1 | /**************************************************************************/
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2 | /* COFF.H */
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3 | /* COFF data structures and related definitions used by the linker */
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4 | /**************************************************************************/
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5 |
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6 | /*------------------------------------------------------------------------*/
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7 | /* COFF FILE HEADER */
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8 | /*------------------------------------------------------------------------*/
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9 | struct filehdr {
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10 | unsigned short f_magic; /* magic number */
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11 | unsigned short f_nscns; /* number of sections */
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12 | long f_timdat; /* time & date stamp */
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13 | long f_symptr; /* file pointer to symtab */
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14 | long f_nsyms; /* number of symtab entries */
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15 | unsigned short f_opthdr; /* sizeof(optional hdr) */
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16 | unsigned short f_flags; /* flags */
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17 | unsigned short f_TargetID; /* for C6x = 0x0099 */
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18 | };
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19 |
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20 | /*------------------------------------------------------------------------*/
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21 | /* File header flags */
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22 | /*------------------------------------------------------------------------*/
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23 | #define F_RELFLG 0x01 /* relocation info stripped from file */
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24 | #define F_EXEC 0x02 /* file is executable (no unresolved refs) */
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25 | #define F_LNNO 0x04 /* line nunbers stripped from file */
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26 | #define F_LSYMS 0x08 /* local symbols stripped from file */
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27 | #define F_GSP10 0x10 /* 34010 version */
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28 | #define F_GSP20 0x20 /* 34020 version */
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29 | #define F_SWABD 0x40 /* bytes swabbed (in names) */
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30 | #define F_AR16WR 0x80 /* byte ordering of an AR16WR (PDP-11) */
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31 | #define F_LITTLE 0x100 /* byte ordering of an AR32WR (vax) */
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32 | #define F_BIG 0x200 /* byte ordering of an AR32W (3B, maxi) */
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33 | #define F_PATCH 0x400 /* contains "patch" list in optional header */
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34 | #define F_NODF 0x400
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35 |
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36 | #define F_VERSION (F_GSP10 | F_GSP20)
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37 | #define F_BYTE_ORDER (F_LITTLE | F_BIG)
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38 | #define FILHDR struct filehdr
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39 |
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40 | //#define FILHSZ sizeof(FILHDR)
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41 | #define FILHSZ 22 // above rounds to align on 4 bytes which causes problems
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42 |
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43 | #define COFF_C67_MAGIC 0x00c2
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44 |
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45 | /*------------------------------------------------------------------------*/
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46 | /* Macros to recognize magic numbers */
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47 | /*------------------------------------------------------------------------*/
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48 | #define ISMAGIC(x) (((unsigned short)(x))==(unsigned short)magic)
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49 | #define ISARCHIVE(x) ((((unsigned short)(x))==(unsigned short)ARTYPE))
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50 | #define BADMAGIC(x) (((unsigned short)(x) & 0x8080) && !ISMAGIC(x))
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51 |
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52 | |
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53 |
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54 | /*------------------------------------------------------------------------*/
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55 | /* OPTIONAL FILE HEADER */
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56 | /*------------------------------------------------------------------------*/
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57 | typedef struct aouthdr {
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58 | short magic; /* see magic.h */
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59 | short vstamp; /* version stamp */
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60 | long tsize; /* text size in bytes, padded to FW bdry*/
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61 | long dsize; /* initialized data " " */
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62 | long bsize; /* uninitialized data " " */
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63 | long entrypt; /* entry pt. */
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64 | long text_start; /* base of text used for this file */
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65 | long data_start; /* base of data used for this file */
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66 | } AOUTHDR;
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67 |
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68 | #define AOUTSZ sizeof(AOUTHDR)
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69 |
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70 | /*----------------------------------------------------------------------*/
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71 | /* When a UNIX aout header is to be built in the optional header, */
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72 | /* the following magic numbers can appear in that header: */
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73 | /* */
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74 | /* AOUT1MAGIC : default : readonly sharable text segment */
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75 | /* AOUT2MAGIC: : writable text segment */
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76 | /* PAGEMAGIC : : configured for paging */
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77 | /*----------------------------------------------------------------------*/
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78 | #define AOUT1MAGIC 0410
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79 | #define AOUT2MAGIC 0407
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80 | #define PAGEMAGIC 0413
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81 |
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82 | |
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83 |
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84 | /*------------------------------------------------------------------------*/
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85 | /* COMMON ARCHIVE FILE STRUCTURES */
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86 | /* */
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87 | /* ARCHIVE File Organization: */
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88 | /* _______________________________________________ */
