474 lines
15 KiB
C
474 lines
15 KiB
C
/* VMS object file format
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Copyright (C) 1989, 1990, 1991 Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS 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
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published by the Free Software Foundation; either version 2,
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or (at your option) any later version.
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GAS is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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the GNU General Public License for more details.
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You should have received a copy of the GNU General Public
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License along with GAS; see the file COPYING. If not, write
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to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* Tag to validate a.out object file format processing */
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#define OBJ_VMS 1
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#include "targ-cpu.h"
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/* This macro controls subsection alignment within a section.
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*
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* Under VAX/VMS, the linker (and PSECT specifications)
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* take care of correctly aligning the segments.
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* Doing the alignment here (on initialized data) can
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* mess up the calculation of global data PSECT sizes.
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*/
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#define SUB_SEGMENT_ALIGN(SEG) (((SEG) == data_section) ? 0 : 2)
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/* This flag is used to remember whether we are in the const or the
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data section. By and large they are identical, but we set a no-write
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bit for psects in the const section. */
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extern char const_flag;
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/* These are defined in obj-vms.c. */
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extern const short seg_N_TYPE[];
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extern const segT N_TYPE_seg[];
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enum reloc_type
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{
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NO_RELOC, RELOC_32
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};
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#define N_BADMAG(x) (0)
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#define N_TXTOFF(x) ( sizeof(struct exec) )
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#define N_DATOFF(x) ( N_TXTOFF(x) + (x).a_text )
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#define N_TROFF(x) ( N_DATOFF(x) + (x).a_data )
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#define N_DROFF(x) ( N_TROFF(x) + (x).a_trsize )
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#define N_SYMOFF(x) ( N_DROFF(x) + (x).a_drsize )
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#define N_STROFF(x) ( N_SYMOFF(x) + (x).a_syms )
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/* We use this copy of the exec header for VMS. We do not actually use it, but
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what we actually do is let gas fill in the relevant slots, and when we get
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around to writing an obj file, we just pick out what we need. */
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struct exec
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{
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unsigned long a_text; /* length of text, in bytes */
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unsigned long a_data; /* length of data, in bytes */
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unsigned long a_bss; /* length of uninitialized data area for file, in bytes */
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unsigned long a_trsize; /* length of relocation info for text, in bytes */
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unsigned long a_drsize; /* length of relocation info for data, in bytes */
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unsigned long a_entry; /* start address */
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unsigned long a_syms; /* length of symbol table data in file, in bytes */
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};
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typedef struct
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{
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struct exec header; /* a.out header */
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long string_table_size; /* names + '\0' + sizeof(int) */
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}
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object_headers;
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/* A single entry in the symbol table
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*/
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struct nlist
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{
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union
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{
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char *n_name;
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struct nlist *n_next;
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long n_strx; /* Index into string table */
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}
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n_un;
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unsigned char n_type; /* See below */
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char n_other; /* Used in i80960 support -- see below */
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short n_desc;
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unsigned long n_value;
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};
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/* Legal values of n_type
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*/
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#define N_UNDF 0 /* Undefined symbol */
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#define N_ABS 2 /* Absolute symbol */
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#define N_TEXT 4 /* Text symbol */
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#define N_DATA 6 /* Data symbol */
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#define N_BSS 8 /* BSS symbol */
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#define N_FN 31 /* Filename symbol */
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#define N_EXT 1 /* External symbol (OR'd in with one of above) */
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#define N_TYPE 036 /* Mask for all the type bits */
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#define N_STAB 0340 /* Mask for all bits used for SDB entries */
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#define N_GSYM 0x20 /* global symbol: name,,0,type,0 */
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#define N_FNAME 0x22 /* procedure name (f77 kludge): name,,0 */
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#define N_FUN 0x24 /* procedure: name,,0,linenumber,address */
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#define N_STSYM 0x26 /* static symbol: name,,0,type,address */
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#define N_LCSYM 0x28 /* .lcomm symbol: name,,0,type,address */
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#define N_RSYM 0x40 /* register sym: name,,0,type,register */
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#define N_SLINE 0x44 /* src line: 0,,0,linenumber,address */
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#define N_CATCH 0x54 /* */
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#define N_SSYM 0x60 /* structure elt: name,,0,type,struct_offset */
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#define N_SO 0x64 /* source file name: name,,0,0,address */
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#define N_LSYM 0x80 /* local sym: name,,0,type,offset */
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#define N_SOL 0x84 /* #included file name: name,,0,0,address */
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#define N_PSYM 0xa0 /* parameter: name,,0,type,offset */
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#define N_ENTRY 0xa4 /* alternate entry: name,linenumber,address */
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#define N_LBRAC 0xc0 /* left bracket: 0,,0,nesting level,address */
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#define N_RBRAC 0xe0 /* right bracket: 0,,0,nesting level,address */
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#define N_BCOMM 0xe2 /* begin common: name,, */
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#define N_ECOMM 0xe4 /* end common: name,, */
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#define N_ECOML 0xe8 /* end common (local name): ,,address */
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#define N_LENG 0xfe /* second stab entry with length information */
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/* SYMBOL TABLE */
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/* Symbol table entry data type */
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typedef struct nlist obj_symbol_type; /* Symbol table entry */
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/* Symbol table macros and constants */
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/*
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* Macros to extract information from a symbol table entry.
