diff options
Diffstat (limited to 'include/bout.h')
| -rw-r--r-- | include/bout.h | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/include/bout.h b/include/bout.h deleted file mode 100644 index 8fc28cc3d..000000000 --- a/include/bout.h +++ /dev/null @@ -1,182 +0,0 @@ -/* - * 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). - * - * 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 */ -}; |