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cell-binutils  2.17cvs20070401
tc-ia64.h
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00001 /* tc-ia64.h -- Header file for tc-ia64.c.
00002    Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007
00003    Free Software Foundation, Inc.
00004    Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
00005 
00006    This file is part of GAS, the GNU Assembler.
00007 
00008    GAS is free software; you can redistribute it and/or modify
00009    it under the terms of the GNU General Public License as published by
00010    the Free Software Foundation; either version 2, or (at your option)
00011    any later version.
00012 
00013    GAS is distributed in the hope that it will be useful,
00014    but WITHOUT ANY WARRANTY; without even the implied warranty of
00015    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00016    GNU General Public License for more details.
00017 
00018    You should have received a copy of the GNU General Public License
00019    along with GAS; see the file COPYING.  If not, write to
00020    the Free Software Foundation, 51 Franklin Street - Fifth Floor,
00021    Boston, MA 02110-1301, USA.  */
00022 
00023 #include "opcode/ia64.h"
00024 #include "elf/ia64.h"
00025 
00026 #define TC_IA64
00027 
00028 /* Linux is little endian by default.  HPUX is big endian by default.  */
00029 #ifdef TE_HPUX
00030 #define TARGET_BYTES_BIG_ENDIAN           1
00031 #define MD_FLAGS_DEFAULT           EF_IA_64_BE
00032 #else
00033 #define TARGET_BYTES_BIG_ENDIAN           0
00034 #define MD_FLAGS_DEFAULT           EF_IA_64_ABI64
00035 #endif /* TE_HPUX */
00036 
00037 extern void (*ia64_number_to_chars) PARAMS ((char *, valueT, int));
00038 #define md_number_to_chars         (*ia64_number_to_chars)
00039 
00040 extern void ia64_elf_section_change_hook PARAMS ((void));
00041 #define md_elf_section_change_hook ia64_elf_section_change_hook
00042 
00043 /* We record the endian for this section. 0 means default, 1 means
00044    big endian and 2 means little endian.  */
00045 struct ia64_segment_info_type
00046 {
00047   unsigned int endian : 2;
00048 };
00049 
00050 #define TC_SEGMENT_INFO_TYPE              struct ia64_segment_info_type
00051 
00052 extern void ia64_adjust_symtab PARAMS ((void));
00053 #define tc_adjust_symtab()  ia64_adjust_symtab ()
00054 
00055 extern void ia64_frob_file PARAMS ((void));
00056 #define tc_frob_file()             ia64_frob_file ()
00057 
00058 /* We need to set the default object file format in ia64_init and not in
00059    md_begin.  This is because parse_args is called before md_begin, and we
00060    do not want md_begin to wipe out the flag settings set by options parsed in
00061    md_parse_args.  */
00062 
00063 #define HOST_SPECIAL_INIT ia64_init
00064 extern void ia64_init PARAMS ((int, char **));
00065 
00066 #define TARGET_FORMAT ia64_target_format()
00067 extern const char *ia64_target_format PARAMS ((void));
00068 
00069 #define TARGET_ARCH                bfd_arch_ia64
00070 #define DOUBLESLASH_LINE_COMMENTS  /* allow //-style comments */
00071 
00072 #define NEED_LITERAL_POOL          /* need gp literal pool */
00073 #define RELOC_REQUIRES_SYMBOL
00074 #define DIFF_EXPR_OK   /* foo-. gets turned into PC relative relocs */
00075 #define NEED_INDEX_OPERATOR        /* [ ] is index operator */
00076 
00077 #define QUOTES_IN_INSN                    /* allow `string "foo;bar"' */
00078 #define LEX_AT              (LEX_NAME|LEX_BEGIN_NAME) /* allow `@' inside name */
