LCOV - code coverage report
Current view: top level - include/linux - elf.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 1 1 100.0 %
Date: 2017-01-25 Functions: 0 0 -

          Line data    Source code
       1             : #ifndef _LINUX_ELF_H
       2             : #define _LINUX_ELF_H
       3             : 
       4             : #include <linux/types.h>
       5             : #include <linux/elf-em.h>
       6             : #ifdef __KERNEL__
       7             : #include <asm/elf.h>
       8             : #endif
       9             : 
      10             : struct file;
      11             : 
      12             : #ifndef elf_read_implies_exec
      13             :   /* Executables for which elf_read_implies_exec() returns TRUE will
      14             :      have the READ_IMPLIES_EXEC personality flag set automatically.
      15             :      Override in asm/elf.h as needed.  */
      16             : # define elf_read_implies_exec(ex, have_pt_gnu_stack)   0
      17             : #endif
      18             : 
      19             : /* 32-bit ELF base types. */
      20             : typedef __u32   Elf32_Addr;
      21             : typedef __u16   Elf32_Half;
      22             : typedef __u32   Elf32_Off;
      23             : typedef __s32   Elf32_Sword;
      24             : typedef __u32   Elf32_Word;
      25             : 
      26             : /* 64-bit ELF base types. */
      27             : typedef __u64   Elf64_Addr;
      28             : typedef __u16   Elf64_Half;
      29             : typedef __s16   Elf64_SHalf;
      30             : typedef __u64   Elf64_Off;
      31             : typedef __s32   Elf64_Sword;
      32             : typedef __u32   Elf64_Word;
      33             : typedef __u64   Elf64_Xword;
      34             : typedef __s64   Elf64_Sxword;
      35             : 
      36             : /* These constants are for the segment types stored in the image headers */
      37             : #define PT_NULL    0
      38             : #define PT_LOAD    1
      39             : #define PT_DYNAMIC 2
      40             : #define PT_INTERP  3
      41             : #define PT_NOTE    4
      42             : #define PT_SHLIB   5
      43             : #define PT_PHDR    6
      44             : #define PT_TLS     7               /* Thread local storage segment */
      45             : #define PT_LOOS    0x60000000      /* OS-specific */
      46             : #define PT_HIOS    0x6fffffff      /* OS-specific */
      47             : #define PT_LOPROC  0x70000000
      48             : #define PT_HIPROC  0x7fffffff
      49             : #define PT_GNU_EH_FRAME         0x6474e550
      50             : 
      51             : #define PT_GNU_STACK    (PT_LOOS + 0x474e551)
      52             : 
      53             : /* These constants define the different elf file types */
      54             : #define ET_NONE   0
      55             : #define ET_REL    1
      56             : #define ET_EXEC   2
      57             : #define ET_DYN    3
      58             : #define ET_CORE   4
      59             : #define ET_LOPROC 0xff00
      60             : #define ET_HIPROC 0xffff
      61             : 
      62             : /* This is the info that is needed to parse the dynamic section of the file */
      63             : #define DT_NULL         0
      64             : #define DT_NEEDED       1
      65             : #define DT_PLTRELSZ     2
      66             : #define DT_PLTGOT       3
      67             : #define DT_HASH         4
      68             : #define DT_STRTAB       5
      69             : #define DT_SYMTAB       6
      70             : #define DT_RELA         7
      71             : #define DT_RELASZ       8
      72             : #define DT_RELAENT      9
      73             : #define DT_STRSZ        10
      74             : #define DT_SYMENT       11
      75             : #define DT_INIT         12
      76             : #define DT_FINI         13
      77             : #define DT_SONAME       14
      78             : #define DT_RPATH        15
      79             : #define DT_SYMBOLIC     16
      80             : #define DT_REL          17
      81             : #define DT_RELSZ        18
      82             : #define DT_RELENT       19
