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cell-binutils  2.17cvs20070401
tc-hppa.h
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00001 /* tc-hppa.h -- Header file for the PA
00002    Copyright 1989, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002,
00003    2003, 2004, 2005, 2006 Free Software Foundation, Inc.
00004 
00005    This file is part of GAS, the GNU Assembler.
00006 
00007    GAS is free software; you can redistribute it and/or modify
00008    it under the terms of the GNU General Public License as published by
00009    the Free Software Foundation; either version 1, or (at your option)
00010    any later version.
00011 
00012    GAS is distributed in the hope that it will be useful,
00013    but WITHOUT ANY WARRANTY; without even the implied warranty of
00014    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015    GNU General Public License for more details.
00016 
00017    You should have received a copy of the GNU General Public License
00018    along with GAS; see the file COPYING.  If not, write to the Free
00019    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
00020    02110-1301, USA.  */
00021 
00022 /* HP PA-RISC support was contributed by the Center for Software Science
00023    at the University of Utah.  */
00024 
00025 /* Please refrain from exposing the world to the internals of tc-hppa.c
00026    when this file is included.  This means only declaring exported functions,
00027    (please PARAMize them!) not exporting structures and data items which
00028    are used solely within tc-hppa.c, etc.
00029 
00030    Also refrain from adding any more object file dependent code, there is
00031    already far too much object file format dependent code in this file.
00032    In theory this file should contain only exported functions, structures
00033    and data declarations common to all PA assemblers.  */
00034 
00035 #ifndef _TC_HPPA_H
00036 #define _TC_HPPA_H
00037 
00038 #ifndef TC_HPPA
00039 #define TC_HPPA      1
00040 #endif
00041 
00042 #define TARGET_BYTES_BIG_ENDIAN 1
00043 
00044 #define TARGET_ARCH bfd_arch_hppa
00045 
00046 #define WORKING_DOT_WORD
00047 
00048 #ifdef OBJ_ELF
00049 #if TARGET_ARCH_SIZE == 64
00050 #include "bfd/elf64-hppa.h"
00051 #if defined (TE_LINUX) || defined (TE_NetBSD)
00052 #define TARGET_FORMAT "elf64-hppa-linux"
00053 #else
00054 #define TARGET_FORMAT "elf64-hppa"
00055 #endif
00056 #else /* TARGET_ARCH_SIZE == 32 */
00057 #include "bfd/elf32-hppa.h"
00058 #if defined (TE_LINUX)
00059 #define TARGET_FORMAT "elf32-hppa-linux"
00060 #else
00061 #if defined (TE_NetBSD)
00062 #define TARGET_FORMAT "elf32-hppa-netbsd"
00063 #else
00064 #define TARGET_FORMAT "elf32-hppa"
00065 #endif
00066 #endif
00067 #endif
00068 #endif
00069 
00070 #ifdef OBJ_SOM
00071 #include "bfd/som.h"
00072 #define TARGET_FORMAT "som"
00073 #endif
00074 
00075 #if defined(TE_LINUX) || defined(TE_NetBSD)
00076 /* Define to compile in an extra assembler option, -c, which enables a
00077    warning (once per file) when a comment is encountered.
00078    The hppa comment char is a `;' which tends to occur in random C asm
00079    statements.  A semicolon is a line separator for most assemblers.
00080    It's hard to find these lurking semicolons.  Thus...  */
00081 #define WARN_COMMENTS 1
00082 #endif
00083 
00084 /* FIXME.  Why oh why aren't these defined somewhere globally?  */
00085 #ifndef FALSE
00086 #define FALSE   (0)
00087 #define TRUE    (!FALSE)
00088 #endif
00089 
00090 #define ASEC_NULL (asection *)0
00091 
00092 /* pa_define_label gets used outside of tc-hppa.c via tc_frob_label.  */
00093 extern void pa_define_label (symbolS *);
00094 extern void parse_cons_expression_hppa (expressionS *);
00095 extern void cons_fix_new_hppa (fragS *, int, int, expressionS *);
00096 extern int hppa_force_relocation (struct fix *);
00097 
00098 /* This gets called before writing the object file to make sure
00099    things like entry/exit and proc/procend pairs match.  */
00100 extern void pa_check_eof (void);
00101 #define tc_frob_file pa_check_eof
00102 
00103 #define tc_frob_label(sym) pa_define_label (sym)
00104 
00105 extern const char    hppa_symbol_chars[];
00106 #define tc_symbol_chars     hppa_symbol_chars
00107 
00108 #define RELOC_EXPANSION_POSSIBLE
00109 #define MAX_RELOC_EXPANSION 6
00110 
00111 /* The PA needs to parse field selectors in .byte, etc.  */
00112 
00113 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
00114   parse_cons_expression_hppa (EXP)
00115 #define TC_CONS_FIX_NEW cons_fix_new_hppa
00116 
00117 /* On the PA, an exclamation point can appear in an instruction.  It is
00118    used in FP comparison instructions and as an end of line marker.
