| /* COFF specification for OpenRISC 1000. |
| Copyright (C) 1993-2000, 2002 Free Software Foundation, Inc. |
| Contributed by David Wood @ New York University. |
| Modified by Johan Rydberg, <johan.rydberg@netinsight.se> |
| |
| This file is part of BFD, the Binary File Descriptor library. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| #ifndef OR32 |
| # define OR32 |
| #endif |
| |
| /* File Header and related definitions. */ |
| struct external_filehdr |
| { |
| char f_magic[2]; /* magic number */ |
| char f_nscns[2]; /* number of sections */ |
| char f_timdat[4]; /* time & date stamp */ |
| char f_symptr[4]; /* file pointer to symtab */ |
| char f_nsyms[4]; /* number of symtab entries */ |
| char f_opthdr[2]; /* sizeof(optional hdr) */ |
| char f_flags[2]; /* flags */ |
| }; |
| |
| #define FILHDR struct external_filehdr |
| #define FILHSZ 20 |
| |
| /* Magic numbers for OpenRISC 1000. As it is know we use the |
| numbers for Am29000. |
| |
| (AT&T will assign the "real" magic number). */ |
| #define SIPFBOMAGIC 0572 /* Am29000 (Byte 0 is MSB). */ |
| #define SIPRBOMAGIC 0573 /* Am29000 (Byte 0 is LSB). */ |
| |
| #define OR32_MAGIC_BIG SIPFBOMAGIC |
| #define OR32_MAGIC_LITTLE SIPRBOMAGIC |
| #define OR32BADMAG(x) (((x).f_magic!=OR32_MAGIC_BIG) && \ |
| ((x).f_magic!=OR32_MAGIC_LITTLE)) |
| |
| #define OMAGIC OR32_MAGIC_BIG |
| |
| /* Optional (a.out) header. */ |
| typedef struct external_aouthdr |
| { |
| char magic[2]; /* type of file */ |
| char vstamp[2]; /* version stamp */ |
| char tsize[4]; /* text size in bytes, padded to FW bdry */ |
| char dsize[4]; /* initialized data " " */ |
| char bsize[4]; /* uninitialized data " " */ |
| char entry[4]; /* entry pt. */ |
| char text_start[4]; /* base of text used for this file */ |
| char data_start[4]; /* base of data used for this file */ |
| } AOUTHDR; |
| |
| #define AOUTSZ 28 |
| #define AOUTHDRSZ 28 |
| |
| /* aouthdr magic numbers. */ |
| #define NMAGIC 0410 /* separate i/d executable. */ |
| #define SHMAGIC 0406 /* NYU/Ultra3 shared data executable |
| (writable text). */ |
| |
| #define _ETEXT "_etext" |
| |
| /* Section header and related definitions. */ |
| struct external_scnhdr |
| { |
| char s_name[8]; /* section name */ |
| char s_paddr[4]; /* physical address, aliased s_nlib */ |
| char s_vaddr[4]; /* virtual address */ |
| char s_size[4]; /* section size */ |
| char s_scnptr[4]; /* file ptr to raw data for section */ |
| char s_relptr[4]; /* file ptr to relocation */ |
| char s_lnnoptr[4]; /* file ptr to line numbers */ |
| char s_nreloc[2]; /* number of relocation entries */ |
| char s_nlnno[2]; /* number of line number entries */ |
| char s_flags[4]; /* flags */ |
| }; |
| |
| #define SCNHDR struct external_scnhdr |
| #define SCNHSZ 40 |
| |
| /* Names of "special" sections: */ |
| #define _TEXT ".text" |
| #define _DATA ".data" |
| #define _BSS ".bss" |
| #define _LIT ".lit" |
| |
| /* Section types - with additional section type for global |
| registers which will be relocatable for the OpenRISC 1000. |
| |
| In instances where it is necessary for a linker to produce an |
| output file which contains text or data not based at virtual |
| address 0, e.g. for a ROM, then the linker should accept |
| address base information as command input and use PAD sections |
| to skip over unused addresses. */ |
| #define STYP_BSSREG 0x1200 /* Global register area (like STYP_INFO) */ |
| #define STYP_ENVIR 0x2200 /* Environment (like STYP_INFO) */ |
| #define STYP_ABS 0x4000 /* Absolute (allocated, not reloc, loaded) */ |
| |
| /* Relocation information declaration and related definitions: */ |
| struct external_reloc |
| { |
| char r_vaddr[4]; /* (virtual) address of reference */ |
| char r_symndx[4]; /* index into symbol table */ |
| char r_type[2]; /* relocation type */ |
| }; |
| |
| #define RELOC struct external_reloc |
| #define RELSZ 10 /* sizeof (RELOC) */ |
| |
| /* Relocation types for the OpenRISC 1000: */ |
| |
| #define R_ABS 0 /* reference is absolute */ |
| #define R_IREL 030 /* instruction relative (jmp/call) */ |
| #define R_IABS 031 /* instruction absolute (jmp/call) */ |