      83             : #define DT_PLTREL       20
      84             : #define DT_DEBUG        21
      85             : #define DT_TEXTREL      22
      86             : #define DT_JMPREL       23
      87             : #define DT_ENCODING     32
      88             : #define OLD_DT_LOOS     0x60000000
      89             : #define DT_LOOS         0x6000000d
      90             : #define DT_HIOS         0x6ffff000
      91             : #define DT_VALRNGLO     0x6ffffd00
      92             : #define DT_VALRNGHI     0x6ffffdff
      93             : #define DT_ADDRRNGLO    0x6ffffe00
      94             : #define DT_ADDRRNGHI    0x6ffffeff
      95             : #define DT_VERSYM       0x6ffffff0
      96             : #define DT_RELACOUNT    0x6ffffff9
      97             : #define DT_RELCOUNT     0x6ffffffa
      98             : #define DT_FLAGS_1      0x6ffffffb
      99             : #define DT_VERDEF       0x6ffffffc
     100             : #define DT_VERDEFNUM    0x6ffffffd
     101             : #define DT_VERNEED      0x6ffffffe
     102             : #define DT_VERNEEDNUM   0x6fffffff
     103             : #define OLD_DT_HIOS     0x6fffffff
     104             : #define DT_LOPROC       0x70000000
     105             : #define DT_HIPROC       0x7fffffff
     106             : 
     107             : /* This info is needed when parsing the symbol table */
     108             : #define STB_LOCAL  0
     109             : #define STB_GLOBAL 1
     110             : #define STB_WEAK   2
     111             : 
     112             : #define STT_NOTYPE  0
     113             : #define STT_OBJECT  1
     114             : #define STT_FUNC    2
     115             : #define STT_SECTION 3
     116             : #define STT_FILE    4
     117             : #define STT_COMMON  5
     118             : #define STT_TLS     6
     119             : 
     120             : #define ELF_ST_BIND(x)          ((x) >> 4)
     121             : #define ELF_ST_TYPE(x)          (((unsigned int) x) & 0xf)
     122             : #define ELF32_ST_BIND(x)        ELF_ST_BIND(x)
     123             : #define ELF32_ST_TYPE(x)        ELF_ST_TYPE(x)
     124             : #define ELF64_ST_BIND(x)        ELF_ST_BIND(x)
     125             : #define ELF64_ST_TYPE(x)        ELF_ST_TYPE(x)
     126             : 
     127             : typedef struct dynamic{
     128             :   Elf32_Sword d_tag;
     129             :   union{
     130             :     Elf32_Sword d_val;
     131             :     Elf32_Addr  d_ptr;
     132             :   } d_un;
     133             : } Elf32_Dyn;
     134             : 
     135             : typedef struct {
     136             :   Elf64_Sxword d_tag;           /* entry tag value */
     137             :   union {
     138             :     Elf64_Xword d_val;
     139             :     Elf64_Addr d_ptr;
     140             :   } d_un;
     141             : } Elf64_Dyn;
     142             : 
     143             : /* The following are used with relocations */
     144             : #define ELF32_R_SYM(x) ((x) >> 8)
     145             : #define ELF32_R_TYPE(x) ((x) & 0xff)
     146             : 
     147             : #define ELF64_R_SYM(i)                  ((i) >> 32)
     148             : #define ELF64_R_TYPE(i)                 ((i) & 0xffffffff)
     149             : 
     150             : typedef struct elf32_rel {
     151             :   Elf32_Addr    r_offset;
     152             :   Elf32_Word    r_info;
     153             : } Elf32_Rel;
     154             : 
     155             : typedef struct elf64_rel {
     156             :   Elf64_Addr r_offset;  /* Location at which to apply the action */
     157             :   Elf64_Xword r_info;   /* index and type of relocation */
     158             : } Elf64_Rel;
     159             : 
     160             : typedef struct elf32_rela{
     161             :   Elf32_Addr    r_offset;
     162             :   Elf32_Word    r_info;
     163             :   Elf32_Sword   r_addend;
     164             : } Elf32_Rela;
     165             : 
     166             : typedef struct elf64_rela {
     167             :   Elf64_Addr r_offset;  /* Location at which to apply the action */
     168             :   Elf64_Xword r_info;   /* index and type of relocation */
