1 /* tc-ppc.h -- Header file for tc-ppc.c.
2 Copyright (C) 1994-2019 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
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)
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
24 #include "opcode/ppc.h"
28 /* Set the endianness we are using. Default to big endian. */
29 #ifndef TARGET_BYTES_BIG_ENDIAN
30 #define TARGET_BYTES_BIG_ENDIAN 1
33 /* If OBJ_COFF is defined, and TE_PE is not defined, we are assembling
34 XCOFF for AIX or PowerMac. If TE_PE is defined, we are assembling
35 COFF for Windows NT. */
43 /* The target BFD architecture. */
44 #define TARGET_ARCH (ppc_arch ())
45 #define TARGET_MACH (ppc_mach ())
46 extern enum bfd_architecture
ppc_arch (void);
47 extern unsigned long ppc_mach (void);
49 /* Whether or not the target is big endian */
50 extern int target_big_endian
;
52 /* The target BFD format. */
53 #define TARGET_FORMAT (ppc_target_format ())
54 extern const char *ppc_target_format (void);
56 /* Permit temporary numeric labels. */
57 #define LOCAL_LABELS_FB 1
59 /* $ is used to refer to the current location. */
62 /* Strings do not use backslash escapes under COFF. */
64 #define NO_STRING_ESCAPES
68 #define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */
71 #if TARGET_BYTES_BIG_ENDIAN
72 #define PPC_BIG_ENDIAN 1
74 #define PPC_BIG_ENDIAN 0
77 /* We don't need to handle .word strangely. */
78 #define WORKING_DOT_WORD
80 #define MAX_MEM_FOR_RS_ALIGN_CODE 4
81 #define HANDLE_ALIGN(FRAGP) \
82 if ((FRAGP)->fr_type == rs_align_code) \
83 ppc_handle_align (FRAGP);
85 extern void ppc_handle_align (struct frag
*);
86 extern void ppc_frag_check (struct frag
*);
89 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
92 #define md_frag_check(FRAGP) ppc_frag_check (FRAGP)
94 /* Arrange to store the value of ppc_cpu at the site of a fixup
95 for later use in md_apply_fix. */
101 extern ppc_cpu_t ppc_cpu
;
103 #define TC_FIX_TYPE struct _ppc_fix_extra
104 #define TC_INIT_FIX_DATA(FIXP) \
105 do { (FIXP)->tc_fix_data.ppc_cpu = ppc_cpu; } while (0)
109 /* Question marks are permitted in symbol names. */
112 /* Don't adjust TOC relocs. */
113 #define tc_fix_adjustable(FIX) ppc_pe_fix_adjustable (FIX)
114 extern int ppc_pe_fix_adjustable (struct fix
*);
120 /* Declarations needed when generating XCOFF code. XCOFF is an
121 extension of COFF, used only on the RS/6000. Rather than create an
122 obj-xcoff, we just use obj-coff, and handle the extensions here in
125 /* We need to keep some information for symbols. */
128 /* We keep a few linked lists of symbols. */
130 /* The real name, if the symbol was renamed. */
132 /* Non-zero if the symbol should be output. The RS/6000 assembler
133 only outputs symbols that are external or are mentioned in a
134 .globl or .lglobl statement. */
135 unsigned char output
;
136 /* The symbol class. */
138 /* For a csect or common symbol, the alignment to use. */
140 /* For a csect symbol, the subsegment we are using. This is zero
141 for symbols that are not csects. */
143 /* For a csect symbol, the last symbol which has been defined in
144 this csect, or NULL if none have been defined so far.
