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authorIan Lance Taylor <iant@google.com>2006-09-25 21:29:06 +0000
committerIan Lance Taylor <iant@google.com>2006-09-25 21:29:06 +0000
commit39081c14cf1a644187199dcda485025ba01bb8e2 (patch)
tree40f7a905c5917ac0c485f10f3b9fcd57969683f0 /elfcpp
parent3c68c38feb2fb1c965bf3c22da490e773af63b33 (diff)
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Add program segments.
Diffstat (limited to 'elfcpp')
-rw-r--r--elfcpp/elfcpp.h108
-rw-r--r--elfcpp/elfcpp_internal.h33
2 files changed, 128 insertions, 13 deletions
diff --git a/elfcpp/elfcpp.h b/elfcpp/elfcpp.h
index 4f2a4ab..6f8f0dd 100644
--- a/elfcpp/elfcpp.h
+++ b/elfcpp/elfcpp.h
@@ -26,14 +26,7 @@ typedef int64_t Elf_Sxword;
// template parameter should be 32 or 64.
template<int size>
-struct Elf_types
-{
- // Dummy types which should not be used.
- typedef unsigned char Elf_Addr;
- typedef unsigned char Elf_Off;
- // WXword is for fields which are Elf32_Word and Elf64_Xword.
- typedef unsigned char Elf_WXword;
-};
+struct Elf_types;
template<>
struct Elf_types<32>
@@ -49,9 +42,6 @@ struct Elf_types<64>
typedef uint64_t Elf_Addr;
typedef uint64_t Elf_Off;
typedef uint64_t Elf_WXword;
- static const int ehdr_size;
- static const int shdr_size;
- static const int sym_size;
};
// Offsets within the Ehdr e_ident field.
@@ -299,7 +289,7 @@ enum
// The valid values found in the Shdr sh_type field.
-enum
+enum SHT
{
SHT_NULL = 0,
SHT_PROGBITS = 1,
@@ -340,7 +330,7 @@ enum
// The valid bit flags found in the Shdr sh_flags field.
-enum
+enum SHF
{
SHF_WRITE = 0x1,
SHF_ALLOC = 0x2,
@@ -366,6 +356,43 @@ enum
GRP_MASKPROC = 0xf0000000
};
+// The valid values found in the Phdr p_type field.
+
+enum PT
+{
+ PT_NULL = 0,
+ PT_LOAD = 1,
+ PT_DYNAMIC = 2,
+ PT_INTERP = 3,
+ PT_NOTE = 4,
+ PT_SHLIB = 5,
+ PT_PHDR = 6,
+ PT_TLS = 7,
+ PT_LOOS = 0x60000000,
+ PT_HIOS = 0x6fffffff,
+ PT_LOPROC = 0x70000000,
+ PT_HIPROC = 0x7fffffff,
+ // The remaining values are not in the standard.
+ // Frame unwind information.
+ PT_GNU_EH_FRAME = 0x6474e550,
+ PT_SUNW_EH_FRAME = 0x6474e550,
+ // Stack flags.
+ PT_GNU_STACK = 0x6474e551,
+ // Read only after relocation.
+ PT_GNU_RELRO = 0x6474e552
+};
+
+// The valid bit flags found in the Phdr p_flags field.
+
+enum PF
+{
+ PF_X = 0x1,
+ PF_W = 0x2,
+ PF_R = 0x4,
+ PF_MASKOS = 0x0ff00000,
+ PF_MASKPROC = 0xf0000000
+};
+
// Symbol binding from Sym st_info field.
enum STB
@@ -469,6 +496,15 @@ struct Elf_sizes
static const int sym_size = sizeof(internal::Sym_data<size>);
};
+// Given the address of an Elf_Word, return the value.
+
+template<bool big_endian>
+inline Elf_Word
+read_elf_word(const Elf_Word* p)
+{
+ return internal::convert_word<big_endian>(*p);
+}
+
// Accessor class for the ELF file header.
template<int size, bool big_endian>
@@ -594,6 +630,52 @@ class Shdr
const internal::Shdr_data<size>* p_;
};
+// Accessor class for an ELF segment header.
+
+template<int size, bool big_endian>
+class Phdr
+{
+ public:
+ Phdr(const unsigned char* p)
+ : p_(reinterpret_cast<const internal::Phdr_data<size>*>(p))
+ { }
+
+ Elf_Word
+ get_p_type() const
+ { return internal::convert_word<big_endian>(this->p_->p_type); }
+
+ typename Elf_types<size>::Elf_Off
+ get_p_offset() const
+ { return internal::convert_off<size, big_endian>(this->p_->p_offset); }
+
+ typename Elf_types<size>::Elf_Addr
+ get_p_vaddr() const
+ { return internal::convert_addr<size, big_endian>(this->p_->p_vaddr); }
+
+ typename Elf_types<size>::Elf_Addr
+ get_p_paddr() const
+ { return internal::convert_addr<size, big_endian>(this->p_->p_paddr); }
+
+ typename Elf_types<size>::Elf_WXword
+ get_p_filesz() const
+ { return internal::convert_wxword<size, big_endian>(this->p_->p_filesz); }
+
+ typename Elf_types<size>::Elf_WXword
+ get_p_memsz() const
+ { return internal::convert_wxword<size, big_endian>(this->p_->p_memsz); }
+
+ Elf_Word
+ get_p_flags() const
+ { return internal::convert_word<big_endian>(this->p_->p_flags); }
+
+ typename Elf_types<size>::Elf_WXword
+ get_p_align() const
+ { return internal::convert_wxword<size, big_endian>(this->p_->p_align); }
+
+ private:
+ const internal::Phdr_data<size>* p_;
+};
+
// Accessor class for an ELF symbol table entry.
template<int size, bool big_endian>
diff --git a/elfcpp/elfcpp_internal.h b/elfcpp/elfcpp_internal.h
index f4dd8bd..696343a 100644
--- a/elfcpp/elfcpp_internal.h
+++ b/elfcpp/elfcpp_internal.h
@@ -202,6 +202,39 @@ struct Shdr_data
typename Elf_types<size>::Elf_WXword sh_entsize;
};
+// An ELF segment header. We use template specialization for the
+// 32-bit and 64-bit versions because the fields are in a different
+// order.
+
+template<int size>
+struct Phdr_data;
+
+template<>
+struct Phdr_data<32>
+{
+ Elf_Word p_type;
+ Elf_types<32>::Elf_Off p_offset;
+ Elf_types<32>::Elf_Addr p_vaddr;
+ Elf_types<32>::Elf_Addr p_paddr;
+ Elf_Word p_filesz;
+ Elf_Word p_memsz;
+ Elf_Word p_flags;
+ Elf_Word p_align;
+};
+
+template<>
+struct Phdr_data<64>
+{
+ Elf_Word p_type;
+ Elf_Word p_flags;
+ Elf_types<64>::Elf_Off p_offset;
+ Elf_types<64>::Elf_Addr p_vaddr;
+ Elf_types<64>::Elf_Addr p_paddr;
+ Elf_Xword p_filesz;
+ Elf_Xword p_memsz;
+ Elf_Xword p_align;
+};
+
// An ELF symbol table entry. We use template specialization for the
// 32-bit and 64-bit versions because the fields are in a different
// order.