libexec/ld.aout_so/arch/vax/md.h

   1 /*      $NetBSD: md.h,v 1.12 2002/12/10 17:14:44 thorpej Exp $  */
   2
   3 /*-
   4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Paul Kranenburg.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #if defined(CROSS_LINKER) && defined(XHOST) && XHOST==sparc
  33 #define NEED_SWAP
  34 #endif
  35
  36 #define MAX_ALIGNMENT           (sizeof (long))
  37
  38 #ifdef __NetBSD__
  39 #define PAGSIZ                  AOUT_LDPGSZ
  40 #else
  41 #define PAGSIZ                  1024
  42 #endif
  43
  44 #if defined(__NetBSD__) || defined(CROSS_LINKER)
  45
  46 #define N_SET_FLAG(ex,f)        (oldmagic || N_GETMAGIC(ex)==QMAGIC ? (0) : \
  47                                         N_SETMAGIC(ex,                  \
  48                                                    N_GETMAGIC(ex),      \
  49                                                    MID_MACHINE,         \
  50                                                    N_GETFLAG(ex)|(f)))
  51
  52 #define N_IS_DYNAMIC(ex)        ((N_GETFLAG(ex) & EX_DYNAMIC))
  53
  54 #define N_BADMID(ex) \
  55         (N_GETMID(ex) != 0 && N_GETMID(ex) != MID_MACHINE \
  56          && N_GETMID(ex) != MID_VAX1K)
  57
  58 #endif
  59
  60 /*
  61  * FreeBSD does it differently
  62  */
  63 #ifdef FreeBSD
  64 #define N_SET_FLAG(ex,f)        (oldmagic ? (0) :                       \
  65                                   (netzmagic == 0 ?                     \
  66                                         N_SETMAGIC(ex,                  \
  67                                                    N_GETMAGIC(ex),      \
  68                                                    MID_MACHINE,         \
  69                                                    N_GETFLAG(ex)|(f)) : \
  70                                         N_SETMAGIC_NET(ex,              \
  71                                                    N_GETMAGIC_NET(ex),  \
  72                                                    MID_MACHINE,         \
  73                                                    N_GETFLAG_NET(ex)|(f)) ))
  74
  75 #define N_IS_DYNAMIC(ex)        ((N_GETMAGIC_NET(ex) == ZMAGIC) ?       \
  76                                 ((N_GETFLAG_NET(ex) & EX_DYNAMIC)) :    \
  77                                 ((N_GETFLAG(ex) & EX_DYNAMIC) ))
  78 #define N_BADMID(ex) 0
  79 #endif
  80
  81 /*
  82  * Should be handled by a.out.h ?
  83  */
  84 #define N_ADJUST(ex)            (((ex).a_entry < PAGSIZ) ? -PAGSIZ : 0)
  85 #define TEXT_START(ex)          (N_TXTADDR(ex) + N_ADJUST(ex))
  86 #define DATA_START(ex)          (N_DATADDR(ex) + N_ADJUST(ex))
  87
  88 int md_convert_textreloc(struct relocation_info *);
  89
  90
  91 #define RELOC_STATICS_THROUGH_GOT_P(r)          (1)
  92 #define RELOC_EXTERNAL_DATA_THROUGH_GOT_P(r)    (md_convert_textreloc(r))
  93 #define JMPSLOT_NONEXTERN_ARE_INTERMODULE       (1)
  94 #define JMPSLOT_NEEDS_RELOC                     (0)
  95
  96 #define md_got_reloc(r)                 (0)
  97
  98 #define md_get_rt_segment_addend(r,a)   md_get_addend(r,a)
  99
 100 /* Width of a Global Offset Table entry */
 101 #define GOT_ENTRY_SIZE                  4
 102 typedef long    got_t;
 103
 104 /*
 105  *      .word   ^M<reg-mask>
 106  *      jsb     L^addr
 107  *      callg   (ap), L^addr
 108  */
 109 typedef struct jmpslot {
 110         u_short mask;
 111         u_char insn[8];
 112         u_short reloc_index;
 113 } jmpslot_t;
 114
 115 #define JMPSLOT_RELOC_MASK      0xffff
 116 #define BPT     0x0003                  /* Set a breakpoint */
 117
 118 /*
 119  * Byte swap defs for cross linking
 120  */
 121
 122 #if !defined(NEED_SWAP)
 123
 124 #define md_swapin_exec_hdr(h)
 125 #define md_swapout_exec_hdr(h)
 126 #define md_swapin_symbols(s,n)
 127 #define md_swapout_symbols(s,n)
 128 #define md_swapin_zsymbols(s,n)
 129 #define md_swapout_zsymbols(s,n)
 130 #define md_swapin_reloc(r,n)
 131 #define md_swapout_reloc(r,n)
 132 #define md_swapin__dynamic(l)
 133 #define md_swapout__dynamic(l)
 134 #define md_swapin_section_dispatch_table(l)
 135 #define md_swapout_section_dispatch_table(l)
 136 #define md_swapin_so_debug(d)
 137 #define md_swapout_so_debug(d)
 138 #define md_swapin_rrs_hash(f,n)
 139 #define md_swapout_rrs_hash(f,n)
 140 #define md_swapin_sod(l,n)
 141 #define md_swapout_sod(l,n)
 142 #define md_swapout_jmpslot(j,n)
 143 #define md_swapout_got(g,n)
