[gcc.git] / gcc / config / sol2.h

/* Operating system specific defines to be used when targeting GCC for any
   Solaris 2 system.
   Copyright 2002, 2003, 2004 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING.  If not, write to
the Free Software Foundation, 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.  */

/* We use stabs-in-elf for debugging, because that is what the native
   toolchain uses.  */
#undef PREFERRED_DEBUGGING_TYPE
#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG

/* Solaris 2 (at least as of 2.5.1) uses a 32-bit wchar_t.  */
#undef WCHAR_TYPE
#define WCHAR_TYPE "long int"

#undef WCHAR_TYPE_SIZE
#define WCHAR_TYPE_SIZE BITS_PER_WORD

/* Solaris 2 uses a wint_t different from the default. This is required
   by the SCD 2.4.1, p. 6-83, Figure 6-66.  */
#undef	WINT_TYPE
#define	WINT_TYPE "long int"

#undef	WINT_TYPE_SIZE
#define	WINT_TYPE_SIZE BITS_PER_WORD

#define TARGET_HANDLE_PRAGMA_REDEFINE_EXTNAME 1

/* ??? Note: in order for -compat-bsd to work fully,
   we must somehow arrange to fixincludes /usr/ucbinclude
   and put the result in $(libsubdir)/ucbinclude.  */

#undef CPP_SUBTARGET_SPEC
#define CPP_SUBTARGET_SPEC "\
%{pthreads:-D_REENTRANT -D_PTHREADS} \
%{!pthreads:%{threads:-D_REENTRANT -D_SOLARIS_THREADS}} \
%{compat-bsd:-iwithprefixbefore ucbinclude -I/usr/ucbinclude} \
"

/* Names to predefine in the preprocessor for this target machine.  */
#define TARGET_SUB_OS_CPP_BUILTINS()
#define TARGET_OS_CPP_BUILTINS()			\
    do {						\
	builtin_define_std ("unix");			\
	builtin_define_std ("sun");			\
	builtin_define ("__svr4__");			\
	builtin_define ("__SVR4");			\
	builtin_assert ("system=unix");			\
	builtin_assert ("system=svr4");			\
	/* For C++ we need to add some additional macro	\
	   definitions required by the C++ standard	\
	   library.  */					\
	if (c_dialect_cxx ())				\
	  {						\
	    builtin_define ("_XOPEN_SOURCE=500");	\
	    builtin_define ("_LARGEFILE_SOURCE=1");	\
	    builtin_define ("_LARGEFILE64_SOURCE=1");	\
	    builtin_define ("__EXTENSIONS__");		\
	  }						\
	if (flag_pic)					\
	  {						\
	    builtin_define ("__PIC__");			\
	    builtin_define ("__pic__");			\
	  }						\
	TARGET_SUB_OS_CPP_BUILTINS();			\
    } while (0)

/* The system headers under Solaris 2 are C++-aware since 2.0.  */
#define NO_IMPLICIT_EXTERN_C

/* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
   It's safe to pass -s always, even if -g is not used.  */
#undef ASM_SPEC
#define ASM_SPEC "\
%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s \
%{fpic|fpie|fPIC|fPIE:-K PIC} \
%(asm_cpu) \
"

/* We don't use the standard LIB_SPEC only because we don't yet support c++.  */
#undef LIB_SPEC
#define LIB_SPEC \
  "%{compat-bsd:-lucb -lsocket -lnsl -lelf -laio} \
   %{!shared:\
     %{!symbolic:\
       %{pthreads:-lpthread} \
       %{!pthreads:%{threads:-lthread}} \
       %{p|pg:-ldl} -lc}}"

#undef  ENDFILE_SPEC
#define ENDFILE_SPEC "crtend.o%s crtn.o%s"

/* We don't use the standard svr4 STARTFILE_SPEC because it's wrong for us.  */
#undef STARTFILE_SPEC
#define STARTFILE_SPEC "%{!shared: \
			 %{!symbolic: \
			  %{p:mcrt1.o%s} \
                          %{!p: \
	                    %{pg:gcrt1.o%s gmon.o%s} \
                            %{!pg:crt1.o%s}}}} \
			crti.o%s %(startfile_arch) \
			crtbegin.o%s"

#undef STARTFILE_ARCH32_SPEC
#define STARTFILE_ARCH32_SPEC "%{ansi:values-Xc.o%s} \
			    %{!ansi:values-Xa.o%s}"

