Rewrite this file (again). Copy the Linux Alpha config, and tweak it
to work with NetBSD. Use as many NetBSD common definitions as possible.
This commit is contained in:
thorpej
parent
00e90d68da
commit
7f756d0c18
445
gnu/dist/gcc/config/alpha/netbsd.h
vendored
445
gnu/dist/gcc/config/alpha/netbsd.h
vendored
@ -1,22 +1,62 @@
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/* Get generic alpha definitions. */
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/* Definitions of target machine for GNU compiler, for DEC Alpha w/ELF.
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Copyright (C) 1996, 1997 Free Software Foundation, Inc.
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Contributed by Richard Henderson (rth@tamu.edu).
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* This is used on Alpha platforms that use the ELF format.
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This was taken from the Linux configuration, and modified
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for NetBSD/alpha by Jason R. Thorpe <thorpej@netbsd.org> */
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/* Get generic Alpha definitions. */
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#include <alpha/alpha.h>
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/* Get generic alpha ELF definitions. */
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#include <alpha/elf.h>
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/* Get generic NetBSD definitions. */
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/* Get generic NetBSD ELF definitions. We will override these if necessary. */
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#define NETBSD_ELF
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#include <netbsd.h>
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#undef OBJECT_FORMAT_COFF
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#undef EXTENDED_COFF
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#define OBJECT_FORMAT_ELF
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/* This is BSD, so it wants DBX format. */
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#define DBX_DEBUGGING_INFO
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/* This is the char to use for continuation (in case we need to turn
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continuation back on). */
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#define DBX_CONTIN_CHAR '?'
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#undef ASM_FINAL_SPEC
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/* Names to predefine in the preprocessor for this target machine.
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XXX NetBSD, by convention, shouldn't do __alpha, but lots of applications
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expect it because that's what OSF/1 does. */
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/* NetBSD Extension to GNU C: __KPRINTF_ATTRIBUTE__ */
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#undef CPP_PREDEFINES
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#define CPP_PREDEFINES "-D__alpha__ -D__alpha -D__NetBSD__ -D__ELF__ -D__KPRINTF_ATTRIBUTE__ -Asystem(unix) -Asystem(NetBSD) -Acpu(alpha) -Amachine(alpha)"
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#define CPP_PREDEFINES "\
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-D__alpha__ -D__alpha -D__NetBSD__ -D__ELF__ -D__KPRINTF_ATTRIBUTE__ \
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-Asystem(unix) -Asystem(NetBSD) -Acpu(alpha) -Amachine(alpha)"
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/* Make gcc agree with <machine/ansi.h> */
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@ -26,30 +66,16 @@
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#undef WCHAR_TYPE_SIZE
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#define WCHAR_TYPE_SIZE 32
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/* This is BSD, so it wants DBX format. */
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#define DBX_DEBUGGING_INFO
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/* This is the char to use for continuation (in case we need to turn
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continuation back on). */
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#define DBX_CONTIN_CHAR '?'
