[444] | 1 | /* COFF specification for OpenRISC 1000. |
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| 2 | Copyright (C) 1993-2000, 2002, 2010 Free Software Foundation, Inc. |
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| 3 | Contributed by David Wood @ New York University. |
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| 4 | Modified by Johan Rydberg, <johan.rydberg@netinsight.se> |
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| 5 | |
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| 6 | This file is part of BFD, the Binary File Descriptor library. |
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| 7 | |
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| 8 | This program is free software; you can redistribute it and/or modify |
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| 9 | it under the terms of the GNU General Public License as published by |
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| 10 | the Free Software Foundation; either version 3 of the License, or |
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| 11 | (at your option) any later version. |
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| 12 | |
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| 13 | This program is distributed in the hope that it will be useful, |
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| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 16 | GNU General Public License for more details. |
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| 17 | |
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| 18 | You should have received a copy of the GNU General Public License |
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| 19 | along with this program; if not, write to the Free Software |
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| 20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
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| 21 | MA 02110-1301, USA. */ |
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| 22 | |
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| 23 | #ifndef OR32 |
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| 24 | # define OR32 |
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| 25 | #endif |
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| 26 | |
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| 27 | /* File Header and related definitions. */ |
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| 28 | struct external_filehdr |
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| 29 | { |
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| 30 | char f_magic[2]; /* magic number */ |
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| 31 | char f_nscns[2]; /* number of sections */ |
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| 32 | char f_timdat[4]; /* time & date stamp */ |
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| 33 | char f_symptr[4]; /* file pointer to symtab */ |
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| 34 | char f_nsyms[4]; /* number of symtab entries */ |
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| 35 | char f_opthdr[2]; /* sizeof(optional hdr) */ |
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| 36 | char f_flags[2]; /* flags */ |
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| 37 | }; |
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| 38 | |
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| 39 | #define FILHDR struct external_filehdr |
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| 40 | #define FILHSZ 20 |
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| 41 | |
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| 42 | /* Magic numbers for OpenRISC 1000. As it is know we use the |
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| 43 | numbers for Am29000. |
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| 44 | |
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| 45 | (AT&T will assign the "real" magic number). */ |
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| 46 | #define SIPFBOMAGIC 0572 /* Am29000 (Byte 0 is MSB). */ |
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| 47 | #define SIPRBOMAGIC 0573 /* Am29000 (Byte 0 is LSB). */ |
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| 48 | |
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| 49 | #define OR32_MAGIC_BIG SIPFBOMAGIC |
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| 50 | #define OR32_MAGIC_LITTLE SIPRBOMAGIC |
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| 51 | #define OR32BADMAG(x) (((x).f_magic!=OR32_MAGIC_BIG) && \ |
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| 52 | ((x).f_magic!=OR32_MAGIC_LITTLE)) |
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| 53 | |
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| 54 | #define OMAGIC OR32_MAGIC_BIG |
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| 55 | |
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| 56 | /* Optional (a.out) header. */ |
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| 57 | typedef struct external_aouthdr |
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| 58 | { |
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| 59 | char magic[2]; /* type of file */ |
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| 60 | char vstamp[2]; /* version stamp */ |
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| 61 | char tsize[4]; /* text size in bytes, padded to FW bdry */ |
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| 62 | char dsize[4]; /* initialized data " " */ |
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| 63 | char bsize[4]; /* uninitialized data " " */ |
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| 64 | char entry[4]; /* entry pt. */ |
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| 65 | char text_start[4]; /* base of text used for this file */ |
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| 66 | char data_start[4]; /* base of data used for this file */ |
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| 67 | } AOUTHDR; |
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| 68 | |
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| 69 | #define AOUTSZ 28 |
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| 70 | #define AOUTHDRSZ 28 |
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| 71 | |
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| 72 | /* aouthdr magic numbers. */ |
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| 73 | #define NMAGIC 0410 /* separate i/d executable. */ |
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| 74 | #define SHMAGIC 0406 /* NYU/Ultra3 shared data executable |
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| 75 | (writable text). */ |
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| 76 | |
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| 77 | #define _ETEXT "_etext" |
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| 78 | |
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| 79 | /* Section header and related definitions. */ |
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| 80 | struct external_scnhdr |
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| 81 | { |
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| 82 | char s_name[8]; /* section name */ |
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| 83 | char s_paddr[4]; /* physical address, aliased s_nlib */ |
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| 84 | char s_vaddr[4]; /* virtual address */ |
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| 85 | char s_size[4]; /* section size */ |
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| 86 | char s_scnptr[4]; /* file ptr to raw data for section */ |
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| 87 | char s_relptr[4]; /* file ptr to relocation */ |
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| 88 | char s_lnnoptr[4]; /* file ptr to line numbers */ |
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| 89 | char s_nreloc[2]; /* number of relocation entries */ |
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| 90 | char s_nlnno[2]; /* number of line number entries */ |
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| 91 | char s_flags[4]; /* flags */ |
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| 92 | }; |
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| 93 | |
