658     __ pushf();
 659     __ incrementl(ExternalAddress((address) StubRoutines::verify_oop_count_addr()));
 660     __ push(rdx);                                // save rdx
 661     // make sure object is 'reasonable'
 662     __ movptr(rax, Address(rsp, 4 * wordSize));    // get object
 663     __ testptr(rax, rax);
 664     __ jcc(Assembler::zero, exit);               // if obj is NULL it is ok
 665 
 666     // Check if the oop is in the right area of memory
 667     const int oop_mask = Universe::verify_oop_mask();
 668     const int oop_bits = Universe::verify_oop_bits();
 669     __ mov(rdx, rax);
 670     __ andptr(rdx, oop_mask);
 671     __ cmpptr(rdx, oop_bits);
 672     __ jcc(Assembler::notZero, error);
 673 
 674     // make sure klass is 'reasonable', which is not zero.
 675     __ movptr(rax, Address(rax, oopDesc::klass_offset_in_bytes())); // get klass
 676     __ testptr(rax, rax);
 677     __ jcc(Assembler::zero, error);              // if klass is NULL it is broken
 678     // TODO: Future assert that klass is lower 4g memory for UseCompressedKlassPointers
 679 
 680     // return if everything seems ok
 681     __ bind(exit);
 682     __ movptr(rax, Address(rsp, 5 * wordSize));  // get saved rax, back
 683     __ pop(rdx);                                 // restore rdx
 684     __ popf();                                   // restore EFLAGS
 685     __ ret(3 * wordSize);                        // pop arguments
 686 
 687     // handle errors
 688     __ bind(error);
 689     __ movptr(rax, Address(rsp, 5 * wordSize));  // get saved rax, back
 690     __ pop(rdx);                                 // get saved rdx back
 691     __ popf();                                   // get saved EFLAGS off stack -- will be ignored
 692     __ pusha();                                  // push registers (eip = return address & msg are already pushed)
 693     BLOCK_COMMENT("call MacroAssembler::debug");
 694     __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug32)));
 695     __ popa();
 696     __ ret(3 * wordSize);                        // pop arguments
 697     return start;
 698   }

 658     __ pushf();
 659     __ incrementl(ExternalAddress((address) StubRoutines::verify_oop_count_addr()));
 660     __ push(rdx);                                // save rdx
 661     // make sure object is 'reasonable'
 662     __ movptr(rax, Address(rsp, 4 * wordSize));    // get object
 663     __ testptr(rax, rax);
 664     __ jcc(Assembler::zero, exit);               // if obj is NULL it is ok
 665 
 666     // Check if the oop is in the right area of memory
 667     const int oop_mask = Universe::verify_oop_mask();
 668     const int oop_bits = Universe::verify_oop_bits();
 669     __ mov(rdx, rax);
 670     __ andptr(rdx, oop_mask);
 671     __ cmpptr(rdx, oop_bits);
 672     __ jcc(Assembler::notZero, error);
 673 
 674     // make sure klass is 'reasonable', which is not zero.
 675     __ movptr(rax, Address(rax, oopDesc::klass_offset_in_bytes())); // get klass
 676     __ testptr(rax, rax);
 677     __ jcc(Assembler::zero, error);              // if klass is NULL it is broken

 678 
 679     // return if everything seems ok
 680     __ bind(exit);
 681     __ movptr(rax, Address(rsp, 5 * wordSize));  // get saved rax, back
 682     __ pop(rdx);                                 // restore rdx
 683     __ popf();                                   // restore EFLAGS
 684     __ ret(3 * wordSize);                        // pop arguments
 685 
 686     // handle errors
 687     __ bind(error);
 688     __ movptr(rax, Address(rsp, 5 * wordSize));  // get saved rax, back
 689     __ pop(rdx);                                 // get saved rdx back
 690     __ popf();                                   // get saved EFLAGS off stack -- will be ignored
 691     __ pusha();                                  // push registers (eip = return address & msg are already pushed)
 692     BLOCK_COMMENT("call MacroAssembler::debug");
 693     __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug32)));
 694     __ popa();
 695     __ ret(3 * wordSize);                        // pop arguments
 696     return start;
 697   }