| #define R_ILOHALF 032 /* instruction low half (const) */ |
| #define R_IHIHALF 033 /* instruction high half (consth) part 1 */ |
| #define R_IHCONST 034 /* instruction high half (consth) part 2 */ |
| /* constant offset of R_IHIHALF relocation */ |
| #define R_BYTE 035 /* relocatable byte value */ |
| #define R_HWORD 036 /* relocatable halfword value */ |
| #define R_WORD 037 /* relocatable word value */ |
| |
| #define R_IGLBLRC 040 /* instruction global register RC */ |
| #define R_IGLBLRA 041 /* instruction global register RA */ |
| #define R_IGLBLRB 042 /* instruction global register RB */ |
| |
| /* |
| NOTE: |
| All the "I" forms refer to 29000 instruction formats. The linker is |
| expected to know how the numeric information is split and/or aligned |
| within the instruction word(s). R_BYTE works for instructions, too. |
| |
| If the parameter to a CONSTH instruction is a relocatable type, two |
| relocation records are written. The first has an r_type of R_IHIHALF |
| (33 octal) and a normal r_vaddr and r_symndx. The second relocation |
| record has an r_type of R_IHCONST (34 octal), a normal r_vaddr (which |
| is redundant), and an r_symndx containing the 32-bit constant offset |
| to the relocation instead of the actual symbol table index. This |
| second record is always written, even if the constant offset is zero. |
| The constant fields of the instruction are set to zero. */ |
| |
| /* Line number entry declaration and related definitions: */ |
| struct external_lineno |
| { |
| union |
| { |
| char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/ |
| char l_paddr[4]; /* (physical) address of line number */ |
| } |
| l_addr; |
| |
| char l_lnno[2]; /* line number */ |
| }; |
| |
| #define LINENO struct external_lineno |
| #define LINESZ 6 /* sizeof (LINENO) */ |
| |
| /* Symbol entry declaration and related definitions: */ |
| #define E_SYMNMLEN 8 /* Number of characters in a symbol name */ |
| |
| struct external_syment |
| { |
| union |
| { |
| char e_name[E_SYMNMLEN]; |
| struct |
| { |
| char e_zeroes[4]; |
| char e_offset[4]; |
| } |
| e; |
| } |
| e; |
| |
| char e_value[4]; |
| char e_scnum[2]; |
| char e_type[2]; |
| char e_sclass[1]; |
| char e_numaux[1]; |
| }; |
| |
| #define SYMENT struct external_syment |
| #define SYMESZ 18 |
| |
| /* Storage class definitions - new classes for global registers: */ |
| #define C_GLBLREG 19 /* global register */ |
| #define C_EXTREG 20 /* external global register */ |
| #define C_DEFREG 21 /* ext. def. of global register */ |
| |
| /* Derived symbol mask/shifts: */ |
| #define N_BTMASK (0xf) |
| #define N_BTSHFT (4) |
| #define N_TMASK (0x30) |
| #define N_TSHIFT (2) |
| |
| /* Auxiliary symbol table entry declaration and related |
| definitions. */ |
| #define E_FILNMLEN 14 /* # characters in a file name */ |
| #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */ |
| |
| union external_auxent |
| { |
| struct |
| { |
| char x_tagndx[4]; /* str, un, or enum tag indx */ |
| union |
| { |
| struct |
| { |
| char x_lnno[2]; /* declaration line number */ |
| char x_size[2]; /* str/union/array size */ |
| } |
| x_lnsz; |
| |
| char x_fsize[4]; /* size of function */ |
| } |
| x_misc; |
| |
| union |
| { |
| struct /* if ISFCN, tag, or .bb */ |
| { |
| char x_lnnoptr[4]; /* ptr to fcn line # */ |
| char x_endndx[4]; /* entry ndx past block end */ |
| } |
| x_fcn; |
| |
| struct /* if ISARY, up to 4 dimen. */ |
| { |
| char x_dimen[E_DIMNUM][2]; |
| } |
| x_ary; |
| } |
| x_fcnary; |
| |
| char x_tvndx[2]; /* tv index */ |
| } |
| x_sym; |
| |
| union |
| { |
| char x_fname[E_FILNMLEN]; |
| |
| struct |
| { |
| char x_zeroes[4]; |
| char x_offset[4]; |
| } |
| x_n; |
| } |
| x_file; |
| |
| struct |
| { |
| char x_scnlen[4]; /* section length */ |
| char x_nreloc[2]; /* # relocation entries */ |
| char x_nlinno[2]; /* # line numbers */ |
| } |
| x_scn; |
| |
| struct |
| { |
| char x_tvfill[4]; /* tv fill value */ |
| char x_tvlen[2]; /* length of .tv */ |
| char x_tvran[2][2]; /* tv range */ |
| } |
| x_tv; /* info about .tv section |
| (in auxent of symbol .tv)) */ |
| }; |
| |
| #define AUXENT union external_auxent |
| #define AUXESZ 18 |