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Current Path: /usr/src/contrib/elftoolchain/libelf

usr / src / contrib / elftoolchain / libelf /

📁 ..
📄 Makefile(3.83 KB)
📄 Version.map(1.49 KB)
📄 _libelf.h(8.22 KB)
📄 _libelf_ar.h(2.25 KB)
📄 _libelf_config.h(5.2 KB)
📄 elf.3(17.82 KB)
📄 elf.c(1.64 KB)
📄 elf_begin.3(7.24 KB)
📄 elf_begin.c(2.55 KB)
📄 elf_cntl.3(3.11 KB)
📄 elf_cntl.c(1.81 KB)
📄 elf_data.c(7.25 KB)
📄 elf_end.3(2.38 KB)
📄 elf_end.c(2.61 KB)
📄 elf_errmsg.3(3.5 KB)
📄 elf_errmsg.c(2.99 KB)
📄 elf_errno.c(1.57 KB)
📄 elf_fill.3(1.94 KB)
📄 elf_fill.c(1.5 KB)
📄 elf_flag.c(4.46 KB)
📄 elf_flagdata.3(5.98 KB)
📄 elf_getarhdr.3(3 KB)
📄 elf_getarhdr.c(1.65 KB)
📄 elf_getarsym.3(3.64 KB)
📄 elf_getarsym.c(1.96 KB)
📄 elf_getbase.3(2.29 KB)
📄 elf_getbase.c(1.68 KB)
📄 elf_getdata.3(6.26 KB)
📄 elf_getident.3(2.58 KB)
📄 elf_getident.c(1.98 KB)
📄 elf_getphdrnum.3(2.68 KB)
📄 elf_getphnum.3(2.78 KB)
📄 elf_getscn.3(4.22 KB)
📄 elf_getshdrnum.3(2.5 KB)
📄 elf_getshdrstrndx.3(2.62 KB)
📄 elf_getshnum.3(2.57 KB)
📄 elf_getshstrndx.3(2.89 KB)
📄 elf_hash.3(2.13 KB)
📄 elf_hash.c(1.76 KB)
📄 elf_kind.3(2.19 KB)
📄 elf_kind.c(1.6 KB)
📄 elf_memory.3(3.47 KB)
📄 elf_memory.c(1.72 KB)
📄 elf_next.3(2.81 KB)
📄 elf_next.c(2.55 KB)
📄 elf_open.3(3.41 KB)
📄 elf_open.c(2.01 KB)
📄 elf_phnum.c(1.98 KB)
📄 elf_rand.3(3.1 KB)
📄 elf_rand.c(2.14 KB)
📄 elf_rawfile.3(2.38 KB)
📄 elf_rawfile.c(1.73 KB)
📄 elf_scn.c(6.17 KB)
📄 elf_shnum.c(1.98 KB)
📄 elf_shstrndx.c(2.32 KB)
📄 elf_strptr.3(3.3 KB)
📄 elf_strptr.c(3.58 KB)
📄 elf_types.m4(6.35 KB)
📄 elf_update.3(10.84 KB)
📄 elf_update.c(29.37 KB)
📄 elf_version.3(2.91 KB)
📄 elf_version.c(1.72 KB)
📄 gelf.3(6.43 KB)
📄 gelf.h(5 KB)
📄 gelf_cap.c(3.64 KB)
📄 gelf_chdr.c(2.31 KB)
📄 gelf_checksum.3(3.28 KB)
📄 gelf_checksum.c(1.81 KB)
📄 gelf_dyn.c(3.68 KB)
📄 gelf_ehdr.c(4.1 KB)
📄 gelf_fsize.3(2.83 KB)
📄 gelf_fsize.c(1.95 KB)
📄 gelf_getcap.3(3.55 KB)
📄 gelf_getchdr.3(3.24 KB)
📄 gelf_getclass.3(2 KB)
📄 gelf_getclass.c(1.52 KB)
📄 gelf_getdyn.3(3.59 KB)
📄 gelf_getehdr.3(3.47 KB)
📄 gelf_getmove.3(3.61 KB)
📄 gelf_getphdr.3(3.91 KB)
📄 gelf_getrel.3(3.55 KB)
📄 gelf_getrela.3(3.59 KB)
📄 gelf_getshdr.3(3.18 KB)
📄 gelf_getsym.3(3.68 KB)
📄 gelf_getsyminfo.3(3.47 KB)
📄 gelf_getsymshndx.3(4.27 KB)
📄 gelf_mips64el.c(2.65 KB)
📄 gelf_move.c(3.93 KB)
📄 gelf_newehdr.3(5.06 KB)
📄 gelf_newphdr.3(3.78 KB)
📄 gelf_phdr.c(4.19 KB)
📄 gelf_rel.c(4.16 KB)
📄 gelf_rela.c(4.29 KB)
📄 gelf_shdr.c(3.43 KB)
📄 gelf_sym.c(3.95 KB)
📄 gelf_syminfo.c(3.75 KB)
📄 gelf_symshndx.c(3.55 KB)
📄 gelf_update_ehdr.3(3.63 KB)
📄 gelf_xlate.c(2.67 KB)
📄 gelf_xlatetof.3(7.41 KB)
📄 libelf.h(7.72 KB)
📄 libelf_align.c(3.86 KB)
📄 libelf_allocate.c(4 KB)
📄 libelf_ar.c(13.03 KB)
📄 libelf_ar_util.c(8.33 KB)
📄 libelf_chdr.c(2.86 KB)
📄 libelf_checksum.c(2.81 KB)
📄 libelf_convert.m4(28.16 KB)
📄 libelf_data.c(3.18 KB)
📄 libelf_ehdr.c(5.99 KB)
📄 libelf_elfmachine.c(1.94 KB)
📄 libelf_extended.c(3.38 KB)
📄 libelf_fsize.m4(4.35 KB)
📄 libelf_memory.c(2.89 KB)
📄 libelf_msize.m4(3.2 KB)
📄 libelf_open.c(5.49 KB)
📄 libelf_phdr.c(4.04 KB)
📄 libelf_shdr.c(1.79 KB)
📄 libelf_xlate.c(4.25 KB)
📄 os.FreeBSD.mk(182 B)
📄 os.Linux.mk(761 B)
📄 os.NetBSD.mk(128 B)

