sys: extend kvm support

Add new pseudo syscall syz_kvm_setup_cpu that setups VCPU into
interesting states for execution. KVM is too difficult to setup otherwise.
Lots of improvements possible, but this is a starting point.

1 files changed, 33 insertions, 0 deletions

diff --git a/executor/kvm_gen.cc b/executor/kvm_gen.cc
new file mode 100644
index 000000000..5290bd2e7
--- /dev/null
+++ b/executor/kvm_gen.cc
@@ -0,0 +1,33 @@
+// Copyright 2017 syzkaller project authors. All rights reserved.
+// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+// +build
+
+#include <stdio.h>
+
+#define PRINT(x)                                   \
+	extern const unsigned char x[], x##_end[]; \
+	print(#x, x, x##_end);
+
+void print(const char* name, const unsigned char* start, const unsigned char* end)
+{
+	printf("const char %s[] = \"", name);
+	for (const unsigned char* p = start; p < end; p++)
+		printf("\\x%02x", *p);
+	printf("\";\n");
+}
+
+int main()
+{
+	printf("// AUTOGENERATED FILE\n");
+	PRINT(kvm_asm16_cpl3);
+	PRINT(kvm_asm32_paged);
+	PRINT(kvm_asm32_vm86);
+	PRINT(kvm_asm32_paged_vm86);
+	PRINT(kvm_asm64_vm86);
+	PRINT(kvm_asm64_enable_long);
+	PRINT(kvm_asm64_init_vm);
+	PRINT(kvm_asm64_vm_exit);
+	PRINT(kvm_asm64_cpl3);
+	return 0;
+}