> Is there any information on adding support for unsupported instructions?
At this point, with >99% of instructions already recognized,
then you should reason by analogy. Use a debugger such as gdb
to trace the execution under valgrind of a similar instruction,
then modify and extend to handle the unimplemented instruction.
For a 'rotate' instruction, use the corresponding right-shift.
Hints:
Assemble the two-line program
_start: .globl _start
.word <the-bits-for-your-instruction>
using
gcc -nostartfiles -nodefaultlibs -nostdlib foo.S
to get an executable file with a .text that has 4==.p_memsz.
Then run memcheck on that executable.
Run "valgrind --help-debug" and look carefully at "Vex options
for all Valgrind tools", particularly --trace-flags.
Read "Debugging Valgrind with GDB" in README_DEVELOPERS.
The code is in VEX/priv/guest_arm*
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