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2002-02-18 Franz Sirl <Franz.Sirl-kernel@lauterbach.com>
[pf3gnuchains/gcc-fork.git] / gcc / config / rs6000 / sysv4.h
1 /* Target definitions for GNU compiler for PowerPC running System V.4
2    Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001
3    Free Software Foundation, Inc.
4    Contributed by Cygnus Support.
5
6 This file is part of GNU CC.
7
8 GNU CC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
11 any later version.
12
13 GNU CC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GNU CC; see the file COPYING.  If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA.  */
22
23
24 /* Yes!  We are ELF.  */
25 #define TARGET_OBJECT_FORMAT OBJECT_ELF
26
27 /* Default ABI to compile code for.  */
28 #define DEFAULT_ABI rs6000_current_abi
29
30 /* Default ABI to use.  */
31 #define RS6000_ABI_NAME "sysv"
32
33 /* Override rs6000.h definition.  */
34 #undef  ASM_DEFAULT_SPEC
35 #define ASM_DEFAULT_SPEC "-mppc"
36
37 /* Override rs6000.h definition.  */
38 #undef  CPP_DEFAULT_SPEC
39 #define CPP_DEFAULT_SPEC "-D_ARCH_PPC"
40
41 /* Small data support types.  */
42 enum rs6000_sdata_type {
43   SDATA_NONE,                   /* No small data support.  */
44   SDATA_DATA,                   /* Just put data in .sbss/.sdata, don't use relocs.  */
45   SDATA_SYSV,                   /* Use r13 to point to .sdata/.sbss.  */
46   SDATA_EABI                    /* Use r13 like above, r2 points to .sdata2/.sbss2.  */
47 };
48
49 extern enum rs6000_sdata_type rs6000_sdata;
50
51 /* V.4/eabi switches.  */
52 #define MASK_NO_BITFIELD_TYPE   0x40000000      /* Set PCC_BITFIELD_TYPE_MATTERS to 0.  */
53 #define MASK_STRICT_ALIGN       0x20000000      /* Set STRICT_ALIGNMENT to 1.  */
54 #define MASK_RELOCATABLE        0x10000000      /* GOT pointers are PC relative.  */
55 #define MASK_EABI               0x08000000      /* Adhere to eabi, not System V spec.  */
56 #define MASK_LITTLE_ENDIAN      0x04000000      /* Target is little endian.  */
57 #define MASK_REGNAMES           0x02000000      /* Use alternate register names.  */
58 #define MASK_PROTOTYPE          0x01000000      /* Only prototyped fcns pass variable args.  */
59 #define MASK_NO_BITFIELD_WORD   0x00800000      /* Bitfields cannot cross word boundaries */
60
61 #define TARGET_NO_BITFIELD_TYPE (target_flags & MASK_NO_BITFIELD_TYPE)
62 #define TARGET_STRICT_ALIGN     (target_flags & MASK_STRICT_ALIGN)
63 #define TARGET_RELOCATABLE      (target_flags & MASK_RELOCATABLE)
64 #define TARGET_EABI             (target_flags & MASK_EABI)
65 #define TARGET_LITTLE_ENDIAN    (target_flags & MASK_LITTLE_ENDIAN)
66 #define TARGET_REGNAMES         (target_flags & MASK_REGNAMES)
67 #define TARGET_PROTOTYPE        (target_flags & MASK_PROTOTYPE)
68 #define TARGET_NO_BITFIELD_WORD (target_flags & MASK_NO_BITFIELD_WORD)
69 #define TARGET_TOC              ((target_flags & MASK_64BIT)            \
70                                  || ((target_flags & (MASK_RELOCATABLE  \
71                                                       | MASK_MINIMAL_TOC)) \
72                                      && flag_pic > 1)                   \
73                                  || DEFAULT_ABI == ABI_AIX)
74
75 #define TARGET_BITFIELD_TYPE    (! TARGET_NO_BITFIELD_TYPE)
76 #define TARGET_BIG_ENDIAN       (! TARGET_LITTLE_ENDIAN)
77 #define TARGET_NO_PROTOTYPE     (! TARGET_PROTOTYPE)
78 #define TARGET_NO_TOC           (! TARGET_TOC)
79 #define TARGET_NO_EABI          (! TARGET_EABI)
80
81 /* Strings provided by SUBTARGET_OPTIONS */
82 extern const char *rs6000_abi_name;
83 extern const char *rs6000_sdata_name;
84
85 /* Override rs6000.h definition.  */
86 #undef  SUBTARGET_OPTIONS
87 #define SUBTARGET_OPTIONS                                               \
88   { "call-",  &rs6000_abi_name, N_("Select ABI calling convention") },  \
89   { "sdata=", &rs6000_sdata_name, N_("Select method for sdata handling") }
90
91 /* Max # of bytes for variables to automatically be put into the .sdata
92    or .sdata2 sections.  */
93 extern int g_switch_value;              /* Value of the -G xx switch.  */
94 extern int g_switch_set;                /* Whether -G xx was passed.  */
95
96 #define SDATA_DEFAULT_SIZE 8
97
98 /* Note, V.4 no longer uses a normal TOC, so make -mfull-toc, be just
99    the same as -mminimal-toc.  */
100 /* Override rs6000.h definition.  */
101 #undef  SUBTARGET_SWITCHES
102 #define SUBTARGET_SWITCHES                                              \
103   { "bit-align",        -MASK_NO_BITFIELD_TYPE,                         \
104     N_("Align to the base type of the bit-field") },                    \
105   { "no-bit-align",      MASK_NO_BITFIELD_TYPE,                         \
106     N_("Don't align to the base type of the bit-field") },              \
107   { "strict-align",      MASK_STRICT_ALIGN,                             \
108     N_("Don't assume that unaligned accesses are handled by the system") }, \
109   { "no-strict-align",  -MASK_STRICT_ALIGN,                             \
110     N_("Assume that unaligned accesses are handled by the system") },   \
111   { "relocatable",       MASK_RELOCATABLE | MASK_MINIMAL_TOC | MASK_NO_FP_IN_TOC, \
112     N_("Produce code relocatable at runtime") },                        \
113   { "no-relocatable",   -MASK_RELOCATABLE,                              \
114     N_("Don't produce code relocatable at runtime") },                  \
115   { "relocatable-lib",   MASK_RELOCATABLE | MASK_MINIMAL_TOC | MASK_NO_FP_IN_TOC, \
116     N_("Produce code relocatable at runtime") },                        \
117   { "no-relocatable-lib", -MASK_RELOCATABLE,                            \
118     N_("Don't produce code relocatable at runtime") },                  \
119   { "little-endian",     MASK_LITTLE_ENDIAN,                            \
120     N_("Produce little endian code") },                                 \
121   { "little",            MASK_LITTLE_ENDIAN,                            \
122     N_("Produce little endian code") },                                 \
123   { "big-endian",       -MASK_LITTLE_ENDIAN,                            \
124     N_("Produce big endian code") },                                    \
125   { "big",              -MASK_LITTLE_ENDIAN,                            \
126     N_("Produce big endian code") },                                    \
127   { "no-toc",            0, N_("no description yet") },                 \
128   { "toc",               MASK_MINIMAL_TOC, N_("no description yet") },  \
129   { "full-toc",          MASK_MINIMAL_TOC, N_("no description yet") },  \
130   { "prototype",         MASK_PROTOTYPE, N_("no description yet") },    \
131   { "no-prototype",     -MASK_PROTOTYPE, N_("no description yet") },    \
132   { "no-traceback",      0, N_("no description yet") },                 \
133   { "eabi",              MASK_EABI, N_("Use EABI") },                   \
134   { "no-eabi",          -MASK_EABI, N_("Don't use EABI") },             \
135   { "bit-word",         -MASK_NO_BITFIELD_WORD, "" },                   \
136   { "no-bit-word",       MASK_NO_BITFIELD_WORD,                         \
137     N_("Do not allow bit-fields to cross word boundaries") },           \
138   { "regnames",           MASK_REGNAMES,                                \
139     N_("Use alternate register names") },                               \
140   { "no-regnames",       -MASK_REGNAMES,                                \
141     N_("Don't use alternate register names") },                         \
142   { "sdata",             0, N_("no description yet") },                 \
143   { "no-sdata",          0, N_("no description yet") },                 \
144   { "sim",               0,                                             \
145     N_("Link with libsim.a, libc.a and sim-crt0.o") },                  \
146   { "ads",               0,                                             \
147     N_("Link with libads.a, libc.a and crt0.o") },                      \
148   { "yellowknife",       0,                                             \
149     N_("Link with libyk.a, libc.a and crt0.o") },                       \
150   { "mvme",              0,                                             \
151     N_("Link with libmvme.a, libc.a and crt0.o") },                     \
152   { "emb",               0,                                             \
153     N_("Set the PPC_EMB bit in the ELF flags header") },                \
154   { "vxworks",           0, N_("no description yet") },                 \
155   { "shlib",             0, N_("no description yet") },                 \
156   EXTRA_SUBTARGET_SWITCHES                                              \
157   { "newlib",            0, N_("no description yet") },
158
159 /* This is meant to be redefined in the host dependent files.  */
160 #define EXTRA_SUBTARGET_SWITCHES
161
162 /* Sometimes certain combinations of command options do not make sense
163    on a particular target machine.  You can define a macro
164    `OVERRIDE_OPTIONS' to take account of this.  This macro, if
165    defined, is executed once just after all the command options have
166    been parsed.