#undef STARTFILE_ARCH_SPEC
#define STARTFILE_ARCH_SPEC STARTFILE_ARCH32_SPEC

#undef LINK_ARCH32_SPEC_BASE
#define LINK_ARCH32_SPEC_BASE \
  "%{G:-G} \
   %{YP,*} \
   %{R*} \
   %{compat-bsd: \
     %{!YP,*:%{p|pg:-Y P,/usr/ucblib:/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
             %{!p:%{!pg:-Y P,/usr/ucblib:/usr/ccs/lib:/usr/lib}}} \
             -R /usr/ucblib} \
   %{!compat-bsd: \
     %{!YP,*:%{p|pg:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
             %{!p:%{!pg:-Y P,/usr/ccs/lib:/usr/lib}}}}"

#undef LINK_ARCH32_SPEC
#define LINK_ARCH32_SPEC LINK_ARCH32_SPEC_BASE

#undef LINK_ARCH_SPEC
#define LINK_ARCH_SPEC LINK_ARCH32_SPEC

/* This should be the same as in svr4.h, except with -R added.  */
#undef  LINK_SPEC
#define LINK_SPEC \
  "%{h*} %{v:-V} \
   %{b} %{Wl,*:%*} \
   %{static:-dn -Bstatic} \
   %{shared:-G -dy %{!mimpure-text:-z text}} \
   %{symbolic:-Bsymbolic -G -dy -z text} \
   %(link_arch) \
   %{Qy:} %{!Qn:-Qy}"

/* The Solaris linker doesn't understand constructor priorities.  (The
   GNU linker does support constructor priorities, so GNU ld
   configuration files for Solaris override this setting.)  */
#undef SUPPORTS_INIT_PRIORITY
#define SUPPORTS_INIT_PRIORITY 0

/* This defines which switch letters take arguments.
   It is as in svr4.h but with -R added.  */
#undef SWITCH_TAKES_ARG
#define SWITCH_TAKES_ARG(CHAR) \
  (DEFAULT_SWITCH_TAKES_ARG(CHAR) \
   || (CHAR) == 'R' \
   || (CHAR) == 'h' \
   || (CHAR) == 'z')

#define STDC_0_IN_SYSTEM_HEADERS 1
\f
/*
 * Attempt to turn on access permissions for the stack.
 *
 * _SC_STACK_PROT is only defined for post 2.6, but we want this code
 * to run always.  2.6 can change the stack protection but has no way to
 * query it.
 *
 */

/* sys/mman.h is not present on some non-Solaris configurations
   that use sol2.h, so ENABLE_EXECUTE_STACK must use a magic
   number instead of the appropriate PROT_* flags.  */

#define ENABLE_EXECUTE_STACK					\
									\
/* #define STACK_PROT_RWX (PROT_READ | PROT_WRITE | PROT_EXEC) */	\
									\
static int need_enable_exec_stack;					\
									\
static void check_enabling(void) __attribute__ ((constructor));		\
static void check_enabling(void)					\
{									\
  extern long sysconf(int);						\
									\
  int prot = (int) sysconf(515 /* _SC_STACK_PROT */);			\
  if (prot != 7 /* STACK_PROT_RWX */)					\
    need_enable_exec_stack = 1;						\
}									\
									\
extern void __enable_execute_stack (void *);				\
void									\
__enable_execute_stack (void *addr)					\
{									\
  extern int mprotect(void *, size_t, int);				\
  if (!need_enable_exec_stack)						\
    return;								\
  else {								\
    long size = getpagesize ();						\
    long mask = ~(size-1);						\
    char *page = (char *) (((long) addr) & mask); 			\
    char *end  = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \
									\
    if (mprotect (page, end - page, 7 /* STACK_PROT_RWX */) < 0)	\
      perror ("mprotect of trampoline code");				\
  }									\
}

/* Support Solaris-specific format checking for cmn_err.  */
#define TARGET_N_FORMAT_TYPES 1
#define TARGET_FORMAT_TYPES solaris_format_types

/* #pragma init and #pragma fini are implemented on top of init and
   fini attributes.  */
#define SOLARIS_ATTRIBUTE_TABLE						\
  { "init",      0, 0, true,  false,  false, NULL },			\
  { "fini",      0, 0, true,  false,  false, NULL }

