/* Definitions for ARM running Linux-based GNU systems using ELF
- Copyright (C) 1993, 1994, 1997, 1998, 1999 Free Software Foundation, Inc.
+ Copyright (C) 1993, 1994, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
+ 2005, 2006, 2007
+ Free Software Foundation, Inc.
Contributed by Philip Blundell <philb@gnu.org>
-This file is part of GNU CC.
+ This file is part of GCC.
-GNU CC 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 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.
-GNU CC 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.
+ 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 this program; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+ 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/>. */
+
+/* elfos.h should have already been included. Now just override
+ any conflicting definitions and add any extras. */
/* Run-time Target Specification. */
+#undef TARGET_VERSION
#define TARGET_VERSION fputs (" (ARM GNU/Linux with ELF)", stderr);
-/* We have libgcc2. */
-#define HAVE_ATEXIT
+#undef TARGET_DEFAULT_FLOAT_ABI
+#define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_HARD
-/* Default is to use APCS-32 mode. */
-#ifndef SUBTARGET_DEFAULT_APCS26
-#define TARGET_DEFAULT (ARM_FLAG_APCS_32 | ARM_FLAG_SHORT_BYTE)
-#define SUBTARGET_EXTRA_LINK_SPEC \
- " %{mapcs-26:-m elf32arm26} %{!mapcs-26:-m elf32arm}"
-#define SUBTARGET_EXTRA_ASM_SPEC \
- " %{mapcs-26:-mapcs-26} %(!mapcs-26:-mapcs-32}"
+/* TARGET_BIG_ENDIAN_DEFAULT is set in
+ config.gcc for big endian configurations. */
+#if TARGET_BIG_ENDIAN_DEFAULT
+#define TARGET_ENDIAN_DEFAULT MASK_BIG_END
+#define TARGET_ENDIAN_OPTION "mbig-endian"
+#define TARGET_LINKER_EMULATION "armelfb_linux"
+#else
+#define TARGET_ENDIAN_DEFAULT 0
+#define TARGET_ENDIAN_OPTION "mlittle-endian"
+#define TARGET_LINKER_EMULATION "armelf_linux"
#endif
-/* This was defined in linux.h. Define it here also. */
-#undef DEFAULT_VTABLE_THUNKS
-#define DEFAULT_VTABLE_THUNKS 1
+#undef TARGET_DEFAULT
+#define TARGET_DEFAULT (TARGET_ENDIAN_DEFAULT)
+
+#define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6
+
+#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION " -p"
-/* Handle #pragma weak and #pragma pack. */
-#define HANDLE_SYSV_PRAGMA
+#undef MULTILIB_DEFAULTS
+#define MULTILIB_DEFAULTS \
+ { "marm", "mlittle-endian", "mhard-float", "mno-thumb-interwork" }
/* Now we define the strings used to build the spec file. */
+#undef LIB_SPEC
#define LIB_SPEC \
- "%{shared: -lc} \
- %{!shared: %{pthread:-lpthread} \
- %{profile:-lc_p} %{!profile: -lc}}"
-
-#define LIBGCC_SPEC "%{msoft-float:-lfloat} -lgcc"
-
-/* Provide a STARTFILE_SPEC appropriate for GNU/Linux. Here we add
- the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
- provides part of the support for getting C++ file-scope static
- object constructed before entering `main'. */
-
-#define STARTFILE_SPEC \
- "%{!shared: \
- %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
- %{!p:%{profile:gcrt1.o%s} \
- %{!profile:crt1.o%s}}}} \
- crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
-
-/* Provide a ENDFILE_SPEC appropriate for GNU/Linux. Here we tack on
- the GNU/Linux magical crtend.o file (see crtstuff.c) which
- provides part of the support for getting C++ file-scope static
- object constructed before entering `main', followed by a normal
- GNU/Linux "finalizer" file, `crtn.o'. */
-
-#define ENDFILE_SPEC \
- "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
-
-#define LINK_SPEC "%{h*} %{version:-v} \
- %{b} %{Wl,*:%*} \
+ "%{pthread:-lpthread} \
+ %{shared:-lc} \
