240 lines
8.2 KiB
C
240 lines
8.2 KiB
C
/* tc-mmix.h -- Header file for tc-mmix.c.
|
|
Copyright (C) 2001-2015 Free Software Foundation, Inc.
|
|
Written by Hans-Peter Nilsson (hp@bitrange.com).
|
|
|
|
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 3, 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, 51 Franklin Street - Fifth Floor, Boston, MA
|
|
02110-1301, USA. */
|
|
|
|
#define TC_MMIX
|
|
|
|
/* See gas/doc/internals.texi for explanation of these macros. */
|
|
#define TARGET_FORMAT "elf64-mmix"
|
|
#define TARGET_ARCH bfd_arch_mmix
|
|
#define TARGET_BYTES_BIG_ENDIAN 1
|
|
|
|
extern const char mmix_comment_chars[];
|
|
#define tc_comment_chars mmix_comment_chars
|
|
|
|
extern const char mmix_symbol_chars[];
|
|
#define tc_symbol_chars mmix_symbol_chars
|
|
|
|
extern const char mmix_exp_chars[];
|
|
#define EXP_CHARS mmix_exp_chars
|
|
|
|
extern const char mmix_flt_chars[];
|
|
#define FLT_CHARS mmix_flt_chars
|
|
|
|
/* "@" is a synonym for ".". */
|
|
#define LEX_AT (LEX_BEGIN_NAME)
|
|
|
|
extern int mmix_label_without_colon_this_line (void);
|
|
#define LABELS_WITHOUT_COLONS mmix_label_without_colon_this_line ()
|
|
|
|
extern int mmix_next_semicolon_is_eoln;
|
|
#define TC_EOL_IN_INSN(p) (*(p) == ';' && ! mmix_next_semicolon_is_eoln)
|
|
|
|
/* This is one direction we can get mmixal compatibility. */
|
|
extern void mmix_handle_mmixal (void);
|
|
#define md_start_line_hook mmix_handle_mmixal
|
|
|
|
extern void mmix_md_begin (void);
|
|
#define md_begin mmix_md_begin
|
|
|
|
extern void mmix_md_end (void);
|
|
#define md_end mmix_md_end
|
|
|
|
extern int mmix_current_location \
|
|
(void (*fn) (expressionS *), expressionS *);
|
|
extern int mmix_parse_predefined_name (char *, expressionS *);
|
|
|
|
extern char *mmix_current_prefix;
|
|
|
|
/* A bit ugly, since we "know" that there's a static function
|
|
current_location that does what we want. We also strip off a leading
|
|
':' in another ugly way.
|
|
|
|
The [DVWIOUZX]_Handler symbols are provided when-used. */
|
|
|
|
extern int mmix_gnu_syntax;
|
|
#define md_parse_name(name, exp, mode, cpos) \
|
|
(! mmix_gnu_syntax \
|
|
&& (name[0] == '@' \
|
|
? (! is_part_of_name (name[1]) \
|
|
&& mmix_current_location (current_location, exp)) \
|
|
: ((name[0] == ':' || ISUPPER (name[0])) \
|
|
&& mmix_parse_predefined_name (name, exp))))
|
|
|
|
extern char *mmix_prefix_name (char *);
|
|
|
|
/* We implement when *creating* a symbol, we also need to strip a ':' or
|
|
prepend a prefix. */
|
|
#define tc_canonicalize_symbol_name(x) \
|
|
(mmix_current_prefix == NULL && (x)[0] != ':' ? (x) : mmix_prefix_name (x))
|
|
|
|
#define md_undefined_symbol(x) NULL
|
|
|
|
extern void mmix_fb_label (expressionS *);
|
|
|
|
/* Since integer_constant is local to expr.c, we have to make this a
|
|
macro. FIXME: Do it cleaner. */
|
|
#define md_operand(exp) \
|
|
do \
|
|
{ \
|
|
if (input_line_pointer[0] == '#') \
|
|
{ \
|
|
input_line_pointer++; \
|
|
integer_constant (16, (exp)); \
|
|
} \
|
|
else if (input_line_pointer[0] == '&' \
|
|
&& input_line_pointer[1] != '&') \
|
|
as_bad (_("`&' serial number operator is not supported")); \
|
|
else \
|
|
mmix_fb_label (exp); \
|
|
} \
|
|
while (0)
|
|
|
|
/* Gas dislikes the 2ADD, 8ADD etc. insns, so we have to assemble them in
|
|
the error-recovery loop. Hopefully there are no significant
|
|
differences. Also, space on a line isn't gracefully handled. */
|
|
extern int mmix_assemble_return_nonzero (char *);
|
|
#define tc_unrecognized_line(c) \
|
|
((c) == ' ' \
|
|
|| (((c) == '1' || (c) == '2' || (c) == '4' || (c) == '8') \
|
|
&& mmix_assemble_return_nonzero (input_line_pointer - 1)))
|
|
|
|
#define md_number_to_chars number_to_chars_bigendian
|
|
|
|
#define WORKING_DOT_WORD
|
|
|
|
extern const struct relax_type mmix_relax_table[];
|
|
#define TC_GENERIC_RELAX_TABLE mmix_relax_table
|
|
|
|
/* We use the relax table for everything except the GREG frags and PUSHJ. */
|
|
extern long mmix_md_relax_frag (segT, fragS *, long);
|
|
#define md_relax_frag mmix_md_relax_frag
|
|
|
|
#define tc_fix_adjustable(FIX) \
|
|
(((FIX)->fx_addsy == NULL \
|
|
|| S_GET_SEGMENT ((FIX)->fx_addsy) != reg_section) \
|
|
&& (FIX)->fx_r_type != BFD_RELOC_VTABLE_INHERIT \
|
|
&& (FIX)->fx_r_type != BFD_RELOC_VTABLE_ENTRY \
|
|
&& (FIX)->fx_r_type != BFD_RELOC_MMIX_LOCAL)
|
|
|
|
/* Adjust symbols which are registers. */
|
|
#define tc_adjust_symtab() mmix_adjust_symtab ()
|
|
extern void mmix_adjust_symtab (void);
|
|
|
|
/* Here's where we make all symbols global, when so requested.
