426 lines
11 KiB
C
426 lines
11 KiB
C
|
/*
|
||
|
* ELF register definitions..
|
||
|
*/
|
||
|
|
||
|
#include <inttypes.h>
|
||
|
|
||
|
typedef uint32_t elf_greg_t;
|
||
|
|
||
|
#define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t))
|
||
|
typedef elf_greg_t elf_gregset_t[ELF_NGREG];
|
||
|
|
||
|
typedef struct user_i387_struct elf_fpregset_t;
|
||
|
|
||
|
/*
|
||
|
* This is used to ensure we don't load something for the wrong architecture.
|
||
|
*/
|
||
|
#define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
|
||
|
|
||
|
/*
|
||
|
* These are used to set parameters in the core dumps.
|
||
|
*/
|
||
|
#define ELF_CLASS ELFCLASS32
|
||
|
#define ELF_DATA ELFDATA2LSB;
|
||
|
#define ELF_ARCH EM_386
|
||
|
|
||
|
/* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
|
||
|
starts %edx contains a pointer to a function which might be
|
||
|
registered using `atexit'. This provides a mean for the
|
||
|
dynamic linker to call DT_FINI functions for shared libraries
|
||
|
that have been loaded before the code runs.
|
||
|
|
||
|
A value of 0 tells we have no such handler. */
|
||
|
#define ELF_PLAT_INIT(_r) _r->edx = 0
|
||
|
|
||
|
#define USE_ELF_CORE_DUMP
|
||
|
#define ELF_EXEC_PAGESIZE 4096
|
||
|
|
||
|
|
||
|
typedef uint32_t Elf32_Addr;
|
||
|
typedef uint16_t Elf32_Half;
|
||
|
typedef uint32_t Elf32_Off;
|
||
|
typedef int32_t Elf32_Sword;
|
||
|
typedef uint32_t Elf32_Word;
|
||
|
|
||
|
/* These constants are for the segment types stored in the image headers */
|
||
|
#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
|
||
|
|
||
|
/* These constants define the different elf file types */
|
||
|
#define ET_NONE 0
|
||
|
#define ET_REL 1
|
||
|
#define ET_EXEC 2
|
||
|
#define ET_DYN 3
|
||
|
#define ET_CORE 4
|
||
|
#define ET_LOPROC 5
|
||
|
#define ET_HIPROC 6
|
||
|
|
||
|
/* These constants define the various ELF target machines */
|
||
|
#define EM_NONE 0
|
||
|
#define EM_M32 1
|
||
|
#define EM_SPARC 2
|
||
|
#define EM_386 3
|
||
|
#define EM_68K 4
|
||
|
#define EM_88K 5
|
||
|
#define EM_486 6 /* Perhaps disused */
|
||
|
#define EM_860 7
|
||
|
|
||
|
#define EM_MIPS 8 /* MIPS R3000 (officially, big-endian only) */
|
||
|
|
||
|
#define EM_MIPS_RS4_BE 10 /* MIPS R4000 big-endian */
|
||
|
|
||
|
#define EM_SPARC64 11 /* SPARC v9 (not official) 64-bit */
|
||
|
|
||
|
#define EM_PARISC 15 /* HPPA */
|
||
|
|
||
|
#define EM_SPARC32PLUS 18 /* Sun's "v8plus" */
|
||
|
|
||
|
#define EM_PPC 20 /* PowerPC */
|
||
|
|
||
|
/*
|
||
|
* This is an interim value that we will use until the committee comes
|
||
|
* up with a final number.