+ %{!shared:%{profile:-lc_p}%{!profile:-lc}}"
+
+#define LIBGCC_SPEC "%{msoft-float:-lfloat} %{mfloat-abi=soft*:-lfloat} -lgcc"
+
+#define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
+
+#define LINUX_TARGET_LINK_SPEC "%{h*} %{version:-v} \
+ %{b} \
%{static:-Bstatic} \
%{shared:-shared} \
%{symbolic:-Bsymbolic} \
%{rdynamic:-export-dynamic} \
- %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2} \
+ %{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER "} \
-X \
- %{mbig-endian:-EB}" \
+ %{mbig-endian:-EB} %{mlittle-endian:-EL}" \
SUBTARGET_EXTRA_LINK_SPEC
-#undef CPP_PREDEFINES
-#define CPP_PREDEFINES \
-"-Dunix -Darm -Dlinux -Asystem(unix) -Asystem(posix) -Acpu(arm) \
--Amachine(arm) -D__ELF__ -Darm_elf"
-
-#ifndef SUBTARGET_DEFAULT_APCS26
-#undef CPP_APCS_PC_DEFAULT_SPEC
-#define CPP_APCS_PC_DEFAULT_SPEC "-D__APCS_32__"
-/* On 32-bit machine it is always safe to assume we have the "new"
- floating point system. */
-#undef FP_DEFAULT
-#define FP_DEFAULT FP_SOFT3
-#endif
-
-/* Allow #sccs in preprocessor. */
-#define SCCS_DIRECTIVE
-
-#define USER_LABEL_PREFIX "" /* For ELF the default is no underscores */
-#define LOCAL_LABEL_PREFIX "."
-
-/* Attach a special .ident directive to the end of the file to identify
- the version of GCC which compiled this code. */
-#define IDENT_ASM_OP ".ident"
-
-/* Output #ident as a .ident. */
-#define ASM_OUTPUT_IDENT(FILE, NAME) \
- fprintf (FILE, "\t%s\t\"%s\"\n", IDENT_ASM_OP, NAME);
-
-#ifdef IDENTIFY_WITH_IDENT
-#define ASM_IDENTIFY_GCC(FILE) /* nothing */
-#define ASM_IDENTIFY_LANGUAGE(FILE) \
- fprintf (FILE, "\t%s \"GCC (%s) %s\"\n", IDENT_ASM_OP, \
- lang_identify (), version_string)
-#else
-#define ASM_FILE_END(FILE) \
-do { \
- if (!flag_no_ident) \
- fprintf ((FILE), "\t%s\t\"GCC: (GNU) %s\"\n", \
- IDENT_ASM_OP, version_string); \
- } while (0)
-#endif
-
-/* Support const sections and the ctors and dtors sections for g++.
- Note that there appears to be two different ways to support const
- sections at the moment. You can either #define the symbol
- READONLY_DATA_SECTION (giving it some code which switches to the
- readonly data section) or else you can #define the symbols
- EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and
- SELECT_RTX_SECTION. We do both here just to be on the safe side. */
-#define USE_CONST_SECTION 1
-
-/* Support for Constructors and Destructors. */
-#define READONLY_DATA_SECTION() const_section ()
-
-/* A default list of other sections which we might be "in" at any given
- time. For targets that use additional sections (e.g. .tdesc) you
- should override this definition in the target-specific file which
- includes this file. */
-#define SUBTARGET_EXTRA_SECTIONS in_const,
+#undef LINK_SPEC
+#define LINK_SPEC LINUX_TARGET_LINK_SPEC
-/* A default list of extra section function definitions. For targets
- that use additional sections (e.g. .tdesc) you should override this
- definition in the target-specific file which includes this file. */
-#define SUBTARGET_EXTRA_SECTION_FUNCTIONS CONST_SECTION_FUNCTION
+#define TARGET_OS_CPP_BUILTINS() \
+ do \
+ { \
+ LINUX_TARGET_OS_CPP_BUILTINS(); \
+ } \
+ while (0)
-extern void text_section ();
-
-#define CONST_SECTION_ASM_OP ".section\t.rodata"
-
-#define CONST_SECTION_FUNCTION \
-void \
-const_section () \
-{ \
- if (!USE_CONST_SECTION) \
- text_section (); \
- else if (in_section != in_const) \
- { \
- fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP); \
- in_section = in_const; \
- } \
-}
-
-/* Switch into a generic section.
- This is currently only used to support section attributes.