167
168    The macro SUBTARGET_OVERRIDE_OPTIONS is provided for subtargets, to
169    get control.  */
170
171 #define SUBTARGET_OVERRIDE_OPTIONS                                      \
172 do {                                                                    \
173   if (!g_switch_set)                                                    \
174     g_switch_value = SDATA_DEFAULT_SIZE;                                \
175                                                                         \
176   if (!strcmp (rs6000_abi_name, "sysv"))                                \
177     rs6000_current_abi = ABI_V4;                                        \
178   else if (!strcmp (rs6000_abi_name, "sysv-noeabi"))                    \
179     {                                                                   \
180       rs6000_current_abi = ABI_V4;                                      \
181       target_flags &= ~ MASK_EABI;                                      \
182     }                                                                   \
183   else if (!strcmp (rs6000_abi_name, "sysv-eabi")                       \
184            || !strcmp (rs6000_abi_name, "eabi"))                        \
185     {                                                                   \
186       rs6000_current_abi = ABI_V4;                                      \
187       target_flags |= MASK_EABI;                                        \
188     }                                                                   \
189   else if (!strcmp (rs6000_abi_name, "aix"))                            \
190     {                                                                   \
191       rs6000_current_abi = ABI_AIX_NODESC;                              \
192       target_flags |= MASK_EABI;                                        \
193     }                                                                   \
194   else if (!strcmp (rs6000_abi_name, "aixdesc"))                        \
195     rs6000_current_abi = ABI_AIX;                                       \
196   else if (!strcmp (rs6000_abi_name, "freebsd"))                        \
197     rs6000_current_abi = ABI_V4;                                        \
198   else if (!strcmp (rs6000_abi_name, "linux"))                          \
199     rs6000_current_abi = ABI_V4;                                        \
200   else if (!strcmp (rs6000_abi_name, "gnu"))                            \
201     rs6000_current_abi = ABI_V4;                                        \
202   else if (!strcmp (rs6000_abi_name, "netbsd"))                         \
203     rs6000_current_abi = ABI_V4;                                        \
204   else if (!strcmp (rs6000_abi_name, "i960-old"))                       \
205     {                                                                   \
206       rs6000_current_abi = ABI_V4;                                      \
207       target_flags |= (MASK_LITTLE_ENDIAN | MASK_EABI                   \
208                        | MASK_NO_BITFIELD_WORD);                        \
209       target_flags &= ~MASK_STRICT_ALIGN;                               \
210     }                                                                   \
211   else                                                                  \
212     {                                                                   \
213       rs6000_current_abi = ABI_V4;                                      \
214       error ("bad value for -mcall-%s", rs6000_abi_name);               \
215     }                                                                   \
216                                                                         \
217   if (rs6000_sdata_name)                                                \
218     {                                                                   \
219       if (!strcmp (rs6000_sdata_name, "none"))                          \
220         rs6000_sdata = SDATA_NONE;                                      \
221       else if (!strcmp (rs6000_sdata_name, "data"))                     \
222         rs6000_sdata = SDATA_DATA;                                      \
223       else if (!strcmp (rs6000_sdata_name, "default"))                  \
224         rs6000_sdata = (TARGET_EABI) ? SDATA_EABI : SDATA_SYSV;         \
225       else if (!strcmp (rs6000_sdata_name, "sysv"))                     \
226         rs6000_sdata = SDATA_SYSV;                                      \
227       else if (!strcmp (rs6000_sdata_name, "eabi"))                     \
228         rs6000_sdata = SDATA_EABI;                                      \
229       else                                                              \
230         error ("bad value for -msdata=%s", rs6000_sdata_name);          \
231     }                                                                   \
232   else if (DEFAULT_ABI == ABI_V4)                                       \
233     {                                                                   \
234       rs6000_sdata = SDATA_DATA;                                        \
235       rs6000_sdata_name = "data";                                       \
236     }                                                                   \
237   else                                                                  \
238     {                                                                   \
239       rs6000_sdata = SDATA_NONE;                                        \
240       rs6000_sdata_name = "none";                                       \
241     }                                                                   \
242                                                                         \
243   if (TARGET_RELOCATABLE &&                                             \
244       (rs6000_sdata == SDATA_EABI || rs6000_sdata == SDATA_SYSV))       \
245     {                                                                   \
246       rs6000_sdata = SDATA_DATA;                                        \
247       error ("-mrelocatable and -msdata=%s are incompatible",           \
248              rs6000_sdata_name);                                        \
249     }                                                                   \
250                                                                         \
251   else if (flag_pic &&                                                  \
252            (rs6000_sdata == SDATA_EABI || rs6000_sdata == SDATA_SYSV))  \
253     {                                                                   \
254       rs6000_sdata = SDATA_DATA;                                        \
255       error ("-f%s and -msdata=%s are incompatible",                    \
256              (flag_pic > 1) ? "PIC" : "pic",                            \
257              rs6000_sdata_name);                                        \
258     }                                                                   \
259                                                                         \
260   if (rs6000_sdata != SDATA_NONE && DEFAULT_ABI != ABI_V4)              \
261     {                                                                   \
262       rs6000_sdata = SDATA_NONE;                                        \
263       error ("-msdata=%s and -mcall-%s are incompatible",               \
264              rs6000_sdata_name, rs6000_abi_name);                       \
265     }                                                                   \
266                                                                         \
267   if (TARGET_RELOCATABLE && !TARGET_MINIMAL_TOC)                        \
268     {                                                                   \
269       target_flags |= MASK_MINIMAL_TOC;                                 \
270       error ("-mrelocatable and -mno-minimal-toc are incompatible");    \
271     }                                                                   \
272                                                                         \
273   if (TARGET_RELOCATABLE && rs6000_current_abi == ABI_AIX)              \
274     {                                                                   \
275       target_flags &= ~MASK_RELOCATABLE;                                \
276       error ("-mrelocatable and -mcall-%s are incompatible",            \
277              rs6000_abi_name);                                          \
278     }                                                                   \
279                                                                         \
280   if (flag_pic > 1 && rs6000_current_abi == ABI_AIX)                    \
281     {                                                                   \
282       flag_pic = 0;                                                     \
283       error ("-fPIC and -mcall-%s are incompatible",                    \
284              rs6000_abi_name);                                          \
285     }                                                                   \
286                                                                         \
287   if (rs6000_current_abi == ABI_AIX && TARGET_LITTLE_ENDIAN)            \
288     {                                                                   \
289       target_flags &= ~MASK_LITTLE_ENDIAN;                              \
290       error ("-mcall-aixdesc must be big endian");                      \
291     }                                                                   \
292                                                                         \
293   /* Treat -fPIC the same as -mrelocatable.  */                         \
294   if (flag_pic > 1)                                                     \
295     target_flags |= MASK_RELOCATABLE | MASK_MINIMAL_TOC | MASK_NO_FP_IN_TOC; \
296                                                                         \
297   else if (TARGET_RELOCATABLE)                                          \
298     flag_pic = 2;                                                       \
299                                                                         \
300 } while (0)
301
302
303 /* Override rs6000.h definition.  */
304 #undef  TARGET_DEFAULT
305 #define TARGET_DEFAULT (MASK_POWERPC | MASK_NEW_MNEMONICS)
306
307 /* Override rs6000.h definition.  */
308 #undef  PROCESSOR_DEFAULT
309 #define PROCESSOR_DEFAULT PROCESSOR_PPC750
310
311 #define FIXED_R2 1
312 /* System V.4 uses register 13 as a pointer to the small data area,
313    so it is not available to the normal user.  */
314 #define FIXED_R13 1
315
316 /* Size of the V.4 varargs area if needed.  */
317 /* Override rs6000.h definition.  */
318 #undef  RS6000_VARARGS_AREA
319 #define RS6000_VARARGS_AREA ((cfun->machine->sysv_varargs_p) ? RS6000_VARARGS_SIZE : 0)
320
321 /* Override default big endianism definitions in rs6000.h.  */
322 #undef  BYTES_BIG_ENDIAN
323 #undef  WORDS_BIG_ENDIAN
324 #define BYTES_BIG_ENDIAN (TARGET_BIG_ENDIAN)
325 #define WORDS_BIG_ENDIAN (TARGET_BIG_ENDIAN)
326
327 /* Define this to set the endianness to use in libgcc2.c, which can
328    not depend on target_flags.  */
329 #if !defined(_LITTLE_ENDIAN) && !defined(__sun__)
330 #define LIBGCC2_WORDS_BIG_ENDIAN 1
331 #else
332 #define LIBGCC2_WORDS_BIG_ENDIAN 0
333 #endif
334
335 /* Define cutoff for using external functions to save floating point.
