[Lldb-commits] [lldb] r354258 - PECOFF: Implement GetBaseAddress
Pavel Labath via lldb-commits
lldb-commits at lists.llvm.org
Mon Feb 18 03:06:58 PST 2019
Author: labath
Date: Mon Feb 18 03:06:57 2019
New Revision: 354258
URL: http://llvm.org/viewvc/llvm-project?rev=354258&view=rev
Log:
PECOFF: Implement GetBaseAddress
COFF files are modelled in lldb as having one big container section
spanning the entire module image, with the actual sections being
subsections of that. In this model, the base address is simply the
address of the first byte of that section.
This also removes the hack where ObjectFilePECOFF was using the
m_file_offset field to communicate this information. Using file offset
for this purpose is completely wrong, as that is supposed to indicate
where is this ObjectFile located in the file on disk. This field is only
meaningful for fat binaries, and should normally be 0.
Both PDB plugins have been updated to use GetBaseAddress instead of
GetFileOffset.
Added:
lldb/trunk/lit/Modules/PECOFF/basic-info.yaml
Modified:
lldb/trunk/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp
lldb/trunk/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.h
lldb/trunk/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.cpp
lldb/trunk/source/Plugins/SymbolFile/PDB/SymbolFilePDB.cpp
Added: lldb/trunk/lit/Modules/PECOFF/basic-info.yaml
URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/lit/Modules/PECOFF/basic-info.yaml?rev=354258&view=auto
==============================================================================
--- lldb/trunk/lit/Modules/PECOFF/basic-info.yaml (added)
+++ lldb/trunk/lit/Modules/PECOFF/basic-info.yaml Mon Feb 18 03:06:57 2019
@@ -0,0 +1,86 @@
+# RUN: yaml2obj %s > %t
+# RUN: lldb-test object-file %t | FileCheck %s
+
+# CHECK: Plugin name: pe-coff
+# CHECK: Architecture: x86_64-pc-windows-msvc
+# CHECK: UUID:
+# CHECK: Executable: true
+# CHECK: Stripped: false
+# CHECK: Type: executable
+# CHECK: Strata: user
+# CHECK: Base VM address: 0x47000
+
+--- !COFF
+OptionalHeader:
+ AddressOfEntryPoint: 4096
+ ImageBase: 290816
+ SectionAlignment: 4096
+ FileAlignment: 512
+ MajorOperatingSystemVersion: 6
+ MinorOperatingSystemVersion: 0
+ MajorImageVersion: 0
+ MinorImageVersion: 0
+ MajorSubsystemVersion: 6
+ MinorSubsystemVersion: 0
+ Subsystem: IMAGE_SUBSYSTEM_WINDOWS_CUI
+ DLLCharacteristics: [ IMAGE_DLL_CHARACTERISTICS_HIGH_ENTROPY_VA, IMAGE_DLL_CHARACTERISTICS_DYNAMIC_BASE, IMAGE_DLL_CHARACTERISTICS_NX_COMPAT, IMAGE_DLL_CHARACTERISTICS_TERMINAL_SERVER_AWARE ]
+ SizeOfStackReserve: 1048576
+ SizeOfStackCommit: 4096
+ SizeOfHeapReserve: 1048576
+ SizeOfHeapCommit: 4096
+ ExportTable:
+ RelativeVirtualAddress: 0
+ Size: 0
+ ImportTable:
+ RelativeVirtualAddress: 0
+ Size: 0
+ ResourceTable:
+ RelativeVirtualAddress: 0
+ Size: 0
+ ExceptionTable:
+ RelativeVirtualAddress: 0
+ Size: 0
+ CertificateTable:
+ RelativeVirtualAddress: 0
+ Size: 0
+ BaseRelocationTable:
+ RelativeVirtualAddress: 0
+ Size: 0
+ Debug:
+ RelativeVirtualAddress: 0
+ Size: 0
+ Architecture:
+ RelativeVirtualAddress: 0
+ Size: 0
+ GlobalPtr:
+ RelativeVirtualAddress: 0
+ Size: 0
+ TlsTable:
+ RelativeVirtualAddress: 0
+ Size: 0
+ LoadConfigTable:
+ RelativeVirtualAddress: 0
+ Size: 0
+ BoundImport:
+ RelativeVirtualAddress: 0
+ Size: 0
+ IAT:
+ RelativeVirtualAddress: 0
+ Size: 0
+ DelayImportDescriptor:
+ RelativeVirtualAddress: 0
+ Size: 0
+ ClrRuntimeHeader:
+ RelativeVirtualAddress: 0
+ Size: 0
+header:
+ Machine: IMAGE_FILE_MACHINE_AMD64
+ Characteristics: [ IMAGE_FILE_EXECUTABLE_IMAGE, IMAGE_FILE_LARGE_ADDRESS_AWARE ]
+sections:
+ - Name: .text
+ Characteristics: [ IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ ]
+ VirtualAddress: 4096
+ VirtualSize: 1
+ SectionData: C3
+symbols: []
+...
