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/* Definitions for DEC AXP Alpha running FreeBSD using the ELF format
Copyright (C) 2000 Free Software Foundation, Inc.
Contributed by David O'Brien <obrien@FreeBSD.org>
This file is part of GNU CC.
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.
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.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* This is used on Alpha platforms that use the ELF format.
This was taken from the NetBSD configuration, and modified
for FreeBSD/Alpha by Hidetoshi Shimokawa <simokawa@FreeBSD.ORG> */
/* $FreeBSD$ */
/* Names to predefine in the preprocessor for this target machine.
XXX FreeBSD, by convention, shouldn't do __alpha, but lots of applications
expect it because that's what OSF/1 does. */
#undef CPP_PREDEFINES
#define CPP_PREDEFINES \
"-D__alpha__ -D__alpha -Acpu(alpha) -Amachine(alpha)" \
FBSD_CPP_PREDEFINES
#undef LINK_SPEC
#define LINK_SPEC "-m elf64alpha \
%{p:%e`-p' not supported; use `-pg' and gprof(1)} \
%{Wl,*:%*} \
%{assert*} %{R*} %{rpath*} %{defsym*} \
%{shared:-Bshareable %{h*} %{soname*}} \
%{symbolic:-Bsymbolic} \
%{!shared: \
%{!static: \
%{rdynamic:-export-dynamic} \
%{!dynamic-linker:-dynamic-linker /usr/libexec/ld-elf.so.1}} \
%{static:-Bstatic}}"
/* Provide an ASM_SPEC appropriate for a FreeBSD/Alpha target. This differs
from the generic FreeBSD ASM_SPEC in that no special handling of PIC is
necessary on the Alpha. */
#undef ASM_SPEC
#define ASM_SPEC " %| %{mcpu=*:-m%*}"
#undef ASM_FINAL_SPEC
/* Provide a STARTFILE_SPEC for FreeBSD that is compatible with the
non-aout version used on i386. */
#undef STARTFILE_SPEC
#define STARTFILE_SPEC \
"%{!shared: %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}} \
crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
/* 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 \
"%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
/************************[ Target stuff ]***********************************/
/* Define the actual types of some ANSI-mandated types.
Needs to agree with <machine/ansi.h>. GCC defaults come from c-decl.c,
c-common.c, and config/<arch>/<arch>.h. */
/* alpha.h gets this wrong for FreeBSD. We use the GCC defaults instead. */
#undef WCHAR_TYPE
/* Handle cross-compilation on 32-bits machines (such as i386) for 64-bits
machines (Alpha in this case). */
#if defined(__i386__)
#undef HOST_BITS_PER_LONG
#define HOST_BITS_PER_LONG 32
#undef HOST_WIDE_INT
#define HOST_WIDE_INT long long
#undef HOST_BITS_PER_WIDE_INT
#define HOST_BITS_PER_WIDE_INT 64
#endif
/* This is the pseudo-op used to generate a 64-bit word of data with a
specific value in some section. */
#undef INT_ASM_OP
#define INT_ASM_OP ".quad"
#undef TARGET_VERSION
#define TARGET_VERSION fprintf (stderr, " (FreeBSD/Alpha ELF)");
#define TARGET_AOUT (0)
#define TARGET_ELF (1)
#define TARGET_UNDERSCORES (0)
#undef OBJECT_FORMAT_COFF
#undef EXTENDED_COFF
#undef TARGET_DEFAULT
#define TARGET_DEFAULT (MASK_FP | MASK_FPREGS | MASK_GAS)
#undef HAS_INIT_SECTION
/* Output assembler code to FILE to increment profiler label # LABELNO
for profiling a function entry. Under FreeBSD/Alpha, the assembler does
nothing special with -pg. */
#undef FUNCTION_PROFILER
#define FUNCTION_PROFILER(FILE, LABELNO) \
fputs ("\tjsr $28,_mcount\n", (FILE)) /* at */
/* Show that we need a GP when profiling. */
#undef TARGET_PROFILING_NEEDS_GP
#define TARGET_PROFILING_NEEDS_GP
/* We always use gas here, so we don't worry about ECOFF assembler problems. */
#undef TARGET_GAS
#define TARGET_GAS 1
/************************[ Assembler stuff ]********************************/
/* This is how to begin an assembly language file.
ELF also needs a .version. */
#undef ASM_FILE_START
#define ASM_FILE_START(FILE) \
{ \
alpha_write_verstamp (FILE); \
output_file_directive ((FILE), main_input_filename); \
fprintf ((FILE), "\t.version\t\"01.01\"\n"); \
fprintf ((FILE), "\t.set noat\n"); \
}
extern void output_file_directive ();
extern void alpha_output_lineno ();
#undef ASM_OUTPUT_SOURCE_LINE
#define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) \
alpha_output_lineno ((STREAM), (LINE))
/* 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. */
#undef ASM_OUTPUT_SECTION_NAME
#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. */
#undef SELECT_SECTION
#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 (); \
}
/* This is how we tell the assembler that two symbols have the same value. */
#undef ASM_OUTPUT_DEF
#define ASM_OUTPUT_DEF(FILE,NAME1,NAME2) \
do { \
assemble_name((FILE), (NAME1)); \
fputs(" = ", (FILE)); \
assemble_name((FILE), (NAME2)); \
fputc('\n', (FILE)); \
} while (0)
/************************[ Debugger stuff ]*********************************/
/* This is the char to use for continuation (in case we need to turn
continuation back on). */
#undef DBX_CONTIN_CHAR
#define DBX_CONTIN_CHAR '?'
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