200 lines
6.8 KiB
C
200 lines
6.8 KiB
C
/* Definitions of target machine for GNU compiler, for DEC Alpha
|
|
running Windows/NT.
|
|
Copyright (C) 1995, 1996, 1999, 2000 Free Software Foundation, Inc.
|
|
|
|
Donn Terry, Softway Systems, Inc.
|
|
From code
|
|
Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu)
|
|
|
|
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, 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
/* cpp handles __STDC__ */
|
|
/* The three "Alpha" defines on the first such line are from the CLAXP spec */
|
|
#undef CPP_PREDEFINES
|
|
#define CPP_PREDEFINES " \
|
|
-D__INTERIX \
|
|
-D__OPENNT \
|
|
-D__Alpha_AXP -D_M_ALPHA -D_ALPHA_ \
|
|
-D__alpha -D__alpha__\
|
|
-D__stdcall= \
|
|
-D__cdecl= \
|
|
-Asystem=unix -Asystem=interix -Acpu=alpha -Amachine=alpha"
|
|
|
|
#undef CPP_SUBTARGET_SPEC
|
|
#define CPP_SUBTARGET_SPEC "\
|
|
-remap \
|
|
%{posix:-D_POSIX_SOURCE} \
|
|
-isystem %$INTERIX_ROOT/usr/include"
|
|
|
|
#undef TARGET_VERSION
|
|
#define TARGET_VERSION fprintf (stderr, " (alpha Interix)");
|
|
|
|
/* alpha.h sets this, but it doesn't apply to us */
|
|
#undef OBJECT_FORMAT_ECOFF
|
|
#undef OBJECT_FORMAT_COFF
|
|
|
|
/* LINK_SPEC */
|
|
|
|
/* MD_STARTFILE_PREFIX */
|
|
|
|
/* ASM_OUTPUT_LOOP_ALIGN; ASM_OUTPUT_ALIGN_CODE */
|
|
|
|
/* Codegen macro overrides for NT internal conventions */
|
|
|
|
/* the below are ecoff specific... we don't need them, so
|
|
undef them (they'll get a default later) */
|
|
|
|
#undef PUT_SDB_BLOCK_START
|
|
#undef PUT_SDB_BLOCK_END
|
|
|
|
/* The following are needed for C++, but also needed for profiling */
|
|
|
|
/* 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
|
|
|
|
#define CONST_SECTION_ASM_OP "\t.rdata"
|
|
|
|
/* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
|
|
|
|
Note that we want to give these sections the SHF_WRITE attribute
|
|
because these sections will actually contain data (i.e. tables of
|
|
addresses of functions in the current root executable or shared library
|
|
file) and, in the case of a shared library, the relocatable addresses
|
|
will have to be properly resolved/relocated (and then written into) by
|
|
the dynamic linker when it actually attaches the given shared library
|
|
to the executing process. (Note that on SVR4, you may wish to use the
|
|
`-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
|
|
use the `-z text' option when building a shared library, you will get
|
|
errors unless the .ctors and .dtors sections are marked as writable
|
|
via the SHF_WRITE attribute.) */
|
|
|
|
#define CTORS_SECTION_ASM_OP "\t.ctors"
|
|
#define DTORS_SECTION_ASM_OP "\t.dtors"
|
|
|
|
/* 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. */
|
|
|
|
#undef EXTRA_SECTIONS
|
|
#define EXTRA_SECTIONS in_const
|
|
|
|
/* 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. */
|
|
|
|
#undef EXTRA_SECTION_FUNCTIONS
|
|
#define EXTRA_SECTION_FUNCTIONS \
|
|
CONST_SECTION_FUNCTION
|
|
|
|
#undef READONLY_DATA_SECTION
|
|
#define READONLY_DATA_SECTION() const_section ()
|
|
|
|
#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; \
|
|
} \
|
|
}
|
|
|
|
/* The linker will take care of this, and having them causes problems with
|
|
ld -r (specifically -rU). */
|
|
#define CTOR_LISTS_DEFINED_EXTERNALLY 1
|
|
|
|
#define SET_ASM_OP "\t.set\t"
|
|
/* Output a definition (implements alias) */
|
|
#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
|
|
do \
|
|
{ \
|
|
fprintf ((FILE), "\t"); \
|
|
assemble_name (FILE, LABEL1); \
|
|
fprintf (FILE, "="); \
|
|
assemble_name (FILE, LABEL2); \
|
|
fprintf (FILE, "\n"); \
|
|
} \
|
|
while (0)
|
|
|
|
/* We use the defaults, so undef the null definitions */
|
|
#undef PUT_SDB_FUNCTION_START
|
|
#undef PUT_SDB_FUNCTION_END
|
|
#undef PUT_SDB_EPILOGUE_END
|
|
|
|
#define HOST_PTR_PRINTF "%p"
|
|
#define HOST_PTR_AS_INT unsigned long
|
|
|
|
#define PCC_BITFIELD_TYPE_MATTERS 1
|
|
#define PCC_BITFIELD_TYPE_TEST TYPE_NATIVE(rec)
|
|
#define GROUP_BITFIELDS_BY_ALIGN TYPE_NATIVE(rec)
|
|
|
|
/* DWARF2 Unwinding doesn't work with exception handling yet. */
|
|
#undef DWARF2_UNWIND_INFO
|
|
#define DWARF2_UNWIND_INFO 0
|
|
|
|
/* Don't assume anything about the header files. */
|
|
#define NO_IMPLICIT_EXTERN_C
|
|
|
|
/* The definition of this macro implies that there are cases where
|
|
a scalar value cannot be returned in registers.
|
|
|
|
On NT (according to the spec) anything except strings/array that fits
|
|
in 64 bits is returned in the registers (this appears to differ from
|
|
the rest of the Alpha family). */
|
|
|
|
#undef RETURN_IN_MEMORY
|
|
#define RETURN_IN_MEMORY(TYPE) \
|
|
(TREE_CODE (TYPE) == ARRAY_TYPE || int_size_in_bytes(TYPE) > 8)
|
|
|
|
#define ASM_LOAD_ADDR(loc, reg) " lda " #reg "," #loc "\n"
|
|
|
|
#undef ASM_FILE_START
|
|
#define ASM_FILE_START(FILE) \
|
|
{ \
|
|
alpha_write_verstamp (FILE); \
|
|
fprintf (FILE, "\t.set noreorder\n"); \
|
|
fprintf (FILE, "\t.set volatile\n"); \
|
|
fprintf (FILE, "\t.set noat\n"); \
|
|
fprintf (FILE, "\t.globl\t__fltused\n"); \
|
|
ASM_OUTPUT_SOURCE_FILENAME (FILE, main_input_filename); \
|
|
}
|
|
|
|
/* The current Interix assembler (consistent with the DEC documentation)
|
|
uses a=b NOT .set a,b; .set is for assembler options. */
|
|
#undef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
|
|
#define ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL(FILE, SY, HI, LO) \
|
|
do { \
|
|
assemble_name (FILE, SY); \
|
|
fputc ('=', FILE); \
|
|
assemble_name (FILE, HI); \
|
|
fputc ('-', FILE); \
|
|
assemble_name (FILE, LO); \
|
|
} while (0)
|