|
|
We must avoid doing that for expression symbols or section symbols,
|
|
though. */
|
|
extern int mmix_globalize_symbols;
|
|
#define tc_frob_symbol(sym, punt) \
|
|
do \
|
|
{ \
|
|
if (S_GET_SEGMENT (sym) == reg_section) \
|
|
{ \
|
|
if (S_GET_NAME (sym)[0] != '$' \
|
|
&& S_GET_VALUE (sym) < 256) \
|
|
{ \
|
|
if (mmix_globalize_symbols) \
|
|
S_SET_EXTERNAL (sym); \
|
|
else \
|
|
symbol_mark_used_in_reloc (sym); \
|
|
} \
|
|
} \
|
|
else if (mmix_globalize_symbols \
|
|
&& ! symbol_section_p (sym) \
|
|
&& sym != section_symbol (absolute_section) \
|
|
&& ! S_IS_LOCAL (sym)) \
|
|
S_SET_EXTERNAL (sym); \
|
|
} \
|
|
while (0)
|
|
|
|
/* No shared lib support, so we don't need to ensure externally
|
|
visible symbols can be overridden. */
|
|
#define EXTERN_FORCE_RELOC 0
|
|
|
|
/* When relaxing, we need to emit various relocs we otherwise wouldn't. */
|
|
#define TC_FORCE_RELOCATION(fix) mmix_force_relocation (fix)
|
|
extern int mmix_force_relocation (struct fix *);
|
|
|
|
/* Call md_pcrel_from_section(), not md_pcrel_from(). */
|
|
#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC)
|
|
extern long md_pcrel_from_section (struct fix *, segT);
|
|
|
|
#define md_section_align(seg, size) (size)
|
|
|
|
#define LISTING_HEADER "GAS for MMIX"
|
|
|
|
/* The default of 4 means Bcc expansion looks like it's missing a line. */
|
|
#define LISTING_LHS_CONT_LINES 5
|
|
|
|
extern fragS *mmix_opcode_frag;
|
|
#define TC_FRAG_TYPE fragS *
|
|
#define TC_FRAG_INIT(frag) (frag)->tc_frag_data = mmix_opcode_frag
|
|
|
|
/* We need to associate each section symbol with a list of GREGs defined
|
|
for that section/segment and sorted on offset, between the point where
|
|
all symbols have been evaluated and all frags mapped, and when the
|
|
fixups are done and relocs are output. Similarly for each unknown
|
|
symbol. */
|
|
extern void mmix_frob_file (void);
|
|
#define tc_frob_file_before_fix() \
|
|
do \
|
|
{ \
|
|
int i = 0; \
|
|
\
|
|
/* It's likely mmix_frob_file changed (removed) sections, so make \
|
|
sure sections are correctly numbered as per renumber_sections, \
|
|
(static to write.c where this macro is called). */ \
|
|
mmix_frob_file (); \
|
|
bfd_map_over_sections (stdoutput, renumber_sections, &i); \
|
|
} \
|
|
while (0)
|
|
|
|
/* Used by mmix_frob_file. Hangs on section symbols and unknown symbols. */
|
|
struct mmix_symbol_gregs;
|
|
#define TC_SYMFIELD_TYPE struct mmix_symbol_gregs *
|
|
|
|
/* Used by relaxation, counting maximum needed PUSHJ stubs for a section. */
|
|
struct mmix_segment_info_type
|
|
{
|
|
/* We only need to keep track of the last stubbable frag because
|
|
there's no less hackish way to keep track of different relaxation
|
|
rounds. */
|
|
fragS *last_stubfrag;
|
|
bfd_size_type nstubs;
|
|
};
|
|
#define TC_SEGMENT_INFO_TYPE struct mmix_segment_info_type
|
|
|
|
extern void mmix_md_elf_section_change_hook (void);
|
|
#define md_elf_section_change_hook mmix_md_elf_section_change_hook
|
|
|
|
extern void mmix_md_do_align (int, char *, int, int);
|
|
#define md_do_align(n, fill, len, max, label) \
|
|
mmix_md_do_align (n, fill, len, max)
|
|
|
|
/* Each insn is a tetrabyte (4 bytes) long, but if there are BYTE
|
|
sequences sprinkled in, we can get unaligned DWARF2 offsets, so let's
|
|
explicitly say one byte. */
|
|
#define DWARF2_LINE_MIN_INSN_LENGTH 1
|
|
|
|
/* This target is buggy, and sets fix size too large. */
|
|
#define TC_FX_SIZE_SLACK(FIX) 6
|
|
|
|
/* MMIX has global register symbols. */
|
|
#define TC_GLOBAL_REGISTER_SYMBOL_OK
|