|
||
|
*/
|
||
|
#define EM_ALPHA 0x9026
|
||
|
|
||
|
|
||
|
/* This is the info that is needed to parse the dynamic section of the file */
|
||
|
#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
|
||
|
|
||
|
/* This info is needed when parsing the symbol table */
|
||
|
#define STB_LOCAL 0
|
||
|
#define STB_GLOBAL 1
|
||
|
#define STB_WEAK 2
|
||
|
|
||
|
#define STT_NOTYPE 0
|
||
|
#define STT_OBJECT 1
|
||
|
#define STT_FUNC 2
|
||
|
#define STT_SECTION 3
|
||
|
#define STT_FILE 4
|
||
|
|
||
|
#define ELF32_ST_BIND(x) ((x) >> 4)
|
||
|
#define ELF32_ST_TYPE(x) (((unsigned int) x) & 0xf)
|
||
|
|
||
|
/* Symbolic values for the entries in the auxiliary table
|
||
|
put on the initial stack */
|
||
|
#define AT_NULL 0 /* end of vector */
|
||
|
#define AT_IGNORE 1 /* entry should be ignored */
|
||
|
#define AT_EXECFD 2 /* file descriptor of program */
|
||
|
#define AT_PHDR 3 /* program headers for program */
|
||
|
#define AT_PHENT 4 /* size of program header entry */
|
||
|
#define AT_PHNUM 5 /* number of program headers */
|
||
|
#define AT_PAGESZ 6 /* system page size */
|
||
|
#define AT_BASE 7 /* base address of interpreter */
|
||
|
#define AT_FLAGS 8 /* flags */
|
||
|
#define AT_ENTRY 9 /* entry point of program */
|
||
|
#define AT_NOTELF 10 /* program is not ELF */
|
||
|
#define AT_UID 11 /* real uid */
|
||
|
#define AT_EUID 12 /* effective uid */
|
||
|
#define AT_GID 13 /* real gid */
|
||
|
#define AT_EGID 14 /* effective gid */
|
||
|
|
||
|
|
||
|
typedef struct dynamic{
|
||
|
Elf32_Sword d_tag;
|
||
|
union{
|
||
|
Elf32_Sword d_val;
|
||
|
Elf32_Addr d_ptr;
|
||
|
} d_un;
|
||
|
} Elf32_Dyn;
|
||
|
|
||
|
typedef struct {
|
||
|
unsigned long long d_tag; /* entry tag value */
|
||
|
union {
|
||
|
unsigned long long d_val;
|
||
|
unsigned long long d_ptr;
|
||
|
} d_un;
|
||
|
} Elf64_Dyn;
|
||
|
|
||
|
/* The following are used with relocations */
|
||
|
#define ELF32_R_SYM(x) ((x) >> 8)
|
||
|
#define ELF32_R_TYPE(x) ((x) & 0xff)
|
||
|
|
||
|
#define R_386_NONE 0
|
||
|
#define R_386_32 1
|
||
|
#define R_386_PC32 2
|
||
|
#define R_386_GOT32 3
|
||
|
#define R_386_PLT32 4
|
||
|
#define R_386_COPY 5
|
||
|
#define R_386_GLOB_DAT 6
|
||
|
#define R_386_JMP_SLOT 7
|
||
|
#define R_386_RELATIVE 8
|
||
|
#define R_386_GOTOFF 9
|
||
|
#define R_386_GOTPC 10
|
||
|
#define R_386_NUM 11
|
||
|
|
||
|
typedef struct elf32_rel {
|
||
|
Elf32_Addr r_offset;
|
||
|
Elf32_Word r_info;
|
||
|
} Elf32_Rel;
|
||
|
|
||
|
typedef struct elf64_rel {
|
||
|
unsigned long long r_offset; /* Location at which to apply the action */
|
||
|
unsigned long long r_info; /* index and type of relocation */
|
||
|
} Elf64_Rel;
|
||
|
|
||
|
typedef struct elf32_rela{
|
||
|
Elf32_Addr r_offset;
|
||
|
Elf32_Word r_info;
|
||
|
Elf32_Sword r_addend;
|
||
|
} Elf32_Rela;
|
||
|
|
||
|
typedef struct elf64_rela {
|
||
|
unsigned long long r_offset; /* Location at which to apply the action */
|
||
|
unsigned long long r_info; /* index and type of relocation */