00079 #define LEX_QM              (LEX_NAME|LEX_BEGIN_NAME) /* allow `?' inside name */
00080 #define LEX_HASH     LEX_END_NAME  /* allow `#' ending a name */
00081 
00082 extern const char ia64_symbol_chars[];
00083 #define tc_symbol_chars ia64_symbol_chars
00084 
00085 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
00086 
00087 struct ia64_fix
00088   {
00089     int bigendian;                 /* byte order at fix location */
00090     enum ia64_opnd opnd;
00091   };
00092 
00093 extern void ia64_end_of_source PARAMS((void));
00094 extern void ia64_start_line PARAMS((void));
00095 extern int ia64_unrecognized_line PARAMS((int ch));
00096 extern void ia64_frob_label PARAMS((struct symbol *sym));
00097 #ifdef TE_HPUX
00098 extern int ia64_frob_symbol PARAMS((struct symbol *sym));
00099 #endif
00100 extern void ia64_flush_pending_output PARAMS((void));
00101 extern int ia64_parse_name PARAMS((char *name, expressionS *e, char *nextP));
00102 extern int ia64_optimize_expr PARAMS((expressionS *l, operatorT op,
00103                                   expressionS *r));
00104 extern void ia64_cons_align PARAMS((int));
00105 extern void ia64_flush_insns PARAMS((void));
00106 extern int ia64_fix_adjustable PARAMS((struct fix *fix));
00107 extern int ia64_force_relocation PARAMS((struct fix *));
00108 extern void ia64_cons_fix_new PARAMS ((fragS *f, int where, int nbytes,
00109                                    expressionS *exp));
00110 extern void ia64_validate_fix PARAMS ((struct fix *fix));
00111 extern char * ia64_canonicalize_symbol_name PARAMS ((char *));
00112 extern int ia64_elf_section_letter PARAMS ((int, char **));
00113 extern flagword ia64_elf_section_flags PARAMS ((flagword, int, int));
00114 extern int ia64_elf_section_type PARAMS ((const char *, size_t len));
00115 extern long ia64_pcrel_from_section PARAMS ((struct fix *fix, segT sec));
00116 extern void ia64_md_do_align PARAMS ((int, const char *, int, int));
00117 extern void ia64_handle_align PARAMS ((fragS *f));
00118 extern void ia64_after_parse_args PARAMS ((void));
00119 extern void ia64_dwarf2_emit_offset PARAMS ((symbolS *, unsigned int));
00120 extern void ia64_check_label PARAMS ((symbolS *));
00121 extern int ia64_estimate_size_before_relax (fragS *, asection *);
00122 extern void ia64_convert_frag (fragS *);
00123 
00124 #define md_end()                          ia64_end_of_source ()
00125 #define md_start_line_hook()              ia64_start_line ()
00126 #define tc_unrecognized_line(ch)   ia64_unrecognized_line (ch)
00127 #define tc_frob_label(s)           ia64_frob_label (s)
00128 #ifdef TE_HPUX
00129 #define tc_frob_symbol(s,p)        p |= ia64_frob_symbol (s)
00130 #endif /* TE_HPUX */
00131 #define md_flush_pending_output()  ia64_flush_pending_output ()
00132 #define md_parse_name(s,e,m,c)            ia64_parse_name (s, e, c)
00133 #define tc_canonicalize_symbol_name(s)    ia64_canonicalize_symbol_name (s)
00134 #define tc_canonicalize_section_name(s)   ia64_canonicalize_symbol_name (s)
00135 #define md_optimize_expr(l,o,r)           ia64_optimize_expr (l, o, r)
00136 #define md_cons_align(n)           ia64_cons_align (n)
00137 #define TC_FORCE_RELOCATION(f)            ia64_force_relocation (f)
00138 #define tc_fix_adjustable(f)              ia64_fix_adjustable (f)
00139 #define MD_APPLY_SYM_VALUE(FIX)           0
00140 #define md_convert_frag(b,s,f)            ia64_convert_frag (f)
00141 #define md_create_long_jump(p,f,t,fr,s)   as_fatal ("ia64_create_long_jump")
00142 #define md_create_short_jump(p,f,t,fr,s) \
