/* Definitions of various defaults for tm.h macros.
Copyright (C) 1992, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
- 2005, 2007, 2008, 2009, 2010
+ 2005, 2007, 2008, 2009, 2010, 2011
Free Software Foundation, Inc.
Contributed by Ron Guilmette (rfg@monkeys.com)
#ifndef GCC_DEFAULTS_H
#define GCC_DEFAULTS_H
-#ifndef GET_ENVIRONMENT
-#define GET_ENVIRONMENT(VALUE, NAME) do { (VALUE) = getenv (NAME); } while (0)
+/* How to start an assembler comment. */
+#ifndef ASM_COMMENT_START
+#define ASM_COMMENT_START ";#"
#endif
/* Store in OUTPUT a string (made with alloca) containing an
#endif
#endif
+#ifndef IFUNC_ASM_TYPE
+#define IFUNC_ASM_TYPE "gnu_indirect_function"
+#endif
+
#ifndef TLS_COMMON_ASM_OP
#define TLS_COMMON_ASM_OP ".tls_common"
#endif
#endif
#endif
-/* This determines whether or not we support weak symbols. */
+/* This determines whether or not we support weak symbols. SUPPORTS_WEAK
+ must be a preprocessor constant. */
#ifndef SUPPORTS_WEAK
#if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
#define SUPPORTS_WEAK 1
#endif
#endif
+/* This determines whether or not we support weak symbols during target
+ code generation. TARGET_SUPPORTS_WEAK can be any valid C expression. */
+#ifndef TARGET_SUPPORTS_WEAK
+#define TARGET_SUPPORTS_WEAK (SUPPORTS_WEAK)
+#endif
+
/* This determines whether or not we support the discriminator
attribute in the .loc directive. */
#ifndef SUPPORTS_DISCRIMINATOR
/* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
the rest of the DWARF 2 frame unwind support is also provided. */
-#if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX) \
- && !defined (TARGET_UNWIND_INFO)
+#if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
#define DWARF2_UNWIND_INFO 1
#endif
#define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
#endif
+/* Offsets recorded in opcodes are a multiple of this alignment factor. */
+#ifndef DWARF_CIE_DATA_ALIGNMENT
+#ifdef STACK_GROWS_DOWNWARD
+#define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD))
+#else
+#define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD)
+#endif
+#endif
+
+/* The DWARF 2 CFA column which tracks the return address. Normally this
+ is the column for PC, or the first column after all of the hard
+ registers. */
+#ifndef DWARF_FRAME_RETURN_COLUMN
+#ifdef PC_REGNUM
+#define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM)
+#else
+#define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGISTERS
+#endif
+#endif
+
/* How to renumber registers for dbx and gdb. If not defined, assume
no renumbering is necessary. */
#define DBX_REGISTER_NUMBER(REGNO) (REGNO)
#endif
+/* The mapping from gcc register number to DWARF 2 CFA column number.
+ By default, we just provide columns for all registers. */
+#ifndef DWARF_FRAME_REGNUM
+#define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
+#endif
+
+/* Map register numbers held in the call frame info that gcc has
+ collected using DWARF_FRAME_REGNUM to those that should be output in
+ .debug_frame and .eh_frame. */
+#ifndef DWARF2_FRAME_REG_OUT
+#define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO)
+#endif
+
+/* The size of addresses as they appear in the Dwarf 2 data.
+ Some architectures use word addresses to refer to code locations,
+ but Dwarf 2 info always uses byte addresses. On such machines,
+ Dwarf 2 addresses need to be larger than the architecture's
+ pointers. */
+#ifndef DWARF2_ADDR_SIZE
+#define DWARF2_ADDR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
+#endif
+
+/* The size in bytes of a DWARF field indicating an offset or length
+ relative to a debug info section, specified to be 4 bytes in the
+ DWARF-2 specification. The SGI/MIPS ABI defines it to be the same
+ as PTR_SIZE. */
+#ifndef DWARF_OFFSET_SIZE
+#define DWARF_OFFSET_SIZE 4
+#endif
+
+/* The size in bytes of a DWARF 4 type signature. */
+#ifndef DWARF_TYPE_SIGNATURE_SIZE
+#define DWARF_TYPE_SIGNATURE_SIZE 8
+#endif
+
/* Default sizes for base C types. If the sizes are different for
your target, you should override these values by defining the
appropriate symbols in your tm.h file. */
#define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
#endif
+#ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
+#define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 0
+#endif
+
#ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
#define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
#endif
#define TARGET_DEFAULT_PACK_STRUCT 0
#endif
-/* By default, the C++ compiler will use function addresses in the
- vtable entries. Setting this nonzero tells the compiler to use
- function descriptors instead. The value of this macro says how
- many words wide the descriptor is (normally 2). It is assumed
- that the address of a function descriptor may be treated as a
- pointer to a function. */
-#ifndef TARGET_VTABLE_USES_DESCRIPTORS
-#define TARGET_VTABLE_USES_DESCRIPTORS 0
-#endif
-
/* By default, the vtable entries are void pointers, the so the alignment
is the same as pointer alignment. The value of this macro specifies
the alignment of the vtable entry in bits. It should be defined only
#define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
#endif
+#ifndef REG_WORDS_BIG_ENDIAN
+#define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
+#endif
+
#ifdef TARGET_FLT_EVAL_METHOD
#define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 1
#else
#define TARGET_DEC_EVAL_METHOD 2
#endif
-#ifndef HOT_TEXT_SECTION_NAME
-#define HOT_TEXT_SECTION_NAME ".text.hot"
-#endif
-
-#ifndef UNLIKELY_EXECUTED_TEXT_SECTION_NAME
-#define UNLIKELY_EXECUTED_TEXT_SECTION_NAME ".text.unlikely"
-#endif
-
#ifndef HAS_LONG_COND_BRANCH
#define HAS_LONG_COND_BRANCH 0
#endif
#define HAS_LONG_UNCOND_BRANCH 0
#endif
-/* By default, only attempt to parallelize bitwise operations, and
- possibly adds/subtracts using bit-twiddling. */
-#ifndef UNITS_PER_SIMD_WORD
-#define UNITS_PER_SIMD_WORD(MODE) UNITS_PER_WORD
-#endif
-
/* Determine whether __cxa_atexit, rather than atexit, is used to
register C++ destructors for local statics and global objects. */
#ifndef DEFAULT_USE_CXA_ATEXIT
#define MIN_UNITS_PER_WORD UNITS_PER_WORD
#endif
+#ifndef MAX_BITS_PER_WORD
+#define MAX_BITS_PER_WORD BITS_PER_WORD
+#endif
+
#ifndef STACK_POINTER_OFFSET
#define STACK_POINTER_OFFSET 0
#endif
functions.