00119    When used in an instruction it will always follow a comma.  */
00120 #define TC_EOL_IN_INSN(PTR) (*(PTR) == '!' && (PTR)[-1] == ',')
00121 
00122 int hppa_fix_adjustable (struct fix *);
00123 #define tc_fix_adjustable hppa_fix_adjustable
00124 
00125 #define EXTERN_FORCE_RELOC 1
00126 
00127 /* Because of the strange PA calling conventions, it is sometimes
00128    necessary to emit a relocation for a call even though it would
00129    normally appear safe to handle it completely within GAS.  */
00130 #define TC_FORCE_RELOCATION(FIX) hppa_force_relocation (FIX)
00131 
00132 /* Values passed to md_apply_fix don't include the symbol value.  */
00133 #define MD_APPLY_SYM_VALUE(FIX) 0
00134 
00135 #ifdef OBJ_SOM
00136 /* If a symbol is imported, but never used, then the symbol should
00137    *not* end up in the symbol table.  Likewise for absolute symbols
00138    with local scope.  */
00139 #define tc_frob_symbol(sym,punt) \
00140     if ((S_GET_SEGMENT (sym) == &bfd_und_section && ! symbol_used_p (sym)) \
00141        || (S_GET_SEGMENT (sym) == &bfd_abs_section \
00142            && ! S_IS_EXTERNAL (sym))) \
00143       punt = 1
00144 
00145 /* We need to be able to make relocations involving the difference of
00146    two symbols.  This includes the difference of two symbols when
00147    one of them is undefined (this comes up in PIC code generation).
00148 
00149    We don't define DIFF_EXPR_OK because it does the wrong thing if
00150    the add symbol is undefined and the sub symbol is a symbol in
00151    the same section as the relocation.  We also need some way to
00152    specialize some code in adjust_reloc_syms.  */
00153 #define UNDEFINED_DIFFERENCE_OK
00154 #endif
00155 
00156 #ifdef OBJ_ELF
00157 #define DIFF_EXPR_OK 1
00158 
00159 /* Handle .type psuedo.  Given a type string of `millicode', set the
00160    internal elf symbol type to STT_PARISC_MILLI, and return
00161    BSF_FUNCTION for the BFD symbol type.  */
00162 #define md_elf_symbol_type(name, sym, elf)                            \
00163   ((strcmp ((name), "millicode") == 0                                 \
00164     || strcmp ((name), "STT_PARISC_MILLI") == 0)               \
00165    ? (((elf)->internal_elf_sym.st_info = ELF_ST_INFO                  \
00166        (ELF_ST_BIND ((elf)->internal_elf_sym.st_info), STT_PARISC_MILLI)\
00167        ), BSF_FUNCTION)                                               \
00168    : -1)
00169 
00170 #define tc_frob_symbol(sym,punt) \
00171   { \
00172     if ((S_GET_SEGMENT (sym) == &bfd_und_section \
00173          && ! symbol_used_p (sym) \
00174          && ELF_ST_VISIBILITY (S_GET_OTHER (sym)) == STV_DEFAULT) \
00175        || (S_GET_SEGMENT (sym) == &bfd_abs_section \
00176            && ! S_IS_EXTERNAL (sym)) \
00177        || strcmp (S_GET_NAME (sym), "$global$") == 0 \
00178        || strcmp (S_GET_NAME (sym), "$PIC_pcrel$0") == 0 \
00179        || strcmp (S_GET_NAME (sym), "$tls_gdidx$") == 0 \
00180        || strcmp (S_GET_NAME (sym), "$tls_ldidx$") == 0 \
00181        || strcmp (S_GET_NAME (sym), "$tls_dtpoff$") == 0 \
00182        || strcmp (S_GET_NAME (sym), "$tls_ieoff$") == 0 \
00183        || strcmp (S_GET_NAME (sym), "$tls_leoff$") == 0) \
00184       punt = 1; \
00185   }
00186 
00187 #define elf_tc_final_processing    elf_hppa_final_processing
00188 void elf_hppa_final_processing (void);
00189 
00190 #define DWARF2_LINE_MIN_INSN_LENGTH 4
00191 #endif /* OBJ_ELF */
00192 
00193 #define md_operand(x)
00194 
00195 /* Allow register expressions to be treated as absolute expressions.
00196    A silly fudge required for backwards compatibility.  */
00197 #define md_optimize_expr hppa_force_reg_syms_absolute
00198 
00199 int hppa_force_reg_syms_absolute (expressionS *, operatorT, expressionS *);
00200 
00201 #define TC_FIX_TYPE PTR
00202 #define TC_INIT_FIX_DATA(FIX) ((FIX)->tc_fix_data = NULL)
00203 
00204 #ifdef OBJ_ELF
00205 #define TARGET_USE_CFIPOP 1
00206 
00207 #define tc_cfi_frame_initial_instructions hppa_cfi_frame_initial_instructions
00208 extern void hppa_cfi_frame_initial_instructions (void);
00209 
00210 #define tc_regname_to_dw2regnum hppa_regname_to_dw2regnum
00211 extern int hppa_regname_to_dw2regnum (char *regname);
00212 
00213 #define DWARF2_LINE_MIN_INSN_LENGTH 4
00214 #define DWARF2_DEFAULT_RETURN_COLUMN 2
00215 #if TARGET_ARCH_SIZE == 64
00216 #define DWARF2_CIE_DATA_ALIGNMENT -8
00217 #else
00218 #define DWARF2_CIE_DATA_ALIGNMENT -4
00219 #endif
00220 #endif
00221 
00222 #endif /* _TC_HPPA_H */