1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
|
/* tc-ppc.h -- Header file for tc-ppc.c.
Copyright (C) 1994-2017 Free Software Foundation, Inc.
Written by Ian Lance Taylor, Cygnus Support.
This file is part of GAS, the GNU Assembler.
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, 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 GAS; see the file COPYING. If not, write to the Free
Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
02110-1301, USA. */
#define TC_PPC
#include "opcode/ppc.h"
struct fix;
/* Set the endianness we are using. Default to big endian. */
#ifndef TARGET_BYTES_BIG_ENDIAN
#define TARGET_BYTES_BIG_ENDIAN 1
#endif
/* If OBJ_COFF is defined, and TE_PE is not defined, we are assembling
XCOFF for AIX or PowerMac. If TE_PE is defined, we are assembling
COFF for Windows NT. */
#ifdef OBJ_COFF
#ifndef TE_PE
#define OBJ_XCOFF
#endif
#endif
/* The target BFD architecture. */
#define TARGET_ARCH (ppc_arch ())
#define TARGET_MACH (ppc_mach ())
extern enum bfd_architecture ppc_arch (void);
extern unsigned long ppc_mach (void);
/* Whether or not the target is big endian */
extern int target_big_endian;
/* The target BFD format. */
#define TARGET_FORMAT (ppc_target_format ())
extern const char *ppc_target_format (void);
/* Permit temporary numeric labels. */
#define LOCAL_LABELS_FB 1
/* $ is used to refer to the current location. */
#define DOLLAR_DOT
/* Strings do not use backslash escapes under COFF. */
#ifdef OBJ_COFF
#define NO_STRING_ESCAPES
#endif
#ifdef OBJ_ELF
#define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */
#endif
#if TARGET_BYTES_BIG_ENDIAN
#define PPC_BIG_ENDIAN 1
#else
#define PPC_BIG_ENDIAN 0
#endif
/* We don't need to handle .word strangely. */
#define WORKING_DOT_WORD
#define MAX_MEM_FOR_RS_ALIGN_CODE 4
#define HANDLE_ALIGN(FRAGP) \
if ((FRAGP)->fr_type == rs_align_code) \
ppc_handle_align (FRAGP);
extern void ppc_handle_align (struct frag *);
extern void ppc_frag_check (struct frag *);
#ifdef OBJ_ELF
#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
#endif
#define md_frag_check(FRAGP) ppc_frag_check (FRAGP)
/* Arrange to store the value of ppc_cpu at the site of a fixup
for later use in md_apply_fix. */
struct _ppc_fix_extra
{
ppc_cpu_t ppc_cpu;
};
extern ppc_cpu_t ppc_cpu;
#define TC_FIX_TYPE struct _ppc_fix_extra
#define TC_INIT_FIX_DATA(FIXP) \
do { (FIXP)->tc_fix_data.ppc_cpu = ppc_cpu; } while (0)
#ifdef TE_PE
/* Question marks are permitted in symbol names. */
#define LEX_QM 1
/* Don't adjust TOC relocs. */
#define tc_fix_adjustable(FIX) ppc_pe_fix_adjustable (FIX)
extern int ppc_pe_fix_adjustable (struct fix *);
#endif
#ifdef OBJ_XCOFF
/* Declarations needed when generating XCOFF code. XCOFF is an
extension of COFF, used only on the RS/6000. Rather than create an
obj-xcoff, we just use obj-coff, and handle the extensions here in
tc-ppc. */
/* We need to keep some information for symbols. */
struct ppc_tc_sy
{
/* We keep a few linked lists of symbols. */
symbolS *next;
/* The real name, if the symbol was renamed. */
char *real_name;
/* Non-zero if the symbol should be output. The RS/6000 assembler
only outputs symbols that are external or are mentioned in a
.globl or .lglobl statement. */
unsigned char output;
/* The symbol class. */
short symbol_class;
/* For a csect or common symbol, the alignment to use. */
unsigned char align;
/* For a csect symbol, the subsegment we are using. This is zero
for symbols that are not csects. */
subsegT subseg;
/* For a csect symbol, the last symbol which has been defined in
this csect, or NULL if none have been defined so far.