 144 #define md_swapin_ranlib_hdr(h,n)
 145 #define md_swapout_ranlib_hdr(h,n)
 146
 147 #endif /* NEED_SWAP */
 148
 149 #ifdef CROSS_LINKER
 150
 151 #define get_byte(p)     ( ((unsigned char *)(p))[0] )
 152
 153 #define get_short(p)    ( ( ((unsigned char *)(p))[0] << 8) | \
 154                           ( ((unsigned char *)(p))[1]     )   \
 155                         )
 156
 157 #define get_long(p)     ( ( ((unsigned char *)(p))[0] << 24) | \
 158                           ( ((unsigned char *)(p))[1] << 16) | \
 159                           ( ((unsigned char *)(p))[2] << 8 ) | \
 160                           ( ((unsigned char *)(p))[3]      )   \
 161                         )
 162
 163 #define put_byte(p, v)  { ((unsigned char *)(p))[0] = ((unsigned long)(v)); }
 164
 165 #define put_short(p, v) { ((unsigned char *)(p))[0] =                   \
 166                                 ((((unsigned long)(v)) >> 8) & 0xff);   \
 167                           ((unsigned char *)(p))[1] =                   \
 168                                 ((((unsigned long)(v))     ) & 0xff); }
 169
 170 #define put_long(p, v)  { ((unsigned char *)(p))[0] =                   \
 171                                 ((((unsigned long)(v)) >> 24) & 0xff);  \
 172                           ((unsigned char *)(p))[1] =                   \
 173                                 ((((unsigned long)(v)) >> 16) & 0xff);  \
 174                           ((unsigned char *)(p))[2] =                   \
 175                                 ((((unsigned long)(v)) >>  8) & 0xff);  \
 176                           ((unsigned char *)(p))[3] =                   \
 177                                 ((((unsigned long)(v))      ) & 0xff); }
 178
 179 #ifdef NEED_SWAP
 180
 181 /* Define IO byte swapping routines */
 182
 183 void    md_swapin_exec_hdr __P((struct exec *));
 184 void    md_swapout_exec_hdr __P((struct exec *));
 185 void    md_swapin_reloc __P((struct relocation_info *, int));
 186 void    md_swapout_reloc __P((struct relocation_info *, int));
 187 void    md_swapout_jmpslot __P((jmpslot_t *, int));
 188
 189 #define md_swapin_symbols(s,n)                  swap_symbols(s,n)
 190 #define md_swapout_symbols(s,n)                 swap_symbols(s,n)
 191 #define md_swapin_zsymbols(s,n)                 swap_zsymbols(s,n)
 192 #define md_swapout_zsymbols(s,n)                swap_zsymbols(s,n)
 193 #define md_swapin__dynamic(l)                   swap__dynamic(l)
 194 #define md_swapout__dynamic(l)                  swap__dynamic(l)
 195 #define md_swapin_section_dispatch_table(l)     swap_section_dispatch_table(l)
 196 #define md_swapout_section_dispatch_table(l)    swap_section_dispatch_table(l)
 197 #define md_swapin_so_debug(d)                   swap_so_debug(d)
 198 #define md_swapout_so_debug(d)                  swap_so_debug(d)
 199 #define md_swapin_rrs_hash(f,n)                 swap_rrs_hash(f,n)
 200 #define md_swapout_rrs_hash(f,n)                swap_rrs_hash(f,n)
 201 #define md_swapin_sod(l,n)                      swapin_sod(l,n)
 202 #define md_swapout_sod(l,n)                     swapout_sod(l,n)
 203 #define md_swapout_got(g,n)                     swap_longs((long*)(g),n)
 204 #define md_swapin_ranlib_hdr(h,n)               swap_ranlib_hdr(h,n)
 205 #define md_swapout_ranlib_hdr(h,n)              swap_ranlib_hdr(h,n)
 206
 207 #define md_swap_short(x) ( (((x) >> 8) & 0xff) | (((x) & 0xff) << 8) )
 208
 209 #define md_swap_long(x) ( (((x) >> 24) & 0xff    ) | (((x) >> 8 ) & 0xff00   ) | \
 210                         (((x) << 8 ) & 0xff0000) | (((x) << 24) & 0xff000000))
 211
 212 #else   /* We need not swap, but must pay attention to alignment: */
 213
 214 #define md_swap_short(x)        (x)
 215 #define md_swap_long(x)         (x)
 216
 217 #endif /* NEED_SWAP */
 218
 219 #else   /* Not a cross linker: use native */
 220
 221 #define md_swap_short(x)                (x)
 222 #define md_swap_long(x)                 (x)
 223
 224 #define get_byte(where)                 (*(char *)(where))
 225 #define get_short(where)                (*(short *)(where))
 226 #define get_long(where)                 (*(long *)(where))
 227
 228 #define put_byte(where,what)            (*(char *)(where) = (what))
 229 #define put_short(where,what)           (*(short *)(where) = (what))
 230 #define put_long(where,what)            (*(long *)(where) = (what))
 231
 232 #endif /* CROSS_LINKER */