gcc/config/i386/sol2.h - gcc - Git at Google

 /* Target definitions for GCC for Intel 80386 running Solaris 2
    Copyright (C) 1993-2021 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/>.  */

 #define SUBTARGET_OPTIMIZATION_OPTIONS				\
   { OPT_LEVELS_1_PLUS, OPT_momit_leaf_frame_pointer, NULL, 1 }

 /* 32-bit Solaris/x86 only guarantees 4-byte stack alignment as required by
    the i386 psABI, so realign it as necessary for SSE instructions.  */
 #undef STACK_REALIGN_DEFAULT
 #define STACK_REALIGN_DEFAULT (TARGET_64BIT ? 0 : 1)

 /* Old versions of the Solaris assembler cannot handle the difference of
    labels in different sections, so force DW_EH_PE_datarel if so.  */
 #ifndef HAVE_AS_IX86_DIFF_SECT_DELTA
 #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)
 #endif

 /* 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)

 /* Follow Sun requirements for TLS code sequences and use Sun assembler TLS
    syntax.  */
 #undef TARGET_SUN_TLS
 #define TARGET_SUN_TLS 1

 #undef CPP_SPEC
 #define CPP_SPEC "%(cpp_subtarget)"

 #undef CC1_SPEC
 #define CC1_SPEC "%(cc1_cpu) " ASAN_CC1_SPEC \
   " %{mx32:%e-mx32 is not supported on Solaris}"

 /* GNU as understands --32 and --64, but the native Solaris
    assembler requires -xarch=generic or -xarch=generic64 instead.  */
 #ifdef USE_GAS
 #define ASM_CPU32_DEFAULT_SPEC "--32"
 #define ASM_CPU64_DEFAULT_SPEC "--64"
 #else
 #define ASM_CPU32_DEFAULT_SPEC "-xarch=generic"
 #define ASM_CPU64_DEFAULT_SPEC "-xarch=generic64"
 #endif

 /* Since Studio 12.6, as needs -xbrace_comment=no so its AVX512 syntax is
    fully compatible with gas.  */
 #ifdef HAVE_AS_XBRACE_COMMENT_OPTION
 #define ASM_XBRACE_COMMENT_SPEC "-xbrace_comment=no"
 #else
 #define ASM_XBRACE_COMMENT_SPEC ""
 #endif

 #undef ASM_CPU_SPEC
 #define ASM_CPU_SPEC "%(asm_cpu_default) " ASM_XBRACE_COMMENT_SPEC

 /* Don't include ASM_PIC_SPEC.  While the Solaris 10+ assembler accepts -K PIC,
    it gives many warnings:
 	Absolute relocation is used for symbol "<symbol>"
    GNU as doesn't recognize -K at all.  */
 #undef ASM_SPEC
 #define ASM_SPEC ASM_SPEC_BASE

 #define DEFAULT_ARCH32_P !TARGET_64BIT_DEFAULT

 #define ARCH64_SUBDIR "amd64"

 #ifdef USE_GLD
 /* Since binutils 2.21, GNU ld supports new *_sol2 emulations to strictly
    follow the Solaris 2 ABI.  Prefer them if present.  */
 #ifdef HAVE_LD_SOL2_EMULATION
 #define ARCH32_EMULATION "elf_i386_sol2"
 #define ARCH64_EMULATION "elf_x86_64_sol2"
 #else
 #define ARCH32_EMULATION "elf_i386"
 #define ARCH64_EMULATION "elf_x86_64"
 #endif
 #endif

 #define ENDFILE_ARCH_SPEC \
   "%{mpc32:crtprec32.o%s} \
    %{mpc64:crtprec64.o%s} \
    %{mpc80:crtprec80.o%s}"

 #define SUBTARGET_CPU_EXTRA_SPECS \
   { "cpp_subtarget",	 CPP_SUBTARGET_SPEC },		\
   { "asm_cpu",		 ASM_CPU_SPEC },		\
   { "asm_cpu_default",	 ASM_CPU_DEFAULT_SPEC },	\

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

 #undef LOCAL_LABEL_PREFIX
 #define LOCAL_LABEL_PREFIX "."

