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[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, 2002, 2003,
3    2004, 2005 Free Software Foundation, Inc.
4    Contributed by Cygnus Support.
5
6    This file is part of GCC.
7
8    GCC is free software; you can redistribute it and/or modify it
9    under the terms of the GNU General Public License as published
10    by the Free Software Foundation; either version 2, or (at your
11    option) any later version.
12
13    GCC is distributed in the hope that it will be useful, but WITHOUT
14    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
16    License for more details.
17
18    You should have received a copy of the GNU General Public License
19    along with GCC; see the file COPYING.  If not, write to the
20    Free Software Foundation, 59 Temple Place - Suite 330, Boston,
21    MA 02111-1307, USA.  */
22
23 /* Header files should be C++ aware in general.  */
24 #define NO_IMPLICIT_EXTERN_C
25
26 /* Yes!  We are ELF.  */
27 #define TARGET_OBJECT_FORMAT OBJECT_ELF
28
29 /* Default ABI to compile code for.  */
30 #define DEFAULT_ABI rs6000_current_abi
31
32 /* Default ABI to use.  */
33 #define RS6000_ABI_NAME "sysv"
34
35 /* Override rs6000.h definition.  */
36 #undef  ASM_DEFAULT_SPEC
37 #define ASM_DEFAULT_SPEC "-mppc"
38
39 /* Small data support types.  */
40 enum rs6000_sdata_type {
41   SDATA_NONE,                   /* No small data support.  */
42   SDATA_DATA,                   /* Just put data in .sbss/.sdata, don't use relocs.  */
43   SDATA_SYSV,                   /* Use r13 to point to .sdata/.sbss.  */
44   SDATA_EABI                    /* Use r13 like above, r2 points to .sdata2/.sbss2.  */
45 };
46
47 extern enum rs6000_sdata_type rs6000_sdata;
48
49 /* V.4/eabi switches.  */
50 #define MASK_NO_BITFIELD_TYPE   0x40000000      /* Set PCC_BITFIELD_TYPE_MATTERS to 0.  */
51 #define MASK_STRICT_ALIGN       0x20000000      /* Set STRICT_ALIGNMENT to 1.  */
52 #define MASK_RELOCATABLE        0x10000000      /* GOT pointers are PC relative.  */
53 #define MASK_EABI               0x08000000      /* Adhere to eabi, not System V spec.  */
54 #define MASK_LITTLE_ENDIAN      0x04000000      /* Target is little endian.  */
55 #define MASK_REGNAMES           0x02000000      /* Use alternate register names.  */
56 #define MASK_PROTOTYPE          0x01000000      /* Only prototyped fcns pass variable args.  */
57 #define MASK_NO_BITFIELD_WORD   0x00800000      /* Bitfields cannot cross word boundaries */
58
59 #define TARGET_NO_BITFIELD_TYPE (target_flags & MASK_NO_BITFIELD_TYPE)
60 #define TARGET_STRICT_ALIGN     (target_flags & MASK_STRICT_ALIGN)
61 #define TARGET_RELOCATABLE      (target_flags & MASK_RELOCATABLE)
62 #define TARGET_EABI             (target_flags & MASK_EABI)
63 #define TARGET_LITTLE_ENDIAN    (target_flags & MASK_LITTLE_ENDIAN)
64 #define TARGET_REGNAMES         (target_flags & MASK_REGNAMES)
65 #define TARGET_PROTOTYPE        (target_flags & MASK_PROTOTYPE)
66 #define TARGET_NO_BITFIELD_WORD (target_flags & MASK_NO_BITFIELD_WORD)
67 #define TARGET_TOC              ((target_flags & MASK_64BIT)            \
68                                  || ((target_flags & (MASK_RELOCATABLE  \
69                                                       | MASK_MINIMAL_TOC)) \
70                                      && flag_pic > 1)                   \
71                                  || DEFAULT_ABI == ABI_AIX)
72
73 #define TARGET_BITFIELD_TYPE    (! TARGET_NO_BITFIELD_TYPE)
74 #define TARGET_BIG_ENDIAN       (! TARGET_LITTLE_ENDIAN)
75 #define TARGET_NO_PROTOTYPE     (! TARGET_PROTOTYPE)
76 #define TARGET_NO_TOC           (! TARGET_TOC)
77 #define TARGET_NO_EABI          (! TARGET_EABI)
78
79 /* Strings provided by SUBTARGET_OPTIONS */
80 extern const char *rs6000_abi_name;
81 extern const char *rs6000_sdata_name;
82 extern const char *rs6000_tls_size_string; /* For -mtls-size= */
83
84 /* Override rs6000.h definition.  */
85 #undef  SUBTARGET_OPTIONS
86 #define SUBTARGET_OPTIONS                                                       \
87   { "call-",  &rs6000_abi_name, N_("Select ABI calling convention"), 0},        \
88   { "sdata=", &rs6000_sdata_name, N_("Select method for sdata handling"), 0},   \
89   { "tls-size=", &rs6000_tls_size_string,                                       \
90    N_("Specify bit size of immediate TLS offsets"), 0 }
91
92 #define SDATA_DEFAULT_SIZE 8
93
94 /* Note, V.4 no longer uses a normal TOC, so make -mfull-toc, be just
95    the same as -mminimal-toc.  */
96 /* Override rs6000.h definition.  */
97 #undef  SUBTARGET_SWITCHES
98 #define SUBTARGET_SWITCHES                                              \
99   { "bit-align",        -MASK_NO_BITFIELD_TYPE,                         \
100     N_("Align to the base type of the bit-field") },                    \
101   { "no-bit-align",      MASK_NO_BITFIELD_TYPE,                         \
102     N_("Don't align to the base type of the bit-field") },              \
103   { "strict-align",      MASK_STRICT_ALIGN,                             \
104     N_("Don't assume that unaligned accesses are handled by the system") }, \
105   { "no-strict-align",  -MASK_STRICT_ALIGN,                             \
106     N_("Assume that unaligned accesses are handled by the system") },   \
107   { "relocatable",       MASK_RELOCATABLE | MASK_MINIMAL_TOC | MASK_NO_FP_IN_TOC, \
108     N_("Produce code relocatable at runtime") },                        \
109   { "no-relocatable",   -MASK_RELOCATABLE,                              \
110     N_("Don't produce code relocatable at runtime") },                  \
111   { "relocatable-lib",   MASK_RELOCATABLE | MASK_MINIMAL_TOC | MASK_NO_FP_IN_TOC, \
112     N_("Produce code relocatable at runtime") },                        \
113   { "no-relocatable-lib", -MASK_RELOCATABLE,                            \
114     N_("Don't produce code relocatable at runtime") },                  \
115   { "little-endian",     MASK_LITTLE_ENDIAN,                            \
116     N_("Produce little endian code") },                                 \
117   { "little",            MASK_LITTLE_ENDIAN,                            \
118     N_("Produce little endian code") },                                 \
119   { "big-endian",       -MASK_LITTLE_ENDIAN,                            \
120     N_("Produce big endian code") },                                    \
121   { "big",              -MASK_LITTLE_ENDIAN,                            \
122     N_("Produce big endian code") },                                    \
123   { "no-toc",            0, N_("no description yet") },                 \
124   { "toc",               MASK_MINIMAL_TOC, N_("no description yet") },  \
125   { "full-toc",          MASK_MINIMAL_TOC, N_("no description yet") },  \
126   { "prototype",         MASK_PROTOTYPE, N_("no description yet") },    \
127   { "no-prototype",     -MASK_PROTOTYPE, N_("no description yet") },    \
128   { "no-traceback",      0, N_("no description yet") },                 \
129   { "eabi",              MASK_EABI, N_("Use EABI") },                   \
130   { "no-eabi",          -MASK_EABI, N_("Don't use EABI") },             \
131   { "bit-word",         -MASK_NO_BITFIELD_WORD, "" },                   \
132   { "no-bit-word",       MASK_NO_BITFIELD_WORD,                         \
133     N_("Do not allow bit-fields to cross word boundaries") },           \
134   { "regnames",           MASK_REGNAMES,                                \
135     N_("Use alternate register names") },                               \
136   { "no-regnames",       -MASK_REGNAMES,                                \
137     N_("Don't use alternate register names") },                         \
138   { "sdata",             0, N_("no description yet") },                 \
139   { "no-sdata",          0, N_("no description yet") },                 \
140   { "sim",               0,                                             \
141     N_("Link with libsim.a, libc.a and sim-crt0.o") },                  \
142   { "ads",               0,                                             \
143     N_("Link with libads.a, libc.a and crt0.o") },                      \
144   { "yellowknife",       0,                                             \
145     N_("Link with libyk.a, libc.a and crt0.o") },                       \
146   { "mvme",              0,                                             \
147     N_("Link with libmvme.a, libc.a and crt0.o") },                     \
148   { "emb",               0,                                             \
149     N_("Set the PPC_EMB bit in the ELF flags header") },                \
150   { "windiss",           0, N_("Use the WindISS simulator") },          \
151   { "shlib",             0, N_("no description yet") },                 \
152   { "64",                MASK_64BIT | MASK_POWERPC64 | MASK_POWERPC,    \
153                          N_("Generate 64-bit code") },                  \
154   { "32",                - (MASK_64BIT | MASK_POWERPC64),               \
155                          N_("Generate 32-bit code") },                  \
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 (rs6000_abi_name == NULL)                                          \
177     rs6000_abi_name = RS6000_ABI_NAME;                                  \
178                                                                         \
179   if (!strcmp (rs6000_abi_name, "sysv"))                                \
180     rs6000_current_abi = ABI_V4;                                        \
181   else if (!strcmp (rs6000_abi_name, "sysv-noeabi"))                    \
182     {                                                                   \
183       rs6000_current_abi = ABI_V4;                                      \
184       target_flags &= ~ MASK_EABI;                                      \
185     }                                                                   \
186   else if (!strcmp (rs6000_abi_name, "sysv-eabi")                       \
187            || !strcmp (rs6000_abi_name, "eabi"))                        \
188     {                                                                   \
189       rs6000_current_abi = ABI_V4;                                      \
190       target_flags |= MASK_EABI;                                        \
191     }                                                                   \
192   else if (!strcmp (rs6000_abi_name, "aixdesc"))                        \
193     rs6000_current_abi = ABI_AIX;                                       \
194   else if (!strcmp (rs6000_abi_name, "freebsd"))                        \
