Add support for 64-bit ARM architecture: AArch64

1 files changed, 231 insertions, 0 deletions

diff --git a/gas/config/tc-aarch64.h b/gas/config/tc-aarch64.h
new file mode 100644
index 0000000000..f6f3bc72a0
--- /dev/null
+++ b/gas/config/tc-aarch64.h
@@ -0,0 +1,231 @@
+/* tc-aarch64.h -- Header file for tc-aarch64.c.
+   Copyright 2009, 2010, 2011, 2012  Free Software Foundation, Inc.
+   Contributed by ARM Ltd.
+
+   This file is part of GAS.
+
+   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 of the license, 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 this program; see the file COPYING3. If not,
+   see <http://www.gnu.org/licenses/>.  */
+
+#ifndef TC_AARCH64
+#define TC_AARCH64 1
+
+#include "opcode/aarch64.h"
+
+#ifndef TARGET_BYTES_BIG_ENDIAN
+#define TARGET_BYTES_BIG_ENDIAN 0
+#endif
+
+#define WORKING_DOT_WORD
+
+#define TARGET_ARCH 	bfd_arch_aarch64
+
+#define DIFF_EXPR_OK
+
+/* Permit // comments.  */
+#define DOUBLESLASH_LINE_COMMENTS
+
+#ifdef  LITTLE_ENDIAN
+#undef  LITTLE_ENDIAN
+#endif
+
+#ifdef  BIG_ENDIAN
+#undef  BIG_ENDIAN
+#endif
+
+#define LITTLE_ENDIAN 	1234
+#define BIG_ENDIAN 	4321
+
+#define SWAP_32(n) \
+  ((((n) & 0xff) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) \
+   | (((n) >> 24) & 0xff))
+
+struct fix;
+
+struct aarch64_fix
+{
+  struct aarch64_inst *inst;
+  enum aarch64_opnd opnd;
+};
+
+#if defined OBJ_ELF
+# define AARCH64_BI_ENDIAN
+# define TARGET_FORMAT	elf64_aarch64_target_format ()
+#endif
+
+#define TC_FORCE_RELOCATION(FIX) aarch64_force_relocation (FIX)
+
+/* Currently there is no machine specific frags generated.  */
+#define md_convert_frag(b,s,f) as_fatal ("aarch64 convert_frag called\n")
+
+#define md_cleanup() aarch64_cleanup ()
+
+#define md_start_line_hook() aarch64_start_line_hook ()
+
+#define tc_frob_label(S) aarch64_frob_label (S)
+
+/* We also need to mark assembler created symbols:  */
+#define tc_frob_fake_label(S) aarch64_frob_label (S)
+
+#define TC_FIX_TYPE struct aarch64_fix
+#define TC_INIT_FIX_DATA(FIX) { (FIX)->tc_fix_data.inst = NULL;	\
+    (FIX)->tc_fix_data.opnd = AARCH64_OPND_NIL; }
+
+#define TC_SYMFIELD_TYPE 	unsigned int
+#define AARCH64_GET_FLAG(s)   	(*symbol_get_tc (s))
+
+void aarch64_copy_symbol_attributes (symbolS *, symbolS *);
+#ifndef TC_COPY_SYMBOL_ATTRIBUTES
+#define TC_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \
+  (aarch64_copy_symbol_attributes (DEST, SRC))
+#endif
+
+#define TC_START_LABEL(C,S,STR)           ((C) == ':' \
+					   || ((C) == '/' && aarch64_data_in_code ()))
+#define tc_canonicalize_symbol_name(str) aarch64_canonicalize_symbol_name (str);
+#define obj_adjust_symtab() 		 aarch64_adjust_symtab ()
+
+#define LISTING_HEADER "AARCH64 GAS "
+
+#define LOCAL_LABEL(name)  (name[0] == '.' && name[1] == 'L')
+#define LOCAL_LABELS_FB    1
+
+/* This expression evaluates to true if the relocation is for a local
+   object for which we still want to do the relocation at runtime.