145 For a .bs symbol, the referenced csect symbol.
146 For a label, the enclosing csect. */
150 /* For a function symbol, a symbol whose value is the size. The
151 field is NULL if there is no size. */
153 /* For a dwarf symbol, the corresponding dwarf subsection. */
154 struct dw_subsection
*dw
;
158 #define TC_SYMFIELD_TYPE struct ppc_tc_sy
160 /* We need an additional auxent for function symbols. */
161 #define OBJ_COFF_MAX_AUXENTRIES 2
163 /* Square and curly brackets are permitted in symbol names. */
166 /* Canonicalize the symbol name. */
167 #define tc_canonicalize_symbol_name(name) ppc_canonicalize_symbol_name (name)
168 extern char *ppc_canonicalize_symbol_name (char *);
170 /* Get the symbol class from the name. */
171 #define tc_symbol_new_hook(sym) ppc_symbol_new_hook (sym)
172 extern void ppc_symbol_new_hook (symbolS
*);
174 /* Set the symbol class of a label based on the csect. */
175 #define tc_frob_label(sym) ppc_frob_label (sym)
176 extern void ppc_frob_label (symbolS
*);
178 /* TOC relocs requires special handling. */
179 #define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX)
180 extern int ppc_fix_adjustable (struct fix
*);
182 /* We need to set the section VMA. */
183 #define tc_frob_section(sec) ppc_frob_section (sec)
184 extern void ppc_frob_section (asection
*);
186 /* Finish up the symbol. */
187 #define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym)
188 extern int ppc_frob_symbol (symbolS
*);
190 /* Finish up the entire symtab. */
191 #define tc_adjust_symtab() ppc_adjust_symtab ()
192 extern void ppc_adjust_symtab (void);
194 /* We also need to copy, in particular, the class of the symbol,
195 over what obj-coff would otherwise have copied. */
196 #define OBJ_COPY_SYMBOL_ATTRIBUTES(dest,src) \
198 if (SF_GET_GET_SEGMENT (dest)) \
199 S_SET_SEGMENT (dest, S_GET_SEGMENT (src)); \
200 symbol_get_tc (dest)->u = symbol_get_tc (src)->u; \
201 symbol_get_tc (dest)->align = symbol_get_tc (src)->align; \
202 symbol_get_tc (dest)->symbol_class = symbol_get_tc (src)->symbol_class; \
203 symbol_get_tc (dest)->within = symbol_get_tc (src)->within; \
206 extern void ppc_xcoff_end (void);
207 #define md_end ppc_xcoff_end
209 #define tc_new_dot_label(sym) ppc_new_dot_label (sym)
210 extern void ppc_new_dot_label (symbolS
*);
212 #endif /* OBJ_XCOFF */
214 extern const char ppc_symbol_chars
[];
215 #define tc_symbol_chars ppc_symbol_chars
219 /* Support for SHT_ORDERED */
220 extern int ppc_section_type (char *, size_t);
221 extern int ppc_section_flags (flagword
, bfd_vma
, int);
223 #define md_elf_section_type(STR, LEN) ppc_section_type (STR, LEN)
224 #define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE)
226 #define tc_comment_chars ppc_comment_chars
227 extern const char *ppc_comment_chars
;
229 #define md_elf_section_letter ppc_elf_section_letter
230 extern bfd_vma
ppc_elf_section_letter (int, const char **);
232 /* Keep relocations relative to the GOT, or non-PC relative. */
233 #define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX)
234 extern int ppc_fix_adjustable (struct fix
*);
236 /* Values passed to md_apply_fix don't include symbol values. */
237 #define MD_APPLY_SYM_VALUE(FIX) 0
239 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
240 ppc_elf_parse_cons (EXP, NBYTES)
241 extern bfd_reloc_code_real_type
ppc_elf_parse_cons (expressionS
*,
243 #define TC_CONS_FIX_CHECK(EXP, NBYTES, FIX) \
244 ppc_elf_cons_fix_check (EXP, NBYTES, FIX)
