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Code Issues Releases Wiki Activity

ensure labels exist

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This commit is contained in:
Connor Olding 2015-12-17 07:22:43 -08:00
parent f12fec5094
commit b60ca90873
1 changed files with 10 additions and 4 deletions
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14
lips.lua
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@ -1350,12 +1350,18 @@ function Dumper:desym(tok)
elseif all_registers[tok] then
return registers[tok] or fpu_registers[tok]
elseif tok[1] == 'LABELSYM' then
local label = self.labels[tok[2]]
if label == nil then
self:error('undefined label')
end
local offset = self.options.offset or 0
return self.labels[tok[2]] + offset
return label + 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)
local label = self.labels[tok[2]]
if label == nil then
self:error('undefined label')
end
local rel = floor(label/4) - 1 - floor(self.pos/4)
if rel > 0x8000 or rel <= -0x8000 then
self:error('branch too far')
end