notwa/lips
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Code Issues Releases Wiki Activity

add offset option for jumps

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This commit is contained in:
Connor Olding 2015-12-17 07:19:24 -08:00
parent 91533bc083
commit f12fec5094
1 changed files with 9 additions and 5 deletions
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14
lips.lua
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@ -451,7 +451,7 @@ function Lexer:init(asm, fn)
end
local Dumper = Class()
function Dumper:init(writer, fn)
function Dumper:init(writer, fn, options)
self.writer = writer
self.fn = fn or '(string)'
self.labels = {}
@ -460,13 +460,15 @@ function Dumper:init(writer, fn)
self.pos = 0
self.size = 0
self.lastcommand = nil
self.options = options or {}
end
local Parser = Class()
function Parser:init(writer, fn)
function Parser:init(writer, fn, options)
self.fn = fn or '(string)'
self.dumper = Dumper(writer, fn)
self.dumper = Dumper(writer, fn, options)
self.defines = {}
self.options = options or {}
end
function Lexer:error(msg)
@ -1348,8 +1350,10 @@ function Dumper:desym(tok)
elseif all_registers[tok] then
return registers[tok] or fpu_registers[tok]
elseif tok[1] == 'LABELSYM' then
return self.labels[tok[2]]
local offset = self.options.offset or 0
return self.labels[tok[2]] + offset
elseif tok[1] == 'LABELREL' then
-- TODO: ensure label exists
local rel = floor(self.labels[tok[2]]/4)
rel = rel - 1 - floor(self.pos/4)
if rel > 0x8000 or rel <= -0x8000 then
@ -1533,7 +1537,7 @@ function assembler.assemble(fn_or_asm, writer, options)
f:close()
end
local parser = Parser(writer, fn)
local parser = Parser(writer, fn, options)
return parser:parse(asm)
end