195     rs6000_current_abi = ABI_V4;                                        \
196   else if (!strcmp (rs6000_abi_name, "linux"))                          \
197     {                                                                   \
198       if (TARGET_64BIT)                                                 \
199         rs6000_current_abi = ABI_AIX;                                   \
200       else                                                              \
201         rs6000_current_abi = ABI_V4;                                    \
202     }                                                                   \
203   else if (!strcmp (rs6000_abi_name, "gnu"))                            \
204     rs6000_current_abi = ABI_V4;                                        \
205   else if (!strcmp (rs6000_abi_name, "netbsd"))                         \
206     rs6000_current_abi = ABI_V4;                                        \
207   else if (!strcmp (rs6000_abi_name, "openbsd"))                        \
208     rs6000_current_abi = ABI_V4;                                        \
209   else if (!strcmp (rs6000_abi_name, "i960-old"))                       \
210     {                                                                   \
211       rs6000_current_abi = ABI_V4;                                      \
212       target_flags |= (MASK_LITTLE_ENDIAN | MASK_EABI                   \
213                        | MASK_NO_BITFIELD_WORD);                        \
214       target_flags &= ~MASK_STRICT_ALIGN;                               \
215     }                                                                   \
216   else                                                                  \
217     {                                                                   \
218       rs6000_current_abi = ABI_V4;                                      \
219       error ("bad value for -mcall-%s", rs6000_abi_name);               \
220     }                                                                   \
221                                                                         \
222   if (rs6000_sdata_name)                                                \
223     {                                                                   \
224       if (!strcmp (rs6000_sdata_name, "none"))                          \
225         rs6000_sdata = SDATA_NONE;                                      \
226       else if (!strcmp (rs6000_sdata_name, "data"))                     \
227         rs6000_sdata = SDATA_DATA;                                      \
228       else if (!strcmp (rs6000_sdata_name, "default"))                  \
229         rs6000_sdata = (TARGET_EABI) ? SDATA_EABI : SDATA_SYSV;         \
230       else if (!strcmp (rs6000_sdata_name, "sysv"))                     \
231         rs6000_sdata = SDATA_SYSV;                                      \
232       else if (!strcmp (rs6000_sdata_name, "eabi"))                     \
233         rs6000_sdata = SDATA_EABI;                                      \
234       else                                                              \
235         error ("bad value for -msdata=%s", rs6000_sdata_name);          \
236     }                                                                   \
237   else if (DEFAULT_ABI == ABI_V4)                                       \
238     {                                                                   \
239       rs6000_sdata = SDATA_DATA;                                        \
240       rs6000_sdata_name = "data";                                       \
241     }                                                                   \
242   else                                                                  \
243     {                                                                   \
244       rs6000_sdata = SDATA_NONE;                                        \
245       rs6000_sdata_name = "none";                                       \
246     }                                                                   \
247                                                                         \
248   if (TARGET_RELOCATABLE &&                                             \
249       (rs6000_sdata == SDATA_EABI || rs6000_sdata == SDATA_SYSV))       \
250     {                                                                   \
251       rs6000_sdata = SDATA_DATA;                                        \
252       error ("-mrelocatable and -msdata=%s are incompatible",           \
253              rs6000_sdata_name);                                        \
254     }                                                                   \
255                                                                         \
256   else if (flag_pic && DEFAULT_ABI != ABI_AIX                           \
257            && (rs6000_sdata == SDATA_EABI                               \
258                || rs6000_sdata == SDATA_SYSV))                          \
259     {                                                                   \
260       rs6000_sdata = SDATA_DATA;                                        \
261       error ("-f%s and -msdata=%s are incompatible",                    \
262              (flag_pic > 1) ? "PIC" : "pic",                            \
263              rs6000_sdata_name);                                        \
264     }                                                                   \
265                                                                         \
266   if ((rs6000_sdata != SDATA_NONE && DEFAULT_ABI != ABI_V4)             \
267       || (rs6000_sdata == SDATA_EABI && !TARGET_EABI))                  \
268     {                                                                   \
269       rs6000_sdata = SDATA_NONE;                                        \
270       error ("-msdata=%s and -mcall-%s are incompatible",               \
271              rs6000_sdata_name, rs6000_abi_name);                       \
272     }                                                                   \
273                                                                         \
274   targetm.have_srodata_section = rs6000_sdata == SDATA_EABI;            \
275                                                                         \
276   if (TARGET_RELOCATABLE && !TARGET_MINIMAL_TOC)                        \
277     {                                                                   \
278       target_flags |= MASK_MINIMAL_TOC;                                 \
279       error ("-mrelocatable and -mno-minimal-toc are incompatible");    \
280     }                                                                   \
281                                                                         \
282   if (TARGET_RELOCATABLE && rs6000_current_abi == ABI_AIX)              \
283     {                                                                   \
284       target_flags &= ~MASK_RELOCATABLE;                                \
285       error ("-mrelocatable and -mcall-%s are incompatible",            \
286              rs6000_abi_name);                                          \
287     }                                                                   \
288                                                                         \
289   if (!TARGET_64BIT && flag_pic > 1 && rs6000_current_abi == ABI_AIX)   \
290     {                                                                   \
291       flag_pic = 0;                                                     \
292       error ("-fPIC and -mcall-%s are incompatible",                    \
293              rs6000_abi_name);                                          \
294     }                                                                   \
295                                                                         \
296   if (rs6000_current_abi == ABI_AIX && TARGET_LITTLE_ENDIAN)            \
297     {                                                                   \
298       target_flags &= ~MASK_LITTLE_ENDIAN;                              \
299       error ("-mcall-aixdesc must be big endian");                      \
300     }                                                                   \
301                                                                         \
302   /* Treat -fPIC the same as -mrelocatable.  */                         \
303   if (flag_pic > 1 && DEFAULT_ABI != ABI_AIX)                           \
304     target_flags |= MASK_RELOCATABLE | MASK_MINIMAL_TOC | MASK_NO_FP_IN_TOC; \
305                                                                         \
306   else if (TARGET_RELOCATABLE)                                          \
307     flag_pic = 2;                                                       \
308 } while (0)
309
310 #ifndef RS6000_BI_ARCH
311 # define SUBSUBTARGET_OVERRIDE_OPTIONS                                  \
312 do {                                                                    \
313   if ((TARGET_DEFAULT ^ target_flags) & MASK_64BIT)                     \
314     error ("-m%s not supported in this configuration",                  \
315            (target_flags & MASK_64BIT) ? "64" : "32");                  \
316 } while (0)
317 #endif
318
319 /* Override rs6000.h definition.  */
320 #undef  TARGET_DEFAULT
321 #define TARGET_DEFAULT (MASK_POWERPC | MASK_NEW_MNEMONICS)
322
323 /* Override rs6000.h definition.  */
324 #undef  PROCESSOR_DEFAULT
325 #define PROCESSOR_DEFAULT PROCESSOR_PPC750
326
327 /* SVR4 only defined for PowerPC, so short-circuit POWER patterns.  */
328 #undef  TARGET_POWER
329 #define TARGET_POWER 0
330
331 #define FIXED_R2 1
332 /* System V.4 uses register 13 as a pointer to the small data area,
333    so it is not available to the normal user.  */
334 #define FIXED_R13 1
335
336 /* Size of the V.4 varargs area if needed.  */
337 /* Override rs6000.h definition.  */
338 #undef  RS6000_VARARGS_AREA
339 #define RS6000_VARARGS_AREA (current_function_stdarg ? RS6000_VARARGS_SIZE : 0)
340
341 /* Override default big endianism definitions in rs6000.h.  */
342 #undef  BYTES_BIG_ENDIAN
343 #undef  WORDS_BIG_ENDIAN
344 #define BYTES_BIG_ENDIAN (TARGET_BIG_ENDIAN)
345 #define WORDS_BIG_ENDIAN (TARGET_BIG_ENDIAN)
346
347 /* Define this to set the endianness to use in libgcc2.c, which can
348    not depend on target_flags.  */
349 #if !defined(__LITTLE_ENDIAN__) && !defined(__sun__)
350 #define LIBGCC2_WORDS_BIG_ENDIAN 1
351 #else
352 #define LIBGCC2_WORDS_BIG_ENDIAN 0
353 #endif
354
355 /* Define cutoff for using external functions to save floating point.
