[lld] r242427 - COFF: Set Load Configuration entry in Data Directory.
Rui Ueyama
ruiu at google.com
Thu Jul 16 11:30:35 PDT 2015
Author: ruiu
Date: Thu Jul 16 13:30:35 2015
New Revision: 242427
URL: http://llvm.org/viewvc/llvm-project?rev=242427&view=rev
Log:
COFF: Set Load Configuration entry in Data Directory.
Load Configuration field points to a structure containing information
for SEH. That data strucutre is not created by the linker but provided
by an external file. What we have to do is just to set __load_config_used
address to the header.
Added:
lld/trunk/test/COFF/loadcfg32.test
Modified:
lld/trunk/COFF/Writer.cpp
Modified: lld/trunk/COFF/Writer.cpp
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/COFF/Writer.cpp?rev=242427&r1=242426&r2=242427&view=diff
==============================================================================
--- lld/trunk/COFF/Writer.cpp (original)
+++ lld/trunk/COFF/Writer.cpp Thu Jul 16 13:30:35 2015
@@ -485,6 +485,12 @@ template <typename PEHeaderTy> void Writ
Dir[TLS_TABLE].Size = 40;
}
}
+ if (Symbol *Sym = Symtab->find("__load_config_used")) {
+ if (Defined *B = dyn_cast<Defined>(Sym->Body)) {
+ Dir[LOAD_CONFIG_TABLE].RelativeVirtualAddress = B->getRVA();
+ Dir[LOAD_CONFIG_TABLE].Size = 64;
+ }
+ }
// Write section table
for (OutputSection *Sec : OutputSections) {
Added: lld/trunk/test/COFF/loadcfg32.test
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/test/COFF/loadcfg32.test?rev=242427&view=auto
==============================================================================
--- lld/trunk/test/COFF/loadcfg32.test (added)
+++ lld/trunk/test/COFF/loadcfg32.test Thu Jul 16 13:30:35 2015
@@ -0,0 +1,42 @@
+# RUN: yaml2obj < %s > %t.obj
+# RUN: lld -flavor link2 /out:%t.exe %t.obj /entry:main /subsystem:console
+# RUN: llvm-readobj -file-headers %t.exe | FileCheck %s
+
+# CHECK: LoadConfigTableRVA: 0x1000
+# CHECK: LoadConfigTableSize: 0x40
+
+---
+header:
+ Machine: IMAGE_FILE_MACHINE_I386
+ Characteristics: []
+sections:
+ - Name: .text
+ Characteristics: [ IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ ]
+ Alignment: 4
+ SectionData: B82A000000C3
+symbols:
+ - Name: .text
+ Value: 0
+ SectionNumber: 1
+ SimpleType: IMAGE_SYM_TYPE_NULL
+ ComplexType: IMAGE_SYM_DTYPE_NULL
+ StorageClass: IMAGE_SYM_CLASS_STATIC
+ SectionDefinition:
+ Length: 6
+ NumberOfRelocations: 0
+ NumberOfLinenumbers: 0
+ CheckSum: 0
+ Number: 0
+ - Name: _main
+ Value: 0
+ SectionNumber: 1
+ SimpleType: IMAGE_SYM_TYPE_NULL
+ ComplexType: IMAGE_SYM_DTYPE_NULL
+ StorageClass: IMAGE_SYM_CLASS_EXTERNAL
+ - Name: __load_config_used
+ Value: 0
+ SectionNumber: 1
+ SimpleType: IMAGE_SYM_TYPE_NULL
+ ComplexType: IMAGE_SYM_DTYPE_NULL
+ StorageClass: IMAGE_SYM_CLASS_EXTERNAL
+...
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