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/* Name the port */
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#define TARGET_NAME "alpha-netbsd"
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/* XXX Override this back to the default; <alpha/elf.h> mucks with it
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for Linux/Alpha. */
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#undef TARGET_VERSION
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#define TARGET_VERSION fprintf (stderr, " (%s)", TARGET_NAME)
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/* Name the port. */
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#define TARGET_NAME "alpha-netbsd"
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/* Output assembler code to FILE to increment profiler label # LABELNO
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for profiling a function entry. Under NetBSD/Alpha, the assembler does
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nothing special with -pg. */
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#undef FUNCTION_PROFILER
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#define FUNCTION_PROFILER(FILE, LABELNO) \
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fputs ("\tjsr $28,_mcount\n", (FILE)); /* at */
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#define FUNCTION_PROFILER(FILE, LABELNO) \
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fputs ("\tjsr $28,_mcount\n", (FILE)); /* at */
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/* Show that we need a GP when profiling. */
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#define TARGET_PROFILING_NEEDS_GP
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@ -57,22 +83,19 @@ fputs ("\tjsr $28,_mcount\n", (FILE)); /* at */
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#define bsd4_4
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#undef HAS_INIT_SECTION
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#undef PREFERRED_DEBUGGING_TYPE
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#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
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/* Provide an ASM_SPEC appropriate for a NetBSD/alpha target. This differs
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from the generic NetBSD ASM_SPEC in that no special handling of PIC is
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necessary on the Alpha. */
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#undef ASM_SPEC
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#define ASM_SPEC " %|"
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#define ASM_SPEC " %|"
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/* Provide a LINK_SPEC appropriate for a NetBSD/alpha ELF target. Only
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the linker emulation and -O options are Alpha-specific. The rest are
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common to all ELF targets, except for the name of the start function. */
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#undef LINK_SPEC
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#define LINK_SPEC \
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#define LINK_SPEC \
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"-m elf64alpha \
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%{O*:-O3} %{!O*:-O1} \
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%{assert*} \
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@ -84,3 +107,365 @@ fputs ("\tjsr $28,_mcount\n", (FILE)); /* at */
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%{rdynamic:-export-dynamic} \
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%{!dynamic-linker:-dynamic-linker /usr/libexec/ld.elf_so}} \
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%{static:-static}}"
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#undef DEFAULT_VTABLE_THUNKS
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#define DEFAULT_VTABLE_THUNKS 1
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/* Output at beginning of assembler file. */
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#undef ASM_FILE_START
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#define ASM_FILE_START(FILE) \
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{ \
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alpha_write_verstamp (FILE); \
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output_file_directive (FILE, main_input_filename); \
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fprintf (FILE, "\t.version\t\"01.01\"\n"); \
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fprintf (FILE, "\t.set noat\n"); \
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}
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#define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) \
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alpha_output_lineno (STREAM, LINE)
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extern void alpha_output_lineno ();
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extern void output_file_directive ();
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/* Attach a special .ident directive to the end of the file to identify
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the version of GCC which compiled this code. The format of the
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.ident string is patterned after the ones produced by native svr4
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C compilers. */
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#define IDENT_ASM_OP ".ident"
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#ifdef IDENTIFY_WITH_IDENT
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#define ASM_IDENTIFY_GCC(FILE) /* nothing */
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#define ASM_IDENTIFY_LANGUAGE(FILE) \
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fprintf(FILE, "\t%s \"GCC (%s) %s\"\n", IDENT_ASM_OP, \
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lang_identify(), version_string)
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#else
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#define ASM_FILE_END(FILE) \
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do { \
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fprintf ((FILE), "\t%s\t\"GCC: (GNU) %s\"\n", \
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IDENT_ASM_OP, version_string); \
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} while (0)
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#endif
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/* Allow #sccs in preprocessor. */
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#define SCCS_DIRECTIVE
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/* Output #ident as a .ident. */
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#define ASM_OUTPUT_IDENT(FILE, NAME) \
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fprintf (FILE, "\t%s\t\"%s\"\n", IDENT_ASM_OP, NAME);
