| /* 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 */ |