-
- We make the section read-only and executable for a function decl,
- read-only for a const data decl, and writable for a non-const data decl. */
-#define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME, RELOC) \
- fprintf (FILE, ".section\t%s,\"%s\",%%progbits\n", NAME, \
- (DECL) && TREE_CODE (DECL) == FUNCTION_DECL ? "ax" : \
- (DECL) && DECL_READONLY_SECTION (DECL, RELOC) ? "a" : "aw")
-
-/* A C statement or statements to switch to the appropriate
- section for output of DECL. DECL is either a `VAR_DECL' node
- or a constant of some sort. RELOC indicates whether forming
- the initial value of DECL requires link-time relocations. */
-#define SELECT_SECTION(DECL,RELOC) \
+/* This is how we tell the assembler that two symbols have the same value. */
+#define ASM_OUTPUT_DEF(FILE, NAME1, NAME2) \
+ do \
+ { \
+ assemble_name (FILE, NAME1); \
+ fputs (" = ", FILE); \
+ assemble_name (FILE, NAME2); \
+ fputc ('\n', FILE); \
+ } \
+ while (0)
+
+/* NWFPE always understands FPA instructions. */
+#undef FPUTYPE_DEFAULT
+#define FPUTYPE_DEFAULT FPUTYPE_FPA_EMU3
+
+/* Call the function profiler with a given profile label. */
+#undef ARM_FUNCTION_PROFILER
+#define ARM_FUNCTION_PROFILER(STREAM, LABELNO) \
{ \
- if (TREE_CODE (DECL) == STRING_CST) \
- { \
- if (! flag_writable_strings) \
- const_section (); \
- else \
- data_section (); \
- } \
- else if (TREE_CODE (DECL) == VAR_DECL) \
- { \
- if ((flag_pic && RELOC) \
- || !TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL) \
- || !DECL_INITIAL (DECL) \
- || (DECL_INITIAL (DECL) != error_mark_node \
- && !TREE_CONSTANT (DECL_INITIAL (DECL)))) \
- data_section (); \
- else \
- const_section (); \
- } \
- else \
- const_section (); \
+ fprintf (STREAM, "\tbl\tmcount%s\n", \
+ (TARGET_ARM && NEED_PLT_RELOC) ? "(PLT)" : ""); \
}
-/* A C statement or statements to switch to the appropriate
- section for output of RTX in mode MODE. RTX is some kind
- of constant in RTL. The argument MODE is redundant except
- in the case of a `const_int' rtx. Currently, these always
- go into the const section. */
-#define SELECT_RTX_SECTION(MODE,RTX) const_section ()
-
-/* On svr4, we *do* have support for the .init and .fini sections, and we
- can put stuff in there to be executed before and after `main'. We let
- crtstuff.c and other files know this by defining the following symbols.
- The definitions say how to change sections to the .init and .fini
- sections. This is the same for all known svr4 assemblers. */
-#define INIT_SECTION_ASM_OP ".section\t.init"
-#define FINI_SECTION_ASM_OP ".section\t.fini"
-
-
-/* This is how we tell the assembler that a symbol is weak. */
-#define ASM_WEAKEN_LABEL(FILE,NAME) \
- do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \
- fputc ('\n', FILE); } while (0)
-
-/* This is how we tell the assembler that two symbols have the same value. */
-
-#define ASM_OUTPUT_DEF(FILE,NAME1,NAME2) \
- do { assemble_name (FILE, NAME1); \
- fputs (" = ", FILE); \
- assemble_name (FILE, NAME2); \
- fputc ('\n', FILE); } while (0)
-
-/* Make DWARF2 an option, but keep DBX as the default for now.
- Use -gdwarf-2 to turn on DWARF2. */
-#define DWARF2_DEBUGGING_INFO
-#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
-
-/* Make LBRAC and RBRAC addresses relative to the start of the
- function. The native Solaris stabs debugging format works this
- way, gdb expects it, and it reduces the number of relocation
- entries. */
+/* The GNU/Linux profiler clobbers the link register. Make sure the
+ prologue knows to save it. */
+#define PROFILE_HOOK(X) \
+ emit_insn (gen_rtx_CLOBBER (VOIDmode, gen_rtx_REG (SImode, LR_REGNUM)))
-#define DBX_BLOCKS_FUNCTION_RELATIVE 1
+/* The GNU/Linux profiler needs a frame pointer. */
+#define SUBTARGET_FRAME_POINTER_REQUIRED current_function_profile
-#include "arm/elf.h"
-#include "arm/linux-gas.h"
+/* Add .note.GNU-stack. */
+#undef NEED_INDICATE_EXEC_STACK
+#define NEED_INDICATE_EXEC_STACK 1
OSDN Git Service