For a .bs symbol, the referenced csect symbol.
For a label, the enclosing csect. */
symbolS *within;
union
{
/* For a function symbol, a symbol whose value is the size. The
field is NULL if there is no size. */
symbolS *size;
/* For a dwarf symbol, the corresponding dwarf subsection. */
struct dw_subsection *dw;
} u;
};
#define TC_SYMFIELD_TYPE struct ppc_tc_sy
/* We need an additional auxent for function symbols. */
#define OBJ_COFF_MAX_AUXENTRIES 2
/* Square and curly brackets are permitted in symbol names. */
#define LEX_BR 3
/* Canonicalize the symbol name. */
#define tc_canonicalize_symbol_name(name) ppc_canonicalize_symbol_name (name)
extern char *ppc_canonicalize_symbol_name (char *);
/* Get the symbol class from the name. */
#define tc_symbol_new_hook(sym) ppc_symbol_new_hook (sym)
extern void ppc_symbol_new_hook (symbolS *);
/* Set the symbol class of a label based on the csect. */
#define tc_frob_label(sym) ppc_frob_label (sym)
extern void ppc_frob_label (symbolS *);
/* TOC relocs requires special handling. */
#define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX)
extern int ppc_fix_adjustable (struct fix *);
/* We need to set the section VMA. */
#define tc_frob_section(sec) ppc_frob_section (sec)
extern void ppc_frob_section (asection *);
/* Finish up the symbol. */
#define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym)
extern int ppc_frob_symbol (symbolS *);
/* Finish up the entire symtab. */
#define tc_adjust_symtab() ppc_adjust_symtab ()
extern void ppc_adjust_symtab (void);
/* We also need to copy, in particular, the class of the symbol,
over what obj-coff would otherwise have copied. */
#define OBJ_COPY_SYMBOL_ATTRIBUTES(dest,src) \
do { \
if (SF_GET_GET_SEGMENT (dest)) \
S_SET_SEGMENT (dest, S_GET_SEGMENT (src)); \
symbol_get_tc (dest)->u = symbol_get_tc (src)->u; \
symbol_get_tc (dest)->align = symbol_get_tc (src)->align; \
symbol_get_tc (dest)->symbol_class = symbol_get_tc (src)->symbol_class; \
symbol_get_tc (dest)->within = symbol_get_tc (src)->within; \
} while (0)
extern void ppc_xcoff_end (void);
#define md_end ppc_xcoff_end
#define tc_new_dot_label(sym) ppc_new_dot_label (sym)
extern void ppc_new_dot_label (symbolS *);
#endif /* OBJ_XCOFF */
extern const char ppc_symbol_chars[];
#define tc_symbol_chars ppc_symbol_chars
#ifdef OBJ_ELF
/* Support for SHT_ORDERED */
extern int ppc_section_type (char *, size_t);
extern int ppc_section_flags (flagword, bfd_vma, int);
#define md_elf_section_type(STR, LEN) ppc_section_type (STR, LEN)
#define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE)
#define tc_comment_chars ppc_comment_chars
extern const char *ppc_comment_chars;
#define md_elf_section_letter ppc_elf_section_letter
extern bfd_vma ppc_elf_section_letter (int, const char **);
/* Keep relocations relative to the GOT, or non-PC relative. */
#define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX)
extern int ppc_fix_adjustable (struct fix *);
/* Values passed to md_apply_fix don't include symbol values. */
#define MD_APPLY_SYM_VALUE(FIX) 0
#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
ppc_elf_parse_cons (EXP, NBYTES)