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89 | /* |__________ARCHIVE_MAGIC_STRING_______________| */
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90 | /* |__________ARCHIVE_FILE_MEMBER_1______________| */
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91 | /* | | */
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92 | /* | Archive File Header "ar_hdr" | */
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93 | /* |.............................................| */
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94 | /* | Member Contents | */
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95 | /* | 1. External symbol directory | */
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96 | /* | 2. Text file | */
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97 | /* |_____________________________________________| */
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98 | /* |________ARCHIVE_FILE_MEMBER_2________________| */
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99 | /* | "ar_hdr" | */
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100 | /* |.............................................| */
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101 | /* | Member Contents (.o or text file) | */
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102 | /* |_____________________________________________| */
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103 | /* | . . . | */
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104 | /* | . . . | */
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105 | /* | . . . | */
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106 | /* |_____________________________________________| */
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107 | /* |________ARCHIVE_FILE_MEMBER_n________________| */
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108 | /* | "ar_hdr" | */
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109 | /* |.............................................| */
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110 | /* | Member Contents | */
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111 | /* |_____________________________________________| */
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112 | /* */
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113 | /*------------------------------------------------------------------------*/
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114 |
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115 | #define COFF_ARMAG "!<arch>\n"
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116 | #define SARMAG 8
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117 | #define ARFMAG "`\n"
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118 |
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119 | struct ar_hdr /* archive file member header - printable ascii */
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120 | {
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121 | char ar_name[16]; /* file member name - `/' terminated */
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122 | char ar_date[12]; /* file member date - decimal */
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123 | char ar_uid[6]; /* file member user id - decimal */
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124 | char ar_gid[6]; /* file member group id - decimal */
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125 | char ar_mode[8]; /* file member mode - octal */
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126 | char ar_size[10]; /* file member size - decimal */
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127 | char ar_fmag[2]; /* ARFMAG - string to end header */
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128 | };
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129 |
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130 | |
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131 |
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132 | /*------------------------------------------------------------------------*/
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133 | /* SECTION HEADER */
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134 | /*------------------------------------------------------------------------*/
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135 | struct scnhdr {
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136 | char s_name[8]; /* section name */
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137 | long s_paddr; /* physical address */
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138 | long s_vaddr; /* virtual address */
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139 | long s_size; /* section size */
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140 | long s_scnptr; /* file ptr to raw data for section */
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141 | long s_relptr; /* file ptr to relocation */
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142 | long s_lnnoptr; /* file ptr to line numbers */
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143 | unsigned int s_nreloc; /* number of relocation entries */
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144 | unsigned int s_nlnno; /* number of line number entries */
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145 | unsigned int s_flags; /* flags */
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146 | unsigned short s_reserved; /* reserved byte */
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147 | unsigned short s_page; /* memory page id */
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148 | };
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149 |
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150 | #define SCNHDR struct scnhdr
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151 | #define SCNHSZ sizeof(SCNHDR)
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152 |
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153 | /*------------------------------------------------------------------------*/
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154 | /* Define constants for names of "special" sections */
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155 | /*------------------------------------------------------------------------*/
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156 | //#define _TEXT ".text"
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157 | #define _DATA ".data"
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158 | #define _BSS ".bss"
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159 | #define _CINIT ".cinit"
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160 | #define _TV ".tv"
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161 |
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162 | /*------------------------------------------------------------------------*/
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163 | /* The low 4 bits of s_flags is used as a section "type" */
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164 | /*------------------------------------------------------------------------*/
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165 | #define STYP_REG 0x00 /* "regular" : allocated, relocated, loaded */
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166 | #define STYP_DSECT 0x01 /* "dummy" : not allocated, relocated, not loaded */
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167 | #define STYP_NOLOAD 0x02 /* "noload" : allocated, relocated, not loaded */
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168 | #define STYP_GROUP 0x04 /* "grouped" : formed of input sections */
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169 | #define STYP_PAD 0x08 /* "padding" : not allocated, not relocated, loaded */
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170 | #define STYP_COPY 0x10 /* "copy" : used for C init tables -
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171 | not allocated, relocated,
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172 | loaded; reloc & lineno
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173 | entries processed normally */
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174 | #define STYP_TEXT 0x20 /* section contains text only */
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175 | #define STYP_DATA 0x40 /* section contains data only */
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176 | #define STYP_BSS 0x80 /* section contains bss only */
