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
  29 #define PAGE_SIZE       4096
  30 #define SEGMENT_SIZE    PAGE_SIZE
  31
  32 #define DEFAULT_ARCH    bfd_arch_i386
  33 #define MACHTYPE_OK(mtype) ((mtype) == M_386 || (mtype) == M_386_NETBSD || (mtype) == M_UNKNOWN)
  34
  35 #define MY(OP) CAT(netbsd386_,OP)
  36 /* This needs to start with a.out so GDB knows it is an a.out variant.  */
  37 #define TARGETNAME "a.out-netbsd-386"
  38
  39 #define N_MAGIC(ex) \
  40     ( (((ex).a_info)&0xffff0000) ? (ntohl(((ex).a_info))&0xffff) : ((ex).a_info))
  41 #define N_MACHTYPE(ex) \
  42     ( (((ex).a_info)&0xffff0000) ? ((ntohl(((ex).a_info))>>16)&0x03ff) : 0 )
  43 # define N_FLAGS(ex) \
  44     ( (((ex).a_info)&0xffff0000) ? ((ntohl(((ex).a_info))>>26)&0x3f) : 0 )
  45 #define N_SET_INFO(ex, mag,mid,flag) \
  46     ( (ex).a_info = htonl( (((flag)&0x3f)<<26) | (((mid)&0x03ff)<<16) | \
  47     (((mag)&0xffff)) ) )
  48 #define N_SET_MAGIC(exec,magic) \
  49   ((exec).a_info = (((exec).a_info & ~0xffff) | ((magic) & 0xffff)))
  50 #define N_SET_MACHTYPE(exec,machtype) \
  51   ((exec).a_info = \
  52    (((exec).a_info & ~(0x3ff<<16)) | (((machtype)&0xff) << 16)))
  53 #define N_SET_FLAGS(exec, flags) \
  54   ((exec).a_info = ((exec).a_info & 0xffff) | (flags & 0xffff))
  55
  56 #include "bfd.h"
  57 #include "sysdep.h"
  58 #include "libbfd.h"
  59 #include "libaout.h"
  60
  61 #define N_GETMAGIC2(ex) \
  62     ( (((ex).a_info)&0xffff0000) ? (ntohl(((ex).a_info))&0xffff) : \
  63     (((ex).a_info) | 0x10000) )
  64
  65 #define N_TXTADDR(ex)   (N_GETMAGIC2(ex) == (ZMAGIC|0x10000) ? 0 : 4096)
  66 #define N_TXTOFF(ex) \
  67         ( N_GETMAGIC2(ex)==ZMAGIC || N_GETMAGIC2(ex)==(QMAGIC|0x10000) ? \
  68         0 : (N_GETMAGIC2(ex)==(ZMAGIC|0x10000) ? 4096 : EXEC_BYTES_SIZE ))
  69 #define N_ALIGN(ex,x) \
  70         (N_MAGIC(ex) == ZMAGIC || N_MAGIC(ex) == QMAGIC ? \
  71          ((x) + 4096 - 1) & ~(4096 - 1) : (x))
  72 #define N_DATADDR(ex) \
  73         N_ALIGN(ex, N_TXTADDR(ex) + (ex).a_text)
  74 /* Data segment offset. */
  75 #define N_DATOFF(ex) \
  76         N_ALIGN(ex, N_TXTOFF(ex) + (ex).a_text)
  77
  78 /* #define N_BADMAG(x)  n_badmag(N_MAGIC(x)) */
  79
  80 #define NO_SWAP_MAGIC   /* magic number already in correct endian format */
  81
  82 #include "aout-target.h"
  83
  84 #if 0
  85 int
  86 n_badmag(x)
  87 unsigned long x; {
  88   union {
  89     unsigned long l;
  90     unsigned char c[sizeof(unsigned long)];
  91   } l;
  92   unsigned char temp;
  93
  94   printf ("x = %o, OMAGIC = %o, NMAGIC = %o, ZMAGIC = %o, QMAGIC = %o\n",
  95           x, OMAGIC, NMAGIC, ZMAGIC, QMAGIC);
  96
  97   l.l = x;
  98   temp = l.c[0];
  99   l.c[0] = l.c[3];
 100   l.c[3] = temp;
 101   temp = l.c[2];
 102   l.c[2] = l.c[1];
 103   l.c[1] = temp;
 104   printf ("\tbyte-swapped(x) = %o\n", l.l);
 105
 106   return (x != OMAGIC
 107           && x != NMAGIC
 108           && x != ZMAGIC
 109           && x != QMAGIC);
 110 }
 111 #endif
 112