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 <assert.h> 28260684Skaiw#include <gelf.h> 29260684Skaiw 30260684Skaiw#include "_libelf.h" 31260684Skaiw 32367466SdimELFTC_VCSID("$Id: gelf_syminfo.c 3732 2019-04-22 11:08:38Z jkoshy $"); 33260684Skaiw 34260684SkaiwGElf_Syminfo * 35260684Skaiwgelf_getsyminfo(Elf_Data *ed, int ndx, GElf_Syminfo *dst) 36260684Skaiw{ 37260684Skaiw int ec; 38260684Skaiw Elf *e; 39260684Skaiw size_t msz; 40260684Skaiw Elf_Scn *scn; 41260684Skaiw uint32_t sh_type; 42260684Skaiw struct _Libelf_Data *d; 43260684Skaiw Elf32_Syminfo *syminfo32; 44260684Skaiw Elf64_Syminfo *syminfo64; 45260684Skaiw 46260684Skaiw d = (struct _Libelf_Data *) ed; 47260684Skaiw 48260684Skaiw if (d == NULL || ndx < 0 || dst == NULL || 49260684Skaiw (scn = d->d_scn) == NULL || 50260684Skaiw (e = scn->s_elf) == NULL) { 51260684Skaiw LIBELF_SET_ERROR(ARGUMENT, 0); 52260684Skaiw return (NULL); 53260684Skaiw } 54260684Skaiw 55260684Skaiw ec = e->e_class; 56260684Skaiw assert(ec == ELFCLASS32 || ec == ELFCLASS64); 57260684Skaiw 58260684Skaiw if (ec == ELFCLASS32) 59260684Skaiw sh_type = scn->s_shdr.s_shdr32.sh_type; 60260684Skaiw else 61260684Skaiw sh_type = scn->s_shdr.s_shdr64.sh_type; 62260684Skaiw 63260684Skaiw if (_libelf_xlate_shtype(sh_type) != ELF_T_SYMINFO) { 64260684Skaiw LIBELF_SET_ERROR(ARGUMENT, 0); 65260684Skaiw return (NULL); 66260684Skaiw } 67260684Skaiw 68367466Sdim if ((msz = _libelf_msize(ELF_T_SYMINFO, ec, e->e_version)) == 0) 69367466Sdim return (NULL); 70260684Skaiw 71276371Semaste assert(ndx >= 0); 72260684Skaiw 73276371Semaste if (msz * (size_t) ndx >= d->d_data.d_size) { 74260684Skaiw LIBELF_SET_ERROR(ARGUMENT, 0); 75260684Skaiw return (NULL); 76260684Skaiw } 77260684Skaiw 78260684Skaiw if (ec == ELFCLASS32) { 79260684Skaiw 80260684Skaiw syminfo32 = (Elf32_Syminfo *) d->d_data.d_buf + ndx; 81260684Skaiw 82260684Skaiw dst->si_boundto = syminfo32->si_boundto; 83260684Skaiw dst->si_flags = syminfo32->si_flags; 84260684Skaiw 85260684Skaiw } else { 86260684Skaiw 87260684Skaiw syminfo64 = (Elf64_Syminfo *) d->d_data.d_buf + ndx; 88260684Skaiw 89260684Skaiw *dst = *syminfo64; 90260684Skaiw } 91260684Skaiw 92260684Skaiw return (dst); 93260684Skaiw} 94260684Skaiw 95260684Skaiwint 96260684Skaiwgelf_update_syminfo(Elf_Data *ed, int ndx, GElf_Syminfo *gs) 97260684Skaiw{ 98260684Skaiw int ec; 99260684Skaiw Elf *e; 100260684Skaiw size_t msz; 101260684Skaiw Elf_Scn *scn; 102260684Skaiw uint32_t sh_type; 103260684Skaiw struct _Libelf_Data *d; 104260684Skaiw Elf32_Syminfo *syminfo32; 105260684Skaiw Elf64_Syminfo *syminfo64; 106260684Skaiw 107260684Skaiw d = (struct _Libelf_Data *) ed; 108260684Skaiw 109260684Skaiw if (d == NULL || ndx < 0 || gs == NULL || 110260684Skaiw (scn = d->d_scn) == NULL || 111260684Skaiw (e = scn->s_elf) == NULL) { 112260684Skaiw LIBELF_SET_ERROR(ARGUMENT, 0); 113260684Skaiw return (0); 114260684Skaiw } 115260684Skaiw 116260684Skaiw ec = e->e_class; 117260684Skaiw assert(ec == ELFCLASS32 || ec == ELFCLASS64); 118260684Skaiw 119260684Skaiw if (ec == ELFCLASS32) 120260684Skaiw sh_type = scn->s_shdr.s_shdr32.sh_type; 121260684Skaiw else 122260684Skaiw sh_type = scn->s_shdr.s_shdr64.sh_type; 123260684Skaiw 124260684Skaiw if (_libelf_xlate_shtype(sh_type) != ELF_T_SYMINFO) { 125260684Skaiw LIBELF_SET_ERROR(ARGUMENT, 0); 126260684Skaiw return (0); 127260684Skaiw } 128260684Skaiw 129367466Sdim if ((msz = _libelf_msize(ELF_T_SYMINFO, ec, e->e_version)) == 0) 130367466Sdim return (0); 131276371Semaste 132276371Semaste assert(ndx >= 0); 133260684Skaiw 134276371Semaste if (msz * (size_t) ndx >= d->d_data.d_size) { 135260684Skaiw LIBELF_SET_ERROR(ARGUMENT, 0); 136260684Skaiw return (0); 137260684Skaiw } 138260684Skaiw 139260684Skaiw if (ec == ELFCLASS32) { 140260684Skaiw syminfo32 = (Elf32_Syminfo *) d->d_data.d_buf + ndx; 141260684Skaiw 142260684Skaiw syminfo32->si_boundto = gs->si_boundto; 143260684Skaiw syminfo32->si_flags = gs->si_flags; 144260684Skaiw 145260684Skaiw } else { 146260684Skaiw syminfo64 = (Elf64_Syminfo *) d->d_data.d_buf + ndx; 147260684Skaiw 148260684Skaiw *syminfo64 = *gs; 149260684Skaiw } 150260684Skaiw 151260684Skaiw return (1); 152260684Skaiw} 153