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177 |
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178 | #define STYP_ALIGN 0x100 /* align flag passed by old version assemblers */
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179 | #define ALIGN_MASK 0x0F00 /* part of s_flags that is used for align vals */
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180 | #define ALIGNSIZE(x) (1 << ((x & ALIGN_MASK) >> 8))
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181 |
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182 | |
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183 |
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184 | /*------------------------------------------------------------------------*/
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185 | /* RELOCATION ENTRIES */
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186 | /*------------------------------------------------------------------------*/
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187 | struct reloc
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188 | {
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189 | long r_vaddr; /* (virtual) address of reference */
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190 | short r_symndx; /* index into symbol table */
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191 | unsigned short r_disp; /* additional bits for address calculation */
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192 | unsigned short r_type; /* relocation type */
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193 | };
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194 |
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195 | #define RELOC struct reloc
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196 | #define RELSZ 10 /* sizeof(RELOC) */
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197 |
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198 | /*--------------------------------------------------------------------------*/
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199 | /* define all relocation types */
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200 | /*--------------------------------------------------------------------------*/
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201 |
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202 | #define R_ABS 0 /* absolute address - no relocation */
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203 | #define R_DIR16 01 /* UNUSED */
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204 | #define R_REL16 02 /* UNUSED */
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205 | #define R_DIR24 04 /* UNUSED */
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206 | #define R_REL24 05 /* 24 bits, direct */
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207 | #define R_DIR32 06 /* UNUSED */
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208 | #define R_RELBYTE 017 /* 8 bits, direct */
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209 | #define R_RELWORD 020 /* 16 bits, direct */
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210 | #define R_RELLONG 021 /* 32 bits, direct */
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211 | #define R_PCRBYTE 022 /* 8 bits, PC-relative */
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212 | #define R_PCRWORD 023 /* 16 bits, PC-relative */
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213 | #define R_PCRLONG 024 /* 32 bits, PC-relative */
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214 | #define R_OCRLONG 030 /* GSP: 32 bits, one's complement direct */
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215 | #define R_GSPPCR16 031 /* GSP: 16 bits, PC relative (in words) */
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216 | #define R_GSPOPR32 032 /* GSP: 32 bits, direct big-endian */
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217 | #define R_PARTLS16 040 /* Brahma: 16 bit offset of 24 bit address*/
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218 | #define R_PARTMS8 041 /* Brahma: 8 bit page of 24 bit address */
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219 | #define R_PARTLS7 050 /* DSP: 7 bit offset of 16 bit address */
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220 | #define R_PARTMS9 051 /* DSP: 9 bit page of 16 bit address */
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221 | #define R_REL13 052 /* DSP: 13 bits, direct */
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222 |
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223 | |
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224 |
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225 | /*------------------------------------------------------------------------*/
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226 | /* LINE NUMBER ENTRIES */
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227 | /*------------------------------------------------------------------------*/
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228 | struct lineno
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229 | {
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230 | union
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231 | {
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232 | long l_symndx ; /* sym. table index of function name
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233 | iff l_lnno == 0 */
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234 | long l_paddr ; /* (physical) address of line number */
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235 | } l_addr ;
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236 | unsigned short l_lnno ; /* line number */
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237 | };
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238 |
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239 | #define LINENO struct lineno
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240 | #define LINESZ 6 /* sizeof(LINENO) */
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241 |
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242 | |
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243 |
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244 | /*------------------------------------------------------------------------*/
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245 | /* STORAGE CLASSES */
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246 | /*------------------------------------------------------------------------*/
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247 | #define C_EFCN -1 /* physical end of function */
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248 | #define C_NULL 0
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249 | #define C_AUTO 1 /* automatic variable */
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250 | #define C_EXT 2 /* external symbol */
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251 | #define C_STAT 3 /* static */
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252 | #define C_REG 4 /* register variable */
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253 | #define C_EXTDEF 5 /* external definition */
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254 | #define C_LABEL 6 /* label */
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255 | #define C_ULABEL 7 /* undefined label */
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256 | #define C_MOS 8 /* member of structure */
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257 | #define C_ARG 9 /* function argument */
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258 | #define C_STRTAG 10 /* structure tag */
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259 | #define C_MOU 11 /* member of union */
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260 | #define C_UNTAG 12 /* union tag */
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261 | #define C_TPDEF 13 /* type definition */
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262 | #define C_USTATIC 14 /* undefined static */
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263 | #define C_ENTAG 15 /* enumeration tag */
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264 | #define C_MOE 16 /* member of enumeration */
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265 | #define C_REGPARM 17 /* register parameter */
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266 | #define C_FIELD 18 /* bit field */
