7 @@
 #include "constants/field_weather.h"
 #include "constants/maps.h"

-u32 UnusedVarNeededToMatch[8];
+COMMON_DATA u32 UnusedVarNeededToMatch[8] = {0};

 static void Task_LinkupStart(u8 taskId);
 static void Task_LinkupAwaitConnection(u8 taskId);
--- a/src/ereader_screen.c
+++ b/src/ereader_screen.c
@ -41,7 +41,7 @@ struct EReaderData

 static void Task_EReader(u8);

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

 extern const u8 gMultiBootProgram_EReader_Start[];
 extern const u8 gMultiBootProgram_EReader_End[];
--- a/src/event_data.c
+++ b/src/event_data.c
@ -35,7 +35,7 @@ EWRAM_DATA u16 gSpecialVar_PrevTextColor = 0;
 EWRAM_DATA u16 gSpecialVar_0x8014 = 0;
 EWRAM_DATA u8 sSpecialFlags[SPECIAL_FLAGS_SIZE] = {};

-u16 gLastQuestLogStoredFlagOrVarIdx;
+COMMON_DATA u16 gLastQuestLogStoredFlagOrVarIdx = 0;

 extern u16 *const gSpecialVars[];

--- a/src/evolution_scene.c
+++ b/src/evolution_scene.c
@ -43,7 +43,7 @@ static EWRAM_DATA struct EvoInfo *sEvoStructPtr = NULL;
 static EWRAM_DATA u16 *sBgAnimPal = NULL;

 // IWRAM common
-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/fame_checker.c
+++ b/src/fame_checker.c
@ -57,8 +57,8 @@ static EWRAM_DATA struct FameCheckerData * sFameCheckerData = NULL;
 static EWRAM_DATA struct ListMenuItem * sListMenuItems = NULL;
 static EWRAM_DATA s32 sLastMenuIdx = 0;

-struct ListMenuTemplate gFameChecker_ListMenuTemplate;
-u8 gIconDescriptionBoxIsOpen;
+COMMON_DATA struct ListMenuTemplate gFameChecker_ListMenuTemplate = {0};
+COMMON_DATA u8 gIconDescriptionBoxIsOpen = 0;

 static void MainCB2_LoadFameChecker(void);
 static void LoadUISpriteSheetsAndPalettes(void);
--- a/src/field_camera.c
+++ b/src/field_camera.c
@ -37,9 +37,9 @@ static s16 sVerticalCameraPan;
 static u8 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;

 // text
 static void move_tilemap_camera_to_upper_left_corner_(struct FieldCameraOffset *cameraOffset)
--- a/src/field_control_avatar.c
+++ b/src/field_control_avatar.c
@ -71,7 +71,7 @@ static bool8 TryDoorWarp(struct MapPosition * position, u16 metatileBehavior, u8
 static s8 GetWarpEventAtPosition(struct MapHeader * mapHeader, u16 x, u16 y, u8 z);
 static const u8 *GetCoordEventScriptAtPosition(struct MapHeader * mapHeader, u16 x, u16 y, u8 z);

-struct FieldInput gFieldInputRecord;
+COMMON_DATA struct FieldInput gFieldInputRecord = {0};

 void FieldClearPlayerInput(struct FieldInput *input)
 {
--- a/src/field_specials.c
+++ b/src/field_specials.c
@ -50,8 +50,8 @@ static EWRAM_DATA u16 sListMenuLastScrollPosition = 0;
 static EWRAM_DATA u8 sPCBoxToSendMon = 0;
 static EWRAM_DATA u8 sBrailleTextCursorSpriteID = 0;

-struct ListMenuTemplate sFieldSpecialsListMenuTemplate;
-u16 sFieldSpecialsListMenuScrollBuffer;
+COMMON_DATA struct ListMenuTemplate sFieldSpecialsListMenuTemplate = {0};
+COMMON_DATA u16 sFieldSpecialsListMenuScrollBuffer = 0;

 static void Task_AnimatePcTurnOn(u8 taskId);
 static void PcTurnOnUpdateMetatileId(bool16 flag);
--- a/src/fieldmap.c
+++ b/src/fieldmap.c
@ -14,7 +14,7 @@ struct ConnectionFlags
    u8 east:1;
 };

-struct BackupMapLayout VMap;
+COMMON_DATA struct BackupMapLayout VMap = {0};
 EWRAM_DATA u16 gBackupMapData[VIRTUAL_MAP_SIZE] = {};
 EWRAM_DATA struct MapHeader gMapHeader = {};
 EWRAM_DATA struct Camera gCamera = {};
--- a/src/help_system.c
+++ b/src/help_system.c
@ -51,8 +51,8 @@ struct HelpSystemState
    u8 scrollSub;
 };

