c14a34a65f
loader): it now supports holes between segments, and accepts any segment order. * Renamed elf.c to elf.cpp and fixed warnings. * Renamed elf_image_info::dynamic_ptr and eheader to dynamic_section and elf_header. * Some cleanup. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16878 a95241bf-73f2-0310-859d-f6bbb57e9c96
313 lines
5.6 KiB
C
313 lines
5.6 KiB
C
/*
|
|
* Copyright 2002-2006, Haiku Inc. All Rights Reserved.
|
|
* Distributed under the terms of the MIT license.
|
|
*
|
|
* Copyright 2001, Travis Geiselbrecht. All rights reserved.
|
|
* Distributed under the terms of the NewOS License.
|
|
*/
|
|
#ifndef _ELF32_H
|
|
#define _ELF32_H
|
|
|
|
|
|
#include <SupportDefs.h>
|
|
#include <ByteOrder.h>
|
|
|
|
#include <arch/elf.h>
|
|
|
|
|
|
typedef uint32 Elf32_Addr;
|
|
typedef uint16 Elf32_Half;
|
|
typedef uint32 Elf32_Off;
|
|
typedef int32 Elf32_Sword;
|
|
typedef uint32 Elf32_Word;
|
|
|
|
|
|
/*** ELF header ***/
|
|
|
|
#define EI_NIDENT 16
|
|
|
|
struct Elf32_Ehdr {
|
|
uint8 e_ident[EI_NIDENT];
|
|
Elf32_Half e_type;
|
|
Elf32_Half e_machine;
|
|
Elf32_Word e_version;
|
|
Elf32_Addr e_entry;
|
|
Elf32_Off e_phoff;
|
|
Elf32_Off e_shoff;
|
|
Elf32_Word e_flags;
|
|
Elf32_Half e_ehsize;
|
|
Elf32_Half e_phentsize;
|
|
Elf32_Half e_phnum;
|
|
Elf32_Half e_shentsize;
|
|
Elf32_Half e_shnum;
|
|
Elf32_Half e_shstrndx;
|
|
|
|
#ifdef __cplusplus
|
|
bool IsHostEndian() const;
|
|
#endif
|
|
};
|
|
|
|
#define ELF_MAGIC "\x7f""ELF"
|
|
|
|
// e_ident[] indices
|
|
#define EI_MAG0 0
|
|
#define EI_MAG1 1
|
|
#define EI_MAG2 2
|
|
#define EI_MAG3 3
|
|
#define EI_CLASS 4
|
|
#define EI_DATA 5
|
|
#define EI_VERSION 6
|
|
#define EI_PAD 7
|
|
|
|
// architecture class (EI_CLASS)
|
|
#define ELFCLASS32 1
|
|
#define ELFCLASS64 2
|
|
// endian (EI_DATA)
|
|
#define ELFDATA2LSB 1 // little endian
|
|
#define ELFDATA2MSB 2 // big endian
|
|
|
|
|
|
/*** section header ***/
|
|
|
|
struct Elf32_Shdr {
|
|
Elf32_Word sh_name;
|
|
Elf32_Word sh_type;
|
|
Elf32_Word sh_flags;
|
|
Elf32_Addr sh_addr;
|
|
Elf32_Off sh_offset;
|
|
Elf32_Word sh_size;
|
|
Elf32_Word sh_link;
|
|
Elf32_Word sh_info;
|
|
Elf32_Word sh_addralign;
|
|
Elf32_Word sh_entsize;
|
|
};
|
|
|
|
// special section indices
|
|
#define SHN_UNDEF 0
|
|
#define SHN_LORESERVE 0xff00
|
|
#define SHN_LOPROC 0xff00
|
|
#define SHN_HIPROC 0xff1f
|
|
#define SHN_ABS 0xfff1
