output/elf32.h

   1 #ifndef OUTPUT_ELF32_H
   2 #define OUTPUT_ELF32_H
   3
   4 #include "output/elfcommon.h"
   5
   6 /* ELF standard typedefs (yet more proof that <stdint.h> was way overdue) */
   7 typedef uint16_t Elf32_Half;
   8 typedef int16_t Elf32_SHalf;
   9 typedef uint32_t Elf32_Word;
  10 typedef int32_t Elf32_Sword;
  11 typedef uint64_t Elf32_Xword;
  12 typedef int64_t Elf32_Sxword;
  13
  14 typedef uint32_t Elf32_Off;
  15 typedef uint32_t Elf32_Addr;
  16 typedef uint16_t Elf32_Section;
  17
  18 /* Dynamic header */
  19
  20 typedef struct elf32_dyn {
  21     Elf32_Sword d_tag;
  22     union {
  23         Elf32_Sword d_val;
  24         Elf32_Addr d_ptr;
  25     } d_un;
  26 } Elf32_Dyn;
  27
  28 /* Relocations */
  29
  30 #define ELF32_R_SYM(x)  ((x) >> 8)
  31 #define ELF32_R_TYPE(x) ((x) & 0xff)
  32
  33 typedef struct elf32_rel {
  34     Elf32_Addr r_offset;
  35     Elf32_Word r_info;
  36 } Elf32_Rel;
  37
  38 typedef struct elf32_rela {
  39     Elf32_Addr r_offset;
  40     Elf32_Word r_info;
  41     Elf32_Sword r_addend;
  42 } Elf32_Rela;
  43
  44 enum reloc32_type {
  45     R_386_32            =  1,   /* ordinary absolute relocation */
  46     R_386_PC32          =  2,   /* PC-relative relocation */
  47     R_386_GOT32         =  3,   /* an offset into GOT */
  48     R_386_PLT32         =  4,   /* a PC-relative offset into PLT */
  49     R_386_COPY          =  5,   /* ??? */
  50     R_386_GLOB_DAT      =  6,   /* ??? */
  51     R_386_JUMP_SLOT     =  7,   /* ??? */
  52     R_386_RELATIVE      =  8,   /* ??? */
  53     R_386_GOTOFF        =  9,   /* an offset from GOT base */
  54     R_386_GOTPC         = 10,   /* a PC-relative offset _to_ GOT */
  55     R_386_TLS_TPOFF     = 14,   /* Offset in static TLS block */
  56     R_386_TLS_IE        = 15,   /* Address of GOT entry for static TLS
  57                                    block offset */
  58     /* These are GNU extensions, but useful */
  59     R_386_16            = 20,   /* A 16-bit absolute relocation */
  60     R_386_PC16          = 21,   /* A 16-bit PC-relative relocation */
  61     R_386_8             = 22,   /* An 8-bit absolute relocation */
  62     R_386_PC8           = 23    /* An 8-bit PC-relative relocation */
  63 };
  64
  65 /* Symbol */
  66
  67 typedef struct elf32_sym {
  68     Elf32_Word st_name;
  69     Elf32_Addr st_value;
  70     Elf32_Word st_size;
  71     unsigned char st_info;
  72     unsigned char st_other;
  73     Elf32_Half st_shndx;
  74 } Elf32_Sym;
  75
  76 /* Main file header */
  77
  78 typedef struct elf32_hdr {
  79     unsigned char e_ident[EI_NIDENT];
  80     Elf32_Half e_type;
  81     Elf32_Half e_machine;
  82     Elf32_Word e_version;
  83     Elf32_Addr e_entry;
  84     Elf32_Off e_phoff;
  85     Elf32_Off e_shoff;
  86     Elf32_Word e_flags;
  87     Elf32_Half e_ehsize;
  88     Elf32_Half e_phentsize;
  89     Elf32_Half e_phnum;
  90     Elf32_Half e_shentsize;
  91     Elf32_Half e_shnum;
  92     Elf32_Half e_shstrndx;
  93 } Elf32_Ehdr;
  94
  95 /* Program header */
  96
  97 typedef struct elf32_phdr {
  98     Elf32_Word p_type;
  99     Elf32_Off p_offset;
 100     Elf32_Addr p_vaddr;
 101     Elf32_Addr p_paddr;
 102     Elf32_Word p_filesz;
 103     Elf32_Word p_memsz;
 104     Elf32_Word p_flags;
 105     Elf32_Word p_align;
 106 } Elf32_Phdr;
 107
 108 /* Section header */
 109
 110 typedef struct elf32_shdr {
 111     Elf32_Word sh_name;
 112     Elf32_Word sh_type;
 113     Elf32_Word sh_flags;
 114     Elf32_Addr sh_addr;
 115     Elf32_Off sh_offset;
 116     Elf32_Word sh_size;
 117     Elf32_Word sh_link;
 118     Elf32_Word sh_info;
 119     Elf32_Word sh_addralign;
 120     Elf32_Word sh_entsize;
 121 } Elf32_Shdr;
 122
 123 /* Note header */
 124 typedef struct elf32_note {
 125     Elf32_Word n_namesz;        /* Name size */
 126     Elf32_Word n_descsz;        /* Content size */
 127     Elf32_Word n_type;  /* Content type */
 128 } Elf32_Nhdr;
 129
 130 /* How to extract and insert information held in the st_info field.  */
 131 #define ELF32_ST_BIND(val)              (((unsigned char) (val)) >> 4)
 132 #define ELF32_ST_TYPE(val)              ((val) & 0xf)
 133
 134 #endif  /* OUTPUT_ELF32_H */