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Diffstat (limited to 'include/coff/a29k.h')
| -rw-r--r-- | include/coff/a29k.h | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/include/coff/a29k.h b/include/coff/a29k.h new file mode 100644 index 000000000..673e71696 --- /dev/null +++ b/include/coff/a29k.h @@ -0,0 +1,148 @@ +/* COFF spec for AMD 290*0 + + Copyright 2001 Free Software Foundation, Inc. + + 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. + + Contributed by David Wood @ New York University. */ + +#ifndef AMD +# define AMD +#endif + +#define L_LNNO_SIZE 2 +#include "coff/external.h" + +/* +** Magic 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 A29K_MAGIC_BIG SIPFBOMAGIC +#define A29K_MAGIC_LITTLE SIPRBOMAGIC +#define A29KBADMAG(x) ( ((x).f_magic != A29K_MAGIC_BIG) && \ + ((x).f_magic != A29K_MAGIC_LITTLE)) + +#define OMAGIC A29K_MAGIC_BIG +/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/ + +/* +** File header flags currently known to us. +** +** Am29000 will use the F_AR32WR and F_AR32W flags to indicate +** the byte ordering in the file. +*/ + +/*--------------------------------------------------------------*/ + + +/* aouthdr magic numbers */ +#define NMAGIC 0410 /* separate i/d executable */ +#define SHMAGIC 0406 /* NYU/Ultra3 shared data executable + (writable text) */ +#undef _ETEXT +#define _ETEXT "_etext" + +/*--------------------------------------------------------------*/ + + +/* More names of "special" sections. */ +#define _LIT ".lit" + +/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/ + +/* +** Section types - with additional section type for global +** registers which will be relocatable for the Am29000. +** +** 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 Am29000 +*/ + +#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. +*/ + +/*--------------------------------------------------------------*/ + +/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/ + +/* +** 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 */ |