gelf_syminfo.c revision 276371
1260684Skaiw/*- 2260684Skaiw * Copyright (c) 2006,2008 Joseph Koshy 3260684Skaiw * All rights reserved. 4260684Skaiw * 5260684Skaiw * Redistribution and use in source and binary forms, with or without 6260684Skaiw * modification, are permitted provided that the following conditions 7260684Skaiw * are met: 8260684Skaiw * 1. Redistributions of source code must retain the above copyright 9260684Skaiw * notice, this list of conditions and the following disclaimer. 10260684Skaiw * 2. Redistributions in binary form must reproduce the above copyright 11260684Skaiw * notice, this list of conditions and the following disclaimer in the 12260684Skaiw * documentation and/or other materials provided with the distribution. 13260684Skaiw * 14260684Skaiw * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15260684Skaiw * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16260684Skaiw * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17260684Skaiw * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18260684Skaiw * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19260684Skaiw * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20260684Skaiw * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21260684Skaiw * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22260684Skaiw * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23260684Skaiw * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24260684Skaiw * SUCH DAMAGE. 25260684Skaiw */ 26260684Skaiw 27260684Skaiw#include <sys/cdefs.h> 28260684Skaiw 29260684Skaiw#include <assert.h> 30260684Skaiw#include <gelf.h> 31260684Skaiw 32260684Skaiw#include "_libelf.h" 33260684Skaiw 34276371SemasteELFTC_VCSID("$Id: gelf_syminfo.c 2998 2014-03-18 17:19:00Z jkoshy $"); 35260684Skaiw 36260684SkaiwGElf_Syminfo * 37260684Skaiwgelf_getsyminfo(Elf_Data *ed, int ndx, GElf_Syminfo *dst) 38260684Skaiw{ 39260684Skaiw int ec; 40260684Skaiw Elf *e; 41260684Skaiw size_t msz; 42260684Skaiw Elf_Scn *scn; 43260684Skaiw uint32_t sh_type; 44260684Skaiw struct _Libelf_Data *d; 45260684Skaiw Elf32_Syminfo *syminfo32; 46260684Skaiw Elf64_Syminfo *syminfo64; 47260684Skaiw 48260684Skaiw d = (struct _Libelf_Data *) ed; 49260684Skaiw 50260684Skaiw if (d == NULL || ndx < 0 || dst == NULL || 51260684Skaiw (scn = d->d_scn) == NULL || 52260684Skaiw (e = scn->s_elf) == NULL) { 53260684Skaiw LIBELF_SET_ERROR(ARGUMENT, 0); 54260684Skaiw return (NULL); 55260684Skaiw } 56260684Skaiw 57260684Skaiw ec = e->e_class; 58260684Skaiw assert(ec == ELFCLASS32 || ec == ELFCLASS64); 59260684Skaiw 60260684Skaiw if (ec == ELFCLASS32) 61260684Skaiw sh_type = scn->s_shdr.s_shdr32.sh_type; 62260684Skaiw else 63260684Skaiw sh_type = scn->s_shdr.s_shdr64.sh_type; 64260684Skaiw 65260684Skaiw if (_libelf_xlate_shtype(sh_type) != ELF_T_SYMINFO) { 66260684Skaiw LIBELF_SET_ERROR(ARGUMENT, 0); 67260684Skaiw return (NULL); 68260684Skaiw } 69260684Skaiw 70260684Skaiw msz = _libelf_msize(ELF_T_SYMINFO, ec, e->e_version); 71260684Skaiw 72260684Skaiw assert(msz > 0); 73276371Semaste assert(ndx >= 0); 74260684Skaiw 75276371Semaste if (msz * (size_t) ndx >= d->d_data.d_size) { 76260684Skaiw LIBELF_SET_ERROR(ARGUMENT, 0); 77260684Skaiw return (NULL); 78260684Skaiw } 79260684Skaiw 80260684Skaiw if (ec == ELFCLASS32) { 81260684Skaiw 82260684Skaiw syminfo32 = (Elf32_Syminfo *) d->d_data.d_buf + ndx; 83260684Skaiw 84260684Skaiw dst->si_boundto = syminfo32->si_boundto; 85260684Skaiw dst->si_flags = syminfo32->si_flags; 86260684Skaiw 87260684Skaiw } else { 88260684Skaiw 89260684Skaiw syminfo64 = (Elf64_Syminfo *) d->d_data.d_buf + ndx; 90260684Skaiw 91260684Skaiw *dst = *syminfo64; 92260684Skaiw } 93260684Skaiw 94260684Skaiw return (dst); 95260684Skaiw} 96260684Skaiw 97260684Skaiwint 98260684Skaiwgelf_update_syminfo(Elf_Data *ed, int ndx, GElf_Syminfo *gs) 99260684Skaiw{ 100260684Skaiw int ec; 101260684Skaiw Elf *e; 102260684Skaiw size_t msz; 103260684Skaiw Elf_Scn *scn; 104260684Skaiw uint32_t sh_type; 105260684Skaiw struct _Libelf_Data *d; 106260684Skaiw Elf32_Syminfo *syminfo32; 107260684Skaiw Elf64_Syminfo *syminfo64; 108260684Skaiw 109260684Skaiw d = (struct _Libelf_Data *) ed; 110260684Skaiw 111260684Skaiw if (d == NULL || ndx < 0 || gs == NULL || 112260684Skaiw (scn = d->d_scn) == NULL || 113260684Skaiw (e = scn->s_elf) == NULL) { 114260684Skaiw LIBELF_SET_ERROR(ARGUMENT, 0); 115260684Skaiw return (0); 116260684Skaiw } 117260684Skaiw 118260684Skaiw ec = e->e_class; 119260684Skaiw assert(ec == ELFCLASS32 || ec == ELFCLASS64); 120260684Skaiw 121260684Skaiw if (ec == ELFCLASS32) 122260684Skaiw sh_type = scn->s_shdr.s_shdr32.sh_type; 123260684Skaiw else 124260684Skaiw sh_type = scn->s_shdr.s_shdr64.sh_type; 125260684Skaiw 126260684Skaiw if (_libelf_xlate_shtype(sh_type) != ELF_T_SYMINFO) { 127260684Skaiw LIBELF_SET_ERROR(ARGUMENT, 0); 128260684Skaiw return (0); 129260684Skaiw } 130260684Skaiw 131260684Skaiw msz = _libelf_msize(ELF_T_SYMINFO, ec, e->e_version); 132276371Semaste 133260684Skaiw assert(msz > 0); 134276371Semaste assert(ndx >= 0); 135260684Skaiw 136276371Semaste if (msz * (size_t) ndx >= d->d_data.d_size) { 137260684Skaiw LIBELF_SET_ERROR(ARGUMENT, 0); 138260684Skaiw return (0); 139260684Skaiw } 140260684Skaiw 141260684Skaiw if (ec == ELFCLASS32) { 142260684Skaiw syminfo32 = (Elf32_Syminfo *) d->d_data.d_buf + ndx; 143260684Skaiw 144260684Skaiw syminfo32->si_boundto = gs->si_boundto; 145260684Skaiw syminfo32->si_flags = gs->si_flags; 146260684Skaiw 147260684Skaiw } else { 148260684Skaiw syminfo64 = (Elf64_Syminfo *) d->d_data.d_buf + ndx; 149260684Skaiw 150260684Skaiw *syminfo64 = *gs; 151260684Skaiw } 152260684Skaiw 153260684Skaiw return (1); 154260684Skaiw} 155