/* Definitions of target machine for GNU compiler, for DEC Alpha w/ELF.
- Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2007, 2008,
- 2009 Free Software Foundation, Inc.
+ Copyright (C) 1996-2020 Free Software Foundation, Inc.
Contributed by Richard Henderson (rth@tamu.edu).
This file is part of GCC.
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
-#undef OBJECT_FORMAT_COFF
-#undef EXTENDED_COFF
-#define OBJECT_FORMAT_ELF
-
-/* ??? Move all SDB stuff from alpha.h to osf.h. */
-#undef SDB_DEBUGGING_INFO
-
-#define DBX_DEBUGGING_INFO 1
-#define DWARF2_DEBUGGING_INFO 1
-
-#undef PREFERRED_DEBUGGING_TYPE
-#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
-
-#undef ASM_FINAL_SPEC
-
-/* alpha/ doesn't use elfos.h for some reason. */
-#define TARGET_OBJFMT_CPP_BUILTINS() \
- do \
- { \
- builtin_define ("__ELF__"); \
- } \
- while (0)
-
#undef CC1_SPEC
#define CC1_SPEC "%{G*}"
#undef ASM_SPEC
-#define ASM_SPEC "%{G*} %{relax:-relax} %{!gstabs*:-no-mdebug}%{gstabs*:-mdebug}"
-
-#undef IDENT_ASM_OP
-#define IDENT_ASM_OP "\t.ident\t"
-
-/* Output #ident as a .ident. */
-#undef ASM_OUTPUT_IDENT
-#define ASM_OUTPUT_IDENT(FILE, NAME) \
- fprintf (FILE, "%s\"%s\"\n", IDENT_ASM_OP, NAME);
-
-/* This is how to allocate empty space in some section. The .zero
- pseudo-op is used for this on most svr4 assemblers. */
-
-#undef SKIP_ASM_OP
-#define SKIP_ASM_OP "\t.zero\t"
-
-#undef ASM_OUTPUT_SKIP
-#define ASM_OUTPUT_SKIP(FILE, SIZE) \
- fprintf (FILE, "%s"HOST_WIDE_INT_PRINT_UNSIGNED"\n", SKIP_ASM_OP, (SIZE))
-
-/* Output the label which precedes a jumptable. Note that for all svr4
- systems where we actually generate jumptables (which is to say every
- svr4 target except i386, where we use casesi instead) we put the jump-
- tables into the .rodata section and since other stuff could have been
- put into the .rodata section prior to any given jumptable, we have to
- make sure that the location counter for the .rodata section gets pro-
- perly re-aligned prior to the actual beginning of the jump table. */
-
-#undef ALIGN_ASM_OP
-#define ALIGN_ASM_OP "\t.align\t"
-
-#ifndef ASM_OUTPUT_BEFORE_CASE_LABEL
-#define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE, PREFIX, NUM, TABLE) \
- ASM_OUTPUT_ALIGN ((FILE), 2);
-#endif
-
-#undef ASM_OUTPUT_CASE_LABEL
-#define ASM_OUTPUT_CASE_LABEL(FILE, PREFIX, NUM, JUMPTABLE) \
- do { \
- ASM_OUTPUT_BEFORE_CASE_LABEL (FILE, PREFIX, NUM, JUMPTABLE) \
- (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM); \
- } while (0)
-
-/* The standard SVR4 assembler seems to require that certain builtin
- library routines (e.g. .udiv) be explicitly declared as .globl
- in each assembly file where they are referenced. */
+#define ASM_SPEC "%{G*} %{relax:-relax} %{!gstabs*:-no-mdebug}%{gstabs*:-mdebug} %{mcpu=*:-m%*}"
-#undef ASM_OUTPUT_EXTERNAL_LIBCALL
-#define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
- (*targetm.asm_out.globalize_label) (FILE, XSTR (FUN, 0))
+/* Do not output a .file directive at the beginning of the input file. */
+
+#undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
+#define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
-/* This says how to output assembler code to declare an
- uninitialized external linkage data object. Under SVR4,
- the linker seems to want the alignment of data objects
- to depend on their types. We do exactly that here. */
+/* This is how to output an assembler line
+ that says to advance the location counter
+ to a multiple of 2**LOG bytes. */
-#undef COMMON_ASM_OP
-#define COMMON_ASM_OP "\t.comm\t"
-
-#undef ASM_OUTPUT_ALIGNED_COMMON
-#define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
-do { \
- fprintf ((FILE), "%s", COMMON_ASM_OP); \
- assemble_name ((FILE), (NAME)); \
- fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED ",%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT); \
-} while (0)
+#define ASM_OUTPUT_ALIGN(FILE,LOG) \
+ if ((LOG) != 0) \
+ fprintf (FILE, "\t.align %d\n", LOG);
/* This says how to output assembler code to declare an
uninitialized internal linkage data object. Under SVR4,
#undef ASM_OUTPUT_ALIGNED_LOCAL
#define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
do { \
- if ((SIZE) <= g_switch_value) \
+ if ((SIZE) <= (unsigned HOST_WIDE_INT) g_switch_value) \
switch_to_section (sbss_section); \
else \
switch_to_section (bss_section); \
ASM_OUTPUT_ALIGNED_LOCAL (FILE, NAME, SIZE, ALIGN); \
} while (0)
-/* The biggest alignment supported by ELF in bits. 32-bit ELF
- supports section alignment up to (0x80000000 * 8), while
- 64-bit ELF supports (0x8000000000000000 * 8). If this macro
- is not defined, the default is the largest alignment supported
- by 32-bit ELF and representable on a 32-bit host. Use this
- macro to limit the alignment which can be specified using
- the `__attribute__ ((aligned (N)))' construct.