336    Currently on V.4, always use inline stores.  */
337 #define FP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) < 64)
338
339 /* Put jump tables in read-only memory, rather than in .text.  */
340 #define JUMP_TABLES_IN_TEXT_SECTION 0
341
342 /* Prefix and suffix to use to saving floating point.  */
343 #define SAVE_FP_PREFIX "_savefpr_"
344 #define SAVE_FP_SUFFIX "_l"
345
346 /* Prefix and suffix to use to restoring floating point.  */
347 #define RESTORE_FP_PREFIX "_restfpr_"
348 #define RESTORE_FP_SUFFIX "_l"
349
350 /* Type used for ptrdiff_t, as a string used in a declaration.  */
351 #define PTRDIFF_TYPE "int"
352
353 /* Type used for wchar_t, as a string used in a declaration.  */
354 /* Override svr4.h definition.  */
355 #undef  WCHAR_TYPE
356 #define WCHAR_TYPE "long int"
357
358 /* Width of wchar_t in bits.  */
359 /* Override svr4.h definition.  */
360 #undef  WCHAR_TYPE_SIZE
361 #define WCHAR_TYPE_SIZE 32
362
363 /* Make int foo : 8 not cause structures to be aligned to an int boundary.  */
364 /* Override elfos.h definition.  */
365 #undef  PCC_BITFIELD_TYPE_MATTERS
366 #define PCC_BITFIELD_TYPE_MATTERS (TARGET_BITFIELD_TYPE)
367
368 #undef  BITFIELD_NBYTES_LIMITED
369 #define BITFIELD_NBYTES_LIMITED (TARGET_NO_BITFIELD_WORD)
370
371 /* Define this macro to be the value 1 if instructions will fail to
372    work if given data not on the nominal alignment.  If instructions
373    will merely go slower in that case, define this macro as 0.  */
374 #undef  STRICT_ALIGNMENT
375 #define STRICT_ALIGNMENT (TARGET_STRICT_ALIGN)
376
377 /* Alignment in bits of the stack boundary.  Note, in order to allow building
378    one set of libraries with -mno-eabi instead of eabi libraries and non-eabi
379    versions, just use 64 as the stack boundary.  */
380 #undef  STACK_BOUNDARY
381 #define STACK_BOUNDARY  (TARGET_ALTIVEC_ABI ? 128 : 64)
382
383 /* Real stack boundary as mandated by the appropriate ABI.  */
384 #define ABI_STACK_BOUNDARY ((TARGET_EABI && !TARGET_ALTIVEC_ABI) ? 64 : 128)
385
386 /* No data type wants to be aligned rounder than this.  */
387 #undef  BIGGEST_ALIGNMENT
388 #define BIGGEST_ALIGNMENT (TARGET_EABI ? 64 : 128)
389
390 /* An expression for the alignment of a structure field FIELD if the
391    alignment computed in the usual way is COMPUTED.  */
392 #define ADJUST_FIELD_ALIGN(FIELD, COMPUTED)                                   \
393         ((TARGET_ALTIVEC && TREE_CODE (TREE_TYPE (FIELD)) == VECTOR_TYPE)     \
394          ? 128 : COMPUTED)
395
396 /* Define this macro as an expression for the alignment of a type
397    (given by TYPE as a tree node) if the alignment computed in the
398    usual way is COMPUTED and the alignment explicitly specified was
399    SPECIFIED.  */
400 #define ROUND_TYPE_ALIGN(TYPE, COMPUTED, SPECIFIED)                     \
401         ((TARGET_ALTIVEC  && TREE_CODE (TYPE) == VECTOR_TYPE)           \
402          ? MAX (MAX ((COMPUTED), (SPECIFIED)), 128)                     \
403          : MAX (COMPUTED, SPECIFIED))
404
405 #undef  BIGGEST_FIELD_ALIGNMENT
406 #undef  ADJUST_FIELD_ALIGN
407
408 /* Use ELF style section commands.  */
409
410 #define TEXT_SECTION_ASM_OP     "\t.section\t\".text\""
411
412 #define DATA_SECTION_ASM_OP     "\t.section\t\".data\""
413
414 #define BSS_SECTION_ASM_OP      "\t.section\t\".bss\""
415
416 /* Override elfos.h definition.  */
417 #undef  INIT_SECTION_ASM_OP
418 #define INIT_SECTION_ASM_OP "\t.section\t\".init\",\"ax\""
419
420 /* Override elfos.h definition.  */
421 #undef  FINI_SECTION_ASM_OP
422 #define FINI_SECTION_ASM_OP "\t.section\t\".fini\",\"ax\""
423
424 #define TOC_SECTION_ASM_OP "\t.section\t\".got\",\"aw\""
425
426 /* Put PC relative got entries in .got2.  */
427 #define MINIMAL_TOC_SECTION_ASM_OP \
428   ((TARGET_RELOCATABLE || flag_pic) ? "\t.section\t\".got2\",\"aw\"" : "\t.section\t\".got1\",\"aw\"")
429
430 #define SDATA_SECTION_ASM_OP "\t.section\t\".sdata\",\"aw\""
431 #define SDATA2_SECTION_ASM_OP "\t.section\t\".sdata2\",\"a\""
432 #define SBSS_SECTION_ASM_OP "\t.section\t\".sbss\",\"aw\",@nobits"
433
434 /* Besides the usual ELF sections, we need a toc section.  */
435 /* Override elfos.h definition.  */
436 #undef  EXTRA_SECTIONS
437 #define EXTRA_SECTIONS in_const, in_toc, in_sdata, in_sdata2, in_sbss, in_init, in_fini
438
439 /* Override elfos.h definition.  */
440 #undef  EXTRA_SECTION_FUNCTIONS
441 #define EXTRA_SECTION_FUNCTIONS                                         \
442   CONST_SECTION_FUNCTION                                                \
443   TOC_SECTION_FUNCTION                                                  \
444   SDATA_SECTION_FUNCTION                                                \
445   SDATA2_SECTION_FUNCTION                                               \
446   SBSS_SECTION_FUNCTION                                                 \
447   INIT_SECTION_FUNCTION                                                 \
448   FINI_SECTION_FUNCTION
449
450 #define TOC_SECTION_FUNCTION                                            \
451 void                                                                    \
452 toc_section ()                                                          \
453 {                                                                       \
454   if (in_section != in_toc)                                             \
455     {                                                                   \
456       in_section = in_toc;                                              \
457       if (DEFAULT_ABI == ABI_AIX                                        \
458           && TARGET_MINIMAL_TOC                                         \
459           && !TARGET_RELOCATABLE)                                       \
460         {                                                               \
461           if (! toc_initialized)                                        \
462             {                                                           \
463               toc_initialized = 1;                                      \
464               fprintf (asm_out_file, "%s\n", TOC_SECTION_ASM_OP);       \
465               ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LCTOC", 0);     \
466               fprintf (asm_out_file, "\t.tc ");                         \
467               ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1[TC],"); \
468               ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1"); \
469               fprintf (asm_out_file, "\n");                             \
470                                                                         \
471               fprintf (asm_out_file, "%s\n", MINIMAL_TOC_SECTION_ASM_OP); \
472               ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1"); \
473               fprintf (asm_out_file, " = .+32768\n");                   \
474             }                                                           \
475           else                                                          \
476             fprintf (asm_out_file, "%s\n", MINIMAL_TOC_SECTION_ASM_OP); \
477         }                                                               \
478       else if (DEFAULT_ABI == ABI_AIX && !TARGET_RELOCATABLE)           \
479         fprintf (asm_out_file, "%s\n", TOC_SECTION_ASM_OP);             \
480       else                                                              \
481         {                                                               \
482           fprintf (asm_out_file, "%s\n", MINIMAL_TOC_SECTION_ASM_OP);   \
483           if (! toc_initialized)                                        \
484             {                                                           \
485               ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1"); \
486               fprintf (asm_out_file, " = .+32768\n");                   \
487               toc_initialized = 1;                                      \
488             }                                                           \
489         }                                                               \
490     }                                                                   \
491 }                                                                       \
492                                                                         \
493 extern int in_toc_section PARAMS ((void));                              \
494 int in_toc_section ()                                                   \
495 {                                                                       \
496   return in_section == in_toc;                                          \
497 }
498
499 #define SDATA_SECTION_FUNCTION                                          \
500 void                                                                    \
501 sdata_section ()                                                        \
502 {                                                                       \
503   if (in_section != in_sdata)                                           \
504     {                                                                   \
505       in_section = in_sdata;                                            \
506       fprintf (asm_out_file, "%s\n", SDATA_SECTION_ASM_OP);             \
507     }                                                                   \
508 }
509
510 #define SDATA2_SECTION_FUNCTION                                         \
511 void                                                                    \
512 sdata2_section ()                                                       \
513 {                                                                       \
514   if (in_section != in_sdata2)                                          \
515     {                                                                   \
516       in_section = in_sdata2;                                           \
517       fprintf (asm_out_file, "%s\n", SDATA2_SECTION_ASM_OP);            \
518     }                                                                   \
519 }
520
521 #define SBSS_SECTION_FUNCTION                                           \
522 void                                                                    \
523 sbss_section ()                                                         \
524 {                                                                       \
525   if (in_section != in_sbss)                                            \
526     {                                                                   \
527       in_section = in_sbss;                                             \
528       fprintf (asm_out_file, "%s\n", SBSS_SECTION_ASM_OP);              \
529     }                                                                   \
530 }
531
532 #define INIT_SECTION_FUNCTION                                           \
533 void                                                                    \
534 init_section ()                                                         \
535 {                                                                       \
536   if (in_section != in_init)                                            \
537     {                                                                   \
538       in_section = in_init;                                             \
539       fprintf (asm_out_file, "%s\n", INIT_SECTION_ASM_OP);              \
540     }                                                                   \
541 }
542
543 #define FINI_SECTION_FUNCTION                                           \
544 void                                                                    \
545 fini_section ()                                                         \
546 {                                                                       \
547   if (in_section != in_fini)                                            \
548     {                                                                   \
549       in_section = in_fini;                                             \
550       fprintf (asm_out_file, "%s\n", FINI_SECTION_ASM_OP);              \
551     }                                                                   \
552 }
553
554 /* A C statement or statements to switch to the appropriate section
555    for output of RTX in mode MODE.  You can assume that RTX is some
556    kind of constant in RTL.  The argument MODE is redundant except in
557    the case of a `const_int' rtx.  Select the section by calling
558    `text_section' or one of the alternatives for other sections.
559
560    Do not define this macro if you put all constants in the read-only
561    data section.  */
562
563 /* Override elfos.h definition.  */
564 #undef  SELECT_RTX_SECTION
565 #define SELECT_RTX_SECTION(MODE, X, ALIGN) rs6000_select_rtx_section (MODE, X)
566
567 /* A C statement or statements to switch to the appropriate
568    section for output of DECL.  DECL is either a `VAR_DECL' node
569    or a constant of some sort.  RELOC indicates whether forming
570    the initial value of DECL requires link-time relocations.  */
571
572 /* Override elfos.h definition.  */
573 #undef  SELECT_SECTION
574 #define SELECT_SECTION(DECL, RELOC, ALIGN) rs6000_select_section (DECL, RELOC)
575
576 /* A C statement to build up a unique section name, expressed as a
577    STRING_CST node, and assign it to DECL_SECTION_NAME (decl).
578    RELOC indicates whether the initial value of EXP requires
579    link-time relocations.  If you do not define this macro, GCC will use
580    the symbol name prefixed by `.' as the section name.  Note - this
581    macro can now be called for uninitialized data items as well as
582    initialised data and functions.  */
583
584 /* Override elfos.h definition.  */
585 #undef  UNIQUE_SECTION
586 #define UNIQUE_SECTION(DECL, RELOC) rs6000_unique_section (DECL, RELOC)
587
588 /* Return non-zero if this entry is to be written into the constant pool
589    in a special way.  We do so if this is a SYMBOL_REF, LABEL_REF or a CONST
590    containing one of them.  If -mfp-in-toc (the default), we also do
591    this for floating-point constants.  We actually can only do this
592    if the FP formats of the target and host machines are the same, but
593    we can't check that since not every file that uses
594    GO_IF_LEGITIMATE_ADDRESS_P includes real.h.
595
596    Unlike AIX, we don't key off of -mminimal-toc, but instead do not
597    allow floating point constants in the TOC if -mrelocatable.  */
598
599 #undef  ASM_OUTPUT_SPECIAL_POOL_ENTRY_P
600 #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE)                        \
601   (TARGET_TOC                                                           \
602    && (GET_CODE (X) == SYMBOL_REF                                       \
603        || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS      \
604            && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF)           \
605        || GET_CODE (X) == LABEL_REF                                     \
606        || (GET_CODE (X) == CONST_INT                                    \
607            && GET_MODE_BITSIZE (MODE) <= GET_MODE_BITSIZE (Pmode))      \
608        || (!TARGET_NO_FP_IN_TOC                                         \
609            && !TARGET_RELOCATABLE                                       \
610            && GET_CODE (X) == CONST_DOUBLE                              \
611            && GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT               \
612            && BITS_PER_WORD == HOST_BITS_PER_INT)))
613
614 /* These macros generate the special .type and .size directives which
615    are used to set the corresponding fields of the linker symbol table
616    entries in an ELF object file under SVR4.  These macros also output
617    the starting labels for the relevant functions/objects.  */
618
619 /* Write the extra assembler code needed to declare a function properly.