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* This syntaxic indirection allows independence regarding a.out or coff.
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* The argument (s) of all these macros is a pointer to a symbol table entry.
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*/
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/* True if the symbol is external */
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#define S_IS_EXTERNAL(s) ((s)->sy_symbol.n_type & N_EXT)
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/* True if symbol has been defined, ie is in N_{TEXT,DATA,BSS,ABS} or N_EXT */
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#define S_IS_DEFINED(s) (S_GET_TYPE(s) != N_UNDF)
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#define S_IS_REGISTER(s) ((s)->sy_symbol.n_type == N_REGISTER)
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/* True if a debug special symbol entry */
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#define S_IS_DEBUG(s) ((s)->sy_symbol.n_type & N_STAB)
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/* True if a symbol is local symbol name */
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/* A symbol name whose name begin with ^A is a gas internal pseudo symbol
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nameless symbols come from .stab directives. */
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#define S_IS_LOCAL(s) (S_GET_NAME(s) && \
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!S_IS_DEBUG(s) && \
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(S_GET_NAME(s)[0] == '\001' || \
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(S_LOCAL_NAME(s) && !flagseen['L'])))
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/* True if a symbol is not defined in this file */
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#define S_IS_EXTERN(s) ((s)->sy_symbol.n_type & N_EXT)
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/* True if the symbol has been generated because of a .stabd directive */
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#define S_IS_STABD(s) (S_GET_NAME(s) == (char *)0)
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/* Accessors */
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/* The value of the symbol */
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#define S_GET_VALUE(s) (((s)->sy_symbol.n_value))
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/* The name of the symbol */
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#define S_GET_NAME(s) ((s)->sy_symbol.n_un.n_name)
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/* The pointer to the string table */
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#define S_GET_OFFSET(s) ((s)->sy_symbol.n_un.n_strx)
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/* The raw type of the symbol */
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#define S_GET_RAW_TYPE(s) ((s)->sy_symbol.n_type)
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/* The type of the symbol */
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#define S_GET_TYPE(s) ((s)->sy_symbol.n_type & N_TYPE)
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/* The numeric value of the segment */
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#define S_GET_SEGMENT(s) (N_TYPE_seg[S_GET_TYPE(s)])
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/* The n_other expression value */
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#define S_GET_OTHER(s) ((s)->sy_symbol.n_other)
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/* The n_desc expression value */
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#define S_GET_DESC(s) ((s)->sy_symbol.n_desc)
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/* Modifiers */
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/* Set the value of the symbol */
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#define S_SET_VALUE(s,v) ((s)->sy_symbol.n_value = (unsigned long) (v))
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/* Assume that a symbol cannot be simultaneously in more than on segment */
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/* set segment */
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#define S_SET_SEGMENT(s,seg) ((s)->sy_symbol.n_type &= ~N_TYPE,(s)->sy_symbol.n_type|=SEGMENT_TO_SYMBOL_TYPE(seg))
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/* The symbol is external */
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#define S_SET_EXTERNAL(s) ((s)->sy_symbol.n_type |= N_EXT)
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/* The symbol is not external */
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#define S_CLEAR_EXTERNAL(s) ((s)->sy_symbol.n_type &= ~N_EXT)
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/* Set the name of the symbol */
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#define S_SET_NAME(s,v) ((s)->sy_symbol.n_un.n_name = (v))
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/* Set the offset in the string table */
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#define S_SET_OFFSET(s,v) ((s)->sy_symbol.n_un.n_strx = (v))
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/* Set the n_other expression value */
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#define S_SET_OTHER(s,v) ((s)->sy_symbol.n_other = (v))
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/* Set the n_desc expression value */
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#define S_SET_DESC(s,v) ((s)->sy_symbol.n_desc = (v))
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/* File header macro and type definition */
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#define H_GET_TEXT_SIZE(h) ((h)->header.a_text)
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#define H_GET_DATA_SIZE(h) ((h)->header.a_data)
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#define H_GET_BSS_SIZE(h) ((h)->header.a_bss)
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#define H_SET_TEXT_SIZE(h,v) ((h)->header.a_text = md_section_align(SEG_TEXT, (v)))
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#define H_SET_DATA_SIZE(h,v) ((h)->header.a_data = md_section_align(SEG_DATA, (v)))
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#define H_SET_BSS_SIZE(h,v) ((h)->header.a_bss = md_section_align(SEG_BSS, (v)))
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#define H_SET_STRING_SIZE(h,v) ((h)->string_table_size = (v))
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#define H_SET_SYMBOL_TABLE_SIZE(h,v) ((h)->header.a_syms = (v) * \
