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Add an elf compiler spec.

This commit is contained in:
christos 1999-01-11 11:01:38 +00:00
parent e6ce4ee5c9
commit f9cf96d39c
1 changed files with 493 additions and 0 deletions
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gnu/dist/gcc/config/i386/netbsd-elf.h vendored Normal file
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/* Definitions of target machine for GNU compiler,
for i386 NetBSD systems.
Copyright (C) 1998 Free Software Foundation, Inc.
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 i386 platforms that use the ELF format.
This was taken from the NetBSD/alpha configuration, and modified
for NetBSD/i386 by Christos Zoulas <christos@netbsd.org> */
/* Get generic i386 definitions. */
/* This goes away when the math-emulator is fixed */
#define TARGET_CPU_DEFAULT 0400 /* TARGET_NO_FANCY_MATH_387 */
#include <i386/gstabs.h>
/* Get perform_* macros to build libgcc.a. */
#include <i386/perform.h>
/* Get generic NetBSD ELF definitions. We will override these if necessary. */
#define NETBSD_ELF
#include <netbsd.h>
#define OBJECT_FORMAT_ELF
/* This is BSD, so it wants DBX format. */
#if 0
#define DBX_DEBUGGING_INFO
/* This is the char to use for continuation (in case we need to turn
continuation back on). */
#define DBX_CONTIN_CHAR '?'
#endif
#undef ASM_FINAL_SPEC
/* Names to predefine in the preprocessor for this target machine.
XXX NetBSD, by convention, shouldn't do __alpha, but lots of applications
expect it because that's what OSF/1 does. */
/* NetBSD Extension to GNU C: __KPRINTF_ATTRIBUTE__ */
#undef CPP_PREDEFINES
#define CPP_PREDEFINES "\
-Di386 -D__NetBSD__ -D__ELF__ -D__KPRINTF_ATTRIBUTE__ \
-Asystem(unix) -Asystem(NetBSD) -Acpu(i386) -Amachine(i386)"
/* Make gcc agree with <machine/ansi.h> */
#undef SIZE_TYPE
#define SIZE_TYPE "unsigned int"
#undef PTRDIFF_TYPE
#define PTRDIFF_TYPE "int"
#undef WCHAR_TYPE
#define WCHAR_TYPE "int"
#undef WCHAR_UNSIGNED
#define WCHAR_UNSIGNED 0
#undef WCHAR_TYPE_SIZE
#define WCHAR_TYPE_SIZE 32
/* Output assembler code to FILE to increment profiler label # LABELNO
for profiling a function entry. Under NetBSD/i386, the assembler does
nothing special with -pg. */
#undef ASM_APP_ON
#define ASM_APP_ON "#APP\n"
#undef ASM_APP_OFF
#define ASM_APP_OFF "#NO_APP\n"
#define bsd4_4
#undef HAS_INIT_SECTION
#undef ASM_FILE_START
#define ASM_FILE_START(FILE) \
{ \
output_file_directive (FILE, main_input_filename); \
fprintf (FILE, "\t.version\t\"01.01\"\n"); \
}
/* Provide a LINK_SPEC appropriate for a NetBSD/alpha ELF target. Only
the linker emulation is i386-specific. The rest are
common to all ELF targets, except for the name of the start function. */
#undef LINK_SPEC
#define LINK_SPEC \
"-m elf_i386 \
%{assert*} %{R*} \
%{shared:-shared} \
%{!shared: \
-dc -dp \
%{!nostdlib:%{!r*:%{!e*:-e __start}}} \
%{!static: \
%{rdynamic:-export-dynamic} \
%{!dynamic-linker:-dynamic-linker /usr/libexec/ld.elf_so}} \
%{static:-static}}"
#undef DEFAULT_VTABLE_THUNKS
#define DEFAULT_VTABLE_THUNKS 1
/* Attach a special .ident directive to the end of the file to identify
the version of GCC which compiled this code. The format of the
.ident string is patterned after the ones produced by native svr4
C compilers. */
/* Output #ident as a .ident. */
/* This is how to allocate empty space in some section. The .zero
pseudo-op is used for this on most svr4 assemblers. */
#undef SKIP_ASM_OP
#define SKIP_ASM_OP "\t.zero"
#undef ASM_OUTPUT_SKIP
#define ASM_OUTPUT_SKIP(FILE,SIZE) \
fprintf (FILE, "\t%s\t%u\n", SKIP_ASM_OP, (SIZE))
/* Output the label which precedes a jumptable. Note that for all svr4
systems where we actually generate jumptables (which is to say every
svr4 target except i386, where we use casesi instead) we put the jump-
tables into the .rodata section and since other stuff could have been
put into the .rodata section prior to any given jumptable, we have to
make sure that the location counter for the .rodata section gets pro-
perly re-aligned prior to the actual beginning of the jump table. */
#define ALIGN_ASM_OP ".align"
#ifndef ASM_OUTPUT_BEFORE_CASE_LABEL
#define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \
ASM_OUTPUT_ALIGN ((FILE), 2);
#endif
#undef ASM_OUTPUT_CASE_LABEL
#define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,JUMPTABLE) \
