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/* tc-ppc.h -- Header file for tc-ppc.c.
Copyright (C) 1994 Free Software Foundation, Inc.
Written by Ian Lance Taylor, Cygnus Support.
This file is part of GAS, the GNU Assembler.
GAS 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, or (at your option)
any later version.
GAS 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 GAS; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#define TC_PPC
#ifndef BFD_ASSEMBLER
#error PowerPC support requires BFD_ASSEMBLER
#endif
/* The target BFD architecture. */
#define TARGET_ARCH (ppc_arch ())
extern enum bfd_architecture ppc_arch PARAMS ((void));
/* The target BFD format. */
#ifdef OBJ_COFF
#define TARGET_FORMAT "aixcoff-rs6000"
#endif
#ifdef OBJ_ELF
#define TARGET_FORMAT "elf32-powerpc"
#endif
/* Permit temporary numeric labels. */
#define LOCAL_LABELS_FB
/* $ is used to refer to the current location. */
#define DOLLAR_DOT
/* Strings do not use backslash escapes. */
#define NO_STRING_ESCAPES
#ifdef OBJ_COFF
/* When using COFF, we determine whether or not to output a symbol
based on sy_tc.output, not on the name. */
#define LOCAL_LABEL(name) 0
#endif
#ifdef OBJ_ELF
/* When using ELF, local labels start with '.'. */
#define LOCAL_LABEL(name) (name[0] == '.' \
&& (name[1] == 'L' || name[1] == '.'))
#define FAKE_LABEL_NAME ".L0\001"
#endif
/* Set the endianness we are using. Default to big endian. */
#ifndef TARGET_BYTES_BIG_ENDIAN
#ifndef TARGET_BYTES_LITTLE_ENDIAN
#define TARGET_BYTES_BIG_ENDIAN
#endif
#endif
#ifdef TARGET_BYTES_BIG_ENDIAN
#define PPC_BIG_ENDIAN 1
#else
#define PPC_BIG_ENDIAN 0
#endif
/* We don't need to handle .word strangely. */
#define WORKING_DOT_WORD
/* We set the fx_done field appropriately in md_apply_fix. */
#define TC_HANDLES_FX_DONE
#ifdef OBJ_COFF
/* Declarations needed when generating XCOFF code. XCOFF is an
extension of COFF, used only on the RS/6000. Rather than create an
obj-xcoff, we just use obj-coff, and handle the extensions here in
tc-ppc. */
/* We need to keep some information for symbols. */
struct ppc_tc_sy
{
/* We keep a few linked lists of symbols. */
struct symbol *next;
/* Non-zero if the symbol should be output. The RS/6000 assembler
only outputs symbols that are external or are mentioned in a
.globl or .lglobl statement. */
int output;
/* The symbol class. */
int class;
/* The real name, if the symbol was renamed. */
char *real_name;
/* For a csect symbol, the subsegment we are using. This is zero
for symbols that are not csects. */
subsegT subseg;
/* For a csect or common symbol, the alignment to use. */
int align;
/* For a function symbol, a symbol whose value is the size. The
field is NULL if there is no size. */
struct symbol *size;
/* For a csect symbol, the last symbol which has been defined in
this csect, or NULL if none have been defined so far. For a .bs
symbol, the referenced csect symbol. */
struct symbol *within;
};
#define TC_SYMFIELD_TYPE struct ppc_tc_sy
/* We need an additional auxent for function symbols. */
#define OBJ_COFF_MAX_AUXENTRIES 2
/* Square and curly brackets are permitted in symbol names. */
#define LEX_BR 3
/* Canonicalize the symbol name. */
#define tc_canonicalize_symbol_name(name) ppc_canonicalize_symbol_name (name)
extern char *ppc_canonicalize_symbol_name PARAMS ((char *));
/* Get the symbol class from the name. */
#define tc_symbol_new_hook(sym) ppc_symbol_new_hook (sym)
extern void ppc_symbol_new_hook PARAMS ((struct symbol *));
/* Set the symbol class of a label based on the csect. */
#define tc_frob_label(sym) ppc_frob_label (sym)
extern void ppc_frob_label PARAMS ((struct symbol *));
/* TOC relocs requires special handling. */
#define tc_fix_adjustable(fixp) ppc_fix_adjustable (fixp)
extern int ppc_fix_adjustable PARAMS ((struct fix *));
/* We need to set the section VMA. */
#define tc_frob_section(sec) ppc_frob_section (sec)
extern void ppc_frob_section PARAMS ((asection *));
/* Finish up the symbol. */
#define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym)
extern int ppc_frob_symbol PARAMS ((struct symbol *));
/* Finish up the file. */
#define tc_frob_file() ppc_frob_file ()
extern void ppc_frob_file PARAMS ((void));
#endif /* OBJ_COFF */
#ifdef OBJ_ELF
/* The name of the global offset table generated by the compiler. Allow
this to be overridden if need be. */
#ifndef GLOBAL_OFFSET_TABLE_NAME
#define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
#endif
#endif
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