     169             :   Elf64_Sxword r_addend;        /* Constant addend used to compute value */
     170             : } Elf64_Rela;
     171             : 
     172             : typedef struct elf32_sym{
     173             :   Elf32_Word    st_name;
     174             :   Elf32_Addr    st_value;
     175             :   Elf32_Word    st_size;
     176             :   unsigned char st_info;
     177             :   unsigned char st_other;
     178             :   Elf32_Half    st_shndx;
     179             : } Elf32_Sym;
     180             : 
     181             : typedef struct elf64_sym {
     182             :   Elf64_Word st_name;           /* Symbol name, index in string tbl */
     183             :   unsigned char st_info;        /* Type and binding attributes */
     184             :   unsigned char st_other;       /* No defined meaning, 0 */
     185             :   Elf64_Half st_shndx;          /* Associated section index */
     186             :   Elf64_Addr st_value;          /* Value of the symbol */
     187             :   Elf64_Xword st_size;          /* Associated symbol size */
     188             : } Elf64_Sym;
     189             : 
     190             : 
     191             : #define EI_NIDENT       16
     192             : 
     193             : typedef struct elf32_hdr{
     194             :   unsigned char e_ident[EI_NIDENT];
     195             :   Elf32_Half    e_type;
     196             :   Elf32_Half    e_machine;
     197             :   Elf32_Word    e_version;
     198             :   Elf32_Addr    e_entry;  /* Entry point */
     199             :   Elf32_Off     e_phoff;
     200             :   Elf32_Off     e_shoff;
     201             :   Elf32_Word    e_flags;
     202             :   Elf32_Half    e_ehsize;
     203             :   Elf32_Half    e_phentsize;
     204             :   Elf32_Half    e_phnum;
     205             :   Elf32_Half    e_shentsize;
     206             :   Elf32_Half    e_shnum;
     207             :   Elf32_Half    e_shstrndx;
     208             : } Elf32_Ehdr;
     209             : 
     210             : typedef struct elf64_hdr {
     211             :   unsigned char e_ident[EI_NIDENT];     /* ELF "magic number" */
     212             :   Elf64_Half e_type;
     213             :   Elf64_Half e_machine;
     214             :   Elf64_Word e_version;
     215             :   Elf64_Addr e_entry;           /* Entry point virtual address */
     216             :   Elf64_Off e_phoff;            /* Program header table file offset */
     217             :   Elf64_Off e_shoff;            /* Section header table file offset */
     218             :   Elf64_Word e_flags;
     219             :   Elf64_Half e_ehsize;
     220             :   Elf64_Half e_phentsize;
     221             :   Elf64_Half e_phnum;
     222             :   Elf64_Half e_shentsize;
     223             :   Elf64_Half e_shnum;
     224             :   Elf64_Half e_shstrndx;
     225             : } Elf64_Ehdr;
     226             : 
     227             : /* These constants define the permissions on sections in the program
     228             :    header, p_flags. */
     229             : #define PF_R            0x4
     230             : #define PF_W            0x2
     231             : #define PF_X            0x1
     232             : 
     233             : typedef struct elf32_phdr{
     234             :   Elf32_Word    p_type;
     235             :   Elf32_Off     p_offset;
     236             :   Elf32_Addr    p_vaddr;
     237             :   Elf32_Addr    p_paddr;
     238             :   Elf32_Word    p_filesz;
     239             :   Elf32_Word    p_memsz;
     240             :   Elf32_Word    p_flags;
     241             :   Elf32_Word    p_align;
     242             : } Elf32_Phdr;
     243             : 
     244             : typedef struct elf64_phdr {
     245             :   Elf64_Word p_type;
     246             :   Elf64_Word p_flags;
     247             :   Elf64_Off p_offset;           /* Segment file offset */
     248             :   Elf64_Addr p_vaddr;           /* Segment virtual address */
     249             :   Elf64_Addr p_paddr;           /* Segment physical address */
     250             :   Elf64_Xword p_filesz;         /* Segment size in file */
