================
@@ -0,0 +1,770 @@
+#include "lldb/Breakpoint/StoppointCallbackContext.h"
+#include "lldb/Core/Debugger.h"
+#include "lldb/Core/Module.h"
+#include "lldb/Core/ModuleSpec.h"
+#include "lldb/Core/PluginManager.h"
+#include "lldb/Core/Section.h"
+#include "lldb/Core/StreamFile.h"
+#include "lldb/Interpreter/OptionValueProperties.h"
+#include "lldb/Symbol/LocateSymbolFile.h"
+#include "lldb/Symbol/ObjectFile.h"
+#include "lldb/Target/OperatingSystem.h"
+#include "lldb/Target/RegisterContext.h"
+#include "lldb/Target/StackFrame.h"
+#include "lldb/Target/Target.h"
+#include "lldb/Target/Thread.h"
+#include "lldb/Target/ThreadPlanRunToAddress.h"
+#include "lldb/Utility/DataBuffer.h"
+#include "lldb/Utility/DataBufferHeap.h"
+#include "lldb/Utility/LLDBLog.h"
+#include "lldb/Utility/Log.h"
+#include "lldb/Utility/State.h"
+
+#include "Plugins/ObjectFile/ELF/ObjectFileELF.h"
+
+#include "DynamicLoaderFreeBSDKernel.h"
+#include <memory>
+#include <mutex>
+
+using namespace lldb;
+using namespace lldb_private;
+
+LLDB_PLUGIN_DEFINE(DynamicLoaderFreeBSDKernel)
+
+void DynamicLoaderFreeBSDKernel::Initialize() {
+ PluginManager::RegisterPlugin(GetPluginNameStatic(),
+ GetPluginDescriptionStatic(), CreateInstance,
+ DebuggerInit);
+}
+
+void DynamicLoaderFreeBSDKernel::Terminate() {
+ PluginManager::UnregisterPlugin(CreateInstance);
+}
+
+llvm::StringRef DynamicLoaderFreeBSDKernel::GetPluginDescriptionStatic() {
+ return "The Dynamic Loader Plugin For FreeBSD Kernel";
+}
+
+static bool is_kernel(Module *module) {
+ if (!module)
+ return false;
+
+ ObjectFile *objfile = module->GetObjectFile();
+ if (!objfile)
+ return false;
+ if (objfile->GetType() != ObjectFile::eTypeExecutable)
+ return false;
+ if (objfile->GetStrata() != ObjectFile::eStrataUnknown &&
+ objfile->GetStrata() != ObjectFile::eStrataUser)
----------------
emaste wrote:
We can identify a FreeBSD kernel by the bogus PT_INTERP it specifies:
```
INTERP 0x000238 0xffffffff80200238 0x0000000000200238 0x00000d
0x00000d R 0x1
[Requesting program interpreter: /red/herring]
```
There are a bunch of ELF notes, but nothing that would uniquely identify it as
a FreeBSD kernel. I suspect the Xen notes are unique to kernels, but won't be
present if built without Xen support I guess. (As an aside I guess we should
teach llvm-readelf about those note types.)
```
Displaying notes found in: .note.gnu.build-id
Owner Data size Description
GNU 0x00000014 NT_GNU_BUILD_ID (unique build ID
bitstring)
Build ID: 984b7de7a87159b85761dc6bdc9645e28407e890
Displaying notes found in: .note.Xen
Owner Data size Description
Xen 0x00000008 Unknown note type: (0x00000006)
description data: 46 72 65 65 42 53 44 00
Xen 0x00000009 Unknown note type: (0x00000007)
description data: 30 78 31 33 64 36 37 37 00
Xen 0x00000008 Unknown note type: (0x00000005)
description data: 78 65 6e 2d 33 2e 30 00
Xen 0x00000008 Unknown note type: (0x00000003)
description data: 00 00 00 80 ff ff ff ff
Xen 0x00000008 Unknown note type: (0x00000004)
description data: 00 00 00 00 00 00 00 00
Xen 0x00000008 NT_VERSION (version)
description data: 00 b0 03 81 ff ff ff ff
Xen 0x00000008 NT_ARCH (architecture)
description data: 00 a0 03 81 ff ff ff ff
Xen 0x00000008 Unknown note type: (0x0000000c)
description data: 00 00 00 00 00 80 ff ff
Xen 0x0000005e Unknown note type: (0x0000000a)
description data: 77 72 69 74 61 62 6c 65 5f 64 65 73 63 72 69 70 74 6f 72
5f 74 61 62 6c 65 73 7c 61 75 74 6f 5f 74 72 61 6e 73 6c 61 74 65 64 5f 70 68
79 73 6d 61 70 7c 73 75 70 65 72 76 69 73 6f 72 5f 6d 6f 64 65 5f 6b 65 72 6e
65 6c 7c 68 76 6d 5f 63 61 6c 6c 62 61 63 6b 5f 76 65 63 74 6f 72 00
Xen 0x00000004 Unknown note type: (0x00000009)
description data: 79 65 73 00
Xen 0x00000008 Unknown note type: (0x0000000d)
description data: 01 00 00 00 01 00 00 00
Xen 0x00000008 Unknown note type: (0x00000008)
description data: 67 65 6e 65 72 69 63 00
Xen 0x00000004 Unknown note type: (0x0000000e)
description data: 00 00 00 00
Xen 0x00000004 Unknown note type: (0x0000000b)
description data: 79 65 73 00
Xen 0x00000004 Unknown note type: (0x00000012)
description data: 30 b0 03 01
```
Oh, I guess a section named `set_sysinit_set` could be a decent indication.
```
There are 61 section headers, starting at offset 0x19a0c38:
Section Headers:
[Nr] Name Type Address Off Size ES Flg
Lk Inf Al
[ 0] NULL 0000000000000000 000000 000000 00
0 0 0
[ 1] .interp PROGBITS ffffffff802002a8 0002a8 00000d 00 A
0 0 1
[ 2] .hash HASH ffffffff802002b8 0002b8 02dc10 04 A
4 0 4
...
[49] set_sysinit_set PROGBITS ffffffff81746070 1546070 003878 00 WA
0 0 8
```
There are a bunch of `set_*_set` sections but the SYSINT linker set is always
going to be present.
https://github.com/llvm/llvm-project/pull/67106
_______________________________________________
lldb-commits mailing list
lldb-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-commits
