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

   1 /*      $NetBSD: md.h,v 1.3 2000/05/28 01:53:12 matt Exp $      */
   2
   3 /*
   4  * Copyright (c) 1995 Wolfgang Solfrank
   5  * Copyright (c) 1995 TooLs GmbH
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by TooLs GmbH.
  19  * 4. The name of the author may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  27  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  28  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34
  35 #define MAX_ALIGNMENT           (sizeof (double))       /* 32??? */
  36
  37 #define PAGSIZ                  AOUT_LDPGSZ
  38
  39 #define N_SET_FLAG(ex,f)        N_SETMAGIC(ex,                  \
  40                                            N_GETMAGIC(ex),      \
  41                                            MID_MACHINE,         \
  42                                            N_GETFLAG(ex)|(f))
  43
  44 #define N_IS_DYNAMIC(ex)        ((N_GETFLAG(ex) & EX_DYNAMIC))
  45
  46 #define N_BADMID(ex)    (N_GETMID(ex) != MID_MACHINE)
  47
  48 /*
  49  * Should be handled by a.out.h ?
  50  */
  51 #define N_ADJUST(ex)            (((ex).a_entry < PAGSIZ) ? -PAGSIZ : 0)
  52 #define TEXT_START(ex)          (N_TXTADDR(ex) + N_ADJUST(ex))
  53 #define DATA_START(ex)          (N_DATADDR(ex) + N_ADJUST(ex))
  54
  55 #define RELOC_ADDRESS(r)                ((r)->r_address)
  56 #define RELOC_EXTERN_P(r)               ((r)->r_extern)
  57 #define RELOC_TYPE(r)                   ((r)->r_symbolnum)
  58 #define RELOC_SYMBOL(r)                 ((r)->r_symbolnum)
  59 #define RELOC_MEMORY_SUB_P(r)           0
  60 #define RELOC_MEMORY_ADD_P(r)           0
  61 #define RELOC_ADD_EXTRA(r)              ((r)->r_addend)
  62 #define RELOC_PCREL_P(r)                                                \
  63         (((r)->r_type >= RELOC_REL24 && (r)->r_type <= RELOC_REL14_NTAKEN) \
  64          || (r)->r_type == RELOC_PLT24                                  \
  65          || (r)->r_type == RELOC_REL32                                  \
  66          || (r)->r_type == RELOC_PLTREL32)
  67 #define RELOC_VALUE_RIGHTSHIFT(r)       (reloc_target_rightshift[(r)->r_type])
  68 #define RELOC_TARGET_SIZE(r)            (reloc_target_size[(r)->r_type])
  69 #define RELOC_TARGET_BITPOS(r)          (reloc_target_bitpos[(r)->r_type])
  70 #define RELOC_TARGET_BITSIZE(r)         (reloc_target_bitsize[(r)->r_type])
  71 #define RELOC_JMPTAB_P(r)                                               \
  72         ((r)->r_type == RELOC_PLT24                                     \
  73          || ((r)->r_type >= RELOC_PLT32                                 \
  74              && (r)->r_type <= RELOC_PLT16_HA))
  75 #define RELOC_BASEREL_P(r)              0
  76 #define RELOC_RELATIVE_P(r)             ((r)->r_type == RELOC_RELATIVE)
  77 #define RELOC_COPY_P(r)                 ((r)->r_type == RELOC_COPY)
  78 #define RELOC_LAZY_P(r)                 ((r)->r_type == RELOC_JMP_SLOT)
  79
  80 #define RELOC_STATICS_THROUGH_GOT_P(r)          1
  81 #define JMPSLOT_NEEDS_RELOC                     1
  82 #define JMPSLOT_NONEXTERN_IS_INTERMODULE        0
  83
  84 #define CHECK_GOT_RELOC(r)                                              \
  85         ((r)->r_type >= RELOC_16_LO                                     \
  86          && (r)->r_type <= RELOC_16_HA)
  87
  88 #define md_got_reloc(r)                 (-(r)->r_address)
  89
  90 #define RELOC_INIT_SEGMENT_RELOC(r)     ((r)->r_type = RELOC_32)
  91
  92 /* Width of a Global Offset Table entry */
  93 typedef long    got_t;
  94
  95 /*
  96  * TO BE DONE!!!