     251             :   Elf64_Xword p_memsz;          /* Segment size in memory */
     252             :   Elf64_Xword p_align;          /* Segment alignment, file & memory */
     253             : } Elf64_Phdr;
     254             : 
     255             : /* sh_type */
     256             : #define SHT_NULL        0
     257             : #define SHT_PROGBITS    1
     258             : #define SHT_SYMTAB      2
     259             : #define SHT_STRTAB      3
     260             : #define SHT_RELA        4
     261             : #define SHT_HASH        5
     262             : #define SHT_DYNAMIC     6
     263             : #define SHT_NOTE        7
     264             : #define SHT_NOBITS      8
     265             : #define SHT_REL         9
     266             : #define SHT_SHLIB       10
     267             : #define SHT_DYNSYM      11
     268             : #define SHT_NUM         12
     269             : #define SHT_LOPROC      0x70000000
     270             : #define SHT_HIPROC      0x7fffffff
     271             : #define SHT_LOUSER      0x80000000
     272             : #define SHT_HIUSER      0xffffffff
     273             : 
     274             : /* sh_flags */
     275             : #define SHF_WRITE       0x1
     276             : #define SHF_ALLOC       0x2
     277             : #define SHF_EXECINSTR   0x4
     278             : #define SHF_MASKPROC    0xf0000000
     279             : 
     280             : /* special section indexes */
     281             : #define SHN_UNDEF       0
     282             : #define SHN_LORESERVE   0xff00
     283             : #define SHN_LOPROC      0xff00
     284             : #define SHN_HIPROC      0xff1f
     285             : #define SHN_ABS         0xfff1
     286             : #define SHN_COMMON      0xfff2
     287             : #define SHN_HIRESERVE   0xffff
     288             :  
     289             : typedef struct {
     290             :   Elf32_Word    sh_name;
     291             :   Elf32_Word    sh_type;
     292             :   Elf32_Word    sh_flags;
     293             :   Elf32_Addr    sh_addr;
     294             :   Elf32_Off     sh_offset;
     295             :   Elf32_Word    sh_size;
     296             :   Elf32_Word    sh_link;
     297             :   Elf32_Word    sh_info;
     298             :   Elf32_Word    sh_addralign;
     299             :   Elf32_Word    sh_entsize;
     300             : } Elf32_Shdr;
     301             : 
     302             : typedef struct elf64_shdr {
     303             :   Elf64_Word sh_name;           /* Section name, index in string tbl */
     304             :   Elf64_Word sh_type;           /* Type of section */
     305             :   Elf64_Xword sh_flags;         /* Miscellaneous section attributes */
     306             :   Elf64_Addr sh_addr;           /* Section virtual addr at execution */
     307             :   Elf64_Off sh_offset;          /* Section file offset */
     308             :   Elf64_Xword sh_size;          /* Size of section in bytes */
     309             :   Elf64_Word sh_link;           /* Index of another section */
     310             :   Elf64_Word sh_info;           /* Additional section information */
     311             :   Elf64_Xword sh_addralign;     /* Section alignment */
     312             :   Elf64_Xword sh_entsize;       /* Entry size if section holds table */
     313             : } Elf64_Shdr;
     314             : 
     315             : #define EI_MAG0         0               /* e_ident[] indexes */
     316             : #define EI_MAG1         1
     317             : #define EI_MAG2         2
     318             : #define EI_MAG3         3
     319             : #define EI_CLASS        4
     320             : #define EI_DATA         5
     321             : #define EI_VERSION      6
     322             : #define EI_OSABI        7
     323             : #define EI_PAD          8
     324             : 
     325             : #define ELFMAG0         0x7f            /* EI_MAG */
     326             : #define ELFMAG1         'E'
     327             : #define ELFMAG2         'L'
     328             : #define ELFMAG3         'F'
     329             : #define ELFMAG          "\177ELF"
     330             : #define SELFMAG         4
     331             : 
