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81b42bcab1
Part 2 adds a relaxation pass, which actually implements the code compression scheme. bfd * archures.c: Add bfd_mach_ft32b. * cpu-ft32.c: Add arch_info_struct. * elf32-ft32.c: Add R_FT32_RELAX, SC0, SC1, DIFF32. (ft32_elf_relocate_section): Add clauses for R_FT32_SC0, SC1, DIFF32. (ft32_reloc_shortable, elf32_ft32_is_diff_reloc, elf32_ft32_adjust_diff_reloc_value, elf32_ft32_adjust_reloc_if_spans_insn, elf32_ft32_relax_delete_bytes, elf32_ft32_relax_is_branch_target, ft32_elf_relax_section): New function. * reloc.c: Add BFD_RELOC_FT32_RELAX, SC0, SC1, DIFF32. * bfd-in2.h: Regenerate. * libbfd.h: Regenerate. gas * config/tc-ft32.c (md_assemble): add relaxation reloc BFD_RELOC_FT32_RELAX. (md_longopts): Add "norelax" and "no-relax". (md_apply_fix): Add reloc BFD_RELOC_FT32_DIFF32. (relaxable_section, ft32_validate_fix_sub, ft32_force_relocation, ft32_allow_local_subtract): New function. * config/tc-ft32.h: remove unused MD_PCREL_FROM_SECTION. * testsuite/gas/ft32/insnsc.s: New test exercising all FT32B shortcodes. include * elf/ft32.h: Add R_FT32_RELAX, SC0, SC1, DIFF32.
69 lines
2.8 KiB
C
69 lines
2.8 KiB
C
/* tc-ft32.h -- Header file for tc-ft32.c.
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Copyright (C) 2013-2017 Free Software Foundation, Inc.
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Contributed by FTDI (support@ftdichip.com)
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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 along
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with GAS; see the file COPYING. If not, write to the Free Software
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Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
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#define TC_FT32 1
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#define TARGET_BYTES_BIG_ENDIAN 0
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#define WORKING_DOT_WORD
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/* This macro is the BFD architecture to pass to `bfd_set_arch_mach'. */
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#define TARGET_FORMAT "elf32-ft32"
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#define TARGET_ARCH bfd_arch_ft32
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#define md_undefined_symbol(NAME) 0
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/* These macros must be defined, but is will be a fatal assembler
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error if we ever hit them. */
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#define md_estimate_size_before_relax(A, B) (as_fatal (_("estimate size\n")), 0)
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#define md_convert_frag(B, S, F) (as_fatal (_("convert_frag\n")))
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/* PC relative operands are relative to the start of the opcode, and
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the operand is always one byte into the opcode. */
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#define md_pcrel_from(FIX) \
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((FIX)->fx_where + (FIX)->fx_frag->fr_address - 1)
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#define md_section_align(SEGMENT, SIZE) (SIZE)
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/* If this macro returns non-zero, it guarantees that a relocation will be emitted
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even when the value can be resolved locally. Do that if linkrelax is turned on */
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#define TC_FORCE_RELOCATION(fix) ft32_force_relocation (fix)
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#define TC_FORCE_RELOCATION_SUB_SAME(fix, seg) \
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(! SEG_NORMAL (seg) || ft32_force_relocation (fix))
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extern int ft32_force_relocation (struct fix *);
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#define TC_LINKRELAX_FIXUP(seg) \
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((seg->flags & SEC_CODE) || (seg->flags & SEC_DEBUGGING))
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/* This macro is evaluated for any fixup with a fx_subsy that
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fixup_segment cannot reduce to a number. If the macro returns
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false an error will be reported. */
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#define TC_VALIDATE_FIX_SUB(fix, seg) ft32_validate_fix_sub (fix)
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extern int ft32_validate_fix_sub (struct fix *);
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/* The difference between same-section symbols may be affected by linker
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relaxation, so do not resolve such expressions in the assembler. */
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#define md_allow_local_subtract(l,r,s) ft32_allow_local_subtract (l, r, s)
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extern bfd_boolean ft32_allow_local_subtract (expressionS *,
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expressionS *,
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segT);
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#define md_operand(x)
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