do { \
ASM_OUTPUT_BEFORE_CASE_LABEL (FILE, PREFIX, NUM, JUMPTABLE) \
ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); \
} while (0)
/* The standard SVR4 assembler seems to require that certain builtin
library routines (e.g. .udiv) be explicitly declared as .globl
in each assembly file where they are referenced. */
#define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
ASM_GLOBALIZE_LABEL (FILE, XSTR (FUN, 0))
/* This says how to output assembler code to declare an
uninitialized external linkage data object. Under SVR4,
the linker seems to want the alignment of data objects
to depend on their types. We do exactly that here. */
#define COMMON_ASM_OP ".comm"
#undef ASM_OUTPUT_ALIGN
#define ASM_OUTPUT_ALIGN(FILE,LOG) \
if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", 1 << (LOG))
#undef ASM_OUTPUT_ALIGNED_COMMON
#define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
do { \
fprintf ((FILE), "\t%s\t", COMMON_ASM_OP); \
assemble_name ((FILE), (NAME)); \
fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT); \
} while (0)
/* This says how to output assembler code to declare an
uninitialized internal linkage data object. Under SVR4,
the linker seems to want the alignment of data objects
to depend on their types. We do exactly that here. */
#define LOCAL_ASM_OP ".local"
#undef ASM_OUTPUT_ALIGNED_LOCAL
#define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
do { \
fprintf ((FILE), "\t%s\t", LOCAL_ASM_OP); \
assemble_name ((FILE), (NAME)); \
fprintf ((FILE), "\n"); \
ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN); \
} while (0)
/* This is the pseudo-op used to generate a 64-bit word of data with a
specific value in some section. */
#define INT_ASM_OP ".quad"
/* This is the pseudo-op used to generate a contiguous sequence of byte
values from a double-quoted string WITHOUT HAVING A TERMINATING NUL
AUTOMATICALLY APPENDED. This is the same for most svr4 assemblers. */
#undef ASCII_DATA_ASM_OP
#define ASCII_DATA_ASM_OP ".ascii"
/* 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 ".section\t.rodata"
/* 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 ".section\t.ctors,\"aw\""
#define DTORS_SECTION_ASM_OP ".section\t.dtors,\"aw\""
/* 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
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. */
#define INIT_SECTION_ASM_OP ".section\t.init"
#define FINI_SECTION_ASM_OP ".section\t.fini"
/* 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, in_ctors, in_dtors
/* 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 \
CTORS_SECTION_FUNCTION \
DTORS_SECTION_FUNCTION
#undef READONLY_DATA_SECTION
#define READONLY_DATA_SECTION() const_section ()
extern void text_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; \
} \
}
#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; \
} \
}
/* 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)
#if 0
#undef PREFERRED_DEBUGGING_TYPE
#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
#endif
/* The following macros are stolen from i386v4.h */
/* These have to be defined to get PIC code correct */
/* This is how to output an element of a case-vector that is relative.
This is only used for PIC code. See comments by the `casesi' insn in
i386.md for an explanation of the expression this outputs. */
#undef ASM_OUTPUT_ADDR_DIFF_ELT
#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
fprintf (FILE, "\t.long _GLOBAL_OFFSET_TABLE_+[.-%s%d]\n", LPREFIX, VALUE)
/* Indicate that jump tables go in the text section. This is
necessary when compiling PIC code. */
#define JUMP_TABLES_IN_TEXT_SECTION 1
/* Default to pcc-struct-return, because this is the ELF abi and
we don't care about compatibility with older gcc versions. */
#define DEFAULT_PCC_STRUCT_RETURN 1
/* Profiling routines, partially copied from i386/osfrose.h. */
/* Redefine this to use %eax instead of %edx. */
#undef FUNCTION_PROFILER
#define FUNCTION_PROFILER(FILE, LABELNO) \
{ \
if (flag_pic) \
{ \
fprintf (FILE, "\tcall mcount@PLT\n"); \
} \
else \
{ \
fprintf (FILE, "\tcall mcount\n"); \
} \
}
/* Put relocations in the constant pool in the writable data section. */
#undef SELECT_RTX_SECTION
#define SELECT_RTX_SECTION(MODE,RTX) \
{ \
if (flag_pic && symbolic_operand (RTX)) \
data_section (); \
else \
readonly_data_section (); \
}