mstorsjo created this revision.
mstorsjo added reviewers: labath, amccarth.
Herald added a subscriber: JDevlieghere.
Herald added a project: LLDB.
The virtual container/header section causes the section list to be offset by
one. Previously, symbols in the first section were given addresses in the COFF
header section.
This depends on D69100 <https://reviews.llvm.org/D69100>; before that, one has
to access the subsections differently.
The testcase uses `lldb-test symbols`, but doesn't really use any SymbolFile
functionality, but just tries to inspect what the ObjectFile plugin provides in
the symbol table, hence the testcase is in Shell/ObjectFile/PECOFF.
Repository:
rLLDB LLDB
https://reviews.llvm.org/D69366
Files:
lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp
lldb/test/Shell/ObjectFile/PECOFF/symbol.yaml
Index: lldb/test/Shell/ObjectFile/PECOFF/symbol.yaml
===================================================================
--- /dev/null
+++ lldb/test/Shell/ObjectFile/PECOFF/symbol.yaml
@@ -0,0 +1,91 @@
+# RUN: yaml2obj %s > %t
+# RUN: lldb-test symbols %t | FileCheck %s
+
+# CHECK: Code 0x0000000040001000 0x{{[0-9a-f]+}} 0x{{[0-9a-f]+}} main
+
+--- !COFF
+OptionalHeader:
+ AddressOfEntryPoint: 4096
+ ImageBase: 1073741824
+ 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:
+ - Name: .text
+ Value: 0
+ SectionNumber: 1
+ SimpleType: IMAGE_SYM_TYPE_NULL
+ ComplexType: IMAGE_SYM_DTYPE_NULL
+ StorageClass: IMAGE_SYM_CLASS_STATIC
+ - Name: main
+ Value: 0
+ SectionNumber: 1
+ SimpleType: IMAGE_SYM_TYPE_NULL
+ ComplexType: IMAGE_SYM_DTYPE_FUNCTION
+ StorageClass: IMAGE_SYM_CLASS_EXTERNAL
+...
Index: lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp
===================================================================
--- lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp
+++ lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp
@@ -685,7 +685,10 @@
symbol.naux = symtab_data.GetU8(&offset);
symbols[i].GetMangled().SetValue(ConstString(symbol_name.c_str()));
if ((int16_t)symbol.sect >= 1) {
- Address symbol_addr(sect_list->GetSectionAtIndex(symbol.sect - 1),
+ // symbol.sect is indexed starting from 1, but our section
+ // list contains one extra synthetic section at the start,
+ // so we should use section index "symbol.sect - 1 + 1".
+ Address symbol_addr(sect_list->GetSectionAtIndex(symbol.sect),
symbol.value);
symbols[i].GetAddressRef() = symbol_addr;
symbols[i].SetType(MapSymbolType(symbol.type));
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