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Code Issues Releases Wiki Activity

allow dumb injection

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This commit is contained in:
Connor Olding 2016-04-09 01:54:43 -07:00
parent f73760f200
commit 25cbd24a2e
1 changed files with 34 additions and 18 deletions
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52
Lua/inject.lua
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@ -4,6 +4,8 @@ local addrs = require "addrs"
require "messages"
local assemble = require "lips"
local unpack = unpack or table.unpack
local injection_points = {
['M US10'] = {
inject_addr = 0x780000,
@ -46,6 +48,13 @@ local injection_points = {
}
injection_points['O JP10'] = injection_points['O US10']
local no_point = {
inject_addr = 0,
inject_maxlen = 0x800000,
ow_addr = 0,
ow_before = 0,
}
local hook = [[
[hooked]: 0x%08X
// note: this will fail when the hooked function takes args on stack
@ -66,18 +75,18 @@ local hook = [[
start:
]]
local function inject(fn)
local function inject(fn, dumb)
local asm_dir = bizstring and 'inject/' or './mm/Lua/inject/'
local asm_path = asm_dir..fn
local point = injection_points[version]
local point = dumb and no_point or injection_points[version]
if point == nil then
print("Sorry, inject.lua is unimplemented for your game version.")
return
end
-- seemingly unused region of memory
local inject_addr = point.inject_addr
local inject_addr = point.inject_addr % 0x80000000
-- how much room we have to work with
local inject_maxlen = point.inject_maxlen
-- the jal instruction to overwrite with our hook
@ -89,7 +98,7 @@ local function inject(fn)
-- encode our jal instruction
local ow_after = 0x0C000000 + math.floor(inject_addr/4)
if R4(ow_addr) ~= ow_before and R4(ow_addr) ~= ow_after then
if not dumb and R4(ow_addr) ~= ow_before and R4(ow_addr) ~= ow_after then
print("Can't inject -- game code is different!")
return
end
@ -117,12 +126,16 @@ local function inject(fn)
-- offset assembly labels so they work properly, and assemble!
local true_offset = 0x80000000 + inject_addr
assemble(hook, write, {unsafe=true, offset=true_offset})
assemble(asm_path, write, {unsafe=true, offset=true_offset + size})
if not dumb then
assemble(hook, write, {unsafe=true, offset=true_offset})
assemble(asm_path, write, {unsafe=true, offset=true_offset + size})
else
assemble(asm_path, write, {unsafe=true, offset=true_offset})
end
print_deferred()
printf("size: %i words", size/4)
if cons_pos >= inject_end then
if not dumb and cons_pos >= inject_end then
print("Assembly too large!")
print("The game will probably crash.")
end
@ -131,9 +144,11 @@ local function inject(fn)
W1(pos, val)
end
-- finally, write our new jump over the original
printf('%08X: %08X', ow_addr, ow_after)
W4(ow_addr, ow_after)
if not dumb then
-- finally, write our new jump over the original
printf('%08X: %08X', ow_addr, ow_after)
W4(ow_addr, ow_after)
end
-- force code cache to be reloaded
if bizstring then
@ -146,17 +161,18 @@ local function inject(fn)
end
local asms = {
['O US10'] = 'spawn oot.asm',
['O JP10'] = 'spawn oot.asm',
['O EUDB MQ'] = 'widescreen.asm',
['O US10'] = {'spawn oot.asm'},
['O JP10'] = {'spawn oot.asm'},
['O EUDB MQ'] = {'widescreen.asm'},
-- ['O EUDB MQ'] = {'widescreen-inline.asm', true},
['M US10'] = 'beta.asm',
['M JP10'] = 'spawn mm early.asm',
['M US10'] = {'beta.asm'},
['M JP10'] = {'spawn mm early.asm'},
}
local asm = asms[version]
if asm then
inject(asm)
local args = asms[version]
if args then
inject(unpack(args))
else
print('no appropriate assembly found for this game')
end