+   False if we are willing to perform this relocation while building
+   the .o file.  GOTOFF does not need to be checked here because it is
+   not pcrel.  I am not sure if some of the others are ever used with
+   pcrel, but it is easier to be safe than sorry.  */
+
+#define TC_FORCE_RELOCATION_LOCAL(FIX)			\
+  (!(FIX)->fx_pcrel					\
+   || (FIX)->fx_r_type == BFD_RELOC_64			\
+   || (FIX)->fx_r_type == BFD_RELOC_32			\
+   || TC_FORCE_RELOCATION (FIX))
+
+#define TC_CONS_FIX_NEW cons_fix_new_aarch64
+
+/* Max code alignment is 32 bytes */
+#define MAX_MEM_FOR_RS_ALIGN_CODE 31
+
+/* For frags in code sections we need to record whether they contain
+   code or data.  */
+struct aarch64_frag_type
+{
+  int recorded;
+#ifdef OBJ_ELF
+  /* If there is a mapping symbol at offset 0 in this frag,
+     it will be saved in FIRST_MAP.  If there are any mapping
+     symbols in this frag, the last one will be saved in
+     LAST_MAP.  */
+  symbolS *first_map, *last_map;
+#endif
+};
+
+#define TC_FRAG_TYPE		struct aarch64_frag_type
+/* NOTE: max_chars is a local variable from frag_var / frag_variant.  */
+#define TC_FRAG_INIT(fragp)	aarch64_init_frag (fragp, max_chars)
+#define HANDLE_ALIGN(fragp)	aarch64_handle_align (fragp)
+
+#define md_do_align(N, FILL, LEN, MAX, LABEL)					\
+  if (FILL == NULL && (N) != 0 && ! need_pass_2 && subseg_text_p (now_seg))	\
+    {										\
+      aarch64_frag_align_code (N, MAX);						\
+      goto LABEL;								\
+    }
+
+#define DWARF2_LINE_MIN_INSN_LENGTH 	2
+
+/* The lr register is r30.  */
+#define DWARF2_DEFAULT_RETURN_COLUMN  30
+
+/* Registers are generally saved at negative offsets to the CFA.  */
+#define DWARF2_CIE_DATA_ALIGNMENT     (-4)
+
+#ifdef OBJ_ELF
+# define obj_frob_symbol(sym, punt)	aarch64elf_frob_symbol ((sym), & (punt))
+
+# define GLOBAL_OFFSET_TABLE_NAME	"_GLOBAL_OFFSET_TABLE_"
+# define TC_SEGMENT_INFO_TYPE 		struct aarch64_segment_info_type
+
+/* This is not really an alignment operation, but it's something we
+   need to do at the same time: whenever we are figuring out the
+   alignment for data, we should check whether a $d symbol is
+   necessary.  */
+# define md_cons_align(nbytes)		mapping_state (MAP_DATA)
+
+enum mstate
+{
+  MAP_UNDEFINED = 0, /* Must be zero, for seginfo in new sections.  */
+  MAP_DATA,
+  MAP_INSN,
+};
+
+void mapping_state (enum mstate);
+
+struct aarch64_segment_info_type
+{
+  enum mstate mapstate;
+  unsigned int marked_pr_dependency;
+};
+
+/* We want .cfi_* pseudo-ops for generating unwind info.  */
+#define TARGET_USE_CFIPOP              1
+
+/* CFI hooks.  */
+#define tc_regname_to_dw2regnum            tc_aarch64_regname_to_dw2regnum
+#define tc_cfi_frame_initial_instructions  tc_aarch64_frame_initial_instructions
+
+#else /* Not OBJ_ELF.  */
+#define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_"
+#endif
+
+#if defined OBJ_ELF || defined OBJ_COFF
+
+# define EXTERN_FORCE_RELOC 			1
+# define tc_fix_adjustable(FIX) 		1
+/* Values passed to md_apply_fix don't include the symbol value.  */
+# define MD_APPLY_SYM_VALUE(FIX) 		0
+
+#endif
+
+#define MD_PCREL_FROM_SECTION(F,S) md_pcrel_from_section(F,S)
+
+extern long md_pcrel_from_section (struct fix *, segT);
+extern void aarch64_frag_align_code (int, int);
+extern const char * elf64_aarch64_target_format (void);
+extern int aarch64_force_relocation (struct fix *);
+extern void aarch64_cleanup (void);
+extern void aarch64_start_line_hook (void);
+extern void aarch64_frob_label (symbolS *);
+extern int aarch64_data_in_code (void);
+extern char * aarch64_canonicalize_symbol_name (char *);
+extern void aarch64_adjust_symtab (void);
+extern void aarch64elf_frob_symbol (symbolS *, int *);
+extern void cons_fix_new_aarch64 (fragS *, int, int, expressionS *);
+extern void aarch64_init_frag (struct frag *, int);
+extern void aarch64_handle_align (struct frag *);
+extern int tc_aarch64_regname_to_dw2regnum (char *regname);
+extern void tc_aarch64_frame_initial_instructions (void);
+
+#ifdef TE_PE
+
+#define O_secrel O_md1
+
+#define TC_DWARF2_EMIT_OFFSET  tc_pe_dwarf2_emit_offset
+void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
+
+#endif /* TE_PE */
+
+#endif /* TC_AARCH64 */