Let's use asm offset instead of hardcoded values...

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26070 a95241bf-73f2-0310-859d-f6bbb57e9c96
2008-06-21 23:41:36 +00:00
parent b409283372
commit ffa2f65116
1 changed files with 60 additions and 0 deletions
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2007, Ingo Weinhold, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+
+// This file is used to get C structure offsets into assembler code.
+// The build system assembles the file and processes the output to create
+// a header file with macro definitions, that can be included from assembler
+// code.
+
+#include <arch_cpu.h>
+#include <ksyscalls.h>
+#include <thread_types.h>
+
+
+#define DEFINE_MACRO(macro, value) \
+	asm volatile("#define " #macro " %0" : : "i" (value))
+
+#define DEFINE_OFFSET_MACRO(prefix, structure, member) \
+    DEFINE_MACRO(prefix##_##member, offsetof(struct structure, member));
+
+#define DEFINE_SIZEOF_MACRO(prefix, structure) \
+    DEFINE_MACRO(prefix##_sizeof, sizeof(struct structure));
+
+
+void
+dummy()
+{
+	// struct thread
+	DEFINE_OFFSET_MACRO(THREAD, thread, kernel_time);
+	DEFINE_OFFSET_MACRO(THREAD, thread, user_time);
+	DEFINE_OFFSET_MACRO(THREAD, thread, last_time);
+	DEFINE_OFFSET_MACRO(THREAD, thread, in_kernel);
+	DEFINE_OFFSET_MACRO(THREAD, thread, flags);
+	DEFINE_OFFSET_MACRO(THREAD, thread, kernel_stack_top);
+	DEFINE_OFFSET_MACRO(THREAD, thread, fault_handler);
+
+	// struct iframe
+	DEFINE_OFFSET_MACRO(IFRAME, iframe, cs);
+	DEFINE_OFFSET_MACRO(IFRAME, iframe, eax);
+	DEFINE_OFFSET_MACRO(IFRAME, iframe, edx);
+	DEFINE_OFFSET_MACRO(IFRAME, iframe, orig_eax);
+	DEFINE_OFFSET_MACRO(IFRAME, iframe, vector);
+	DEFINE_OFFSET_MACRO(IFRAME, iframe, eip);
+	DEFINE_OFFSET_MACRO(IFRAME, iframe, flags);
+	DEFINE_OFFSET_MACRO(IFRAME, iframe, user_esp);
+
+	// struct vm86_iframe
+	DEFINE_SIZEOF_MACRO(VM86_IFRAME, vm86_iframe);
+	DEFINE_OFFSET_MACRO(VM86_IFRAME, vm86_iframe, flags);
+
+	// struct syscall_info
+	DEFINE_SIZEOF_MACRO(SYSCALL_INFO, syscall_info);
+	DEFINE_OFFSET_MACRO(SYSCALL_INFO, syscall_info, function);
+	DEFINE_OFFSET_MACRO(SYSCALL_INFO, syscall_info, parameter_size);
+
+	// struct x86_optimized_functions
+	DEFINE_OFFSET_MACRO(X86_OPTIMIZED_FUNCTIONS, x86_optimized_functions,
+		memcpy);
+}