mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-20 10:42:21 +00:00
126 lines
4.5 KiB
C
126 lines
4.5 KiB
C
/* tc-frv.h -- Header file for tc-frv.c.
|
|
Copyright (C) 2002-2018 Free Software Foundation, Inc.
|
|
|
|
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_FRV
|
|
|
|
#define LISTING_HEADER "FRV GAS "
|
|
|
|
/* The target BFD architecture. */
|
|
#define TARGET_ARCH bfd_arch_frv
|
|
|
|
#define TARGET_FORMAT (frv_md_fdpic_enabled () \
|
|
? "elf32-frvfdpic" : "elf32-frv")
|
|
extern bfd_boolean frv_md_fdpic_enabled (void);
|
|
|
|
#define TARGET_BYTES_BIG_ENDIAN 1
|
|
|
|
/* Permit temporary numeric labels. */
|
|
#define LOCAL_LABELS_FB 1
|
|
|
|
#define DIFF_EXPR_OK /* .-foo gets turned into PC relative relocs */
|
|
|
|
/* We don't need to handle .word strangely. */
|
|
#define WORKING_DOT_WORD
|
|
|
|
/* Values passed to md_apply_fix don't include the symbol value. */
|
|
#define MD_APPLY_SYM_VALUE(FIX) 0
|
|
|
|
extern void frv_tomcat_workaround (void);
|
|
#define md_cleanup frv_tomcat_workaround
|
|
|
|
#define md_number_to_chars frv_md_number_to_chars
|
|
extern void frv_md_number_to_chars (char *, valueT, int);
|
|
|
|
extern long frv_relax_frag (fragS *, long);
|
|
#define md_relax_frag(segment, fragP, stretch) frv_relax_frag(fragP, stretch)
|
|
|
|
#define tc_fix_adjustable(FIX) frv_fix_adjustable (FIX)
|
|
struct fix;
|
|
extern bfd_boolean frv_fix_adjustable (struct fix *);
|
|
|
|
/* When relaxing, we need to emit various relocs we otherwise wouldn't. */
|
|
#define TC_FORCE_RELOCATION(fix) frv_force_relocation (fix)
|
|
extern int frv_force_relocation (struct fix *);
|
|
|
|
/* If we simplify subtractions that aren't SUB_SAME or SUB_ABS, we end
|
|
up with PCrel fixups, but since we don't have any PCrel relocs, we
|
|
crash. Preventing simplification gets us a good, early error. */
|
|
#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) 1
|
|
|
|
#undef GAS_CGEN_MAX_FIXUPS
|
|
#define GAS_CGEN_MAX_FIXUPS 1
|
|
|
|
void frv_frob_label (symbolS *);
|
|
#define tc_frob_label(sym) frv_frob_label(sym)
|
|
|
|
#define tc_gen_reloc gas_cgen_tc_gen_reloc
|
|
|
|
#define md_cgen_record_fixup_exp frv_cgen_record_fixup_exp
|
|
|
|
/* 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);
|
|
|
|
/* After all of the symbols have been adjusted, go over the file looking
|
|
for any relocations that pic won't support. */
|
|
#define tc_frob_file() frv_frob_file ()
|
|
extern void frv_frob_file (void);
|
|
|
|
/* We don't want 0x00 for code alignment because this generates `add.p
|
|
gr0, gr0, gr0' patterns. Although it's fine as a nop instruction,
|
|
it has the VLIW packing bit set, which means if you have a bunch of
|
|
them in a row and attempt to execute them, you'll exceed the VLIW
|
|
capacity and fail. This also gets GDB confused sometimes, because
|
|
it won't set breakpoints in instructions other than the first of a
|
|
VLIW pack, so you used to be unable to set a breakpoint in the
|
|
initial instruction of a function that followed such
|
|
alignment-introduced instructions.
|
|
|
|
We could have arranged to emit `nop' instructions (0x80880000),
|
|
maybe even VLIW-pack sequences of nop instructions as much as
|
|
possible for the selected machine type, just in case the alignment
|
|
code actually happens to run, but this is probably too much effort
|
|
for little gain. This code is not meant to be run anyway, so just
|
|
emit nops. */
|
|
#define MAX_MEM_FOR_RS_ALIGN_CODE (3 + 4)
|
|
#define HANDLE_ALIGN(FRAGP) do \
|
|
if ((FRAGP)->fr_type == rs_align_code) \
|
|
{ \
|
|
valueT count = ((FRAGP)->fr_next->fr_address \
|
|
- ((FRAGP)->fr_address + (FRAGP)->fr_fix)); \
|
|
char *dest = (FRAGP)->fr_literal + (FRAGP)->fr_fix; \
|
|
if ((count & 3) != 0) \
|
|
{ \
|
|
memset (dest, 0, (count & 3)); \
|
|
(FRAGP)->fr_fix += (count & 3); \
|
|
dest += (count & 3); \
|
|
count -= (count & 3); \
|
|
} \
|
|
if (count) \
|
|
{ \
|
|
(FRAGP)->fr_var = 4; \
|
|
*dest++ = 0x80; \
|
|
*dest++ = 0x88; \
|
|
*dest++ = 0x00; \
|
|
*dest++ = 0x00; \
|
|
} \
|
|
} \
|
|
while (0)
|