segfault after call_VM

[Xin Tong]

I am using call_VM to implement a callout to a C function I implemented
from the dynamically generated interpreter code. but the program segfaults
after return from call_VM.  Does not call_VM set up code that save and
restores registers so that the generated interpreter code can continue
correctly ? If not, what assembler functions can i use to implement the
callout to C functions.


// Jump to from_interpreted entry of a call unless single stepping is
possible
// in this thread in which case we must call the i2i entry
void InterpreterMacroAssembler::jump_from_interpreted(Register method,
Register temp) {


  prepare_to_jump_from_interpreted();
  ....

  // XIN TONG. THIS IS JUST BEFORE A METHOD IS CALLED.
  // generate a call to static routine.
  call_VM(noreg, CAST_FROM_FN_PTR(address,
InterpreterRuntime::test_static_rountine));

  jmp(Address(method, methodOopDesc::from_interpreted_offset()));

}


Thank you,

Xin
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