bfd/netbsd386.c

   1 /* BFD back-end for NetBSD/386 a.out-ish binaries.
   2    Copyright (C) 1990, 1991, 1992 Free Software Foundation, Inc.
   3
   4 This file is part of BFD, the Binary File Descriptor library.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 #define BYTES_IN_WORD   4
  21 #define ARCH    32
  22
  23 /* ZMAGIC files never have the header in the text.  */
  24 #define N_HEADER_IN_TEXT(x)     0
  25
  26 /* ZMAGIC files start at address 0.  This does not apply to QMAGIC.  */
  27 #define TEXT_START_ADDR 0
  28 #define N_SHARED_LIB(x) 0
  29
  30 #define PAGE_SIZE       4096
  31 #define SEGMENT_SIZE    PAGE_SIZE
  32
  33 #define DEFAULT_ARCH    bfd_arch_i386
  34 #define MACHTYPE_OK(mtype) ((mtype) == M_386 || (mtype) == M_386_NETBSD || (mtype) == M_UNKNOWN)
  35
  36 #define MY(OP) CAT(netbsd386_,OP)
  37 /* This needs to start with a.out so GDB knows it is an a.out variant.  */
  38 #define TARGETNAME "a.out-netbsd-386"
  39
  40 #define N_MAGIC(ex) \
  41     ( (((ex).a_info)&0xffff0000) ? (ntohl(((ex).a_info))&0xffff) : ((ex).a_info))
  42 #define N_MACHTYPE(ex) \
  43     ( (((ex).a_info)&0xffff0000) ? ((ntohl(((ex).a_info))>>16)&0x03ff) : 0 )
  44 # define N_FLAGS(ex) \
  45     ( (((ex).a_info)&0xffff0000) ? ((ntohl(((ex).a_info))>>26)&0x3f) : 0 )
  46 #define N_SET_INFO(ex, mag,mid,flag) \
  47     ( (ex).a_info = htonl( (((flag)&0x3f)<<26) | (((mid)&0x03ff)<<16) | \
  48     (((mag)&0xffff)) ) )
  49 #define N_SET_MAGIC(exec,magic) \
  50   ((exec).a_info = (((exec).a_info & ~0xffff) | ((magic) & 0xffff)))
  51 #define N_SET_MACHTYPE(exec,machtype) \
  52   ((exec).a_info = \
  53    (((exec).a_info & ~(0x3ff<<16)) | (((machtype)&0xff) << 16)))
  54 #define N_SET_FLAGS(exec, flags) \
  55   ((exec).a_info = ((exec).a_info & 0xffff) | (flags & 0xffff))
  56
  57 #include "bfd.h"
  58 #include "sysdep.h"
  59 #include "libbfd.h"
  60 #include "libaout.h"
  61
  62 #define N_GETMAGIC2(ex) \
  63     ( (((ex).a_info)&0xffff0000) ? (ntohl(((ex).a_info))&0xffff) : \
  64     (((ex).a_info) | 0x10000) )
  65
  66 #define N_TXTADDR(ex)   (N_GETMAGIC2(ex) == (ZMAGIC|0x10000) ? 0 : 4096)
  67 #define N_TXTOFF(ex) \
  68         ( N_GETMAGIC2(ex)==ZMAGIC || N_GETMAGIC2(ex)==(QMAGIC|0x10000) ? \
  69         0 : (N_GETMAGIC2(ex)==(ZMAGIC|0x10000) ? 4096 : EXEC_BYTES_SIZE ))
  70 #define N_ALIGN(ex,x) \
  71         (N_MAGIC(ex) == ZMAGIC || N_MAGIC(ex) == QMAGIC ? \
  72          ((x) + 4096 - 1) & ~(4096 - 1) : (x))
  73 #define N_DATADDR(ex) \
  74         N_ALIGN(ex, N_TXTADDR(ex) + (ex).a_text)
  75 /* Data segment offset. */
  76 #define N_DATOFF(ex) \
  77         N_ALIGN(ex, N_TXTOFF(ex) + (ex).a_text)
  78
  79 /* #define N_BADMAG(x)  n_badmag(N_MAGIC(x)) */
  80
  81 #define NO_SWAP_MAGIC   /* magic number already in correct endian format */
  82
  83 #include "aout-target.h"
  84
  85 #if 0
  86 int
  87 n_badmag(x)
  88 unsigned long x; {
  89   union {
  90     unsigned long l;
  91     unsigned char c[sizeof(unsigned long)];
  92   } l;
  93   unsigned char temp;
  94
  95   printf ("x = %o, OMAGIC = %o, NMAGIC = %o, ZMAGIC = %o, QMAGIC = %o\n",
  96           x, OMAGIC, NMAGIC, ZMAGIC, QMAGIC);
  97
  98   l.l = x;
  99   temp = l.c[0];
 100   l.c[0] = l.c[3];
 101   l.c[3] = temp;
 102   temp = l.c[2];
 103   l.c[2] = l.c[1];
 104   l.c[1] = temp;
 105   printf ("\tbyte-swapped(x) = %o\n", l.l);
 106
 107   return (x != OMAGIC
 108           && x != NMAGIC
 109           && x != ZMAGIC
 110           && x != QMAGIC);
 111 }
 112 #endif
 113