|
|
#define SHN_COMMON 0xfff2
|
|
#define SHN_HIRESERVE 0xffff
|
|
|
|
// section header type
|
|
#define SHT_NULL 0
|
|
#define SHT_PROGBITS 1
|
|
#define SHT_SYMTAB 2
|
|
#define SHT_STRTAB 3
|
|
#define SHT_RELA 4
|
|
#define SHT_HASH 5
|
|
#define SHT_DYNAMIC 6
|
|
#define SHT_NOTE 7
|
|
#define SHT_NOBITS 8
|
|
#define SHT_REL 9
|
|
#define SHT_SHLIB 10
|
|
#define SHT_DYNSYM 11
|
|
|
|
#define SHT_LOPROC 0x70000000
|
|
#define SHT_HIPROC 0x7fffffff
|
|
#define SHT_LOUSER 0x80000000
|
|
#define SHT_HIUSER 0xffffffff
|
|
|
|
// section header flags
|
|
#define SHF_WRITE 1
|
|
#define SHF_ALLOC 2
|
|
#define SHF_EXECINSTR 4
|
|
|
|
#define SHF_MASKPROC 0xf0000000
|
|
|
|
|
|
/*** program header ***/
|
|
|
|
struct Elf32_Phdr {
|
|
Elf32_Word p_type;
|
|
Elf32_Off p_offset; /* offset from the beginning of the file of the segment */
|
|
Elf32_Addr p_vaddr; /* virtual address for the segment in memory */
|
|
Elf32_Addr p_paddr;
|
|
Elf32_Word p_filesz; /* the size of the segment in the file */
|
|
Elf32_Word p_memsz; /* the size of the segment in memory */
|
|
Elf32_Word p_flags;
|
|
Elf32_Word p_align;
|
|
|
|
#ifdef __cplusplus
|
|
bool IsReadWrite() const;
|
|
bool IsExecutable() const;
|
|
#endif
|
|
};
|
|
|
|
// program header segment types
|
|
#define PT_NULL 0
|
|
#define PT_LOAD 1
|
|
#define PT_DYNAMIC 2
|
|
#define PT_INTERP 3
|
|
#define PT_NOTE 4
|
|
#define PT_SHLIB 5
|
|
#define PT_PHDR 6
|
|
|
|
#define PT_LOPROC 0x70000000
|
|
#define PT_HIPROC 0x7fffffff
|
|
|
|
// program header segment flags
|
|
#define PF_EXECUTE 0x1
|
|
#define PF_WRITE 0x2
|
|
#define PF_READ 0x4
|
|
#define PF_PROTECTION_MASK (PF_EXECUTE | PF_WRITE | PF_READ)
|
|
|
|
#define PF_MASKPROC 0xf0000000
|
|
|
|
struct Elf32_Sym {
|
|
Elf32_Word st_name;
|
|
Elf32_Addr st_value;
|
|
Elf32_Word st_size;
|
|
uint8 st_info;
|
|
uint8 st_other;
|
|
Elf32_Half st_shndx;
|
|
|
|
#ifdef __cplusplus
|
|
uint8 Bind() const;
|
|
uint8 Type() const;
|
|
#endif
|
|
};
|
|
|
|
#define ELF32_ST_BIND(i) ((i) >> 4)
|
|
#define ELF32_ST_TYPE(i) ((i) & 0xf)
|
|
#define ELF32_ST_INFO(b, t) (((b) << 4) + ((t) & 0xf))
|
|
|
|
#define STT_NOTYPE 0
|
|
#define STT_OBJECT 1
|
|
#define STT_FUNC 2
|
|
#define STT_SECTION 3
|
|
#define STT_FILE 4
|
|
#define STT_LOPROC 13
|
|
#define STT_HIPROC 15
|
|
|
|
#define STB_LOCAL 0
|
|
#define STB_GLOBAL 1
|
|
#define STB_WEAK 2
|
|
