From 38b47b19ec3adf6a96d68726dc29096b3aad780a Mon Sep 17 00:00:00 2001 From: "Emilio G. Cota" Date: Fri, 7 Dec 2018 15:33:56 -0500 Subject: plugin-gen: add module for TCG-related code MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit We first inject empty instrumentation from translator_loop. After translation, we go through the plugins to see what they want to register for, filling in the empty instrumentation. If if turns out that some instrumentation remains unused, we remove it. This approach supports the following features: - Inlining TCG code for simple operations. Note that we do not export TCG ops to plugins. Instead, we give them a C API to insert inlined ops. So far we only support adding an immediate to a u64, e.g. to count events. - "Direct" callbacks. These are callbacks that do not go via a helper. Instead, the helper is defined at run-time, so that the plugin code is directly called from TCG. This makes direct callbacks as efficient as possible; they are therefore used for very frequent events, e.g. memory callbacks. - Passing the host address to memory callbacks. Most of this is implemented in a later patch though. - Instrumentation of memory accesses performed from helpers. See the corresponding comment, as well as a later patch. Signed-off-by: Emilio G. Cota [AJB: add alloc_tcg_plugin_context, use glib, rm hwaddr] Signed-off-by: Alex Bennée Reviewed-by: Richard Henderson --- include/exec/helper-tcg.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/exec/helper-tcg.h') diff --git a/include/exec/helper-tcg.h b/include/exec/helper-tcg.h index 268e0f804b..573c2ce2e9 100644 --- a/include/exec/helper-tcg.h +++ b/include/exec/helper-tcg.h @@ -55,6 +55,7 @@ #include "helper.h" #include "trace/generated-helpers.h" #include "tcg-runtime.h" +#include "plugin-helpers.h" #undef str #undef DEF_HELPER_FLAGS_0 -- cgit v1.2.3