Home | History | Annotate | Line # | Download | only in libsa 
      1 /* $NetBSD: loadfile_ecoff.c,v 1.12 2008/04/28 20:24:06 martin Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1997 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
      9  * NASA Ames Research Center and by Christos Zoulas.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     30  * POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #ifdef _STANDALONE
     34 #include <lib/libsa/stand.h>
     35 #include <lib/libkern/libkern.h>
     36 #else
     37 #include <stdio.h>
     38 #include <string.h>
     39 #include <errno.h>
     40 #include <stdlib.h>
     41 #include <unistd.h>
     42 #include <fcntl.h>
     43 #include <err.h>
     44 #endif
     45 
     46 #include <sys/param.h>
     47 #include <sys/exec.h>
     48 
     49 #include "loadfile.h"
     50 
     51 #ifdef BOOT_ECOFF
     52 
     53 int
     54 loadfile_coff(int fd, struct ecoff_exechdr *coff, u_long *marks, int flags)
     55 {
     56 	paddr_t offset = marks[MARK_START];
     57 	paddr_t minp = ~0, maxp = 0, pos;
     58 	ssize_t nr;
     59 
     60 	/* some ports dont use the offset */
     61 	offset = offset;
     62 
     63 	/* Read in text. */
     64 	if (lseek(fd, ECOFF_TXTOFF(coff), SEEK_SET) == -1)  {
     65 		WARN(("lseek text"));
     66 		return 1;
     67 	}
     68 
     69 	if (coff->a.tsize != 0) {
     70 		if (flags & LOAD_TEXT) {
     71 			PROGRESS(("%lu", coff->a.tsize));
     72 			nr = READ(fd, coff->a.text_start, coff->a.tsize);
     73 			if (nr == -1) {
     74 				return 1;
     75 			}
     76 			if (nr != coff->a.tsize) {
     77 				errno = EIO;
     78 				return 1;
     79 			}
     80 		}
     81 		else {
     82 			if (lseek(fd, coff->a.tsize, SEEK_CUR) == -1) {
     83 				WARN(("read text"));
     84 				return 1;
     85 			}
     86 		}
     87 		if (flags & (COUNT_TEXT|LOAD_TEXT)) {
     88 			pos = coff->a.text_start;
     89 			if (minp > pos)
     90 				minp = pos;
     91 			pos += coff->a.tsize;
     92 			if (maxp < pos)
     93 				maxp = pos;
     94 		}
     95 	}
     96 
     97 	/* Read in data. */
     98 	if (coff->a.dsize != 0) {
     99 		if (flags & LOAD_DATA) {
    100 			PROGRESS(("+%lu", coff->a.dsize));
    101 			nr = READ(fd, coff->a.data_start, coff->a.dsize);
    102 			if (nr == -1) {
    103 				WARN(("read data"));
    104 				return 1;
    105 			}
    106 			if (nr != coff->a.dsize) {
    107 				errno = EIO;
    108 				WARN(("read data"));
    109 				return 1;
    110 			}
    111 		}
    112 		if (flags & (COUNT_DATA|LOAD_DATA)) {
    113 			pos = coff->a.data_start;
    114 			if (minp > pos)
    115 				minp = pos;
    116 			pos += coff->a.dsize;
    117 			if (maxp < pos)
    118 				maxp = pos;
    119 		}
    120 	}
    121 
    122 	/* Zero out bss. */
    123 	if (coff->a.bsize != 0) {
    124 		if (flags & LOAD_BSS) {
    125 			PROGRESS(("+%lu", coff->a.bsize));
    126 			BZERO(coff->a.bss_start, coff->a.bsize);
    127 		}
    128 		if (flags & (COUNT_BSS|LOAD_BSS)) {
    129 			pos = coff->a.bss_start;
    130 			if (minp > pos)
    131 				minp = pos;
    132 			pos = coff->a.bsize;
    133 			if (maxp < pos)
    134 				maxp = pos;
    135 		}
    136 	}
    137 
    138 	marks[MARK_START] = LOADADDR(minp);
    139 	marks[MARK_ENTRY] = LOADADDR(coff->a.entry);
    140 	marks[MARK_NSYM] = 1;	/* XXX: Kernel needs >= 0 */
    141 	marks[MARK_SYM] = LOADADDR(maxp);
    142 	marks[MARK_END] = LOADADDR(maxp);
    143 	marks[MARK_DATA] = LOADADDR(coff->a.data_start);
    144 	return 0;
    145 }
    146 
    147 #endif /* BOOT_ECOFF */
    148