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/* This is how to allocate empty space in some section. The .zero
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pseudo-op is used for this on most svr4 assemblers. */
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#define SKIP_ASM_OP ".zero"
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#undef ASM_OUTPUT_SKIP
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#define ASM_OUTPUT_SKIP(FILE,SIZE) \
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fprintf (FILE, "\t%s\t%u\n", SKIP_ASM_OP, (SIZE))
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/* Output the label which precedes a jumptable. Note that for all svr4
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systems where we actually generate jumptables (which is to say every
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svr4 target except i386, where we use casesi instead) we put the jump-
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tables into the .rodata section and since other stuff could have been
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put into the .rodata section prior to any given jumptable, we have to
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make sure that the location counter for the .rodata section gets pro-
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perly re-aligned prior to the actual beginning of the jump table. */
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#define ALIGN_ASM_OP ".align"
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#ifndef ASM_OUTPUT_BEFORE_CASE_LABEL
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#define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \
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ASM_OUTPUT_ALIGN ((FILE), 2);
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#endif
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#undef ASM_OUTPUT_CASE_LABEL
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#define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,JUMPTABLE) \
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do { \
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ASM_OUTPUT_BEFORE_CASE_LABEL (FILE, PREFIX, NUM, JUMPTABLE) \
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ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); \
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} while (0)
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/* The standard SVR4 assembler seems to require that certain builtin
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library routines (e.g. .udiv) be explicitly declared as .globl
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in each assembly file where they are referenced. */
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#define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
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ASM_GLOBALIZE_LABEL (FILE, XSTR (FUN, 0))
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/* This says how to output assembler code to declare an
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uninitialized external linkage data object. Under SVR4,
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the linker seems to want the alignment of data objects
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to depend on their types. We do exactly that here. */
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#define COMMON_ASM_OP ".comm"
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#undef ASM_OUTPUT_ALIGNED_COMMON
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#define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
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do { \
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fprintf ((FILE), "\t%s\t", COMMON_ASM_OP); \
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assemble_name ((FILE), (NAME)); \
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fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT); \
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} while (0)
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/* This says how to output assembler code to declare an
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uninitialized internal linkage data object. Under SVR4,
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the linker seems to want the alignment of data objects
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to depend on their types. We do exactly that here. */
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#define LOCAL_ASM_OP ".local"
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#undef ASM_OUTPUT_ALIGNED_LOCAL
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#define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
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do { \
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fprintf ((FILE), "\t%s\t", LOCAL_ASM_OP); \
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assemble_name ((FILE), (NAME)); \
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fprintf ((FILE), "\n"); \
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ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN); \
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} while (0)
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/* This is the pseudo-op used to generate a 64-bit word of data with a
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specific value in some section. */
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#define INT_ASM_OP ".quad"
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/* This is the pseudo-op used to generate a contiguous sequence of byte
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values from a double-quoted string WITHOUT HAVING A TERMINATING NUL
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AUTOMATICALLY APPENDED. This is the same for most svr4 assemblers. */
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#undef ASCII_DATA_ASM_OP
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#define ASCII_DATA_ASM_OP ".ascii"
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/* Support const sections and the ctors and dtors sections for g++.
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Note that there appears to be two different ways to support const
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sections at the moment. You can either #define the symbol
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READONLY_DATA_SECTION (giving it some code which switches to the
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readonly data section) or else you can #define the symbols
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EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and
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||||
SELECT_RTX_SECTION. We do both here just to be on the safe side. */
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#define USE_CONST_SECTION 1
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#define CONST_SECTION_ASM_OP ".section\t.rodata"
