386 lines
12 KiB
C
386 lines
12 KiB
C
|
/* svr3.h -- operating system specific defines to be used when
|
||
|
|
targeting GCC for some generic System V Release 3 system.
|
||
|
|
Copyright (C) 1991 Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
Written by Ron Guilmette (rfg@netcom.com).
|
||
|
|
|
||
|
|
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.
|
||
|
|
|
||
|
|
To use this file, make up a file with a name like:
|
||
|
|
|
||
|
|
?????svr3.h
|
||
|
|
|
||
|
|
where ????? is replaced by the name of the basic hardware that you
|
||
|
|
are targeting for. Then, in the file ?????svr3.h, put something
|
||
|
|
like:
|
||
|
|
|
||
|
|
#include "?????.h"
|
||
|
|
#include "svr3.h"
|
||
|
|
|
||
|
|
followed by any really system-specific defines (or overrides of
|
||
|
|
defines) which you find that you need. For example, CPP_PREDEFINES
|
||
|
|
is defined here with only the defined -Dunix and -DSVR3. You should
|
||
|
|
probably override that in your target-specific ?????svr3.h file
|
||
|
|
with a set of defines that includes these, but also contains an
|
||
|
|
appropriate define for the type of hardware that you are targeting.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Define a symbol indicating that we are using svr3.h. */
|
||
|
|
#define USING_SVR3_H
|
||
|
|
|
||
|
|
/* Define a symbol so that libgcc* can know what sort of operating
|
||
|
|
environment and assembler syntax we are targeting for. */
|
||
|
|
#define SVR3_target
|
||
|
|
|
||
|
|
/* Cpp, assembler, linker, library, and startfile spec's. */
|
||
|
|
|
||
|
|
/* You should redefine CPP_PREDEFINES in any file which includes this one.
|
||
|
|
The definition should be appropriate for the type of target system
|
||
|
|
involved, and it should include any -A (assertion) options which are
|
||
|
|
appropriate for the given target system. */
|
||
|
|
|
||
|
|
#undef CPP_PREDEFINES
|
||
|
|
|
||
|
|
/* Output at beginning of assembler file. */
|
||
|
|
/* The .file command should always begin the output. */
|
||
|
|
|
||
|
|
#undef ASM_FILE_START
|
||
|
|
#define ASM_FILE_START(FILE) \
|
||
|
|
do { output_file_directive ((FILE), main_input_filename); \
|
||
|
|
if (optimize) ASM_FILE_START_1 (FILE); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
/* By default, do nothing: a few machines support .optim, but not most. */
|
||
|
|
#undef ASM_FILE_START_1
|
||
|
|
#define ASM_FILE_START_1(FILE)
|
||
|
|
|
||
|
|
/* This says how to output an assembler line
|
||
|
|
to define a global common symbol. */
|
||
|
|
/* We don't use ROUNDED because the standard compiler doesn't,
|
||
|
|
and the linker gives error messages if a common symbol
|
||
|
|
has more than one length value. */
|
||
|
|
|
||
|
|
#undef ASM_OUTPUT_COMMON
|
||
|
|
#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
|
||
|
|
( fputs (".comm ", (FILE)), \
|
||
|
|
assemble_name ((FILE), (NAME)), \
|
||
|
|
fprintf ((FILE), ",%u\n", (SIZE)))
|
||
|
|
|
||
|
|
/* This says how to output an assembler line
|
||
|
|
to define a local common symbol. */
|
||
|
|
|
||
|
|
/* Note that using bss_section here caused errors
|
||
|
|
in building shared libraries on system V.3. */
|
||
|
|
#undef ASM_OUTPUT_LOCAL
|
||
|
|
#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
|
||
|
|
do { \
|
||
|
|
int align = exact_log2 (ROUNDED); \
|
||
|
|
if (align > 2) align = 2; \
|
||
|
|
data_section (); \
|
||
|
|
ASM_OUTPUT_ALIGN ((FILE), align == -1 ? 2 : align); \
|
||
|
|
ASM_OUTPUT_LABEL ((FILE), (NAME)); \
|
||
|
|
fprintf ((FILE), "\t.set .,.+%u\n", (ROUNDED)); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#if 0 /* For now, let's leave these machine-specific. */
|
||
|
|
/* Use crt1.o as a startup file and crtn.o as a closing file. */
|
||
|
|
|
||
|
|
#define STARTFILE_SPEC \
|
||
|
|
"%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}"
|
||
|
|
|
||
|
|
