1 /*- 2 * Copyright (c) 2016 Kai Wang 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <errno.h> 28 29 #include "_libpe.h" 30 31 ELFTC_VCSID("$Id: pe_symtab.c 3312 2016-01-10 09:23:51Z kaiwang27 $"); 32 33 int 34 pe_update_symtab(PE *pe, char *symtab, size_t sz, unsigned int nsym) 35 { 36 PE_Scn *ps, *pstmp; 37 PE_SecBuf *sb; 38 PE_SecHdr *sh; 39 40 if (pe == NULL || symtab == NULL || sz == 0) { 41 errno = EINVAL; 42 return (-1); 43 } 44 45 if (pe->pe_cmd == PE_C_READ || pe->pe_flags & LIBPE_F_FD_DONE) { 46 errno = EACCES; 47 return (-1); 48 } 49 50 /* Remove the old symbol table. */ 51 STAILQ_FOREACH_SAFE(ps, &pe->pe_scn, ps_next, pstmp) { 52 if (ps->ps_ndx == 0xFFFFFFFFU) 53 libpe_release_scn(ps); 54 } 55 56 /* 57 * Insert the new symbol table. 58 */ 59 60 if ((ps = libpe_alloc_scn(pe)) == NULL) 61 return (-1); 62 63 STAILQ_INSERT_TAIL(&pe->pe_scn, ps, ps_next); 64 ps->ps_ndx = 0xFFFFFFFFU; 65 ps->ps_flags |= PE_F_DIRTY; 66 67 /* 68 * Set the symbol table section offset to the maximum to make sure 69 * that it will be placed in the end of the file during section 70 * layout. 71 */ 72 sh = &ps->ps_sh; 73 sh->sh_rawptr = 0xFFFFFFFFU; 74 sh->sh_rawsize = sz; 75 76 /* Allocate the buffer. */ 77 if ((sb = libpe_alloc_buffer(ps, 0)) == NULL) 78 return (-1); 79 sb->sb_flags |= PE_F_DIRTY; 80 sb->sb_pb.pb_size = sz; 81 sb->sb_pb.pb_buf = symtab; 82 83 pe->pe_nsym = nsym; 84 85 return (0); 86 } 87