255 lines
8.2 KiB
C
255 lines
8.2 KiB
C
/* tc-ppc.h -- Header file for tc-ppc.c.
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Copyright (C) 1994, 1995, 1996, 1997 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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extern enum bfd_architecture ppc_arch 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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#ifdef OBJ_COFF
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#ifdef TE_PE
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#define TARGET_FORMAT (target_big_endian ? "pe-powerpc" : "pe-powerpcle")
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#else
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#define TARGET_FORMAT "aixcoff-rs6000"
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#endif
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#endif
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/* PowerMac has a BFD slightly different from AIX's. */
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#ifdef TE_POWERMAC
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#ifdef TARGET_FORMAT
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#undef TARGET_FORMAT
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#endif
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#define TARGET_FORMAT "xcoff-powermac"
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#endif
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#ifdef OBJ_ELF
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#define TARGET_FORMAT (target_big_endian ? "elf32-powerpc" : "elf32-powerpcle")
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#endif
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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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/* We set the fx_done field appropriately in md_apply_fix. */
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#define TC_HANDLES_FX_DONE
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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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struct symbol *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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struct symbol *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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struct symbol *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 ((struct symbol *));
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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 ((struct symbol *));
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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 ((struct symbol *));
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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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/* Niclas Andersson <nican@ida.liu.se> says this is needed. */
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#define SUB_SEGMENT_ALIGN(SEG) 2
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#endif /* OBJ_XCOFF */
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#ifdef OBJ_ELF
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/* The name of the global offset table generated by the compiler. Allow
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this to be overridden if need be. */
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#ifndef GLOBAL_OFFSET_TABLE_NAME
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#define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
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#endif
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/* Branch prediction relocations must force relocation */
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#define TC_FORCE_RELOCATION_SECTION(FIXP,SEC) \
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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_addsy && !(FIXP)->fx_subsy && (FIXP)->fx_addsy->bsym \
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&& (FIXP)->fx_addsy->bsym->section != 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 **));
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extern int ppc_section_word PARAMS ((char **));
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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(PTR_STR) ppc_section_type (PTR_STR)
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#define md_elf_section_word(PTR_STR) ppc_section_word (PTR_STR)
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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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#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. */
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#define tc_fix_adjustable(FIX) \
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((FIX)->fx_r_type != BFD_RELOC_16_GOTOFF \
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&& (FIX)->fx_r_type != BFD_RELOC_LO16_GOTOFF \
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&& (FIX)->fx_r_type != BFD_RELOC_HI16_GOTOFF \
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&& (FIX)->fx_r_type != BFD_RELOC_HI16_S_GOTOFF \
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&& (FIX)->fx_r_type != BFD_RELOC_GPREL16)
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#endif /* OBJ_ELF */
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/* call md_apply_fix3 with segment instead of md_apply_fix */
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#define MD_APPLY_FIX3
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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) 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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