[lld] r245880 - Add support for reading files with more than 0xff00 sections.
Rafael Espindola via llvm-commits
llvm-commits at lists.llvm.org
Mon Aug 24 14:43:25 PDT 2015
Author: rafael
Date: Mon Aug 24 16:43:25 2015
New Revision: 245880
URL: http://llvm.org/viewvc/llvm-project?rev=245880&view=rev
Log:
Add support for reading files with more than 0xff00 sections.
Added:
lld/trunk/test/elf2/many-sections.s
Modified:
lld/trunk/ELF/InputFiles.cpp
lld/trunk/ELF/InputFiles.h
Modified: lld/trunk/ELF/InputFiles.cpp
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/ELF/InputFiles.cpp?rev=245880&r1=245879&r2=245880&view=diff
==============================================================================
--- lld/trunk/ELF/InputFiles.cpp (original)
+++ lld/trunk/ELF/InputFiles.cpp Mon Aug 24 16:43:25 2015
@@ -46,6 +46,12 @@ template <class ELFT> void elf2::ObjectF
case SHT_SYMTAB:
Symtab = &Sec;
break;
+ case SHT_SYMTAB_SHNDX: {
+ ErrorOr<ArrayRef<Elf_Word>> ErrorOrTable = ELFObj->getSHNDXTable(Sec);
+ error(ErrorOrTable);
+ SymtabSHNDX = *ErrorOrTable;
+ break;
+ }
case SHT_STRTAB:
case SHT_NULL:
case SHT_RELA:
@@ -82,7 +88,11 @@ SymbolBody *elf2::ObjectFile<ELFT>::crea
ErrorOr<StringRef> NameOrErr = Sym->getName(StringTable);
error(NameOrErr.getError());
StringRef Name = *NameOrErr;
- uint16_t SecIndex = Sym->st_shndx;
+
+ uint32_t SecIndex = Sym->st_shndx;
+ if (SecIndex == SHN_XINDEX)
+ SecIndex = ELFObj->getExtendedSymbolTableIndex(Sym, Symtab, SymtabSHNDX);
+
switch (Sym->getBinding()) {
default:
error("unexpected binding");
Modified: lld/trunk/ELF/InputFiles.h
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/ELF/InputFiles.h?rev=245880&r1=245879&r2=245880&view=diff
==============================================================================
--- lld/trunk/ELF/InputFiles.h (original)
+++ lld/trunk/ELF/InputFiles.h Mon Aug 24 16:43:25 2015
@@ -65,6 +65,7 @@ template <class ELFT> class ObjectFile :
typedef typename llvm::object::ELFFile<ELFT>::Elf_Sym Elf_Sym;
typedef typename llvm::object::ELFFile<ELFT>::Elf_Shdr Elf_Shdr;
typedef typename llvm::object::ELFFile<ELFT>::Elf_Sym_Range Elf_Sym_Range;
+ typedef typename llvm::object::ELFFile<ELFT>::Elf_Word Elf_Word;
public:
bool isCompatibleWith(const ObjectFileBase &Other) const override;
@@ -102,6 +103,7 @@ private:
std::vector<SectionChunk<ELFT> *> Chunks;
const Elf_Shdr *Symtab = nullptr;
+ ArrayRef<Elf_Word> SymtabSHNDX;
};
} // namespace elf2
Added: lld/trunk/test/elf2/many-sections.s
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/test/elf2/many-sections.s?rev=245880&view=auto
==============================================================================
--- lld/trunk/test/elf2/many-sections.s (added)
+++ lld/trunk/test/elf2/many-sections.s Mon Aug 24 16:43:25 2015
@@ -0,0 +1,113 @@
+// RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux-gnu %s -o %t
+// RUN: llvm-readobj -t %t | FileCheck --check-prefix=LINKED %s
+
+// Verify that the symbol _start is in a section with an index >= SHN_LORESERVE.
+// CHECK: Name: _start
+// CHECK-NEXT: Value: 0x0
+// CHECK-NEXT: Size: 0
+// CHECK-NEXT: Binding: Global
+// CHECK-NEXT: Type: None
+// CHECK-NEXT: Other: 0
+// CHECK-NEXT: Section: dm (0xFF00)
+
+
+// RUN: lld -flavor gnu2 %t -o %t2
+// RUN: llvm-readobj -t %t2 | FileCheck --check-prefix=LINKED %s
+
+// Test that _start is in the correct section.
+// LINKED: Name: _start
+// LINKED-NEXT: Value: 0x0
+// LINKED-NEXT: Size: 0
+// LINKED-NEXT: Binding: Global
+// LINKED-NEXT: Type: None
+// LINKED-NEXT: Other: 0
+// LINKED-NEXT: Section: dm
+
+.macro gen_sections4 x
+ .section a\x
+ .section b\x
+ .section c\x
+ .section d\x
+.endm
+
+.macro gen_sections8 x
+ gen_sections4 a\x
+ gen_sections4 b\x
+.endm
+
+.macro gen_sections16 x
+ gen_sections8 a\x
+ gen_sections8 b\x
+.endm
+
+.macro gen_sections32 x
+ gen_sections16 a\x
+ gen_sections16 b\x
+.endm
+
+.macro gen_sections64 x
+ gen_sections32 a\x
+ gen_sections32 b\x
+.endm
+
+.macro gen_sections128 x
+ gen_sections64 a\x
+ gen_sections64 b\x
+.endm
+
+.macro gen_sections256 x
+ gen_sections128 a\x
+ gen_sections128 b\x
+.endm
+
+.macro gen_sections512 x
+ gen_sections256 a\x
+ gen_sections256 b\x
+.endm
+
+.macro gen_sections1024 x
+ gen_sections512 a\x
+ gen_sections512 b\x
+.endm
+
+.macro gen_sections2048 x
+ gen_sections1024 a\x
+ gen_sections1024 b\x
+.endm
+
+.macro gen_sections4096 x
+ gen_sections2048 a\x
+ gen_sections2048 b\x
+.endm
+
+.macro gen_sections8192 x
+ gen_sections4096 a\x
+ gen_sections4096 b\x
+.endm
+
+.macro gen_sections16384 x
+ gen_sections8192 a\x
+ gen_sections8192 b\x
+.endm
+
+.macro gen_sections32768 x
+ gen_sections16384 a\x
+ gen_sections16384 b\x
+.endm
+
+gen_sections32768 a
+gen_sections16384 b
+gen_sections8192 c
+gen_sections4096 d
+gen_sections2048 e
+gen_sections1024 f
+gen_sections512 g
+gen_sections128 h
+gen_sections64 i
+gen_sections32 j
+gen_sections16 k
+gen_sections8 l
+gen_sections4 m
+
+.global _start
+_start:
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