245 extern void ppc_elf_cons_fix_check (expressionS
*, unsigned int, struct fix
*);
247 #define tc_frob_file_before_adjust ppc_frob_file_before_adjust
248 extern void ppc_frob_file_before_adjust (void);
250 #define tc_adjust_symtab() ppc_elf_adjust_symtab ()
251 extern void ppc_elf_adjust_symtab (void);
253 extern void ppc_elf_end (void);
254 #define md_end ppc_elf_end
258 #if defined (OBJ_ELF) || defined (OBJ_XCOFF)
259 #define TC_FORCE_RELOCATION(FIX) ppc_force_relocation (FIX)
260 extern int ppc_force_relocation (struct fix
*);
264 /* Don't allow the generic code to convert fixups involving the
265 subtraction of a label in the current section to pc-relative if we
266 don't have the necessary pc-relative relocation. */
267 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \
268 (!((FIX)->fx_r_type == BFD_RELOC_64 \
269 || (FIX)->fx_r_type == BFD_RELOC_32 \
270 || (FIX)->fx_r_type == BFD_RELOC_16 \
271 || (FIX)->fx_r_type == BFD_RELOC_LO16 \
272 || (FIX)->fx_r_type == BFD_RELOC_HI16 \
273 || (FIX)->fx_r_type == BFD_RELOC_HI16_S \
274 || (FIX)->fx_r_type == BFD_RELOC_PPC64_ADDR16_HIGH \
275 || (FIX)->fx_r_type == BFD_RELOC_PPC64_ADDR16_HIGHA \
276 || (FIX)->fx_r_type == BFD_RELOC_PPC64_HIGHER \
277 || (FIX)->fx_r_type == BFD_RELOC_PPC64_HIGHER_S \
278 || (FIX)->fx_r_type == BFD_RELOC_PPC64_HIGHEST \
279 || (FIX)->fx_r_type == BFD_RELOC_PPC64_HIGHEST_S \
280 || (FIX)->fx_r_type == BFD_RELOC_PPC_16DX_HA))
283 #define TC_VALIDATE_FIX_SUB(FIX, SEG) 0
285 /* call md_pcrel_from_section, not md_pcrel_from */
286 #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section(FIX, SEC)
287 extern long md_pcrel_from_section (struct fix
*, segT
);
289 #define md_parse_name(name, exp, mode, c) ppc_parse_name (name, exp)
290 extern int ppc_parse_name (const char *, struct expressionS
*);
292 #define md_optimize_expr(left, op, right) ppc_optimize_expr (left, op, right)
293 extern int ppc_optimize_expr (expressionS
*, operatorT
, expressionS
*);
295 #define md_operand(x)
297 #define md_cleanup() ppc_cleanup ()
298 extern void ppc_cleanup (void);
300 #if (defined TE_AIX5 || defined TE_AIX \
301 || defined TE_FreeBSD || defined TE_NetBSD || defined TE_LYNX)
302 /* ppc uses different register numbers between .eh_frame and .debug_frame.
303 This macro translates the .eh_frame register numbers to .debug_frame
305 #define md_reg_eh_frame_to_debug_frame(regno) \
306 ((regno) == 70 ? 64 /* cr2 */ \
307 : (regno) == 65 ? 108 /* lr */ \
308 : (regno) == 66 ? 109 /* ctr */ \
309 : (regno) >= 68 && (regno) <= 75 ? (regno) + 86 - 68 /* crN */ \
310 : (regno) == 76 ? 101 /* xer */ \
311 : (regno) >= 77 && (regno) <= 108 ? (regno) + 1124 - 77 /* vrN */ \
312 : (regno) == 109 ? 356 /* vrsave */ \
313 : (regno) == 110 ? 67 /* vscr */ \
314 : (regno) == 111 ? 99 /* spe_acc */ \
315 : (regno) == 112 ? 612 /* spefscr */ \
319 #define TARGET_USE_CFIPOP 1
321 #define tc_cfi_frame_initial_instructions ppc_cfi_frame_initial_instructions
322 extern void ppc_cfi_frame_initial_instructions (void);
324 #define tc_regname_to_dw2regnum tc_ppc_regname_to_dw2regnum
325 extern int tc_ppc_regname_to_dw2regnum (char *);
327 extern int ppc_cie_data_alignment
;
329 extern int ppc_dwarf2_line_min_insn_length
;
331 #define DWARF2_LINE_MIN_INSN_LENGTH ppc_dwarf2_line_min_insn_length
332 #define DWARF2_DEFAULT_RETURN_COLUMN 0x41
333 #define DWARF2_CIE_DATA_ALIGNMENT ppc_cie_data_alignment
334 #define EH_FRAME_ALIGNMENT 2