620    Some svr4 assemblers need to also have something extra said about the
621    function's return value.  We allow for that here.  */
622
623 extern int rs6000_pic_labelno;
624
625 /* Override elfos.h definition.  */
626 #undef  ASM_DECLARE_FUNCTION_NAME
627 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
628   do {                                                                  \
629     const char *const init_ptr = (TARGET_64BIT) ? ".quad" : ".long";    \
630                                                                         \
631     if (TARGET_RELOCATABLE                                              \
632         && (get_pool_size () != 0 || current_function_profile)          \
633         && uses_TOC())                                                  \
634       {                                                                 \
635         char buf[256];                                                  \
636                                                                         \
637         ASM_OUTPUT_INTERNAL_LABEL (FILE, "LCL", rs6000_pic_labelno);    \
638                                                                         \
639         ASM_GENERATE_INTERNAL_LABEL (buf, "LCTOC", 1);                  \
640         fprintf (FILE, "\t%s ", init_ptr);                              \
641         assemble_name (FILE, buf);                                      \
642         putc ('-', FILE);                                               \
643         ASM_GENERATE_INTERNAL_LABEL (buf, "LCF", rs6000_pic_labelno);   \
644         assemble_name (FILE, buf);                                      \
645         putc ('\n', FILE);                                              \
646       }                                                                 \
647                                                                         \
648     fprintf (FILE, "%s", TYPE_ASM_OP);                                  \
649     assemble_name (FILE, NAME);                                         \
650     putc (',', FILE);                                                   \
651     fprintf (FILE, TYPE_OPERAND_FMT, "function");                       \
652     putc ('\n', FILE);                                                  \
653     ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL));                      \
654                                                                         \
655     if (DEFAULT_ABI == ABI_AIX)                                         \
656       {                                                                 \
657         const char *desc_name, *orig_name;                              \
658                                                                         \
659         STRIP_NAME_ENCODING (orig_name, NAME);                          \
660         desc_name = orig_name;                                          \
661         while (*desc_name == '.')                                       \
662           desc_name++;                                                  \
663                                                                         \
664         if (TREE_PUBLIC (DECL))                                         \
665           fprintf (FILE, "\t.globl %s\n", desc_name);                   \
666                                                                         \
667         fprintf (FILE, "%s\n", MINIMAL_TOC_SECTION_ASM_OP);             \
668         fprintf (FILE, "%s:\n", desc_name);                             \
669         fprintf (FILE, "\t%s %s\n", init_ptr, orig_name);               \
670         fprintf (FILE, "\t%s _GLOBAL_OFFSET_TABLE_\n", init_ptr);       \
671         if (DEFAULT_ABI == ABI_AIX)                                     \
672           fprintf (FILE, "\t%s 0\n", init_ptr);                         \
673         fprintf (FILE, "\t.previous\n");                                \
674       }                                                                 \
675     ASM_OUTPUT_LABEL (FILE, NAME);                                      \
676   } while (0)
677
678 /* A C compound statement that outputs the assembler code for a thunk function,
679     used to implement C++ virtual function calls with multiple inheritance.  The
680     thunk acts as a wrapper around a virtual function, adjusting the implicit
681     object parameter before handing control off to the real function.
682
683     First, emit code to add the integer DELTA to the location that contains the
684     incoming first argument.  Assume that this argument contains a pointer, and
685     is the one used to pass the this' pointer in C++.  This is the incoming
686     argument *before* the function prologue, e.g. %o0' on a sparc.  The
687     addition must preserve the values of all other incoming arguments.
688
689     After the addition, emit code to jump to FUNCTION, which is a
690     FUNCTION_DECL'.  This is a direct pure jump, not a call, and does not touch
691     the return address.  Hence returning from FUNCTION will return to whoever
692     called the current thunk'.
693
694     The effect must be as if FUNCTION had been called directly with the adjusted
695     first argument.  This macro is responsible for emitting all of the code for
696     a thunk function; FUNCTION_PROLOGUE' and FUNCTION_EPILOGUE' are not
697     invoked.
698
699     The THUNK_FNDECL is redundant.  (DELTA and FUNCTION have already been
700     extracted from it.)  It might possibly be useful on some targets, but
701     probably not.
702
703     If you do not define this macro, the target-independent code in the C++
704     frontend will generate a less efficient heavyweight thunk that calls
705     FUNCTION instead of jumping to it.  The generic approach does not support
706     varargs.  */
707
708 #define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION) \
709   output_mi_thunk (FILE, THUNK_FNDECL, DELTA, FUNCTION)
710
711 /* The USER_LABEL_PREFIX stuff is affected by the -fleading-underscore
712    flag.  The LOCAL_LABEL_PREFIX variable is used by dbxelf.h.  */
713
714 #define LOCAL_LABEL_PREFIX "."
715 #define USER_LABEL_PREFIX ""
716
717 /* svr4.h overrides ASM_OUTPUT_INTERNAL_LABEL.  */
718
719 #define ASM_OUTPUT_INTERNAL_LABEL_PREFIX(FILE,PREFIX)   \
720   asm_fprintf (FILE, "%L%s", PREFIX)
721
722 #define ASM_OUTPUT_LABEL(FILE,NAME)     \
723   (assemble_name (FILE, NAME), fputs (":\n", FILE))
724
725 /* This is how to output a command to make the user-level label named NAME
726    defined for reference from other files.  */
727
728 #define ASM_GLOBALIZE_LABEL(FILE,NAME)  \
729   do { fputs ("\t.globl ", FILE);       \
730        assemble_name (FILE, NAME); putc ('\n', FILE);} while (0)
731
732 /* This says how to output assembler code to declare an
733    uninitialized internal linkage data object.  Under SVR4,
734    the linker seems to want the alignment of data objects
735    to depend on their types.  We do exactly that here.  */
736
737 #define LOCAL_ASM_OP    "\t.local\t"
738
739 #define LCOMM_ASM_OP    "\t.lcomm\t"
740
741 /* Override elfos.h definition.  */
742 #undef  ASM_OUTPUT_ALIGNED_LOCAL
743 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
744 do {                                                                    \
745   if (rs6000_sdata != SDATA_NONE && (SIZE) > 0                          \
746       && (SIZE) <= g_switch_value)                                      \
747     {                                                                   \
748       sbss_section ();                                                  \
749       ASM_OUTPUT_ALIGN (FILE, exact_log2 (ALIGN / BITS_PER_UNIT));      \
750       ASM_OUTPUT_LABEL (FILE, NAME);                                    \
751       ASM_OUTPUT_SKIP (FILE, SIZE);                                     \
752       if (!flag_inhibit_size_directive && (SIZE) > 0)                   \
753         {                                                               \
754           fprintf (FILE, "%s", SIZE_ASM_OP);                            \
755           assemble_name (FILE, NAME);                                   \
756           fprintf (FILE, ",%d\n",  SIZE);                               \
757         }                                                               \
758     }                                                                   \
759   else                                                                  \
760     {                                                                   \
761       fprintf (FILE, "%s", LCOMM_ASM_OP);                               \
762       assemble_name ((FILE), (NAME));                                   \
763       fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT);    \
764     }                                                                   \
765 } while (0)
766
767 /* Describe how to emit uninitialized external linkage items.  */
768 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN)           \
769 do {                                                                    \
770   ASM_GLOBALIZE_LABEL (FILE, NAME);                                     \
771   ASM_OUTPUT_ALIGNED_LOCAL (FILE, NAME, SIZE, ALIGN);                   \
772 } while (0)
773
774 /* Switch  Recognition by gcc.c.  Add -G xx support.  */
775
776 /* Override svr4.h definition.  */
777 #undef  SWITCH_TAKES_ARG
778 #define SWITCH_TAKES_ARG(CHAR)                                          \
779   ((CHAR) == 'D' || (CHAR) == 'U' || (CHAR) == 'o'                      \
780    || (CHAR) == 'e' || (CHAR) == 'T' || (CHAR) == 'u'                   \
781    || (CHAR) == 'I' || (CHAR) == 'm' || (CHAR) == 'x'                   \
782    || (CHAR) == 'L' || (CHAR) == 'A' || (CHAR) == 'V'                   \
783    || (CHAR) == 'B' || (CHAR) == 'b' || (CHAR) == 'G')
784
785 /* Output .file.  */
786 /* Override elfos.h definition.  */
787 #undef  ASM_FILE_START
788 #define ASM_FILE_START(FILE)                                            \
789 do {                                                                    \
790   output_file_directive ((FILE), main_input_filename);                  \
791   rs6000_file_start (FILE, TARGET_CPU_DEFAULT);                         \
792 } while (0)
793
794
795 extern int fixuplabelno;
796
797 /* Handle constructors specially for -mrelocatable.  */
798 #define TARGET_ASM_CONSTRUCTOR  rs6000_elf_asm_out_constructor
799 #define TARGET_ASM_DESTRUCTOR   rs6000_elf_asm_out_destructor
800
801 /* This is the end of what might become sysv4.h.  */
802
803 /* Use DWARF 2 debugging information by default.  */
804 #undef  PREFERRED_DEBUGGING_TYPE
805 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
806
807 /* Historically we have also supported stabs debugging.  */
808 #define DBX_DEBUGGING_INFO
809
810 /* If we are referencing a function that is static or is known to be
811    in this file, make the SYMBOL_REF special.  We can use this to indicate
812    that we can branch to this function without emitting a no-op after the
813    call.  For real AIX calling sequences, we also replace the
814    function name with the real name (1 or 2 leading .'s), rather than
815    the function descriptor name.  This saves a lot of overriding code
816    to read the prefixes.  */
817
818 #undef  ENCODE_SECTION_INFO
819 #define ENCODE_SECTION_INFO(DECL) rs6000_encode_section_info (DECL)
820
821 /* The ELF version doesn't encode [DS] or whatever at the end of symbols.  */
822
823 #define RS6000_OUTPUT_BASENAME(FILE, NAME)      \
824     assemble_name (FILE, NAME)
825
826 /* This macro gets just the user-specified name
827    out of the string in a SYMBOL_REF.  Discard
828    a leading * or @.  */
829 #define STRIP_NAME_ENCODING(VAR,SYMBOL_NAME)                            \
830 do {                                                                    \
831   const char *_name = SYMBOL_NAME;                                      \
832   while (*_name == '*' || *_name == '@')                                \
833     _name++;                                                            \
834   (VAR) = _name;                                                        \
835 } while (0)
836
837 /* This is how to output a reference to a user-level label named NAME.
