288 lines
9.6 KiB
C
288 lines
9.6 KiB
C
/* tc-ppc.h -- Header file for tc-ppc.c.
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Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
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Free Software Foundation, Inc.
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Written by Ian Lance Taylor, Cygnus Support.
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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 published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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#define TC_PPC
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#ifdef ANSI_PROTOTYPES
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struct fix;
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#endif
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/* Set the endianness we are using. Default to big endian. */
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#ifndef TARGET_BYTES_BIG_ENDIAN
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#define TARGET_BYTES_BIG_ENDIAN 1
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#endif
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#ifndef BFD_ASSEMBLER
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#error PowerPC support requires BFD_ASSEMBLER
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#endif
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/* If OBJ_COFF is defined, and TE_PE is not defined, we are assembling
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XCOFF for AIX or PowerMac. If TE_PE is defined, we are assembling
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COFF for Windows NT. */
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#ifdef OBJ_COFF
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#ifndef TE_PE
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#define OBJ_XCOFF
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#endif
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#endif
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/* The target BFD architecture. */
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#define TARGET_ARCH (ppc_arch ())
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#define TARGET_MACH (ppc_mach ())
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extern enum bfd_architecture ppc_arch PARAMS ((void));
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extern unsigned long ppc_mach PARAMS ((void));
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/* Whether or not the target is big endian */
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extern int target_big_endian;
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/* The target BFD format. */
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#define TARGET_FORMAT (ppc_target_format ())
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extern char *ppc_target_format PARAMS ((void));
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/* Permit temporary numeric labels. */
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#define LOCAL_LABELS_FB 1
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/* $ is used to refer to the current location. */
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#define DOLLAR_DOT
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/* Strings do not use backslash escapes under COFF. */
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#ifdef OBJ_COFF
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#define NO_STRING_ESCAPES
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#endif
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#ifdef OBJ_ELF
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#define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */
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#endif
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#if TARGET_BYTES_BIG_ENDIAN
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#define PPC_BIG_ENDIAN 1
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#else
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#define PPC_BIG_ENDIAN 0
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#endif
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/* We don't need to handle .word strangely. */
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#define WORKING_DOT_WORD
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#define MAX_MEM_FOR_RS_ALIGN_CODE 4
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#define HANDLE_ALIGN(FRAGP) \
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if ((FRAGP)->fr_type == rs_align_code) \
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{ \
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valueT count = ((FRAGP)->fr_next->fr_address \
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- ((FRAGP)->fr_address + (FRAGP)->fr_fix)); \
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if (count != 0 && (count & 3) == 0) \
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{ \
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unsigned char *dest = (FRAGP)->fr_literal + (FRAGP)->fr_fix; \
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\
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(FRAGP)->fr_var = 4; \
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if (target_big_endian) \
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{ \
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*dest++ = 0x60; \
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*dest++ = 0; \
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*dest++ = 0; \
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*dest++ = 0; \
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} \
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else \
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{ \
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*dest++ = 0; \
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*dest++ = 0; \
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*dest++ = 0; \
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*dest++ = 0x60; \
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} \
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} \
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}
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#ifdef TE_PE
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/* Question marks are permitted in symbol names. */
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#define LEX_QM 1
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/* Don't adjust TOC relocs. */
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#define tc_fix_adjustable(fixp) ppc_pe_fix_adjustable (fixp)
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extern int ppc_pe_fix_adjustable PARAMS ((struct fix *));
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#endif
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#ifdef OBJ_XCOFF
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/* Declarations needed when generating XCOFF code. XCOFF is an
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extension of COFF, used only on the RS/6000. Rather than create an
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obj-xcoff, we just use obj-coff, and handle the extensions here in
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tc-ppc. */
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/* We need to keep some information for symbols. */
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struct ppc_tc_sy
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{
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/* We keep a few linked lists of symbols. */
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symbolS *next;
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/* Non-zero if the symbol should be output. The RS/6000 assembler
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only outputs symbols that are external or are mentioned in a
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.globl or .lglobl statement. */
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int output;
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/* The symbol class. */
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int class;
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/* The real name, if the symbol was renamed. */
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char *real_name;
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/* For a csect symbol, the subsegment we are using. This is zero
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for symbols that are not csects. */
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subsegT subseg;
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/* For a csect or common symbol, the alignment to use. */
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int align;
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/* For a function symbol, a symbol whose value is the size. The
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field is NULL if there is no size. */
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symbolS *size;
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/* For a csect symbol, the last symbol which has been defined in
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this csect, or NULL if none have been defined so far. For a .bs
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symbol, the referenced csect symbol. */
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symbolS *within;
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};
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#define TC_SYMFIELD_TYPE struct ppc_tc_sy
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/* We need an additional auxent for function symbols. */
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#define OBJ_COFF_MAX_AUXENTRIES 2
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/* Square and curly brackets are permitted in symbol names. */
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#define LEX_BR 3
