source: rtems-tools/rtemstoolkit/elftoolchain/libelf/_libelf.h @ 771e7f1

5
Last change on this file since 771e7f1 was 771e7f1, checked in by Chris Johns <chrisj@…>, on 04/30/18 at 04:20:32

rtemstoolkit: Update elftoolchain to the latest code.

The update is taken from:

​https://svn.code.sf.net/p/elftoolchain/code/trunk

Update #3417
  • Property mode set to 100644
File size: 7.8 KB
Line 
1/*-
2 * Copyright (c) 2006,2008-2011 Joseph Koshy
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $Id: _libelf.h 3174 2015-03-27 17:13:41Z emaste $
27 */
28
29#ifndef __LIBELF_H_
30#define __LIBELF_H_
31
32#include <sys/queue.h>
33
34#include "_libelf_config.h"
35
36#include "_elftc.h"
37
38/*
39 * Library-private data structures.
40 */
41
42#define LIBELF_MSG_SIZE 256
43
44struct _libelf_globals {
45        int             libelf_arch;
46        unsigned int    libelf_byteorder;
47        int             libelf_class;
48        int             libelf_error;
49        int             libelf_fillchar;
50        unsigned int    libelf_version;
51        unsigned char   libelf_msg[LIBELF_MSG_SIZE];
52};
53
54extern struct _libelf_globals _libelf;
55
56#define LIBELF_PRIVATE(N)       (_libelf.libelf_##N)
57
58#define LIBELF_ELF_ERROR_MASK                   0xFF
59#define LIBELF_OS_ERROR_SHIFT                   8
60
61#define LIBELF_ERROR(E, O) (((E) & LIBELF_ELF_ERROR_MASK) |     \
62        ((O) << LIBELF_OS_ERROR_SHIFT))
63
64#define LIBELF_SET_ERROR(E, O) do {                                     \
65                LIBELF_PRIVATE(error) = LIBELF_ERROR(ELF_E_##E, (O));   \
66        } while (0)
67
68#define LIBELF_ADJUST_AR_SIZE(S)        (((S) + 1U) & ~1U)
69
70/*
71 * Flags for library internal use.  These use the upper 16 bits of the
72 * `e_flags' field.
73 */
74#define LIBELF_F_API_MASK       0x00FFFFU  /* Flags defined by the API. */
75#define LIBELF_F_AR_HEADER      0x010000U  /* translated header available */
76#define LIBELF_F_AR_VARIANT_SVR4 0x020000U /* BSD style ar(1) archive */
77#define LIBELF_F_DATA_MALLOCED  0x040000U /* whether data was malloc'ed */
78#define LIBELF_F_RAWFILE_MALLOC 0x080000U /* whether e_rawfile was malloc'ed */
79#define LIBELF_F_RAWFILE_MMAP   0x100000U /* whether e_rawfile was mmap'ed */
80#define LIBELF_F_SHDRS_LOADED   0x200000U /* whether all shdrs were read in */
81#define LIBELF_F_SPECIAL_FILE   0x400000U /* non-regular file */
82
83struct _Elf {
84        int             e_activations;  /* activation count */
85        unsigned int    e_byteorder;    /* ELFDATA* */
86        int             e_class;        /* ELFCLASS*  */
87        Elf_Cmd         e_cmd;          /* ELF_C_* used at creation time */
88        int             e_fd;           /* associated file descriptor */
89        unsigned int    e_flags;        /* ELF_F_* & LIBELF_F_* flags */
90        Elf_Kind        e_kind;         /* ELF_K_* */
91        Elf             *e_parent;      /* non-NULL for archive members */
92        unsigned char   *e_rawfile;     /* uninterpreted bytes */
93        size_t          e_rawsize;      /* size of uninterpreted bytes */
94        unsigned int    e_version;      /* file version */
95
96        /*
97         * Header information for archive members.  See the
98         * LIBELF_F_AR_HEADER flag.
99         */
100        union {
101                Elf_Arhdr       *e_arhdr;       /* translated header */
102                unsigned char   *e_rawhdr;      /* untranslated header */
103        } e_hdr;
104
105        union {
106                struct {                /* ar(1) archives */
107                        off_t   e_next; /* set by elf_rand()/elf_next() */
108                        int     e_nchildren;
109                        unsigned char *e_rawstrtab; /* file name strings */
110                        size_t  e_rawstrtabsz;
111                        unsigned char *e_rawsymtab;     /* symbol table */
112                        size_t  e_rawsymtabsz;
113                        Elf_Arsym *e_symtab;
114                        size_t  e_symtabsz;
115                } e_ar;
116                struct {                /* regular ELF files */
117                        union {
118                                Elf32_Ehdr *e_ehdr32;
119                                Elf64_Ehdr *e_ehdr64;
120                        } e_ehdr;
121                        union {
122                                Elf32_Phdr *e_phdr32;
123                                Elf64_Phdr *e_phdr64;
124                        } e_phdr;
125                        STAILQ_HEAD(, _Elf_Scn) e_scn;  /* section list */
126                        size_t  e_nphdr;        /* number of Phdr entries */
127                        size_t  e_nscn;         /* number of sections */
128                        size_t  e_strndx;       /* string table section index */