extern bfd_reloc_code_real_type ppc_elf_parse_cons (expressionS *,
unsigned int);
#define TC_CONS_FIX_CHECK(EXP, NBYTES, FIX) \
ppc_elf_cons_fix_check (EXP, NBYTES, FIX)
extern void ppc_elf_cons_fix_check (expressionS *, unsigned int, struct fix *);
#define tc_frob_file_before_adjust ppc_frob_file_before_adjust
extern void ppc_frob_file_before_adjust (void);
#define tc_adjust_symtab() ppc_elf_adjust_symtab ()
extern void ppc_elf_adjust_symtab (void);
extern void ppc_elf_end (void);
#define md_end ppc_elf_end
#endif /* OBJ_ELF */
#if defined (OBJ_ELF) || defined (OBJ_XCOFF)
#define TC_FORCE_RELOCATION(FIX) ppc_force_relocation (FIX)
extern int ppc_force_relocation (struct fix *);
#endif
#ifdef OBJ_ELF
/* Don't allow the generic code to convert fixups involving the
subtraction of a label in the current section to pc-relative if we
don't have the necessary pc-relative relocation. */
#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \
(!((FIX)->fx_r_type == BFD_RELOC_LO16 \
|| (FIX)->fx_r_type == BFD_RELOC_HI16 \
|| (FIX)->fx_r_type == BFD_RELOC_HI16_S \
|| (FIX)->fx_r_type == BFD_RELOC_64 \
|| (FIX)->fx_r_type == BFD_RELOC_32 \
|| (FIX)->fx_r_type == BFD_RELOC_16 \
|| (FIX)->fx_r_type == BFD_RELOC_PPC_16DX_HA))
#endif
#define TC_VALIDATE_FIX_SUB(FIX, SEG) 0
/* call md_pcrel_from_section, not md_pcrel_from */
#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section(FIX, SEC)
extern long md_pcrel_from_section (struct fix *, segT);
#define md_parse_name(name, exp, mode, c) ppc_parse_name (name, exp)
extern int ppc_parse_name (const char *, struct expressionS *);
#define md_optimize_expr(left, op, right) ppc_optimize_expr (left, op, right)
extern int ppc_optimize_expr (expressionS *, operatorT, expressionS *);
#define md_operand(x)
#define md_cleanup() ppc_cleanup ()
extern void ppc_cleanup (void);
#if (defined TE_AIX5 || defined TE_AIX \
|| defined TE_FreeBSD || defined TE_NetBSD || defined TE_LYNX)
/* ppc uses different register numbers between .eh_frame and .debug_frame.
This macro translates the .eh_frame register numbers to .debug_frame
register numbers. */
#define md_reg_eh_frame_to_debug_frame(regno) \
((regno) == 70 ? 64 /* cr2 */ \
: (regno) == 65 ? 108 /* lr */ \
: (regno) == 66 ? 109 /* ctr */ \
: (regno) >= 68 && (regno) <= 75 ? (regno) + 86 - 68 /* crN */ \
: (regno) == 76 ? 101 /* xer */ \
: (regno) >= 77 && (regno) <= 108 ? (regno) + 1124 - 77 /* vrN */ \
: (regno) == 109 ? 356 /* vrsave */ \
: (regno) == 110 ? 67 /* vscr */ \
: (regno) == 111 ? 99 /* spe_acc */ \
: (regno) == 112 ? 612 /* spefscr */ \
: (regno))
#endif
#define TARGET_USE_CFIPOP 1
#define tc_cfi_frame_initial_instructions ppc_cfi_frame_initial_instructions
extern void ppc_cfi_frame_initial_instructions (void);
#define tc_regname_to_dw2regnum tc_ppc_regname_to_dw2regnum
extern int tc_ppc_regname_to_dw2regnum (char *);
extern int ppc_cie_data_alignment;
extern int ppc_dwarf2_line_min_insn_length;
#define DWARF2_LINE_MIN_INSN_LENGTH ppc_dwarf2_line_min_insn_length
#define DWARF2_DEFAULT_RETURN_COLUMN 0x41
#define DWARF2_CIE_DATA_ALIGNMENT ppc_cie_data_alignment
#define EH_FRAME_ALIGNMENT 2
|