     332             : #define ELFCLASSNONE    0               /* EI_CLASS */
     333             : #define ELFCLASS32      1
     334             : #define ELFCLASS64      2
     335             : #define ELFCLASSNUM     3
     336             : 
     337             : #define ELFDATANONE     0               /* e_ident[EI_DATA] */
     338             : #define ELFDATA2LSB     1
     339             : #define ELFDATA2MSB     2
     340             : 
     341             : #define EV_NONE         0               /* e_version, EI_VERSION */
     342             : #define EV_CURRENT      1
     343             : #define EV_NUM          2
     344             : 
     345             : #define ELFOSABI_NONE   0
     346             : #define ELFOSABI_LINUX  3
     347             : 
     348             : #ifndef ELF_OSABI
     349             : #define ELF_OSABI ELFOSABI_NONE
     350             : #endif
     351             : 
     352             : /* Notes used in ET_CORE */
     353             : #define NT_PRSTATUS     1
     354             : #define NT_PRFPREG      2
     355             : #define NT_PRPSINFO     3
     356             : #define NT_TASKSTRUCT   4
     357             : #define NT_AUXV         6
     358             : #define NT_PRXFPREG     0x46e62b7f      /* copied from gdb5.1/include/elf/common.h */
     359             : #define NT_PPC_VMX      0x100           /* PowerPC Altivec/VMX registers */
     360             : #define NT_PPC_SPE      0x101           /* PowerPC SPE/EVR registers */
     361             : #define NT_PPC_VSX      0x102           /* PowerPC VSX registers */
     362             : #define NT_386_TLS      0x200           /* i386 TLS slots (struct user_desc) */
     363             : #define NT_386_IOPERM   0x201           /* x86 io permission bitmap (1=deny) */
     364             : #define NT_S390_HIGH_GPRS       0x300   /* s390 upper register halves */
     365             : 
     366             : 
     367             : /* Note header in a PT_NOTE section */
     368             : typedef struct elf32_note {
     369             :   Elf32_Word    n_namesz;       /* Name size */
     370             :   Elf32_Word    n_descsz;       /* Content size */
     371             :   Elf32_Word    n_type;         /* Content type */
     372             : } Elf32_Nhdr;
     373             : 
     374             : /* Note header in a PT_NOTE section */
     375             : typedef struct elf64_note {
     376             :   Elf64_Word n_namesz;  /* Name size */
     377             :   Elf64_Word n_descsz;  /* Content size */
     378             :   Elf64_Word n_type;    /* Content type */
     379             : } Elf64_Nhdr;
     380             : 
     381             : #ifdef __KERNEL__
     382             : #if ELF_CLASS == ELFCLASS32
     383             : 
     384             : extern Elf32_Dyn _DYNAMIC [];
     385             : #define elfhdr          elf32_hdr
     386             : #define elf_phdr        elf32_phdr
     387             : #define elf_note        elf32_note
     388             : #define elf_addr_t      Elf32_Off
     389             : 
     390             : #else
     391             : 
     392             : extern Elf64_Dyn _DYNAMIC [];
     393             : #define elfhdr          elf64_hdr
     394             : #define elf_phdr        elf64_phdr
     395             : #define elf_note        elf64_note
     396             : #define elf_addr_t      Elf64_Off
     397             : 
     398             : #endif
     399             : 
     400             : /* Optional callbacks to write extra ELF notes. */
     401             : #ifndef ARCH_HAVE_EXTRA_ELF_NOTES
     402             : static inline int elf_coredump_extra_notes_size(void) { return 0; }
     403             : static inline int elf_coredump_extra_notes_write(struct file *file,
     404             :                         loff_t *foffset) { return 0; }
     405             : #else
     406           1 : extern int elf_coredump_extra_notes_size(void);
     407             : extern int elf_coredump_extra_notes_write(struct file *file, loff_t *foffset);
     408             : #endif
     409             : #endif /* __KERNEL__ */
     410             : #endif /* _LINUX_ELF_H */

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