00143                                    as_fatal ("ia64_create_short_jump")
00144 #define md_estimate_size_before_relax(f,s) \
00145                                    ia64_estimate_size_before_relax(f,s)
00146 #define md_elf_section_letter             ia64_elf_section_letter
00147 #define md_elf_section_flags              ia64_elf_section_flags
00148 #define TC_FIX_TYPE                struct ia64_fix
00149 #define TC_INIT_FIX_DATA(f)        { f->tc_fix_data.opnd = 0; }
00150 #define TC_CONS_FIX_NEW(f,o,l,e)   ia64_cons_fix_new (f, o, l, e)
00151 #define TC_VALIDATE_FIX(fix,seg,skip)     ia64_validate_fix (fix)
00152 #define MD_PCREL_FROM_SECTION(fix,sec)    ia64_pcrel_from_section (fix, sec)
00153 #define md_section_align(seg,size) (size)
00154 #define md_do_align(n,f,l,m,j)            ia64_md_do_align (n,f,l,m)
00155 #define HANDLE_ALIGN(f)                   ia64_handle_align (f)
00156 #define md_elf_section_type(str,len)      ia64_elf_section_type (str, len)
00157 #define md_after_parse_args()             ia64_after_parse_args ()
00158 #define TC_DWARF2_EMIT_OFFSET             ia64_dwarf2_emit_offset
00159 #define tc_check_label(l)          ia64_check_label (l)
00160 
00161 /* Record if an alignment frag should end with a stop bit.  */
00162 #define TC_FRAG_TYPE               int
00163 #define TC_FRAG_INIT(FRAGP)        do {(FRAGP)->tc_frag_data = 0;}while (0)
00164 
00165 /* Give an error if a frag containing code is not aligned to a 16 byte
00166    boundary.  */
00167 #define md_frag_check(FRAGP) \
00168   if ((FRAGP)->has_code                                               \
00169       && (((FRAGP)->fr_address + (FRAGP)->insn_addr) & 15) != 0)      \
00170      as_bad_where ((FRAGP)->fr_file, (FRAGP)->fr_line,                \
00171                  _("instruction address is not a multiple of 16"));
00172 
00173 #define MAX_MEM_FOR_RS_ALIGN_CODE  (15 + 16)
00174 
00175 #define WORKING_DOT_WORD    /* don't do broken word processing for now */
00176 
00177 #define DWARF2_LINE_MIN_INSN_LENGTH 1     /* so slot-multipliers can be 1 */
00178 
00179 /* This is the information required for unwind records in an ia64
00180    object file. This is required by GAS and the compiler runtime.  */
00181 
00182 /* These are the starting point masks for the various types of
00183    unwind records. To create a record of type R3 for instance, one
00184    starts by using the value UNW_R3 and or-ing in any other required values.
00185    These values are also unique (in context), so they can be used to identify
00186    the various record types as well. UNW_Bx and some UNW_Px do have the
00187    same value, but Px can only occur in a prologue context, and Bx in
00188    a body context.  */
00189 
00190 #define UNW_R1       0x00
00191 #define UNW_R2       0x40
00192 #define UNW_R3       0x60
00193 #define UNW_P1       0x80
00194 #define UNW_P2       0xA0
00195 #define UNW_P3       0xB0
00196 #define UNW_P4       0xB8
00197 #define UNW_P5       0xB9
00198 #define UNW_P6       0xC0
00199 #define UNW_P7       0xE0
00200 #define UNW_P8       0xF0
00201 #define UNW_P9       0xF1
00202 #define UNW_P10      0xFF
00203 #define UNW_X1       0xF9
00204 #define UNW_X2       0xFA
00205 #define UNW_X3       0xFB
00206 #define UNW_X4       0xFC
00207 #define UNW_B1       0x80
00208 #define UNW_B2       0xC0
00209 #define UNW_B3       0xE0
00210 #define UNW_B4       0xF0
00211 
00212 /* These are all the various types of unwind records.  */
00213 
00214 typedef enum
00215 {