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267 |
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268 | #define C_BLOCK 100 /* ".bb" or ".eb" */
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269 | #define C_FCN 101 /* ".bf" or ".ef" */
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270 | #define C_EOS 102 /* end of structure */
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271 | #define C_FILE 103 /* file name */
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272 | #define C_LINE 104 /* dummy sclass for line number entry */
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273 | #define C_ALIAS 105 /* duplicate tag */
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274 | #define C_HIDDEN 106 /* special storage class for external */
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275 | /* symbols in dmert public libraries */
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276 | |
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277 |
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278 | /*------------------------------------------------------------------------*/
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279 | /* SYMBOL TABLE ENTRIES */
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280 | /*------------------------------------------------------------------------*/
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281 |
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282 | #define SYMNMLEN 8 /* Number of characters in a symbol name */
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283 | #define FILNMLEN 14 /* Number of characters in a file name */
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284 | #define DIMNUM 4 /* Number of array dimensions in auxiliary entry */
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285 |
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286 |
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287 | struct syment
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288 | {
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289 | union
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290 | {
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291 | char _n_name[SYMNMLEN]; /* old COFF version */
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292 | struct
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293 | {
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294 | long _n_zeroes; /* new == 0 */
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295 | long _n_offset; /* offset into string table */
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296 | } _n_n;
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297 | char *_n_nptr[2]; /* allows for overlaying */
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298 | } _n;
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299 | long n_value; /* value of symbol */
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300 | short n_scnum; /* section number */
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301 | unsigned short n_type; /* type and derived type */
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302 | char n_sclass; /* storage class */
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303 | char n_numaux; /* number of aux. entries */
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304 | };
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305 |
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306 | #define n_name _n._n_name
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307 | #define n_nptr _n._n_nptr[1]
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308 | #define n_zeroes _n._n_n._n_zeroes
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309 | #define n_offset _n._n_n._n_offset
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310 |
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311 | /*------------------------------------------------------------------------*/
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312 | /* Relocatable symbols have a section number of the */
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313 | /* section in which they are defined. Otherwise, section */
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314 | /* numbers have the following meanings: */
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315 | /*------------------------------------------------------------------------*/
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316 | #define N_UNDEF 0 /* undefined symbol */
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317 | #define N_ABS -1 /* value of symbol is absolute */
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318 | #define N_DEBUG -2 /* special debugging symbol */
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319 | #define N_TV (unsigned short)-3 /* needs transfer vector (preload) */
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320 | #define P_TV (unsigned short)-4 /* needs transfer vector (postload) */
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321 |
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322 | |
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323 |
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324 | /*------------------------------------------------------------------------*/
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325 | /* The fundamental type of a symbol packed into the low */
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326 | /* 4 bits of the word. */
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327 | /*------------------------------------------------------------------------*/
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328 | #define _EF ".ef"
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329 |
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330 | #define T_NULL 0 /* no type info */
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331 | #define T_ARG 1 /* function argument (only used by compiler) */
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332 | #define T_CHAR 2 /* character */
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333 | #define T_SHORT 3 /* short integer */
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334 | #define T_INT 4 /* integer */
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335 | #define T_LONG 5 /* long integer */
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336 | #define T_FLOAT 6 /* floating point */
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337 | #define T_DOUBLE 7 /* double word */
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338 | #define T_STRUCT 8 /* structure */
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339 | #define T_UNION 9 /* union */
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340 | #define T_ENUM 10 /* enumeration */
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341 | #define T_MOE 11 /* member of enumeration */
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342 | #define T_UCHAR 12 /* unsigned character */
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343 | #define T_USHORT 13 /* unsigned short */
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344 | #define T_UINT 14 /* unsigned integer */
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345 | #define T_ULONG 15 /* unsigned long */
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346 |
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347 | /*------------------------------------------------------------------------*/
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348 | /* derived types are: */
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349 | /*------------------------------------------------------------------------*/
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350 | #define DT_NON 0 /* no derived type */
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351 | #define DT_PTR 1 /* pointer */
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352 | #define DT_FCN 2 /* function */
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353 | #define DT_ARY 3 /* array */
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354 |
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355 | #define MKTYPE(basic, d1,d2,d3,d4,d5,d6) \
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356 | ((basic) | ((d1) << 4) | ((d2) << 6) | ((d3) << 8) |\
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357 | ((d4) << 10) | ((d5) << 12) | ((d6) << 14))
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358 |
