ef36c6939e
o) Add TARGET_ABI to the MIPS toolchain build process. This sets the default ABI to one of o32, n32 or n64. If it is not set, o32 is assumed as that is the current default. o) Set the default GCC cpu type to any specified TARGET_CPUTYPE. This is necessary to have a working "cc" if e.g. mips64 is specified, as binutils will refuse to link objects using different ISAs in some cases. o) Add support for n32 and n64 ABIs to binutils and GCC. o) Add additional required libgcc2 stubs for n32 and n64. o) Add support for the "mips64r2" architecture to GCC. Add the "octeon" o) When static linking, wrap default libraries in --start-group and --end-group. This is required for static linking to work on n64 with the interdependencies between libraries there. This is what other OSes that support n64 seem to do, as well. o) Fix our GCC spec to define __mips64 for 64-bit targets, not __mips64__, the former being what libgcc, etc., check and the latter seemingly being a misspelling of a hand merge from a Linux spec. o) When no TARGET_CPUTYPE is specified at build time, make GCC take the default ISA from the ABI. Our old defaults were too liberal and assumed that 64-bit ABIs should default to the MIPS64 ISA and that 32-bit ABIs should default to the MIPS32 ISA, when we are supporting or will support some systems based on earlier 32-bit and 64-bit ISAs, most notably MIPS-III. o) Merge a new opcode file (and support code) from a later version of binutils and add flags and code necessary to support Octeon-specific instructions. This should also make merging opcodes for other modern architectures easier. Reviewed by: imp
171 lines
5.3 KiB
C
171 lines
5.3 KiB
C
/* tc-mips.h -- header file for tc-mips.c.
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Copyright 1993, 1994, 1995, 1996, 1997, 2000, 2001, 2002, 2003
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Free Software Foundation, Inc.
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Contributed by the OSF and Ralph Campbell.
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Written by Keith Knowles and Ralph Campbell, working independently.
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Modified for ECOFF support by Ian Lance Taylor of Cygnus Support.
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This file is part of GAS.
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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 2, 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, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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#ifndef TC_MIPS
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#define TC_MIPS
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struct frag;
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struct expressionS;
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/* 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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#define TARGET_ARCH bfd_arch_mips
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#define WORKING_DOT_WORD 1
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#define OLD_FLOAT_READS
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#define REPEAT_CONS_EXPRESSIONS
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#define RELOC_EXPANSION_POSSIBLE
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#define MAX_RELOC_EXPANSION 3
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#define LOCAL_LABELS_FB 1
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/* Maximum symbol offset that can be encoded in a BFD_RELOC_GPREL16
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relocation. */
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#define MAX_GPREL_OFFSET (0x7FF0)
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#define md_relax_frag(segment, fragp, stretch) \
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mips_relax_frag(segment, fragp, stretch)
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extern int mips_relax_frag (asection *, struct frag *, long);
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#define md_undefined_symbol(name) (0)
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#define md_operand(x)
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extern void mips_handle_align (struct frag *);
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#define HANDLE_ALIGN(fragp) mips_handle_align (fragp)
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#define MAX_MEM_FOR_RS_ALIGN_CODE (1 + 2)
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/* We permit PC relative difference expressions when generating
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embedded PIC code. */
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#define DIFF_EXPR_OK
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/* Tell assembler that we have an itbl_mips.h header file to include. */
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#define HAVE_ITBL_CPU
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/* The endianness of the target format may change based on command
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line arguments. */
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#define TARGET_FORMAT mips_target_format()
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extern const char *mips_target_format (void);
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/* MIPS PIC level. */
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enum mips_pic_level
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{
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/* Do not generate PIC code. */
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NO_PIC,
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/* Generate PIC code as in the SVR4 MIPS ABI. */
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SVR4_PIC,
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/* Generate PIC code without using a global offset table: the data
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segment has a maximum size of 64K, all data references are off
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the $gp register, and all text references are PC relative. This
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is used on some embedded systems. */
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EMBEDDED_PIC
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};
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extern enum mips_pic_level mips_pic;
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extern int tc_get_register (int frame);
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#define md_after_parse_args() mips_after_parse_args()
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extern void mips_after_parse_args (void);
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#define tc_init_after_args() mips_init_after_args()
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extern void mips_init_after_args (void);
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#define md_parse_long_option(arg) mips_parse_long_option (arg)
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extern int mips_parse_long_option (const char *);
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#define tc_frob_label(sym) mips_define_label (sym)
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extern void mips_define_label (symbolS *);
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#define tc_frob_file_before_adjust() mips_frob_file_before_adjust ()
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extern void mips_frob_file_before_adjust (void);
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#define tc_frob_file_before_fix() mips_frob_file ()
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extern void mips_frob_file (void);
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#if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
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#define tc_frob_file_after_relocs mips_frob_file_after_relocs
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extern void mips_frob_file_after_relocs (void);
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#endif
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#define tc_fix_adjustable(fixp) mips_fix_adjustable (fixp)
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extern int mips_fix_adjustable (struct fix *);
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/* Values passed to md_apply_fix3 don't include symbol values. */
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#define MD_APPLY_SYM_VALUE(FIX) 0
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/* Global syms must not be resolved, to support ELF shared libraries.
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When generating embedded code, we don't have shared libs. */
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#define EXTERN_FORCE_RELOC \
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(OUTPUT_FLAVOR == bfd_target_elf_flavour \
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&& mips_pic != EMBEDDED_PIC)
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/* When generating embedded PIC code we must keep PC relative
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relocations. */
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#define TC_FORCE_RELOCATION(FIX) mips_force_relocation (FIX)
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extern int mips_force_relocation (struct fix *);
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#define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEG) \
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(! SEG_NORMAL (SEG) || mips_force_relocation (FIX))
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/* Register mask variables. These are set by the MIPS assembly code
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and used by ECOFF and possibly other object file formats. */
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extern unsigned long mips_gprmask;
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extern unsigned long mips_cprmask[4];
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#if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
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#define elf_tc_final_processing mips_elf_final_processing
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extern void mips_elf_final_processing (void);
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#endif
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extern void md_mips_end (void);
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#define md_end() md_mips_end()
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#define USE_GLOBAL_POINTER_OPT (OUTPUT_FLAVOR == bfd_target_ecoff_flavour \
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|| OUTPUT_FLAVOR == bfd_target_coff_flavour \
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|| OUTPUT_FLAVOR == bfd_target_elf_flavour)
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extern void mips_pop_insert (void);
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#define md_pop_insert() mips_pop_insert()
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extern void mips_emit_delays (void);
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#define md_flush_pending_output mips_emit_delays
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extern void mips_enable_auto_align (void);
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#define md_elf_section_change_hook() mips_enable_auto_align()
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extern enum dwarf2_format mips_dwarf2_format (void);
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#define DWARF2_FORMAT() mips_dwarf2_format ()
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#define DWARF2_ADDR_SIZE(bfd) mips_dwarf2_addr_size ()
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#endif /* TC_MIPS */
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