838    `assemble_name' uses this.  */
839
840 /* Override elfos.h definition.  */
841 #undef  ASM_OUTPUT_LABELREF
842 #define ASM_OUTPUT_LABELREF(FILE,NAME)          \
843 do {                                            \
844   const char *_name = NAME;                     \
845   if (*_name == '@')                            \
846     _name++;                                    \
847                                                 \
848   if (*_name == '*')                            \
849     fprintf (FILE, "%s", _name + 1);            \
850   else                                          \
851     asm_fprintf (FILE, "%U%s", _name);          \
852 } while (0)
853
854 /* But, to make this work, we have to output the stabs for the function
855    name *first*...  */
856
857 #define DBX_FUNCTION_FIRST
858
859 /* This is the end of what might become sysv4dbx.h.  */
860
861 #ifndef TARGET_VERSION
862 #define TARGET_VERSION fprintf (stderr, " (PowerPC System V.4)");
863 #endif
864 \f
865 #ifndef CPP_PREDEFINES
866 #define CPP_PREDEFINES \
867   "-DPPC -Dunix -D__svr4__ -Asystem=unix -Asystem=svr4 -Acpu=powerpc -Amachine=powerpc"
868 #endif
869
870 /* Pass various options to the assembler.  */
871 /* Override svr4.h definition.  */
872 #undef  ASM_SPEC
873 #define ASM_SPEC "%(asm_cpu) \
874 %{.s: %{mregnames} %{mno-regnames}} %{.S: %{mregnames} %{mno-regnames}} \
875 %{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*} \
876 %{mrelocatable} %{mrelocatable-lib} %{fpic:-K PIC} %{fPIC:-K PIC} \
877 %{memb} %{!memb: %{msdata: -memb} %{msdata=eabi: -memb}} \
878 %{mlittle} %{mlittle-endian} %{mbig} %{mbig-endian} \
879 %{!mlittle: %{!mlittle-endian: %{!mbig: %{!mbig-endian: \
880     %{mcall-freebsd: -mbig} \
881     %{mcall-i960-old: -mlittle} \
882     %{mcall-linux: -mbig} \
883     %{mcall-gnu: -mbig} \
884     %{mcall-netbsd: -mbig} \
885 }}}}"
886
887 #define CC1_ENDIAN_BIG_SPEC ""
888
889 #define CC1_ENDIAN_LITTLE_SPEC "\
890 %{!mstrict-align: %{!mno-strict-align: \
891     %{!mcall-i960-old: \
892         -mstrict-align \
893     } \
894 }}"
895
896 #define CC1_ENDIAN_DEFAULT_SPEC "%(cc1_endian_big)"
897
898 /* Pass -G xxx to the compiler and set correct endian mode.  */
899 #define CC1_SPEC "%{G*} \
900 %{mlittle: %(cc1_endian_little)} %{!mlittle: %{mlittle-endian: %(cc1_endian_little)}} \
901 %{mbig: %(cc1_endian_big)} %{!mbig: %{mbig-endian: %(cc1_endian_big)}} \
902 %{!mlittle: %{!mlittle-endian: %{!mbig: %{!mbig-endian: \
903     %{mcall-aixdesc: -mbig %(cc1_endian_big) } \
904     %{mcall-freebsd: -mbig %(cc1_endian_big) } \
905     %{mcall-i960-old: -mlittle %(cc1_endian_little) } \
906     %{mcall-linux: -mbig %(cc1_endian_big) } \
907     %{mcall-gnu: -mbig %(cc1_endian_big) } \
908     %{mcall-netbsd: -mbig %(cc1_endian_big) } \
909     %{!mcall-aixdesc: %{!mcall-freebsd: %{!mcall-i960-old: %{!mcall-linux: %{!mcall-gnu: %{!mcall-netbsd: \
910             %(cc1_endian_default) \
911     }}}}}} \
912 }}}} \
913 %{mno-sdata: -msdata=none } \
914 %{meabi: %{!mcall-*: -mcall-sysv }} \
915 %{!meabi: %{!mno-eabi: \
916     %{mrelocatable: -meabi } \
917     %{mcall-freebsd: -mno-eabi } \
918     %{mcall-i960-old: -meabi } \
919     %{mcall-linux: -mno-eabi } \
920     %{mcall-gnu: -mno-eabi } \
921     %{mcall-netbsd: -mno-eabi }}} \
922 %{msdata: -msdata=default} \
923 %{mno-sdata: -msdata=none} \
924 %{profile: -p}"
925
926 /* Don't put -Y P,<path> for cross compilers.  */
927 #ifndef CROSS_COMPILE
928 #define LINK_PATH_SPEC "\
929 %{!R*:%{L*:-R %*}} \
930 %{!nostdlib: %{!YP,*: \
931     %{compat-bsd: \
932         %{p:-Y P,/usr/ucblib:/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
933         %{!p:-Y P,/usr/ucblib:/usr/ccs/lib:/usr/lib}} \
934         %{!R*: %{!L*: -R /usr/ucblib}} \
935     %{!compat-bsd: \
936         %{p:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
937         %{!p:-Y P,/usr/ccs/lib:/usr/lib}}}}"
938
939 #else
940 #define LINK_PATH_SPEC ""
941 #endif
942
943 /* Default starting address if specified.  */
944 #define LINK_START_SPEC "\
945 %{mads: %(link_start_ads) } \
946 %{myellowknife: %(link_start_yellowknife) } \
947 %{mmvme: %(link_start_mvme) } \
948 %{msim: %(link_start_sim) } \
949 %{mcall-freebsd: %(link_start_freebsd) } \
950 %{mcall-linux: %(link_start_linux) } \
951 %{mcall-gnu: %(link_start_gnu) } \
952 %{mcall-netbsd: %(link_start_netbsd) } \
953 %{!mads: %{!myellowknife: %{!mmvme: %{!msim: %{!mcall-linux: %{!mcall-gnu: \
954         %{!mcall-netbsd: %{!mcall-freebsd: %(link_start_default) }}}}}}}}"
955
956 #define LINK_START_DEFAULT_SPEC ""
957
958 /* Override svr4.h definition.  */
959 #undef  LINK_SPEC
960 #define LINK_SPEC "\
961 %{h*} %{v:-V} %{!msdata=none:%{G*}} %{msdata=none:-G0} \
962 %{YP,*} %{R*} \
963 %{Qy:} %{!Qn:-Qy} \
964 %(link_shlib) \
965 %{!Wl,-T*: %{!T*: %(link_start) }} \
966 %(link_target) \
967 %(link_os)"
968
969 /* For now, turn off shared libraries by default.  */
970 #ifndef SHARED_LIB_SUPPORT
971 #define NO_SHARED_LIB_SUPPORT
972 #endif
973
974 #ifndef NO_SHARED_LIB_SUPPORT
975 /* Shared libraries are default.  */
976 #define LINK_SHLIB_SPEC "\
977 %{!static: %(link_path) %{!R*:%{L*:-R %*}}} \
978 %{mshlib: } \
979 %{static:-dn -Bstatic} \
980 %{shared:-G -dy -z text} \
981 %{symbolic:-Bsymbolic -G -dy -z text}"
982
983 #else
984 /* Shared libraries are not default.  */
985 #define LINK_SHLIB_SPEC "\
986 %{mshlib: %(link_path) } \
987 %{!mshlib: %{!shared: %{!symbolic: -dn -Bstatic}}} \
988 %{static: } \
989 %{shared:-G -dy -z text %(link_path) } \
990 %{symbolic:-Bsymbolic -G -dy -z text %(link_path) }"
991 #endif
992
993 /* Override the default target of the linker.  */
994 #define LINK_TARGET_SPEC "\
995 %{mlittle: --oformat elf32-powerpcle } %{mlittle-endian: --oformat elf32-powerpcle } \
996 %{!mlittle: %{!mlittle-endian: %{!mbig: %{!mbig-endian: \
997     %{mcall-i960-old: --oformat elf32-powerpcle} \
998   }}}}"
999
1000 /* Any specific OS flags.  */
1001 #define LINK_OS_SPEC "\
1002 %{mads: %(link_os_ads) } \
1003 %{myellowknife: %(link_os_yellowknife) } \
1004 %{mmvme: %(link_os_mvme) } \
1005 %{msim: %(link_os_sim) } \
1006 %{mcall-freebsd: %(link_os_freebsd) } \
1007 %{mcall-linux: %(link_os_linux) } \
1008 %{mcall-gnu: %(link_os_gnu) } \
1009 %{mcall-netbsd: %(link_os_netbsd) } \
1010 %{!mads: %{!myellowknife: %{!mmvme: %{!msim: %{!mcall-freebsd: %{!mcall-linux: %{!mcall-gnu: %{!mcall-netbsd: %(link_os_default) }}}}}}}}"
1011
1012 #define LINK_OS_DEFAULT_SPEC ""
1013
1014 #define CPP_SYSV_SPEC \
1015 "%{mrelocatable*: -D_RELOCATABLE} \
1016 %{fpic: -D__PIC__=1 -D__pic__=1} \
1017 %{!fpic: %{fPIC: -D__PIC__=2 -D__pic__=2}} \
1018 %{mlong-double-128: -D__LONG_DOUBLE_128__=1} \
1019 %{!mlong-double-64: %(cpp_longdouble_default)} \
1020 %{mcall-sysv: -D_CALL_SYSV} \
1021 %{mcall-aix: -D_CALL_AIX} %{mcall-aixdesc: -D_CALL_AIX -D_CALL_AIXDESC} \
1022 %{!mcall-sysv: %{!mcall-aix: %{!mcall-aixdesc: %(cpp_sysv_default) }}} \
1023 %{msoft-float: -D_SOFT_FLOAT} \
1024 %{!msoft-float: %{!mhard-float: \
1025     %{mcpu=401: -D_SOFT_FLOAT} \
1026     %{mcpu=403: -D_SOFT_FLOAT} \
1027     %{mcpu=405: -D_SOFT_FLOAT} \
1028     %{mcpu=ec603e: -D_SOFT_FLOAT} \
1029     %{mcpu=801: -D_SOFT_FLOAT} \
1030     %{mcpu=821: -D_SOFT_FLOAT} \
1031     %{mcpu=823: -D_SOFT_FLOAT} \
1032     %{mcpu=860: -D_SOFT_FLOAT} \
1033     %{!mcpu*: %(cpp_float_default) }}}"
1034
1035 /* Whether floating point is disabled by default.  */
1036 #define CPP_FLOAT_DEFAULT_SPEC ""
1037
1038 /* Whether 'long double' is 128 bits by default.  */
1039 #define CPP_LONGDOUBLE_DEFAULT_SPEC ""