-struct HelpSystemState gHelpSystemState;
-u16 gHelpContextIdBackup;
+COMMON_DATA struct HelpSystemState gHelpSystemState = {0};
+COMMON_DATA u16 gHelpContextIdBackup = 0;

 static bool32 IsCurrentMapInArray(const u16 * mapIdxs);
 static void BuildMainTopicsListAndMoveToH00(struct HelpSystemListMenu * a0, struct ListMenuItem * a1);
--- a/src/help_system_util.c
+++ b/src/help_system_util.c
@ -10,7 +10,7 @@

 #define ZERO 0

-bool8 gHelpSystemEnabled;
+COMMON_DATA bool8 gHelpSystemEnabled = 0;

 struct HelpSystemVideoState
 {
--- a/src/image_processing_effects.c
+++ b/src/image_processing_effects.c
@ -2,16 +2,16 @@
 #include "image_processing_effects.h"

 // IWRAM common
-u8 gCanvasColumnStart;
-u16 (*gCanvasPixels)[][32];
-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)[][32] = {0};
+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/librfu_rfu.c
+++ b/src/librfu_rfu.c
@ -68,11 +68,11 @@ static void rfu_STC_NI_receive_Sender(u8, u8, const struct RfuLocalStruct *, con
 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
@ -62,41 +62,41 @@ 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 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;
-u8 gSuppressLinkErrorMessage;
-u8 gWirelessCommType;
-u8 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; // file
-u32 gLinkFiller4; // boundary
-u32 gLinkFiller5; // here?
-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 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;
+COMMON_DATA u8 gSuppressLinkErrorMessage = 0;
+COMMON_DATA u8 gWirelessCommType = 0;
+COMMON_DATA u8 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; // file
+COMMON_DATA u32 gLinkFiller4 = 0; // boundary
+COMMON_DATA u32 gLinkFiller5 = 0; // here?
+COMMON_DATA u8 gLastSendQueueCount = 0;
+COMMON_DATA struct Link gLink = {0};
+COMMON_DATA u8 gLastRecvQueueCount = 0;
+COMMON_DATA u16 gLinkSavedIme = 0;

 static EWRAM_DATA bool8 sLinkTestDebugValuesEnabled = FALSE;
 static EWRAM_DATA bool8 sDummyFlag = FALSE;
--- a/src/link_rfu_2.c
+++ b/src/link_rfu_2.c
@ -75,9 +75,9 @@ static u32 sRfuAPIBuffer[RFU_API_BUFF_SIZE_RAM / 4];
 static u8 sResendBlock8[CMD_LENGTH * 2];
 static u16 sResendBlock16[CMD_LENGTH];

-struct RfuGameData gHostRfuGameData;
-struct RfuManager gRfu;
-u8 gHostRfuUsername[PLAYER_NAME_LENGTH + 1];
+COMMON_DATA struct RfuGameData gHostRfuGameData = {0};
+COMMON_DATA struct RfuManager gRfu = {0};
+COMMON_DATA u8 gHostRfuUsername[PLAYER_NAME_LENGTH + 1] = {0};

 static void InitChildRecvBuffers(void);
 static void InitParentSendData(void);
--- a/src/list_menu.c
+++ b/src/list_menu.c
@ -39,8 +39,8 @@ struct MoveMenuInfoIcon

 static EWRAM_DATA struct MysteryGiftLinkMenuStruct sMysteryGiftLinkMenu = {0};

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

 static u8 ListMenuInitInternal(const struct ListMenuTemplate *listMenuTemplate, u16 cursorPos, u16 itemsAbove);
 static bool8 ListMenuChangeSelection(struct ListMenu *list, bool8 updateCursorAndCallCallback, u8 count, bool8 movingDown);
--- 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;

 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 MPlayFunc gMPlayJumpTable[36] = {0};
+COMMON_DATA struct CgbChannel gCgbChans[4] = {0};
+COMMON_DATA struct MusicPlayerTrack gPokemonCryTracks[MAX_POKEMON_CRIES * 2] = {0};
+COMMON_DATA struct PokemonCrySong gPokemonCrySong = {0};
+COMMON_DATA struct MusicPlayerInfo gMPlayInfo_BGM = {0};
+COMMON_DATA struct MusicPlayerInfo gMPlayInfo_SE1 = {0};
+COMMON_DATA struct MusicPlayerInfo gMPlayInfo_SE2 = {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
@ -58,21 +58,18 @@ const IntrFunc gIntrTableTemplate[] =

 #define INTR_COUNT ((int)(sizeof(gIntrTableTemplate)/sizeof(IntrFunc)))

