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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, ow_before = 0x0C03151F,
}, },
} }
injection_points['O JP10'] = injection_points['O US10']
local header = [[ local header = [[
[overwritten]: 0x%08X [overwritten]: 0x%08X
// TODO: optimize for size // note: this will fail when the overwritten function takes args on stack
// TODO: fix case where overwritten function takes 5+ args sw ra, -4(sp)
push ra sw a0, 0(sp)
push a0, a1, a2, a3 sw a1, 4(sp)
sw a2, 8(sp)
sw a3, 12(sp)
bal start bal start
nop subi sp, sp, 20
pop a0, a1, a2, a3 lw ra, 16(sp)
jal @overwritten lw a0, 20(sp)
nop lw a1, 24(sp)
jpop ra lw a2, 28(sp)
lw a3, 32(sp)
j @overwritten
addi sp, sp, 20
start: start:
]] ]]
injection_points['O JP10'] = injection_points['O US10']
function inject(fn) function inject(fn)
local asm_dir = bizstring and 'inject/' or './mm/Lua/inject/' local asm_dir = bizstring and 'inject/' or './mm/Lua/inject/'
local asm_path = asm_dir..fn local asm_path = asm_dir..fn