356    Currently on V.4, always use inline stores.  */
357 #define FP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) < 64)
358
359 /* Put jump tables in read-only memory, rather than in .text.  */
360 #define JUMP_TABLES_IN_TEXT_SECTION 0
361
362 /* Prefix and suffix to use to saving floating point.  */
363 #define SAVE_FP_PREFIX "_savefpr_"
364 #define SAVE_FP_SUFFIX "_l"
365
366 /* Prefix and suffix to use to restoring floating point.  */
367 #define RESTORE_FP_PREFIX "_restfpr_"
368 #define RESTORE_FP_SUFFIX "_l"
369
370 /* Type used for ptrdiff_t, as a string used in a declaration.  */
371 #define PTRDIFF_TYPE "int"
372
373 /* Type used for wchar_t, as a string used in a declaration.  */
374 /* Override svr4.h definition.  */
375 #undef  WCHAR_TYPE
376 #define WCHAR_TYPE "long int"
377
378 /* Width of wchar_t in bits.  */
379 /* Override svr4.h definition.  */
380 #undef  WCHAR_TYPE_SIZE
381 #define WCHAR_TYPE_SIZE 32
382
383 /* Make int foo : 8 not cause structures to be aligned to an int boundary.  */
384 /* Override elfos.h definition.  */
385 #undef  PCC_BITFIELD_TYPE_MATTERS
386 #define PCC_BITFIELD_TYPE_MATTERS (TARGET_BITFIELD_TYPE)
387
388 #undef  BITFIELD_NBYTES_LIMITED
389 #define BITFIELD_NBYTES_LIMITED (TARGET_NO_BITFIELD_WORD)
390
391 /* Define this macro to be the value 1 if instructions will fail to
392    work if given data not on the nominal alignment.  If instructions
393    will merely go slower in that case, define this macro as 0.  */
394 #undef  STRICT_ALIGNMENT
395 #define STRICT_ALIGNMENT (TARGET_STRICT_ALIGN)
396
397 /* Define this macro if you wish to preserve a certain alignment for
398    the stack pointer, greater than what the hardware enforces.  The
399    definition is a C expression for the desired alignment (measured
400    in bits).  This macro must evaluate to a value equal to or larger
401    than STACK_BOUNDARY.
402    For the SYSV ABI and variants the alignment of the stack pointer
403    is usually controlled manually in rs6000.c. However, to maintain
404    alignment across alloca () in all circumstances,
405    PREFERRED_STACK_BOUNDARY needs to be set as well.
406    This has the additional advantage of allowing a bigger maximum
407    alignment of user objects on the stack.  */
408
409 #undef PREFERRED_STACK_BOUNDARY
410 #define PREFERRED_STACK_BOUNDARY 128
411
412 /* Real stack boundary as mandated by the appropriate ABI.  */
413 #define ABI_STACK_BOUNDARY \
414   ((TARGET_EABI && !TARGET_ALTIVEC && !TARGET_ALTIVEC_ABI) ? 64 : 128)
415
416 /* An expression for the alignment of a structure field FIELD if the
417    alignment computed in the usual way is COMPUTED.  */
418 #define ADJUST_FIELD_ALIGN(FIELD, COMPUTED)                                   \
419         ((TARGET_ALTIVEC && TREE_CODE (TREE_TYPE (FIELD)) == VECTOR_TYPE)     \
420          ? 128 : COMPUTED)
421
422 /* Define this macro as an expression for the alignment of a type
423    (given by TYPE as a tree node) if the alignment computed in the
424    usual way is COMPUTED and the alignment explicitly specified was
425    SPECIFIED.  */
426 #define ROUND_TYPE_ALIGN(TYPE, COMPUTED, SPECIFIED)                     \
427         ((TARGET_ALTIVEC  && TREE_CODE (TYPE) == VECTOR_TYPE)           \
428          ? MAX (MAX ((COMPUTED), (SPECIFIED)), 128)                     \
429          : MAX (COMPUTED, SPECIFIED))
430
431 #undef  BIGGEST_FIELD_ALIGNMENT
432
433 /* Use ELF style section commands.  */
434
435 #define TEXT_SECTION_ASM_OP     "\t.section\t\".text\""
436
437 #define DATA_SECTION_ASM_OP     "\t.section\t\".data\""
438
439 #define BSS_SECTION_ASM_OP      "\t.section\t\".bss\""
440
441 /* Override elfos.h definition.  */
442 #undef  INIT_SECTION_ASM_OP
443 #define INIT_SECTION_ASM_OP "\t.section\t\".init\",\"ax\""
444
445 /* Override elfos.h definition.  */
446 #undef  FINI_SECTION_ASM_OP
447 #define FINI_SECTION_ASM_OP "\t.section\t\".fini\",\"ax\""
448
449 #define TOC_SECTION_ASM_OP "\t.section\t\".got\",\"aw\""
450
451 /* Put PC relative got entries in .got2.  */
452 #define MINIMAL_TOC_SECTION_ASM_OP \
453   (TARGET_RELOCATABLE || (flag_pic && DEFAULT_ABI != ABI_AIX)           \
454    ? "\t.section\t\".got2\",\"aw\"" : "\t.section\t\".got1\",\"aw\"")
455
456 #define SDATA_SECTION_ASM_OP "\t.section\t\".sdata\",\"aw\""
457 #define SDATA2_SECTION_ASM_OP "\t.section\t\".sdata2\",\"a\""
458 #define SBSS_SECTION_ASM_OP "\t.section\t\".sbss\",\"aw\",@nobits"
459
460 /* Besides the usual ELF sections, we need a toc section.  */
461 /* Override elfos.h definition.  */
462 #undef  EXTRA_SECTIONS
463 #define EXTRA_SECTIONS in_toc, in_sdata, in_sdata2, in_sbss, in_init, in_fini
464
465 /* Override elfos.h definition.  */
466 #undef  EXTRA_SECTION_FUNCTIONS
467 #define EXTRA_SECTION_FUNCTIONS                                         \
468   TOC_SECTION_FUNCTION                                                  \
469   SDATA_SECTION_FUNCTION                                                \
470   SDATA2_SECTION_FUNCTION                                               \
471   SBSS_SECTION_FUNCTION                                                 \
472   INIT_SECTION_FUNCTION                                                 \
473   FINI_SECTION_FUNCTION
474
475 #define TOC_SECTION_FUNCTION                                            \
476 void                                                                    \
477 toc_section (void)                                                      \
478 {                                                                       \
479   if (in_section != in_toc)                                             \
480     {                                                                   \
481       in_section = in_toc;                                              \
482       if (DEFAULT_ABI == ABI_AIX                                        \
483           && TARGET_MINIMAL_TOC                                         \
484           && !TARGET_RELOCATABLE)                                       \
485         {                                                               \
486           if (! toc_initialized)                                        \
487             {                                                           \
488               toc_initialized = 1;                                      \
489               fprintf (asm_out_file, "%s\n", TOC_SECTION_ASM_OP);       \
490               (*targetm.asm_out.internal_label) (asm_out_file, "LCTOC", 0); \
491               fprintf (asm_out_file, "\t.tc ");                         \
492               ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1[TC],"); \
493               ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1"); \
494               fprintf (asm_out_file, "\n");                             \
495                                                                         \
496               fprintf (asm_out_file, "%s\n", MINIMAL_TOC_SECTION_ASM_OP); \
497               ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1"); \
498               fprintf (asm_out_file, " = .+32768\n");                   \
499             }                                                           \
500           else                                                          \
501             fprintf (asm_out_file, "%s\n", MINIMAL_TOC_SECTION_ASM_OP); \
502         }                                                               \
503       else if (DEFAULT_ABI == ABI_AIX && !TARGET_RELOCATABLE)           \
504         fprintf (asm_out_file, "%s\n", TOC_SECTION_ASM_OP);             \
505       else                                                              \
506         {                                                               \
507           fprintf (asm_out_file, "%s\n", MINIMAL_TOC_SECTION_ASM_OP);   \
508           if (! toc_initialized)                                        \
509             {                                                           \
510               ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1"); \
511               fprintf (asm_out_file, " = .+32768\n");                   \
512               toc_initialized = 1;                                      \
513             }                                                           \
514         }                                                               \
515     }                                                                   \
516 }                                                                       \
517                                                                         \
518 extern int in_toc_section (void);                                       \
519 int in_toc_section (void)                                               \
520 {                                                                       \
521   return in_section == in_toc;                                          \
522 }
523
524 #define SDATA_SECTION_FUNCTION                                          \
525 void                                                                    \
526 sdata_section (void)                                                    \
527 {                                                                       \
528   if (in_section != in_sdata)                                           \
529     {                                                                   \
530       in_section = in_sdata;                                            \
531       fprintf (asm_out_file, "%s\n", SDATA_SECTION_ASM_OP);             \
532     }                                                                   \
533 }
534
535 #define SDATA2_SECTION_FUNCTION                                         \
536 void                                                                    \
537 sdata2_section (void)                                                   \
538 {                                                                       \
