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+/* Internal interfaces for libelf.
+ Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2005 Red Hat, Inc.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 1998.
+
+ 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 _LIBELFP_H
+#define _LIBELFP_H 1
+
+#include <ar.h>
+#include <gelf.h>
+#include <stdint.h>
+
+/* gettext helper macros. */
+#define _(Str) dgettext ("libelf", Str)
+
+
+/* Helper Macros to write 32 bit and 64 bit functions. */
+#define __elfw2_(Bits, Name) __elf##Bits##_##Name
+#define elfw2_(Bits, Name) elf##Bits##_##Name
+#define ElfW2_(Bits, Name) Elf##Bits##_##Name
+#define ELFW2_(Bits, Name) ELF##Bits##_##Name
+#define ELFW_(Name, Bits) Name##Bits
+#define __elfw2(Bits, Name) __elfw2_(Bits, Name)
+#define elfw2(Bits, Name) elfw2_(Bits, Name)
+#define ElfW2(Bits, Name) ElfW2_(Bits, Name)
+#define ELFW2(Bits, Name) ELFW2_(Bits, Name)
+#define ELFW(Name, Bits) ELFW_(Name, Bits)
+
+
+/* Sizes of the external types, for 32 bits objects. */
+#define ELF32_FSZ_ADDR 4
+#define ELF32_FSZ_OFF 4
+#define ELF32_FSZ_HALF 2
+#define ELF32_FSZ_WORD 4
+#define ELF32_FSZ_SWORD 4
+#define ELF32_FSZ_XWORD 8
+#define ELF32_FSZ_SXWORD 8
+
+/* Same for 64 bits objects. */
+#define ELF64_FSZ_ADDR 8
+#define ELF64_FSZ_OFF 8
+#define ELF64_FSZ_HALF 2
+#define ELF64_FSZ_WORD 4
+#define ELF64_FSZ_SWORD 4
+#define ELF64_FSZ_XWORD 8
+#define ELF64_FSZ_SXWORD 8
+
+
+/* This is an extension of the ELF_F_* enumeration. The values here are
+ not part of the library interface, they are only used internally. */
+enum
+{
+ ELF_F_MMAPPED = 0x40,
+ ELF_F_MALLOCED = 0x80,
+ ELF_F_FILEDATA = 0x100
+};
+
+
+/* Get definition of all the external types. */
+#include "exttypes.h"
+
+
+/* Error values. */
+enum
+{
+ ELF_E_NOERROR = 0,
+ ELF_E_UNKNOWN_ERROR,
+ ELF_E_UNKNOWN_VERSION,
+ ELF_E_UNKNOWN_TYPE,
+ ELF_E_INVALID_HANDLE,
+ ELF_E_SOURCE_SIZE,
+ ELF_E_DEST_SIZE,
+ ELF_E_INVALID_ENCODING,
+ ELF_E_NOMEM,
+ ELF_E_INVALID_FILE,
+ ELF_E_INVALID_OP,
+ ELF_E_NO_VERSION,
+ ELF_E_INVALID_CMD,
+ ELF_E_RANGE,
+ ELF_E_ARCHIVE_FMAG,
+ ELF_E_INVALID_ARCHIVE,
+ ELF_E_NO_ARCHIVE,
+ ELF_E_NO_INDEX,
+ ELF_E_READ_ERROR,
+ ELF_E_WRITE_ERROR,
+ ELF_E_INVALID_CLASS,
+ ELF_E_INVALID_INDEX,
+ ELF_E_INVALID_OPERAND,
+ ELF_E_INVALID_SECTION,
+ ELF_E_INVALID_COMMAND,
+ ELF_E_WRONG_ORDER_EHDR,
+ ELF_E_FD_DISABLED,
+ ELF_E_FD_MISMATCH,
+ ELF_E_OFFSET_RANGE,
+ ELF_E_NOT_NUL_SECTION,
+ ELF_E_DATA_MISMATCH,
+ ELF_E_INVALID_SECTION_HEADER,
+ ELF_E_INVALID_DATA,
+ ELF_E_DATA_ENCODING,
+ ELF_E_SECTION_TOO_SMALL,
+ ELF_E_INVALID_ALIGN,
+ ELF_E_INVALID_SHENTSIZE,
+ ELF_E_UPDATE_RO,
+ ELF_E_NOFILE,
+ ELF_E_GROUP_NOT_REL,
+ ELF_E_INVALID_PHDR,
+ ELF_E_NO_PHDR,
+ /* Keep this as the last entry. */
+ ELF_E_NUM
+};
+
+
+/* The visible `Elf_Data' type is not sufficent for some operations due
+ to a misdesigned interface. Extend it for internal purposes. */
+typedef struct
+{
+ Elf_Data d;
+ Elf_Scn *s;
+} Elf_Data_Scn;
+
+
+/* List of `Elf_Data' descriptors. This is what makes up the section
+ contents. */
+typedef struct Elf_Data_List
+{
+ /* `data' *must* be the first element in the struct. */
+ Elf_Data_Scn data;
+ struct Elf_Data_List *next;
+ int flags;
+} Elf_Data_List;
+
+
+/* Descriptor for ELF section. */
+struct Elf_Scn
+{
+ /* We have to distinguish several different situations:
+
+ 1. the section is user created. Therefore there is no file or memory
+ region to read the data from. Here we have two different subcases:
+
+ a) data was not yet added (before the first `elf_newdata' call)
+
+ b) at least one data set is available
+
+ 2. this is a section from a file/memory region. We have to read the
+ current content in one data block if we have to. But we don't
+ read the data until it is necessary. So we have the subcases:
+
+ a) the section in the file has size zero (for whatever reason)
+
+ b) the data of the file is not (yet) read
+
+ c) the data is read and available.
+
+ In addition to this we have different data sets, the raw and the converted
+ data. This distinction only exists for the data read from the file.
+ All user-added data set (all but the first when read from the file or
+ all of them for user-create sections) are the same in both formats.
+ We don't create the converted data before it is necessary.
+
+ The `data_read' element signals whether data is available in the
+ raw format.
+
+ If there is data from the file/memory region or if read one data
+ set is added the `rawdata_list_read' pointer in non-NULL and points
+ to the last filled data set. `raw_datalist_rear' is therefore NULL
+ only if there is no data set at all.
+
+ This so far allows to distinguish all but two cases (given that the
+ `rawdata_list' and `data_list' entries are initialized to zero) is
+ between not yet loaded data from the file/memory region and a section
+ with zero size and type ELF_T_BYTE. */
+ Elf_Data_List data_list; /* List of data buffers. */
+ Elf_Data_List *data_list_rear; /* Pointer to the rear of the data list. */
+
+ Elf_Data_Scn rawdata; /* Uninterpreted data of the section. */
+
+ int data_read; /* Nonzero if the section was created by the
+ user or if the data from the file/memory
+ is read. */
+
+ size_t index; /* Index of this section. */
+ struct Elf *elf; /* The underlying ELF file. */
+
+ union
+ {
+ Elf32_Shdr *e32; /* Pointer to 32bit section header. */
+ Elf64_Shdr *e64; /* Pointer to 64bit section header. */
+ } shdr;
+
+ unsigned int shdr_flags; /* Section header modified? */
+ unsigned int flags; /* Section changed in size? */
+
+ char *rawdata_base; /* The unmodified data of the section. */
+ char *data_base; /* The converted data of the section. */
+
+ struct Elf_ScnList *list; /* Pointer the the section list element the
+ data is in. */
+};
+
+
+/* List of section. */
+typedef struct Elf_ScnList
+{
+ unsigned int cnt; /* Number of elements of 'data' used. */
+ unsigned int max; /* Number of elements of 'data' allocated. */
+ struct Elf_ScnList *next; /* Next block of sections. */
+ struct Elf_Scn data[0]; /* Section data. */
+} Elf_ScnList;
+
+
+/* The ELF descriptor. */
+struct Elf
+{
+ /* What kind of file is underneath (ELF file, archive...). */
+ Elf_Kind kind;
+
+ /* Command used to create this descriptor. */
+ Elf_Cmd cmd;
+
+ /* The binary class. */
+ unsigned int class;
+
+ /* The used file descriptor. -1 if not available anymore. */
+ int fildes;
+
+ /* Offset in the archive this file starts or zero. */
+ off_t start_offset;
+
+ /* Size of the file in the archive or the entire file size, or ~0
+ for an (yet) unknown size. */
+ size_t maximum_size;
+
+ /* Address to which the file was mapped. NULL if not mapped. */
+ void *map_address;
+
+ /* Describes the way the memory was allocated and if the dirty bit is
+ signalled it means that the whole file has to be rewritten since
+ the layout changed. */
+ int flags;
+
+ /* When created for an archive member this points to the descriptor
+ for the archive. */
+ Elf *parent;
+
+ /* Lock to handle multithreaded programs. */
+ rwlock_define (,lock);
+
+ /* Reference counting for the descriptor. */
+ int ref_count;
+
+ struct Elf *next; /* Used in list of archive descriptors. */
+
+ union
+ {
+ struct
+ {
+ int ehdr_flags; /* Flags (dirty) for ELF header. */
+ int phdr_flags; /* Flags (dirty|malloc) for program header. */
+ int shdr_malloced; /* Nonzero if shdr array was allocated. */
+
+ /* The next fields are only useful when testing for ==/!= NULL. */
+ void *ehdr;
+ void *shdr;
+ void *phdr;
+
+ Elf_ScnList *scns_last; /* Last element in the section list.
