149 lines
4.9 KiB
C
149 lines
4.9 KiB
C
/* COFF spec for AMD 290*0
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Copyright 2001 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
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Contributed by David Wood @ New York University. */
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#ifndef AMD
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# define AMD
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#endif
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#define L_LNNO_SIZE 2
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#include "coff/external.h"
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/*
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** Magic numbers for Am29000
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** (AT&T will assign the "real" magic number)
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*/
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#define SIPFBOMAGIC 0572 /* Am29000 (Byte 0 is MSB) */
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#define SIPRBOMAGIC 0573 /* Am29000 (Byte 0 is LSB) */
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#define A29K_MAGIC_BIG SIPFBOMAGIC
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#define A29K_MAGIC_LITTLE SIPRBOMAGIC
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#define A29KBADMAG(x) ( ((x).f_magic != A29K_MAGIC_BIG) && \
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((x).f_magic != A29K_MAGIC_LITTLE))
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#define OMAGIC A29K_MAGIC_BIG
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/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
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/*
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** File header flags currently known to us.
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**
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** Am29000 will use the F_AR32WR and F_AR32W flags to indicate
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** the byte ordering in the file.
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*/
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/*--------------------------------------------------------------*/
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/* aouthdr magic numbers */
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#define NMAGIC 0410 /* separate i/d executable */
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#define SHMAGIC 0406 /* NYU/Ultra3 shared data executable
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(writable text) */
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#undef _ETEXT
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#define _ETEXT "_etext"
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/*--------------------------------------------------------------*/
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/* More names of "special" sections. */
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#define _LIT ".lit"
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/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
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/*
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** Section types - with additional section type for global
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** registers which will be relocatable for the Am29000.
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**
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** In instances where it is necessary for a linker to produce an
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** output file which contains text or data not based at virtual
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** address 0, e.g. for a ROM, then the linker should accept
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** address base information as command input and use PAD sections
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** to skip over unused addresses.
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*/
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#define STYP_BSSREG 0x1200 /* Global register area (like STYP_INFO) */
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#define STYP_ENVIR 0x2200 /* Environment (like STYP_INFO) */
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#define STYP_ABS 0x4000 /* Absolute (allocated, not reloc, loaded) */
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/*--------------------------------------------------------------*/
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/*
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** Relocation information declaration and related definitions
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*/
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struct external_reloc
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{
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char r_vaddr[4]; /* (virtual) address of reference */
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char r_symndx[4]; /* index into symbol table */
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char r_type[2]; /* relocation type */
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};
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#define RELOC struct external_reloc
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#define RELSZ 10 /* sizeof (RELOC) */
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/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
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/*
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** Relocation types for the Am29000
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*/
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#define R_ABS 0 /* reference is absolute */
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#define R_IREL 030 /* instruction relative (jmp/call) */
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#define R_IABS 031 /* instruction absolute (jmp/call) */
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#define R_ILOHALF 032 /* instruction low half (const) */
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#define R_IHIHALF 033 /* instruction high half (consth) part 1 */
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#define R_IHCONST 034 /* instruction high half (consth) part 2 */
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/* constant offset of R_IHIHALF relocation */
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#define R_BYTE 035 /* relocatable byte value */
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#define R_HWORD 036 /* relocatable halfword value */
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#define R_WORD 037 /* relocatable word value */
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#define R_IGLBLRC 040 /* instruction global register RC */
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#define R_IGLBLRA 041 /* instruction global register RA */
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#define R_IGLBLRB 042 /* instruction global register RB */
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/*
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NOTE:
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All the "I" forms refer to 29000 instruction formats. The linker is
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expected to know how the numeric information is split and/or aligned
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within the instruction word(s). R_BYTE works for instructions, too.
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If the parameter to a CONSTH instruction is a relocatable type, two
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relocation records are written. The first has an r_type of R_IHIHALF
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(33 octal) and a normal r_vaddr and r_symndx. The second relocation
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record has an r_type of R_IHCONST (34 octal), a normal r_vaddr (which
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is redundant), and an r_symndx containing the 32-bit constant offset
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to the relocation instead of the actual symbol table index. This
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second record is always written, even if the constant offset is zero.
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The constant fields of the instruction are set to zero.
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*/
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/*--------------------------------------------------------------*/
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/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
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/*
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** Storage class definitions - new classes for global registers.
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*/
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#define C_GLBLREG 19 /* global register */
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#define C_EXTREG 20 /* external global register */
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#define C_DEFREG 21 /* ext. def. of global register */
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