14484Sbinkertn@umich.edu/*- 24484Sbinkertn@umich.edu * Copyright (c) 2006 Joseph Koshy 34484Sbinkertn@umich.edu * All rights reserved. 44484Sbinkertn@umich.edu * 54484Sbinkertn@umich.edu * Redistribution and use in source and binary forms, with or without 64484Sbinkertn@umich.edu * modification, are permitted provided that the following conditions 74484Sbinkertn@umich.edu * are met: 84484Sbinkertn@umich.edu * 1. Redistributions of source code must retain the above copyright 94484Sbinkertn@umich.edu * notice, this list of conditions and the following disclaimer. 104484Sbinkertn@umich.edu * 2. Redistributions in binary form must reproduce the above copyright 114484Sbinkertn@umich.edu * notice, this list of conditions and the following disclaimer in the 124484Sbinkertn@umich.edu * documentation and/or other materials provided with the distribution. 134484Sbinkertn@umich.edu * 144484Sbinkertn@umich.edu * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 154484Sbinkertn@umich.edu * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 164484Sbinkertn@umich.edu * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 174484Sbinkertn@umich.edu * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 184484Sbinkertn@umich.edu * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 194484Sbinkertn@umich.edu * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 204484Sbinkertn@umich.edu * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 214484Sbinkertn@umich.edu * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 224484Sbinkertn@umich.edu * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 234484Sbinkertn@umich.edu * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 244484Sbinkertn@umich.edu * SUCH DAMAGE. 254484Sbinkertn@umich.edu */ 264484Sbinkertn@umich.edu 274484Sbinkertn@umich.edu#include <limits.h> 284484Sbinkertn@umich.edu 294484Sbinkertn@umich.edu#include "gelf.h" 304484Sbinkertn@umich.edu#include "libelf.h" 314484Sbinkertn@umich.edu 324484Sbinkertn@umich.edu#include "_libelf.h" 334484Sbinkertn@umich.edu 344484Sbinkertn@umich.eduElf32_Phdr * 354484Sbinkertn@umich.eduelf32_getphdr(Elf *e) 364484Sbinkertn@umich.edu{ 374484Sbinkertn@umich.edu return (_libelf_getphdr(e, ELFCLASS32)); 384484Sbinkertn@umich.edu} 394484Sbinkertn@umich.edu 404484Sbinkertn@umich.eduElf64_Phdr * 414484Sbinkertn@umich.eduelf64_getphdr(Elf *e) 424484Sbinkertn@umich.edu{ 434484Sbinkertn@umich.edu return (_libelf_getphdr(e, ELFCLASS64)); 444484Sbinkertn@umich.edu} 454484Sbinkertn@umich.edu 464484Sbinkertn@umich.eduGElf_Phdr * 474484Sbinkertn@umich.edugelf_getphdr(Elf *e, int index, GElf_Phdr *d) 484484Sbinkertn@umich.edu{ 494484Sbinkertn@umich.edu int ec; 504484Sbinkertn@umich.edu Elf32_Ehdr *eh32; 514484Sbinkertn@umich.edu Elf64_Ehdr *eh64; 524484Sbinkertn@umich.edu Elf32_Phdr *ep32; 