+ If NULL the data has not yet been
+ read from the file. */
+ unsigned int scnincr; /* Number of sections allocate the last
+ time. */
+ off64_t sizestr_offset; /* Offset of the size string in the parent
+ if this is an archive member. */
+ } elf;
+
+ struct
+ {
+ int ehdr_flags; /* Flags (dirty) for ELF header. */
+ int phdr_flags; /* Flags (dirty|malloc) for program header. */
+ int shdr_malloced; /* Nonzero if shdr array was allocated. */
+
+ Elf32_Ehdr *ehdr; /* Pointer to the ELF header. This is
+ never malloced. */
+ Elf32_Shdr *shdr; /* Used when reading from a file. */
+ Elf32_Phdr *phdr; /* Pointer to the program header array. */
+ Elf_ScnList *scns_last; /* Last element in the section list.
+ If NULL the data has not yet been
+ read from the file. */
+ unsigned int scnincr; /* Number of sections allocate the last
+ time. */
+ off64_t sizestr_offset; /* Offset of the size string in the parent
+ if this is an archive member. */
+ Elf32_Ehdr ehdr_mem; /* Memory used for ELF header when not
+ mmaped. */
+ char __e32scnspad[sizeof (Elf64_Ehdr) - sizeof (Elf32_Ehdr)];
+
+ /* The section array. */
+ Elf_ScnList scns;
+ } elf32;
+
+ struct
+ {
+ int ehdr_flags; /* Flags (dirty) for ELF header. */
+ int phdr_flags; /* Flags (dirty|malloc) for program header. */
+ int shdr_malloced; /* Nonzero if shdr array was allocated. */
+
+ Elf64_Ehdr *ehdr; /* Pointer to the ELF header. This is
+ never malloced. */
+ Elf64_Shdr *shdr; /* Used when reading from a file. */
+ Elf64_Phdr *phdr; /* Pointer to the program header array. */
+ Elf_ScnList *scns_last; /* Last element in the section list.
+ If NULL the data has not yet been
+ read from the file. */
+ unsigned int scnincr; /* Number of sections allocate the last
+ time. */
+ off64_t sizestr_offset; /* Offset of the size string in the parent
+ if this is an archive member. */
+ Elf64_Ehdr ehdr_mem; /* Memory used for ELF header when not
+ mmaped. */
+
+ /* The section array. */
+ Elf_ScnList scns;
+ } elf64;
+
+ struct
+ {
+ int has_index; /* Set when file has index. 0 means
+ undecided, > 0 means it has one. */
+ Elf_Arsym *ar_sym; /* Symbol table returned by elf_getarsym. */
+ size_t ar_sym_num; /* Number of entries in `ar_sym'. */
+ char *long_names; /* If no index is available but long names
+ are used this elements points to the data.*/
+ size_t long_names_len; /* Length of the long name table. */
+ off_t offset; /* Offset in file we are currently at.