#define STB_LOPROC 13
|
|
#define STB_HIPROC 15
|
|
|
|
#define STN_UNDEF 0
|
|
|
|
struct Elf32_Rel {
|
|
Elf32_Addr r_offset;
|
|
Elf32_Word r_info;
|
|
|
|
#ifdef __cplusplus
|
|
uint8 SymbolIndex() const;
|
|
uint8 Type() const;
|
|
#endif
|
|
};
|
|
|
|
#ifdef __cplusplus
|
|
struct Elf32_Rela : public Elf32_Rel {
|
|
#else
|
|
struct Elf32_Rela {
|
|
Elf32_Addr r_offset;
|
|
Elf32_Word r_info;
|
|
#endif
|
|
Elf32_Sword r_addend;
|
|
};
|
|
|
|
#define ELF32_R_SYM(i) ((i) >> 8)
|
|
#define ELF32_R_TYPE(i) ((unsigned char)(i))
|
|
#define ELF32_R_INFO(s, t) (((s) << 8) + (unsigned char)(t))
|
|
|
|
struct Elf32_Dyn {
|
|
Elf32_Sword d_tag;
|
|
union {
|
|
Elf32_Word d_val;
|
|
Elf32_Addr d_ptr;
|
|
} d_un;
|
|
};
|
|
|
|
#define DT_NULL 0
|
|
#define DT_NEEDED 1
|
|
#define DT_PLTRELSZ 2
|
|
#define DT_PLTGOT 3
|
|
#define DT_HASH 4
|
|
#define DT_STRTAB 5
|
|
#define DT_SYMTAB 6
|
|
#define DT_RELA 7
|
|
#define DT_RELASZ 8
|
|
#define DT_RELAENT 9
|
|
#define DT_STRSZ 10
|
|
#define DT_SYMENT 11
|
|
#define DT_INIT 12
|
|
#define DT_FINI 13
|
|
#define DT_SONAME 14
|
|
#define DT_RPATH 15
|
|
#define DT_SYMBOLIC 16
|
|
#define DT_REL 17
|
|
#define DT_RELSZ 18
|
|
#define DT_RELENT 19
|
|
#define DT_PLTREL 20
|
|
#define DT_DEBUG 21
|
|
#define DT_TEXTREL 22
|
|
#define DT_JMPREL 23
|
|
|
|
#define DT_LOPROC 0x70000000
|
|
#define DT_HIPROC 0x7fffffff
|
|
|
|
|
|
/*** inline functions ***/
|
|
|
|
#ifdef __cplusplus
|
|
|
|
inline bool
|
|
Elf32_Ehdr::IsHostEndian() const
|
|
{
|
|
#if B_HOST_IS_LENDIAN
|
|
return e_ident[EI_DATA] == ELFDATA2LSB;
|
|
#elif B_HOST_IS_BENDIAN
|
|
return e_ident[EI_DATA] == ELFDATA2MSB;
|
|
#endif
|
|
}
|
|
|
|
|
|
inline bool
|
|
Elf32_Phdr::IsReadWrite() const
|
|
{
|
|
return !(~p_flags & (PF_READ | PF_WRITE));
|
|
}
|
|
|
|
|
|
inline bool
|
|
Elf32_Phdr::IsExecutable() const
|
|
{
|
|
return (p_flags & PF_PROTECTION_MASK) == (PF_READ | PF_EXECUTE);
|
|
}
|
|
|
|
|
|
inline uint8
|
|
Elf32_Sym::Bind() const
|
|
{
|
|
return ELF32_ST_BIND(st_info);
|
|
}
|
|
|
|
|
|
inline uint8
|
|
Elf32_Sym::Type() const
|
|
{
|
|
return ELF32_ST_TYPE(st_info);
|
|
}
|
|
|
|
|
|
inline uint8
|
|
Elf32_Rel::SymbolIndex() const
|
|
{
|
|
return ELF32_R_SYM(r_info);
|
|
}
|
|
|
|
|
|
inline uint8
|
|
Elf32_Rel::Type() const
|
|
{
|
|
return ELF32_R_TYPE(r_info);
|
|
}
|
|
|
|
#endif /* __cplusplus */
|
|
|
|
#endif /* _ELF32_H_ */
|