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"