Registers[]
- def getRegs03(op):
getRegs03("blah R1 blah R3 blah R2 blah R5") => [1, 3, 2]
- def getRegsS(op):
getRegsS("blah R1 blah R3 blah R2 blah R5") => ["R1", "R3", "R2", "R5"]
Decoding instructions[]
ARM asm instructions are sometimes a big keyword made from mnemonics and some suffixes (conditional, mode, change flags, byte/word operation and maybe others.
- Mode suffixes: (IA|IB|DA|DB|FD|FA|ED|EA)
- Conditional suffixes: (AL|NV|EQ|NE|VS|VC|MI|PL|CS|CC|HI|LS|GE|LT|GT|LE)
- Flag change suffix: S
- Byte and Halfword: B and H
- def GetModeSuffix(ea):
returns the mode suffix string or "" e.g. if ea contains LDMIA blah blah, GetModeSuffix(ea) => "IA"
- def GetCondSuffix(ea):
returns the conditional suffix string or "" e.g. if ea contains ADDEQ blah blah, GetCondSuffix(ea) => "EQ"
- def GetExtraSuffixes(ea):
get a string with all suffixes except mode and condition
- def GetFlagSuffix(ea):
returns "S" or ""
- def GetByteSuffix(ea):
returns "B" or ""
- def GetHalfwordSuffix(ea):
returns "H" or ""
- def OppositeSuffix(s):
OppositeSuffix("EQ") => NE
OppositeSuffix("MI") => PL
and so on...
- def ChangesFlags(ea):
True if the instruction at "ea" changes flags, False otherwise.
- isFuncStart(ea):
True if ea is the first instruction of a function, else False
Binary/Hex stuff[]
- Bit functions copied from http://wiki.python.org/moin/BitManipulation
- def setBit01(old, offset, value):
def setBit01(old, offset, value):
if value: setBit(old, offset)
else: clearBit(old, offset)
- def hex(x):
hex(10) => "A" hex(-1) => "FFFFFFFF"