129                } e_elf;
130        } e_u;
131};
132
133/*
134 * The internal descriptor wrapping the "Elf_Data" type.
135 */
136struct _Libelf_Data {
137        Elf_Data        d_data;         /* The exported descriptor. */
138        Elf_Scn         *d_scn;         /* The containing section */
139        unsigned int    d_flags;
140        STAILQ_ENTRY(_Libelf_Data) d_next;
141};
142
143struct _Elf_Scn {
144        union {
145                Elf32_Shdr      s_shdr32;
146                Elf64_Shdr      s_shdr64;
147        } s_shdr;
148        STAILQ_HEAD(, _Libelf_Data) s_data;     /* translated data */
149        STAILQ_HEAD(, _Libelf_Data) s_rawdata;  /* raw data */
150        STAILQ_ENTRY(_Elf_Scn) s_next;
151        struct _Elf     *s_elf;         /* parent ELF descriptor */
152        unsigned int    s_flags;        /* flags for the section as a whole */
153        size_t          s_ndx;          /* index# for this section */
154        uint64_t        s_offset;       /* managed by elf_update() */
155        uint64_t        s_rawoff;       /* original offset in the file */
156        uint64_t        s_size;         /* managed by elf_update() */
157};
158
159
160enum {
161        ELF_TOFILE,
162        ELF_TOMEMORY
163};
164
165
166/*
167 * The LIBELF_COPY macros are used to copy fields from a GElf_*
168 * structure to their 32-bit counterparts, while checking for out of
169 * range values.
170 *
171 * - LIBELF_COPY_U32 :: copy an unsigned 32 bit field.
172 * - LIBELF_COPY_S32 :: copy a signed 32 bit field.
173 */
174
175#define LIBELF_COPY_U32(DST, SRC, NAME) do {                    \
176                if ((SRC)->NAME > UINT32_MAX) {                 \
177                        LIBELF_SET_ERROR(RANGE, 0);             \
178                        return (0);                             \
179                }                                               \
180                (DST)->NAME = (SRC)->NAME & 0xFFFFFFFFU;        \
181        } while (0)
182
183#define LIBELF_COPY_S32(DST, SRC, NAME) do {                    \
184                if ((SRC)->NAME > INT32_MAX ||                  \
185                    (SRC)->NAME < INT32_MIN) {                  \
186                        LIBELF_SET_ERROR(RANGE, 0);             \
187                        return (0);                             \
188                }                                               \
189                (DST)->NAME = (int32_t) (SRC)->NAME;            \
190        } while (0)
191
192
193/*
194 * Function Prototypes.
195 */
196
197#ifdef __cplusplus
198extern "C" {
199#endif
200struct _Libelf_Data *_libelf_allocate_data(Elf_Scn *_s);
201Elf     *_libelf_allocate_elf(void);
202Elf_Scn *_libelf_allocate_scn(Elf *_e, size_t _ndx);
203Elf_Arhdr *_libelf_ar_gethdr(Elf *_e);
204Elf     *_libelf_ar_open(Elf *_e, int _reporterror);
205Elf     *_libelf_ar_open_member(int _fd, Elf_Cmd _c, Elf *_ar);
206Elf_Arsym *_libelf_ar_process_bsd_symtab(Elf *_ar, size_t *_dst);
207Elf_Arsym *_libelf_ar_process_svr4_symtab(Elf *_ar, size_t *_dst);
208long     _libelf_checksum(Elf *_e, int _elfclass);
209void    *_libelf_ehdr(Elf *_e, int _elfclass, int _allocate);
210unsigned int _libelf_falign(Elf_Type _t, int _elfclass);
211size_t  _libelf_fsize(Elf_Type _t, int _elfclass, unsigned int _version,
212    size_t count);
213int     (*_libelf_get_translator(Elf_Type _t, int _direction, int _elfclass))
214            (unsigned char *_dst, size_t dsz, unsigned char *_src,
215             size_t _cnt, int _byteswap);
216void    *_libelf_getphdr(Elf *_e, int _elfclass);
217void    *_libelf_getshdr(Elf_Scn *_scn, int _elfclass);
218void    _libelf_init_elf(Elf *_e, Elf_Kind _kind);
219int     _libelf_load_section_headers(Elf *e, void *ehdr);
220unsigned int _libelf_malign(Elf_Type _t, int _elfclass);
221Elf     *_libelf_memory(unsigned char *_image, size_t _sz, int _reporterror);
222size_t  _libelf_msize(Elf_Type _t, int _elfclass, unsigned int _version);
223void    *_libelf_newphdr(Elf *_e, int _elfclass, size_t _count);
224Elf     *_libelf_open_object(int _fd, Elf_Cmd _c, int _reporterror);
225struct _Libelf_Data *_libelf_release_data(struct _Libelf_Data *_d);
226Elf     *_libelf_release_elf(Elf *_e);
227Elf_Scn *_libelf_release_scn(Elf_Scn *_s);
228int     _libelf_setphnum(Elf *_e, void *_eh, int _elfclass, size_t _phnum);
229int     _libelf_setshnum(Elf *_e, void *_eh, int _elfclass, size_t _shnum);
230int     _libelf_setshstrndx(Elf *_e, void *_eh, int _elfclass,
231    size_t _shstrndx);
232Elf_Data *_libelf_xlate(Elf_Data *_d, const Elf_Data *_s,
233    unsigned int _encoding, int _elfclass, int _direction);
234int     _libelf_xlate_shtype(uint32_t _sht);
235#ifdef __cplusplus
236}
237#endif
238
239#endif  /* __LIBELF_H_ */
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