+ elf_next() advances this to the next
+ member of the archive. */
+ Elf_Arhdr elf_ar_hdr; /* Structure returned by 'elf_getarhdr'. */
+ struct ar_hdr ar_hdr; /* Header read from file. */
+ char ar_name[16]; /* NUL terminated ar_name of elf_ar_hdr. */
+ char raw_name[17]; /* This is a buffer for the NUL terminated
+ named raw_name used in the elf_ar_hdr. */
+ struct Elf *children; /* List of all descriptors for this archive. */
+ } ar;
+ } state;
+
+ /* There absolutely never must be anything following the union. */
+};
+
+
+/* Type of the conversion functions. These functions will convert the
+ byte order. */
+typedef void (*xfct_t) (void *, const void *, size_t, int);
+
+/* The table with the function pointers. */
+extern const xfct_t __elf_xfctstom[EV_NUM - 1][EV_NUM - 1][ELFCLASSNUM - 1][ELF_T_NUM] attribute_hidden;
+extern const xfct_t __elf_xfctstof[EV_NUM - 1][EV_NUM - 1][ELFCLASSNUM - 1][ELF_T_NUM] attribute_hidden;
+
+
+/* Array with sizes of the external types indexed by ELF version, binary
+ class, and type. */
+extern const size_t __libelf_type_sizes[EV_NUM - 1][ELFCLASSNUM - 1][ELF_T_NUM] attribute_hidden;
+/* We often have to access the size for a type in the current version. */
+#if EV_NUM != 2
+# define elf_typesize(class,type,n) \
+ elfw2(class,fsize) (type, n, __libelf_version)
+#else
+# define elf_typesize(class,type,n) \
+ (__libelf_type_sizes[EV_CURRENT - 1][ELFW(ELFCLASS,class) - 1][type] * n)
+#endif
+
+/* Currently selected version of the ELF specification. */
+extern unsigned int __libelf_version attribute_hidden;
+
+/* The byte value used for filling gaps. */
+extern int __libelf_fill_byte attribute_hidden;
+
+/* Nonzero if the version was set. */
+extern int __libelf_version_initialized attribute_hidden;
+
+
+/* The libelf API does not have such a function but it is still useful.
+ Get the memory size for the given type.
+
+ These functions cannot be marked internal since they are aliases
+ of the export elfXX_fsize functions.*/
+extern size_t __elf32_msize (Elf_Type __type, size_t __count,
+ unsigned int __version);
+extern size_t __elf64_msize (Elf_Type __type, size_t __count,
+ unsigned int __version);
+
+
+/* Create Elf descriptor from memory image. */
+extern Elf *__libelf_read_mmaped_file (int fildes, void *map_address,
+ off_t offset, size_t maxsize,
+ Elf_Cmd cmd, Elf *parent)
+ internal_function;
+
+/* Set error value. */
+extern void __libelf_seterrno (int value) internal_function;
+
+/* Get the next archive header. */
+extern int __libelf_next_arhdr (Elf *elf) internal_function;
+
+/* Read all of the file associated with the descriptor. */
+extern char *__libelf_readall (Elf *elf) internal_function;
+
+/* Read the complete section table and convert the byte order if necessary. */
+extern int __libelf_readsections (Elf *elf) internal_function;
+
+/* Store the information for the raw data in the `rawdata_list' element. */
+extern int __libelf_set_rawdata (Elf_Scn *scn) internal_function;
+
+
+/* Helper functions for elf_update. */
+extern off_t __elf32_updatenull (Elf *elf, int *change_bop, size_t shnum)
+ internal_function;
+extern off_t __elf64_updatenull (Elf *elf, int *change_bop, size_t shnum)
+ internal_function;
+
+extern int __elf32_updatemmap (Elf *elf, int change_bo, size_t shnum)
+ internal_function;
+extern int __elf64_updatemmap (Elf *elf, int change_bo, size_t shnum)
+ internal_function;
+extern int __elf32_updatefile (Elf *elf, int change_bo, size_t shnum)
+ internal_function;
+extern int __elf64_updatefile (Elf *elf, int change_bo, size_t shnum)
+ internal_function;
+
+
+/* Alias for exported functions to avoid PLT entries. */