539   if (in_section != in_sdata2)                                          \
540     {                                                                   \
541       in_section = in_sdata2;                                           \
542       fprintf (asm_out_file, "%s\n", SDATA2_SECTION_ASM_OP);            \
543     }                                                                   \
544 }
545
546 #define SBSS_SECTION_FUNCTION                                           \
547 void                                                                    \
548 sbss_section (void)                                                     \
549 {                                                                       \
550   if (in_section != in_sbss)                                            \
551     {                                                                   \
552       in_section = in_sbss;                                             \
553       fprintf (asm_out_file, "%s\n", SBSS_SECTION_ASM_OP);              \
554     }                                                                   \
555 }
556
557 #define INIT_SECTION_FUNCTION                                           \
558 void                                                                    \
559 init_section (void)                                                     \
560 {                                                                       \
561   if (in_section != in_init)                                            \
562     {                                                                   \
563       in_section = in_init;                                             \
564       fprintf (asm_out_file, "%s\n", INIT_SECTION_ASM_OP);              \
565     }                                                                   \
566 }
567
568 #define FINI_SECTION_FUNCTION                                           \
569 void                                                                    \
570 fini_section (void)                                                     \
571 {                                                                       \
572   if (in_section != in_fini)                                            \
573     {                                                                   \
574       in_section = in_fini;                                             \
575       fprintf (asm_out_file, "%s\n", FINI_SECTION_ASM_OP);              \
576     }                                                                   \
577 }
578
579 /* Override default elf definitions.  */
580 #undef  TARGET_ASM_SELECT_RTX_SECTION
581 #define TARGET_ASM_SELECT_RTX_SECTION rs6000_elf_select_rtx_section
582 #undef  TARGET_ASM_SELECT_SECTION
583 #define TARGET_ASM_SELECT_SECTION  rs6000_elf_select_section
584 #define TARGET_ASM_UNIQUE_SECTION  rs6000_elf_unique_section
585
586 /* Return nonzero if this entry is to be written into the constant pool
587    in a special way.  We do so if this is a SYMBOL_REF, LABEL_REF or a CONST
588    containing one of them.  If -mfp-in-toc (the default), we also do
589    this for floating-point constants.  We actually can only do this
590    if the FP formats of the target and host machines are the same, but
591    we can't check that since not every file that uses
592    GO_IF_LEGITIMATE_ADDRESS_P includes real.h.
593
594    Unlike AIX, we don't key off of -mminimal-toc, but instead do not
595    allow floating point constants in the TOC if -mrelocatable.  */
596
597 #undef  ASM_OUTPUT_SPECIAL_POOL_ENTRY_P
598 #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE)                        \
599   (TARGET_TOC                                                           \
600    && (GET_CODE (X) == SYMBOL_REF                                       \
601        || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS      \
602            && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF)           \
603        || GET_CODE (X) == LABEL_REF                                     \
604        || (GET_CODE (X) == CONST_INT                                    \
605            && GET_MODE_BITSIZE (MODE) <= GET_MODE_BITSIZE (Pmode))      \
606        || (!TARGET_NO_FP_IN_TOC                                         \
607            && !TARGET_RELOCATABLE                                       \
608            && GET_CODE (X) == CONST_DOUBLE                              \
609            && GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT               \
610            && BITS_PER_WORD == HOST_BITS_PER_INT)))
611
612 /* These macros generate the special .type and .size directives which
613    are used to set the corresponding fields of the linker symbol table
614    entries in an ELF object file under SVR4.  These macros also output
615    the starting labels for the relevant functions/objects.  */
616
617 /* Write the extra assembler code needed to declare a function properly.
618    Some svr4 assemblers need to also have something extra said about the
619    function's return value.  We allow for that here.  */
620
621 extern int rs6000_pic_labelno;
622
623 /* Override elfos.h definition.  */
624 #undef  ASM_DECLARE_FUNCTION_NAME
625 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
626   rs6000_elf_declare_function_name ((FILE), (NAME), (DECL))
627
628 /* The USER_LABEL_PREFIX stuff is affected by the -fleading-underscore
629    flag.  The LOCAL_LABEL_PREFIX variable is used by dbxelf.h.  */
630
631 #define LOCAL_LABEL_PREFIX "."
632 #define USER_LABEL_PREFIX ""
633
634 /* svr4.h overrides (*targetm.asm_out.internal_label).  */
635
636 #define ASM_OUTPUT_INTERNAL_LABEL_PREFIX(FILE,PREFIX)   \
637   asm_fprintf (FILE, "%L%s", PREFIX)
638
639 /* Globalizing directive for a label.  */
640 #define GLOBAL_ASM_OP "\t.globl "
641
642 /* This says how to output assembler code to declare an
643    uninitialized internal linkage data object.  Under SVR4,
644    the linker seems to want the alignment of data objects
645    to depend on their types.  We do exactly that here.  */
646
647 #define LOCAL_ASM_OP    "\t.local\t"
648
649 #define LCOMM_ASM_OP    "\t.lcomm\t"
650
651 /* Override elfos.h definition.  */
652 #undef  ASM_OUTPUT_ALIGNED_LOCAL
653 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
654 do {                                                                    \
655   if (rs6000_sdata != SDATA_NONE && (SIZE) > 0                          \
656       && (SIZE) <= g_switch_value)                                      \
657     {                                                                   \
658       sbss_section ();                                                  \
659       ASM_OUTPUT_ALIGN (FILE, exact_log2 (ALIGN / BITS_PER_UNIT));      \
660       ASM_OUTPUT_LABEL (FILE, NAME);                                    \
661       ASM_OUTPUT_SKIP (FILE, SIZE);                                     \
662       if (!flag_inhibit_size_directive && (SIZE) > 0)                   \
663         ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE);                   \
664     }                                                                   \
665   else                                                                  \
666     {                                                                   \
667       fprintf (FILE, "%s", LCOMM_ASM_OP);                               \
668       assemble_name ((FILE), (NAME));                                   \
669       fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",          \
670                (SIZE), (ALIGN) / BITS_PER_UNIT);                        \
671     }                                                                   \
672   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");                     \
673 } while (0)
674
675 /* Describe how to emit uninitialized external linkage items.  */
676 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN)           \
677 do {                                                                    \
678   ASM_OUTPUT_ALIGNED_LOCAL (FILE, NAME, SIZE, ALIGN);                   \
679 } while (0)
680
681 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
682 /* To support -falign-* switches we need to use .p2align so
683    that alignment directives in code sections will be padded
684    with no-op instructions, rather than zeroes.  */
685 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP)                    \
686   if ((LOG) != 0)                                                       \
687     {                                                                   \
688       if ((MAX_SKIP) == 0)                                              \
689         fprintf ((FILE), "\t.p2align %d\n", (LOG));                     \
690       else                                                              \
691         fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));     \
692     }
693 #endif
694
695 /* This is how to output code to push a register on the stack.
696    It need not be very fast code.
697
698    On the rs6000, we must keep the backchain up to date.  In order
699    to simplify things, always allocate 16 bytes for a push (System V
700    wants to keep stack aligned to a 16 byte boundary).  */
701
702 #define ASM_OUTPUT_REG_PUSH(FILE, REGNO)                                \
703 do {                                                                    \
704   if (DEFAULT_ABI == ABI_V4)                                            \
705     asm_fprintf (FILE,                                                  \
706                  "\t{stu|stwu} %s,-16(%s)\n\t{st|stw} %s,12(%s)\n",     \
707                  reg_names[1], reg_names[1], reg_names[REGNO],          \
708                  reg_names[1]);                                         \
709 } while (0)
710
711 /* This is how to output an insn to pop a register from the stack.
