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/* tc-ppc.h -- Header file for tc-ppc.c.
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Copyright (C) 1994-2022 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 3, 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, 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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#define TC_PPC
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#include "opcode/ppc.h"
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struct fix;
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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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/* If OBJ_COFF is defined we are assembling XCOFF for AIX or PowerMac. */
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#ifdef OBJ_COFF
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#define OBJ_XCOFF
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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 (void);
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extern unsigned long ppc_mach (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 const char *ppc_target_format (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 TC_STRING_ESCAPES 0
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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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ppc_handle_align (FRAGP);
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extern unsigned int ppc_nop_select (void);
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#define NOP_OPCODE ppc_nop_select ()
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extern void ppc_handle_align (struct frag *);
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extern void ppc_frag_check (struct frag *);
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#ifdef OBJ_ELF
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#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
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#endif
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#define md_frag_check(FRAGP) ppc_frag_check (FRAGP)
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/* Arrange to store the value of ppc_cpu at the site of a fixup
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for later use in md_apply_fix. */
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struct _ppc_fix_extra
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{
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ppc_cpu_t ppc_cpu;
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};
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extern ppc_cpu_t ppc_cpu;
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#define TC_FIX_TYPE struct _ppc_fix_extra
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#define TC_INIT_FIX_DATA(FIXP) \
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do { (FIXP)->tc_fix_data.ppc_cpu = ppc_cpu; } while (0)
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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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/* The real name, if the symbol was renamed. */
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char *real_name;
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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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unsigned char output;
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/* The symbol class. */
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short symbol_class;
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/* For a csect or common symbol, the alignment to use. */
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unsigned char align;
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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 symbol, the last symbol which has been defined in
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this csect, or NULL if none have been defined so far.
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For a .bs symbol, the referenced csect symbol.
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For a C_STSYM symbol, the containing block (.bs symbol).
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For a label, the enclosing csect. */
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symbolS *within;
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union
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{
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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 dwarf symbol, the corresponding dwarf subsection. */
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struct dw_subsection *dw;
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} u;
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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 4
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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 (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 (symbolS *);
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/* TOC relocs requires special handling. */
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#define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX)
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extern int ppc_fix_adjustable (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 (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 (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 (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)->u = symbol_get_tc (src)->u; \
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symbol_get_tc (dest)->align = symbol_get_tc (src)->align; \
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symbol_get_tc (dest)->symbol_class = symbol_get_tc (src)->symbol_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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extern void ppc_xcoff_end (void);
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#define md_end ppc_xcoff_end
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#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
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ppc_xcoff_parse_cons (EXP, NBYTES)
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extern bfd_reloc_code_real_type ppc_xcoff_parse_cons (expressionS *,
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unsigned int);
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/* XCOFF format allows only few predefined sections. Gather all
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information in a common structure. */
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struct ppc_xcoff_section {
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/* Main segment of the section. */
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segT segment;
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/* Next subsegment to allocate within the segment. */
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subsegT next_subsegment;
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/* Linked list of csects in the section. */
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symbolS *csects;
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};
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#endif /* OBJ_XCOFF */
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#define tc_new_dot_label(sym) ppc_new_dot_label (sym)
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extern void ppc_new_dot_label (symbolS *);
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extern const char ppc_symbol_chars[];
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#define tc_symbol_chars ppc_symbol_chars
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#ifdef OBJ_ELF
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/* Support for SHT_ORDERED */
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extern int ppc_section_type (char *, size_t);
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extern int ppc_section_flags (flagword, bfd_vma, int);
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#define md_elf_section_type(STR, LEN) ppc_section_type (STR, LEN)
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#define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE)
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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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#define md_elf_section_letter ppc_elf_section_letter
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extern bfd_vma ppc_elf_section_letter (int, const char **);
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/* Keep relocations relative to the GOT, or non-PC relative. */
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#define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX)
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extern int ppc_fix_adjustable (struct fix *);
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/* Values passed to md_apply_fix don't include symbol values. */
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#define MD_APPLY_SYM_VALUE(FIX) 0
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#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
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ppc_elf_parse_cons (EXP, NBYTES)
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extern bfd_reloc_code_real_type ppc_elf_parse_cons (expressionS *,
