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authorRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
committerRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
commit252b5132c753830d5fd56823373aed85f2a0db63 (patch)
tree1af963bfd8d3e55167b81def4207f175eaff3a56 /gas/config/tc-ppc.h
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19990502 sourceware importbinu_ss_19990502
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diff --git a/gas/config/tc-ppc.h b/gas/config/tc-ppc.h
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+/* tc-ppc.h -- Header file for tc-ppc.c.
+ Copyright (C) 1994, 1995, 1996, 1997, 1998 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
+
+#ifdef ANSI_PROTOTYPES
+struct fix;
+#endif
+
+/* Set the endianness we are using. Default to big endian. */
+#ifndef TARGET_BYTES_BIG_ENDIAN
+#define TARGET_BYTES_BIG_ENDIAN 1
+#endif
+
+#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
+
+#ifdef OBJ_ELF
+#define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */
+#endif
+
+#if 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 *));
+
+/* A relocation from one csect to another must be kept. */
+#define TC_FORCE_RELOCATION(FIXP) ppc_force_relocation (FIXP)
+extern int ppc_force_relocation 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
+
+/* Branch prediction relocations must force relocation, as must
+ the vtable description relocs. */
+#define TC_FORCE_RELOCATION(FIXP) \
+((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_r_type == BFD_RELOC_VTABLE_INHERIT \
+ || (FIXP)->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
+
+#define TC_FORCE_RELOCATION_SECTION(FIXP,SEC) \
+(TC_FORCE_RELOCATION (FIXP) \
+ || ((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 },
+
+#define tc_comment_chars ppc_comment_chars
+extern const char *ppc_comment_chars;
+
+/* Keep relocations relative to the GOT, or non-PC relative. */
+#define tc_fix_adjustable(FIX) \
+ ((FIX)->fx_r_type != BFD_RELOC_16_GOTOFF \
+ && (FIX)->fx_r_type != BFD_RELOC_LO16_GOTOFF \
+ && (FIX)->fx_r_type != BFD_RELOC_HI16_GOTOFF \
+ && (FIX)->fx_r_type != BFD_RELOC_HI16_S_GOTOFF \
+ && (FIX)->fx_r_type != BFD_RELOC_GPREL16 \
+ && (FIX)->fx_r_type != BFD_RELOC_VTABLE_INHERIT \
+ && (FIX)->fx_r_type != BFD_RELOC_VTABLE_ENTRY \
+ && ! S_IS_EXTERNAL ((FIX)->fx_addsy) \
+ && ! S_IS_WEAK ((FIX)->fx_addsy) \
+ && ((FIX)->fx_pcrel \
+ || ((FIX)->fx_subsy != NULL \
+ && (S_GET_SEGMENT ((FIX)->fx_subsy) \
+ == S_GET_SEGMENT ((FIX)->fx_addsy))) \
+ || strchr (S_GET_NAME ((FIX)->fx_addsy), '\001') != NULL \
+ || strchr (S_GET_NAME ((FIX)->fx_addsy), '\002') != NULL))
+
+/* We must never ever try to resolve references to externally visible
+ symbols in the assembler, because the .o file might go into a shared
+ library, and some other shared library might override that symbol. */
+#define TC_RELOC_RTSYM_LOC_FIXUP(FIX) \
+ ((FIX)->fx_addsy == NULL \
+ || (! S_IS_EXTERNAL ((FIX)->fx_addsy) \
+ && ! S_IS_WEAK ((FIX)->fx_addsy) \
+ && S_IS_DEFINED ((FIX)->fx_addsy) \
+ && ! S_IS_COMMON ((FIX)->fx_addsy)))
+
+#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)
+extern long md_pcrel_from_section PARAMS ((struct fix *, segT));
+
+#define md_parse_name(name, exp) ppc_parse_name (name, exp)
+extern int ppc_parse_name PARAMS ((const char *, struct expressionS *));
+
+#define md_operand(x)
+