1040
1041 #define CPP_SYSV_DEFAULT_SPEC "-D_CALL_SYSV"
1042
1043 #define CPP_ENDIAN_BIG_SPEC "-D_BIG_ENDIAN -D__BIG_ENDIAN__ -Amachine=bigendian"
1044
1045 #define CPP_ENDIAN_LITTLE_SPEC "-D_LITTLE_ENDIAN -D__LITTLE_ENDIAN__ -Amachine=littleendian"
1046
1047 #define CPP_ENDIAN_SPEC \
1048 "%{mlittle: %(cpp_endian_little) } \
1049 %{mlittle-endian: %(cpp_endian_little) } \
1050 %{mbig: %(cpp_endian_big) } \
1051 %{mbig-endian: %(cpp_endian_big) } \
1052 %{!mlittle: %{!mlittle-endian: %{!mbig: %{!mbig-endian: \
1053     %{mcall-freebsd: %(cpp_endian_big) } \
1054     %{mcall-linux: %(cpp_endian_big) } \
1055     %{mcall-gnu: %(cpp_endian_big) } \
1056     %{mcall-netbsd: %(cpp_endian_big) } \
1057     %{mcall-i960-old: %(cpp_endian_little) } \
1058     %{mcall-aixdesc:  %(cpp_endian_big) } \
1059     %{!mcall-linux: %{!mcall-gnu: %{!mcall-freebsd: %{!mcall-netbsd: %{!mcall-aixdesc: %(cpp_endian_default) }}}}}}}}}"
1060
1061 #define CPP_ENDIAN_DEFAULT_SPEC "%(cpp_endian_big)"
1062
1063 /* Override rs6000.h definition.  */
1064 #undef  CPP_SPEC
1065 #define CPP_SPEC "%{posix: -D_POSIX_SOURCE} %(cpp_sysv) %(cpp_endian) %(cpp_cpu) \
1066 %{mads: %(cpp_os_ads) } \
1067 %{myellowknife: %(cpp_os_yellowknife) } \
1068 %{mmvme: %(cpp_os_mvme) } \
1069 %{msim: %(cpp_os_sim) } \
1070 %{mcall-freebsd: %(cpp_os_freebsd) } \
1071 %{mcall-linux: %(cpp_os_linux) } \
1072 %{mcall-gnu: %(cpp_os_gnu) } \
1073 %{mcall-netbsd: %(cpp_os_netbsd) } \
1074 %{!mads: %{!myellowknife: %{!mmvme: %{!msim: %{!mcall-freebsd: %{!mcall-linux: %{!mcall-gnu: %{!mcall-netbsd: %(cpp_os_default) }}}}}}}}"
1075
1076 #define CPP_OS_DEFAULT_SPEC ""
1077
1078 /* Override svr4.h definition.  */
1079 #undef  STARTFILE_SPEC
1080 #define STARTFILE_SPEC "\
1081 %{mads: %(startfile_ads) } \
1082 %{myellowknife: %(startfile_yellowknife) } \
1083 %{mmvme: %(startfile_mvme) } \
1084 %{msim: %(startfile_sim) } \
1085 %{mcall-freebsd: %(startfile_freebsd) } \
1086 %{mcall-linux: %(startfile_linux) } \
1087 %{mcall-gnu: %(startfile_gnu) } \
1088 %{mcall-netbsd: %(startfile_netbsd) } \
1089 %{!mads: %{!myellowknife: %{!mmvme: %{!msim: %{!mcall-freebsd: %{!mcall-linux: %{!mcall-gnu: %{!mcall-netbsd: %(startfile_default) }}}}}}}}"
1090
1091 #define STARTFILE_DEFAULT_SPEC ""
1092
1093 /* Override svr4.h definition.  */
1094 #undef  LIB_SPEC
1095 #define LIB_SPEC "\
1096 %{mads: %(lib_ads) } \
1097 %{myellowknife: %(lib_yellowknife) } \
1098 %{mmvme: %(lib_mvme) } \
1099 %{msim: %(lib_sim) } \
1100 %{mcall-freebsd: %(lib_freebsd) } \
1101 %{mcall-linux: %(lib_linux) } \
1102 %{mcall-gnu: %(lib_gnu) } \
1103 %{mcall-netbsd: %(lib_netbsd) } \
1104 %{!mads: %{!myellowknife: %{!mmvme: %{!msim: %{!mcall-freebsd: %{!mcall-linux: %{!mcall-gnu: %{!mcall-netbsd: %(lib_default) }}}}}}}}"
1105
1106 #define LIB_DEFAULT_SPEC ""
1107
1108 /* Override svr4.h definition.  */
1109 #undef  ENDFILE_SPEC
1110 #define ENDFILE_SPEC "\
1111 %{mads: %(endfile_ads)} \
1112 %{myellowknife: %(endfile_yellowknife)} \
1113 %{mmvme: %(endfile_mvme)} \
1114 %{msim: %(endfile_sim)} \
1115 %{mcall-freebsd: %(endfile_freebsd) } \
1116 %{mcall-linux: %(endfile_linux) } \
1117 %{mcall-gnu: %(endfile_gnu) } \
1118 %{mcall-netbsd: %(endfile_netbsd) } \
1119 %{mvxworks: %(endfile_vxworks) } \
1120 %{!mads: %{!myellowknife: %{!mmvme: %{!msim: %{!mcall-freebsd: %{!mcall-linux: %{!mcall-gnu: %{!mcall-netbsd: %{!mvxworks: %(endfile_default) }}}}}}}}}"
1121
1122 #define ENDFILE_DEFAULT_SPEC ""
1123
1124 /* Motorola ADS support.  */
1125 #define LIB_ADS_SPEC "--start-group -lads -lc --end-group"
1126
1127 #define STARTFILE_ADS_SPEC "ecrti.o%s crt0.o%s crtbegin.o%s"
1128
1129 #define ENDFILE_ADS_SPEC "crtend.o%s ecrtn.o%s"
1130
1131 #define LINK_START_ADS_SPEC "-T ads.ld%s"
1132
1133 #define LINK_OS_ADS_SPEC ""
1134
1135 #define CPP_OS_ADS_SPEC ""
1136
1137 /* Motorola Yellowknife support.  */
1138 #define LIB_YELLOWKNIFE_SPEC "--start-group -lyk -lc --end-group"
1139
1140 #define STARTFILE_YELLOWKNIFE_SPEC "ecrti.o%s crt0.o%s crtbegin.o%s"
1141
1142 #define ENDFILE_YELLOWKNIFE_SPEC "crtend.o%s ecrtn.o%s"
1143
1144 #define LINK_START_YELLOWKNIFE_SPEC "-T yellowknife.ld%s"
1145
1146 #define LINK_OS_YELLOWKNIFE_SPEC ""
1147
1148 #define CPP_OS_YELLOWKNIFE_SPEC ""
1149
1150 /* Motorola MVME support.  */
1151 #define LIB_MVME_SPEC "--start-group -lmvme -lc --end-group"
1152
1153 #define STARTFILE_MVME_SPEC "ecrti.o%s crt0.o%s crtbegin.o%s"
1154
1155 #define ENDFILE_MVME_SPEC "crtend.o%s ecrtn.o%s"
1156
1157 #define LINK_START_MVME_SPEC "-Ttext 0x40000"
1158
1159 #define LINK_OS_MVME_SPEC ""
1160
1161 #define CPP_OS_MVME_SPEC ""
1162
1163 /* PowerPC simulator based on netbsd system calls support.  */
1164 #define LIB_SIM_SPEC "--start-group -lsim -lc --end-group"
1165
1166 #define STARTFILE_SIM_SPEC "ecrti.o%s sim-crt0.o%s crtbegin.o%s"
1167
1168 #define ENDFILE_SIM_SPEC "crtend.o%s ecrtn.o%s"
1169
1170 #define LINK_START_SIM_SPEC ""
1171
1172 #define LINK_OS_SIM_SPEC "-m elf32ppcsim"
1173
1174 #define CPP_OS_SIM_SPEC ""
1175
1176 /* FreeBSD support.  */
1177
1178 #define CPP_OS_FREEBSD_SPEC     "\
1179   -D__PPC__ -D__ppc__ -D__PowerPC__ -D__powerpc__ \
1180   -Acpu=powerpc -Amachine=powerpc"
1181
1182 #define STARTFILE_FREEBSD_SPEC  FBSD_STARTFILE_SPEC
1183 #define ENDFILE_FREEBSD_SPEC    FBSD_ENDFILE_SPEC
1184 #define LIB_FREEBSD_SPEC        FBSD_LIB_SPEC
1185 #define LINK_START_FREEBSD_SPEC ""
1186
1187 #define LINK_OS_FREEBSD_SPEC "\
1188   %{symbolic:-Bsymbolic}"
1189
1190 /* GNU/Linux support.  */
1191 #ifdef USE_GNULIBC_1
1192 #define LIB_LINUX_SPEC "%{mnewlib: --start-group -llinux -lc --end-group } \
1193 %{!mnewlib: -lc }"
1194 #else
1195 #define LIB_LINUX_SPEC "%{mnewlib: --start-group -llinux -lc --end-group } \
1196 %{!mnewlib: %{shared:-lc} %{!shared: %{pthread:-lpthread } \
1197 %{profile:-lc_p} %{!profile:-lc}}}"
1198 #endif
1199
1200 #ifdef USE_GNULIBC_1
1201 #define STARTFILE_LINUX_SPEC "\
1202 %{!shared: %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}} \
1203 %{mnewlib: ecrti.o%s} %{!mnewlib: crti.o%s} \
1204 %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
1205 #else
1206 #define STARTFILE_LINUX_SPEC "\
1207 %{!shared: %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}} \
1208 %{mnewlib: ecrti.o%s} %{!mnewlib: crti.o%s} \
1209 %{static:crtbeginT.o%s} \
1210 %{!static:%{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}}"
1211 #endif
1212
1213 #define ENDFILE_LINUX_SPEC "%{!shared:crtend.o%s} %{shared:crtendS.o%s} \
1214 %{mnewlib: ecrtn.o%s} %{!mnewlib: crtn.o%s}"
1215
1216 #define LINK_START_LINUX_SPEC ""
1217
1218 #define LINK_OS_LINUX_SPEC "-m elf32ppclinux %{!shared: %{!static: \
1219   %{rdynamic:-export-dynamic} \
1220   %{!dynamic-linker:-dynamic-linker /lib/ld.so.1}}}"
1221
1222 #if !defined(USE_GNULIBC_1) && defined(HAVE_LD_EH_FRAME_HDR)
1223 # define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
1224 #endif
1225
1226 #ifdef USE_GNULIBC_1
1227 #define CPP_OS_LINUX_SPEC "-D__unix__ -D__linux__               \
1228 %{!undef:                                                       \
1229   %{!ansi:                                                      \
1230     %{!std=*:-Dunix -D__unix -Dlinux -D__linux}                 \
1231     %{std=gnu*:-Dunix -D__unix -Dlinux -D__linux}}}             \
1232 -Asystem=unix -Asystem=posix"
1233 #else
1234 #define CPP_OS_LINUX_SPEC "-D__unix__ -D__linux__               \
1235 %{!undef:                                                       \
1236   %{!ansi:                                                      \
1237     %{!std=*:-Dunix -D__unix -Dlinux -D__linux}                 \
