2978 // Callee-saved registers will be the same as the frame above (i.e.,
2979 // handle_exception_stub), since they were restored when we got the
2980 // exception.
2981
2982 OopMapSet* oop_maps = new OopMapSet();
2983
2984 oop_maps->add_gc_map(the_pc - start, new OopMap(SimpleRuntimeFrame::framesize, 0));
2985
2986 __ reset_last_Java_frame(false, true);
2987
2988 // Restore callee-saved registers
2989
2990 // rfp is an implicitly saved callee saved register (i.e. the calling
2991 // convention will save restore it in prolog/epilog) Other than that
2992 // there are no callee save registers now that adapter frames are gone.
2993 // and we dont' expect an arg reg save area
2994 __ ldp(rfp, r3, Address(__ post(sp, 2 * wordSize)));
2995
2996 // r0: exception handler
2997
2998 // Restore SP from BP if the exception PC is a MethodHandle call site.
2999 __ ldrw(rscratch1, Address(rthread, JavaThread::is_method_handle_return_offset()));
3000 // n.b. Intel uses special register rbp_mh_SP_save here but we will
3001 // just hard wire rfp
3002 __ cmpw(rscratch1, zr);
3003 // the obvious way to conditionally copy rfp to sp if NE
3004 // Label skip;
3005 // __ br(Assembler::EQ, skip);
3006 // __ mov(sp, rfp);
3007 // __ bind(skip);
3008 // same but branchless
3009 __ mov(rscratch1, sp);
3010 __ csel(rscratch1, rfp, rscratch1, Assembler::NE);
3011 __ mov(sp, rscratch1);
3012
3013 // We have a handler in r0 (could be deopt blob).
3014 __ mov(r8, r0);
3015
3016 // Get the exception oop
3017 __ ldr(r0, Address(rthread, JavaThread::exception_oop_offset()));
3018 // Get the exception pc in case we are deoptimized
3019 __ ldr(r4, Address(rthread, JavaThread::exception_pc_offset()));
3020 #ifdef ASSERT
3021 __ str(zr, Address(rthread, JavaThread::exception_handler_pc_offset()));
3022 __ str(zr, Address(rthread, JavaThread::exception_pc_offset()));
3023 #endif
3024 // Clear the exception oop so GC no longer processes it as a root.
3025 __ str(zr, Address(rthread, JavaThread::exception_oop_offset()));
3026
3027 // r0: exception oop
3028 // r8: exception handler
3029 // r4: exception pc
3030 // Jump to handler
3031
3032 __ br(r8);
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2978 // Callee-saved registers will be the same as the frame above (i.e.,
2979 // handle_exception_stub), since they were restored when we got the
2980 // exception.
2981
2982 OopMapSet* oop_maps = new OopMapSet();
2983
2984 oop_maps->add_gc_map(the_pc - start, new OopMap(SimpleRuntimeFrame::framesize, 0));
2985
2986 __ reset_last_Java_frame(false, true);
2987
2988 // Restore callee-saved registers
2989
2990 // rfp is an implicitly saved callee saved register (i.e. the calling
2991 // convention will save restore it in prolog/epilog) Other than that
2992 // there are no callee save registers now that adapter frames are gone.
2993 // and we dont' expect an arg reg save area
2994 __ ldp(rfp, r3, Address(__ post(sp, 2 * wordSize)));
2995
2996 // r0: exception handler
2997
2998 // We have a handler in r0 (could be deopt blob).
2999 __ mov(r8, r0);
3000
3001 // Get the exception oop
3002 __ ldr(r0, Address(rthread, JavaThread::exception_oop_offset()));
3003 // Get the exception pc in case we are deoptimized
3004 __ ldr(r4, Address(rthread, JavaThread::exception_pc_offset()));
3005 #ifdef ASSERT
3006 __ str(zr, Address(rthread, JavaThread::exception_handler_pc_offset()));
3007 __ str(zr, Address(rthread, JavaThread::exception_pc_offset()));
3008 #endif
3009 // Clear the exception oop so GC no longer processes it as a root.
3010 __ str(zr, Address(rthread, JavaThread::exception_oop_offset()));
3011
3012 // r0: exception oop
3013 // r8: exception handler
3014 // r4: exception pc
3015 // Jump to handler
3016
3017 __ br(r8);
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