259 lines
6.9 KiB
C
259 lines
6.9 KiB
C
/* $NetBSD: nlist_ecoff.c,v 1.1 1996/09/29 02:19:58 cgd Exp $ */
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/*
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* Copyright (c) 1996 Christopher G. Demetriou. 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 by Christopher G. Demetriou
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* for the NetBSD Project.
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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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#ifndef lint
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static char *rcsid = "$NetBSD: nlist_ecoff.c,v 1.1 1996/09/29 02:19:58 cgd Exp $";
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#endif /* not lint */
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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 <a.out.h>
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#include <db.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <kvm.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "extern.h"
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#ifdef NLIST_ECOFF
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#include <sys/exec_ecoff.h>
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typedef struct nlist NLIST;
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#define _strx n_un.n_strx
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#define _name n_un.n_name
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#define badfmt(str) \
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do { \
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warnx("%s: %s: %s", kfile, str, strerror(EFTYPE)); \
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punt(); \
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} while (0)
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#define check(off, size) ((off < 0) || (off + size > mappedsize))
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#define BAD do { rv = -1; goto out; } while (0)
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#define BADUNMAP do { rv = -1; goto unmap; } while (0)
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static const char *kfile;
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int
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create_knlist_ecoff(name, db)
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const char *name;
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DB *db;
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{
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struct ecoff_exechdr *exechdrp;
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struct ecoff_symhdr *symhdrp;
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struct ecoff_extsym *esyms;
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struct stat st;
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struct nlist nbuf;
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DBT key, data;
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char *mappedfile, *symname, *fsymname, *tmpcp;
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size_t mappedsize, symnamesize, fsymnamesize;
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u_long symhdroff, extrstroff, kerntextoff;
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u_long symhdrsize, i, nesyms;
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int fd, rv;
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rv = -1;
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/*
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* Open and map the whole file. If we can't open/stat it,
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* something bad is going on so we punt.
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*/
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kfile = name;
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if ((fd = open(name, O_RDONLY, 0)) < 0) {
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warn("%s", kfile);
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punt();
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}
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if (fstat(fd, &st) < 0) {
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warn("%s", kfile);
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punt();
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}
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if (st.st_size > SIZE_T_MAX)
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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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mappedsize = st.st_size;
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mappedfile = mmap(NULL, mappedsize, PROT_READ, 0, 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 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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BADUNMAP;
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exechdrp = (struct ecoff_exechdr *)&mappedfile[0];
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if (ECOFF_BADMAG(exechdrp))
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BADUNMAP;
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/*
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* We've recognized it as an ECOFF binary. From here
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* on out, all errors are fatal.
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*/
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/*
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* Find the start of the kernel's text, for later use in
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* setting up the version string's entry.
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*/
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kerntextoff = get_kerntext(name);
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/*
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* Find the symbol list and string table.
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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 (symhdrsize == 0)
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badfmt("stripped");
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if (check(symhdroff, sizeof *symhdrp) || sizeof *symhdrp != symhdrsize)
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badfmt("bogus symbol table");
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symhdrp = (struct ecoff_symhdr *)&mappedfile[symhdroff];
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nesyms = symhdrp->esymMax;
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if (check(symhdrp->cbExtOffset, nesyms * sizeof *esyms))
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badfmt("bogus external symbol list");
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esyms = (struct ecoff_extsym *)&mappedfile[symhdrp->cbExtOffset];
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extrstroff = symhdrp->cbSsExtOffset;
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/*
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* Set up the data item, pointing to a nlist structure.
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* which we fill in for each symbol.
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*/
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data.data = (u_char *)&nbuf;
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data.size = sizeof(nbuf);
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/*
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* Create a buffer (to be expanded later, if necessary)
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* to hold symbol names after we've added underscores
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* to them.
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*/
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symnamesize = 1024;
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if ((symname = malloc(symnamesize)) == NULL) {
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warn("malloc");
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punt();
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}
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/*
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* Read each symbol and enter it into the database.
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*/
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for (i = 0; i < nesyms; i++) {
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/*
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* Find symbol name, copy it (with added underscore) to
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* temporary buffer, and prepare the database key for
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* insertion.
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*/
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fsymname = &mappedfile[extrstroff + esyms[i].es_strindex];
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fsymnamesize = strlen(fsymname) + 1;
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while (symnamesize < fsymnamesize + 1) {
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symnamesize *= 2;
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if ((symname = realloc(symname, symnamesize)) == NULL) {
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warn("malloc");
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punt();
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}
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}
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strcpy(symname, "_");
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strcat(symname, fsymname);
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key.data = symname;
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key.size = strlen((char *)key.data);
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/*
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* Convert the symbol information into an nlist structure,
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* as best we can.
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*/
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nbuf.n_value = esyms[i].es_value;
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nbuf.n_type = N_EXT; /* XXX */
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nbuf.n_desc = 0; /* XXX */
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nbuf.n_other = 0; /* XXX */
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/*
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* Enter the symbol into the database.
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*/
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if (db->put(db, &key, &data, 0)) {
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warn("record enter");
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punt();
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}
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/*
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* If it's the kernel version string, we've gotta keep
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* some extra data around. Under a seperate key,
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* we enter the first line (i.e. up to the first newline,
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* with the newline replaced by a NUL to terminate the
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* entered string) of the version string.
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*/
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if (strcmp((char *)key.data, VRS_SYM) == 0) {
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key.data = (u_char *)VRS_KEY;
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key.size = sizeof(VRS_KEY) - 1;
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/* Find the version string, relative to start */
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data.data = strdup(&mappedfile[nbuf.n_value -
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kerntextoff + ECOFF_TXTOFF(exechdrp)]);
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/* assumes newline terminates version. */
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if ((tmpcp = strchr(data.data, '\n')) != NULL)
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*tmpcp = '\0';
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data.size = strlen((char *)data.data);
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if (db->put(db, &key, &data, 0)) {
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warn("record enter");
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punt();
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}
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/* free pointer created by strdup(). */
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free(data.data);
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/* Restore to original values */
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data.data = (u_char *)&nbuf;
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data.size = sizeof(nbuf);
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}
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}
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rv = 0;
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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_ECOFF */
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