|
||
|
unsigned long long r_addend; /* Constant addend used to compute value */
|
||
|
} Elf64_Rela;
|
||
|
|
||
|
typedef struct elf32_sym{
|
||
|
Elf32_Word st_name;
|
||
|
Elf32_Addr st_value;
|
||
|
Elf32_Word st_size;
|
||
|
unsigned char st_info;
|
||
|
unsigned char st_other;
|
||
|
Elf32_Half st_shndx;
|
||
|
} Elf32_Sym;
|
||
|
|
||
|
typedef struct elf64_sym {
|
||
|
unsigned int st_name; /* Symbol name, index in string tbl */
|
||
|
unsigned char st_info; /* Type and binding attributes */
|
||
|
unsigned char st_other; /* No defined meaning, 0 */
|
||
|
unsigned short st_shndx; /* Associated section index */
|
||
|
unsigned long long st_value; /* Value of the symbol */
|
||
|
unsigned long long st_size; /* Associated symbol size */
|
||
|
} Elf64_Sym;
|
||
|
|
||
|
|
||
|
#define EI_NIDENT 16
|
||
|
|
||
|
typedef struct elf32_hdr{
|
||
|
unsigned char e_ident[EI_NIDENT];
|
||
|
Elf32_Half e_type;
|
||
|
Elf32_Half e_machine;
|
||
|
Elf32_Word e_version;
|
||
|
Elf32_Addr e_entry; /* Entry point */
|
||
|
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;
|
||
|
} Elf32_Ehdr;
|
||
|
|
||
|
typedef struct elf64_hdr {
|
||
|
unsigned char e_ident[16]; /* ELF "magic number" */
|
||
|
short int e_type;
|
||
|
short unsigned int e_machine;
|
||
|
int e_version;
|
||
|
unsigned long long e_entry; /* Entry point virtual address */
|
||
|
unsigned long long e_phoff; /* Program header table file offset */
|
||
|
unsigned long long e_shoff; /* Section header table file offset */
|
||
|
int e_flags;
|
||
|
short int e_ehsize;
|
||
|
short int e_phentsize;
|
||
|
short int e_phnum;
|
||
|
short int e_shentsize;
|
||
|
short int e_shnum;
|
||
|
short int e_shstrndx;
|
||
|
} Elf64_Ehdr;
|
||
|
|
||
|
/* These constants define the permissions on sections in the program
|
||
|
header, p_flags. */
|
||
|
#define PF_R 0x4
|
||
|
#define PF_W 0x2
|
||
|
#define PF_X 0x1
|
||
|
|
||
|
typedef struct elf32_phdr{
|
||
|
Elf32_Word p_type;
|
||
|
Elf32_Off p_offset;
|
||
|
Elf32_Addr p_vaddr;
|
||
|
Elf32_Addr p_paddr;
|
||
|
Elf32_Word p_filesz;
|
||
|
Elf32_Word p_memsz;
|
||
|
Elf32_Word p_flags;
|
||
|
Elf32_Word p_align;
|
||
|
} Elf32_Phdr;
|
||
|
|
||
|
typedef struct elf64_phdr {
|
||
|
int p_type;
|
||
|
int p_flags;
|
||
|
unsigned long long p_offset; /* Segment file offset */
|
||
|
unsigned long long p_vaddr; /* Segment virtual address */
|
||
|
unsigned long long p_paddr; /* Segment physical address */
|
||
|
unsigned long long p_filesz; /* Segment size in file */
|
||
|
unsigned long long p_memsz; /* Segment size in memory */
|
||
|
unsigned long long p_align; /* Segment alignment, file & memory */
|
||
|
} Elf64_Phdr;
|
||
|
|
||
|
/* sh_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_NUM 12
|
||
|
#define SHT_LOPROC 0x70000000
|
||
|
#define SHT_HIPROC 0x7fffffff
|
||
|
#define SHT_LOUSER 0x80000000
|
||
|
#define SHT_HIUSER 0xffffffff
|
||
|
|
||
|
/* sh_flags */
|
||
|
#define SHF_WRITE 0x1
|
||
|
#define SHF_ALLOC 0x2