712    It need not be very fast code.  */
713
714 #define ASM_OUTPUT_REG_POP(FILE, REGNO)                                 \
715 do {                                                                    \
716   if (DEFAULT_ABI == ABI_V4)                                            \
717     asm_fprintf (FILE,                                                  \
718                  "\t{l|lwz} %s,12(%s)\n\t{ai|addic} %s,%s,16\n",        \
719                  reg_names[REGNO], reg_names[1], reg_names[1],          \
720                  reg_names[1]);                                         \
721 } while (0)
722
723 /* Switch  Recognition by gcc.c.  Add -G xx support.  */
724
725 /* Override svr4.h definition.  */
726 #undef  SWITCH_TAKES_ARG
727 #define SWITCH_TAKES_ARG(CHAR)                                          \
728   ((CHAR) == 'D' || (CHAR) == 'U' || (CHAR) == 'o'                      \
729    || (CHAR) == 'e' || (CHAR) == 'T' || (CHAR) == 'u'                   \
730    || (CHAR) == 'I' || (CHAR) == 'm' || (CHAR) == 'x'                   \
731    || (CHAR) == 'L' || (CHAR) == 'A' || (CHAR) == 'V'                   \
732    || (CHAR) == 'B' || (CHAR) == 'b' || (CHAR) == 'G')
733
734 extern int fixuplabelno;
735
736 /* Handle constructors specially for -mrelocatable.  */
737 #define TARGET_ASM_CONSTRUCTOR  rs6000_elf_asm_out_constructor
738 #define TARGET_ASM_DESTRUCTOR   rs6000_elf_asm_out_destructor
739
740 /* This is the end of what might become sysv4.h.  */
741
742 /* Use DWARF 2 debugging information by default.  */
743 #undef  PREFERRED_DEBUGGING_TYPE
744 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
745
746 /* Historically we have also supported stabs debugging.  */
747 #define DBX_DEBUGGING_INFO 1
748
749 #define DBX_REGISTER_NUMBER(REGNO) rs6000_dbx_register_number (REGNO)
750
751 /* Map register numbers held in the call frame info that gcc has
752    collected using DWARF_FRAME_REGNUM to those that should be output in
753    .debug_frame and .eh_frame.  We continue to use gcc hard reg numbers
754    for .eh_frame, but use the numbers mandated by the various ABIs for
755    .debug_frame.  rs6000_emit_prologue has translated any combination of
756    CR2, CR3, CR4 saves to a save of CR2.  The actual code emitted saves
757    the whole of CR, so we map CR2_REGNO to the DWARF reg for CR.  */
758 #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH)     \
759   ((FOR_EH) ? (REGNO)                           \
760    : (REGNO) == CR2_REGNO ? 64                  \
761    : DBX_REGISTER_NUMBER (REGNO))
762
763 #define TARGET_ENCODE_SECTION_INFO  rs6000_elf_encode_section_info
764 #define TARGET_IN_SMALL_DATA_P  rs6000_elf_in_small_data_p
765 #define TARGET_SECTION_TYPE_FLAGS  rs6000_elf_section_type_flags
766
767 /* The ELF version doesn't encode [DS] or whatever at the end of symbols.  */
768
769 #define RS6000_OUTPUT_BASENAME(FILE, NAME)      \
770     assemble_name (FILE, NAME)
771
772 /* We have to output the stabs for the function name *first*, before
773    outputting its label.  */
774
775 #define DBX_FUNCTION_FIRST
776
777 /* This is the end of what might become sysv4dbx.h.  */
778
779 #ifndef TARGET_VERSION
780 #define TARGET_VERSION fprintf (stderr, " (PowerPC System V.4)");
781 #endif
782 \f
783 #define TARGET_OS_SYSV_CPP_BUILTINS()           \
784   do                                            \
785     {                                           \
786       if (flag_pic == 1)                        \
787         {                                       \
788           builtin_define ("__pic__=1");         \
789           builtin_define ("__PIC__=1");         \
790         }                                       \
791       else if (flag_pic == 2)                   \
792         {                                       \
793           builtin_define ("__pic__=2");         \
794           builtin_define ("__PIC__=2");         \
795         }                                       \
796       if (target_flags_explicit                 \
797           & MASK_RELOCATABLE)                   \
798         builtin_define ("_RELOCATABLE");        \
799     }                                           \
800   while (0)
801
802 #ifndef TARGET_OS_CPP_BUILTINS
803 #define TARGET_OS_CPP_BUILTINS()                \
804   do                                            \
805     {                                           \
806       builtin_define_std ("PPC");               \
807       builtin_define_std ("unix");              \
808       builtin_define ("__svr4__");              \
809       builtin_assert ("system=unix");           \
810       builtin_assert ("system=svr4");           \
811       builtin_assert ("cpu=powerpc");           \
812       builtin_assert ("machine=powerpc");       \
813       TARGET_OS_SYSV_CPP_BUILTINS ();           \
814     }                                           \
815   while (0)
816 #endif
817
818 /* Pass various options to the assembler.  */
819 /* Override svr4.h definition.  */
820 #undef  ASM_SPEC
821 #define ASM_SPEC "%(asm_cpu) \
822 %{.s: %{mregnames} %{mno-regnames}} %{.S: %{mregnames} %{mno-regnames}} \
823 %{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*} \
824 %{mrelocatable} %{mrelocatable-lib} %{fpic|fpie|fPIC|fPIE:-K PIC} \
825 %{memb|msdata|msdata=eabi: -memb} \
826 %{mlittle|mlittle-endian:-mlittle; \
827   mbig|mbig-endian      :-mbig;    \
828   mcall-aixdesc |                  \
829   mcall-freebsd |                  \
830   mcall-netbsd  |                  \
831   mcall-openbsd |                  \
832   mcall-linux   |                  \
833   mcall-gnu             :-mbig;    \
834   mcall-i960-old        :-mlittle}"
835
836 #define CC1_ENDIAN_BIG_SPEC ""
837
838 #define CC1_ENDIAN_LITTLE_SPEC "\
839 %{!mstrict-align: %{!mno-strict-align: \
840     %{!mcall-i960-old: \
841         -mstrict-align \
842     } \
843 }}"
844
845 #define CC1_ENDIAN_DEFAULT_SPEC "%(cc1_endian_big)"
846
847 /* Pass -G xxx to the compiler and set correct endian mode.  */
848 #define CC1_SPEC "%{G*} \
849 %{mlittle|mlittle-endian: %(cc1_endian_little);           \
850   mbig   |mbig-endian   : %(cc1_endian_big);              \
851   mcall-aixdesc |                                         \
852   mcall-freebsd |                                         \
853   mcall-netbsd  |                                         \
854   mcall-openbsd |                                         \
855   mcall-linux   |                                         \
856   mcall-gnu             : -mbig %(cc1_endian_big);        \
857   mcall-i960-old        : -mlittle %(cc1_endian_little);  \
858                         : %(cc1_endian_default)}          \
859 %{mno-sdata: -msdata=none } \
860 %{meabi: %{!mcall-*: -mcall-sysv }} \
861 %{!meabi: %{!mno-eabi: \
862     %{mrelocatable: -meabi } \
863     %{mcall-freebsd: -mno-eabi } \
864     %{mcall-i960-old: -meabi } \
865     %{mcall-linux: -mno-eabi } \
866     %{mcall-gnu: -mno-eabi } \
867     %{mcall-netbsd: -mno-eabi } \
868     %{mcall-openbsd: -mno-eabi }}} \
869 %{msdata: -msdata=default} \
870 %{mno-sdata: -msdata=none} \
871 %{profile: -p}"
872
873 /* Don't put -Y P,<path> for cross compilers.  */
874 #ifndef CROSS_COMPILE
875 #define LINK_PATH_SPEC "\
876 %{!R*:%{L*:-R %*}} \
