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(attempt to) abide to calling conventions

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i haven't checked if i need double-word alignment
This commit is contained in:
Connor Olding 2015-12-17 22:59:32 -08:00
parent 7c35d99a9f
commit 9a2757d16d
4 changed files with 31 additions and 21 deletions
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3
Lua/README.md
View file

@ -40,6 +40,9 @@ which produces [a large csv file.][csv]
Tests the fastest form of basic movement in Majora's Mask.
Run it in the Clock Town Great Fairy's Fountain.
#### inject.lua
Assembles and injects an assembly subroutine into the game.
#### oneshot.lua
Instantly gives you all the items in the game, etc.

12
Lua/inject.lua
View file

@ -37,14 +37,16 @@ local ow_before_addr = (ow_before % 0x4000000)*4
local header = ("[overwritten]: 0x%08X\n"):format(ow_before_addr)
header = header..[[
sw ra, -4(sp)
// TODO: optimize for size
// TODO: fix case where overwritten function takes 5+ args
push ra
push a0, a1, a2, a3
bal start
subi sp, sp, 4
nop
pop a0, a1, a2, a3
jal @overwritten
nop
lw ra, 0(sp)
jr
addi sp, sp, 4
jpop ra
start:
]]

9
Lua/inject/crap.asm
View file

@ -24,7 +24,7 @@
[cosf]: 0x80091F40
main:
push ra, a0, s1, s3, s4
push 4, s1, s3, s4, ra
// s1: current actor ptr
// s3: current actor type ptr
// s4: current actor type index
@ -70,12 +70,11 @@ continue:
bne s4, t0, typeloop
addi s3, s3, @actorlist_dead_space
jpop ra, a0, s1, s3, s4
jpop 4, s1, s3, s4, ra
process_actor: // args: a0. returns nothing.
// TODO: ignore bomb explosions, they share the same type
push r0, ra, s0, s1
// 0(sp) reserved for sinf/cosf
push 4, s0, s1, ra
// s0: result of sin
// s1: result of cos
lh t0, 0(a0)
@ -128,7 +127,7 @@ process_actor: // args: a0. returns nothing.
sw t5, current_rotation
process_actor_return:
jpop r0, ra, s0, s1
jpop 4, s0, s1, ra
rotations:
.word 0x00000000 // pi*0/6

28
Lua/inject/lips.lua
View file

@ -1034,31 +1034,37 @@ function Parser:instruction()
local addi = instructions['ADDI']
local w = instructions[h == 'PUSH' and 'SW' or 'LW']
local jr = instructions['JR']
local registers = {}
local stack = {}
while not self:is_EOL() do
local r = self:register()
table.insert(registers, r)
if self.tt == 'NUM' then
if self.tok < 0 then
self:error("can't push a negative number of spaces")
end
for i=1,self.tok do
table.insert(stack, '')
end
self:advance()
else
table.insert(stack, self:register())
end
if not self:is_EOL() then
self:optional_comma()
end
end
if #registers == 0 then
if #stack == 0 then
self:error(h..' requires at least one argument')
end
if #registers >= 0x8000/4 then
self:error("that's way too many registers bub")
end
local args = {}
if h == 'PUSH' then
args.rt = 'SP'
args.rs = 'SP'
args.immediate = {'NEGATE', {'NUM', #registers*4}}
args.immediate = {'NEGATE', {'NUM', #stack*4}}
self:format_out(addi[3], addi[1], args, addi[4], addi[5])
end
args.base = 'SP'
for i, r in ipairs(registers) do
for i, r in ipairs(stack) do
args.rt = r
if r ~= 'R0' then
if r ~= '' then
args.offset = {'NUM', (i - 1)*4}
self:format_out(w[3], w[1], args, w[4], w[5])
end
@ -1070,7 +1076,7 @@ function Parser:instruction()
if h == 'POP' or h == 'JPOP' then
args.rt = 'SP'
args.rs = 'SP'
args.immediate = {'NUM', #registers*4}
args.immediate = {'NUM', #stack*4}
self:format_out(addi[3], addi[1], args, addi[4], addi[5])
end
elseif h == 'NAND' then