 /* The 32-bit Solaris assembler does not support .quad.  Do not use it.  */
 #ifndef HAVE_AS_IX86_QUAD
 #undef ASM_QUAD
 #endif

 /* The native Solaris assembler can't calculate the difference between
    symbols in different sections, which causes problems for -fPIC jump
    tables in .rodata.  */
 #ifndef HAVE_AS_IX86_DIFF_SECT_DELTA
 #undef JUMP_TABLES_IN_TEXT_SECTION
 #define JUMP_TABLES_IN_TEXT_SECTION 1

 /* The native Solaris assembler cannot handle the SYMBOL-. syntax, but
    requires SYMBOL@rel/@rel64 instead.  */
 #define ASM_OUTPUT_DWARF_PCREL(FILE, SIZE, LABEL)	\
   do {							\
     fputs (integer_asm_op (SIZE, FALSE), FILE);		\
     assemble_name (FILE, LABEL);			\
     fputs (SIZE == 8 ? "@rel64" : "@rel", FILE);	\
   } while (0)
 #endif

 /* The Solaris assembler wants a .local for non-exported aliases.  */
 #define ASM_OUTPUT_DEF_FROM_DECLS(FILE, DECL, TARGET)	\
   do {							\
     tree id = DECL_ASSEMBLER_NAME (DECL);		\
     ultimate_transparent_alias_target (&id);		\
     const char *declname = IDENTIFIER_POINTER (id);	\
     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)

 #ifndef USE_GAS
 /* The Sun assembler uses .tcomm for TLS common sections.  */
 #define TLS_COMMON_ASM_OP ".tcomm"

 /* Similar to the Sun assembler on SPARC, the native assembler requires
    TLS objects to be declared as @tls_obj (not @tls_object).  Unlike SPARC,
    gas doesn't understand this variant.  */
 #undef  ASM_DECLARE_OBJECT_NAME
 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)		\
   do								\
     {								\
       HOST_WIDE_INT size;					\
 								\
       if (targetm.have_tls && DECL_THREAD_LOCAL_P (DECL))	\
 	ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "tls_obj");	\
       else							\
 	ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");	\
 								\
       size_directive_output = 0;				\
       if (!flag_inhibit_size_directive				\
 	  && (DECL) && DECL_SIZE (DECL))			\
 	{							\
 	  size_directive_output = 1;				\
 	  size = int_size_in_bytes (TREE_TYPE (DECL));		\
 	  ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, size);		\
 	}							\
 								\
       ASM_OUTPUT_LABEL (FILE, NAME);				\
     }								\
   while (0)
 #endif /* !USE_GAS */

 /* As in sparc/sol2.h, override the default from i386/x86-64.h to work
    around Sun as TLS bug.  */
 #undef  ASM_OUTPUT_ALIGNED_DECL_COMMON
 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN)	\
   do									\
     {									\
       if (TARGET_SUN_TLS						\
 	  && in_section							\
 	  && ((in_section->common.flags & SECTION_TLS) == SECTION_TLS))	\
 	switch_to_section (bss_section);				\
       x86_elf_aligned_decl_common (FILE, DECL, NAME, SIZE, ALIGN);	\
     }									\
   while  (0)

 /* Output a simple call for .init/.fini.  */
 #define ASM_OUTPUT_CALL(FILE, FN)				\
   do								\
     {								\
       fprintf (FILE, "\tcall\t");				\
       ix86_print_operand (FILE, XEXP (DECL_RTL (FN), 0), 'P');	\
       fprintf (FILE, "\n");					\
     }								\
   while (0)

 #undef TARGET_ASM_NAMED_SECTION
 #define TARGET_ASM_NAMED_SECTION i386_solaris_elf_named_section

 /* Sun as requires "h" flag for large sections, GNU as can do without, but
    accepts "l".  */
 #ifdef USE_GAS
 #define MACH_DEP_SECTION_ASM_FLAG 'l'
 #else
 #define MACH_DEP_SECTION_ASM_FLAG 'h'
 #endif

 #ifndef USE_GAS
 /* Emit COMDAT group signature symbols for Sun as.  */
 #undef TARGET_ASM_FILE_END
 #define TARGET_ASM_FILE_END solaris_file_end
 #endif

 /* Unlike GNU ld, Sun ld doesn't coalesce .ctors.N/.dtors.N sections, so
    inhibit their creation.  Also cf. sparc/sysv4.h.  */
 #ifndef USE_GLD
 #define CTORS_SECTION_ASM_OP	"\t.section\t.ctors, \"aw\""
 #define DTORS_SECTION_ASM_OP	"\t.section\t.dtors, \"aw\""
 #endif

 #ifndef USE_GAS
 #define LARGECOMM_SECTION_ASM_OP "\t.lbcomm\t"
 #endif

 /* -fsanitize=address is currently only supported for 32-bit.  */
 #define ASAN_REJECT_SPEC \
   DEF_ARCH64_SPEC("%e-fsanitize=address is not supported in this configuration")

 #undef NO_PROFILE_COUNTERS

 #undef MCOUNT_NAME
 #define MCOUNT_NAME "_mcount"

