184 lines
5.2 KiB
C++
184 lines
5.2 KiB
C++
/* Operating system specific defines to be used when targeting GCC for some
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embedded system running pSOS. We assume GNU tools with ELF, but
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try to maintain compatibility with the MRI tools. Based on svr4.h.
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Copyright (C) 1996 Free Software Foundation, Inc.
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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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To use this file, make up a file with a name like:
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?????-psos.h
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where ????? is replaced by the name of the basic hardware that you
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are targeting for. Then, in the file ?????-psos.h, put something
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like:
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#include "?????.h"
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#include "psos.h"
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followed by any really system-specific defines (or overrides of
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defines) which you find that you need.
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*/
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/* Define a symbol indicating that we are using psos.h. */
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#define USING_PSOS_H
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/* All pSOS targets currently use the ELF object file format. */
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#define OBJECT_FORMAT_ELF
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/* Provide a NULL STARTFILE_SPEC. The startfile cannot be specified
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here because it depends on the architecture (e.g. 68K), the
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board-support package (e.g. M162) and the run-time configuration
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(e.g. application vs. ram-image vs. rom-image). Specify the
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startfile in a linker-script created from the generic
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architecture-specific linker-scripts. */
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#undef STARTFILE_SPEC
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#define STARTFILE_SPEC ""
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/* Predefined macros (independent of processor type). */
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#define CPP_PREDEFINES "-Dpsos"
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/* Implicit library calls should use ANSI memcpy rather than BSD
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bcopy, etc. */
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#define TARGET_MEM_FUNCTIONS
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/* When using stabs, gcc2_compiled must be a stabs entry, not an
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ordinary symbol, or gdb won't see it. The stabs entry must be
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before the N_SO in order for gdb to find it. */
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#define ASM_IDENTIFY_GCC(FILE) \
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do \
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{ \
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fputs (".stabs \"gcc2_compiled.\", 0x3c, 0, 0, 0\n", FILE); \
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} \
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while (0)
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/* This is how we tell the assembler that a symbol is weak. */
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#define ASM_WEAKEN_LABEL(FILE,NAME) \
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do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \
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fputc ('\n', FILE); } while (0)
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/* Switch into a generic section. */
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#define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME, RELOC) \
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fprintf (FILE, ".section\t%s,\"%s\",@progbits\n", NAME, \
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(DECL) && TREE_CODE (DECL) == FUNCTION_DECL ? "ax" : \
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(DECL) && DECL_READONLY_SECTION (DECL, RELOC) ? "a" : "aw")
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/* Define the pseudo-ops used to switch to the .ctors and .dtors
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sections. */
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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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/* 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
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should override this definition in the target-specific file which
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includes this file. */
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#undef EXTRA_SECTIONS
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#define EXTRA_SECTIONS in_ctors, in_dtors
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/* A default list of extra section function definitions. For targets
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that use additional sections (e.g. .tdesc) you should override this
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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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CTORS_SECTION_FUNCTION \
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DTORS_SECTION_FUNCTION
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extern void text_section ();
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#define CTORS_SECTION_FUNCTION \
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void \
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ctors_section () \
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{ \
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if (in_section != in_ctors) \
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{ \
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fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP); \
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in_section = in_ctors; \
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} \
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}
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#define DTORS_SECTION_FUNCTION \
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void \
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dtors_section () \
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{ \
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if (in_section != in_dtors) \
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{ \
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fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP); \
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in_section = in_dtors; \
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} \
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}
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/* A C statement (sans semicolon) to output an element in the table of
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global constructors. */
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#ifndef INT_ASM_OP
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#define INT_ASM_OP ".long"
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#endif
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#define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \
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do { \
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ctors_section (); \
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fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
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assemble_name (FILE, NAME); \
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fprintf (FILE, "\n"); \
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} while (0)
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/* A C statement (sans semicolon) to output an element in the table of
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global destructors. */
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#define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
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do { \
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dtors_section (); \
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fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
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assemble_name (FILE, NAME); \
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fprintf (FILE, "\n"); \
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} while (0)
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/* Use DBX debugging info by default. */
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#ifndef PREFERRED_DEBUGGING_TYPE
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#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
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#endif
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/* For pSOS we use DBX debugging info. */
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#define DBX_DEBUGGING_INFO
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/* Prevent generation of an exit function. */
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#define HAVE_ATEXIT
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