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Diffstat (limited to 'libelf/libelf.h')
| -rw-r--r-- | libelf/libelf.h | 343 |
1 files changed, 343 insertions, 0 deletions
diff --git a/libelf/libelf.h b/libelf/libelf.h new file mode 100644 index 00000000..5b3dc00b --- /dev/null +++ b/libelf/libelf.h @@ -0,0 +1,343 @@ +/* Interface for libelf. + Copyright (C) 1998, 1999, 2000, 2002, 2004 Red Hat, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, version 2. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software Foundation, + Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +#ifndef _LIBELF_H +#define _LIBELF_H 1 + +#include <sys/types.h> + +/* Get the ELF types. */ +#include <elf.h> + + +/* Known translation types. */ +typedef enum +{ + ELF_T_BYTE, /* unsigned char */ + ELF_T_ADDR, /* Elf32_Addr, Elf64_Addr, ... */ + ELF_T_DYN, /* Dynamic section record. */ + ELF_T_EHDR, /* ELF header. */ + ELF_T_HALF, /* Elf32_Half, Elf64_Half, ... */ + ELF_T_OFF, /* Elf32_Off, Elf64_Off, ... */ + ELF_T_PHDR, /* Program header. */ + ELF_T_RELA, /* Relocation entry with addend. */ + ELF_T_REL, /* Relocation entry. */ + ELF_T_SHDR, /* Section header. */ + ELF_T_SWORD, /* Elf32_Sword, Elf64_Sword, ... */ + ELF_T_SYM, /* Symbol record. */ + ELF_T_WORD, /* Elf32_Word, Elf64_Word, ... */ + ELF_T_XWORD, /* Elf32_Xword, Elf64_Xword, ... */ + ELF_T_SXWORD, /* Elf32_Sxword, Elf64_Sxword, ... */ + ELF_T_VDEF, /* Elf32_Verdef, Elf64_Verdef, ... */ + ELF_T_VDAUX, /* Elf32_Verdaux, Elf64_Verdaux, ... */ + ELF_T_VNEED, /* Elf32_Verneed, Elf64_Verneed, ... */ + ELF_T_VNAUX, /* Elf32_Vernaux, Elf64_Vernaux, ... */ + ELF_T_NHDR, /* Elf32_Nhdr, Elf64_Nhdr, ... */ + ELF_T_SYMINFO, /* Elf32_Syminfo, Elf64_Syminfo, ... */ + ELF_T_MOVE, /* Elf32_Move, Elf64_Move, ... */ + ELF_T_LIB, /* Elf32_Lib, Elf64_Lib, ... */ + /* Keep this the last entry. */ + ELF_T_NUM +} Elf_Type; + +/* Descriptor for data to be converted to or from memory format. */ +typedef struct +{ + void *d_buf; /* Pointer to the actual data. */ + Elf_Type d_type; /* Type of this piece of data. */ + unsigned int d_version; /* ELF version. */ + size_t d_size; /* Size in bytes. */ + off_t d_off; /* Offset into section. */ + size_t d_align; /* Alignment in section. */ +} Elf_Data; + + +/* Commands for `...'. */ +typedef enum +{ + ELF_C_NULL, /* Nothing, terminate, or compute only. */ + ELF_C_READ, /* Read .. */ + ELF_C_RDWR, /* Read and write .. */ + ELF_C_WRITE, /* Write .. */ + ELF_C_CLR, /* Clear flag. */ + ELF_C_SET, /* Set flag. */ + ELF_C_FDDONE, /* Signal that file descriptor will not be + used anymore. */ + ELF_C_FDREAD, /* Read rest of data so that file descriptor + is not used anymore. */ + /* The following are extensions. */ + ELF_C_READ_MMAP, /* Read, but mmap the file if possible. */ + ELF_C_RDWR_MMAP, /* Read and write, with mmap. */ + ELF_C_WRITE_MMAP, /* Write, with mmap. */ + ELF_C_READ_MMAP_PRIVATE, /* Read, but memory is writable, results are + not written to the file. */ + ELF_C_EMPTY, /* Copy basic file data but not the content. */ + /* Keep this the last entry. */ + ELF_C_NUM +} Elf_Cmd; + + +/* Flags for the ELF structures. */ +enum +{ + ELF_F_DIRTY = 0x1, +#define ELF_F_DIRTY ELF_F_DIRTY + ELF_F_LAYOUT = 0x4, +#define ELF_F_LAYOUT ELF_F_LAYOUT + ELF_F_PERMISSIVE = 0x8 +#define ELF_F_PERMISSIVE ELF_F_PERMISSIVE +}; + + +/* Identification values for recognized object files. */ +typedef enum +{ + ELF_K_NONE, /* Unknown. */ + ELF_K_AR, /* Archive. */ + ELF_K_COFF, /* Stupid old COFF. */ + ELF_K_ELF, /* ELF file. */ + /* Keep this the last entry. */ + ELF_K_NUM +} Elf_Kind; + + +/* Archive member header. */ +typedef struct +{ + char *ar_name; /* Name of archive member. */ + time_t ar_date; /* File date. */ + uid_t ar_uid; /* User ID. */ + gid_t