#define LIB_SPEC "%{p:-L/usr/lib/libp}%{pg:-L/usr/lib/libp} -lc crtn.o%s"
|
||
|
|
|
||
|
|
/* Special flags for the linker. I don't know what they do. */
|
||
|
|
|
||
|
|
#define LINK_SPEC "%{T*} %{z:-lm}"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Allow #sccs in preprocessor. */
|
||
|
|
|
||
|
|
#define SCCS_DIRECTIVE
|
||
|
|
|
||
|
|
/* Output #ident as a .ident. */
|
||
|
|
|
||
|
|
#define ASM_OUTPUT_IDENT(FILE, NAME) \
|
||
|
|
fprintf (FILE, "\t.ident \"%s\"\n", NAME);
|
||
|
|
|
||
|
|
/* Use periods rather than dollar signs in special g++ assembler names. */
|
||
|
|
|
||
|
|
#define NO_DOLLAR_IN_LABEL
|
||
|
|
|
||
|
|
/* Implicit library calls should use memcpy, not bcopy, etc. */
|
||
|
|
|
||
|
|
#define TARGET_MEM_FUNCTIONS
|
||
|
|
|
||
|
|
/* System V Release 3 uses COFF debugging info. */
|
||
|
|
|
||
|
|
#define SDB_DEBUGGING_INFO
|
||
|
|
|
||
|
|
/* We don't want to output DBX debugging information. */
|
||
|
|
|
||
|
|
#undef DBX_DEBUGGING_INFO
|
||
|
|
|
||
|
|
/* Define the actual types of some ANSI-mandated types. These
|
||
|
|
definitions should work for most SVR3 systems. */
|
||
|
|
|
||
|
|
#undef SIZE_TYPE
|
||
|
|
#define SIZE_TYPE "unsigned int"
|
||
|
|
|
||
|
|
#undef PTRDIFF_TYPE
|
||
|
|
#define PTRDIFF_TYPE "int"
|
||
|
|
|
||
|
|
#undef WCHAR_TYPE
|
||
|
|
#define WCHAR_TYPE "long int"
|
||
|
|
|
||
|
|
#undef WCHAR_TYPE_SIZE
|
||
|
|
#define WCHAR_TYPE_SIZE BITS_PER_WORD
|
||
|
|
|
||
|
|
/* Assembler pseudos to introduce constants of various size. These
|
||
|
|
definitions should work for most svr3 systems. */
|
||
|
|
|
||
|
|
#undef ASM_BYTE_OP
|
||
|
|
#define ASM_BYTE_OP "\t.byte"
|
||
|
|
|
||
|
|
/* This is how to output a reference to a user-level label named NAME.
|
||
|
|
`assemble_name' uses this.
|
||
|
|
|
||
|
|
For System V Release 3 the convention is to prepend a leading
|
||
|
|
underscore onto user-level symbol names. */
|
||
|
|
|
||
|
|
#undef ASM_OUTPUT_LABELREF
|
||
|
|
#define ASM_OUTPUT_LABELREF(FILE,NAME) fprintf (FILE, "_%s", NAME)
|
||
|
|
|
||
|
|
/* This is how to output an internal numbered label where
|
||
|
|
PREFIX is the class of label and NUM is the number within the class.
|
||
|
|
|
||
|
|
For most svr3 systems, the convention is that any symbol which begins
|
||
|
|
with a period is not put into the linker symbol table by the assembler. */
|
||
|
|
|
||
|
|
#undef ASM_OUTPUT_INTERNAL_LABEL
|
||
|
|
#define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM) \
|
||
|
|
asm_fprintf (FILE, "%0L%s%d:\n", PREFIX, NUM)
|
||
|
|
|
||
|
|
/* This is how to store into the string LABEL
|
||
|
|
the symbol_ref name of an internal numbered label where
|
||
|
|
PREFIX is the class of label and NUM is the number within the class.
|
||
|
|
This is suitable for output with `assemble_name'.
|
||
|
|
|
||
|
|
For most svr3 systems, the convention is that any symbol which begins
|
||
|
|
with a period is not put into the linker symbol table by the assembler. */
|
||
|
|
|
||
|
|
#undef ASM_GENERATE_INTERNAL_LABEL
|
||
|
|
#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
|
||
|
|
sprintf (LABEL, "*%s%s%d", LOCAL_LABEL_PREFIX, PREFIX, NUM)
|
||
|
|
|
||
|
|
/* We want local labels to start with period if made with asm_fprintf. */
|
||
|
|
#undef LOCAL_LABEL_PREFIX
|
||
|
|
#define LOCAL_LABEL_PREFIX "."
|
||
|
|
|
||
|
|
/* 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.
|
||
|
|
However, use of the const section is turned off by default
|
||
|
|
unless the specific tm.h file turns it on by defining
|
||
|
|
USE_CONST_SECTION as 1. */
|
||
|
|
|
||
|
|
/* Define a few machine-specific details of the implementation of
|
||
|
|
constructors.
|
||
|
|
|
||
|
|
The __CTORS_LIST__ goes in the .init section. Define CTOR_LIST_BEGIN
|
||
|
|
and CTOR_LIST_END to contribute to the .init section an instruction to
|
||
|
|
push a word containing 0 (or some equivalent of that).