00216   prologue, prologue_gr, body, mem_stack_f, mem_stack_v, psp_gr, psp_sprel,
00217   rp_when, rp_gr, rp_br, rp_psprel, rp_sprel, pfs_when, pfs_gr, pfs_psprel,
00218   pfs_sprel, preds_when, preds_gr, preds_psprel, preds_sprel,
00219   fr_mem, frgr_mem, gr_gr, gr_mem, br_mem, br_gr, spill_base, spill_mask,
00220   unat_when, unat_gr, unat_psprel, unat_sprel, lc_when, lc_gr, lc_psprel,
00221   lc_sprel, fpsr_when, fpsr_gr, fpsr_psprel, fpsr_sprel,
00222   priunat_when_gr, priunat_when_mem, priunat_gr, priunat_psprel,
00223   priunat_sprel, bsp_when, bsp_gr, bsp_psprel, bsp_sprel, bspstore_when,
00224   bspstore_gr, bspstore_psprel, bspstore_sprel, rnat_when, rnat_gr,
00225   rnat_psprel, rnat_sprel, epilogue, label_state, copy_state,
00226   spill_psprel, spill_sprel, spill_reg, spill_psprel_p, spill_sprel_p,
00227   spill_reg_p, unwabi, endp
00228 } unw_record_type;
00229 
00230 /* These structures declare the fields that can be used in each of the
00231    4 record formats, R, P, B and X.  */
00232 
00233 typedef struct unw_r_record
00234 {
00235   unsigned long rlen;
00236   unsigned short grmask;
00237   unsigned short grsave;
00238   /* masks to represent the union of save.g, save.f, save.b, and
00239      save.gf: */
00240   unsigned long imask_size;
00241   struct
00242   {
00243     unsigned char *i;
00244     unsigned int fr_mem;
00245     unsigned char gr_mem;
00246     unsigned char br_mem;
00247   } mask;
00248 } unw_r_record;
00249 
00250 typedef struct unw_p_record
00251 {
00252   struct unw_rec_list *next;
00253   unsigned long t;
00254   unsigned long size;
00255   union
00256   {
00257     unsigned long sp;
00258     unsigned long psp;
00259   } off;
00260   union
00261   {
00262     unsigned short gr;
00263     unsigned short br;
00264   } r;
00265   unsigned char grmask;
00266   unsigned char brmask;
00267   unsigned int frmask;
00268   unsigned char abi;
00269   unsigned char context;
00270 } unw_p_record;
00271 
00272 typedef struct unw_b_record
00273 {
00274   unsigned long t;
00275   unsigned long label;
00276   unsigned short ecount;
00277 } unw_b_record;
00278 
00279 typedef struct unw_x_record
00280 {
00281   unsigned long t;
00282   union
00283   {
00284     unsigned long spoff;
00285     unsigned long pspoff;
00286     unsigned int reg;
00287   } where;
00288   unsigned short reg;
00289   unsigned short qp;
00290   unsigned short ab; /* Value of the AB field..  */
00291   unsigned short xy; /* Value of the XY field..  */
00292 } unw_x_record;
00293 
00294 /* This structure is used to determine the specific record type and
00295    its fields.  */
00296 typedef struct unwind_record
00297 {
00298   unw_record_type type;
00299   union {
00300     unw_r_record r;
00301     unw_p_record p;
00302     unw_b_record b;
00303     unw_x_record x;
00304   } record;
00305 } unwind_record;
00306 
00307 /* This expression evaluates to true if the relocation is for a local
00308    object for which we still want to do the relocation at runtime.
00309    False if we are willing to perform this relocation while building
00310    the .o file.  */
00311 
00312 /* If the reloc type is BFD_RELOC_UNUSED, then this is for a TAG13/TAG13b field
00313    which has no external reloc, so we must resolve the value now.  */
00314 
00315 #define TC_FORCE_RELOCATION_LOCAL(FIX)                  \
00316   ((FIX)->fx_r_type != BFD_RELOC_UNUSED                 \
00317    && (!(FIX)->fx_pcrel                                 \
00318        || (FIX)->fx_r_type == BFD_RELOC_IA64_PLTOFF22   \
00319        || TC_FORCE_RELOCATION (FIX)))