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/* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
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||||
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||||
Note that we want to give these sections the SHF_WRITE attribute
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||||
because these sections will actually contain data (i.e. tables of
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||||
addresses of functions in the current root executable or shared library
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||||
file) and, in the case of a shared library, the relocatable addresses
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||||
will have to be properly resolved/relocated (and then written into) by
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||||
the dynamic linker when it actually attaches the given shared library
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||||
to the executing process. (Note that on SVR4, you may wish to use the
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||||
`-z text' option to the ELF linker, when building a shared library, as
|
||||
an additional check that you are doing everything right. But if you do
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||||
use the `-z text' option when building a shared library, you will get
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||||
errors unless the .ctors and .dtors sections are marked as writable
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||||
via the SHF_WRITE attribute.) */
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||||
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#define CTORS_SECTION_ASM_OP ".section\t.ctors,\"aw\""
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#define DTORS_SECTION_ASM_OP ".section\t.dtors,\"aw\""
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||||
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||||
/* 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
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||||
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. */
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||||
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#define INIT_SECTION_ASM_OP ".section\t.init"
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#define FINI_SECTION_ASM_OP ".section\t.fini"
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||||
/* A default list of other sections which we might be "in" at any given
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||||
time. For targets that use additional sections (e.g. .tdesc) you
|
||||
should override this definition in the target-specific file which
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||||
includes this file. */
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||||
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#undef EXTRA_SECTIONS
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#define EXTRA_SECTIONS in_const, in_ctors, in_dtors
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||||
|
||||
/* 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. */
|
||||
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||||
#undef EXTRA_SECTION_FUNCTIONS
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||||
#define EXTRA_SECTION_FUNCTIONS \
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||||
CONST_SECTION_FUNCTION \
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CTORS_SECTION_FUNCTION \
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||||
DTORS_SECTION_FUNCTION
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||||
#undef READONLY_DATA_SECTION
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||||
#define READONLY_DATA_SECTION() const_section ()
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||||
extern void text_section ();
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||||
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#define CONST_SECTION_FUNCTION \
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||||
void \
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||||
const_section () \
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||||
{ \
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||||
if (!USE_CONST_SECTION) \
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||||
text_section(); \
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||||
else if (in_section != in_const) \
|
||||
{ \
|
||||
fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP); \
|
||||
in_section = in_const; \
|
||||
} \
|
||||
}
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||||
|
||||
#define CTORS_SECTION_FUNCTION \
|
||||
void \
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||||
ctors_section () \
|
||||
{ \
|
||||
if (in_section != in_ctors) \
|
||||
{ \
|
||||
fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP); \
|
||||
in_section = in_ctors; \
|
||||
} \
|
||||
}
|
||||
|
||||
#define DTORS_SECTION_FUNCTION \
|
||||
void \
|
||||
dtors_section () \
|
||||
{ \
|
||||
if (in_section != in_dtors) \
|
||||
{ \
|
||||
fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP); \
|
||||
in_section = in_dtors; \
|
||||
} \
|
||||
}
|
||||
|
||||
/* 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 (sans semicolon) to output an element in the table of
|
||||
global constructors. */
|
||||
#define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \
|
||||
do { \
|
||||
ctors_section (); \
|
||||
fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
|
||||
assemble_name (FILE, NAME); \
|
||||
fprintf (FILE, "\n"); \
|
||||
} while (0)
|
||||
|
||||
/* A C statement (sans semicolon) to output an element in the table of
|
||||
global destructors. */
|
||||
#define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
|
||||
do { \
|
||||
dtors_section (); \
|
||||
fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
|
||||
assemble_name (FILE, NAME); \
|
||||
fprintf (FILE, "\n"); \
|
||||
} while (0)
|
||||
|
||||
/* 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) \
|
||||
{ \
|
||||
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 (); \
|
||||
}
|
||||
|
||||
/* 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. */
|
||||
|
||||
#undef SELECT_RTX_SECTION
|
||||
#define SELECT_RTX_SECTION(MODE,RTX) const_section()
|
||||
|
||||
/* 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. */
|
||||
|
||||
#define TYPE_ASM_OP ".type"
|
||||
#define SIZE_ASM_OP ".size"
|
||||
|
||||
/* 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)
|
||||
|
||||
/* 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. */
|
||||
|
||||
#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.
|
||||
*/
|
||||
|
||||
#define STRING_LIMIT ((unsigned) 256)
|
||||
|
||||
#define STRING_ASM_OP ".string"
|
||||
|
||||
/*
|
||||
* We always use gas here, so we don't worry about ECOFF assembler problems.
|
||||
*/
|
||||
#undef TARGET_GAS
|
||||
#define TARGET_GAS (1)
|
||||
|
||||
#undef PREFERRED_DEBUGGING_TYPE
|
||||
#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
|
||||
|
||||
Loading…
Reference in New Issue
Block a user