Revision: 19461
Author: [email protected]
Date: Tue Feb 18 17:10:04 2014 UTC
Log: A64: Let the Simulator trap BLR XZR instructions.
This instruction is used as a guard for the constant pool.
[email protected]
Review URL: https://codereview.chromium.org/170673003
http://code.google.com/p/v8/source/detail?r=19461
Modified:
/branches/bleeding_edge/src/a64/simulator-a64.cc
=======================================
--- /branches/bleeding_edge/src/a64/simulator-a64.cc Mon Feb 17 15:20:54
2014 UTC
+++ /branches/bleeding_edge/src/a64/simulator-a64.cc Tue Feb 18 17:10:04
2014 UTC
@@ -986,6 +986,11 @@
switch (instr->Mask(UnconditionalBranchToRegisterMask)) {
case BLR: {
set_lr(instr->NextInstruction());
+ if (instr->Rn() == 31) {
+ // BLR XZR is used as a guard for the constant pool. We should
never hit
+ // this, but if we do trap to allow debugging.
+ Debug();
+ }
// Fall through.
}
case BR:
--
--
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