implement $savechar on Episode 3

This commit is contained in:
Martin Michelsen
2024-06-27 23:33:22 -07:00
parent 52644695a3
commit 4bd6ef12a9
38 changed files with 474 additions and 82 deletions
@@ -1,25 +1,31 @@
stwu [r1 - 0x20], r1
stwu [r1 - 0x40], r1
mflr r0
stw [r1 + 0x24], r0
stw [r1 + 0x44], r0
stw [r1 + 0x08], r31
stw [r1 + 0x0C], r30
stw [r1 + 0x10], r29
stw [r1 + 0x14], r28
stw [r1 + 0x18], r27
b get_data_ptr
get_data_ptr_ret:
mflr r30
li r3, 0x279C
lwz r27, [r30 + 0x18] # sizeof(part2)
addi r3, r27, 0x42C # sizeof(header) + sizeof(part1) + sizeof(part2) + sizeof(unused fields after part2)
lwz r0, [r30]
mtctr r0
bctrl # malloc9
mr. r31, r3
beq malloc9_failed
lis r0, 0x3000
ori r0, r0, 0x9C27
stw [r31], r0 # header = 30 00 9C 27
li r0, 0x3000
sth [r31], r0
addi r3, r27, 0x42C
stb [r31 + 2], r3
rlwinm r3, r3, 24, 24, 31
stb [r31 + 3], r3 # header = 30 00 SS SS
lwz r4, [r30 + 0x04]
lwz r4, [r4] # r4 = char_file_part1
@@ -30,16 +36,18 @@ get_data_ptr_ret:
lwz r4, [r30 + 0x08]
lwz r4, [r4] # r4 = char_file_part2
addi r3, r31, 0x0420
li r5, 0x2370 # sizeof(part2)
mr r5, r27
bl memcpy
li r0, 0
stw [r31 + 0x2790], r0
stw [r31 + 0x2794], r0
stw [r31 + 0x2798], r0
add r3, r27, r31
addi r3, r3, 0x420 # r3 = pointer to unused fields after part2
stw [r3 + 0], r0
stw [r3 + 4], r0
stw [r3 + 8], r0
mr r28, r31
li r29, 0x279C
addi r29, r27, 0x42C
send_again:
lwz r3, [r30 + 0x0C]
lwz r3, [r3]
@@ -74,12 +82,13 @@ drain_failed:
li r3, 0
malloc9_failed:
lwz r27, [r1 + 0x18]
lwz r28, [r1 + 0x14]
lwz r29, [r1 + 0x10]
lwz r30, [r1 + 0x0C]
lwz r31, [r1 + 0x08]
lwz r0, [r1 + 0x24]
addi r1, r1, 0x20
lwz r0, [r1 + 0x44]
addi r1, r1, 0x40
mtlr r0
blr