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GH*master
Expert Cheater
 Reputation: 8
Joined: 10 Jan 2008
Posts: 159
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 Posted: Sun Jun 18, 2017 2:49 am Post subject: Get table of EFLAGS |
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| Code: | function to_BitsNew(num,bits)
bits = bits or math.max(1, select(2, math.frexp(num)))
local t = {}
for b = bits, 1, -1 do
t[b] = math.fmod(num, 2)
num = math.floor((num - t[b]) / 2)
end
return t
end
function get_EFLAGS()
local bitsTable = to_BitsNew(EFLAGS,32)
local tableEFLAGS =
{
OF = bitsTable[21],
DF = bitsTable[22],
SF = bitsTable[25],
ZF = bitsTable[26],
AF = bitsTable[28],
PF = bitsTable[30],
CF = bitsTable[32]
}
return tableEFLAGS
end
local tableEFLAGS = get_EFLAGS()
for k,v in pairce(tableEFLAGS) do
print(string.format('%s :'..'%s', k, v))
end |
| Description: |
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| Filesize: |
49.49 KB |
| Viewed: |
7606 Time(s) |
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FreeER
Grandmaster Cheater Supreme
![]() Reputation: 53
Joined: 09 Aug 2013
Posts: 1091
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| Posted: Sun Jun 18, 2017 7:31 am Post subject: |
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Nice! Though I think you have a typo with pairce, shouldn't that be pairs or is that a function you've created? Otherwise it seems to work great except for the error when EFLAGS is nil (if you have not broken anywhere yet) 
a check and an additional return of debug_isBroken() would let the caller check if the flags are "current"/up-to-date or simply what was set on the last breakpoint (who knows when ago lol)
| Code: | -- returns table of "bits" bits (defaults to log_2 of num) from num
function to_BitsNew(num,bits)
bits = bits or math.max(1, select(2, math.frexp(num)))
local t = {}
for b = bits, 1, -1 do
t[b] = math.fmod(num, 2)
num = math.floor((num - t[b]) / 2)
end
return t
end
--[[
returns nil (3 times) if EFLAGS is nil (debugger hasn't broken before)
returns the table of OF, DF, SF, ZF, AF, PF, and CF (all status flags + DF),
a bool to tell if the flags are up-to-date (currently just if the debugger is broken)
and the intermediate bits table because we already did the work to get it...
]]
function get_EFLAGS()
if not EFLAGS then return nil, nil, nil end
local bitsTable = to_BitsNew(EFLAGS,32)
local tableEFLAGS =
{
OF = bitsTable[21],
DF = bitsTable[22],
SF = bitsTable[25],
ZF = bitsTable[26],
AF = bitsTable[28],
PF = bitsTable[30],
CF = bitsTable[32]
}
return tableEFLAGS, debug_isBroken(), bitsTable
end
local tableEFLAGS, isUpdated, fullBitTable = get_EFLAGS()
print("Flags updated: " .. tostring(isUpdated))
if not tableEFLAGS then return end
for k,v in pairs(tableEFLAGS) do
print(string.format('%s: %s', k, v))
end |
While it's of course possible to simply assume the caller will check debug_isBorken on their own... some won't know about it unless told and also it allows you (or someone else) to come back later and improve that result (for instance, if you change the flags in the memory viewer the EFLAGS value doesn't update until you step/continue; I did try using debug_setContext to see if that would update it, no luck).