534484Sbinkertn@umich.edu Elf64_Phdr *ep64; 544484Sbinkertn@umich.edu 554484Sbinkertn@umich.edu if (d == NULL || e == NULL || 564484Sbinkertn@umich.edu ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64) || 574484Sbinkertn@umich.edu (e->e_kind != ELF_K_ELF) || index < 0) { 584484Sbinkertn@umich.edu LIBELF_SET_ERROR(ARGUMENT, 0); 594484Sbinkertn@umich.edu return (NULL); 604484Sbinkertn@umich.edu } 614484Sbinkertn@umich.edu 624484Sbinkertn@umich.edu if (ec == ELFCLASS32) { 634484Sbinkertn@umich.edu if ((eh32 = _libelf_ehdr(e, ELFCLASS32, 0)) == NULL || 644484Sbinkertn@umich.edu ((ep32 = _libelf_getphdr(e, ELFCLASS32)) == NULL)) 654484Sbinkertn@umich.edu return (NULL); 664484Sbinkertn@umich.edu 674484Sbinkertn@umich.edu if (index >= eh32->e_phnum) { 684484Sbinkertn@umich.edu LIBELF_SET_ERROR(ARGUMENT, 0); 694484Sbinkertn@umich.edu return (NULL); 704484Sbinkertn@umich.edu } 714484Sbinkertn@umich.edu 724484Sbinkertn@umich.edu ep32 += index; 734484Sbinkertn@umich.edu 744484Sbinkertn@umich.edu d->p_type = ep32->p_type; 754484Sbinkertn@umich.edu d->p_offset = ep32->p_offset; 764484Sbinkertn@umich.edu d->p_vaddr = (Elf64_Addr) ep32->p_vaddr; 774484Sbinkertn@umich.edu d->p_paddr = (Elf64_Addr) ep32->p_paddr; 784484Sbinkertn@umich.edu d->p_filesz = (Elf64_Xword) ep32->p_filesz; 794484Sbinkertn@umich.edu d->p_memsz = (Elf64_Xword) ep32->p_memsz; 804484Sbinkertn@umich.edu d->p_flags = ep32->p_flags; 814484Sbinkertn@umich.edu d->p_align = (Elf64_Xword) ep32->p_align; 824484Sbinkertn@umich.edu 834484Sbinkertn@umich.edu } else { 844484Sbinkertn@umich.edu if ((eh64 = _libelf_ehdr(e, ELFCLASS64, 0)) == NULL || 854484Sbinkertn@umich.edu (ep64 = _libelf_getphdr(e, ELFCLASS64)) == NULL) 864484Sbinkertn@umich.edu return (NULL); 874484Sbinkertn@umich.edu 884484Sbinkertn@umich.edu if (index >= eh64->e_phnum) { 894484Sbinkertn@umich.edu LIBELF_SET_ERROR(ARGUMENT, 0); 904484Sbinkertn@umich.edu return (NULL); 914484Sbinkertn@umich.edu } 924484Sbinkertn@umich.edu 934484Sbinkertn@umich.edu ep64 += index; 944484Sbinkertn@umich.edu 954484Sbinkertn@umich.edu *d = *ep64; 964484Sbinkertn@umich.edu } 974484Sbinkertn@umich.edu 984484Sbinkertn@umich.edu return (d); 994484Sbinkertn@umich.edu} 1004484Sbinkertn@umich.edu 1014484Sbinkertn@umich.eduElf32_Phdr * 1024484Sbinkertn@umich.eduelf32_newphdr(Elf *e, size_t count) 1034484Sbinkertn@umich.edu{ 1044484Sbinkertn@umich.edu return (_libelf_newphdr(e, ELFCLASS32, count)); 1054484Sbinkertn@umich.edu} 1064484Sbinkertn@umich.edu 1074484Sbinkertn@umich.eduElf64_Phdr * 1084484Sbinkertn@umich.eduelf64_newphdr(Elf *e, size_t count) 1094484Sbinkertn@umich.edu{ 1104484Sbinkertn@umich.edu return (_libelf_newphdr(e, ELFCLASS64, count)); 1114484Sbinkertn@umich.edu} 1124484Sbinkertn@umich.edu 1134484Sbinkertn@umich.eduvoid * 1144484Sbinkertn@umich.edugelf_newphdr(Elf *e, size_t