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| 94 | #define SCNHDR struct external_scnhdr |
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| 95 | #define SCNHSZ 40 |
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| 96 | |
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| 97 | /* Names of "special" sections: */ |
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| 98 | #define _TEXT ".text" |
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| 99 | #define _DATA ".data" |
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| 100 | #define _BSS ".bss" |
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| 101 | #define _LIT ".lit" |
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| 102 | |
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| 103 | /* Section types - with additional section type for global |
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| 104 | registers which will be relocatable for the OpenRISC 1000. |
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| 105 | |
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| 106 | In instances where it is necessary for a linker to produce an |
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| 107 | output file which contains text or data not based at virtual |
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| 108 | address 0, e.g. for a ROM, then the linker should accept |
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| 109 | address base information as command input and use PAD sections |
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| 110 | to skip over unused addresses. */ |
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| 111 | #define STYP_BSSREG 0x1200 /* Global register area (like STYP_INFO) */ |
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| 112 | #define STYP_ENVIR 0x2200 /* Environment (like STYP_INFO) */ |
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| 113 | #define STYP_ABS 0x4000 /* Absolute (allocated, not reloc, loaded) */ |
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| 114 | |
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| 115 | /* Relocation information declaration and related definitions: */ |
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| 116 | struct external_reloc |
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| 117 | { |
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| 118 | char r_vaddr[4]; /* (virtual) address of reference */ |
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| 119 | char r_symndx[4]; /* index into symbol table */ |
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| 120 | char r_type[2]; /* relocation type */ |
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| 121 | }; |
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| 122 | |
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| 123 | #define RELOC struct external_reloc |
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| 124 | #define RELSZ 10 /* sizeof (RELOC) */ |
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| 125 | |
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| 126 | /* Relocation types for the OpenRISC 1000: */ |
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| 127 | |
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| 128 | #define R_ABS 0 /* reference is absolute */ |
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| 129 | #define R_IREL 030 /* instruction relative (jmp/call) */ |
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| 130 | #define R_IABS 031 /* instruction absolute (jmp/call) */ |
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| 131 | #define R_ILOHALF 032 /* instruction low half (const) */ |
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| 132 | #define R_IHIHALF 033 /* instruction high half (consth) part 1 */ |
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| 133 | #define R_IHCONST 034 /* instruction high half (consth) part 2 */ |
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| 134 | /* constant offset of R_IHIHALF relocation */ |
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| 135 | #define R_BYTE 035 /* relocatable byte value */ |
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| 136 | #define R_HWORD 036 /* relocatable halfword value */ |
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| 137 | #define R_WORD 037 /* relocatable word value */ |
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| 138 | |
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| 139 | #define R_IGLBLRC 040 /* instruction global register RC */ |
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| 140 | #define R_IGLBLRA 041 /* instruction global register RA */ |
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| 141 | #define R_IGLBLRB 042 /* instruction global register RB */ |
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| 142 | |
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| 143 | /* |
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| 144 | NOTE: |
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| 145 | All the "I" forms refer to 29000 instruction formats. The linker is |
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| 146 | expected to know how the numeric information is split and/or aligned |
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| 147 | within the instruction word(s). R_BYTE works for instructions, too. |
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| 148 | |
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| 149 | If the parameter to a CONSTH instruction is a relocatable type, two |
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| 150 | relocation records are written. The first has an r_type of R_IHIHALF |
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| 151 | (33 octal) and a normal r_vaddr and r_symndx. The second relocation |
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| 152 | record has an r_type of R_IHCONST (34 octal), a normal r_vaddr (which |
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| 153 | is redundant), and an r_symndx containing the 32-bit constant offset |
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| 154 | to the relocation instead of the actual symbol table index. This |
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| 155 | second record is always written, even if the constant offset is zero. |
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| 156 | The constant fields of the instruction are set to zero. */ |
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| 157 | |
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| 158 | /* Line number entry declaration and related definitions: */ |
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| 159 | struct external_lineno |
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| 160 | { |
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| 161 | union |
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| 162 | { |
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| 163 | char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/ |
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| 164 | char l_paddr[4]; /* (physical) address of line number */ |
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| 165 | } |
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| 166 | l_addr; |
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| 167 | |
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| 168 | char l_lnno[2]; /* line number */ |
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| 169 | }; |
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| 170 | |
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| 171 | #define LINENO struct external_lineno |
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| 172 | #define LINESZ 6 /* sizeof (LINENO) */ |
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| 173 | |
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| 174 | /* Symbol entry declaration and related definitions: */ |
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| 175 | #define E_SYMNMLEN 8 /* Number of characters in a symbol name */ |
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| 176 | |
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| 177 | struct external_syment |
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| 178 | { |
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| 179 | union |
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| 180 | { |