-u16 gKeyRepeatStartDelay;
-u8 gLinkTransferringData;
-struct Main gMain;
-u16 gKeyRepeatContinueDelay;
-u8 gSoftResetDisabled;
-IntrFunc gIntrTable[INTR_COUNT];
-bool8 gLinkVSyncDisabled;
-u32 IntrMain_Buffer[0x200];
-u8 gPcmDmaCounter;
-
-// These variables are not defined in RS or Emerald, and are never read.
-// They were likely used to debug the audio engine and VCount interrupt.
-u8 sVcountAfterSound;
-u8 sVcountAtIntr;
-u8 sVcountBeforeSound;
+COMMON_DATA u16 gKeyRepeatStartDelay = 0;
+COMMON_DATA u8 gLinkTransferringData = 0;
+COMMON_DATA struct Main gMain = {0};
+COMMON_DATA u16 gKeyRepeatContinueDelay = 0;
+COMMON_DATA u8 gSoftResetDisabled = 0;
+COMMON_DATA IntrFunc gIntrTable[INTR_COUNT] = {0};
+COMMON_DATA u8 sVcountAfterSound = 0;
+COMMON_DATA bool8 gLinkVSyncDisabled = 0;
+COMMON_DATA u32 IntrMain_Buffer[0x200] = {0};
+COMMON_DATA u8 sVcountAtIntr = 0;
+COMMON_DATA u8 sVcountBeforeSound = 0;
+COMMON_DATA u8 gPcmDmaCounter = 0;

 static IntrFunc * const sTimerIntrFunc = gIntrTable + 0x7;

--- a/src/overworld.c
+++ b/src/overworld.c
@ -106,14 +106,14 @@ static EWRAM_DATA s16 sCreditsOverworld_CmdIndex = 0;

 EWRAM_DATA struct LinkPlayerObjectEvent gLinkPlayerObjectEvents[4] = {};

-u16 *gBGTilemapBuffers1;
-u16 *gBGTilemapBuffers2;
-u16 *gBGTilemapBuffers3;
-void (*gFieldCallback)(void);
-bool8 (*gFieldCallback2)(void);
-u16 gHeldKeyCodeToSend;
-u8 gLocalLinkPlayerId;
-u8 gFieldLinkPlayerCount;
+COMMON_DATA u16 *gBGTilemapBuffers1 = NULL;
+COMMON_DATA u16 *gBGTilemapBuffers2 = NULL;
+COMMON_DATA u16 *gBGTilemapBuffers3 = NULL;
+COMMON_DATA void (*gFieldCallback)(void) = NULL;
+COMMON_DATA bool8 (*gFieldCallback2)(void) = NULL;
+COMMON_DATA u16 gHeldKeyCodeToSend = 0;
+COMMON_DATA u8 gLocalLinkPlayerId = 0;
+COMMON_DATA u8 gFieldLinkPlayerCount = 0;

 static u8 sPlayerLinkStates[MAX_LINK_PLAYERS];
 static KeyInterCB sPlayerKeyInterceptCallback;
--- a/src/party_menu.c
+++ b/src/party_menu.c
@ -414,7 +414,7 @@ EWRAM_DATA u8 gSelectedOrderFromParty[3] = {0};
 static EWRAM_DATA u16 sPartyMenuItemId = ITEM_NONE;
 ALIGNED(4) 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

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

 #include "data/pokemon/tutor_learnsets.h"
 #include "data/party_menu.h"
--- a/src/quest_log.c
+++ b/src/quest_log.c
@ -67,10 +67,10 @@ struct FlagOrVarRecord
    u16 value;
 };

-u8 gQuestLogPlaybackState;
-u16 sMaxActionsInScene;
-struct FieldInput gQuestLogFieldInput;
-struct QuestLogAction * sCurSceneActions;
+COMMON_DATA u8 gQuestLogPlaybackState = 0;
+COMMON_DATA u16 sMaxActionsInScene = 0;
+COMMON_DATA struct FieldInput gQuestLogFieldInput = {0};
+COMMON_DATA struct QuestLogAction * sCurSceneActions = NULL;

 static struct FlagOrVarRecord * sFlagOrVarRecords;
 static u16 sNumFlagsOrVars;
--- a/src/random.c
+++ b/src/random.c
@ -4,7 +4,7 @@
 // The number 1103515245 comes from the example implementation
 // of rand and srand in the ISO C standard.

