home *** CD-ROM | disk | FTP | other *** search
- /* 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
- #define TC_PPC
-
- #ifndef BFD_ASSEMBLER
- #error PowerPC support requires BFD_ASSEMBLER
- #endif
-
- /* If OBJ_COFF is defined, and TE_PE is not defined, we are assembling
- XCOFF for AIX or PowerMac. If TE_PE is defined, we are assembling
- COFF for Windows NT. */
-
- #ifdef OBJ_COFF
- #ifndef TE_PE
- #define OBJ_XCOFF
- #endif
- #endif
-
- /* The target BFD architecture. */
- #define TARGET_ARCH (ppc_arch ())
- extern enum bfd_architecture ppc_arch PARAMS ((void));
-
- /* Whether or not the target is big endian */
- extern int target_big_endian;
-
- /* The target BFD format. */
- #ifdef OBJ_COFF
- #ifdef TE_PE
- #define TARGET_FORMAT (target_big_endian ? "pe-powerpc" : "pe-powerpcle")
- #else
- #define TARGET_FORMAT "aixcoff-rs6000"
- #endif
- #endif
-
- /* PowerMac has a BFD slightly different from AIX's. */
- #ifdef TE_POWERMAC
- #ifdef TARGET_FORMAT
- #undef TARGET_FORMAT
- #endif
- #define TARGET_FORMAT "xcoff-powermac"
- #endif
-
- #ifdef OBJ_ELF
- #define TARGET_FORMAT (target_big_endian ? "elf32-powerpc" : "elf32-powerpcle")
- #endif
-
- /* Permit temporary numeric labels. */
- #define LOCAL_LABELS_FB 1
-
- /* $ is used to refer to the current location. */
- #define DOLLAR_DOT
-
- /* Strings do not use backslash escapes under COFF. */
- #ifdef OBJ_COFF
- #define NO_STRING_ESCAPES
- #endif
-
- /* When using COFF, we determine whether or not to output a symbol
- based on sy_tc.output, not on the name. */
- #ifdef OBJ_XCOFF
- #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"
- #define DIFF_EXPR_OK /* .-foo gets turned into PC relative relocs */
- #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 1
- #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 TE_PE
-
- /* Question marks are permitted in symbol names. */
- #define LEX_QM 1
-
- /* Don't adjust TOC relocs. */
- #define tc_fix_adjustable(fixp) ppc_pe_fix_adjustable (fixp)
- extern int ppc_pe_fix_adjustable PARAMS ((struct fix *));
-
- #endif
-
- #ifdef OBJ_XCOFF
-
- /* 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 entire symtab. */
- #define tc_adjust_symtab() ppc_adjust_symtab ()
- extern void ppc_adjust_symtab PARAMS ((void));
-
- /* Niclas Andersson <nican@ida.liu.se> says this is needed. */
- #define SUB_SEGMENT_ALIGN(SEG) 2
-
- #endif /* OBJ_XCOFF */
-
- #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
-
- /* Branch prediction relocations must force relocation */
- #define TC_FORCE_RELOCATION_SECTION(FIXP,SEC) \
- ((FIXP)->fx_r_type == BFD_RELOC_PPC_B16_BRTAKEN \
- || (FIXP)->fx_r_type == BFD_RELOC_PPC_B16_BRNTAKEN \
- || (FIXP)->fx_r_type == BFD_RELOC_PPC_BA16_BRTAKEN \
- || (FIXP)->fx_r_type == BFD_RELOC_PPC_BA16_BRNTAKEN \
- || ((FIXP)->fx_addsy && !(FIXP)->fx_subsy && (FIXP)->fx_addsy->bsym \
- && (FIXP)->fx_addsy->bsym->section != SEC))
-
- /* Support for SHF_EXCLUDE and SHT_ORDERED */
- extern int ppc_section_letter PARAMS ((int, char **));
- extern int ppc_section_type PARAMS ((char **));
- extern int ppc_section_word PARAMS ((char **));
- extern int ppc_section_flags PARAMS ((int, int, int));
-
- #define md_elf_section_letter(LETTER, PTR_MSG) ppc_section_letter (LETTER, PTR_MSG)
- #define md_elf_section_type(PTR_STR) ppc_section_type (PTR_STR)
- #define md_elf_section_word(PTR_STR) ppc_section_word (PTR_STR)
- #define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE)
-
- /* Add extra PPC sections -- Note, for now, make .sbss2 and .PPC.EMB.sbss0 a
- normal section, and not a bss section so that the linker doesn't crater
- when trying to make more than 2 sections. */
- #define ELF_TC_SPECIAL_SECTIONS \
- { ".tags", SHT_ORDERED, SHF_ALLOC }, \
- { ".sdata", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, \
- { ".sbss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, \
- { ".sdata2", SHT_PROGBITS, SHF_ALLOC }, \
- { ".sbss2", SHT_PROGBITS, SHF_ALLOC }, \
- { ".PPC.EMB.sdata0", SHT_PROGBITS, SHF_ALLOC }, \
- { ".PPC.EMB.sbss0", SHT_PROGBITS, SHF_ALLOC },
-
- #endif /* OBJ_ELF */
-
- /* call md_apply_fix3 with segment instead of md_apply_fix */
- #define MD_APPLY_FIX3
-
- /* call md_pcrel_from_section, not md_pcrel_from */
- #define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from_section(FIXP, SEC)
-
- #define md_operand(x)
-
-