439 __ nop();
440
441 // generate code for exception handler
442 address handler_base = __ start_a_stub(exception_handler_size);
443 if (handler_base == NULL) {
444 // not enough space left for the handler
445 bailout("exception handler overflow");
446 return -1;
447 }
448
449 int offset = code_offset();
450
451 // the exception oop and pc are in rax, and rdx
452 // no other registers need to be preserved, so invalidate them
453 __ invalidate_registers(false, true, true, false, true, true);
454
455 // check that there is really an exception
456 __ verify_not_null_oop(rax);
457
458 // search an exception handler (rax: exception oop, rdx: throwing pc)
459 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::handle_exception_nofpu_id)));
460
461 __ stop("should not reach here");
462
463 assert(code_offset() - offset <= exception_handler_size, "overflow");
464 __ end_a_stub();
465
466 return offset;
467 }
468
469
470 // Emit the code to remove the frame from the stack in the exception
471 // unwind path.
472 int LIR_Assembler::emit_unwind_handler() {
473 #ifndef PRODUCT
474 if (CommentedAssembly) {
475 _masm->block_comment("Unwind handler");
476 }
477 #endif
478
479 int offset = code_offset();
480
481 // Fetch the exception from TLS and clear out exception related thread state
482 __ get_thread(rsi);
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439 __ nop();
440
441 // generate code for exception handler
442 address handler_base = __ start_a_stub(exception_handler_size);
443 if (handler_base == NULL) {
444 // not enough space left for the handler
445 bailout("exception handler overflow");
446 return -1;
447 }
448
449 int offset = code_offset();
450
451 // the exception oop and pc are in rax, and rdx
452 // no other registers need to be preserved, so invalidate them
453 __ invalidate_registers(false, true, true, false, true, true);
454
455 // check that there is really an exception
456 __ verify_not_null_oop(rax);
457
458 // search an exception handler (rax: exception oop, rdx: throwing pc)
459 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::handle_exception_from_callee_id)));
460 __ should_not_reach_here();
461 assert(code_offset() - offset <= exception_handler_size, "overflow");
462 __ end_a_stub();
463
464 return offset;
465 }
466
467
468 // Emit the code to remove the frame from the stack in the exception
469 // unwind path.
470 int LIR_Assembler::emit_unwind_handler() {
471 #ifndef PRODUCT
472 if (CommentedAssembly) {
473 _masm->block_comment("Unwind handler");
474 }
475 #endif
476
477 int offset = code_offset();
478
479 // Fetch the exception from TLS and clear out exception related thread state
480 __ get_thread(rsi);
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