+++ /dev/null
-/* This file is a modified version of 'a.out.h'. It is to be used in all
- GNU tools modified to support the i80960 (or tools that operate on
- object files created by such tools).
-
- Copyright (C) 2001-2025 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
- MA 02110-1301, USA. */
-
-/* All i80960 development is done in a CROSS-DEVELOPMENT environment. I.e.,
- object code is generated on, and executed under the direction of a symbolic
- debugger running on, a host system. We do not want to be subject to the
- vagaries of which host it is or whether it supports COFF or a.out format,
- or anything else. We DO want to:
-
- o always generate the same format object files, regardless of host.
-
- o have an 'a.out' header that we can modify for our own purposes
- (the 80960 is typically an embedded processor and may require
- enhanced linker support that the normal a.out.h header can't
- accommodate).
-
- As for byte-ordering, the following rules apply:
-
- o Text and data that is actually downloaded to the target is always
- in i80960 (little-endian) order.
-
- o All other numbers (in the header, symbols, relocation directives)
- are in host byte-order: object files CANNOT be lifted from a
- little-end host and used on a big-endian (or vice versa) without
- modification.
- ==> THIS IS NO LONGER TRUE USING BFD. WE CAN GENERATE ANY BYTE ORDER
- FOR THE HEADER, AND READ ANY BYTE ORDER. PREFERENCE WOULD BE TO
- USE LITTLE-ENDIAN BYTE ORDER THROUGHOUT, REGARDLESS OF HOST. <==
-
- o The downloader ('comm960') takes care to generate a pseudo-header
- with correct (i80960) byte-ordering before shipping text and data
- off to the NINDY monitor in the target systems. Symbols and
- relocation info are never sent to the target. */
-
-#define BMAGIC 0415
-/* We don't accept the following (see N_BADMAG macro).
- They're just here so GNU code will compile. */
-#define OMAGIC 0407 /* old impure format */
-#define NMAGIC 0410 /* read-only text */
-#define ZMAGIC 0413 /* demand load format */
-
-/* FILE HEADER
- All 'lengths' are given as a number of bytes.
- All 'alignments' are for relinkable files only; an alignment of
- 'n' indicates the corresponding segment must begin at an
- address that is a multiple of (2**n). */
-struct external_exec
- {
- /* Standard stuff */
- unsigned char e_info[4]; /* Identifies this as a b.out file */
- unsigned char e_text[4]; /* Length of text */
- unsigned char e_data[4]; /* Length of data */
- unsigned char e_bss[4]; /* Length of uninitialized data area */
- unsigned char e_syms[4]; /* Length of symbol table */
- unsigned char e_entry[4]; /* Runtime start address */
- unsigned char e_trsize[4]; /* Length of text relocation info */
- unsigned char e_drsize[4]; /* Length of data relocation info */
-
- /* Added for i960 */
- unsigned char e_tload[4]; /* Text runtime load address */
- unsigned char e_dload[4]; /* Data runtime load address */
- unsigned char e_talign[1]; /* Alignment of text segment */
- unsigned char e_dalign[1]; /* Alignment of data segment */
- unsigned char e_balign[1]; /* Alignment of bss segment */
- unsigned char e_relaxable[1];/* Assembled with enough info to allow linker to relax */
- };
-
-#define EXEC_BYTES_SIZE (sizeof (struct external_exec))
-
-/* These macros use the a_xxx field names, since they operate on the exec
- structure after it's been byte-swapped and realigned on the host machine. */
-#define N_BADMAG(x) (((x)->a_info)!=BMAGIC)
-#define N_TXTOFF(x) EXEC_BYTES_SIZE