Editing: elf_data.c

/*-
 * Copyright (c) 2006,2008,2011 Joseph Koshy
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <assert.h>
#include <errno.h>
#include <libelf.h>
#include <stdint.h>
#include <stdlib.h>

#include "_libelf.h"

ELFTC_VCSID("$Id: elf_data.c 3732 2019-04-22 11:08:38Z jkoshy $");

Elf_Data *
elf_getdata(Elf_Scn *s, Elf_Data *ed)
{
	Elf *e;
	unsigned int sh_type;
	int elfclass, elftype;
	size_t count, fsz, msz;
	struct _Libelf_Data *d;
	uint64_t sh_align, sh_offset, sh_size, raw_size;
	_libelf_translator_function *xlate;

d = (struct _Libelf_Data *) ed;

if (s == NULL || (e = s->s_elf) == NULL ||
	    (d != NULL && s != d->d_scn)) {
		LIBELF_SET_ERROR(ARGUMENT, 0);
		return (NULL);
	}

assert(e->e_kind == ELF_K_ELF);

if (d == NULL && (d = STAILQ_FIRST(&s->s_data)) != NULL)
		return (&d->d_data);

if (d != NULL)
		return (STAILQ_NEXT(d, d_next) ?
		    &STAILQ_NEXT(d, d_next)->d_data : NULL);