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sizeof(struct nlist))
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/* line numbering stuff. */
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#define OBJ_EMIT_LINENO(a, b, c) {;}
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#define obj_symbol_new_hook(s) {;}
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#ifdef __STDC__
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struct fix;
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void tc_aout_fix_to_chars (char *where, struct fix *fixP, relax_addressT segment_address);
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#else
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void tc_aout_fix_to_chars ();
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#endif /* __STDC__ */
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/* The rest of this file contains definitions for constants used within the actual
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VMS object file. We do not use a $ in the symbols (as per usual VMS
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convention) since System V gags on it. */
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#define OBJ_S_C_HDR 0
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#define OBJ_S_C_HDR_MHD 0
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#define OBJ_S_C_HDR_LNM 1
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#define OBJ_S_C_HDR_SRC 2
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#define OBJ_S_C_HDR_TTL 3
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#define OBJ_S_C_HDR_CPR 4
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#define OBJ_S_C_HDR_MTC 5
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#define OBJ_S_C_HDR_GTX 6
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#define OBJ_S_C_GSD 1
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#define OBJ_S_C_GSD_PSC 0
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#define OBJ_S_C_GSD_SYM 1
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#define OBJ_S_C_GSD_EPM 2
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#define OBJ_S_C_GSD_PRO 3
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#define OBJ_S_C_GSD_SYMW 4
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#define OBJ_S_C_GSD_EPMW 5
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#define OBJ_S_C_GSD_PROW 6
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#define OBJ_S_C_GSD_IDC 7
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#define OBJ_S_C_GSD_ENV 8
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#define OBJ_S_C_GSD_LSY 9
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#define OBJ_S_C_GSD_LEPM 10
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#define OBJ_S_C_GSD_LPRO 11
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#define OBJ_S_C_GSD_SPSC 12
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#define OBJ_S_C_TIR 2
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#define OBJ_S_C_EOM 3
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#define OBJ_S_C_DBG 4
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#define OBJ_S_C_TBT 5
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#define OBJ_S_C_LNK 6
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#define OBJ_S_C_EOMW 7
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#define OBJ_S_C_MAXRECTYP 7
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#define OBJ_S_K_SUBTYP 1
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#define OBJ_S_C_SUBTYP 1
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#define OBJ_S_C_MAXRECSIZ 2048
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#define OBJ_S_C_STRLVL 0
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#define OBJ_S_C_SYMSIZ 31
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#define OBJ_S_C_STOREPLIM -1
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#define OBJ_S_C_PSCALILIM 9
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#define MHD_S_C_MHD 0
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#define MHD_S_C_LNM 1
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#define MHD_S_C_SRC 2
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#define MHD_S_C_TTL 3
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#define MHD_S_C_CPR 4
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#define MHD_S_C_MTC 5
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#define MHD_S_C_GTX 6
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#define MHD_S_C_MAXHDRTYP 6
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#define GSD_S_K_ENTRIES 1
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#define GSD_S_C_ENTRIES 1
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#define GSD_S_C_PSC 0
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#define GSD_S_C_SYM 1
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#define GSD_S_C_EPM 2
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#define GSD_S_C_PRO 3
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#define GSD_S_C_SYMW 4
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#define GSD_S_C_EPMW 5
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#define GSD_S_C_PROW 6
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#define GSD_S_C_IDC 7
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#define GSD_S_C_ENV 8
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#define GSD_S_C_LSY 9
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#define GSD_S_C_LEPM 10
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#define GSD_S_C_LPRO 11
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#define GSD_S_C_SPSC 12
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#define GSD_S_C_SYMV 13
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#define GSD_S_C_EPMV 14
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#define GSD_S_C_PROV 15
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#define GSD_S_C_MAXRECTYP 15
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#define GSY_S_M_WEAK 1
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#define GSY_S_M_DEF 2
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#define GSY_S_M_UNI 4
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#define GSY_S_M_REL 8
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#define GPS_S_M_PIC 1
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#define GPS_S_M_LIB 2
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#define GPS_S_M_OVR 4
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#define GPS_S_M_REL 8
