From d28bc0f946fcb7d6ad90b74f917db9fa9d311191 Mon Sep 17 00:00:00 2001 From: Gabe Black Date: Thu, 25 Jan 2018 00:03:26 -0800 Subject: cpu: Make the protobuf inst tracer accept variable sized instructions. This change adds an inst_bytes field which is of type bytes, and puts it in a oneof with the previously required inst field. If an instruction's encoding happens to be 4 bytes long, the original inst field will be used. Otherwise, the new variably sized inst_bytes field will be used. Because this tracer doesn't have visibility into how the data in inst_bytes is structured, it can't do any endian conversion itself. To maintain compatibility between producers and consumers who may have different endiannesses, all data should be manually converted to little endian before being stored in this field. inst will be converted into little endian by protobuf, and so compatibility doesn't have to be handled manually. Change-Id: I290713f70e7124d8aa9550c022c71334939d84a6 Reviewed-on: https://gem5-review.googlesource.com/7561 Reviewed-by: Andreas Sandberg Maintainer: Gabe Black --- src/proto/inst.proto | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/src/proto/inst.proto b/src/proto/inst.proto index 5ef266455..d561661f1 100644 --- a/src/proto/inst.proto +++ b/src/proto/inst.proto @@ -52,7 +52,10 @@ message InstHeader { message Inst { required uint64 pc = 1; - required fixed32 inst = 2; + oneof inst_oneof { + fixed32 inst = 2; + bytes inst_bytes = 9; + } optional uint32 nodeid = 3; optional uint32 cpuid = 4; optional fixed64 tick = 5; -- cgit v1.2.3