*/
-/* Just because the user configured --with-sjlj-exceptions=no doesn't
- mean that we can use call frame exceptions. Detect that the target
- has appropriate support. */
-
-#ifndef MUST_USE_SJLJ_EXCEPTIONS
-# if defined (EH_RETURN_DATA_REGNO) \
- && (defined (TARGET_UNWIND_INFO) \
- || (DWARF2_UNWIND_INFO \
- && (defined (EH_RETURN_HANDLER_RTX) \
- || defined (HAVE_eh_return))))
-# define MUST_USE_SJLJ_EXCEPTIONS 0
-# else
-# define MUST_USE_SJLJ_EXCEPTIONS 1
-# endif
-#endif
-
-#ifdef CONFIG_SJLJ_EXCEPTIONS
-# if CONFIG_SJLJ_EXCEPTIONS == 1
-# define USING_SJLJ_EXCEPTIONS 1
-# endif
-# if CONFIG_SJLJ_EXCEPTIONS == 0
-# define USING_SJLJ_EXCEPTIONS 0
-# if !defined(EH_RETURN_DATA_REGNO)
- #error "EH_RETURN_DATA_REGNO required"
-# endif
-# if ! (defined(TARGET_UNWIND_INFO) || DWARF2_UNWIND_INFO)
- #error "{DWARF2,TARGET}_UNWIND_INFO required"
-# endif
-# if !defined(TARGET_UNWIND_INFO) \
- && !(defined(EH_RETURN_HANDLER_RTX) || defined(HAVE_eh_return))
- #error "EH_RETURN_HANDLER_RTX or eh_return required"
-# endif
-/* Usually the above error checks will have already triggered an
- error, but backends may set MUST_USE_SJLJ_EXCEPTIONS for their own
- reasons. */
-# if MUST_USE_SJLJ_EXCEPTIONS
- #error "Must use SJLJ exceptions but configured not to"
-# endif
-# endif
-#else
-# define USING_SJLJ_EXCEPTIONS MUST_USE_SJLJ_EXCEPTIONS
-#endif
-
/* The default branch cost is 1. */
#ifndef BRANCH_COST
#define BRANCH_COST(speed_p, predictable_p) 1
DEFAULT_FUNCTION_ARG_PADDING ((MODE), (TYPE))
#endif
-/* Supply a default definition for FUNCTION_ARG_BOUNDARY. Normally, we let
- FUNCTION_ARG_PADDING, which also pads the length, handle any needed
- alignment. */
-
-#ifndef FUNCTION_ARG_BOUNDARY
-#define FUNCTION_ARG_BOUNDARY(MODE, TYPE) PARM_BOUNDARY
-#endif
-
/* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
Normally move_insn, so Pmode stack pointer. */
#ifdef STACK_CHECK_PROTECT
#define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
#else
-#define STACK_OLD_CHECK_PROTECT \
- (USING_SJLJ_EXCEPTIONS ? 75 * UNITS_PER_WORD : 8 * 1024)
+#define STACK_OLD_CHECK_PROTECT \
+ (targetm_common.except_unwind_info (&global_options) == UI_SJLJ \
+ ? 75 * UNITS_PER_WORD \
+ : 8 * 1024)
#endif
/* Minimum amount of stack required to recover from an anticipated stack
overflow detection. The default value conveys an estimate of the amount
of stack required to propagate an exception. */
#ifndef STACK_CHECK_PROTECT
-#define STACK_CHECK_PROTECT \
- (USING_SJLJ_EXCEPTIONS ? 75 * UNITS_PER_WORD : 12 * 1024)
+#define STACK_CHECK_PROTECT \
+ (targetm_common.except_unwind_info (&global_options) == UI_SJLJ \
+ ? 75 * UNITS_PER_WORD \
+ : 12 * 1024)
#endif
/* Make the maximum frame size be the largest we can and still only need
#define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
#endif
+/* By default, the C++ compiler will use function addresses in the
+ vtable entries. Setting this nonzero tells the compiler to use
+ function descriptors instead. The value of this macro says how
+ many words wide the descriptor is (normally 2). It is assumed
+ that the address of a function descriptor may be treated as a
+ pointer to a function. */
+#ifndef TARGET_VTABLE_USES_DESCRIPTORS
+#define TARGET_VTABLE_USES_DESCRIPTORS 0
+#endif
+
#ifndef SWITCHABLE_TARGET
#define SWITCHABLE_TARGET 0
#endif
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