initial import of NetBSD tree

1 files changed, 313 insertions, 0 deletions

diff --git a/usr.bin/strip/strip.c b/usr.bin/strip/strip.c
new file mode 100644
index 00000000000..831d06fbdbb
--- /dev/null
+++ b/usr.bin/strip/strip.c
@@ -0,0 +1,313 @@
+/*
+ * Copyright (c) 1988 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+char copyright[] =
+"@(#) Copyright (c) 1988 Regents of the University of California.\n\
+ All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+/*static char sccsid[] = "from: @(#)strip.c	5.8 (Berkeley) 11/6/91";*/
+static char rcsid[] = "$Id: strip.c,v 1.1 1995/10/18 08:46:09 deraadt Exp $";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <a.out.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+typedef struct exec EXEC;
+typedef struct nlist NLIST;
+
+#define	strx	n_un.n_strx
+
+void err __P((const char *fmt, ...));
+int s_stab __P((const char *, int, EXEC *, struct stat *));
+int s_sym __P((const char *, int, EXEC *, struct stat *));
+void usage __P((void));
+
+int xflag = 0;
+        
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	register int fd, nb;
+	EXEC *ep;
+	struct stat sb;
+	int (*sfcn)__P((const char *, int, EXEC *, struct stat *));
+	int ch, errors;
+	char *fn;
+
+	sfcn = s_sym;
+	while ((ch = getopt(argc, argv, "dx")) != EOF)
+		switch(ch) {
+                case 'x':
+                        xflag = 1;
+                        /*FALLTHROUGH*/
+		case 'd':
+			sfcn = s_stab;
+			break;
+		case '?':
+		default:
+			usage();
+		}
+	argc -= optind;
+	argv += optind;
+
+	errors = 0;
+#define	ERROR(x) errors |= 1; err("%s: %s", fn, strerror(x)); continue;
+	while (fn = *argv++) {
+		if ((fd = open(fn, O_RDWR)) < 0) {
+			ERROR(errno);
+		}
+        	if (fstat(fd, &sb)) {
+			(void)close(fd);
+			ERROR(errno);
+		}
+		if (sb.st_size < sizeof(EXEC)) {
+			(void)close(fd);
+			ERROR(EFTYPE);
+		}
+		if ((ep = (EXEC *)mmap(NULL, sb.st_size, PROT_READ|PROT_WRITE,
+		    MAP_SHARED, fd, (off_t)0)) == (EXEC *)-1) {
+			(void)close(fd);
+			ERROR(errno);
+		}
+		if (N_BADMAG(*ep)) {
+			munmap((caddr_t)ep, sb.st_size);
+			(void)close(fd);
+			ERROR(EFTYPE);
+		}
+		errors |= sfcn(fn, fd, ep, &sb);
+		munmap((caddr_t)ep, sb.st_size);
+		if (close(fd)) {
+			ERROR(errno);
+		}
+	}
+#undef ERROR
+	exit(errors);
+}
+
+int
+s_sym(fn, fd, ep, sp)
+	const char *fn;
+	int fd;
+	register EXEC *ep;
+	struct stat *sp;
+{
+	register char *neweof, *mineof;
+	int zmagic;
+
+	zmagic = ep->a_data &&
+		 (N_GETMAGIC(*ep) == ZMAGIC || N_GETMAGIC(*ep) == QMAGIC);
+
+	/*
+	 * If no symbols or data/text relocation info and
+	 * the file data segment size is already minimized, quit.
+	 */
+	if (!ep->a_syms && !ep->a_trsize && !ep->a_drsize) {
+#if 0
+		if (!zmagic)
+			return 0;
+		if (sp->st_size < N_TRELOFF(*ep))
+#endif
+			return 0;
+	}
+
+	/*
+	 * New file size is the header plus text and data segments; OMAGIC
+	 * and NMAGIC formats have the text/data immediately following the
+	 * header.  ZMAGIC format wastes the rest of of header page.
+	 */
+	neweof = (char *)ep + N_TRELOFF(*ep);
+
+#if 0
+	/*
+	 * Unfortunately, this can't work correctly without changing the way
+	 * the loader works.  We could cap it at one page, or even fiddle with
+	 * a_data and a_bss, but this only works for CLBYTES == NBPG.  If we
+	 * are on a system where, e.g., CLBYTES is 8k and NBPG is 4k, and we
+	 * happen to remove 4.5k, we will lose.  And we really don't want to
+	 * fiddle with pages, because that breaks binary compatibility.  Lose.