1238     %{std=gnu*:-Dunix -D__unix -Dlinux -D__linux}}}             \
1239 -Asystem=unix -Asystem=posix %{pthread:-D_REENTRANT}"
1240 #endif
1241
1242 /* GNU/Hurd support.  */
1243 #define LIB_GNU_SPEC "%{mnewlib: --start-group -lgnu -lc --end-group } \
1244 %{!mnewlib: %{shared:-lc} %{!shared: %{pthread:-lpthread } \
1245 %{profile:-lc_p} %{!profile:-lc}}}"
1246
1247 #define STARTFILE_GNU_SPEC "\
1248 %{!shared: %{!static: %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}} \
1249 %{static: %{pg:gcrt0.o%s} %{!pg:%{p:gcrt0.o%s} %{!p:crt0.o%s}}} \
1250 %{mnewlib: ecrti.o%s} %{!mnewlib: crti.o%s} \
1251 %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
1252
1253 #define ENDFILE_GNU_SPEC "%{!shared:crtend.o%s} %{shared:crtendS.o%s} \
1254 %{mnewlib: ecrtn.o%s} %{!mnewlib: crtn.o%s}"
1255
1256 #define LINK_START_GNU_SPEC ""
1257
1258 #define LINK_OS_GNU_SPEC "-m elf32ppclinux %{!shared: %{!static: \
1259   %{rdynamic:-export-dynamic} \
1260   %{!dynamic-linker:-dynamic-linker /lib/ld.so.1}}}"
1261
1262 #define CPP_OS_GNU_SPEC "-D__unix__ -D__GNU__   \
1263 %{!undef:                                       \
1264   %{!ansi: -Dunix -D__unix}}                    \
1265 -Asystem=gnu -Asystem=unix -Asystem=posix %{pthread:-D_REENTRANT}"
1266
1267 /* NetBSD support.  */
1268 #define LIB_NETBSD_SPEC "\
1269 %{profile:-lgmon -lc_p} %{!profile:-lc}"
1270
1271 #define STARTFILE_NETBSD_SPEC "\
1272 ncrti.o%s crt0.o%s \
1273 %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
1274
1275 #define ENDFILE_NETBSD_SPEC "\
1276 %{!shared:crtend.o%s} %{shared:crtendS.o%s} \
1277 ncrtn.o%s"
1278
1279 #define LINK_START_NETBSD_SPEC "\
1280 "
1281
1282 #define LINK_OS_NETBSD_SPEC "\
1283 %{!shared: %{!static: \
1284   %{rdynamic:-export-dynamic} \
1285   %{!dynamic-linker:-dynamic-linker /usr/libexec/ld.elf_so}}}"
1286
1287 #define CPP_OS_NETBSD_SPEC "\
1288 -D__powerpc__ -D__NetBSD__ -D__ELF__ -D__KPRINTF_ATTRIBUTE__"
1289
1290 /* VxWorks support.  */
1291 /* VxWorks does all the library stuff itself.  */
1292 #define LIB_VXWORKS_SPEC ""
1293
1294 /* VxWorks provides the functionality of crt0.o and friends itself.  */
1295
1296 #define STARTFILE_VXWORKS_SPEC ""
1297
1298 #define ENDFILE_VXWORKS_SPEC ""
1299
1300 /* Because it uses ld -r, vxworks has no start/end files, nor starting
1301    address.  */
1302
1303 #define LINK_START_VXWORKS_SPEC ""
1304
1305 #define LINK_OS_VXWORKS_SPEC "-r"
1306
1307 #define CPP_OS_VXWORKS_SPEC "\
1308 -DCPU_FAMILY=PPC \
1309 %{!mcpu*: \
1310   %{mpowerpc*: -DCPU=PPC603} \
1311   %{!mno-powerpc: -DCPU=PPC603}} \
1312 %{mcpu=powerpc: -DCPU=PPC603} \
1313 %{mcpu=401: -DCPU=PPC403} \
1314 %{mcpu=403: -DCPU=PPC403} \
1315 %{mcpu=405: -DCPU=PPC405} \
1316 %{mcpu=601: -DCPU=PPC601} \
1317 %{mcpu=602: -DCPU=PPC603} \
1318 %{mcpu=603: -DCPU=PPC603} \
1319 %{mcpu=603e: -DCPU=PPC603} \
1320 %{mcpu=ec603e: -DCPU=PPC603} \
1321 %{mcpu=604: -DCPU=PPC604} \
1322 %{mcpu=604e: -DCPU=PPC604} \
1323 %{mcpu=620: -DCPU=PPC604} \
1324 %{mcpu=740: -DCPU=PPC603} \
1325 %{mcpu=7450: -DCPU=PPC603} \
1326 %{mcpu=750: -DCPU=PPC603} \
1327 %{mcpu=801: -DCPU=PPC603} \
1328 %{mcpu=821: -DCPU=PPC603} \
1329 %{mcpu=823: -DCPU=PPC603} \
1330 %{mcpu=860: -DCPU=PPC603}"
1331
1332 /* Define any extra SPECS that the compiler needs to generate.  */
1333 /* Override rs6000.h definition.  */
1334 #undef  SUBTARGET_EXTRA_SPECS
1335 #define SUBTARGET_EXTRA_SPECS                                           \
1336   { "cpp_sysv",                 CPP_SYSV_SPEC },                        \
1337   { "cpp_sysv_default",         CPP_SYSV_DEFAULT_SPEC },                \
1338   { "cpp_endian_default",       CPP_ENDIAN_DEFAULT_SPEC },              \
1339   { "cpp_endian",               CPP_ENDIAN_SPEC },                      \
1340   { "lib_ads",                  LIB_ADS_SPEC },                         \
1341   { "lib_yellowknife",          LIB_YELLOWKNIFE_SPEC },                 \
1342   { "lib_mvme",                 LIB_MVME_SPEC },                        \
1343   { "lib_sim",                  LIB_SIM_SPEC },                         \
1344   { "lib_freebsd",              LIB_FREEBSD_SPEC },                     \
1345   { "lib_gnu",                  LIB_GNU_SPEC },                         \
1346   { "lib_linux",                LIB_LINUX_SPEC },                       \
1347   { "lib_netbsd",               LIB_NETBSD_SPEC },                      \
1348   { "lib_vxworks",              LIB_VXWORKS_SPEC },                     \
1349   { "lib_default",              LIB_DEFAULT_SPEC },                     \
1350   { "startfile_ads",            STARTFILE_ADS_SPEC },                   \
1351   { "startfile_yellowknife",    STARTFILE_YELLOWKNIFE_SPEC },           \
1352   { "startfile_mvme",           STARTFILE_MVME_SPEC },                  \
1353   { "startfile_sim",            STARTFILE_SIM_SPEC },                   \
1354   { "startfile_freebsd",        STARTFILE_FREEBSD_SPEC },               \
1355   { "startfile_gnu",            STARTFILE_GNU_SPEC },                   \
1356   { "startfile_linux",          STARTFILE_LINUX_SPEC },                 \
1357   { "startfile_netbsd",         STARTFILE_NETBSD_SPEC },                \
1358   { "startfile_vxworks",        STARTFILE_VXWORKS_SPEC },               \
1359   { "startfile_default",        STARTFILE_DEFAULT_SPEC },               \
1360   { "endfile_ads",              ENDFILE_ADS_SPEC },                     \
1361   { "endfile_yellowknife",      ENDFILE_YELLOWKNIFE_SPEC },             \
1362   { "endfile_mvme",             ENDFILE_MVME_SPEC },                    \
1363   { "endfile_sim",              ENDFILE_SIM_SPEC },                     \
1364   { "endfile_freebsd",          ENDFILE_FREEBSD_SPEC },                 \
1365   { "endfile_gnu",              ENDFILE_GNU_SPEC },                     \
1366   { "endfile_linux",            ENDFILE_LINUX_SPEC },                   \
1367   { "endfile_netbsd",           ENDFILE_NETBSD_SPEC },                  \
1368   { "endfile_vxworks",          ENDFILE_VXWORKS_SPEC },                 \
1369   { "endfile_default",          ENDFILE_DEFAULT_SPEC },                 \
1370   { "link_path",                LINK_PATH_SPEC },                       \
1371   { "link_shlib",               LINK_SHLIB_SPEC },                      \
1372   { "link_target",              LINK_TARGET_SPEC },                     \
1373   { "link_start",               LINK_START_SPEC },                      \
1374   { "link_start_ads",           LINK_START_ADS_SPEC },                  \
1375   { "link_start_yellowknife",   LINK_START_YELLOWKNIFE_SPEC },          \
1376   { "link_start_mvme",          LINK_START_MVME_SPEC },                 \
1377   { "link_start_sim",           LINK_START_SIM_SPEC },                  \
1378   { "link_start_freebsd",       LINK_START_FREEBSD_SPEC },              \
1379   { "link_start_gnu",           LINK_START_GNU_SPEC },                  \
1380   { "link_start_linux",         LINK_START_LINUX_SPEC },                \
1381   { "link_start_netbsd",        LINK_START_NETBSD_SPEC },               \
1382   { "link_start_vxworks",       LINK_START_VXWORKS_SPEC },              \
1383   { "link_start_default",       LINK_START_DEFAULT_SPEC },              \
1384   { "link_os",                  LINK_OS_SPEC },                         \
1385   { "link_os_ads",              LINK_OS_ADS_SPEC },                     \
1386   { "link_os_yellowknife",      LINK_OS_YELLOWKNIFE_SPEC },             \
1387   { "link_os_mvme",             LINK_OS_MVME_SPEC },                    \