if (e->e_rawfile == NULL) {
		/*
		 * In the ELF_C_WRITE case, there is no source that
		 * can provide data for the section.
		 */
		LIBELF_SET_ERROR(ARGUMENT, 0);
		return (NULL);
	}

elfclass = e->e_class;

assert(elfclass == ELFCLASS32 || elfclass == ELFCLASS64);

if (elfclass == ELFCLASS32) {
		sh_type   = s->s_shdr.s_shdr32.sh_type;
		sh_offset = (uint64_t) s->s_shdr.s_shdr32.sh_offset;
		sh_size   = (uint64_t) s->s_shdr.s_shdr32.sh_size;
		sh_align  = (uint64_t) s->s_shdr.s_shdr32.sh_addralign;
	} else {
		sh_type   = s->s_shdr.s_shdr64.sh_type;
		sh_offset = s->s_shdr.s_shdr64.sh_offset;
		sh_size   = s->s_shdr.s_shdr64.sh_size;
		sh_align  = s->s_shdr.s_shdr64.sh_addralign;
	}

if (sh_type == SHT_NULL) {
		LIBELF_SET_ERROR(SECTION, 0);
		return (NULL);
	}

raw_size = (uint64_t) e->e_rawsize;
	if ((elftype = _libelf_xlate_shtype(sh_type)) < ELF_T_FIRST ||
	    elftype > ELF_T_LAST || (sh_type != SHT_NOBITS &&
	    (sh_offset > raw_size || sh_size > raw_size - sh_offset))) {
		LIBELF_SET_ERROR(SECTION, 0);
		return (NULL);
	}

if ((fsz = (elfclass == ELFCLASS32 ? elf32_fsize : elf64_fsize)
            (elftype, (size_t) 1, e->e_version)) == 0) {
		LIBELF_SET_ERROR(UNIMPL, 0);
		return (NULL);
	}

if (sh_size % fsz) {
		LIBELF_SET_ERROR(SECTION, 0);
		return (NULL);
	}

if (sh_size / fsz > SIZE_MAX) {
		LIBELF_SET_ERROR(RANGE, 0);
		return (NULL);
	}

count = (size_t) (sh_size / fsz);

if ((msz = _libelf_msize(elftype, elfclass, e->e_version)) == 0)
		return (NULL);

if (count > 0 && msz > SIZE_MAX / count) {
		LIBELF_SET_ERROR(RANGE, 0);
		return (NULL);
	}

assert(msz > 0);
	assert(count <= SIZE_MAX);
	assert(msz * count <= SIZE_MAX);

if ((d = _libelf_allocate_data(s)) == NULL)
		return (NULL);

d->d_data.d_buf     = NULL;
	d->d_data.d_off     = 0;
	d->d_data.d_align   = sh_align;
	d->d_data.d_size    = msz * count;
	d->d_data.d_type    = elftype;
	d->d_data.d_version = e->e_version;

if (sh_type == SHT_NOBITS || sh_size == 0) {
	        STAILQ_INSERT_TAIL(&s->s_data, d, d_next);
		return (&d->d_data);
        }

if ((d->d_data.d_buf = malloc(msz * count)) == NULL) {
		(void) _libelf_release_data(d);
		LIBELF_SET_ERROR(RESOURCE, 0);
		return (NULL);
	}

d->d_flags  |= LIBELF_F_DATA_MALLOCED;

xlate = _libelf_get_translator(elftype, ELF_TOMEMORY, elfclass,
	    _libelf_elfmachine(e));
	if (!(*xlate)(d->d_data.d_buf, (size_t) d->d_data.d_size,
	    e->e_rawfile + sh_offset, count,
	    e->e_byteorder != LIBELF_PRIVATE(byteorder))) {
		_libelf_release_data(d);
		LIBELF_SET_ERROR(DATA, 0);
		return (NULL);
	}

