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https://github.com/notwa/mm
synced 2025-02-05 05:23:22 -08:00
add OoT spawning
the two asms will be partly merged once i have that ability
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3 changed files with 178 additions and 27 deletions
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@ -3,37 +3,23 @@ require "boilerplate"
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require "addrs.init"
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local assemble = require "inject.lips"
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function inject(fn)
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local asm_dir = bizstring and 'inject/' or './mm/Lua/inject/'
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local asm_path = asm_dir..fn
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local injection_points = {
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['M US10'] = {
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inject_addr = 0x780000,
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inject_maxlen = 0x5A800,
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ow_addr = 0x1749D0,
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ow_before = 0x0C05CEC6,
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},
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['O US10'] = {
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inject_addr = 0x3BC000,
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inject_maxlen = 0x1E800,
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ow_addr = 0x0A19C8,
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ow_before = 0x0C0283EE,
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},
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}
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local inject_addr -- seemingly unused region of memory
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local inject_maxlen -- how much room we have to work with
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local ow_addr -- the jal instruction to overwrite with our hook
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local ow_before -- what its value is normally supposed to be
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if version == 'M US10' then
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inject_addr = 0x780000
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inject_maxlen = 0x5A800
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ow_addr = 0x1749D0
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ow_before = 0x0C05CEC6
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else
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print("Sorry, inject.lua is unimplemented for your game version.")
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return
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end
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-- encode our jal instruction
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local ow_after = 0x0C000000 + math.floor(inject_addr/4)
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if R4(ow_addr) ~= ow_before and R4(ow_addr) ~= ow_after then
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print("Can't inject -- game code is different!")
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return
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end
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-- decode the original address
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local ow_before_addr = (ow_before % 0x4000000)*4
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-- set up a header to handle calling our function and the original
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local header = ("[overwritten]: 0x%08X\n"):format(ow_before_addr)
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header = header..[[
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local header = [[
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[overwritten]: 0x%08X
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// TODO: optimize for size
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// TODO: fix case where overwritten function takes 5+ args
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push ra
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@ -47,6 +33,40 @@ function inject(fn)
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start:
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]]
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injection_points['O JP10'] = injection_points['O US10']
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function inject(fn)
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local asm_dir = bizstring and 'inject/' or './mm/Lua/inject/'
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local asm_path = asm_dir..fn
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local point = injection_points[version]
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if point == nil then
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print("Sorry, inject.lua is unimplemented for your game version.")
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return
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end
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-- seemingly unused region of memory
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local inject_addr = point.inject_addr
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-- how much room we have to work with
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local inject_maxlen = point.inject_maxlen
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-- the jal instruction to overwrite with our hook
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local ow_addr = point.ow_addr
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-- what its value is normally supposed to be
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local ow_before = point.ow_before
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-- encode our jal instruction
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local ow_after = 0x0C000000 + math.floor(inject_addr/4)
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if R4(ow_addr) ~= ow_before and R4(ow_addr) ~= ow_after then
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print("Can't inject -- game code is different!")