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/* Canonicalize the symbol name. */
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#define tc_canonicalize_symbol_name(name) ppc_canonicalize_symbol_name (name)
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extern char *ppc_canonicalize_symbol_name PARAMS ((char *));
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/* Get the symbol class from the name. */
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#define tc_symbol_new_hook(sym) ppc_symbol_new_hook (sym)
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extern void ppc_symbol_new_hook PARAMS ((symbolS *));
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/* Set the symbol class of a label based on the csect. */
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#define tc_frob_label(sym) ppc_frob_label (sym)
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extern void ppc_frob_label PARAMS ((symbolS *));
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/* TOC relocs requires special handling. */
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#define tc_fix_adjustable(fixp) ppc_fix_adjustable (fixp)
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extern int ppc_fix_adjustable PARAMS ((struct fix *));
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/* A relocation from one csect to another must be kept. */
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#define TC_FORCE_RELOCATION(FIXP) ppc_force_relocation (FIXP)
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extern int ppc_force_relocation PARAMS ((struct fix *));
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/* We need to set the section VMA. */
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#define tc_frob_section(sec) ppc_frob_section (sec)
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extern void ppc_frob_section PARAMS ((asection *));
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/* Finish up the symbol. */
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#define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym)
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extern int ppc_frob_symbol PARAMS ((symbolS *));
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/* Finish up the entire symtab. */
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#define tc_adjust_symtab() ppc_adjust_symtab ()
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extern void ppc_adjust_symtab PARAMS ((void));
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/* We also need to copy, in particular, the class of the symbol,
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over what obj-coff would otherwise have copied. */
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#define OBJ_COPY_SYMBOL_ATTRIBUTES(dest,src) \
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do { \
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if (SF_GET_GET_SEGMENT (dest)) \
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S_SET_SEGMENT (dest, S_GET_SEGMENT (src)); \
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symbol_get_tc (dest)->size = symbol_get_tc (src)->size; \
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symbol_get_tc (dest)->align = symbol_get_tc (src)->align; \
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symbol_get_tc (dest)->class = symbol_get_tc (src)->class; \
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symbol_get_tc (dest)->within = symbol_get_tc (src)->within; \
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} while (0)
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#endif /* OBJ_XCOFF */
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#ifdef OBJ_ELF
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/* Branch prediction relocations must force relocation, as must
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the vtable description relocs. */
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#define TC_FORCE_RELOCATION(FIXP) \
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((FIXP)->fx_r_type == BFD_RELOC_PPC_B16_BRTAKEN \
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|| (FIXP)->fx_r_type == BFD_RELOC_PPC_B16_BRNTAKEN \
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|| (FIXP)->fx_r_type == BFD_RELOC_PPC_BA16_BRTAKEN \
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|| (FIXP)->fx_r_type == BFD_RELOC_PPC_BA16_BRNTAKEN \
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|| (FIXP)->fx_r_type == BFD_RELOC_PPC64_TOC \
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|| (FIXP)->fx_r_type == BFD_RELOC_VTABLE_INHERIT \
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|| (FIXP)->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
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#define TC_FORCE_RELOCATION_SECTION(FIXP,SEC) \
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(TC_FORCE_RELOCATION (FIXP) \
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|| ((FIXP)->fx_addsy && !(FIXP)->fx_subsy \
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&& S_GET_SEGMENT ((FIXP)->fx_addsy) != SEC))
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/* Support for SHF_EXCLUDE and SHT_ORDERED */
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extern int ppc_section_letter PARAMS ((int, char **));
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extern int ppc_section_type PARAMS ((char *, size_t));
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extern int ppc_section_word PARAMS ((char *, size_t));
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extern int ppc_section_flags PARAMS ((int, int, int));
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#define md_elf_section_letter(LETTER, PTR_MSG) ppc_section_letter (LETTER, PTR_MSG)
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#define md_elf_section_type(STR, LEN) ppc_section_type (STR, LEN)
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#define md_elf_section_word(STR, LEN) ppc_section_word (STR, LEN)
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#define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE)
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/* Add extra PPC sections -- Note, for now, make .sbss2 and .PPC.EMB.sbss0 a
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normal section, and not a bss section so that the linker doesn't crater
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when trying to make more than 2 sections. */
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#define ELF_TC_SPECIAL_SECTIONS \
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{ ".tags", SHT_ORDERED, SHF_ALLOC }, \
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{ ".sdata", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, \
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{ ".sbss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, \
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{ ".sdata2", SHT_PROGBITS, SHF_ALLOC }, \
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{ ".sbss2", SHT_PROGBITS, SHF_ALLOC }, \
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{ ".PPC.EMB.sdata0", SHT_PROGBITS, SHF_ALLOC }, \
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{ ".PPC.EMB.sbss0", SHT_PROGBITS, SHF_ALLOC }, \
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/* Extra sections for 64-bit ELF PPC. */ \
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{ ".toc", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE}, \
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{ ".tocbss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE},
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#define tc_comment_chars ppc_comment_chars
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extern const char *ppc_comment_chars;
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/* Keep relocations relative to the GOT, or non-PC relative. */
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#define tc_fix_adjustable(fixp) ppc_fix_adjustable (fixp)
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extern int ppc_fix_adjustable PARAMS ((struct fix *));
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/* We must never ever try to resolve references to externally visible
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symbols in the assembler, because the .o file might go into a shared
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library, and some other shared library might override that symbol. */
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#define TC_RELOC_RTSYM_LOC_FIXUP(FIX) \
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((FIX)->fx_addsy == NULL \
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|| (! S_IS_EXTERNAL ((FIX)->fx_addsy) \
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&& ! S_IS_WEAK ((FIX)->fx_addsy) \
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&& S_IS_DEFINED ((FIX)->fx_addsy) \
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&& ! S_IS_COMMON ((FIX)->fx_addsy)))
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#define tc_frob_file_before_adjust ppc_frob_file_before_adjust
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extern void ppc_frob_file_before_adjust PARAMS ((void));
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#define DWARF2_LINE_MIN_INSN_LENGTH 4
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#endif /* OBJ_ELF */
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/* call md_pcrel_from_section, not md_pcrel_from */
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#define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from_section(FIXP, SEC)
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extern long md_pcrel_from_section PARAMS ((struct fix *, segT));
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#define md_parse_name(name, exp, c) ppc_parse_name (name, exp)
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extern int ppc_parse_name PARAMS ((const char *, struct expressionS *));
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#define md_operand(x)
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