count) 1154484Sbinkertn@umich.edu{ 1164484Sbinkertn@umich.edu if (e == NULL) { 1174484Sbinkertn@umich.edu LIBELF_SET_ERROR(ARGUMENT, 0); 1184484Sbinkertn@umich.edu return (NULL); 1194484Sbinkertn@umich.edu } 1204484Sbinkertn@umich.edu return (_libelf_newphdr(e, e->e_class, count)); 1214484Sbinkertn@umich.edu} 1224484Sbinkertn@umich.edu 1234484Sbinkertn@umich.eduint 1244484Sbinkertn@umich.edugelf_update_phdr(Elf *e, int ndx, GElf_Phdr *s) 1254484Sbinkertn@umich.edu{ 1264484Sbinkertn@umich.edu int ec, phnum; 1274484Sbinkertn@umich.edu void *ehdr; 1284484Sbinkertn@umich.edu Elf32_Phdr *ph32; 1294484Sbinkertn@umich.edu Elf64_Phdr *ph64; 1304484Sbinkertn@umich.edu 1314484Sbinkertn@umich.edu if (s == NULL || e == NULL || e->e_kind != ELF_K_ELF || 1324484Sbinkertn@umich.edu ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) { 1334484Sbinkertn@umich.edu LIBELF_SET_ERROR(ARGUMENT, 0); 1344484Sbinkertn@umich.edu return (0); 1354484Sbinkertn@umich.edu } 1364484Sbinkertn@umich.edu 1374484Sbinkertn@umich.edu if (e->e_cmd == ELF_C_READ) { 1384484Sbinkertn@umich.edu LIBELF_SET_ERROR(MODE, 0); 1394484Sbinkertn@umich.edu return (0); 1404484Sbinkertn@umich.edu } 1414484Sbinkertn@umich.edu 1424484Sbinkertn@umich.edu if ((ehdr = _libelf_ehdr(e, ec, 0)) == NULL) 1434484Sbinkertn@umich.edu return (0); 1444484Sbinkertn@umich.edu 1454484Sbinkertn@umich.edu if (ec == ELFCLASS32) 1464484Sbinkertn@umich.edu phnum = ((Elf32_Ehdr *) ehdr)->e_phnum; 1474484Sbinkertn@umich.edu else 1484484Sbinkertn@umich.edu phnum = ((Elf64_Ehdr *) ehdr)->e_phnum; 1494484Sbinkertn@umich.edu 1504484Sbinkertn@umich.edu if (ndx < 0 || ndx > phnum) { 1514484Sbinkertn@umich.edu LIBELF_SET_ERROR(ARGUMENT, 0); 1524484Sbinkertn@umich.edu return (0); 1534484Sbinkertn@umich.edu } 1544484Sbinkertn@umich.edu 1554484Sbinkertn@umich.edu if (ec == ELFCLASS64) { 1564484Sbinkertn@umich.edu ph64 = e->e_u.e_elf.e_phdr.e_phdr64 + ndx; 1574484Sbinkertn@umich.edu *ph64 = *s; 1584484Sbinkertn@umich.edu return (1); 1594484Sbinkertn@umich.edu } 1604484Sbinkertn@umich.edu 1614484Sbinkertn@umich.edu ph32 = e->e_u.e_elf.e_phdr.e_phdr32 + ndx; 1624484Sbinkertn@umich.edu 1634484Sbinkertn@umich.edu ph32->p_type = s->p_type; 1644484Sbinkertn@umich.edu ph32->p_flags = s->p_flags; 1654484Sbinkertn@umich.edu LIBELF_COPY_U32(ph32, s, p_offset); 1664484Sbinkertn@umich.edu LIBELF_COPY_U32(ph32, s, p_vaddr); 1674484Sbinkertn@umich.edu LIBELF_COPY_U32(ph32, s, p_paddr); 1684484Sbinkertn@umich.edu LIBELF_COPY_U32(ph32, s, p_filesz); 1694484Sbinkertn@umich.edu LIBELF_COPY_U32(ph32, s, p_memsz); 1704484Sbinkertn@umich.edu LIBELF_COPY_U32(ph32, s, p_align); 1714484Sbinkertn@umich.edu 1724484Sbinkertn@umich.edu (void) elf_flagphdr(e, ELF_C_SET, ELF_F_DIRTY); 1734484Sbinkertn@umich.edu 1744484Sbinkertn@umich.edu return (1); 1754484Sbinkertn@umich.edu} 176