mirror of
https://github.com/notwa/mm
synced 2024-06-28 21:07:12 -07:00
192 lines
3.8 KiB
NASM
192 lines
3.8 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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[global_context]: 0x80212020
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// offset from first pointer in global context
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[dlist_offset]: 0x2C0
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[SetTextRGBA]: 0x800FB3AC
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[SetTextXY]: 0x800FB41C
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[SetTextString]: 0x800FBCB4
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[TxtPrinter]: 0x800FBB60
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[InitTxtStruct]: 0x800FBB8C
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[DoTxtStruct]: 0x800FBC1C
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[UpdateTxtStruct]: 0x800FBC64
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[ObjectSpawn]: 0x80097C00
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[ObjectIndex]: 0x8009812C
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push 4, 1, ra
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// draw some nonsense text
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li a0, 0x00010001 // xy
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li a1, 0x88CCFFFF // rgba
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la a2, fmt
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la a3, buffer
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jal easytext
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nop
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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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jpop 4, 1, ra
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fmt:
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.byte 0x25,0x73,0x00 // %s
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.align
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str:
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.byte 0x68,0x65,0x79,0x00 // hey
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.align
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textdata:
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.word 0, 0, 0, 0, 0
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easytext:
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// a0: xxxxyyyy
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// a1: rrggbbaa
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// a2: printf formatting string
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// a3: first argument for format string (optional)
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// TODO: support more than 4 args
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push 4, 1, s0, s1, ra
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la s0, textdata
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sw a0, 32(sp)
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sw a1, 36(sp)
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sw a2, 40(sp)
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sw a3, 44(sp)
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li t0, @TxtPrinter
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sw t0, 0(s0) // printer
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sw r0, 4(s0) // dlist end
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sh r0, 8(s0) // x
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sh r0, 10(s0) // y
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li t0, 0xC
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sw t0, 12(s0) // unknown
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sw r0, 16(s0) // color
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li t0, @global_context
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lw s1, 0(t0)
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lw t2, @dlist_offset(s1)
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mov a0, s0
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mov a1, t2
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jal @DoTxtStruct
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nop
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lbu a1, 36(sp)
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lbu a2, 37(sp)
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lbu a3, 38(sp)
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lbu t1, 39(sp)
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sw t1, 0x10(sp)
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jal @SetTextRGBA
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mov a0, s0
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lh a1, 32(sp)
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lh a2, 34(sp)
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jal @SetTextXY
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mov a0, s0
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lw a1, 40(sp)
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lw a2, 44(sp)
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jal @SetTextString
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mov a0, s0
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mov a0, s0
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jal @UpdateTxtStruct
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nop
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sw v0, @dlist_offset(s1)
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jpop 4, 1, s0, s1, ra
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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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