ar_gid; /* Group ID. */ + mode_t ar_mode; /* File mode. */ + off_t ar_size; /* File size. */ + char *ar_rawname; /* Original name of archive member. */ +} Elf_Arhdr; + + +/* Archive symbol table entry. */ +typedef struct +{ + char *as_name; /* Symbol name. */ + size_t as_off; /* Offset for this file in the archive. */ + unsigned long int as_hash; /* Hash value of the name. */ +} Elf_Arsym; + + +/* Descriptor for the ELF file. */ +typedef struct Elf Elf; + +/* Descriptor for ELF file section. */ +typedef struct Elf_Scn Elf_Scn; + + +#ifdef __cplusplus +extern "C" { +#endif + +/* Return descriptor for ELF file to work according to CMD. */ +extern Elf *elf_begin (int __fildes, Elf_Cmd __cmd, Elf *__ref); + +/* Create a clone of an existing ELF descriptor. */ + extern Elf *elf_clone (Elf *__elf, Elf_Cmd __cmd); + +/* Create descriptor for memory region. */ +extern Elf *elf_memory (char *__image, size_t __size); + +/* Advance archive descriptor to next element. */ +extern Elf_Cmd elf_next (Elf *__elf); + +/* Free resources allocated for ELF. */ +extern int elf_end (Elf *__elf); + +/* Update ELF descriptor and write file to disk. */ +extern off_t elf_update (Elf *__elf, Elf_Cmd __cmd); + +/* Determine what kind of file is associated with ELF. */ +extern Elf_Kind elf_kind (Elf *__elf) __attribute__ ((__pure__)); + +/* Get the base offset for an object file. */ +extern off_t elf_getbase (Elf *__elf); + + +/* Retrieve file identification data. */ +extern char *elf_getident (Elf *__elf, size_t *__ptr); + +/* Retrieve class-dependent object file header. */ +extern Elf32_Ehdr *elf32_getehdr (Elf *__elf); +/* Similar but this time the binary calls is ELFCLASS64. */ +extern Elf64_Ehdr *elf64_getehdr (Elf *__elf); + +/* Create ELF header if none exists. */ +extern Elf32_Ehdr *elf32_newehdr (Elf *__elf); +/* Similar but this time the binary calls is ELFCLASS64. */ +extern Elf64_Ehdr *elf64_newehdr (Elf *__elf); + +/* Retrieve class-dependent program header table. */ +extern Elf32_Phdr *elf32_getphdr (Elf *__elf); +/* Similar but this time the binary calls is ELFCLASS64. */ +extern Elf64_Phdr *elf64_getphdr (Elf *__elf); + +/* Create ELF program header. */ +extern Elf32_Phdr *elf32_newphdr (Elf *__elf, size_t __cnt); +/* Similar but this time the binary calls is ELFCLASS64. */ +extern Elf64_Phdr *elf64_newphdr (Elf *__elf, size_t __cnt); + + +/* Get section at INDEX. */ +extern Elf_Scn *elf_getscn (Elf *__elf, size_t __index); + +/* Get index of section. */ +extern size_t elf_ndxscn (Elf_Scn *__scn); + +/* Get section with next section index. */ +extern Elf_Scn *elf_nextscn (Elf *__elf, Elf_Scn *__scn); + +/* Create a new section and append it at the end of the table. */ +extern Elf_Scn *elf_newscn (Elf *__elf); + +/* Get the number of sections in the ELF file. If the file uses more + sections than can be represented in the e_shnum field of the ELF + header the information from the sh_size field in the zeroth section + header is used. */ +extern int elf_getshnum (Elf *__elf, size_t *__dst); + + +/* Get the section index of the section header string table in the ELF + file. If the index cannot be represented in the e_shnum field of + the ELF header the information from the sh_link field in the zeroth + section header is used. */ +extern int elf_getshstrndx (Elf *__elf, size_t *__dst); + + +/* Retrieve section header of ELFCLASS32 binary. */ +extern Elf32_Shdr *elf32_getshdr (Elf_Scn *__scn); +/* Similar for ELFCLASS64. */ +extern Elf64_Shdr *elf64_getshdr (Elf_Scn *__scn); + + +/* Set or clear flags for ELF file. */ +extern unsigned int elf_flagelf (Elf *__elf, Elf_Cmd __cmd, + unsigned int __flags); +/* Similarly for the ELF header. */ +extern unsigned int elf_flagehdr (Elf *__elf, Elf_Cmd __cmd, + unsigned int __flags); +/* Similarly