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| 181 | char e_name[E_SYMNMLEN]; |
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| 182 | struct |
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| 183 | { |
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| 184 | char e_zeroes[4]; |
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| 185 | char e_offset[4]; |
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| 186 | } |
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| 187 | e; |
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| 188 | } |
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| 189 | e; |
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| 190 | |
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| 191 | char e_value[4]; |
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| 192 | char e_scnum[2]; |
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| 193 | char e_type[2]; |
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| 194 | char e_sclass[1]; |
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| 195 | char e_numaux[1]; |
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| 196 | }; |
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| 197 | |
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| 198 | #define SYMENT struct external_syment |
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| 199 | #define SYMESZ 18 |
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| 200 | |
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| 201 | /* Storage class definitions - new classes for global registers: */ |
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| 202 | #define C_GLBLREG 19 /* global register */ |
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| 203 | #define C_EXTREG 20 /* external global register */ |
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| 204 | #define C_DEFREG 21 /* ext. def. of global register */ |
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| 205 | |
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| 206 | /* Derived symbol mask/shifts: */ |
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| 207 | #define N_BTMASK (0xf) |
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| 208 | #define N_BTSHFT (4) |
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| 209 | #define N_TMASK (0x30) |
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| 210 | #define N_TSHIFT (2) |
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| 211 | |
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| 212 | /* Auxiliary symbol table entry declaration and related |
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| 213 | definitions. */ |
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| 214 | #define E_FILNMLEN 14 /* # characters in a file name */ |
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| 215 | #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */ |
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| 216 | |
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| 217 | union external_auxent |
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| 218 | { |
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| 219 | struct |
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| 220 | { |
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| 221 | char x_tagndx[4]; /* str, un, or enum tag indx */ |
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| 222 | union |
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| 223 | { |
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| 224 | struct |
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| 225 | { |
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| 226 | char x_lnno[2]; /* declaration line number */ |
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| 227 | char x_size[2]; /* str/union/array size */ |
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| 228 | } |
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| 229 | x_lnsz; |
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| 230 | |
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| 231 | char x_fsize[4]; /* size of function */ |
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| 232 | } |
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| 233 | x_misc; |
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| 234 | |
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| 235 | union |
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| 236 | { |
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| 237 | struct /* if ISFCN, tag, or .bb */ |
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| 238 | { |
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| 239 | char x_lnnoptr[4]; /* ptr to fcn line # */ |
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| 240 | char x_endndx[4]; /* entry ndx past block end */ |
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| 241 | } |
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| 242 | x_fcn; |
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| 243 | |
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| 244 | struct /* if ISARY, up to 4 dimen. */ |
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| 245 | { |
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| 246 | char x_dimen[E_DIMNUM][2]; |
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| 247 | } |
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| 248 | x_ary; |
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| 249 | } |
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| 250 | x_fcnary; |
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| 251 | |
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| 252 | char x_tvndx[2]; /* tv index */ |
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| 253 | } |
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| 254 | x_sym; |
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| 255 | |
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| 256 | union |
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| 257 | { |
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| 258 | char x_fname[E_FILNMLEN]; |
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| 259 | |
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| 260 | struct |
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| 261 | { |
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| 262 | char x_zeroes[4]; |
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| 263 | char x_offset[4]; |
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| 264 | } |
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| 265 | x_n; |
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| 266 | } |
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| 267 | x_file; |
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| 268 | |
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| 269 | struct |
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| 270 | { |
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| 271 | char x_scnlen[4]; /* section length */ |
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| 272 | char x_nreloc[2]; /* # relocation entries */ |
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| 273 | char x_nlinno[2]; /* # line numbers */ |
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| 274 | } |
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| 275 | x_scn; |
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| 276 | |
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| 277 | struct |
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| 278 | { |
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| 279 | char x_tvfill[4]; /* tv fill value */ |
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| 280 | char x_tvlen[2]; /* length of .tv */ |
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| 281 | char x_tvran[2][2]; /* tv range */ |
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| 282 | } |
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| 283 | x_tv; /* info about .tv section |
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| 284 | (in auxent of symbol .tv)) */ |
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| 285 | }; |
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| 286 | |
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| 287 | #define AUXENT union external_auxent |
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| 288 | #define AUXESZ 18 |
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