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optimize basic hook for size

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This commit is contained in:
Connor Olding 2016-01-10 11:58:16 -08:00
parent c3c9d632e0
commit 8f599e1e9f
1 changed files with 15 additions and 11 deletions
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26
Lua/inject.lua
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@ -30,24 +30,28 @@ local injection_points = {
ow_before = 0x0C03151F,
},
}
injection_points['O JP10'] = injection_points['O US10']
local header = [[
[overwritten]: 0x%08X
// TODO: optimize for size
// TODO: fix case where overwritten function takes 5+ args
push ra
push a0, a1, a2, a3
// note: this will fail when the overwritten function takes args on stack
sw ra, -4(sp)
sw a0, 0(sp)
sw a1, 4(sp)
sw a2, 8(sp)
sw a3, 12(sp)
bal start
nop
pop a0, a1, a2, a3
jal @overwritten
nop
jpop ra
subi sp, sp, 20
lw ra, 16(sp)
lw a0, 20(sp)
lw a1, 24(sp)
lw a2, 28(sp)
lw a3, 32(sp)
j @overwritten
addi sp, sp, 20
start:
]]
injection_points['O JP10'] = injection_points['O US10']
function inject(fn)
local asm_dir = bizstring and 'inject/' or './mm/Lua/inject/'
local asm_path = asm_dir..fn