 /* We do not need NT_VERSION notes.  */
 #undef X86_FILE_START_VERSION_DIRECTIVE
 #define X86_FILE_START_VERSION_DIRECTIVE false
	/* Target definitions for GCC for Intel 80386 running Solaris 2
	Copyright (C) 1993-2021 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/>. */

	#define SUBTARGET_OPTIMIZATION_OPTIONS \
	{ OPT_LEVELS_1_PLUS, OPT_momit_leaf_frame_pointer, NULL, 1 }

	/* 32-bit Solaris/x86 only guarantees 4-byte stack alignment as required by
	the i386 psABI, so realign it as necessary for SSE instructions. */
	#undef STACK_REALIGN_DEFAULT
	#define STACK_REALIGN_DEFAULT (TARGET_64BIT ? 0 : 1)

	/* Old versions of the Solaris assembler cannot handle the difference of
	labels in different sections, so force DW_EH_PE_datarel if so. */
	#ifndef HAVE_AS_IX86_DIFF_SECT_DELTA
	#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)
	#endif

	/* 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)

	/* Follow Sun requirements for TLS code sequences and use Sun assembler TLS
	syntax. */
	#undef TARGET_SUN_TLS
	#define TARGET_SUN_TLS 1

	#undef CPP_SPEC
	#define CPP_SPEC "%(cpp_subtarget)"

	#undef CC1_SPEC
	#define CC1_SPEC "%(cc1_cpu) " ASAN_CC1_SPEC \
	" %{mx32:%e-mx32 is not supported on Solaris}"

	/* GNU as understands --32 and --64, but the native Solaris
	assembler requires -xarch=generic or -xarch=generic64 instead. */
	#ifdef USE_GAS
	#define ASM_CPU32_DEFAULT_SPEC "--32"
	#define ASM_CPU64_DEFAULT_SPEC "--64"
	#else
	#define ASM_CPU32_DEFAULT_SPEC "-xarch=generic"
	#define ASM_CPU64_DEFAULT_SPEC "-xarch=generic64"
	#endif

	/* Since Studio 12.6, as needs -xbrace_comment=no so its AVX512 syntax is
	fully compatible with gas. */
	#ifdef HAVE_AS_XBRACE_COMMENT_OPTION
	#define ASM_XBRACE_COMMENT_SPEC "-xbrace_comment=no"
	#else
	#define ASM_XBRACE_COMMENT_SPEC ""
	#endif

	#undef ASM_CPU_SPEC
	#define ASM_CPU_SPEC "%(asm_cpu_default) " ASM_XBRACE_COMMENT_SPEC

	/* Don't include ASM_PIC_SPEC. While the Solaris 10+ assembler accepts -K PIC,
	it gives many warnings:
	Absolute relocation is used for symbol "<symbol>"
	GNU as doesn't recognize -K at all. */
	#undef ASM_SPEC
	#define ASM_SPEC ASM_SPEC_BASE

	#define DEFAULT_ARCH32_P !TARGET_64BIT_DEFAULT

	#define ARCH64_SUBDIR "amd64"

	#ifdef USE_GLD
	/* Since binutils 2.21, GNU ld supports new *_sol2 emulations to strictly
	follow the Solaris 2 ABI. Prefer them if present. */
	#ifdef HAVE_LD_SOL2_EMULATION
	#define ARCH32_EMULATION "elf_i386_sol2"
	#define ARCH64_EMULATION "elf_x86_64_sol2"
	#else
	#define ARCH32_EMULATION "elf_i386"
	#define ARCH64_EMULATION "elf_x86_64"
	#endif
	#endif

	#define ENDFILE_ARCH_SPEC \
	"%{mpc32:crtprec32.o%s} \
	%{mpc64:crtprec64.o%s} \
	%{mpc80:crtprec80.o%s}"

	#define SUBTARGET_CPU_EXTRA_SPECS \
	{ "cpp_subtarget", CPP_SUBTARGET_SPEC }, \
	{ "asm_cpu", ASM_CPU_SPEC }, \
	{ "asm_cpu_default", ASM_CPU_DEFAULT_SPEC }, \

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

	#undef LOCAL_LABEL_PREFIX
	#define LOCAL_LABEL_PREFIX "."