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unsigned int);
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#define TC_CONS_FIX_CHECK(EXP, NBYTES, FIX) \
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ppc_elf_cons_fix_check (EXP, NBYTES, FIX)
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extern void ppc_elf_cons_fix_check (expressionS *, unsigned int, struct fix *);
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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 (void);
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#define tc_adjust_symtab() ppc_elf_adjust_symtab ()
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extern void ppc_elf_adjust_symtab (void);
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extern void ppc_elf_end (void);
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#define md_end ppc_elf_end
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#endif /* OBJ_ELF */
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#if defined (OBJ_ELF) || defined (OBJ_XCOFF)
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#define TC_FORCE_RELOCATION(FIX) ppc_force_relocation (FIX)
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extern int ppc_force_relocation (struct fix *);
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#endif
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#ifdef OBJ_ELF
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/* Don't allow the generic code to convert fixups involving the
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subtraction of a label in the current section to pc-relative if we
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don't have the necessary pc-relative relocation. */
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#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \
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(!((FIX)->fx_r_type == BFD_RELOC_64 \
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|| (FIX)->fx_r_type == BFD_RELOC_32 \
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|| (FIX)->fx_r_type == BFD_RELOC_16 \
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|| (FIX)->fx_r_type == BFD_RELOC_LO16 \
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|| (FIX)->fx_r_type == BFD_RELOC_HI16 \
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|| (FIX)->fx_r_type == BFD_RELOC_HI16_S \
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|| (FIX)->fx_r_type == BFD_RELOC_PPC64_ADDR16_HIGH \
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|| (FIX)->fx_r_type == BFD_RELOC_PPC64_ADDR16_HIGHA \
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|| (FIX)->fx_r_type == BFD_RELOC_PPC64_HIGHER \
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|| (FIX)->fx_r_type == BFD_RELOC_PPC64_HIGHER_S \
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|| (FIX)->fx_r_type == BFD_RELOC_PPC64_HIGHEST \
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|| (FIX)->fx_r_type == BFD_RELOC_PPC64_HIGHEST_S \
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|| (FIX)->fx_r_type == BFD_RELOC_PPC64_ADDR16_HIGHER34 \
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|| (FIX)->fx_r_type == BFD_RELOC_PPC64_ADDR16_HIGHERA34 \
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|| (FIX)->fx_r_type == BFD_RELOC_PPC64_ADDR16_HIGHEST34 \
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|| (FIX)->fx_r_type == BFD_RELOC_PPC64_ADDR16_HIGHESTA34 \
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|| (FIX)->fx_r_type == BFD_RELOC_PPC_16DX_HA \
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|| (FIX)->fx_r_type == BFD_RELOC_PPC64_D34 \
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|| (FIX)->fx_r_type == BFD_RELOC_PPC64_D28))
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#endif /* OBJ_ELF */
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#define RELOC_EXPANSION_POSSIBLE
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#define MAX_RELOC_EXPANSION 2
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#if defined (OBJ_XCOFF)
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/* Force a relocation when the fix is negative. */
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#define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEG) \
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(GENERIC_FORCE_RELOCATION_SUB_SAME(FIX, SEG) \
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|| (((SEG)->flags & SEC_DEBUGGING) == 0 \
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&& (FIX)->fx_addsy && (FIX)->fx_subsy \
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&& (S_GET_VALUE (fixP->fx_addsy) < S_GET_VALUE (fixP->fx_subsy))))
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/* XCOFF allows undefined differences which will be encoded with
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R_NEG relocations. */
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#define UNDEFINED_DIFFERENCE_OK
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#define TC_VALIDATE_FIX_SUB(FIX, SEG) \
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(md_register_arithmetic || (SEG) != reg_section)
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#endif /* OBJ_XCOFF */
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/* Various frobbings of labels and their addresses. */
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#define md_start_line_hook() ppc_start_line_hook ()
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extern void ppc_start_line_hook (void);
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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 (symbolS *);
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/* call md_pcrel_from_section, not md_pcrel_from */
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#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section(FIX, SEC)
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#define md_parse_name(name, exp, mode, c) ppc_parse_name (name, exp)
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extern int ppc_parse_name (const char *, struct expressionS *);
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#define md_optimize_expr(left, op, right) ppc_optimize_expr (left, op, right)
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extern int ppc_optimize_expr (expressionS *, operatorT, expressionS *);
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#define md_operand(x)
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#define md_cleanup() ppc_cleanup ()
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extern void ppc_cleanup (void);
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#if (defined TE_AIX5 || defined TE_AIX \
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|| defined TE_FreeBSD || defined TE_NetBSD || defined TE_LYNX)
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/* ppc uses different register numbers between .eh_frame and .debug_frame.
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This macro translates the .eh_frame register numbers to .debug_frame
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register numbers. */
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#define md_reg_eh_frame_to_debug_frame(regno) \
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((regno) == 70 ? 64 /* cr2 */ \
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: (regno) == 65 ? 108 /* lr */ \
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: (regno) == 66 ? 109 /* ctr */ \
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: (regno) >= 68 && (regno) <= 75 ? (regno) + 86 - 68 /* crN */ \
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: (regno) == 76 ? 101 /* xer */ \
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: (regno) >= 77 && (regno) <= 108 ? (regno) + 1124 - 77 /* vrN */ \
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: (regno) == 109 ? 356 /* vrsave */ \
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: (regno) == 110 ? 67 /* vscr */ \
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: (regno) == 111 ? 99 /* spe_acc */ \
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: (regno) == 112 ? 612 /* spefscr */ \
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: (regno))
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#endif
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#define TARGET_USE_CFIPOP 1
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#define tc_cfi_frame_initial_instructions ppc_cfi_frame_initial_instructions
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extern void ppc_cfi_frame_initial_instructions (void);
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#define tc_regname_to_dw2regnum tc_ppc_regname_to_dw2regnum
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extern int tc_ppc_regname_to_dw2regnum (char *);
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extern int ppc_cie_data_alignment;
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extern int ppc_dwarf2_line_min_insn_length;
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#define DWARF2_LINE_MIN_INSN_LENGTH ppc_dwarf2_line_min_insn_length
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#define DWARF2_DEFAULT_RETURN_COLUMN 0x41
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#define DWARF2_CIE_DATA_ALIGNMENT ppc_cie_data_alignment
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#define EH_FRAME_ALIGNMENT 2
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