+extern int __elf_end_internal (Elf *__elf);
+extern Elf *__elf_begin_internal (int __fildes, Elf_Cmd __cmd, Elf *__ref)
+ attribute_hidden;
+extern Elf32_Ehdr *__elf32_getehdr_internal (Elf *__elf) attribute_hidden;
+extern Elf64_Ehdr *__elf64_getehdr_internal (Elf *__elf) attribute_hidden;
+extern Elf32_Ehdr *__elf32_newehdr_internal (Elf *__elf) attribute_hidden;
+extern Elf64_Ehdr *__elf64_newehdr_internal (Elf *__elf) attribute_hidden;
+extern Elf32_Phdr *__elf32_getphdr_internal (Elf *__elf) attribute_hidden;
+extern Elf64_Phdr *__elf64_getphdr_internal (Elf *__elf) attribute_hidden;
+extern Elf32_Phdr *__elf32_newphdr_internal (Elf *__elf, size_t __cnt)
+ attribute_hidden;
+extern Elf64_Phdr *__elf64_newphdr_internal (Elf *__elf, size_t __cnt)
+ attribute_hidden;
+extern int __elf_getshnum_internal (Elf *__elf, size_t *__dst)
+ attribute_hidden;
+extern int __elf_getshstrndx_internal (Elf *__elf, size_t *__dst)
+ attribute_hidden;
+extern Elf32_Shdr *__elf32_getshdr_internal (Elf_Scn *__scn) attribute_hidden;
+extern Elf64_Shdr *__elf64_getshdr_internal (Elf_Scn *__scn) attribute_hidden;
+extern Elf_Scn *__elf_getscn_internal (Elf *__elf, size_t __index)
+ attribute_hidden;
+extern Elf_Scn *__elf_nextscn_internal (Elf *__elf, Elf_Scn *__scn)
+ attribute_hidden;
+extern Elf_Data *__elf_getdata_internal (Elf_Scn *__scn, Elf_Data *__data)
+ attribute_hidden;
+extern Elf_Data *__elf_rawdata_internal (Elf_Scn *__scn, Elf_Data *__data)
+ attribute_hidden;
+extern char *__elf_strptr_internal (Elf *__elf, size_t __index,
+ size_t __offset) attribute_hidden;
+extern Elf_Data *__elf32_xlatetom_internal (Elf_Data *__dest,
+ const Elf_Data *__src,
+ unsigned int __encode)
+ attribute_hidden;
+extern Elf_Data *__elf64_xlatetom_internal (Elf_Data *__dest,
+ const Elf_Data *__src,
+ unsigned int __encode)
+ attribute_hidden;
+extern Elf_Data *__elf32_xlatetof_internal (Elf_Data *__dest,
+ const Elf_Data *__src,
+ unsigned int __encode)
+ attribute_hidden;
+extern Elf_Data *__elf64_xlatetof_internal (Elf_Data *__dest,
+ const Elf_Data *__src,
+ unsigned int __encode)
+ attribute_hidden;
+extern unsigned int __elf_version_internal (unsigned int __version)
+ attribute_hidden;
+extern unsigned long int __elf_hash_internal (const char *__string)
+ __attribute__ ((__pure__, visibility ("hidden")));
+extern long int __elf32_checksum_internal (Elf *__elf) attribute_hidden;
+extern long int __elf64_checksum_internal (Elf *__elf) attribute_hidden;
+
+
+extern GElf_Ehdr *__gelf_getehdr_internal (Elf *__elf, GElf_Ehdr *__dest);
+extern size_t __gelf_fsize_internal (Elf *__elf, Elf_Type __type,
+ size_t __count, unsigned int __version)
+ attribute_hidden;
+extern GElf_Shdr *__gelf_getshdr_internal (Elf_Scn *__scn, GElf_Shdr *__dst)
+ attribute_hidden;
+extern GElf_Sym *__gelf_getsym_internal (Elf_Data *__data, int __ndx,
+ GElf_Sym *__dst) attribute_hidden;
+
+
+extern uint32_t __libelf_crc32 (uint32_t crc, unsigned char *buf, size_t len)
+ attribute_hidden;
+
+
+/* We often have to update a flag iff a value changed. Make this
+ convenient. None of the parameters must have a side effect. */
+#ifdef __GNUC__
+# define update_if_changed(var, exp, flag) \
+ do { \
+ __typeof__ (var) *_var = &(var); \
+ __typeof__ (exp) _exp = (exp); \
+ if (*_var != _exp) \
+ { \
+ *_var = _exp; \
+ (flag) |= ELF_F_DIRTY; \
+ } \
+ } while (0)
+#else
+# define update_if_changed(var, exp, flag) \
+ do { \
+ if ((var) != (exp)) \
+ { \
+ (var) = (exp); \
+ (flag) |= ELF_F_DIRTY; \
+ } \
+ } while (0)
+#endif
+
+#endif /* libelfP.h */
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