From 46418dc2d40364176c1a0bc49e28fc28d0a09d51 Mon Sep 17 00:00:00 2001
From: Aetias <aetias@outlook.com>
Date: Sun, 15 Oct 2023 11:33:07 +0200
Subject: [PATCH] Export ARM9 program footer in LCF

---
 asm/main.s   | 56 ++++++++++++++++++++++------------------------------
 tools/lcf.py |  7 +++++++
 2 files changed, 31 insertions(+), 32 deletions(-)

diff --git a/asm/main.s b/asm/main.s
index b3f99246..019b0ab9 100644
--- a/asm/main.s
+++ b/asm/main.s
@@ -44,11 +44,11 @@ _02000808:
 	ldr r1, _02000924 ; =0x07000000
 	mov r2, #0x400
 	bl func_0200093c
-	ldr r1, _02000928 ; =data_02000b64
+	ldr r1, _02000928 ; =spAutoloadBlockInfosStart
 	ldr r0, [r1, #0x14]
 	bl func_02000950
 	bl func_020009fc
-	ldr r0, _02000928 ; =data_02000b64
+	ldr r0, _02000928 ; =spAutoloadBlockInfosStart
 	ldr r1, [r0, #0xc]
 	ldr r2, [r0, #0x10]
 	mov r3, r1
@@ -86,7 +86,7 @@ _02000918: .word data_027e0000
 _0200091c: .word 0x00000500
 _02000920: .word 0x05000000
 _02000924: .word 0x07000000
-_02000928: .word data_02000b64
+_02000928: .word spAutoloadBlockInfosStart
 _0200092c: .word 0x027fff9c
 _02000930: .word func_01ffa48c
 _02000934: .word func_02000c30
@@ -162,7 +162,7 @@ _020009f8:
 	.global func_020009fc
 	arm_func_start func_020009fc
 func_020009fc: ; 0x020009fc
-	ldr r0, _02000a70 ; =data_02000b64
+	ldr r0, _02000a70 ; =spAutoloadBlockInfosStart
 	ldr r1, [r0]
 	ldr r2, [r0, #4]
 	ldr r3, [r0, #8]
@@ -198,7 +198,7 @@ _02000a6c:
 	b func_02000a74
 	.align 2, 0
 	arm_func_end func_020009fc
-_02000a70: .word data_02000b64
+_02000a70: .word spAutoloadBlockInfosStart
     
     .global func_02000a74
     arm_func_start func_02000a74
@@ -275,33 +275,25 @@ _02000b5c: .word 0x0005707d
 func_02000b60: ; 0x02000b60
 	bx lr
 	arm_func_end func_02000b60
-	.global data_02000b64
-data_02000b64: ; 0x02000b64
-	.byte 0xc0, 0x0f, 0x06, 0x02
-	.global data_02000b68
-data_02000b68: ; 0x02000b68
-	.byte 0xd8, 0x0f, 0x06, 0x02
-	.global data_02000b6c
-data_02000b6c: ; 0x02000b6c
-	.byte 0x20, 0x8e, 0x05, 0x02
-	.global data_02000b70
-data_02000b70: ; 0x02000b70
-	.byte 0x20, 0x8e, 0x05, 0x02
-	.global data_02000b74
-data_02000b74: ; 0x02000b74
-	.byte 0xc0, 0x73, 0x07, 0x02
-	.global data_02000b78
-data_02000b78: ; 0x02000b78
-	.byte 0x64, 0x1a, 0x04, 0x02
-	.global data_02000b7c
-data_02000b7c: ; 0x02000b7c
-	.byte 0x30, 0x75, 0x00, 0x04
-	.global data_02000b80
-data_02000b80: ; 0x02000b80
-	.byte 0x21, 0x06, 0xc0, 0xde
-	.global data_02000b84
-data_02000b84: ; 0x02000b84
-	.byte 0xde, 0xc0, 0x06, 0x21
+
+	.global spAutoloadBlockInfosStart
+spAutoloadBlockInfosStart: ; 0x02000b64
+	.word 0x02060fc0
+spAutoloadBlockInfosEnd: ; 0x02000b68
+	.word 0x02060fd8
+spAutoloadCode: ; 0x02000b6c
+	.word 0x02058e20
+spBssStart: ; 0x02000b70
+	.word 0x02058e20
+spBssEnd: ; 0x02000b74
+	.word 0x020773c0
+sCompressedCodeEnd: ; 0x02000b78
+	.word 0x02041a64
+sSdkVersion: ; 0x02000b7c
+	.word 0x04007530
+	.word 0xdec00621 ; nitrocode
+	.word 0x2106c0de
+
 	.global data_02000b88
 data_02000b88: ; 0x02000b88
 	.ascii "[SDK+NINTENDO:BACKUP]"
diff --git a/tools/lcf.py b/tools/lcf.py
index 45b066b3..8008048c 100644
--- a/tools/lcf.py
+++ b/tools/lcf.py
@@ -224,6 +224,7 @@ with open(f'{BUILD}arm9_linker_script.lcf', 'w') as file:
     file.write('    ITCM      : ORIGIN = 0x1ff8000 >> arm9.bin\n')
     file.write('    DTCM      : ORIGIN = 0x27e0000 >> arm9.bin\n')
     file.write('    AUTOLOADS : ORIGIN = 0         >> arm9.bin\n')
+    file.write('    FOOTER    : ORIGIN = 0         >  arm9_footer.bin\n')
     file.write('\n')
     file.write('    OV_TABLE  : ORIGIN = 0 > arm9_ovt.bin\n')
     file.write('\n')
@@ -272,6 +273,12 @@ with open(f'{BUILD}arm9_linker_script.lcf', 'w') as file:
     file.write('        WRITEW ADDR(DTCM); WRITEW dtcm_size; WRITEW 0xec0;\n')
     file.write('    } > AUTOLOADS\n')
     file.write('\n')
+    file.write('    .footer : {\n')
+    file.write('        WRITEW 0xdec00621;\n')
+    file.write('        WRITEW spAutoloadBlockInfosStart - ADDR(ARM9);\n')
+    file.write('        WRITEW 0;\n')
+    file.write('    } > FOOTER\n')
+    file.write('\n')
     for ov in OVERLAYS:
         file.write(f'    .{ov.name} : ' + '{\n')
         file.write(f'        {ov.name}_start = .;\n')