/* This is how to declare the size of a function.  For Solaris, we output
   any .init or .fini entries here.  */
#undef ASM_DECLARE_FUNCTION_SIZE
#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)		\
  do								\
    {								\
      if (!flag_inhibit_size_directive)				\
	ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);			\
      solaris_output_init_fini (FILE, DECL);			\
    }								\
  while (0)

/* Register the Solaris-specific #pragma directives.  */
#define REGISTER_TARGET_PRAGMAS() solaris_register_pragmas ()

extern GTY(()) tree solaris_pending_aligns;
extern GTY(()) tree solaris_pending_inits;
extern GTY(()) tree solaris_pending_finis;

/* Allow macro expansion in #pragma pack.  */
#define HANDLE_PRAGMA_PACK_WITH_EXPANSION
Commit	Line	Data
8433a25e RO	1	/* Operating system specific defines to be used when targeting GCC for any
8433a25e RO	2	Solaris 2 system.
07a43492	3	Copyright 2002, 2003, 2004 Free Software Foundation, Inc.
8433a25e	4
814499a4	5	This file is part of GCC.
8433a25e	6
814499a4	7	GCC is free software; you can redistribute it and/or modify
8433a25e RO	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2, or (at your option)
	10	any later version.
	11
814499a4	12	GCC is distributed in the hope that it will be useful,
8433a25e RO	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
814499a4	18	along with GCC; see the file COPYING. If not, write to
39d14dda KC	19	the Free Software Foundation, 51 Franklin Street, Fifth Floor,
39d14dda KC	20	Boston, MA 02110-1301, USA. */
8433a25e RO	21
	22	/* We use stabs-in-elf for debugging, because that is what the native
	23	toolchain uses. */
	24	#undef PREFERRED_DEBUGGING_TYPE
	25	#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
	26
	27	/* Solaris 2 (at least as of 2.5.1) uses a 32-bit wchar_t. */
	28	#undef WCHAR_TYPE
	29	#define WCHAR_TYPE "long int"
	30
	31	#undef WCHAR_TYPE_SIZE
	32	#define WCHAR_TYPE_SIZE BITS_PER_WORD
	33
	34	/* Solaris 2 uses a wint_t different from the default. This is required
	35	by the SCD 2.4.1, p. 6-83, Figure 6-66. */
	36	#undef WINT_TYPE
	37	#define WINT_TYPE "long int"
	38
	39	#undef WINT_TYPE_SIZE
	40	#define WINT_TYPE_SIZE BITS_PER_WORD
	41
84b8b0e0	42	#define TARGET_HANDLE_PRAGMA_REDEFINE_EXTNAME 1
8433a25e RO	43
	44	/* ??? Note: in order for -compat-bsd to work fully,
	45	we must somehow arrange to fixincludes /usr/ucbinclude
	46	and put the result in $(libsubdir)/ucbinclude. */
	47
	48	#undef CPP_SUBTARGET_SPEC
	49	#define CPP_SUBTARGET_SPEC "\
	50	%{pthreads:-D_REENTRANT -D_PTHREADS} \
	51	%{!pthreads:%{threads:-D_REENTRANT -D_SOLARIS_THREADS}} \
	52	%{compat-bsd:-iwithprefixbefore ucbinclude -I/usr/ucbinclude} \
	53	"
	54
	55	/* Names to predefine in the preprocessor for this target machine. */
6508bdd5	56	#define TARGET_SUB_OS_CPP_BUILTINS()
8433a25e RO	57	#define TARGET_OS_CPP_BUILTINS() \
	58	do { \
	59	builtin_define_std ("unix"); \
	60	builtin_define_std ("sun"); \
	61	builtin_define ("__svr4__"); \
	62	builtin_define ("__SVR4"); \
8433a25e RO	63	builtin_assert ("system=unix"); \
8433a25e RO	64	builtin_assert ("system=svr4"); \
6508bdd5	65	/* For C++ we need to add some additional macro \
8433a25e RO	66	definitions required by the C++ standard \