877 %{!nostdlib: %{!YP,*: \
878     %{compat-bsd: \
879         %{p:-Y P,/usr/ucblib:/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
880         %{!p:-Y P,/usr/ucblib:/usr/ccs/lib:/usr/lib}} \
881         %{!R*: %{!L*: -R /usr/ucblib}} \
882     %{!compat-bsd: \
883         %{p:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
884         %{!p:-Y P,/usr/ccs/lib:/usr/lib}}}}"
885
886 #else
887 #define LINK_PATH_SPEC ""
888 #endif
889
890 /* Default starting address if specified.  */
891 #define LINK_START_SPEC "\
892 %{mads         : %(link_start_ads)         ; \
893   myellowknife : %(link_start_yellowknife) ; \
894   mmvme        : %(link_start_mvme)        ; \
895   msim         : %(link_start_sim)         ; \
896   mwindiss     : %(link_start_windiss)     ; \
897   mcall-freebsd: %(link_start_freebsd)     ; \
898   mcall-linux  : %(link_start_linux)       ; \
899   mcall-gnu    : %(link_start_gnu)         ; \
900   mcall-netbsd : %(link_start_netbsd)      ; \
901   mcall-openbsd: %(link_start_openbsd)     ; \
902                : %(link_start_default)     }"
903
904 #define LINK_START_DEFAULT_SPEC ""
905
906 /* Override svr4.h definition.  */
907 #undef  LINK_SPEC
908 #define LINK_SPEC "\
909 %{h*} %{v:-V} %{!msdata=none:%{G*}} %{msdata=none:-G0} \
910 %{YP,*} %{R*} \
911 %{Qy:} %{!Qn:-Qy} \
912 %(link_shlib) \
913 %{!Wl,-T*: %{!T*: %(link_start) }} \
914 %(link_target) \
915 %(link_os)"
916
917 /* For now, turn off shared libraries by default.  */
918 #ifndef SHARED_LIB_SUPPORT
919 #define NO_SHARED_LIB_SUPPORT
920 #endif
921
922 #ifndef NO_SHARED_LIB_SUPPORT
923 /* Shared libraries are default.  */
924 #define LINK_SHLIB_SPEC "\
925 %{!static: %(link_path) %{!R*:%{L*:-R %*}}} \
926 %{mshlib: } \
927 %{static:-dn -Bstatic} \
928 %{shared:-G -dy -z text} \
929 %{symbolic:-Bsymbolic -G -dy -z text}"
930
931 #else
932 /* Shared libraries are not default.  */
933 #define LINK_SHLIB_SPEC "\
934 %{mshlib: %(link_path) } \
935 %{!mshlib: %{!shared: %{!symbolic: -dn -Bstatic}}} \
936 %{static: } \
937 %{shared:-G -dy -z text %(link_path) } \
938 %{symbolic:-Bsymbolic -G -dy -z text %(link_path) }"
939 #endif
940
941 /* Override the default target of the linker.  */
942 #define LINK_TARGET_SPEC "\
943 %{mlittle: --oformat elf32-powerpcle } %{mlittle-endian: --oformat elf32-powerpcle } \
944 %{!mlittle: %{!mlittle-endian: %{!mbig: %{!mbig-endian: \
945     %{mcall-i960-old: --oformat elf32-powerpcle} \
946   }}}}"
947
948 /* Any specific OS flags.  */
949 #define LINK_OS_SPEC "\
950 %{mads         : %(link_os_ads)         ; \
951   myellowknife : %(link_os_yellowknife) ; \
952   mmvme        : %(link_os_mvme)        ; \
953   msim         : %(link_os_sim)         ; \
954   mwindiss     : %(link_os_windiss)     ; \
955   mcall-freebsd: %(link_os_freebsd)     ; \
956   mcall-linux  : %(link_os_linux)       ; \
957   mcall-gnu    : %(link_os_gnu)         ; \
958   mcall-netbsd : %(link_os_netbsd)      ; \
959   mcall-openbsd: %(link_os_openbsd)     ; \
960                : %(link_os_default)     }"
961
962 #define LINK_OS_DEFAULT_SPEC ""
963
964 /* Override rs6000.h definition.  */
965 #undef  CPP_SPEC
966 #define CPP_SPEC "%{posix: -D_POSIX_SOURCE} \
967 %{mads         : %(cpp_os_ads)         ; \
968   myellowknife : %(cpp_os_yellowknife) ; \
969   mmvme        : %(cpp_os_mvme)        ; \
970   msim         : %(cpp_os_sim)         ; \
971   mwindiss     : %(cpp_os_windiss)     ; \
972   mcall-freebsd: %(cpp_os_freebsd)     ; \
973   mcall-linux  : %(cpp_os_linux)       ; \
974   mcall-gnu    : %(cpp_os_gnu)         ; \
975   mcall-netbsd : %(cpp_os_netbsd)      ; \
976   mcall-openbsd: %(cpp_os_openbsd)     ; \
977                : %(cpp_os_default)     }"
978
979 #define CPP_OS_DEFAULT_SPEC ""
980
981 /* Override svr4.h definition.  */
982 #undef  STARTFILE_SPEC
983 #define STARTFILE_SPEC "\
984 %{mads         : %(startfile_ads)         ; \
985   myellowknife : %(startfile_yellowknife) ; \
986   mmvme        : %(startfile_mvme)        ; \
987   msim         : %(startfile_sim)         ; \
988   mwindiss     : %(startfile_windiss)     ; \
989   mcall-freebsd: %(startfile_freebsd)     ; \
990   mcall-linux  : %(startfile_linux)       ; \
991   mcall-gnu    : %(startfile_gnu)         ; \
992   mcall-netbsd : %(startfile_netbsd)      ; \
993   mcall-openbsd: %(startfile_openbsd)     ; \
994                : %(startfile_default)     }"
995
996 #define STARTFILE_DEFAULT_SPEC ""
997
998 /* Override svr4.h definition.  */
999 #undef  LIB_SPEC
1000 #define LIB_SPEC "\
1001 %{mads         : %(lib_ads)         ; \
1002   myellowknife : %(lib_yellowknife) ; \
1003   mmvme        : %(lib_mvme)        ; \
1004   msim         : %(lib_sim)         ; \
1005   mwindiss     : %(lib_windiss)     ; \
1006   mcall-freebsd: %(lib_freebsd)     ; \
1007   mcall-linux  : %(lib_linux)       ; \
1008   mcall-gnu    : %(lib_gnu)         ; \
1009   mcall-netbsd : %(lib_netbsd)      ; \
1010   mcall-openbsd: %(lib_openbsd)     ; \
1011                : %(lib_default)     }"
1012
1013 #define LIB_DEFAULT_SPEC ""
1014
1015 /* Override svr4.h definition.  */
1016 #undef  ENDFILE_SPEC
1017 #define ENDFILE_SPEC "\
1018 %{mads         : crtsavres.o%s        %(endfile_ads)         ; \
1019   myellowknife : crtsavres.o%s        %(endfile_yellowknife) ; \
1020   mmvme        : crtsavres.o%s        %(endfile_mvme)        ; \
1021   msim         : crtsavres.o%s        %(endfile_sim)         ; \
1022   mwindiss     :                      %(endfile_windiss)     ; \
1023   mcall-freebsd: crtsavres.o%s        %(endfile_freebsd)     ; \
1024   mcall-linux  : crtsavres.o%s        %(endfile_linux)       ; \
1025   mcall-gnu    : crtsavres.o%s        %(endfile_gnu)         ; \
1026   mcall-netbsd : crtsavres.o%s        %(endfile_netbsd)      ; \
1027   mcall-openbsd: crtsavres.o%s        %(endfile_openbsd)     ; \
1028                : %(crtsavres_default) %(endfile_default)     }"
1029
1030 #define CRTSAVRES_DEFAULT_SPEC "crtsavres.o%s"
1031
1032 #define ENDFILE_DEFAULT_SPEC ""
1033
1034 /* Motorola ADS support.  */
1035 #define LIB_ADS_SPEC "--start-group -lads -lc --end-group"
1036
1037 #define STARTFILE_ADS_SPEC "ecrti.o%s crt0.o%s crtbegin.o%s"
1038
1039 #define ENDFILE_ADS_SPEC "crtend.o%s ecrtn.o%s"
1040
1041 #define LINK_START_ADS_SPEC "-T ads.ld%s"
1042
1043 #define LINK_OS_ADS_SPEC ""
1044
1045 #define CPP_OS_ADS_SPEC ""
1046
1047 /* Motorola Yellowknife support.  */
1048 #define LIB_YELLOWKNIFE_SPEC "--start-group -lyk -lc --end-group"
1049
1050 #define STARTFILE_YELLOWKNIFE_SPEC "ecrti.o%s crt0.o%s crtbegin.o%s"
1051
1052 #define ENDFILE_YELLOWKNIFE_SPEC "crtend.o%s ecrtn.o%s"
1053
1054 #define LINK_START_YELLOWKNIFE_SPEC "-T yellowknife.ld%s"
1055
1056 #define LINK_OS_YELLOWKNIFE_SPEC ""
1057
1058 #define CPP_OS_YELLOWKNIFE_SPEC ""
1059
1060 /* Motorola MVME support.  */
1061 #define LIB_MVME_SPEC "--start-group -lmvme -lc --end-group"
1062
1063 #define STARTFILE_MVME_SPEC "ecrti.o%s crt0.o%s crtbegin.o%s"
1064
1065 #define ENDFILE_MVME_SPEC "crtend.o%s ecrtn.o%s"
1066
1067 #define LINK_START_MVME_SPEC "-Ttext 0x40000"
1068
1069 #define LINK_OS_MVME_SPEC ""
1070
1071 #define CPP_OS_MVME_SPEC ""
1072
1073 /* PowerPC simulator based on netbsd system calls support.  */
