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[binutils.git] / gas / config / tc-hppa.h
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1 /* tc-hppa.h -- Header file for the PA
2 Copyright 1989, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
5 This file is part of GAS, the GNU Assembler.
7 GAS is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
10 any later version.
12 GAS is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GAS; see the file COPYING. If not, write to the Free
19 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
20 02110-1301, USA. */
22 /* HP PA-RISC support was contributed by the Center for Software Science
23 at the University of Utah. */
25 /* Please refrain from exposing the world to the internals of tc-hppa.c
26 when this file is included. This means only declaring exported functions,
27 (please PARAMize them!) not exporting structures and data items which
28 are used solely within tc-hppa.c, etc.
30 Also refrain from adding any more object file dependent code, there is
31 already far too much object file format dependent code in this file.
32 In theory this file should contain only exported functions, structures
33 and data declarations common to all PA assemblers. */
35 #ifndef _TC_HPPA_H
36 #define _TC_HPPA_H
38 #ifndef TC_HPPA
39 #define TC_HPPA 1
40 #endif
42 #define TARGET_BYTES_BIG_ENDIAN 1
44 #define TARGET_ARCH bfd_arch_hppa
46 #define WORKING_DOT_WORD
48 #ifdef OBJ_ELF
49 #if TARGET_ARCH_SIZE == 64
50 #include "bfd/elf64-hppa.h"
51 #if defined (TE_LINUX) || defined (TE_NetBSD)
52 #define TARGET_FORMAT "elf64-hppa-linux"
53 #else
54 #define TARGET_FORMAT "elf64-hppa"
55 #endif
56 #else /* TARGET_ARCH_SIZE == 32 */
57 #include "bfd/elf32-hppa.h"
58 #if defined (TE_LINUX)
59 #define TARGET_FORMAT "elf32-hppa-linux"
60 #else
61 #if defined (TE_NetBSD)
62 #define TARGET_FORMAT "elf32-hppa-netbsd"
63 #else
64 #define TARGET_FORMAT "elf32-hppa"
65 #endif
66 #endif
67 #endif
68 #endif
70 #ifdef OBJ_SOM
71 #include "bfd/som.h"
72 #define TARGET_FORMAT "som"
73 #endif
75 #if defined(TE_LINUX) || defined(TE_NetBSD)
76 /* Define to compile in an extra assembler option, -c, which enables a
77 warning (once per file) when a comment is encountered.
78 The hppa comment char is a `;' which tends to occur in random C asm
79 statements. A semicolon is a line separator for most assemblers.
80 It's hard to find these lurking semicolons. Thus... */
81 #define WARN_COMMENTS 1
82 #endif
84 /* FIXME. Why oh why aren't these defined somewhere globally? */
85 #ifndef FALSE
86 #define FALSE (0)
87 #define TRUE (!FALSE)
88 #endif
90 #define ASEC_NULL (asection *)0
92 /* pa_define_label gets used outside of tc-hppa.c via tc_frob_label. */
93 extern void pa_define_label (symbolS *);
94 extern void parse_cons_expression_hppa (expressionS *);
95 extern void cons_fix_new_hppa (fragS *, int, int, expressionS *);
96 extern int hppa_force_relocation (struct fix *);
98 /* This gets called before writing the object file to make sure
99 things like entry/exit and proc/procend pairs match. */
100 extern void pa_check_eof (void);
101 #define tc_frob_file pa_check_eof
103 #define tc_frob_label(sym) pa_define_label (sym)
105 extern const char hppa_symbol_chars[];
106 #define tc_symbol_chars hppa_symbol_chars
108 #define RELOC_EXPANSION_POSSIBLE
109 #define MAX_RELOC_EXPANSION 6
111 /* The PA needs to parse field selectors in .byte, etc. */
113 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
114 parse_cons_expression_hppa (EXP)
115 #define TC_CONS_FIX_NEW cons_fix_new_hppa
117 /* On the PA, an exclamation point can appear in an instruction. It is
118 used in FP comparison instructions and as an end of line marker.
119 When used in an instruction it will always follow a comma. */
120 #define TC_EOL_IN_INSN(PTR) (*(PTR) == '!' && (PTR)[-1] == ',')
122 int hppa_fix_adjustable (struct fix *);
123 #define tc_fix_adjustable hppa_fix_adjustable
125 #define EXTERN_FORCE_RELOC 1
127 /* Because of the strange PA calling conventions, it is sometimes
128 necessary to emit a relocation for a call even though it would
129 normally appear safe to handle it completely within GAS. */
130 #define TC_FORCE_RELOCATION(FIX) hppa_force_relocation (FIX)
132 /* Values passed to md_apply_fix don't include the symbol value. */
133 #define MD_APPLY_SYM_VALUE(FIX) 0
135 #ifdef OBJ_SOM
136 /* If a symbol is imported, but never used, then the symbol should
137 *not* end up in the symbol table. Likewise for absolute symbols
138 with local scope. */
139 #define tc_frob_symbol(sym,punt) \
140 if ((S_GET_SEGMENT (sym) == &bfd_und_section && ! symbol_used_p (sym)) \
141 || (S_GET_SEGMENT (sym) == &bfd_abs_section \
142 && ! S_IS_EXTERNAL (sym))) \
143 punt = 1
145 /* We need to be able to make relocations involving the difference of
146 two symbols. This includes the difference of two symbols when
147 one of them is undefined (this comes up in PIC code generation).