8433a25e RO	67	library. */ \
04df6730	68	if (c_dialect_cxx ()) \
8433a25e RO	69	{ \
	70	builtin_define ("_XOPEN_SOURCE=500"); \
	71	builtin_define ("_LARGEFILE_SOURCE=1"); \
	72	builtin_define ("_LARGEFILE64_SOURCE=1"); \
	73	builtin_define ("__EXTENSIONS__"); \
	74	} \
d3f2f8ae DJ	75	if (flag_pic) \
	76	{ \
	77	builtin_define ("__PIC__"); \
	78	builtin_define ("__pic__"); \
	79	} \
6508bdd5	80	TARGET_SUB_OS_CPP_BUILTINS(); \
8433a25e RO	81	} while (0)
8433a25e RO	82
b689848f	83	/* The system headers under Solaris 2 are C++-aware since 2.0. */
49fa0661 JM	84	#define NO_IMPLICIT_EXTERN_C
49fa0661 JM	85
8433a25e RO	86	/* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
	87	It's safe to pass -s always, even if -g is not used. */
	88	#undef ASM_SPEC
	89	#define ASM_SPEC "\
	90	%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,} %{Wa,:%*} -s \
24a4dd31	91	%{fpic\|fpie\|fPIC\|fPIE:-K PIC} \
8433a25e RO	92	%(asm_cpu) \
	93	"
	94
	95	/* We don't use the standard LIB_SPEC only because we don't yet support c++. */
	96	#undef LIB_SPEC
	97	#define LIB_SPEC \
	98	"%{compat-bsd:-lucb -lsocket -lnsl -lelf -laio} \
	99	%{!shared:\
	100	%{!symbolic:\
	101	%{pthreads:-lpthread} \
	102	%{!pthreads:%{threads:-lthread}} \
	103	%{p\|pg:-ldl} -lc}}"
	104
	105	#undef ENDFILE_SPEC
	106	#define ENDFILE_SPEC "crtend.o%s crtn.o%s"
	107
	108	/* We don't use the standard svr4 STARTFILE_SPEC because it's wrong for us. */
	109	#undef STARTFILE_SPEC
	110	#define STARTFILE_SPEC "%{!shared: \
	111	%{!symbolic: \
	112	%{p:mcrt1.o%s} \
	113	%{!p: \
	114	%{pg:gcrt1.o%s gmon.o%s} \
	115	%{!pg:crt1.o%s}}}} \
	116	crti.o%s %(startfile_arch) \
	117	crtbegin.o%s"
	118
	119	#undef STARTFILE_ARCH32_SPEC
	120	#define STARTFILE_ARCH32_SPEC "%{ansi:values-Xc.o%s} \
	121	%{!ansi:values-Xa.o%s}"
	122
	123	#undef STARTFILE_ARCH_SPEC
	124	#define STARTFILE_ARCH_SPEC STARTFILE_ARCH32_SPEC
	125
61aaea23 MM	126	#undef LINK_ARCH32_SPEC_BASE
61aaea23 MM	127	#define LINK_ARCH32_SPEC_BASE \
8433a25e RO	128	"%{G:-G} \
	129	%{YP,*} \
	130	%{R*} \
	131	%{compat-bsd: \
	132	%{!YP,*:%{p\|pg:-Y P,/usr/ucblib:/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
	133	%{!p:%{!pg:-Y P,/usr/ucblib:/usr/ccs/lib:/usr/lib}}} \
	134	-R /usr/ucblib} \
	135	%{!compat-bsd: \
	136	%{!YP,*:%{p\|pg:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
	137	%{!p:%{!pg:-Y P,/usr/ccs/lib:/usr/lib}}}}"
	138
61aaea23 MM	139	#undef LINK_ARCH32_SPEC
	140	#define LINK_ARCH32_SPEC LINK_ARCH32_SPEC_BASE
	141
8433a25e RO	142	#undef LINK_ARCH_SPEC
	143	#define LINK_ARCH_SPEC LINK_ARCH32_SPEC
	144
	145	/* This should be the same as in svr4.h, except with -R added. */
	146	#undef LINK_SPEC
	147	#define LINK_SPEC \
	148	"%{h*} %{v:-V} \
	149	%{b} %{Wl,:%} \
	150	%{static:-dn -Bstatic} \
	151	%{shared:-G -dy %{!mimpure-text:-z text}} \
	152	%{symbolic:-Bsymbolic -G -dy -z text} \
	153	%(link_arch) \
	154	%{Qy:} %{!Qn:-Qy}"
	155
6e70657a MM	156	/* The Solaris linker doesn't understand constructor priorities. (The
	157	GNU linker does support constructor priorities, so GNU ld
	158	configuration files for Solaris override this setting.) */
	159	#undef SUPPORTS_INIT_PRIORITY
	160	#define SUPPORTS_INIT_PRIORITY 0
	161
