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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: libelf_ehdr.c

/*-
 * Copyright (c) 2006,2008 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 <gelf.h>
#include <libelf.h>
#include <stdlib.h>

#include "_libelf.h"

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

/*
 * Retrieve counts for sections, phdrs and the section string table index
 * from section header #0 of the ELF object.
 */
static int
_libelf_load_extended(Elf *e, int ec, uint64_t shoff, uint16_t phnum,
    uint16_t strndx)
{
	size_t fsz;
	Elf_Scn *scn;
	uint32_t shtype;
	_libelf_translator_function *xlator;

assert(RB_EMPTY(&e->e_u.e_elf.e_scn));

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

if (shoff + fsz < shoff) {	/* Numeric overflow. */
		LIBELF_SET_ERROR(HEADER, 0);
		return (0);
	}

if ((uint64_t) e->e_rawsize < shoff + fsz) {
		LIBELF_SET_ERROR(HEADER, 0);
		return (0);
	}

if ((scn = _libelf_allocate_scn(e, (size_t) 0)) == NULL)
		return (0);

xlator = _libelf_get_translator(ELF_T_SHDR, ELF_TOMEMORY, ec,
	    _libelf_elfmachine(e));
	(*xlator)((unsigned char *) &scn->s_shdr, sizeof(scn->s_shdr),
	    (unsigned char *) e->e_rawfile + shoff, (size_t) 1,
	    e->e_byteorder != LIBELF_PRIVATE(byteorder));

#define	GET_SHDR_MEMBER(M) ((ec == ELFCLASS32) ? scn->s_shdr.s_shdr32.M : \
		scn->s_shdr.s_shdr64.M)

if ((shtype = GET_SHDR_MEMBER(sh_type)) != SHT_NULL) {
		LIBELF_SET_ERROR(SECTION, 0);
		return (0);
	}

e->e_u.e_elf.e_nscn = (size_t) GET_SHDR_MEMBER(sh_size);
	e->e_u.e_elf.e_nphdr = (phnum != PN_XNUM) ? phnum :
	    GET_SHDR_MEMBER(sh_info);
	e->e_u.e_elf.e_strndx = (strndx != SHN_XINDEX) ? strndx :
	    GET_SHDR_MEMBER(sh_link);
#undef	GET_SHDR_MEMBER

return (1);
}

#define	EHDR_INIT(E,SZ)	 do {						\
		Elf##SZ##_Ehdr *eh = (E);				\
		eh->e_ident[EI_MAG0] = ELFMAG0;				\
		eh->e_ident[EI_MAG1] = ELFMAG1;				\
		eh->e_ident[EI_MAG2] = ELFMAG2;				\
		eh->e_ident[EI_MAG3] = ELFMAG3;				\
		eh->e_ident[EI_CLASS] = ELFCLASS##SZ;			\
		eh->e_ident[EI_DATA]  = ELFDATANONE;			\
		eh->e_ident[EI_VERSION] = LIBELF_PRIVATE(version) & 0xFFU; \
		eh->e_machine = EM_NONE;				\
		eh->e_type    = ELF_K_NONE;				\
		eh->e_version = LIBELF_PRIVATE(version);		\
	} while (0)

void *
_libelf_ehdr(Elf *e, int ec, int allocate)
{
	void *ehdr;
	size_t fsz, msz;
	uint16_t phnum, shnum, strndx;
	uint64_t shoff;
	int (*xlator)(unsigned char *_d, size_t _dsz, unsigned char *_s,
	    size_t _c, int _swap);

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

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

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

if (e->e_version != EV_CURRENT) {
		LIBELF_SET_ERROR(VERSION, 0);
		return (NULL);
	}

if (e->e_class == ELFCLASSNONE)
		e->e_class = ec;

if (ec == ELFCLASS32)
		ehdr = (void *) e->e_u.e_elf.e_ehdr.e_ehdr32;
	else
		ehdr = (void *) e->e_u.e_elf.e_ehdr.e_ehdr64;

if (ehdr != NULL)	/* already have a translated ehdr */
		return (ehdr);

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

if (e->e_cmd != ELF_C_WRITE && e->e_rawsize < (off_t) fsz) {
		LIBELF_SET_ERROR(HEADER, 0);
		return (NULL);
	}

if ((msz = _libelf_msize(ELF_T_EHDR, ec, EV_CURRENT)) == 0)
		return (NULL);

if ((ehdr = calloc((size_t) 1, msz)) == NULL) {
		LIBELF_SET_ERROR(RESOURCE, 0);
		return (NULL);
	}

if (ec == ELFCLASS32) {
		e->e_u.e_elf.e_ehdr.e_ehdr32 = ehdr;
		EHDR_INIT(ehdr,32);
	} else {
		e->e_u.e_elf.e_ehdr.e_ehdr64 = ehdr;
		EHDR_INIT(ehdr,64);
	}

if (allocate)
		e->e_flags |= ELF_F_DIRTY;

if (e->e_cmd == ELF_C_WRITE)
		return (ehdr);

xlator = _libelf_get_translator(ELF_T_EHDR, ELF_TOMEMORY, ec,
	    _libelf_elfmachine(e));
	(*xlator)((unsigned char*) ehdr, msz, e->e_rawfile, (size_t) 1,
	    e->e_byteorder != LIBELF_PRIVATE(byteorder));

if (ec == ELFCLASS32) {
		phnum = ((Elf32_Ehdr *) ehdr)->e_phnum;
		shnum = ((Elf32_Ehdr *) ehdr)->e_shnum;
		shoff = ((Elf32_Ehdr *) ehdr)->e_shoff;
		strndx = ((Elf32_Ehdr *) ehdr)->e_shstrndx;
	} else {
		phnum = ((Elf64_Ehdr *) ehdr)->e_phnum;
		shnum = ((Elf64_Ehdr *) ehdr)->e_shnum;
		shoff = ((Elf64_Ehdr *) ehdr)->e_shoff;
		strndx = ((Elf64_Ehdr *) ehdr)->e_shstrndx;
	}

if (shnum >= SHN_LORESERVE ||
	    (shoff == 0LL && (shnum != 0 || phnum == PN_XNUM ||
		strndx == SHN_XINDEX))) {
		LIBELF_SET_ERROR(HEADER, 0);
		return (NULL);
	}

/*
	 * If extended numbering is being used, read the correct
	 * number of sections and program header entries.
	 */
	if ((shnum == 0 && shoff != 0) || phnum == PN_XNUM || strndx == SHN_XINDEX) {
		if (_libelf_load_extended(e, ec, shoff, phnum, strndx) == 0)
			return (NULL);
	} else {
		/* not using extended numbering */
		e->e_u.e_elf.e_nphdr = phnum;
		e->e_u.e_elf.e_nscn = shnum;
		e->e_u.e_elf.e_strndx = strndx;
	}

return (ehdr);
}

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Editing: libelf_ehdr.c

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