149 We allow the difference of two symbols when the subtract symbol is
150 local to the relocation. This is implemented using R_HPPA_COMPLEX.
152 This has some limitations. Difference expressions only work between
153 symbols in the same segment/quadrant of a module since the HP dynamic
154 loader relocates the text and data segments independently. Thus, a
155 difference expression can't be used between text and data symbols,
156 or between symbols in different executable modules. */
157 #define DIFF_EXPR_OK 1
158 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) 1
159 #define UNDEFINED_DIFFERENCE_OK
160 #endif
162 #ifdef OBJ_ELF
164 /* Difference expressions for the 64-bit HP-UX target have the same
165 limitations as those for the 32-bit SOM target. */
166 #define DIFF_EXPR_OK 1
168 /* Handle .type psuedo. Given a type string of `millicode', set the
169 internal elf symbol type to STT_PARISC_MILLI, and return
170 BSF_FUNCTION for the BFD symbol type. */
171 #define md_elf_symbol_type(name, sym, elf) \
172 ((strcmp ((name), "millicode") == 0 \
173 || strcmp ((name), "STT_PARISC_MILLI") == 0) \
174 ? (((elf)->internal_elf_sym.st_info = ELF_ST_INFO \
175 (ELF_ST_BIND ((elf)->internal_elf_sym.st_info), STT_PARISC_MILLI)\
176 ), BSF_FUNCTION) \
177 : -1)
179 #define tc_frob_symbol(sym,punt) \
181 if ((S_GET_SEGMENT (sym) == &bfd_und_section \
182 && ! symbol_used_p (sym) \
183 && ELF_ST_VISIBILITY (S_GET_OTHER (sym)) == STV_DEFAULT) \
184 || strcmp (S_GET_NAME (sym), "$global$") == 0 \
185 || strcmp (S_GET_NAME (sym), "$segrel$") == 0 \
186 || strcmp (S_GET_NAME (sym), "$PIC_pcrel$0") == 0 \
187 || strcmp (S_GET_NAME (sym), "$tls_gdidx$") == 0 \
188 || strcmp (S_GET_NAME (sym), "$tls_ldidx$") == 0 \
189 || strcmp (S_GET_NAME (sym), "$tls_dtpoff$") == 0 \
190 || strcmp (S_GET_NAME (sym), "$tls_ieoff$") == 0 \
191 || strcmp (S_GET_NAME (sym), "$tls_leoff$") == 0) \
192 punt = 1; \
195 #define elf_tc_final_processing elf_hppa_final_processing
196 void elf_hppa_final_processing (void);
197 #endif /* OBJ_ELF */
199 #define md_operand(x)
201 /* Allow register expressions to be treated as absolute expressions.
202 A silly fudge required for backwards compatibility. */
203 #define md_optimize_expr hppa_force_reg_syms_absolute
205 int hppa_force_reg_syms_absolute (expressionS *, operatorT, expressionS *);
207 #define TC_FIX_TYPE void *
208 #define TC_INIT_FIX_DATA(FIX) ((FIX)->tc_fix_data = NULL)
210 #ifdef OBJ_ELF
211 #define TARGET_USE_CFIPOP 1
213 #define tc_cfi_frame_initial_instructions hppa_cfi_frame_initial_instructions
214 extern void hppa_cfi_frame_initial_instructions (void);
216 #define tc_regname_to_dw2regnum hppa_regname_to_dw2regnum
217 extern int hppa_regname_to_dw2regnum (char *regname);
219 #define DWARF2_LINE_MIN_INSN_LENGTH 4
220 #define DWARF2_DEFAULT_RETURN_COLUMN 2
221 #if TARGET_ARCH_SIZE == 64
222 #define DWARF2_CIE_DATA_ALIGNMENT 8
223 #define DWARF2_FDE_RELOC_SIZE 8
224 #else
225 #define DWARF2_CIE_DATA_ALIGNMENT 4
226 #endif
228 #if !defined (TE_LINUX) && !defined (TE_NetBSD)
229 /* Due to the way dynamic linking to personality functions is handled
230 on HP-UX, we need to have a read-write .eh_frame section. */
231 #define DWARF2_EH_FRAME_READ_ONLY 0
233 /* Because differences between text and data symbols don't work, we
234 can't use difference expressions during CFI generation. */
235 #define CFI_DIFF_EXPR_OK 0
236 #endif
238 #endif /* OBJ_ELF */
239 #endif /* _TC_HPPA_H */