	/* The 32-bit Solaris assembler does not support .quad. Do not use it. */
	#ifndef HAVE_AS_IX86_QUAD
	#undef ASM_QUAD
	#endif

	/* The native Solaris assembler can't calculate the difference between
	symbols in different sections, which causes problems for -fPIC jump
	tables in .rodata. */
	#ifndef HAVE_AS_IX86_DIFF_SECT_DELTA
	#undef JUMP_TABLES_IN_TEXT_SECTION
	#define JUMP_TABLES_IN_TEXT_SECTION 1

	/* The native Solaris assembler cannot handle the SYMBOL-. syntax, but
	requires SYMBOL@rel/@rel64 instead. */
	#define ASM_OUTPUT_DWARF_PCREL(FILE, SIZE, LABEL) \
	do { \
	fputs (integer_asm_op (SIZE, FALSE), FILE); \
	assemble_name (FILE, LABEL); \
	fputs (SIZE == 8 ? "@rel64" : "@rel", FILE); \
	} while (0)
	#endif

	/* The Solaris assembler wants a .local for non-exported aliases. */
	#define ASM_OUTPUT_DEF_FROM_DECLS(FILE, DECL, TARGET) \
	do { \
	tree id = DECL_ASSEMBLER_NAME (DECL); \
	ultimate_transparent_alias_target (&id); \
	const char *declname = IDENTIFIER_POINTER (id); \
	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)

	#ifndef USE_GAS
	/* The Sun assembler uses .tcomm for TLS common sections. */
	#define TLS_COMMON_ASM_OP ".tcomm"

	/* Similar to the Sun assembler on SPARC, the native assembler requires
	TLS objects to be declared as @tls_obj (not @tls_object). Unlike SPARC,
	gas doesn't understand this variant. */
	#undef ASM_DECLARE_OBJECT_NAME
	#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
	do \
	{ \
	HOST_WIDE_INT size; \
	\
	if (targetm.have_tls && DECL_THREAD_LOCAL_P (DECL)) \
	ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "tls_obj"); \
	else \
	ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \
	\
	size_directive_output = 0; \
	if (!flag_inhibit_size_directive \
	&& (DECL) && DECL_SIZE (DECL)) \
	{ \
	size_directive_output = 1; \
	size = int_size_in_bytes (TREE_TYPE (DECL)); \
	ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, size); \
	} \
	\
	ASM_OUTPUT_LABEL (FILE, NAME); \
	} \
	while (0)
	#endif /* !USE_GAS */

	/* As in sparc/sol2.h, override the default from i386/x86-64.h to work
	around Sun as TLS bug. */
	#undef ASM_OUTPUT_ALIGNED_DECL_COMMON
	#define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \
	do \
	{ \
	if (TARGET_SUN_TLS \
	&& in_section \
	&& ((in_section->common.flags & SECTION_TLS) == SECTION_TLS)) \
	switch_to_section (bss_section); \
	x86_elf_aligned_decl_common (FILE, DECL, NAME, SIZE, ALIGN); \
	} \
	while (0)

	/* Output a simple call for .init/.fini. */
	#define ASM_OUTPUT_CALL(FILE, FN) \
	do \
	{ \
	fprintf (FILE, "\tcall\t"); \
	ix86_print_operand (FILE, XEXP (DECL_RTL (FN), 0), 'P'); \
	fprintf (FILE, "\n"); \
	} \
	while (0)

	#undef TARGET_ASM_NAMED_SECTION
	#define TARGET_ASM_NAMED_SECTION i386_solaris_elf_named_section

	/* Sun as requires "h" flag for large sections, GNU as can do without, but
	accepts "l". */
	#ifdef USE_GAS
	#define MACH_DEP_SECTION_ASM_FLAG 'l'
	#else
	#define MACH_DEP_SECTION_ASM_FLAG 'h'
	#endif

	#ifndef USE_GAS
	/* Emit COMDAT group signature symbols for Sun as. */
	#undef TARGET_ASM_FILE_END
	#define TARGET_ASM_FILE_END solaris_file_end
	#endif

	/* Unlike GNU ld, Sun ld doesn't coalesce .ctors.N/.dtors.N sections, so
	inhibit their creation. Also cf. sparc/sysv4.h. */
	#ifndef USE_GLD
	#define CTORS_SECTION_ASM_OP "\t.section\t.ctors, \"aw\""
	#define DTORS_SECTION_ASM_OP "\t.section\t.dtors, \"aw\""
	#endif

	#ifndef USE_GAS
	#define LARGECOMM_SECTION_ASM_OP "\t.lbcomm\t"
	#endif

	/* -fsanitize=address is currently only supported for 32-bit. */
	#define ASAN_REJECT_SPEC \
	DEF_ARCH64_SPEC("%e-fsanitize=address is not supported in this configuration")

	#undef NO_PROFILE_COUNTERS

	#undef MCOUNT_NAME
	#define MCOUNT_NAME "_mcount"

	/* We do not need NT_VERSION notes. */
	#undef X86_FILE_START_VERSION_DIRECTIVE
	#define X86_FILE_START_VERSION_DIRECTIVE false