[thirdparty/gcc.git] / gcc / config / i386 / sol2.h

/* Target definitions for GCC for Intel 80386 running Solaris 2
   Copyright (C) 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
   2004, 2007 Free Software Foundation, Inc.
   Contributed by Fred Fish (fnf@cygnus.com).

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 3, 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 COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */

/* The Solaris 2.0 x86 linker botches alignment of code sections.
   It tries to align to a 16 byte boundary by padding with 0x00000090
   ints, rather than 0x90 bytes (nop).  This generates trash in the
   ".init" section since the contribution from crtbegin.o is only 7
   bytes.  The linker pads it to 16 bytes with a single 0x90 byte, and
   two 0x00000090 ints, which generates a segmentation violation when
   executed.  This macro forces the assembler to do the padding, since
   it knows what it is doing.  */
#define FORCE_CODE_SECTION_ALIGN  asm(ALIGN_ASM_OP "16");

/* Old versions of the Solaris assembler can not handle the difference of
   labels in different sections, so force DW_EH_PE_datarel.  */
#undef ASM_PREFERRED_EH_DATA_FORMAT
#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)			\
  (flag_pic ? ((GLOBAL ? DW_EH_PE_indirect : 0)				\
	       | (TARGET_64BIT ? DW_EH_PE_pcrel | DW_EH_PE_sdata4	\
		  : DW_EH_PE_datarel))					\
   : DW_EH_PE_absptr)

/* The Solaris linker will not merge a read-only .eh_frame section
   with a read-write .eh_frame section.  None of the encodings used
   with non-PIC code require runtime relocations.  In 64-bit mode,
   since there is no backwards compatibility issue, we use a read-only
   section for .eh_frame.  In 32-bit mode, we use a writable .eh_frame
   section in order to be compatible with G++ for Solaris x86.  */
#undef EH_TABLES_CAN_BE_READ_ONLY
#define EH_TABLES_CAN_BE_READ_ONLY (TARGET_64BIT)

/* Solaris 2/Intel as chokes on #line directives.  */
#undef CPP_SPEC
#define CPP_SPEC "%{,assembler-with-cpp:-P} %(cpp_subtarget)"

/* FIXME: Removed -K PIC from generic Solaris 2 ASM_SPEC: the native assembler
   gives many warnings: R_386_32 relocation is used for symbol ".text".  */
#undef ASM_SPEC
#define ASM_SPEC "\
%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s \
%(asm_cpu) \
"

#define ASM_CPU_SPEC ""
 
#undef SUBTARGET_EXTRA_SPECS
#define SUBTARGET_EXTRA_SPECS \
  { "cpp_subtarget",	CPP_SUBTARGET_SPEC },	\
  { "asm_cpu",		ASM_CPU_SPEC },		\
  { "startfile_arch",	STARTFILE_ARCH_SPEC },	\
  { "link_arch",	LINK_ARCH_SPEC }

#undef LOCAL_LABEL_PREFIX
#define LOCAL_LABEL_PREFIX "."

/* The 32-bit Solaris assembler does not support .quad.  Do not use it.  */
#ifndef TARGET_BI_ARCH
#undef ASM_QUAD
#endif

/* The Solaris assembler wants a .local for non-exported aliases.  */
#define ASM_OUTPUT_DEF_FROM_DECLS(FILE, DECL, TARGET)	\
  do {							\
    const char *declname =				\
      IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL));	\
    ASM_OUTPUT_DEF ((FILE), declname,			\
		    IDENTIFIER_POINTER (TARGET));	\
    if (! TREE_PUBLIC (DECL))				\
      {							\
	fprintf ((FILE), "%s", LOCAL_ASM_OP);		\
	assemble_name ((FILE), declname);		\
	fprintf ((FILE), "\n");				\
      }							\
  } while (0)

/* Solaris-specific #pragmas are implemented on top of attributes.  Hook in
   the bits from config/sol2.c.  */
#define SUBTARGET_INSERT_ATTRIBUTES solaris_insert_attributes
#define SUBTARGET_ATTRIBUTE_TABLE SOLARIS_ATTRIBUTE_TABLE

/* Output a simple call for .init/.fini.  */
#define ASM_OUTPUT_CALL(FILE, FN)				\
  do								\
    {								\
      fprintf (FILE, "\tcall\t");				\
      print_operand (FILE, XEXP (DECL_RTL (FN), 0), 'P');	\
      fprintf (FILE, "\n");					\
    }								\
  while (0)

