I'm investigating whether I can use valgrind to simulate embedded
firmware.
In other words, to build the firmware for linux instead of the embedded
platform, then run it through valgrind plus a layer which intercepts any
reads/writes from peripheral blocks, and forwards them to/from a
simulation model of the hardware.
The firmware has hardwired pointers to peripherals, so I'd like to
detect reads & writes to the hardwired addresses.
I've got my own skeleton tool running, but don't know if I can get hold
of the untranslated guest data pointers from within the tool. Is it
possible? Something like below...
Best regards,
Andy
static
IRSB* sc_instrument ( VgCallbackClosure* closure,
IRSB* sbIn,
VexGuestLayout* layout,
VexGuestExtents* vge,
IRType gWordTy, IRType hWordTy )
{
// preamble
// for (each IRStmt)
{
switch (st->tag) {
case Ist_WrTmp:
if (guest_data_pointer in magic_address range)
{
// substitute Stmt with WrConst obtained from
model...
}
else
{
addStmtToIRSB( sbOut, st );
}
case Ist_Store:
if (guest_data_pointer in magic_address range)
{
// model.SetValue()
// add a no-op to sbOut
}
else
{
addStmtToIRSB( sbOut, st );
}
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