Add support for debugging KASLR kernels via kdp (the kernel being
loaded at a random offset).
To get the kernel's UUID and load address I need to send a kdp
packet so I had to implement the kernel relocation (and attempt to
find the kernel if none was provided to lldb already) in ProcessKDP
-- but this code really properly belongs in DynamicLoaderDarwinKernel.
I also had to add an optional Stream to ConnectRemote so
ProcessKDP::DoConnectRemote can print feedback about the remote kernel's
UUID, load address, and notify the user if we auto-loaded the kernel via
the UUID.
<rdar://problem/7714201>
git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@164881 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/Plugins/Process/MacOSX-Kernel/CommunicationKDP.cpp b/source/Plugins/Process/MacOSX-Kernel/CommunicationKDP.cpp
index c0e6288..7600ab6 100644
--- a/source/Plugins/Process/MacOSX-Kernel/CommunicationKDP.cpp
+++ b/source/Plugins/Process/MacOSX-Kernel/CommunicationKDP.cpp
@@ -11,6 +11,7 @@
#include "CommunicationKDP.h"
// C Includes
+#include <errno.h>
#include <limits.h>
#include <string.h>
@@ -22,6 +23,7 @@
#include "lldb/Core/DataExtractor.h"
#include "lldb/Core/Log.h"
#include "lldb/Core/State.h"
+#include "lldb/Core/UUID.h"
#include "lldb/Host/FileSpec.h"
#include "lldb/Host/Host.h"
#include "lldb/Host/TimeValue.h"
@@ -499,6 +501,51 @@
return m_kdp_hostinfo_cpu_subtype;
}
+lldb_private::UUID
+CommunicationKDP::GetUUID ()
+{
+ UUID uuid;
+ if (GetKernelVersion() == NULL)
+ return uuid;
+
+ if (m_kernel_version.find("UUID=") == std::string::npos)
+ return uuid;
+
+ size_t p = m_kernel_version.find("UUID=") + strlen ("UUID=");
+ std::string uuid_str = m_kernel_version.substr(p, 36);
+ if (uuid_str.size() < 32)
+ return uuid;
+
+ if (uuid.SetFromCString (uuid_str.c_str()) == 0)
+ {
+ UUID invalid_uuid;
+ return invalid_uuid;
+ }
+
+ return uuid;
+}
+
+lldb::addr_t
+CommunicationKDP::GetLoadAddress ()
+{
+ if (GetKernelVersion() == NULL)
+ return LLDB_INVALID_ADDRESS;
+
+ if (m_kernel_version.find("stext=") == std::string::npos)
+ return LLDB_INVALID_ADDRESS;
+ size_t p = m_kernel_version.find("stext=") + strlen ("stext=");
+ if (m_kernel_version[p] != '0' || m_kernel_version[p + 1] != 'x')
+ return LLDB_INVALID_ADDRESS;
+
+ addr_t kernel_load_address;
+ errno = 0;
+ kernel_load_address = ::strtoul (m_kernel_version.c_str() + p, NULL, 16);
+ if (errno != 0 || kernel_load_address == 0)
+ return LLDB_INVALID_ADDRESS;
+
+ return kernel_load_address;
+}
+
bool
CommunicationKDP::SendRequestHostInfo ()
{