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return
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end
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-- decode the original address
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local ow_before_addr = (ow_before % 0x4000000)*4
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-- set up a header to handle calling our function and the original
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local header = header:format(ow_before_addr)
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local inject_words = {}
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local length = 0
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local function add_word(line)
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@ -84,4 +104,8 @@ function inject(fn)
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end
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end
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if oot then
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inject('spawn oot.asm')
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else
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inject('spawn.asm')
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end
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127
Lua/inject/spawn oot.asm
Normal file
127
Lua/inject/spawn oot.asm
Normal file
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@ -0,0 +1,127 @@
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[actor_spawn]: 0x80025110
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[max_actor_no]: 0x1D6
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[global_context]: 0x801C84A0
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[buttons_offset]: 0x14
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[actor_spawn_offset]: 0x1C24
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[link_actor]: 0x801DAA30
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[actor_x]: 0x24
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[actor_y]: 0x28
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[actor_z]: 0x2C
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[actor_horiz_angle]: 0x46
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[link_save]: 0x8011A5D0
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[rupees_offset]: 0x34
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[upgrades_offset]: 0xA0
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[upgrades_2_offset]: 0xA2
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[button_L]: 0x0020
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[button_D_right]: 0x0100
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[button_D_left]: 0x0200
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[button_D_down]: 0x0400
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[button_D_up]: 0x0800
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[button_any]: 0x0F20
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[hold_delay_amount]: 3
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push 4, s1, ra
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li t0, @link_save
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li t1, @global_context
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// give max rupee upgrade (set bit 13, clear bit 12 of lower halfword)
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lh t2, @upgrades_2_offset(t0)
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ori t2, t2, 0x2000
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andi t2, t2, 0xEFFF
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sh t2, @upgrades_2_offset(t0)
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//
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lhu t2, @buttons_offset(t1)
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lh t9, @rupees_offset(t0)
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lw s1, hold_delay
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andi t4, t2, @button_any
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bne t4, r0, no_reset
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addi s1, s1, 1
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li s1, 0
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no_reset:
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subi t4, s1, 1
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beq t4, r0, first_time
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nop
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subi t4, s1, @hold_delay_amount
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bltz t4, return
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nop
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first_time:
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andi t3, t2, @button_D_up
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beq t3, r0, no_D_up
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nop
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addi t9, t9, 1
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no_D_up:
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andi t3, t2, @button_D_down
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beq t3, r0, no_D_down
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nop
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subi t9, t9, 1
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no_D_down:
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andi t3, t2, @button_D_right
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beq t3, r0, no_D_right
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nop
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addi t9, t9, 10
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no_D_right:
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andi t3, t2, @button_D_left
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beq t3, r0, no_D_left
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nop
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subi t9, t9, 10
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no_D_left:
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subi t4, t9, 1
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bgez t4, no_min
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nop
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li t9, @max_actor_no
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no_min:
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subi t4, t9, @max_actor_no
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blez t4, no_max
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nop
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li t9, 1
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no_max:
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sh t9, @rupees_offset(t0)
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andi t3, t2, @button_L
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beq t3, r0, return
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nop
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mov a0, t9
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bal simple_spawn
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nop
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return:
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sw s1, hold_delay
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jpop 4, s1, ra
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simple_spawn: // args: a0 (actor to spawn)
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push 4, 9, ra
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mov a2, a0
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li a1, @global_context
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addi a0, a1, @actor_spawn_offset
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li t0, @link_actor
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lw t1, @actor_x(t0)
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lw t2, @actor_y(t0)
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lw t3, @actor_z(t0)
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mov a3, t1 // X position
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sw t2, 0x10(sp) // Y position
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sw t3, 0x14(sp) // Z position
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li t9, 0x0
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sw t9, 0x18(sp) // rotation?
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lh t7, @actor_horiz_angle(t0)
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sw t7, 0x1C(sp) // horizontal rotation
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li t9, 0x0
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sw t9, 0x20(sp) // rotation?
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lh t7, @actor_horiz_angle(t0)
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sw t7, 0x24(sp) // actor variable
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li t9, 0x0000007F
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sw t9, 0x28(sp) // unknown
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li t9, 0x000003FF
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sw t9, 0x2C(sp) // unknown
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li t9, 0x00000000
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sw t9, 0x30(sp) // unknown
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jal @actor_spawn
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nop
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jpop 4, 9, ra
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hold_delay:
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.word 0
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@ -105,8 +105,8 @@ simple_spawn: // args: a0 (actor to spawn)
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li t9, 0x0
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sw t9, 0x18(sp) // rotation?
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li t9, 0x5080
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sw t9, 0x1C(sp) // horizontal rotation
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lh t7, @actor_horiz_angle(t0)
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sw t7, 0x1C(sp) // horizontal rotation
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li t9, 0x0
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sw t9, 0x20(sp) // rotation?
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