-
- This value is really 2^63. Since gcc figures the alignment in bits,
- we could only potentially get to 2^60 on suitable hosts. Due to other
- considerations in varasm, we must restrict this to what fits in an int. */
-
-#undef MAX_OFILE_ALIGNMENT
-#define MAX_OFILE_ALIGNMENT (((unsigned int) 1 << 28) * 8)
-
-/* This is the pseudo-op used to generate a contiguous sequence of byte
- values from a double-quoted string WITHOUT HAVING A TERMINATING NUL
- AUTOMATICALLY APPENDED. This is the same for most svr4 assemblers. */
-
-#undef ASCII_DATA_ASM_OP
-#define ASCII_DATA_ASM_OP "\t.ascii\t"
-
-#undef READONLY_DATA_SECTION_ASM_OP
-#define READONLY_DATA_SECTION_ASM_OP "\t.section\t.rodata"
#undef BSS_SECTION_ASM_OP
#define BSS_SECTION_ASM_OP "\t.section\t.bss"
#undef SBSS_SECTION_ASM_OP
#undef SDATA_SECTION_ASM_OP
#define SDATA_SECTION_ASM_OP "\t.section\t.sdata,\"aw\""
-/* 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. */
-
-#undef INIT_SECTION_ASM_OP
-#define INIT_SECTION_ASM_OP "\t.section\t.init"
-#undef FINI_SECTION_ASM_OP
-#define FINI_SECTION_ASM_OP "\t.section\t.fini"
-
-#ifdef HAVE_GAS_SUBSECTION_ORDERING
-
-#define ASM_SECTION_START_OP "\t.subsection\t-1"
-
-/* Output assembly directive to move to the beginning of current section. */
-#define ASM_OUTPUT_SECTION_START(FILE) \
- fprintf ((FILE), "%s\n", ASM_SECTION_START_OP)
-
-#endif
-
-/* Switch into a generic section. */
-#define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
-#define TARGET_ASM_SELECT_SECTION default_elf_select_section
-
-#define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
-
-/* Define the strings used for the special svr4 .type and .size directives.
- These strings generally do not vary from one system running svr4 to
- another, but if a given system (e.g. m88k running svr) needs to use
- different pseudo-op names for these, they may be overridden in the
- file which includes this one. */
-
-#undef TYPE_ASM_OP
-#define TYPE_ASM_OP "\t.type\t"
-#undef SIZE_ASM_OP
-#define SIZE_ASM_OP "\t.size\t"
-
-/* This is how we tell the assembler that a symbol is weak. */
-
-#undef ASM_WEAKEN_LABEL
-#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. */
#undef ASM_OUTPUT_DEF
assemble_name (FILE, name); \
fputs ("..ng\n", FILE); \
} \
- assemble_name(FILE, alias); \
- fputs(" = ", FILE); \
- assemble_name(FILE, name); \
- fputc('\n', FILE); \
- } while (0)
-
-/* The following macro defines the format used to output the second
- operand of the .type assembler directive. Different svr4 assemblers
- expect various different forms for this operand. The one given here
- is just a default. You may need to override it in your machine-
- specific tm.h file (depending upon the particulars of your assembler). */
-
-#undef TYPE_OPERAND_FMT
-#define TYPE_OPERAND_FMT "@%s"
-
-/* Write the extra assembler code needed to declare a function's result.
- Most svr4 assemblers don't require any special declaration of the
- result value, but there are exceptions. */
-
-#ifndef ASM_DECLARE_RESULT
-#define ASM_DECLARE_RESULT(FILE, RESULT)
-#endif
-
-/* These macros generate the special .type and .size directives which
- are used to set the corresponding fields of the linker symbol table
- entries in an ELF object file under SVR4. These macros also output
- the starting labels for the relevant functions/objects. */
-
-/* Write the extra assembler code needed to declare an object properly. */
-
-#ifdef HAVE_GAS_GNU_UNIQUE_OBJECT
-#define USE_GNU_UNIQUE_OBJECT 1
-#else
-#define USE_GNU_UNIQUE_OBJECT 0
-#endif
-
-#undef ASM_DECLARE_OBJECT_NAME
-#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
- do { \
- HOST_WIDE_INT size; \
- \
- /* For template static data member instantiations or \
- inline fn local statics, use gnu_unique_object so that \
- they will be combined even under RTLD_LOCAL. */ \
- if (USE_GNU_UNIQUE_OBJECT \
- && !DECL_ARTIFICIAL (DECL) && DECL_ONE_ONLY (DECL)) \
- ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "gnu_unique_object"); \
- 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); \
+ ASM_OUTPUT_DEF (FILE, alias, name); \
} while (0)
-/* Output the size directive for a decl in rest_of_decl_compilation
- in the case where we did not do so before the initializer.
