* Updating common/lib * Updating lib/csu * Updating lib/libc * Updating libexec/ld.elf_so * Corrected test on __minix in featuretest to actually follow the meaning of the comment. * Cleaned up _REENTRANT-related defintions. * Disabled -D_REENTRANT for libfetch * Removing some unneeded __NBSD_LIBC defines and tests Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
186 lines
5 KiB
C
186 lines
5 KiB
C
/* $NetBSD: nlist_ecoff.c,v 1.23 2012/03/20 00:31:24 matt 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_ecoff.c,v 1.23 2012/03/20 00:31:24 matt 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_ECOFF
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#include <sys/exec_ecoff.h>
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#endif
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#ifdef NLIST_ECOFF
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#define check(off, size) \
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((size_t)off >= mappedsize || (size_t)(off + size) > mappedsize)
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int
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__fdnlist_ecoff(int fd, struct nlist *list)
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{
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struct nlist *p;
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const struct ecoff_exechdr *exechdrp;
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const struct ecoff_symhdr *symhdrp;
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const struct ecoff_extsym *esyms;
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struct stat st;
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const char *mappedfile;
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size_t mappedsize;
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u_long symhdroff, extstroff;
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u_int symhdrsize;
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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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goto out;
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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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goto out;
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}
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mappedsize = (size_t)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 == MAP_FAILED)
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goto out;
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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 the recognize the executable
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* as an ECOFF binary.
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*/
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if (check(0, sizeof *exechdrp))
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goto unmap;
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exechdrp = (const void *)mappedfile;
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if (ECOFF_BADMAG(exechdrp))
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goto unmap;
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/*
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* Find the symbol list.
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*/
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symhdroff = exechdrp->f.f_symptr;
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symhdrsize = exechdrp->f.f_nsyms;
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if ((symhdroff + sizeof *symhdrp) > mappedsize ||
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sizeof *symhdrp != symhdrsize)
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goto unmap;
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symhdrp = (const void *)&mappedfile[symhdroff];
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nesyms = symhdrp->esymMax;
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if (check(symhdrp->cbExtOffset, nesyms * sizeof *esyms))
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goto unmap;
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esyms = (const void *)&mappedfile[symhdrp->cbExtOffset];
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extstroff = symhdrp->cbSsExtOffset;
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/*
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* Clean out any left-over information for all valid entries.
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* Type and value are defined to be 0 if not found; historical
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* versions cleared other and desc as well.
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*
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* XXX Clearing anything other than n_type and n_value violates
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* the semantics given in the man page.
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*/
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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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for (p = list; !ISLAST(p); p++) {
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const char *nlistname;
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const char *symtabname;
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/* This may be incorrect */
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nlistname = N_NAME(p);
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if (*nlistname == '_')
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nlistname++;
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symtabname =
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&mappedfile[extstroff + esyms[i].es_strindex];
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if (!strcmp(symtabname, nlistname)) {
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/*
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* Translate (roughly) from ECOFF to nlist
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*/
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p->n_value = esyms[i].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(__UNCONST(mappedfile), mappedsize);
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out:
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return rv;
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}
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#endif /* NLIST_ECOFF */
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