|
||
|
#define SHF_EXECINSTR 0x4
|
||
|
#define SHF_MASKPROC 0xf0000000
|
||
|
|
||
|
/* special section indexes */
|
||
|
#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
|
||
|
|
||
|
typedef struct {
|
||
|
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;
|
||
|
} Elf32_Shdr;
|
||
|
|
||
|
typedef struct elf64_shdr {
|
||
|
unsigned int sh_name; /* Section name, index in string tbl */
|
||
|
unsigned int sh_type; /* Type of section */
|
||
|
unsigned long long sh_flags; /* Miscellaneous section attributes */
|
||
|
unsigned long long sh_addr; /* Section virtual addr at execution */
|
||
|
unsigned long long sh_offset; /* Section file offset */
|
||
|
unsigned long long sh_size; /* Size of section in bytes */
|
||
|
unsigned int sh_link; /* Index of another section */
|
||
|
unsigned int sh_info; /* Additional section information */
|
||
|
unsigned long long sh_addralign; /* Section alignment */
|
||
|
unsigned long long sh_entsize; /* Entry size if section holds table */
|
||
|
} Elf64_Shdr;
|
||
|
|
||
|
#define EI_MAG0 0 /* e_ident[] indexes */
|
||
|
#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
|
||
|
|
||
|
#define ELFMAG0 0x7f /* EI_MAG */
|
||
|
#define ELFMAG1 'E'
|
||
|
#define ELFMAG2 'L'
|
||
|
#define ELFMAG3 'F'
|
||
|
#define ELFMAG "\177ELF"
|
||
|
#define SELFMAG 4
|
||
|
|
||
|
#define ELFCLASSNONE 0 /* EI_CLASS */
|
||
|
#define ELFCLASS32 1
|
||
|
#define ELFCLASS64 2
|
||
|
#define ELFCLASSNUM 3
|
||
|
|
||
|
#define ELFDATANONE 0 /* e_ident[EI_DATA] */
|
||
|
#define ELFDATA2LSB 1
|
||
|
#define ELFDATA2MSB 2
|
||
|
|
||
|
#define EV_NONE 0 /* e_version, EI_VERSION */
|
||
|
#define EV_CURRENT 1
|
||
|
#define EV_NUM 2
|
||
|
|
||
|
/* Notes used in ET_CORE */
|
||
|
#define NT_PRSTATUS 1
|
||
|
#define NT_PRFPREG 2
|
||
|
#define NT_PRPSINFO 3
|
||
|
#define NT_TASKSTRUCT 4
|
||
|
|
||
|
/* Note header in a PT_NOTE section */
|
||
|
typedef struct elf32_note {
|
||
|
Elf32_Word n_namesz; /* Name size */
|
||
|
Elf32_Word n_descsz; /* Content size */
|
||
|
Elf32_Word n_type; /* Content type */
|
||
|
} Elf32_Nhdr;
|
||
|
|
||
|
/* Note header in a PT_NOTE section */
|
||
|
/*
|
||
|
* For now we use the 32 bit version of the structure until we figure
|
||
|
* out whether we need anything better. Note - on the Alpha, "unsigned int"
|
||
|
* is only 32 bits.
|
||
|
*/
|
||
|
typedef struct elf64_note {
|
||
|
unsigned int n_namesz; /* Name size */
|
||
|
unsigned int n_descsz; /* Content size */
|
||
|
unsigned int n_type; /* Content type */
|
||
|
} Elf64_Nhdr;
|
||
|
|
||
|
#define ELF_START_MMAP 0x80000000
|
||
|
|
||
|
#if ELF_CLASS == ELFCLASS32
|
||
|
|
||
|
extern Elf32_Dyn _DYNAMIC [];
|
||
|
#define elfhdr elf32_hdr
|
||
|
#define elf_phdr elf32_phdr
|
||
|
#define elf_note elf32_note
|
||
|
|
||
|
#else
|
||
|
|
||
|
extern Elf64_Dyn _DYNAMIC [];
|
||
|
#define elfhdr elf64_hdr
|
||
|
#define elf_phdr elf64_phdr
|
||
|
#define elf_note elf64_note
|
||
|
|
||
|
#endif
|
||
|
|
||
|
|