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359 | /*------------------------------------------------------------------------*/
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360 | /* type packing constants and macros */
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361 | /*------------------------------------------------------------------------*/
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362 | #define N_BTMASK_COFF 017
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363 | #define N_TMASK_COFF 060
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364 | #define N_TMASK1_COFF 0300
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365 | #define N_TMASK2_COFF 0360
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366 | #define N_BTSHFT_COFF 4
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367 | #define N_TSHIFT_COFF 2
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368 |
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369 | #define BTYPE_COFF(x) ((x) & N_BTMASK_COFF)
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370 | #define ISINT(x) (((x) >= T_CHAR && (x) <= T_LONG) || \
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371 | ((x) >= T_UCHAR && (x) <= T_ULONG) || (x) == T_ENUM)
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372 | #define ISFLT_COFF(x) ((x) == T_DOUBLE || (x) == T_FLOAT)
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373 | #define ISPTR_COFF(x) (((x) & N_TMASK_COFF) == (DT_PTR << N_BTSHFT_COFF))
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374 | #define ISFCN_COFF(x) (((x) & N_TMASK_COFF) == (DT_FCN << N_BTSHFT_COFF))
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375 | #define ISARY_COFF(x) (((x) & N_TMASK_COFF) == (DT_ARY << N_BTSHFT_COFF))
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376 | #define ISTAG_COFF(x) ((x)==C_STRTAG || (x)==C_UNTAG || (x)==C_ENTAG)
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377 |
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378 | #define INCREF_COFF(x) ((((x)&~N_BTMASK_COFF)<<N_TSHIFT_COFF)|(DT_PTR<<N_BTSHFT_COFF)|(x&N_BTMASK_COFF))
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379 | #define DECREF_COFF(x) ((((x)>>N_TSHIFT_COFF)&~N_BTMASK_COFF)|((x)&N_BTMASK_COFF))
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380 |
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381 | |
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382 |
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383 | /*------------------------------------------------------------------------*/
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384 | /* AUXILIARY SYMBOL ENTRY */
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385 | /*------------------------------------------------------------------------*/
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386 | union auxent
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387 | {
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388 | struct
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389 | {
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390 | long x_tagndx; /* str, un, or enum tag indx */
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391 | union
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392 | {
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393 | struct
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394 | {
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395 | unsigned short x_lnno; /* declaration line number */
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396 | unsigned short x_size; /* str, union, array size */
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397 | } x_lnsz;
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398 | long x_fsize; /* size of function */
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399 | } x_misc;
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400 | union
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401 | {
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402 | struct /* if ISFCN, tag, or .bb */
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403 | {
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404 | long x_lnnoptr; /* ptr to fcn line # */
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405 | long x_endndx; /* entry ndx past block end */
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406 | } x_fcn;
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407 | struct /* if ISARY, up to 4 dimen. */
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408 | {
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409 | unsigned short x_dimen[DIMNUM];
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410 | } x_ary;
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411 | } x_fcnary;
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412 | unsigned short x_regcount; /* number of registers used by func */
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413 | } x_sym;
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414 | struct
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415 | {
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416 | char x_fname[FILNMLEN];
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417 | } x_file;
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418 | struct
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419 | {
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420 | long x_scnlen; /* section length */
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421 | unsigned short x_nreloc; /* number of relocation entries */
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422 | unsigned short x_nlinno; /* number of line numbers */
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423 | } x_scn;
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424 | };
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425 |
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426 | #define SYMENT struct syment
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427 | #define SYMESZ 18 /* sizeof(SYMENT) */
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428 |
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429 | #define AUXENT union auxent
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430 | #define AUXESZ 18 /* sizeof(AUXENT) */
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431 |
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432 | /*------------------------------------------------------------------------*/
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433 | /* NAMES OF "SPECIAL" SYMBOLS */
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434 | /*------------------------------------------------------------------------*/
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435 | #define _STEXT ".text"
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436 | #define _ETEXT "etext"
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437 | #define _SDATA ".data"
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438 | #define _EDATA "edata"
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439 | #define _SBSS ".bss"
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440 | #define _END "end"
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441 | #define _CINITPTR "cinit"
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442 |
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443 | /*--------------------------------------------------------------------------*/
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444 | /* ENTRY POINT SYMBOLS */
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445 | /*--------------------------------------------------------------------------*/
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446 | #define _START "_start"
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447 | #define _MAIN "_main"
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448 | /* _CSTART "_c_int00" (defined in params.h) */
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449 |
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450 |
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451 | #define _TVORIG "_tvorig"
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452 | #define _TORIGIN "_torigin"
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453 | #define _DORIGIN "_dorigin"
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454 |
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455 | #define _SORIGIN "_sorigin"
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