1074 #define LIB_SIM_SPEC "--start-group -lsim -lc --end-group"
1075
1076 #define STARTFILE_SIM_SPEC "ecrti.o%s sim-crt0.o%s crtbegin.o%s"
1077
1078 #define ENDFILE_SIM_SPEC "crtend.o%s ecrtn.o%s"
1079
1080 #define LINK_START_SIM_SPEC ""
1081
1082 #define LINK_OS_SIM_SPEC "-m elf32ppcsim"
1083
1084 #define CPP_OS_SIM_SPEC ""
1085
1086 /* FreeBSD support.  */
1087
1088 #define CPP_OS_FREEBSD_SPEC     "\
1089   -D__PPC__ -D__ppc__ -D__PowerPC__ -D__powerpc__ \
1090   -Acpu=powerpc -Amachine=powerpc"
1091
1092 #define STARTFILE_FREEBSD_SPEC  FBSD_STARTFILE_SPEC
1093 #define ENDFILE_FREEBSD_SPEC    FBSD_ENDFILE_SPEC
1094 #define LIB_FREEBSD_SPEC        FBSD_LIB_SPEC
1095 #define LINK_START_FREEBSD_SPEC ""
1096
1097 #define LINK_OS_FREEBSD_SPEC "\
1098   %{p:%nconsider using `-pg' instead of `-p' with gprof(1)} \
1099   %{Wl,*:%*} \
1100   %{v:-V} \
1101   %{assert*} %{R*} %{rpath*} %{defsym*} \
1102   %{shared:-Bshareable %{h*} %{soname*}} \
1103   %{!shared: \
1104     %{!static: \
1105       %{rdynamic: -export-dynamic} \
1106       %{!dynamic-linker:-dynamic-linker %(fbsd_dynamic_linker) }} \
1107     %{static:-Bstatic}} \
1108   %{symbolic:-Bsymbolic}"
1109
1110 /* GNU/Linux support.  */
1111 #define LIB_LINUX_SPEC "%{mnewlib: --start-group -llinux -lc --end-group } \
1112 %{!mnewlib: %{pthread:-lpthread} %{shared:-lc} \
1113 %{!shared: %{profile:-lc_p} %{!profile:-lc}}}"
1114
1115 #ifdef HAVE_LD_PIE
1116 #define STARTFILE_LINUX_SPEC "\
1117 %{!shared: %{pg|p|profile:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}} \
1118 %{mnewlib:ecrti.o%s;:crti.o%s} \
1119 %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
1120 #else
1121 #define STARTFILE_LINUX_SPEC "\
1122 %{!shared: %{pg|p|profile:gcrt1.o%s;:crt1.o%s}} \
1123 %{mnewlib:ecrti.o%s;:crti.o%s} \
1124 %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
1125 #endif
1126
1127 #define ENDFILE_LINUX_SPEC "\
1128 %{shared|pie:crtendS.o%s;:crtend.o%s} \
1129 %{mnewlib:ecrtn.o%s;:crtn.o%s}"
1130
1131 #define LINK_START_LINUX_SPEC ""
1132
1133 #define LINK_OS_LINUX_SPEC "-m elf32ppclinux %{!shared: %{!static: \
1134   %{rdynamic:-export-dynamic} \
1135   %{!dynamic-linker:-dynamic-linker /lib/ld.so.1}}}"
1136
1137 #if defined(HAVE_LD_EH_FRAME_HDR)
1138 # define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
1139 #endif
1140
1141 #define CPP_OS_LINUX_SPEC "-D__unix__ -D__gnu_linux__ -D__linux__ \
1142 %{!undef:                                                         \
1143   %{!ansi:                                                        \
1144     %{!std=*:-Dunix -D__unix -Dlinux -D__linux}                   \
1145     %{std=gnu*:-Dunix -D__unix -Dlinux -D__linux}}}               \
1146 -Asystem=linux -Asystem=unix -Asystem=posix %{pthread:-D_REENTRANT}"
1147
1148 /* GNU/Hurd support.  */
1149 #define LIB_GNU_SPEC "%{mnewlib: --start-group -lgnu -lc --end-group } \
1150 %{!mnewlib: %{shared:-lc} %{!shared: %{pthread:-lpthread } \
1151 %{profile:-lc_p} %{!profile:-lc}}}"
1152
1153 #define STARTFILE_GNU_SPEC "\
1154 %{!shared: %{!static: %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}} \
1155 %{static: %{pg:gcrt0.o%s} %{!pg:%{p:gcrt0.o%s} %{!p:crt0.o%s}}} \
1156 %{mnewlib: ecrti.o%s} %{!mnewlib: crti.o%s} \
1157 %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
1158
1159 #define ENDFILE_GNU_SPEC "%{!shared:crtend.o%s} %{shared:crtendS.o%s} \
1160 %{mnewlib: ecrtn.o%s} %{!mnewlib: crtn.o%s}"
1161
1162 #define LINK_START_GNU_SPEC ""
1163
1164 #define LINK_OS_GNU_SPEC "-m elf32ppclinux %{!shared: %{!static: \
1165   %{rdynamic:-export-dynamic} \
1166   %{!dynamic-linker:-dynamic-linker /lib/ld.so.1}}}"
1167
1168 #define CPP_OS_GNU_SPEC "-D__unix__ -D__gnu_hurd__ -D__GNU__    \
1169 %{!undef:                                                       \
1170   %{!ansi: -Dunix -D__unix}}                                    \
1171 -Asystem=gnu -Asystem=unix -Asystem=posix %{pthread:-D_REENTRANT}"
1172
1173 /* NetBSD support.  */
1174 #define LIB_NETBSD_SPEC "\
1175 %{profile:-lgmon -lc_p} %{!profile:-lc}"
1176
1177 #define STARTFILE_NETBSD_SPEC "\
1178 ncrti.o%s crt0.o%s \
1179 %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
1180
1181 #define ENDFILE_NETBSD_SPEC "\
1182 %{!shared:crtend.o%s} %{shared:crtendS.o%s} \
1183 ncrtn.o%s"
1184
1185 #define LINK_START_NETBSD_SPEC "\
1186 "
1187
1188 #define LINK_OS_NETBSD_SPEC "\
1189 %{!shared: %{!static: \
1190   %{rdynamic:-export-dynamic} \
1191   %{!dynamic-linker:-dynamic-linker /usr/libexec/ld.elf_so}}}"
1192
1193 #define CPP_OS_NETBSD_SPEC "\
1194 -D__powerpc__ -D__NetBSD__ -D__KPRINTF_ATTRIBUTE__"
1195
1196 /* OpenBSD support.  */
1197 #ifndef LIB_OPENBSD_SPEC
1198 #define LIB_OPENBSD_SPEC "%{!shared:%{pthread:-lpthread%{p:_p}%{!p:%{pg:_p}}}} %{!shared:-lc%{p:_p}%{!p:%{pg:_p}}}"
1199 #endif
1200
1201 #ifndef STARTFILE_OPENBSD_SPEC
1202 #define STARTFILE_OPENBSD_SPEC "\
1203 %{!shared: %{pg:gcrt0.o%s} %{!pg:%{p:gcrt0.o%s} %{!p:crt0.o%s}}} \
1204 %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
1205 #endif
1206
1207 #ifndef ENDFILE_OPENBSD_SPEC
1208 #define ENDFILE_OPENBSD_SPEC "\
1209 %{!shared:crtend.o%s} %{shared:crtendS.o%s}"
1210 #endif
1211
1212 #ifndef LINK_START_OPENBSD_SPEC
1213 #define LINK_START_OPENBSD_SPEC "-Ttext 0x400074"
1214 #endif
1215
1216 #ifndef LINK_OS_OPENBSD_SPEC
1217 #define LINK_OS_OPENBSD_SPEC ""
1218 #endif
1219
1220 #ifndef CPP_OS_OPENBSD_SPEC
1221 #define CPP_OS_OPENBSD_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_POSIX_THREADS}"
1222 #endif
1223
1224 /* WindISS support.  */
1225
1226 #define LIB_WINDISS_SPEC "--start-group -li -lcfp -lwindiss -lram -limpl -limpfp --end-group"
1227
1228 #define CPP_OS_WINDISS_SPEC "\
1229 -D__rtasim \
1230 -D__EABI__ \
1231 -D__ppc \
1232 %{!msoft-float: -D__hardfp} \
1233 "
1234
1235 #define STARTFILE_WINDISS_SPEC "crt0.o%s crtbegin.o%s"
1236
1237 #define ENDFILE_WINDISS_SPEC "crtend.o%s"
1238
1239 #define LINK_START_WINDISS_SPEC ""
1240
1241 #define LINK_OS_WINDISS_SPEC ""
1242
1243 /* Define any extra SPECS that the compiler needs to generate.  */
1244 /* Override rs6000.h definition.  */
1245 #undef  SUBTARGET_EXTRA_SPECS
1246 #define SUBTARGET_EXTRA_SPECS                                           \
1247   { "crtsavres_default",        CRTSAVRES_DEFAULT_SPEC },               \
1248   { "lib_ads",                  LIB_ADS_SPEC },                         \
1249   { "lib_yellowknife",          LIB_YELLOWKNIFE_SPEC },                 \
1250   { "lib_mvme",                 LIB_MVME_SPEC },                        \
1251   { "lib_sim",                  LIB_SIM_SPEC },                         \
1252   { "lib_freebsd",              LIB_FREEBSD_SPEC },                     \
1253   { "lib_gnu",                  LIB_GNU_SPEC },                         \
1254   { "lib_linux",                LIB_LINUX_SPEC },                       \
1255   { "lib_netbsd",               LIB_NETBSD_SPEC },                      \
1256   { "lib_openbsd",              LIB_OPENBSD_SPEC },                     \
1257   { "lib_windiss",              LIB_WINDISS_SPEC },                     \
1258   { "lib_default",              LIB_DEFAULT_SPEC },                     \
1259   { "startfile_ads",            STARTFILE_ADS_SPEC },                   \