+	 */
+
+	if (zmagic) {
+		/*
+		 * Get rid of unneeded zeroes at the end of the data segment
+		 * to reduce the file size even more.
+		 */
+		mineof = (char *)ep + N_DATOFF(*ep);
+		while (neweof > mineof && neweof[-1] == '\0')
+			neweof--;
+	}
+#endif
+
+	/* Set symbol size and relocation info values to 0. */
+	ep->a_syms = ep->a_trsize = ep->a_drsize = 0;
+
+	/* Truncate the file. */
+	if (ftruncate(fd, neweof - (char *)ep)) {
+		err("%s: %s", fn, strerror(errno));
+		return 1;
+	}
+
+	return 0;
+}
+
+int
+s_stab(fn, fd, ep, sp)
+	const char *fn;
+	int fd;
+	EXEC *ep;
+	struct stat *sp;
+{
+	register int cnt, len, nsymcnt;
+	register char *nstr, *nstrbase, *p, *strbase;
+	register NLIST *sym, *nsym;
+	NLIST *symbase;
+
+	/* Quit if no symbols. */
+	if (ep->a_syms == 0)
+		return 0;
+
+	if (N_SYMOFF(*ep) >= sp->st_size) {
+		err("%s: bad symbol table", fn);
+		return 1;
+	}
+
+	/*
+	 * Initialize old and new symbol pointers.  They both point to the
+	 * beginning of the symbol table in memory, since we're deleting
+	 * entries.
+	 */
+	sym = nsym = symbase = (NLIST *)((char *)ep + N_SYMOFF(*ep));
+
+	/*
+	 * Allocate space for the new string table, initialize old and
+	 * new string pointers.  Handle the extra long at the beginning
+	 * of the string table.
+	 */
+	strbase = (char *)ep + N_STROFF(*ep);
+	if ((nstrbase = malloc((u_int)*(u_long *)strbase)) == NULL) {
+		err("%s", strerror(ENOMEM));
+		return 1;
+	}
+	nstr = nstrbase + sizeof(u_long);
+
+	/*
+	 * Read through the symbol table.  For each non-debugging symbol,
+	 * copy it and save its string in the new string table.  Keep
+	 * track of the number of symbols.
+	 */
+	for (cnt = ep->a_syms / sizeof(NLIST); cnt--; ++sym)
+		if (!(sym->n_type & N_STAB) && sym->strx) {
+			*nsym = *sym;
+			nsym->strx = nstr - nstrbase;
+			p = strbase + sym->strx;
+                        if (xflag && 
+                            (!(sym->n_type & N_EXT) ||
+                             (sym->n_type & ~N_EXT) == N_FN ||
+                             strcmp(p, "gcc_compiled.") == 0 ||
+                             strcmp(p, "gcc2_compiled.") == 0 ||
+                             strncmp(p, "___gnu_compiled_", 16) == 0)) {
+                                continue;
+                        }
+			len = strlen(p) + 1;
+			bcopy(p, nstr, len);
+			nstr += len;
+			++nsym;
+		}
+
+	/* Fill in new symbol table size. */
+	ep->a_syms = (nsym - symbase) * sizeof(NLIST);
+
+	/* Fill in the new size of the string table. */
+	*(u_long *)nstrbase = len = nstr - nstrbase;
+
+	/*
+	 * Copy the new string table into place.  Nsym should be pointing
+	 * at the address past the last symbol entry.
+	 */
+	bcopy(nstrbase, (void *)nsym, len);
+	free(nstrbase);
+
+	/* Truncate to the current length. */
+	if (ftruncate(fd, (char *)nsym + len - (char *)ep)) {
+		err("%s: %s", fn, strerror(errno));
+		return 1;
+	}
+
+	return 0;
+}
+
+void
+usage()
+{
+	(void)fprintf(stderr, "usage: strip [-dx] file ...\n");
+	exit(1);
+}
+
+#if __STDC__
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+
+void
+#if __STDC__
+err(const char *fmt, ...)
+#else
+err(fmt, va_alist)
+	char *fmt;
+        va_dcl
+#endif
+{
+	va_list ap;
+#if __STDC__
+	va_start(ap, fmt);
+#else
+	va_start(ap);
+#endif
+	(void)fprintf(stderr, "strip: ");
+	(void)vfprintf(stderr, fmt, ap);
+	va_end(ap);
+	(void)fprintf(stderr, "\n");
+}