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#define GPS_S_M_GBL 16
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#define GPS_S_M_SHR 32
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#define GPS_S_M_EXE 64
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#define GPS_S_M_RD 128
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#define GPS_S_M_WRT 256
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#define GPS_S_M_VEC 512
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#define GPS_S_K_NAME 9
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#define GPS_S_C_NAME 9
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#define TIR_S_C_STA_GBL 0
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#define TIR_S_C_STA_SB 1
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#define TIR_S_C_STA_SW 2
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#define TIR_S_C_STA_LW 3
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#define TIR_S_C_STA_PB 4
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#define TIR_S_C_STA_PW 5
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#define TIR_S_C_STA_PL 6
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#define TIR_S_C_STA_UB 7
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#define TIR_S_C_STA_UW 8
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#define TIR_S_C_STA_BFI 9
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#define TIR_S_C_STA_WFI 10
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#define TIR_S_C_STA_LFI 11
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#define TIR_S_C_STA_EPM 12
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#define TIR_S_C_STA_CKARG 13
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#define TIR_S_C_STA_WPB 14
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#define TIR_S_C_STA_WPW 15
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#define TIR_S_C_STA_WPL 16
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#define TIR_S_C_STA_LSY 17
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#define TIR_S_C_STA_LIT 18
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#define TIR_S_C_STA_LEPM 19
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#define TIR_S_C_MAXSTACOD 19
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#define TIR_S_C_MINSTOCOD 20
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#define TIR_S_C_STO_SB 20
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#define TIR_S_C_STO_SW 21
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#define TIR_S_C_STO_L 22
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#define TIR_S_C_STO_BD 23
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#define TIR_S_C_STO_WD 24
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#define TIR_S_C_STO_LD 25
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#define TIR_S_C_STO_LI 26
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#define TIR_S_C_STO_PIDR 27
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#define TIR_S_C_STO_PICR 28
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#define TIR_S_C_STO_RSB 29
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#define TIR_S_C_STO_RSW 30
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#define TIR_S_C_STO_RL 31
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#define TIR_S_C_STO_VPS 32
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#define TIR_S_C_STO_USB 33
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#define TIR_S_C_STO_USW 34
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#define TIR_S_C_STO_RUB 35
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#define TIR_S_C_STO_RUW 36
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#define TIR_S_C_STO_B 37
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#define TIR_S_C_STO_W 38
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#define TIR_S_C_STO_RB 39
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#define TIR_S_C_STO_RW 40
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#define TIR_S_C_STO_RIVB 41
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#define TIR_S_C_STO_PIRR 42
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#define TIR_S_C_MAXSTOCOD 42
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#define TIR_S_C_MINOPRCOD 50
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#define TIR_S_C_OPR_NOP 50
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#define TIR_S_C_OPR_ADD 51
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#define TIR_S_C_OPR_SUB 52
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#define TIR_S_C_OPR_MUL 53
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#define TIR_S_C_OPR_DIV 54
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#define TIR_S_C_OPR_AND 55
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#define TIR_S_C_OPR_IOR 56
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#define TIR_S_C_OPR_EOR 57
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#define TIR_S_C_OPR_NEG 58
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#define TIR_S_C_OPR_COM 59
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#define TIR_S_C_OPR_INSV 60
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#define TIR_S_C_OPR_ASH 61
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#define TIR_S_C_OPR_USH 62
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#define TIR_S_C_OPR_ROT 63
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#define TIR_S_C_OPR_SEL 64
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#define TIR_S_C_OPR_REDEF 65
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#define TIR_S_C_OPR_DFLIT 66
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#define TIR_S_C_MAXOPRCOD 66
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#define TIR_S_C_MINCTLCOD 80
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#define TIR_S_C_CTL_SETRB 80
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#define TIR_S_C_CTL_AUGRB 81
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#define TIR_S_C_CTL_DFLOC 82
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#define TIR_S_C_CTL_STLOC 83
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#define TIR_S_C_CTL_STKDL 84
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#define TIR_S_C_MAXCTLCOD 84
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/*
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* Debugger symbol definitions: These are done by hand, as no
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* machine-readable version seems
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* to be available.
