mirror of
https://github.com/notwa/mm
synced 2024-06-28 21:07:12 -07:00
104 lines
2.0 KiB
NASM
104 lines
2.0 KiB
NASM
// translates calls to 800021F8
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// to copy strings to memory instead
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// for Lua to later pick up on
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// reset buffer position in our per-frame hook
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la t0, buffer
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sw t0, buffer_pos
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// and set the string to null
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sb r0, 0(t0)
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jr
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nop
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[ObjectSpawn]: 0x80097C00
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[ObjectIndex]: 0x8009812C
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ObjectSpawnWrap:
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// keep track of which objects we're spawning
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// TODO: reset count on scene change
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push 4, ra, 1
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// stuff for jump-only hook
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//li a0, 0x802237C4
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//mov a1, a3
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//beqi a1, 2, + // don't bother loading gameplay_field_keep
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lwu t0, spawn_count
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sll t2, t0, 1
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la t1, spawned
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addu t1, t1, t2
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addiu t0, t0, 1
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sw t0, spawn_count
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sh a1, 0(t1)
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jal @ObjectSpawn
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nop
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+:
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jpop 4, ra, 1
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spawn_count:
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.word 0
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spawned:
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.halfword 0, 0, 0, 0, 0, 0, 0, 0
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// keep track of where we are in the buffer
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buffer_pos:
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.word 0
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// we'll just let this overflow
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.align 8
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buffer:
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.word 0
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// overwrite (not hook) the debug printing function
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.org 0x800021B0
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// a0: unknown
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// a1: char *msg
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// a2: size_t len
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lw t0, buffer_pos
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copy_loop:
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lb t1, 0(a1)
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sb t1, 0(t0)
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addi t0, t0, 1
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addi a1, a1, 1
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subi a2, a2, 1
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bne a2, r0, copy_loop
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sb r0, 0(t0) // null terminate
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sw t0, buffer_pos
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jr
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nop
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// force objects to load
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/* jump-only hook
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.org 0x80098180
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j ObjectSpawnWrap
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nop
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*/
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.org @ObjectIndex
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// we have space for 22 instructions
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push 4, ra, 1
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//sll a1, a1, 0x10
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//sra a1, a1, 0x10
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mov t0, a0
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lbu t1, 8(a0) // remaining items
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cl v0
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-:
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lh t2, 12(t0) // item's object number
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// t2 = abs(t2)
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bgez t2, +
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nop
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subu t2, r0, t2
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+:
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beq a1, t2, +
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subi t1, t1, 1
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addiu v0, v0, 1
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addi t0, t0, 68
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bnez t1, -
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nop
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jal ObjectSpawnWrap
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nop
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//subiu v0, r0, -1
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+:
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jpop 4, ra, 1
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// 19 words
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