  97  */
  98 typedef struct jmpslot {
  99         u_long  opcode;
 100         u_long  addr;
 101         u_long  reloc_index;
 102 #define JMPSLOT_RELOC_MASK              0xffffffff
 103 } jmpslot_t;
 104
 105 #define NOP     0
 106 #define CALL    0
 107 #define JUMP    0
 108 #define TRAP    0
 109
 110 /*
 111  * Byte swap defs for cross linking
 112  */
 113
 114 #if !defined(NEED_SWAP)
 115
 116 #define md_swapin_exec_hdr(h)
 117 #define md_swapout_exec_hdr(h)
 118 #define md_swapin_symbols(s,n)
 119 #define md_swapout_symbols(s,n)
 120 #define md_swapin_zsymbols(s,n)
 121 #define md_swapout_zsymbols(s,n)
 122 #define md_swapin_reloc(r,n)
 123 #define md_swapout_reloc(r,n)
 124 #define md_swapin__dynamic(l)
 125 #define md_swapout__dynamic(l)
 126 #define md_swapin_section_dispatch_table(l)
 127 #define md_swapout_section_dispatch_table(l)
 128 #define md_swapin_so_debug(d)
 129 #define md_swapout_so_debug(d)
 130 #define md_swapin_rrs_hash(f,n)
 131 #define md_swapout_rrs_hash(f,n)
 132 #define md_swapin_sod(l,n)
 133 #define md_swapout_sod(l,n)
 134 #define md_swapout_jmpslot(j,n)
 135 #define md_swapout_got(g,n)
 136 #define md_swapin_ranlib_hdr(h,n)
 137 #define md_swapout_ranlib_hdr(h,n)
 138
 139 #endif /* NEED_SWAP */
 140
 141 #ifdef CROSS_LINKER
 142
 143 #define get_byte(p)     ( ((unsigned char *)(p))[0] )
 144
 145 #define get_short(p)    ( ( ((unsigned char *)(p))[0] << 8) | \
 146                           ( ((unsigned char *)(p))[1]     )   \
 147                         )
 148
 149 #define get_long(p)     ( ( ((unsigned char *)(p))[0] << 24) | \
 150                           ( ((unsigned char *)(p))[1] << 16) | \
 151                           ( ((unsigned char *)(p))[2] << 8 ) | \
 152                           ( ((unsigned char *)(p))[3]      )   \
 153                         )
 154
 155 #define put_byte(p, v)  { ((unsigned char *)(p))[0] = ((unsigned long)(v)); }
 156
 157 #define put_short(p, v) { ((unsigned char *)(p))[0] =                   \
 158                                 ((((unsigned long)(v)) >> 8) & 0xff);   \
 159                           ((unsigned char *)(p))[1] =                   \
 160                                 ((((unsigned long)(v))     ) & 0xff); }
 161
 162 #define put_long(p, v)  { ((unsigned char *)(p))[0] =                   \
 163                                 ((((unsigned long)(v)) >> 24) & 0xff);  \
 164                           ((unsigned char *)(p))[1] =                   \
 165                                 ((((unsigned long)(v)) >> 16) & 0xff);  \
 166                           ((unsigned char *)(p))[2] =                   \
 167                                 ((((unsigned long)(v)) >>  8) & 0xff);  \
 168                           ((unsigned char *)(p))[3] =                   \
 169                                 ((((unsigned long)(v))      ) & 0xff); }
 170
 171 #ifdef NEED_SWAP
 172
 173 /* Define IO byte swapping routines */
 174
 175 void    md_swapin_exec_hdr __P((struct exec *));
 176 void    md_swapout_exec_hdr __P((struct exec *));
 177 void    md_swapin_reloc __P((struct relocation_info *, int));
 178 void    md_swapout_reloc __P((struct relocation_info *, int));
 179 void    md_swapout_jmpslot __P((jmpslot_t *, int));
 180
 181 #define md_swapin_symbols(s,n)                  swap_symbols(s,n)
 182 #define md_swapout_symbols(s,n)                 swap_symbols(s,n)
 183 #define md_swapin_zsymbols(s,n)                 swap_zsymbols(s,n)
 184 #define md_swapout_zsymbols(s,n)                swap_zsymbols(s,n)
 185 #define md_swapin__dynamic(l)                   swap__dynamic(l)
 186 #define md_swapout__dynamic(l)                  swap__dynamic(l)
 187 #define md_swapin_section_dispatch_table(l)     swap_section_dispatch_table(l)
 188 #define md_swapout_section_dispatch_table(l)    swap_section_dispatch_table(l)
 189 #define md_swapin_so_debug(d)                   swap_so_debug(d)
 190 #define md_swapout_so_debug(d)                  swap_so_debug(d)
 191 #define md_swapin_rrs_hash(f,n)                 swap_rrs_hash(f,n)
 192 #define md_swapout_rrs_hash(f,n)                swap_rrs_hash(f,n)
 193 #define md_swapin_sod(l,n)                      swapin_sod(l,n)
 194 #define md_swapout_sod(l,n)                     swapout_sod(l,n)
 195 #define md_swapout_got(g,n)                     swap_longs((long*)(g),n)
 196 #define md_swapin_ranlib_hdr(h,n)               swap_ranlib_hdr(h,n)
 197 #define md_swapout_ranlib_hdr(h,n)              swap_ranlib_hdr(h,n)
 198
 199 #define md_swap_short(x) ( (((x) >> 8) & 0xff) | (((x) & 0xff) << 8) )
 200
 201 #define md_swap_long(x) ( (((x) >> 24) & 0xff    ) | (((x) >> 8 ) & 0xff00   ) | \
 202                         (((x) << 8 ) & 0xff0000) | (((x) << 24) & 0xff000000))
 203
 204 #else   /* We need not swap, but must pay attention to alignment: */
 205
 206 #define md_swap_short(x)        (x)
 207 #define md_swap_long(x)         (x)
 208
 209 #endif /* NEED_SWAP */
 210
 211 #else   /* Not a cross linker: use native */
 212
 213 #define md_swap_short(x)                (x)
 214 #define md_swap_long(x)                 (x)
 215
 216 #define get_byte(where)                 (*(char *)(where))
 217 #define get_short(where)                (*(short *)(where))
 218 #define get_long(where)                 (*(long *)(where))
 219
 220 #define put_byte(where,what)            (*(char *)(where) = (what))
 221 #define put_short(where,what)           (*(short *)(where) = (what))
 222 #define put_long(where,what)            (*(long *)(where) = (what))
 223
 224 #endif /* CROSS_LINKER */