/* We do not need NT_VERSION notes.  */
#undef X86_FILE_START_VERSION_DIRECTIVE
#define X86_FILE_START_VERSION_DIRECTIVE false
Commit	Line	Data
a805d35f	1	/* Target definitions for GCC for Intel 80386 running Solaris 2
caec2cfc	2	Copyright (C) 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
2f83c7d6	3	2004, 2007 Free Software Foundation, Inc.
7d4ea832	4	Contributed by Fred Fish (fnf@cygnus.com).
266f9541	5
a805d35f	6	This file is part of GCC.
266f9541	7
a805d35f	8	GCC is free software; you can redistribute it and/or modify
266f9541	9	it under the terms of the GNU General Public License as published by
2f83c7d6	10	the Free Software Foundation; either version 3, or (at your option)
266f9541 JW	11	any later version.
266f9541 JW	12
a805d35f	13	GCC is distributed in the hope that it will be useful,
266f9541 JW	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
2f83c7d6 NC	19	along with GCC; see the file COPYING3. If not see
2f83c7d6 NC	20	<http://www.gnu.org/licenses/>. */
266f9541	21
266f9541 JW	22	/* The Solaris 2.0 x86 linker botches alignment of code sections.
	23	It tries to align to a 16 byte boundary by padding with 0x00000090
	24	ints, rather than 0x90 bytes (nop). This generates trash in the
	25	".init" section since the contribution from crtbegin.o is only 7
	26	bytes. The linker pads it to 16 bytes with a single 0x90 byte, and
	27	two 0x00000090 ints, which generates a segmentation violation when
	28	executed. This macro forces the assembler to do the padding, since
892a2d68	29	it knows what it is doing. */
cea3bd3e	30	#define FORCE_CODE_SECTION_ALIGN asm(ALIGN_ASM_OP "16");
ebf3718c	31
a8e68029 DJ	32	/* Old versions of the Solaris assembler can not handle the difference of
a8e68029 DJ	33	labels in different sections, so force DW_EH_PE_datarel. */
c1911346 RO	34	#undef ASM_PREFERRED_EH_DATA_FORMAT
c1911346 RO	35	#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
a8e68029 DJ	36	(flag_pic ? ((GLOBAL ? DW_EH_PE_indirect : 0) \
	37	\| (TARGET_64BIT ? DW_EH_PE_pcrel \| DW_EH_PE_sdata4 \
	38	: DW_EH_PE_datarel)) \
c1911346 RO	39	: DW_EH_PE_absptr)
c1911346 RO	40
1a35e62d MM	41	/* The Solaris linker will not merge a read-only .eh_frame section
	42	with a read-write .eh_frame section. None of the encodings used
	43	with non-PIC code require runtime relocations. In 64-bit mode,
	44	since there is no backwards compatibility issue, we use a read-only
	45	section for .eh_frame. In 32-bit mode, we use a writable .eh_frame
	46	section in order to be compatible with G++ for Solaris x86. */
	47	#undef EH_TABLES_CAN_BE_READ_ONLY
	48	#define EH_TABLES_CAN_BE_READ_ONLY (TARGET_64BIT)
	49
5e3caf26	50	/* Solaris 2/Intel as chokes on #line directives. */
ebf3718c	51	#undef CPP_SPEC
48137d59	52	#define CPP_SPEC "%{,assembler-with-cpp:-P} %(cpp_subtarget)"
68d69835	53
8433a25e RO	54	/* FIXME: Removed -K PIC from generic Solaris 2 ASM_SPEC: the native assembler
	55	gives many warnings: R_386_32 relocation is used for symbol ".text". */
	56	#undef ASM_SPEC
	57	#define ASM_SPEC "\
	58	%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,} %{Wa,:%*} -s \
	59	%(asm_cpu) \
	60	"
	61
	62	#define ASM_CPU_SPEC ""
	63
	64	#undef SUBTARGET_EXTRA_SPECS
	65	#define SUBTARGET_EXTRA_SPECS \
	66	{ "cpp_subtarget", CPP_SUBTARGET_SPEC }, \
	67	{ "asm_cpu", ASM_CPU_SPEC }, \
	68	{ "startfile_arch", STARTFILE_ARCH_SPEC }, \
	69	{ "link_arch", LINK_ARCH_SPEC }
62481348 JC	70
	71	#undef LOCAL_LABEL_PREFIX
	72	#define LOCAL_LABEL_PREFIX "."
60ffc997	73
a8e68029 DJ	74	/* The 32-bit Solaris assembler does not support .quad. Do not use it. */
a8e68029 DJ	75	#ifndef TARGET_BI_ARCH
60ffc997	76	#undef ASM_QUAD
a8e68029	77	#endif
25178498 JJ	78
	79	/* The Solaris assembler wants a .local for non-exported aliases. */
	80	#define ASM_OUTPUT_DEF_FROM_DECLS(FILE, DECL, TARGET) \
	81	do { \
	82	const char *declname = \
	83	IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL)); \
	84	ASM_OUTPUT_DEF ((FILE), declname, \
	85	IDENTIFIER_POINTER (TARGET)); \
	86	if (! TREE_PUBLIC (DECL)) \
	87	{ \
	88	fprintf ((FILE), "%s", LOCAL_ASM_OP); \
	89	assemble_name ((FILE), declname); \
	90	fprintf ((FILE), "\n"); \
	91	} \
	92	} while (0)
07a43492 DJ	93
	94	/* Solaris-specific #pragmas are implemented on top of attributes. Hook in
	95	the bits from config/sol2.c. */
	96	#define SUBTARGET_INSERT_ATTRIBUTES solaris_insert_attributes
	97	#define SUBTARGET_ATTRIBUTE_TABLE SOLARIS_ATTRIBUTE_TABLE
	98
	99	/* Output a simple call for .init/.fini. */
dbdd0cf3 MM	100	#define ASM_OUTPUT_CALL(FILE, FN) \
	101	do \
	102	{ \
	103	fprintf (FILE, "\tcall\t"); \
	104	print_operand (FILE, XEXP (DECL_RTL (FN), 0), 'P'); \
	105	fprintf (FILE, "\n"); \
	106	} \
	107	while (0)
81e4cf35 MM	108
	109	/* We do not need NT_VERSION notes. */
	110	#undef X86_FILE_START_VERSION_DIRECTIVE
	111	#define X86_FILE_START_VERSION_DIRECTIVE false