|
||
|
|
|
||
|
|
Define ASM_OUTPUT_CONSTRUCTOR to push the address of the constructor. */
|
||
|
|
|
||
|
|
#define USE_CONST_SECTION 0
|
||
|
|
|
||
|
|
#define INIT_SECTION_ASM_OP ".section\t.init"
|
||
|
|
#define FINI_SECTION_ASM_OP ".section .fini,\"x\""
|
||
|
|
#define CONST_SECTION_ASM_OP ".section\t.rodata, \"x\""
|
||
|
|
#define CTORS_SECTION_ASM_OP INIT_SECTION_ASM_OP
|
||
|
|
#define DTORS_SECTION_ASM_OP FINI_SECTION_ASM_OP
|
||
|
|
|
||
|
|
/* CTOR_LIST_BEGIN and CTOR_LIST_END are machine-dependent
|
||
|
|
because they push on the stack. */
|
||
|
|
|
||
|
|
#ifndef STACK_GROWS_DOWNWARD
|
||
|
|
|
||
|
|
/* Constructor list on stack is in reverse order. Go to the end of the
|
||
|
|
list and go backwards to call constructors in the right order. */
|
||
|
|
#define DO_GLOBAL_CTORS_BODY \
|
||
|
|
do { \
|
||
|
|
func_ptr *p, *beg = alloca (0); \
|
||
|
|
for (p = beg; *p; p++) \
|
||
|
|
; \
|
||
|
|
while (p != beg) \
|
||
|
|
(*--p) (); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
/* Constructor list on stack is in correct order. Just call them. */
|
||
|
|
#define DO_GLOBAL_CTORS_BODY \
|
||
|
|
do { \
|
||
|
|
func_ptr *p, *beg = alloca (0); \
|
||
|
|
for (p = beg; *p; ) \
|
||
|
|
(*p++) (); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#endif /* STACK_GROWS_DOWNWARD */
|
||
|
|
|
||
|
|
/* Add extra sections .init and .fini, in addition to .bss from att386.h. */
|
||
|
|
|
||
|
|
#undef EXTRA_SECTIONS
|
||
|
|
#define EXTRA_SECTIONS in_const, in_bss, in_init, in_fini
|
||
|
|
|
||
|
|
#undef EXTRA_SECTION_FUNCTIONS
|
||
|
|
#define EXTRA_SECTION_FUNCTIONS \
|
||
|
|
CONST_SECTION_FUNCTION \
|
||
|
|
BSS_SECTION_FUNCTION \
|
||
|
|
INIT_SECTION_FUNCTION \
|
||
|
|
FINI_SECTION_FUNCTION
|
||
|
|
|
||
|
|
#define BSS_SECTION_FUNCTION \
|
||
|
|
void \
|
||
|
|
bss_section () \
|
||
|
|
{ \
|
||
|
|
if (in_section != in_bss) \
|
||
|
|
{ \
|
||
|
|
fprintf (asm_out_file, "\t%s\n", BSS_SECTION_ASM_OP); \
|
||
|
|
in_section = in_bss; \
|
||
|
|
} \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define INIT_SECTION_FUNCTION \
|
||
|
|
void \
|
||
|
|
init_section () \
|
||
|
|
{ \
|
||
|
|
if (in_section != in_init) \
|
||
|
|
{ \
|
||
|
|
fprintf (asm_out_file, "\t%s\n", INIT_SECTION_ASM_OP); \
|
||
|
|
in_section = in_init; \
|
||
|
|
} \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define FINI_SECTION_FUNCTION \
|
||
|
|
void \
|
||
|
|
fini_section () \
|
||
|
|
{ \
|
||
|
|
if (in_section != in_fini) \
|
||
|
|
{ \
|
||
|
|
fprintf (asm_out_file, "\t%s\n", FINI_SECTION_ASM_OP); \
|
||
|
|
in_section = in_fini; \
|
||
|
|
} \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define READONLY_DATA_SECTION() const_section ()
|
||
|
|
|
||
|
|
#define CONST_SECTION_FUNCTION \
|
||
|
|
void \
|
||
|
|
const_section () \
|
||
|
|
{ \
|
||
|
|
extern void text_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 ctors and dtors sections are not normally put into use
|
||
|
|
by EXTRA_SECTIONS and EXTRA_SECTION_FUNCTIONS as defined in svr3.h,
|
||
|
|
but it can't hurt to define these macros for whatever systems use them. */
|
||
|
|
#define CTORS_SECTION_FUNCTION \
|
||
|
|
void \
|
||
|
|
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; \
|
||
|
|
} \
|
||
|
|
}
|
||
|
|
|
||
|
|
/* This is machine-dependent
|
||
|
|
because it needs to push something on the stack. */
|
||
|
|
#undef ASM_OUTPUT_CONSTRUCTOR
|
||
|
|
|
||
|
|
/* A C statement (sans semicolon) to output an element in the table of
|
||
|
|
global destructors. */
|
||
|
|
#define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
|
||
|
|
do { \
|
||
|
|
fini_section (); \
|
||
|
|
fprintf (FILE, "%s\t ", ASM_LONG); \
|
||
|
|
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 ((0 && RELOC) /* should be (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. */
|
||
|
|
|
||
|
|
#define SELECT_RTX_SECTION(MODE,RTX) const_section()
|