for the ELF program header. */ +extern unsigned int elf_flagphdr (Elf *__elf, Elf_Cmd __cmd, + unsigned int __flags); +/* Similarly for the given ELF section. */ +extern unsigned int elf_flagscn (Elf_Scn *__scn, Elf_Cmd __cmd, + unsigned int __flags); +/* Similarly for the given ELF data. */ +extern unsigned int elf_flagdata (Elf_Data *__data, Elf_Cmd __cmd, + unsigned int __flags); +/* Similarly for the given ELF section header. */ +extern unsigned int elf_flagshdr (Elf_Scn *__scn, Elf_Cmd __cmd, + unsigned int __flags); + + +/* Get data from section while translating from file representation + to memory representation. */ +extern Elf_Data *elf_getdata (Elf_Scn *__scn, Elf_Data *__data); + +/* Get uninterpreted section content. */ +extern Elf_Data *elf_rawdata (Elf_Scn *__scn, Elf_Data *__data); + +/* Create new data descriptor for section SCN. */ +extern Elf_Data *elf_newdata (Elf_Scn *__scn); + + +/* Return pointer to string at OFFSET in section INDEX. */ +extern char *elf_strptr (Elf *__elf, size_t __index, size_t __offset); + + +/* Return header of archive. */ +extern Elf_Arhdr *elf_getarhdr (Elf *__elf); + +/* Select archive element at OFFSET. */ +extern size_t elf_rand (Elf *__elf, size_t __offset); + +/* Get symbol table of archhive. */ +extern Elf_Arsym *elf_getarsym (Elf *__elf, size_t *__ptr); + + +/* Control ELF descriptor. */ +extern int elf_cntl (Elf *__elf, Elf_Cmd __cmd); + +/* Retrieve uninterpreted file contents. */ +extern char *elf_rawfile (Elf *__elf, size_t *__ptr); + + +/* Return size of array of COUNT elements of the type denoted by TYPE + in the external representation. The binary class is taken from ELF. + The result is based on version VERSION of the ELF standard. */ +extern size_t elf32_fsize (Elf_Type __type, size_t __count, + unsigned int __version) + __attribute__ ((__const__)); +/* Similar but this time the binary calls is ELFCLASS64. */ +extern size_t elf64_fsize (Elf_Type __type, size_t __count, + unsigned int __version) + __attribute__ ((__const__)); + + +/* Convert data structure from the representation in the file represented + by ELF to their memory representation. */ +extern Elf_Data *elf32_xlatetom (Elf_Data *__dest, const Elf_Data *__src, + unsigned int __encode); +/* Same for 64 bit class. */ +extern Elf_Data *elf64_xlatetom (Elf_Data *__dest, const Elf_Data *__src, + unsigned int __encode); + +/* Convert data structure from to the representation in memory + represented by ELF file representation. */ +extern Elf_Data *elf32_xlatetof (Elf_Data *__dest, const Elf_Data *__src, + unsigned int __encode); +/* Same for 64 bit class. */ +extern Elf_Data *elf64_xlatetof (Elf_Data *__dest, const Elf_Data *__src, + unsigned int __encode); + + +/* Return error code of last failing function call. This value is kept + separately for each thread. */ +extern int elf_errno (void); + +/* Return error string for ERROR. If ERROR is zero, return error string + for most recent error or NULL is none occurred. If ERROR is -1 the + behaviour is similar to the last case except that not NULL but a legal + string is returned. */ +extern const char *elf_errmsg (int __error); + + +/* Coordinate ELF library and application versions. */ +extern unsigned int elf_version (unsigned int __version); + +/* Set fill bytes used to fill holes in data structures. */ +extern void elf_fill (int __fill); + +/* Compute hash value. */ +extern unsigned long int elf_hash (const char *__string) + __attribute__ ((__pure__)); + + +/* Compute simple checksum from permanent parts of the ELF file. */ +extern long int elf32_checksum (Elf *__elf); +/* Similar but this time the binary calls is ELFCLASS64. */ +extern long int elf64_checksum (Elf *__elf); + +#ifdef __cplusplus +} +#endif + +#endif /* libelf.h */ |