STAILQ_INSERT_TAIL(&s->s_data, d, d_next);

return (&d->d_data);
}

Elf_Data *
elf_newdata(Elf_Scn *s)
{
	Elf *e;
	struct _Libelf_Data *d;

if (s == NULL || (e = s->s_elf) == NULL) {
		LIBELF_SET_ERROR(ARGUMENT, 0);
		return (NULL);
	}

assert(e->e_kind == ELF_K_ELF);

/*
	 * elf_newdata() has to append a data descriptor, so
	 * bring in existing section data if not already present.
	 */
	if (e->e_rawfile && s->s_size > 0 && STAILQ_EMPTY(&s->s_data))
		if (elf_getdata(s, NULL) == NULL)
			return (NULL);

if ((d = _libelf_allocate_data(s)) == NULL)
		return (NULL);

STAILQ_INSERT_TAIL(&s->s_data, d, d_next);

d->d_data.d_align = 1;
	d->d_data.d_buf = NULL;
	d->d_data.d_off = (uint64_t) ~0;
	d->d_data.d_size = 0;
	d->d_data.d_type = ELF_T_BYTE;
	d->d_data.d_version = LIBELF_PRIVATE(version);

(void) elf_flagscn(s, ELF_C_SET, ELF_F_DIRTY);

return (&d->d_data);
}

/*
 * Retrieve a data descriptor for raw (untranslated) data for section
 * `s'.
 */

Elf_Data *
elf_rawdata(Elf_Scn *s, Elf_Data *ed)
{
	Elf *e;
	int elf_class;
	uint32_t sh_type;
	struct _Libelf_Data *d;
	uint64_t sh_align, sh_offset, sh_size, raw_size;

if (s == NULL || (e = s->s_elf) == NULL || e->e_rawfile == NULL) {
		LIBELF_SET_ERROR(ARGUMENT, 0);
		return (NULL);
	}

assert(e->e_kind == ELF_K_ELF);

d = (struct _Libelf_Data *) ed;

if (d == NULL && (d = STAILQ_FIRST(&s->s_rawdata)) != NULL)
		return (&d->d_data);

if (d != NULL)
		return (&STAILQ_NEXT(d, d_next)->d_data);

elf_class = e->e_class;

assert(elf_class == ELFCLASS32 || elf_class == ELFCLASS64);

if (elf_class == ELFCLASS32) {
		sh_type   = s->s_shdr.s_shdr32.sh_type;
		sh_offset = (uint64_t) s->s_shdr.s_shdr32.sh_offset;
		sh_size   = (uint64_t) s->s_shdr.s_shdr32.sh_size;
		sh_align  = (uint64_t) s->s_shdr.s_shdr32.sh_addralign;
	} else {
		sh_type   = s->s_shdr.s_shdr64.sh_type;
		sh_offset = s->s_shdr.s_shdr64.sh_offset;
		sh_size   = s->s_shdr.s_shdr64.sh_size;
		sh_align  = s->s_shdr.s_shdr64.sh_addralign;
	}

if (sh_type == SHT_NULL) {
		LIBELF_SET_ERROR(SECTION, 0);
		return (NULL);
	}

raw_size = (uint64_t) e->e_rawsize;
	if (sh_type != SHT_NOBITS &&
	    (sh_offset > raw_size || sh_size > raw_size - sh_offset)) {
		LIBELF_SET_ERROR(SECTION, 0);
		return (NULL);
	}

if ((d = _libelf_allocate_data(s)) == NULL)
		return (NULL);

d->d_data.d_buf = (sh_type == SHT_NOBITS || sh_size == 0) ? NULL :
	    e->e_rawfile + sh_offset;
	d->d_data.d_off     = 0;
	d->d_data.d_align   = sh_align;
	d->d_data.d_size    = sh_size;
	d->d_data.d_type    = ELF_T_BYTE;
	d->d_data.d_version = e->e_version;

STAILQ_INSERT_TAIL(&s->s_rawdata, d, d_next);

return (&d->d_data);
}

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Editing: elf_data.c

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