Modified: lldb/trunk/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp
URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp?rev=354258&r1=354257&r2=354258&view=diff
==============================================================================
--- lldb/trunk/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp (original)
+++ lldb/trunk/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp Mon Feb 18 03:06:57 2019
@@ -457,7 +457,6 @@ bool ObjectFilePECOFF::ParseCOFFOptional
m_coff_header_opt.data_dirs[i].vmsize = m_data.GetU32(offset_ptr);
}
- m_file_offset = m_coff_header_opt.image_base;
m_image_base = m_coff_header_opt.image_base;
}
}
@@ -927,6 +926,10 @@ lldb_private::Address ObjectFilePECOFF::
return m_entry_point_address;
}
+Address ObjectFilePECOFF::GetBaseAddress() {
+ return Address(GetSectionList()->GetSectionAtIndex(0), 0);
+}
+
//----------------------------------------------------------------------
// Dump
//
Modified: lldb/trunk/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.h
URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.h?rev=354258&r1=354257&r2=354258&view=diff
==============================================================================
--- lldb/trunk/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.h (original)
+++ lldb/trunk/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.h Mon Feb 18 03:06:57 2019
@@ -117,6 +117,8 @@ public:
virtual lldb_private::Address GetEntryPointAddress() override;
+ lldb_private::Address GetBaseAddress() override;
+
ObjectFile::Type CalculateType() override;
ObjectFile::Strata CalculateStrata() override;
Modified: lldb/trunk/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.cpp
URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.cpp?rev=354258&r1=354257&r2=354258&view=diff
==============================================================================
--- lldb/trunk/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.cpp (original)
+++ lldb/trunk/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.cpp Mon Feb 18 03:06:57 2019
@@ -315,7 +315,7 @@ uint32_t SymbolFileNativePDB::CalculateA
}
void SymbolFileNativePDB::InitializeObject() {
- m_obj_load_address = m_obj_file->GetFileOffset();
+ m_obj_load_address = m_obj_file->GetBaseAddress().GetFileAddress();
m_index->SetLoadAddress(m_obj_load_address);
m_index->ParseSectionContribs();
Modified: lldb/trunk/source/Plugins/SymbolFile/PDB/SymbolFilePDB.cpp
URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/source/Plugins/SymbolFile/PDB/SymbolFilePDB.cpp?rev=354258&r1=354257&r2=354258&view=diff
==============================================================================
--- lldb/trunk/source/Plugins/SymbolFile/PDB/SymbolFilePDB.cpp (original)
+++ lldb/trunk/source/Plugins/SymbolFile/PDB/SymbolFilePDB.cpp Mon Feb 18 03:06:57 2019
@@ -181,7 +181,7 @@ uint32_t SymbolFilePDB::CalculateAbiliti
}
void SymbolFilePDB::InitializeObject() {
- lldb::addr_t obj_load_address = m_obj_file->GetFileOffset();
+ lldb::addr_t obj_load_address = m_obj_file->GetBaseAddress().GetFileAddress();
lldbassert(obj_load_address && obj_load_address != LLDB_INVALID_ADDRESS);
m_session_up->setLoadAddress(obj_load_address);
if (!m_global_scope_up)
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