Parameterize architecture-specific details

Abstract architecture details into architecture.h and add x86 constants.
This is slightly complicated by the fact that 64-bit hosts can run
32-bit code, so we do still need to resolve some values dynamically.

The architecture_info() function is intented to address this, and
performs parameter lookups based on the current state of the guest
process.

Resolving values on a per-process-state basis is important due to the
process model under Linux.  If we fork to debug a 32-bit program, the
forked process will be native 64-bit until the execve system call.  And
of course, the process is then free to exec anything it likes later on
as well.

Signed-off-by: Malfurious <m@lfurio.us>

1 files changed, 3 insertions, 2 deletions

diff --git a/debugger.h b/debugger.h
index f14459f..b26adf8 100644
--- a/debugger.h
+++ b/debugger.h
@@ -1,8 +1,8 @@
 #pragma once
 
-#include <sys/user.h>
 #include <unistd.h>
 
+#include "architecture.h"
 #include "list.h"
 
 struct breakpoint {
@@ -29,7 +29,8 @@ struct map {
 
 struct state {
     LINKEDLIST;
-    struct user_regs_struct regs;
+    size_t regsize;
+    user_regs_t regs;
     struct list maps;
 };