-u32 gRngValue;
+COMMON_DATA u32 gRngValue = 0;

 u16 Random(void)
 {
--- a/src/save.c
+++ b/src/save.c
@ -77,18 +77,18 @@ STATIC_ASSERT(sizeof(struct SaveBlock1) <= SECTOR_DATA_SIZE * (SECTOR_ID_SAVEBLO
 STATIC_ASSERT(sizeof(struct PokemonStorage) <= SECTOR_DATA_SIZE * (SECTOR_ID_PKMN_STORAGE_END - SECTOR_ID_PKMN_STORAGE_START + 1), PokemonStorageFreeSpace);

 // Sector num to begin writing save data. Sectors are rotated each time the game is saved. (possibly to avoid wear on flash memory?)
-u16 gLastWrittenSector;
-u32 gLastSaveCounter;
-u16 gLastKnownGoodSector;
-u32 gDamagedSaveSectors;
-u32 gSaveCounter;
-struct SaveSector *gSaveDataBufferPtr; // the pointer is in fast IWRAM but points to the slower EWRAM.
-u16 gIncrementalSectorId;
-u16 gSaveUnusedVar;
-u16 gSaveFileStatus;
-void (*gGameContinueCallback)(void);
-struct SaveSectorLocation gRamSaveSectorLocations[NUM_SECTORS_PER_SLOT];
-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 *gSaveDataBufferPtr = NULL; // the pointer is in fast IWRAM but points to the slower EWRAM.
+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 gSaveAttemptStatus = 0;

 EWRAM_DATA struct SaveSector gSaveDataBuffer = {0};
 EWRAM_DATA u32 gSaveUnusedVar2 = 0;
--- a/src/save_failed_screen.c
+++ b/src/save_failed_screen.c
@ -7,7 +7,7 @@
 #include "save.h"
 #include "strings.h"

-bool32 sIsInSaveFailedScreen;
+COMMON_DATA bool32 sIsInSaveFailedScreen = 0;

 static EWRAM_DATA u16 sSaveType = SAVE_NORMAL;
 static EWRAM_DATA u16 sUnused = 0;
--- a/src/scrcmd.c
+++ b/src/scrcmd.c
@ -54,8 +54,8 @@ static EWRAM_DATA u16 sMovingNpcMapGroup = 0;
 static EWRAM_DATA u16 sMovingNpcMapNum = 0;
 static EWRAM_DATA u16 sFieldEffectScriptId = 0;

-struct ScriptContext * sQuestLogScriptContextPtr;
-u8 gSelectedObjectEvent;
+COMMON_DATA struct ScriptContext * sQuestLogScriptContextPtr = NULL;
+COMMON_DATA u8 gSelectedObjectEvent = 0;

 // This is defined in here so the optimizer can't see its value when compiling
 // script.c.
--- a/src/sound.c
+++ b/src/sound.c
@ -30,7 +30,7 @@ static u8 sMapMusicFadeInSpeed;
 static u16 sFanfareCounter;

 // iwram common
-bool8 gDisableMusic;
+COMMON_DATA bool8 gDisableMusic = 0;

 extern u32 gBattleTypeFlags;
 extern struct MusicPlayerInfo gMPlayInfo_BGM;
--- a/src/sprite.c
+++ b/src/sprite.c
@ -270,8 +270,8 @@ static u16 sSpriteTileRanges[MAX_SPRITES * 2];
 static struct AffineAnimState sAffineAnimStates[OAM_MATRIX_COUNT];
 static u16 sSpritePaletteTags[16];

-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 u16 gSpritePriorities[MAX_SPRITES] = {0};
--- a/src/task.c
+++ b/src/task.c
@ -4,7 +4,7 @@
 #define HEAD_SENTINEL 0xFE
 #define TAIL_SENTINEL 0xFF

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

 static void InsertTask(u8 newTaskId);
 static u8 FindFirstActiveTask();
--- a/src/text.c
+++ b/src/text.c
@ -24,7 +24,7 @@ static s32 GetGlyphWidth_Male(u16 glyphId, bool32 isJapanese);
 static s32 GetGlyphWidth_Female(u16 glyphId, bool32 isJapanese);
 static void SpriteCB_TextCursor(struct Sprite *sprite);

-TextFlags gTextFlags;
+COMMON_DATA TextFlags gTextFlags = {0};

 static const u8 sDownArrowTiles[]         = INCBIN_U8("graphics/fonts/down_arrow.4bpp");
 static const u8 sDarkDownArrowTiles[]     = INCBIN_U8("graphics/fonts/down_arrow_RS.4bpp");
--- a/src/text_printer.c
+++ b/src/text_printer.c
@ -10,8 +10,8 @@ static u16 sLastTextBgColor;
 static u16 sLastTextFgColor;
 static u16 sLastTextShadowColor;

-const struct FontInfo *gFonts;
-struct GlyphInfo gGlyphInfo;
+COMMON_DATA const struct FontInfo *gFonts = NULL;
+COMMON_DATA struct GlyphInfo gGlyphInfo = {0};

 static const u8 sFontHalfRowOffsets[] =
 {
--- a/src/window.c
+++ b/src/window.c
@ -1,8 +1,8 @@
 #include "global.h"
 #include "gflib.h"

-u8 gWindowClearTile;
-void *gWindowBgTilemapBuffers[4];
+COMMON_DATA u8 gWindowClearTile = {0};
+COMMON_DATA void *gWindowBgTilemapBuffers[4] = {0};

 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);
    }
 }