This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
199 lines
5 KiB
C
199 lines
5 KiB
C
/* $NetBSD: nlist_coff.c,v 1.8 2009/08/21 08:42:02 he Exp $ */
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/*
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* Copyright (c) 1996 Christopher G. Demetriou
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the
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* NetBSD Project. See http://www.NetBSD.org/ for
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* information about NetBSD.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>>
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: nlist_coff.c,v 1.8 2009/08/21 08:42:02 he Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <sys/param.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/file.h>
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#include <assert.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <nlist.h>
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#include "nlist_private.h"
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#ifdef NLIST_COFF
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#include <sys/exec_coff.h>
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#endif
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#ifdef NLIST_COFF
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#define BAD do { rv = -1; goto out; } while (/*CONSTCOND*/0)
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#define BADUNMAP do { rv = -1; goto unmap; } while (/*CONSTCOND*/0)
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#define ES_LEN 18
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struct coff_extsym {
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union {
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char u_name[8];
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struct {
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int u_zero;
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int u_offset;
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} s;
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} u;
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int32_t es_value;
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int16_t es_scnum;
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int16_t es_type;
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int8_t es_class;
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int8_t es_numaux;
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};
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#define es_name u.u_name
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#define es_zero u.s.u_zero
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#define es_offset u.s.u_offset
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int
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__fdnlist_coff(fd, list)
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int fd;
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struct nlist *list;
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{
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struct nlist *p;
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struct coff_filehdr *filehdrp;
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struct stat st;
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char *mappedfile;
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size_t mappedsize;
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u_long symoff, extstroff;
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int rv, nent;
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long i, nesyms;
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_DIAGASSERT(fd != -1);
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_DIAGASSERT(list != NULL);
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rv = -1;
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/*
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* If we can't fstat() the file, something bad is going on.
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*/
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if (fstat(fd, &st) < 0)
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BAD;
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/*
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* Map the file in its entirety.
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*/
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if ((uintmax_t)st.st_size > (uintmax_t)SIZE_T_MAX) {
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errno = EFBIG;
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BAD;
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}
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mappedsize = st.st_size;
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mappedfile = mmap(NULL, mappedsize, PROT_READ, MAP_PRIVATE|MAP_FILE,
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fd, 0);
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if (mappedfile == (char *)-1)
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BAD;
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/*
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* Make sure we can access the executable's header
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* directly, and make sure we recognize the executable
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* as an COFF binary.
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*/
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if (mappedsize < sizeof (struct coff_filehdr))
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BADUNMAP;
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filehdrp = (struct coff_filehdr *)&mappedfile[0];
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if (COFF_BADMAG(filehdrp))
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BADUNMAP;
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/*
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* Find the symbol list.
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*/
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symoff = filehdrp->f_symptr;
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nesyms = filehdrp->f_nsyms;
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if (symoff + ES_LEN * nesyms > mappedsize)
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BADUNMAP;
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extstroff = symoff + ES_LEN * nesyms;
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nent = 0;
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for (p = list; !ISLAST(p); ++p) {
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p->n_type = 0;
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p->n_other = 0;
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p->n_desc = 0;
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p->n_value = 0;
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++nent;
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}
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for (i = 0; i < nesyms; i++) {
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char *symtabname;
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const char *nlistname;
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struct coff_extsym esym;
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char name[10];
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memcpy(&esym, &mappedfile[symoff + ES_LEN * i], ES_LEN);
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if (esym.es_numaux != 0) {
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i += esym.es_numaux; /* XXX Skip aux entry */
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continue;
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}
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if (esym.es_zero != 0) {
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memcpy(name, esym.es_name, 8);
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name[8] = 0;
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symtabname = name;
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} else if (esym.es_offset != 0)
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symtabname = &mappedfile[extstroff + esym.es_offset];
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else
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continue;
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for (p = list; !ISLAST(p); p++) {
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nlistname = N_NAME(p);
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if (!strcmp(symtabname, nlistname)) {
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/*
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* Translate (roughly) from COFF to nlist
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*/
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p->n_value = esym.es_value;
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p->n_type = N_EXT; /* XXX */
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p->n_desc = 0; /* XXX */
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p->n_other = 0; /* XXX */
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if (--nent <= 0)
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goto done;
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break; /* into next run of outer loop */
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}
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}
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}
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done:
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rv = nent;
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unmap:
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munmap(mappedfile, mappedsize);
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out:
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return (rv);
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}
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#endif /* NLIST_COFF */
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