- Once we find the error_mark_node, we know that the value of
- size_directive_output was set
- by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */
-
-#undef ASM_FINISH_DECLARE_OBJECT
-#define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \
- do { \
- const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
- HOST_WIDE_INT size; \
- if (!flag_inhibit_size_directive \
- && DECL_SIZE (DECL) \
- && ! AT_END && TOP_LEVEL \
- && DECL_INITIAL (DECL) == error_mark_node \
- && !size_directive_output \
- && (size = int_size_in_bytes (TREE_TYPE (DECL))) > 0) \
- { \
- size_directive_output = 1; \
- ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size); \
- } \
- } while (0)
-
-/* A table of bytes codes used by the ASM_OUTPUT_ASCII and
- ASM_OUTPUT_LIMITED_STRING macros. Each byte in the table
- corresponds to a particular byte value [0..255]. For any
- given byte value, if the value in the corresponding table
- position is zero, the given character can be output directly.
- If the table value is 1, the byte must be output as a \ooo
- octal escape. If the tables value is anything else, then the
- byte value should be output as a \ followed by the value
- in the table. Note that we can use standard UN*X escape
- sequences for many control characters, but we don't use
- \a to represent BEL because some svr4 assemblers (e.g. on
- the i386) don't know about that. Also, we don't use \v
- since some versions of gas, such as 2.2 did not accept it. */
-
-#undef ESCAPES
-#define ESCAPES \
-"\1\1\1\1\1\1\1\1btn\1fr\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
-\0\0\"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
-\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\\\0\0\0\
-\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\
-\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
-\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
-\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
-\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1"
-
-/* Some svr4 assemblers have a limit on the number of characters which
- can appear in the operand of a .string directive. If your assembler
- has such a limitation, you should define STRING_LIMIT to reflect that
- limit. Note that at least some svr4 assemblers have a limit on the
- actual number of bytes in the double-quoted string, and that they
- count each character in an escape sequence as one byte. Thus, an
- escape sequence like \377 would count as four bytes.
-
- If your target assembler doesn't support the .string directive, you
- should define this to zero. */
-
-#undef STRING_LIMIT
-#define STRING_LIMIT ((unsigned) 256)
-#undef STRING_ASM_OP
-#define STRING_ASM_OP "\t.string\t"
-
-/* GAS is the only Alpha/ELF assembler. */
-#undef TARGET_GAS
-#define TARGET_GAS (1)
-
-/* Provide a STARTFILE_SPEC appropriate for ELF. Here we add the
- (even more) magical crtbegin.o file which provides part of the
- support for getting C++ file-scope static object constructed
- before entering `main'. */
-
-#undef STARTFILE_SPEC
-#ifdef HAVE_LD_PIE
-#define STARTFILE_SPEC \
- "%{!shared: %{pg|p:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}}\
- crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
-#else
-#define STARTFILE_SPEC \
- "%{!shared: %{pg|p:gcrt1.o%s;:crt1.o%s}}\
- crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
-#endif
-
-/* Provide a ENDFILE_SPEC appropriate for ELF. Here we tack on the
- magical crtend.o file which provides part of the support for
- getting C++ file-scope static object constructed before entering
- `main', followed by a normal ELF "finalizer" file, `crtn.o'. */
-
-#undef ENDFILE_SPEC
-#define ENDFILE_SPEC \
- "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
- %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"
-
-/* We support #pragma. */
-#define HANDLE_SYSV_PRAGMA 1
+/* This variable should be set to 'true' if the target ABI requires
+ unwinding tables even when exceptions are not used. */
+#define TARGET_UNWIND_TABLES_DEFAULT true
/* Select a format to encode pointers in exception handling data. CODE
is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is
I imagine that other systems will catch up. In the meantime, it
doesn't harm to make sure that the data exists to be used later. */
#if defined(HAVE_LD_EH_FRAME_HDR)
-#define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
-#endif
-
-/* A C statement (sans semicolon) to output to the stdio stream STREAM
- any text necessary for declaring the name of an external symbol
- named NAME which is referenced in this compilation but not defined.
- It is needed to properly support non-default visibility. */
-
-#ifndef ASM_OUTPUT_EXTERNAL
-#define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
- default_elf_asm_output_external (FILE, DECL, NAME)
+#define LINK_EH_SPEC "%{!static|static-pie:--eh-frame-hdr} "
#endif
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