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201 lines
6.0 KiB
C
201 lines
6.0 KiB
C
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/* tc-xtensa.h -- Header file for tc-xtensa.c.
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Copyright (C) 2003 Free Software Foundation, Inc.
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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 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_XTENSA
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#define TC_XTENSA 1
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#ifdef ANSI_PROTOTYPES
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struct fix;
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#endif
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#ifndef BFD_ASSEMBLER
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#error Xtensa support requires BFD_ASSEMBLER
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#endif
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#ifndef OBJ_ELF
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#error Xtensa support requires ELF object format
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#endif
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#include "xtensa-config.h"
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#define TARGET_BYTES_BIG_ENDIAN XCHAL_HAVE_BE
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struct xtensa_frag_type
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{
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unsigned is_literal:1;
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unsigned is_text:1;
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unsigned is_loop_target:1;
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unsigned is_branch_target:1;
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unsigned is_insn:1;
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/* Info about the current state of assembly, i.e., density, relax,
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generics, freeregs, longcalls. These need to be passed to the
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backend and then to the linking file. */
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unsigned is_no_density:1;
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unsigned is_relax:1;
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unsigned is_generics:1;
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unsigned is_longcalls:1;
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/* For text fragments that can generate literals at relax time, this
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variable points to the frag where the literal will be stored. For
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literal frags, this variable points to the nearest literal pool
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location frag. This literal frag will be moved to after this
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location. */
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fragS *literal_frag;
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/* The destination segment for literal frags. (Note that this is only
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valid after xtensa_move_literals. */
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segT lit_seg;
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/* For the relaxation scheme, some literal fragments can have their
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expansions modified by an instruction that relaxes. */
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unsigned text_expansion;
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unsigned literal_expansion;
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unsigned unreported_expansion;
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};
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typedef struct xtensa_block_info_struct
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{
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segT sec;
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bfd_vma offset;
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size_t size;
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struct xtensa_block_info_struct *next;
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} xtensa_block_info;
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typedef enum
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{
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xt_insn_sec,
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xt_literal_sec,
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max_xt_sec
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} xt_section_type;
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typedef struct xtensa_segment_info_struct
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{
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fragS *literal_pool_loc;
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xtensa_block_info *blocks[max_xt_sec];
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} xtensa_segment_info;
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typedef struct xtensa_symfield_type_struct
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{
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unsigned int plt : 1;
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} xtensa_symfield_type;
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/* Section renaming is only supported in Tensilica's version of GAS. */
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#define XTENSA_SECTION_RENAME 1
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#ifdef XTENSA_SECTION_RENAME
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extern const char *xtensa_section_rename
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PARAMS ((const char *));
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#else
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/* Tensilica's section renaming feature is not included here. */
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#define xtensa_section_rename(name) (name)
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#endif /* XTENSA_SECTION_RENAME */
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extern const char *xtensa_target_format
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PARAMS ((void));
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extern void xtensa_frag_init
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PARAMS ((fragS *));
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extern void xtensa_cons_fix_new
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PARAMS ((fragS *, int, int, expressionS *));
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extern void xtensa_frob_label
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PARAMS ((struct symbol *));
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extern void xtensa_end
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PARAMS ((void));
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extern void xtensa_post_relax_hook
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PARAMS ((void));
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extern void xtensa_file_arch_init
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PARAMS ((bfd *));
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extern void xtensa_flush_pending_output
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PARAMS ((void));
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extern bfd_boolean xtensa_fix_adjustable
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PARAMS ((struct fix *));
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extern void xtensa_symbol_new_hook
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PARAMS ((symbolS *));
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extern long xtensa_relax_frag
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PARAMS ((fragS *, long, int *));
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#define TARGET_FORMAT xtensa_target_format ()
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#define TARGET_ARCH bfd_arch_xtensa
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#define TC_SEGMENT_INFO_TYPE xtensa_segment_info
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#define TC_SYMFIELD_TYPE xtensa_symfield_type
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#define TC_FRAG_TYPE struct xtensa_frag_type
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#define TC_FRAG_INIT(frag) xtensa_frag_init (frag)
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#define TC_CONS_FIX_NEW xtensa_cons_fix_new
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#define tc_canonicalize_symbol_name(s) xtensa_section_rename (s)
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#define tc_init_after_args() xtensa_file_arch_init (stdoutput)
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#define tc_fix_adjustable(fix) xtensa_fix_adjustable (fix)
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#define tc_frob_label(sym) xtensa_frob_label (sym)
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#define tc_symbol_new_hook(s) xtensa_symbol_new_hook (s)
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#define md_elf_section_rename(name) xtensa_section_rename (name)
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#define md_end xtensa_end
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#define md_flush_pending_output() xtensa_flush_pending_output ()
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#define md_operand(x)
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#define TEXT_SECTION_NAME xtensa_section_rename (".text")
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#define DATA_SECTION_NAME xtensa_section_rename (".data")
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#define BSS_SECTION_NAME xtensa_section_rename (".bss")
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/* The renumber_section function must be mapped over all the sections
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after calling xtensa_post_relax_hook. That function is static in
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write.c so it cannot be called from xtensa_post_relax_hook itself. */
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#define md_post_relax_hook \
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do \
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{ \
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int i = 0; \
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xtensa_post_relax_hook (); \
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bfd_map_over_sections (stdoutput, renumber_sections, &i); \
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} \
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while (0)
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/* Because xtensa relaxation can insert a new literal into the middle of
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fragment and thus require re-running the relaxation pass on the
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section, we need an explicit flag here. We explicitly use the name
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"stretched" here to avoid changing the source code in write.c. */
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#define md_relax_frag(segment, fragP, stretch) \
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xtensa_relax_frag (fragP, stretch, &stretched)
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#define LOCAL_LABELS_FB 1
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#define WORKING_DOT_WORD 1
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#define DOUBLESLASH_LINE_COMMENTS
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#define TC_HANDLES_FX_DONE
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#define TC_FINALIZE_SYMS_BEFORE_SIZE_SEG 0
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#define MD_APPLY_SYM_VALUE(FIX) 0
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/* The default literal sections should always be marked as "code" (i.e.,
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SHF_EXECINSTR). This is particularly important for the Linux kernel
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module loader so that the literals are not placed after the text. */
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#define ELF_TC_SPECIAL_SECTIONS \
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{ ".literal", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, \
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{ ".init.literal", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, \
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{ ".fini.literal", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
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#endif /* TC_XTENSA */
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