-#define N_DATOFF(x) ( N_TXTOFF(x) + (x)->a_text )
-#define N_TROFF(x) ( N_DATOFF(x) + (x)->a_data )
-#define N_TRELOFF N_TROFF
-#define N_DROFF(x) ( N_TROFF(x) + (x)->a_trsize )
-#define N_DRELOFF N_DROFF
-#define N_SYMOFF(x) ( N_DROFF(x) + (x)->a_drsize )
-#define N_STROFF(x) ( N_SYMOFF(x) + (x)->a_syms )
-#define N_DATADDR(x) ( (x)->a_dload )
-
-/* Address of text segment in memory after it is loaded. */
-#if !defined (N_TXTADDR)
-#define N_TXTADDR(x) 0
-#endif
-
-/* A single entry in the symbol table. */
-struct nlist
- {
- union
- {
- char* n_name;
- struct nlist * n_next;
- long n_strx; /* Index into string table */
- } n_un;
-
- unsigned char n_type; /* See below */
- char n_other; /* Used in i80960 support -- see below */
- short n_desc;
- unsigned long n_value;
- };
-
-
-/* Legal values of n_type. */
-#define N_UNDF 0 /* Undefined symbol */
-#define N_ABS 2 /* Absolute symbol */
-#define N_TEXT 4 /* Text symbol */
-#define N_DATA 6 /* Data symbol */
-#define N_BSS 8 /* BSS symbol */
-#define N_FN 31 /* Filename symbol */
-
-#define N_EXT 1 /* External symbol (OR'd in with one of above) */
-#define N_TYPE 036 /* Mask for all the type bits */
-#define N_STAB 0340 /* Mask for all bits used for SDB entries */
-
-/* MEANING OF 'n_other'
-
- If non-zero, the 'n_other' fields indicates either a leaf procedure or
- a system procedure, as follows:
-
- 1 <= n_other <= 32 :
- The symbol is the entry point to a system procedure.
- 'n_value' is the address of the entry, as for any other
- procedure. The system procedure number (which can be used in
- a 'calls' instruction) is (n_other-1). These entries come from
- '.sysproc' directives.
-
- n_other == N_CALLNAME
- the symbol is the 'call' entry point to a leaf procedure.
- The *next* symbol in the symbol table must be the corresponding
- 'bal' entry point to the procedure (see following). These
- entries come from '.leafproc' directives in which two different
- symbols are specified (the first one is represented here).
-
-
- n_other == N_BALNAME
- the symbol is the 'bal' entry point to a leaf procedure.
- These entries result from '.leafproc' directives in which only
- one symbol is specified, or in which the same symbol is
- specified twice.
-
- Note that an N_CALLNAME entry *must* have a corresponding N_BALNAME entry,
- but not every N_BALNAME entry must have an N_CALLNAME entry. */
-#define N_CALLNAME ((char)-1)
-#define N_BALNAME ((char)-2)
-#define IS_CALLNAME(x) (N_CALLNAME == (x))
-#define IS_BALNAME(x) (N_BALNAME == (x))
-#define IS_OTHER(x) ((x)>0 && (x) <=32)
-
-#define b_out_relocation_info relocation_info
-struct relocation_info
- {
- int r_address; /* File address of item to be relocated. */
- unsigned
-#define r_index r_symbolnum
- r_symbolnum:24, /* Index of symbol on which relocation is based,
- if r_extern is set. Otherwise set to
- either N_TEXT, N_DATA, or N_BSS to
- indicate section on which relocation is
- based. */
- r_pcrel:1, /* 1 => relocate PC-relative; else absolute
- On i960, pc-relative implies 24-bit
- address, absolute implies 32-bit. */
- r_length:2, /* Number of bytes to relocate:
- 0 => 1 byte
- 1 => 2 bytes -- used for 13 bit pcrel
- 2 => 4 bytes. */
- r_extern:1,
- r_bsr:1, /* Something for the GNU NS32K assembler. */
- r_disp:1, /* Something for the GNU NS32K assembler. */
- r_callj:1, /* 1 if relocation target is an i960 'callj'. */
- r_relaxable:1; /* 1 if enough info is left to relax the data. */
-};
projects / thirdparty / binutils-gdb.git / commitdiff