1388   { "link_os_sim",              LINK_OS_SIM_SPEC },                     \
1389   { "link_os_freebsd",          LINK_OS_FREEBSD_SPEC },                 \
1390   { "link_os_linux",            LINK_OS_LINUX_SPEC },                   \
1391   { "link_os_gnu",              LINK_OS_GNU_SPEC },                     \
1392   { "link_os_netbsd",           LINK_OS_NETBSD_SPEC },                  \
1393   { "link_os_vxworks",          LINK_OS_VXWORKS_SPEC },                 \
1394   { "link_os_default",          LINK_OS_DEFAULT_SPEC },                 \
1395   { "cc1_endian_big",           CC1_ENDIAN_BIG_SPEC },                  \
1396   { "cc1_endian_little",        CC1_ENDIAN_LITTLE_SPEC },               \
1397   { "cc1_endian_default",       CC1_ENDIAN_DEFAULT_SPEC },              \
1398   { "cpp_endian_big",           CPP_ENDIAN_BIG_SPEC },                  \
1399   { "cpp_endian_little",        CPP_ENDIAN_LITTLE_SPEC },               \
1400   { "cpp_float_default",        CPP_FLOAT_DEFAULT_SPEC },               \
1401   { "cpp_longdouble_default",   CPP_LONGDOUBLE_DEFAULT_SPEC },          \
1402   { "cpp_os_ads",               CPP_OS_ADS_SPEC },                      \
1403   { "cpp_os_yellowknife",       CPP_OS_YELLOWKNIFE_SPEC },              \
1404   { "cpp_os_mvme",              CPP_OS_MVME_SPEC },                     \
1405   { "cpp_os_sim",               CPP_OS_SIM_SPEC },                      \
1406   { "cpp_os_freebsd",           CPP_OS_FREEBSD_SPEC },                  \
1407   { "cpp_os_gnu",               CPP_OS_GNU_SPEC },                      \
1408   { "cpp_os_linux",             CPP_OS_LINUX_SPEC },                    \
1409   { "cpp_os_netbsd",            CPP_OS_NETBSD_SPEC },                   \
1410   { "cpp_os_vxworks",           CPP_OS_VXWORKS_SPEC },                  \
1411   { "cpp_os_default",           CPP_OS_DEFAULT_SPEC },
1412
1413 /* Define this macro as a C expression for the initializer of an
1414    array of string to tell the driver program which options are
1415    defaults for this target and thus do not need to be handled
1416    specially when using `MULTILIB_OPTIONS'.
1417
1418    Do not define this macro if `MULTILIB_OPTIONS' is not defined in
1419    the target makefile fragment or if none of the options listed in
1420    `MULTILIB_OPTIONS' are set by default.  *Note Target Fragment::.  */
1421
1422 #define MULTILIB_DEFAULTS { "mbig", "mcall-sysv" }
1423
1424 /* Define this macro if the code for function profiling should come
1425    before the function prologue.  Normally, the profiling code comes
1426    after.  */
1427 #define PROFILE_BEFORE_PROLOGUE 1
1428
1429 /* Function name to call to do profiling.  */
1430 #define RS6000_MCOUNT "_mcount"
1431
1432 /* Define this macro (to a value of 1) if you want to support the
1433    Win32 style pragmas #pragma pack(push,<n>)' and #pragma
1434    pack(pop)'.  The pack(push,<n>) pragma specifies the maximum
1435    alignment (in bytes) of fields within a structure, in much the
1436    same way as the __aligned__' and __packed__' __attribute__'s
1437    do.  A pack value of zero resets the behaviour to the default.
1438    Successive invocations of this pragma cause the previous values to
1439    be stacked, so that invocations of #pragma pack(pop)' will return
1440    to the previous value.  */
1441
1442 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
1443
1444 /* Define library calls for quad FP operations.  These are all part of the
1445    PowerPC 32bit ABI.  */
1446 #define ADDTF3_LIBCALL "_q_add"
1447 #define DIVTF3_LIBCALL "_q_div"
1448 #define EXTENDDFTF2_LIBCALL "_q_dtoq"
1449 #define EQTF2_LIBCALL "_q_feq"
1450 #define GETF2_LIBCALL "_q_fge"
1451 #define GTTF2_LIBCALL "_q_fgt"
1452 #define LETF2_LIBCALL "_q_fle"
1453 #define LTTF2_LIBCALL "_q_flt"
1454 #define NETF2_LIBCALL "_q_fne"
1455 #define FLOATSITF2_LIBCALL "_q_itoq"
1456 #define MULTF3_LIBCALL "_q_mul"
1457 #define NEGTF2_LIBCALL "_q_neg"
1458 #define TRUNCTFDF2_LIBCALL "_q_qtod"
1459 #define FIX_TRUNCTFSI2_LIBCALL "_q_qtoi"
1460 #define TRUNCTFSF2_LIBCALL "_q_qtos"
1461 #define FIXUNS_TRUNCTFSI2_LIBCALL "_q_qtou"
1462 #define SQRTTF_LIBCALL "_q_sqrt"
1463 #define EXTENDSFTF2_LIBCALL "_q_stoq"
1464 #define SUBTF3_LIBCALL "_q_sub"
1465 #define FLOATUNSSITF2_LIBCALL "_q_utoq"
1466
1467 #define INIT_TARGET_OPTABS                                              \
1468   do {                                                                  \
1469     if (TARGET_HARD_FLOAT)                                              \
1470       {                                                                 \
1471         add_optab->handlers[(int) TFmode].libfunc                       \
1472           = init_one_libfunc (ADDTF3_LIBCALL);                          \
1473         sub_optab->handlers[(int) TFmode].libfunc                       \
1474           = init_one_libfunc (SUBTF3_LIBCALL);                          \
1475         neg_optab->handlers[(int) TFmode].libfunc                       \
1476           = init_one_libfunc (NEGTF2_LIBCALL);                          \
1477         smul_optab->handlers[(int) TFmode].libfunc                      \
1478           = init_one_libfunc (MULTF3_LIBCALL);                          \
1479         sdiv_optab->handlers[(int) TFmode].libfunc                      \
1480           = init_one_libfunc (DIVTF3_LIBCALL);                          \
1481         eqtf2_libfunc = init_one_libfunc (EQTF2_LIBCALL);               \
1482         netf2_libfunc = init_one_libfunc (NETF2_LIBCALL);               \
1483         gttf2_libfunc = init_one_libfunc (GTTF2_LIBCALL);               \
1484         getf2_libfunc = init_one_libfunc (GETF2_LIBCALL);               \
1485         lttf2_libfunc = init_one_libfunc (LTTF2_LIBCALL);               \
1486         letf2_libfunc = init_one_libfunc (LETF2_LIBCALL);               \
1487         trunctfsf2_libfunc = init_one_libfunc (TRUNCTFSF2_LIBCALL);     \
1488         trunctfdf2_libfunc = init_one_libfunc (TRUNCTFDF2_LIBCALL);     \
1489         extendsftf2_libfunc = init_one_libfunc (EXTENDSFTF2_LIBCALL);   \
1490         extenddftf2_libfunc = init_one_libfunc (EXTENDDFTF2_LIBCALL);   \
1491         floatsitf_libfunc = init_one_libfunc (FLOATSITF2_LIBCALL);      \
1492         fixtfsi_libfunc = init_one_libfunc (FIX_TRUNCTFSI2_LIBCALL);    \
1493         fixunstfsi_libfunc                                              \
1494           = init_one_libfunc (FIXUNS_TRUNCTFSI2_LIBCALL);               \
1495         if (TARGET_PPC_GPOPT || TARGET_POWER2)                          \
1496           sqrt_optab->handlers[(int) TFmode].libfunc                    \
1497             = init_one_libfunc (SQRTTF_LIBCALL);                        \
1498       }                                                                 \
1499   } while (0)
1500
1501 /* Select a format to encode pointers in exception handling data.  CODE
1502    is 0 for data, 1 for code labels, 2 for function pointers.  GLOBAL is
1503    true if the symbol may be affected by dynamic relocations.  */
1504 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)                            \
1505   ((flag_pic || TARGET_RELOCATABLE)                                          \
1506    ? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel | DW_EH_PE_sdata4) \
1507    : DW_EH_PE_absptr)
1508
1509 #define TARGET_ASM_EXCEPTION_SECTION readonly_data_section
1510
1511 #define DOUBLE_INT_ASM_OP "\t.quad\t"
1512
1513 /* Generate entries in .fixup for relocatable addresses.  */
1514 #define RELOCATABLE_NEEDS_FIXUP