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[Object] Extract Elf_Ehdr. Patch by Hemant Kulkarni!

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163532 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael J. Spencer 2012-09-10 19:04:02 +00:00
parent 6165dba25f
commit 2c38a6615a
2 changed files with 26 additions and 24 deletions
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47
include/llvm/Object/ELF.h
View File

@ -387,11 +387,36 @@ struct Elf_Rel_Impl<target_endianness, false, isRela>
} }
}; };
template<support::endianness target_endianness, bool is64Bits>
struct Elf_Ehdr_Impl {
LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
unsigned char e_ident[ELF::EI_NIDENT]; // ELF Identification bytes
Elf_Half e_type; // Type of file (see ET_*)
Elf_Half e_machine; // Required architecture for this file (see EM_*)
Elf_Word e_version; // Must be equal to 1
Elf_Addr e_entry; // Address to jump to in order to start program
Elf_Off e_phoff; // Program header table's file offset, in bytes
Elf_Off e_shoff; // Section header table's file offset, in bytes
Elf_Word e_flags; // Processor-specific flags
Elf_Half e_ehsize; // Size of ELF header, in bytes
Elf_Half e_phentsize;// Size of an entry in the program header table
Elf_Half e_phnum; // Number of entries in the program header table
Elf_Half e_shentsize;// Size of an entry in the section header table
Elf_Half e_shnum; // Number of entries in the section header table
Elf_Half e_shstrndx; // Section header table index of section name
// string table
bool checkMagic() const {
return (memcmp(e_ident, ELF::ElfMagic, strlen(ELF::ElfMagic))) == 0;
}
unsigned char getFileClass() const { return e_ident[ELF::EI_CLASS]; }
unsigned char getDataEncoding() const { return e_ident[ELF::EI_DATA]; }
};
template<support::endianness target_endianness, bool is64Bits> template<support::endianness target_endianness, bool is64Bits>
class ELFObjectFile : public ObjectFile { class ELFObjectFile : public ObjectFile {
LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits) LLVM_ELF_IMPORT_TYPES(target_endianness, is64Bits)
typedef Elf_Ehdr_Impl<target_endianness, is64Bits> Elf_Ehdr;
typedef Elf_Shdr_Impl<target_endianness, is64Bits> Elf_Shdr; typedef Elf_Shdr_Impl<target_endianness, is64Bits> Elf_Shdr;
typedef Elf_Sym_Impl<target_endianness, is64Bits> Elf_Sym; typedef Elf_Sym_Impl<target_endianness, is64Bits> Elf_Sym;
typedef Elf_Dyn_Impl<target_endianness, is64Bits> Elf_Dyn; typedef Elf_Dyn_Impl<target_endianness, is64Bits> Elf_Dyn;
@ -406,28 +431,6 @@ class ELFObjectFile : public ObjectFile {
typedef content_iterator<DynRef> dyn_iterator; typedef content_iterator<DynRef> dyn_iterator;
protected: protected:
struct Elf_Ehdr {
unsigned char e_ident[ELF::EI_NIDENT]; // ELF Identification bytes
Elf_Half e_type; // Type of file (see ET_*)
Elf_Half e_machine; // Required architecture for this file (see EM_*)
Elf_Word e_version; // Must be equal to 1
Elf_Addr e_entry; // Address to jump to in order to start program
Elf_Off e_phoff; // Program header table's file offset, in bytes
Elf_Off e_shoff; // Section header table's file offset, in bytes
Elf_Word e_flags; // Processor-specific flags
Elf_Half e_ehsize; // Size of ELF header, in bytes
Elf_Half e_phentsize;// Size of an entry in the program header table
Elf_Half e_phnum; // Number of entries in the program header table
Elf_Half e_shentsize;// Size of an entry in the section header table
Elf_Half e_shnum; // Number of entries in the section header table
Elf_Half e_shstrndx; // Section header table index of section name
// string table
bool checkMagic() const {
return (memcmp(e_ident, ELF::ElfMagic, strlen(ELF::ElfMagic))) == 0;
}
unsigned char getFileClass() const { return e_ident[ELF::EI_CLASS]; }
unsigned char getDataEncoding() const { return e_ident[ELF::EI_DATA]; }
};
// This flag is used for classof, to distinguish ELFObjectFile from // This flag is used for classof, to distinguish ELFObjectFile from
// its subclass. If more subclasses will be created, this flag will // its subclass. If more subclasses will be created, this flag will
// have to become an enum. // have to become an enum.

3
lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
View File

@ -36,8 +36,7 @@ class DyldELFObject : public ELFObjectFile<target_endianness, is64Bits> {
typedef Elf_Rel_Impl<target_endianness, is64Bits, false> Elf_Rel; typedef Elf_Rel_Impl<target_endianness, is64Bits, false> Elf_Rel;
typedef Elf_Rel_Impl<target_endianness, is64Bits, true> Elf_Rela; typedef Elf_Rel_Impl<target_endianness, is64Bits, true> Elf_Rela;
typedef typename ELFObjectFile<target_endianness, is64Bits>:: typedef Elf_Ehdr_Impl<target_endianness, is64Bits> Elf_Ehdr;
Elf_Ehdr Elf_Ehdr;
typedef typename ELFDataTypeTypedefHelper< typedef typename ELFDataTypeTypedefHelper<
target_endianness, is64Bits>::value_type addr_type; target_endianness, is64Bits>::value_type addr_type;