BTW, what was the point of format if you're going to concatenate the : anyways? Didn't even see that until I started messing with the output to check something
edit: not sure if it'd be more useful to simply have something like this (obviously could be done without metatables but I felt like playing with them since I rarely do lol)
| Code: | FLAGPOWS = {CFPOW=0, PFPOW=2, AFPOW=4, ZFPOW=6, SFPOW=7, TFPOW=8, IFPOW=9, DFPOW=10, OFPOW=11}
for k,v in pairs(FLAGPOWS) do FLAGPOWS[k] = math.pow(2,v) end
FLAGS = {}
FLAGSMT = {__index = function(table, index)
iupper = index:upper()
if iupper == "CURRENT" or iupper == "UPTODATE" then return debug_isBroken() end
if not FLAGPOWS[iupper.."POW"] then error(string.format("%s is not a valid flag", iupper)) end
debug_getContext(); return (bAnd(EFLAGS, FLAGPOWS[iupper.."POW"]) ~= 0)
end,
__tostring = function(table) for k,v in pairs(FLAGPOWS) do flag = k:sub(0,-4); print(string.format("%s: %s", flag, FLAGS[flag])) end end,
__newindex = function(table,index,value)
mask = FLAGPOWS[index:upper().."POW"]; if value == 0 then EFLAGS = bAnd(EFLAGS, bNot(mask)) else EFLAGS = bOr(EFLAGS, mask) end
debug_setContext(); --debug_updateGUI()
end}
setmetatable(FLAGS,FLAGSMT)
print(tostring(FLAGS))
FLAGS.of = 1
FLAGS.zf = 0
FLAGS.AF = 1
FLAGS.CF = 1
print("\n")
print(tostring(FLAGS.of))
print(tostring(FLAGS.ZF))
print(tostring(FLAGS.AF))
print("\n")
print(tostring(FLAGS))
--print(string.format("testing is %s", FLAGS.testing))
pcall(function() print(string.format("testing is %s", FLAGS.testing)) end)
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edit2: to make use of the bitwise operators DB showed (also a couple fixes and a "feature"):
| Code: | FLAGPOWS = {CFPOW=1<<0, PFPOW=1<<2, AFPOW=1<<4, ZFPOW=1<<6, SFPOW=1<<7, TFPOW=1<<8, IFPOW=1<<9, DFPOW=1<<10, OFPOW=1<<11}
FLAGS = {}
FLAGSMT = {__index = function(table, index)
if type(index) == "string" then
iupper = index:upper()
if iupper == "CURRENT" or iupper == "UPTODATE" then return debug_isBroken() end
debug_getContext() if not EFLAGS then return nil end
if FLAGPOWS[iupper.."POW"] then return EFLAGS & FLAGPOWS[iupper.."POW"] ~= 0 end
elseif type(index) == "number" and index >= 0 and index < 33 then
debug_getContext(); return EFLAGS & 1<<math.floor(index) ~= 0
else error(string.format("'%s' is not a valid flag", iupper)) end
end,
__tostring = function(table) print("current: "..tostring(FLAGS.current));
for k,v in pairs(FLAGPOWS) do flag = k:sub(0,-4); print(string.format("%s: %s", flag, FLAGS[flag])) end end,
__newindex = function(table,index,value) -- anyway to signal error other than error? hm....
mask = FLAGPOWS[index:upper().."POW"]; if not EFLAGS then error("Could not set flag " .. tostring(index)) end
if value == 0 then EFLAGS = EFLAGS & ~mask else EFLAGS = EFLAGS | mask end
debug_setContext(); --debug_updateGUI()
end}
setmetatable(FLAGS,FLAGSMT)
FLAGS.af = 1
print('af = ' .. tostring(FLAGS[4]))
print(tostring(FLAGS))
--debug_updateGUI()
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As DB showed most of this code is to let you use names.
Last edited by FreeER on Mon Jun 19, 2017 8:48 am; edited 1 time in total |
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Dark Byte
Site Admin
 Reputation: 458
Joined: 09 May 2003
Posts: 25284
Location: The netherlands
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| Posted: Mon Jun 19, 2017 4:11 am Post subject: |
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here are some functions to get a specific bit and set a specific bit
| Code: |
function isBitSet(value,bitnr)
return value & (1<<bitnr)~=0
end
function setBit(value,bitnr,state)
local bm=1<<bitnr
if state then
return value | bm
else
return value & ~bm
end
end
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_________________
Do not ask me about online cheats. I don't know any and wont help finding them.
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GH*master
Expert Cheater
Reputation: 8
Joined: 10 Jan 2008
Posts: 159
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| Posted: Mon Jun 19, 2017 4:49 am Post subject: |
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Many thanks 
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FreeER
Grandmaster Cheater Supreme
![]() Reputation: 53
Joined: 09 Aug 2013
Posts: 1091
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| Posted: Mon Jun 19, 2017 8:52 am Post subject: |
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@DB hm, does lua have bitwise operators or is that just CE? All I saw from google searches was libraries adding functions like bAnd etc.
Nice to know regardless, thanks
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Dark Byte
Site Admin
Reputation: 458
Joined: 09 May 2003
Posts: 25284
Location: The netherlands
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| Posted: Mon Jun 19, 2017 9:06 am Post subject: |
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ce 6.5.1 and later uses lua 5.3
it has built-in binary operators
_________________
Do not ask me about online cheats. I don't know any and wont help finding them.
Like my help? Join me on Patreon so i can keep helping |
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