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*/
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#define DST_S_C_C 7 /* Language == "C" */
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#define DST_S_C_VERSION 153
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#define DST_S_C_SOURCE 155 /* Source file */
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#define DST_S_C_PROLOG 162
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#define DST_S_C_BLKBEG 176 /* Beginning of block */
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#define DST_S_C_BLKEND 177 /* End of block */
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#define DST_S_C_ENTRY 181
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#define DST_S_C_PSECT 184
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#define DST_S_C_LINE_NUM 185 /* Line Number */
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#define DST_S_C_LBLORLIT 186
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#define DST_S_C_LABEL 187
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#define DST_S_C_MODBEG 188 /* Beginning of module */
|
||
#define DST_S_C_MODEND 189 /* End of module */
|
||
#define DST_S_C_RTNBEG 190 /* Beginning of routine */
|
||
#define DST_S_C_RTNEND 191 /* End of routine */
|
||
#define DST_S_C_DELTA_PC_W 1 /* Incr PC */
|
||
#define DST_S_C_INCR_LINUM 2 /* Incr Line # */
|
||
#define DST_S_C_INCR_LINUM_W 3 /* Incr Line # */
|
||
#define DST_S_C_SET_LINUM_INCR 4
|
||
#define DST_S_C_SET_LINUM_INCR_W 5
|
||
#define DST_S_C_RESET_LINUM_INCR 6
|
||
#define DST_S_C_BEG_STMT_MODE 7
|
||
#define DST_S_C_END_STMT_MODE 8
|
||
#define DST_S_C_SET_LINE_NUM 9 /* Set Line # */
|
||
#define DST_S_C_SET_PC 10
|
||
#define DST_S_C_SET_PC_W 11
|
||
#define DST_S_C_SET_PC_L 12
|
||
#define DST_S_C_SET_STMTNUM 13
|
||
#define DST_S_C_TERM 14 /* End of lines */
|
||
#define DST_S_C_TERM_W 15 /* End of lines */
|
||
#define DST_S_C_SET_ABS_PC 16 /* Set PC */
|
||
#define DST_S_C_DELTA_PC_L 17 /* Incr PC */
|
||
#define DST_S_C_INCR_LINUM_L 18 /* Incr Line # */
|
||
#define DST_S_C_SET_LINUM_B 19 /* Set Line # */
|
||
#define DST_S_C_SET_LINUM_L 20 /* Set Line # */
|
||
#define DST_S_C_TERM_L 21 /* End of lines */
|
||
/* these are used with DST_S_C_SOURCE */
|
||
#define DST_S_C_SRC_FORMFEED 16 /* ^L counts */
|
||
#define DST_S_C_SRC_DECLFILE 1 /* Declare file */
|
||
#define DST_S_C_SRC_SETFILE 2 /* Set file */
|
||
#define DST_S_C_SRC_SETREC_L 3 /* Set record */
|
||
#define DST_S_C_SRC_DEFLINES_W 10 /* # of line */
|
||
/* the following are the codes for the various data types. Anything not on
|
||
* the list is included under 'advanced_type'
|
||
*/
|
||
#define DBG_S_C_UCHAR 0x02
|
||
#define DBG_S_C_USINT 0x03
|
||
#define DBG_S_C_ULINT 0x04
|
||
#define DBG_S_C_SCHAR 0x06
|
||
#define DBG_S_C_SSINT 0x07
|
||
#define DBG_S_C_SLINT 0x08
|
||
#define DBG_S_C_REAL4 0x0a
|
||
#define DBG_S_C_REAL8 0x0b
|
||
#define DBG_S_C_FUNCTION_ADDR 0x17
|
||
#define DBG_S_C_ADVANCED_TYPE 0xa3
|
||
/* These are the codes that are used to generate the definitions of struct
|
||
* union and enum records
|
||
*/
|
||
#define DBG_S_C_ENUM_ITEM 0xa4
|
||
#define DBG_S_C_ENUM_START 0xa5
|
||
#define DBG_S_C_ENUM_END 0xa6
|
||
#define DBG_S_C_STRUCT_START 0xab
|
||
#define DBG_S_C_STRUCT_ITEM 0xff
|
||
#define DBG_S_C_STRUCT_END 0xac
|
||
/* These are the codes that are used in the suffix records to determine the
|
||
* actual data type
|
||
*/
|
||
#define DBG_S_C_BASIC 0x01
|
||
#define DBG_S_C_BASIC_ARRAY 0x02
|
||
#define DBG_S_C_STRUCT 0x03
|
||
#define DBG_S_C_POINTER 0x04
|
||
#define DBG_S_C_VOID 0x05
|
||
#define DBG_S_C_COMPLEX_ARRAY 0x07
|
||
/* These codes are used in the generation of the symbol definition records
|
||
*/
|
||
#define DBG_S_C_FUNCTION_PARAMETER 0xc9
|
||
#define DBG_S_C_LOCAL_SYM 0xd9
|
||
/* end of obj-vms.h */
|