8433a25e RO	162	/* This defines which switch letters take arguments.
	163	It is as in svr4.h but with -R added. */
	164	#undef SWITCH_TAKES_ARG
	165	#define SWITCH_TAKES_ARG(CHAR) \
	166	(DEFAULT_SWITCH_TAKES_ARG(CHAR) \
	167	\|\| (CHAR) == 'R' \
	168	\|\| (CHAR) == 'h' \
	169	\|\| (CHAR) == 'z')
	170
	171	#define STDC_0_IN_SYSTEM_HEADERS 1
	172	\f
	173	/*
	174	* Attempt to turn on access permissions for the stack.
	175	*
8433a25e RO	176	* _SC_STACK_PROT is only defined for post 2.6, but we want this code
	177	* to run always. 2.6 can change the stack protection but has no way to
	178	* query it.
	179	*
	180	*/
	181
ca11c37c	182	/* sys/mman.h is not present on some non-Solaris configurations
e7a742ec	183	that use sol2.h, so ENABLE_EXECUTE_STACK must use a magic
ca11c37c	184	number instead of the appropriate PROT_* flags. */
8433a25e	185
e7a742ec	186	#define ENABLE_EXECUTE_STACK \
8433a25e RO	187	\
	188	/* #define STACK_PROT_RWX (PROT_READ \| PROT_WRITE \| PROT_EXEC) */ \
	189	\
	190	static int need_enable_exec_stack; \
	191	\
	192	static void check_enabling(void) __attribute__ ((constructor)); \
	193	static void check_enabling(void) \
	194	{ \
	195	extern long sysconf(int); \
	196	\
	197	int prot = (int) sysconf(515 /* _SC_STACK_PROT */); \
	198	if (prot != 7 /* STACK_PROT_RWX */) \
	199	need_enable_exec_stack = 1; \
	200	} \
	201	\
	202	extern void __enable_execute_stack (void *); \
	203	void \
d3157fb6	204	__enable_execute_stack (void *addr) \
8433a25e	205	{ \
84b8b0e0	206	extern int mprotect(void *, size_t, int); \
8433a25e RO	207	if (!need_enable_exec_stack) \
	208	return; \
	209	else { \
	210	long size = getpagesize (); \
	211	long mask = ~(size-1); \
	212	char page = (char ) (((long) addr) & mask); \
	213	char end = (char ) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \
	214	\
	215	if (mprotect (page, end - page, 7 /* STACK_PROT_RWX */) < 0) \
	216	perror ("mprotect of trampoline code"); \
	217	} \
	218	}
a2bec818	219
07a43492	220	/* Support Solaris-specific format checking for cmn_err. */
a2bec818 DJ	221	#define TARGET_N_FORMAT_TYPES 1
a2bec818 DJ	222	#define TARGET_FORMAT_TYPES solaris_format_types
07a43492 DJ	223
	224	/* #pragma init and #pragma fini are implemented on top of init and
	225	fini attributes. */
	226	#define SOLARIS_ATTRIBUTE_TABLE \
	227	{ "init", 0, 0, true, false, false, NULL }, \
	228	{ "fini", 0, 0, true, false, false, NULL }
	229
	230	/* This is how to declare the size of a function. For Solaris, we output
	231	any .init or .fini entries here. */
	232	#undef ASM_DECLARE_FUNCTION_SIZE
	233	#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
	234	do \
	235	{ \
	236	if (!flag_inhibit_size_directive) \
	237	ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME); \
	238	solaris_output_init_fini (FILE, DECL); \
	239	} \
	240	while (0)
	241
	242	/* Register the Solaris-specific #pragma directives. */
	243	#define REGISTER_TARGET_PRAGMAS() solaris_register_pragmas ()
	244
	245	extern GTY(()) tree solaris_pending_aligns;
	246	extern GTY(()) tree solaris_pending_inits;
	247	extern GTY(()) tree solaris_pending_finis;
b5b3e36a DJ	248
	249	/* Allow macro expansion in #pragma pack. */
	250	#define HANDLE_PRAGMA_PACK_WITH_EXPANSION