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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_scn.c

/*-
 * Copyright (c) 2006,2008-2010 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 <sys/queue.h>

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

#include "_libelf.h"

ELFTC_VCSID("$Id: elf_scn.c 3712 2019-03-16 22:23:34Z jkoshy $");

static int
elfscn_cmp(struct _Elf_Scn *s1, struct _Elf_Scn *s2)
{

if (s1->s_ndx < s2->s_ndx)
		return (-1);
	if (s1->s_ndx > s2->s_ndx)
		return (1);
	return (0);
}

RB_GENERATE(scntree, _Elf_Scn, s_tree, elfscn_cmp);

/*
 * Load an ELF section table and create a list of Elf_Scn structures.
 */
int
_libelf_load_section_headers(Elf *e, void *ehdr)
{
	Elf_Scn *scn;
	uint64_t shoff;
	Elf32_Ehdr *eh32;
	Elf64_Ehdr *eh64;
	int ec, swapbytes;
	unsigned char *src;
	size_t fsz, i, shnum;
	_libelf_translator_function *xlator;

assert(e != NULL);
	assert(ehdr != NULL);
	assert((e->e_flags & LIBELF_F_SHDRS_LOADED) == 0);

#define	CHECK_EHDR(E,EH)	do {				\
		uintmax_t rawsize = (uintmax_t) e->e_rawsize;	\
		if (shoff > (uintmax_t) e->e_rawsize ||		\
		    fsz != (EH)->e_shentsize ||			\
		    shnum > SIZE_MAX / fsz ||			\
		    fsz * shnum > rawsize - shoff) {		\
			LIBELF_SET_ERROR(HEADER, 0);		\
			return (0);				\
		}						\
	} while (0)

ec = e->e_class;
	fsz = _libelf_fsize(ELF_T_SHDR, ec, e->e_version, (size_t) 1);
	assert(fsz > 0);

shnum = e->e_u.e_elf.e_nscn;

if (ec == ELFCLASS32) {
		eh32 = (Elf32_Ehdr *) ehdr;
		shoff = (uint64_t) eh32->e_shoff;
		CHECK_EHDR(e, eh32);
	} else {
		eh64 = (Elf64_Ehdr *) ehdr;
		shoff = eh64->e_shoff;
		CHECK_EHDR(e, eh64);
	}

xlator = _libelf_get_translator(ELF_T_SHDR, ELF_TOMEMORY, ec,
	    _libelf_elfmachine(e));

swapbytes = e->e_byteorder != LIBELF_PRIVATE(byteorder);
	src = e->e_rawfile + shoff;

/*
	 * If the file is using extended numbering then section #0
	 * would have already been read in.
	 */

i = 0;
	if (!RB_EMPTY(&e->e_u.e_elf.e_scn)) {
		assert(RB_MIN(scntree, &e->e_u.e_elf.e_scn) ==
		    RB_MAX(scntree, &e->e_u.e_elf.e_scn));

i = 1;
		src += fsz;
	}

for (; i < shnum; i++, src += fsz) {
		if ((scn = _libelf_allocate_scn(e, i)) == NULL)
			return (0);

(*xlator)((unsigned char *) &scn->s_shdr, sizeof(scn->s_shdr),
		    src, (size_t) 1, swapbytes);

if (ec == ELFCLASS32) {
			scn->s_offset = scn->s_rawoff =
			    scn->s_shdr.s_shdr32.sh_offset;
			scn->s_size = scn->s_shdr.s_shdr32.sh_size;
		} else {
			scn->s_offset = scn->s_rawoff =
			    scn->s_shdr.s_shdr64.sh_offset;
			scn->s_size = scn->s_shdr.s_shdr64.sh_size;
		}
	}

e->e_flags |= LIBELF_F_SHDRS_LOADED;

return (1);
}

Elf_Scn *
elf_getscn(Elf *e, size_t index)
{
	int ec;
	void *ehdr;
	Elf_Scn *s;

if (e == NULL || e->e_kind != ELF_K_ELF ||
	    ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) {
		LIBELF_SET_ERROR(ARGUMENT, 0);
		return (NULL);
	}

if ((ehdr = _libelf_ehdr(e, ec, 0)) == NULL)
		return (NULL);

if (e->e_cmd != ELF_C_WRITE &&
	    (e->e_flags & LIBELF_F_SHDRS_LOADED) == 0 &&
	    _libelf_load_section_headers(e, ehdr) == 0)
		return (NULL);

for (s = RB_ROOT(&e->e_u.e_elf.e_scn); s != NULL;) {
		if (s->s_ndx == index)
			return (s);

if (s->s_ndx < index)
			s = RB_RIGHT(s, s_tree);
		else
			s = RB_LEFT(s, s_tree);
	}

LIBELF_SET_ERROR(ARGUMENT, 0);
	return (NULL);
}

size_t
elf_ndxscn(Elf_Scn *s)
{
	if (s == NULL) {
		LIBELF_SET_ERROR(ARGUMENT, 0);
		return (SHN_UNDEF);
	}
	return (s->s_ndx);
}

Elf_Scn *
elf_newscn(Elf *e)
{
	int ec;
	void *ehdr;
	Elf_Scn *scn;

if (e == NULL || e->e_kind != ELF_K_ELF) {
		LIBELF_SET_ERROR(ARGUMENT, 0);
		return (NULL);
	}

if ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64) {
		LIBELF_SET_ERROR(CLASS, 0);
		return (NULL);
	}

if ((ehdr = _libelf_ehdr(e, ec, 0)) == NULL)
		return (NULL);

/*
	 * The application may be asking for a new section descriptor
	 * on an ELF object opened with ELF_C_RDWR or ELF_C_READ.  We
	 * need to bring in the existing section information before
	 * appending a new one to the list.
	 *
	 * Per the ELF(3) API, an application is allowed to open a
	 * file using ELF_C_READ, mess with its internal structure and
	 * use elf_update(...,ELF_C_NULL) to compute its new layout.
	 */
	if (e->e_cmd != ELF_C_WRITE &&
	    (e->e_flags & LIBELF_F_SHDRS_LOADED) == 0 &&
	    _libelf_load_section_headers(e, ehdr) == 0)
		return (NULL);

if (RB_EMPTY(&e->e_u.e_elf.e_scn)) {
		assert(e->e_u.e_elf.e_nscn == 0);
		if ((scn = _libelf_allocate_scn(e, (size_t) SHN_UNDEF)) ==
		    NULL)
			return (NULL);
		e->e_u.e_elf.e_nscn++;
	}

assert(e->e_u.e_elf.e_nscn > 0);

if ((scn = _libelf_allocate_scn(e, e->e_u.e_elf.e_nscn)) == NULL)
		return (NULL);

e->e_u.e_elf.e_nscn++;

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

return (scn);
}

Elf_Scn *
elf_nextscn(Elf *e, Elf_Scn *s)
{
	if (e == NULL || (e->e_kind != ELF_K_ELF) ||
	    (s && s->s_elf != e)) {
		LIBELF_SET_ERROR(ARGUMENT, 0);
		return (NULL);
	}

return (s == NULL ? elf_getscn(e, (size_t) 1) :
	    RB_NEXT(scntree, &e->e_u.e_elf.e_scn, s));
}

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Editing: elf_scn.c

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