1260   { "startfile_yellowknife",    STARTFILE_YELLOWKNIFE_SPEC },           \
1261   { "startfile_mvme",           STARTFILE_MVME_SPEC },                  \
1262   { "startfile_sim",            STARTFILE_SIM_SPEC },                   \
1263   { "startfile_freebsd",        STARTFILE_FREEBSD_SPEC },               \
1264   { "startfile_gnu",            STARTFILE_GNU_SPEC },                   \
1265   { "startfile_linux",          STARTFILE_LINUX_SPEC },                 \
1266   { "startfile_netbsd",         STARTFILE_NETBSD_SPEC },                \
1267   { "startfile_openbsd",        STARTFILE_OPENBSD_SPEC },               \
1268   { "startfile_windiss",        STARTFILE_WINDISS_SPEC },               \
1269   { "startfile_default",        STARTFILE_DEFAULT_SPEC },               \
1270   { "endfile_ads",              ENDFILE_ADS_SPEC },                     \
1271   { "endfile_yellowknife",      ENDFILE_YELLOWKNIFE_SPEC },             \
1272   { "endfile_mvme",             ENDFILE_MVME_SPEC },                    \
1273   { "endfile_sim",              ENDFILE_SIM_SPEC },                     \
1274   { "endfile_freebsd",          ENDFILE_FREEBSD_SPEC },                 \
1275   { "endfile_gnu",              ENDFILE_GNU_SPEC },                     \
1276   { "endfile_linux",            ENDFILE_LINUX_SPEC },                   \
1277   { "endfile_netbsd",           ENDFILE_NETBSD_SPEC },                  \
1278   { "endfile_openbsd",          ENDFILE_OPENBSD_SPEC },                 \
1279   { "endfile_windiss",          ENDFILE_WINDISS_SPEC },                 \
1280   { "endfile_default",          ENDFILE_DEFAULT_SPEC },                 \
1281   { "link_path",                LINK_PATH_SPEC },                       \
1282   { "link_shlib",               LINK_SHLIB_SPEC },                      \
1283   { "link_target",              LINK_TARGET_SPEC },                     \
1284   { "link_start",               LINK_START_SPEC },                      \
1285   { "link_start_ads",           LINK_START_ADS_SPEC },                  \
1286   { "link_start_yellowknife",   LINK_START_YELLOWKNIFE_SPEC },          \
1287   { "link_start_mvme",          LINK_START_MVME_SPEC },                 \
1288   { "link_start_sim",           LINK_START_SIM_SPEC },                  \
1289   { "link_start_freebsd",       LINK_START_FREEBSD_SPEC },              \
1290   { "link_start_gnu",           LINK_START_GNU_SPEC },                  \
1291   { "link_start_linux",         LINK_START_LINUX_SPEC },                \
1292   { "link_start_netbsd",        LINK_START_NETBSD_SPEC },               \
1293   { "link_start_openbsd",       LINK_START_OPENBSD_SPEC },              \
1294   { "link_start_windiss",       LINK_START_WINDISS_SPEC },              \
1295   { "link_start_default",       LINK_START_DEFAULT_SPEC },              \
1296   { "link_os",                  LINK_OS_SPEC },                         \
1297   { "link_os_ads",              LINK_OS_ADS_SPEC },                     \
1298   { "link_os_yellowknife",      LINK_OS_YELLOWKNIFE_SPEC },             \
1299   { "link_os_mvme",             LINK_OS_MVME_SPEC },                    \
1300   { "link_os_sim",              LINK_OS_SIM_SPEC },                     \
1301   { "link_os_freebsd",          LINK_OS_FREEBSD_SPEC },                 \
1302   { "link_os_linux",            LINK_OS_LINUX_SPEC },                   \
1303   { "link_os_gnu",              LINK_OS_GNU_SPEC },                     \
1304   { "link_os_netbsd",           LINK_OS_NETBSD_SPEC },                  \
1305   { "link_os_openbsd",          LINK_OS_OPENBSD_SPEC },                 \
1306   { "link_os_windiss",          LINK_OS_WINDISS_SPEC },                 \
1307   { "link_os_default",          LINK_OS_DEFAULT_SPEC },                 \
1308   { "cc1_endian_big",           CC1_ENDIAN_BIG_SPEC },                  \
1309   { "cc1_endian_little",        CC1_ENDIAN_LITTLE_SPEC },               \
1310   { "cc1_endian_default",       CC1_ENDIAN_DEFAULT_SPEC },              \
1311   { "cpp_os_ads",               CPP_OS_ADS_SPEC },                      \
1312   { "cpp_os_yellowknife",       CPP_OS_YELLOWKNIFE_SPEC },              \
1313   { "cpp_os_mvme",              CPP_OS_MVME_SPEC },                     \
1314   { "cpp_os_sim",               CPP_OS_SIM_SPEC },                      \
1315   { "cpp_os_freebsd",           CPP_OS_FREEBSD_SPEC },                  \
1316   { "cpp_os_gnu",               CPP_OS_GNU_SPEC },                      \
1317   { "cpp_os_linux",             CPP_OS_LINUX_SPEC },                    \
1318   { "cpp_os_netbsd",            CPP_OS_NETBSD_SPEC },                   \
1319   { "cpp_os_openbsd",           CPP_OS_OPENBSD_SPEC },                  \
1320   { "cpp_os_windiss",           CPP_OS_WINDISS_SPEC },                  \
1321   { "cpp_os_default",           CPP_OS_DEFAULT_SPEC },                  \
1322   { "fbsd_dynamic_linker",      FBSD_DYNAMIC_LINKER },                  \
1323   SUBSUBTARGET_EXTRA_SPECS
1324
1325 #define SUBSUBTARGET_EXTRA_SPECS
1326
1327 /* Define this macro as a C expression for the initializer of an
1328    array of string to tell the driver program which options are
1329    defaults for this target and thus do not need to be handled
1330    specially when using `MULTILIB_OPTIONS'.
1331
1332    Do not define this macro if `MULTILIB_OPTIONS' is not defined in
1333    the target makefile fragment or if none of the options listed in
1334    `MULTILIB_OPTIONS' are set by default.  *Note Target Fragment::.  */
1335
1336 #define MULTILIB_DEFAULTS { "mbig", "mcall-sysv" }
1337
1338 /* Define this macro if the code for function profiling should come
1339    before the function prologue.  Normally, the profiling code comes
1340    after.  */
1341 #define PROFILE_BEFORE_PROLOGUE 1
1342
1343 /* Function name to call to do profiling.  */
1344 #define RS6000_MCOUNT "_mcount"
1345
1346 /* Define this macro (to a value of 1) if you want to support the
1347    Win32 style pragmas #pragma pack(push,<n>)' and #pragma
1348    pack(pop)'.  The pack(push,<n>) pragma specifies the maximum
1349    alignment (in bytes) of fields within a structure, in much the
1350    same way as the __aligned__' and __packed__' __attribute__'s
1351    do.  A pack value of zero resets the behavior to the default.
1352    Successive invocations of this pragma cause the previous values to
1353    be stacked, so that invocations of #pragma pack(pop)' will return
1354    to the previous value.  */
1355
1356 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
1357
1358 /* Select a format to encode pointers in exception handling data.  CODE
1359    is 0 for data, 1 for code labels, 2 for function pointers.  GLOBAL is
1360    true if the symbol may be affected by dynamic relocations.  */
1361 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)                            \
1362   ((flag_pic || TARGET_RELOCATABLE)                                          \
1363    ? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel | DW_EH_PE_sdata4) \
1364    : DW_EH_PE_absptr)
1365
1366 #define TARGET_ASM_EXCEPTION_SECTION readonly_data_section
1367
1368 #define DOUBLE_INT_ASM_OP "\t.quad\t"
1369
1370 /* Generate entries in .fixup for relocatable addresses.  */
1371 #define RELOCATABLE_NEEDS_FIXUP 1