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/* Definitions of target machine for GNU compiler, for HPs running
HPUX using the 64bit runtime model.
Copyright (C) 1999, 2000 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, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* We can debug dynamically linked executables on hpux11; we also
want dereferencing of a NULL pointer to cause a SEGV. */
#undef LINK_SPEC
#define LINK_SPEC \
"-E %{mlinker-opt:-O} %{!shared:-u main} %{static:-a archive} %{shared:-shared}"
/* Like the default, except no -lg. */
#undef LIB_SPEC
#define LIB_SPEC \
"%{!shared:\
%{!p:\
%{!pg:\
%{!threads:-lc}\
%{threads:-lcma -lc_r}}\
%{p: -L/lib/libp/ -lc}\
%{pg: -L/lib/libp/ -lc}}} /usr/lib/pa20_64/milli.a"
/* Under hpux11, the normal location of the `ld' and `as' programs is the
/usr/ccs/bin directory. */
#ifndef CROSS_COMPILE
#undef MD_EXEC_PREFIX
#define MD_EXEC_PREFIX "/opt/langtools/bin"
#endif
/* Under hpux11 the normal location of the various *crt*.o files is the
/usr/ccs/lib directory. */
#ifndef CROSS_COMPILE
#undef MD_STARTFILE_PREFIX
#define MD_STARTFILE_PREFIX "/opt/langtools/lib/pa20_64/"
#endif
/* hpux11 has the new HP assembler. It's still lousy, but it's a whole lot
better than the assembler shipped with older versions of hpux. */
#undef NEW_HP_ASSEMBLER
#define NEW_HP_ASSEMBLER 1
#undef ASM_FILE_START
#define ASM_FILE_START(FILE) \
do { \
if (TARGET_64BIT) \
fputs("\t.LEVEL 2.0w\n", FILE); \
else if (TARGET_PA_20) \
fputs("\t.LEVEL 2.0\n", FILE); \
else if (TARGET_PA_11) \
fputs("\t.LEVEL 1.1\n", FILE); \
else \
fputs("\t.LEVEL 1.0\n", FILE); \
if (profile_flag)\
fprintf (FILE, "\t.IMPORT _mcount, CODE\n");\
if (write_symbols != NO_DEBUG) \
output_file_directive ((FILE), main_input_filename); \
} while (0)
/* It looks like DWARF2 will be the easiest debug format to handle on this
platform. */
#define OBJECT_FORMAT_ELF
#define DWARF2_DEBUGGING_INFO
#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
/* This isn't quite ready yet. I'm seeing it mess up some line
tables. For example, we're getting lines starting/ending at
impossible addresses. */
#define DWARF2_ASM_LINE_DEBUG_INFO 1
/* The rest of this file is copied from the generic svr4.h. One day we
would like to simply include svr4.h instead of copying all these
definitions. */
/* 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.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 "\t.section\t.ctors,\"aw\""
#define DTORS_SECTION_ASM_OP "\t.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. */
/* ??? For the time being, we aren't using init sections. */
#if 0
#define INIT_SECTION_ASM_OP "\t.section\t.init"
#define FINI_SECTION_ASM_OP "\t.section\t.fini"
#endif
/* 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
#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; \
} \
}
#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. */
#define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
#define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
#define UNIQUE_SECTION(DECL,RELOC) \
do { \
int len; \
char *name, *string, *prefix; \
\
name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL)); \
\
if (! DECL_ONE_ONLY (DECL)) \
{ \
prefix = "."; \
if (TREE_CODE (DECL) == FUNCTION_DECL) \
prefix = ".text."; \
else if (DECL_READONLY_SECTION (DECL, RELOC)) \
prefix = ".rodata."; \
else \
prefix = ".data."; \
} \
else if (TREE_CODE (DECL) == FUNCTION_DECL) \
prefix = ".gnu.linkonce.t."; \
else if (DECL_READONLY_SECTION (DECL, RELOC)) \
prefix = ".gnu.linkonce.r."; \
else \
prefix = ".gnu.linkonce.d."; \
\
len = strlen (name) + strlen (prefix); \
string = alloca (len + 1); \
sprintf (string, "%s%s", prefix, name); \
\
DECL_SECTION_NAME (DECL) = build_string (len, string); \
} while (0)
#define INT_ASM_OP "\t.dword\t"
/* 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, "%sP%%", 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, "%sP%%", INT_ASM_OP); \
assemble_name (FILE, NAME); \
fprintf (FILE, "\n"); \
} while (0)
/* ??? For the time being, we aren't using .ctors/.dtors sections. */
#undef ASM_OUTPUT_DESTRUCTOR
#undef ASM_OUTPUT_CONSTRUCTOR
/* 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 "\t.type\t"
#define SIZE_ASM_OP "\t.size\t"
/* This is how we tell the assembler that a symbol is weak. */
#define ASM_WEAKEN_LABEL(FILE,NAME) \
do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \
fputc ('\n', FILE); } while (0)
/* The following macro defines the format used to output the second
operand of the .type assembler directive. Different svr4 assemblers
expect various different forms for this operand. The one given here
is just a default. You may need to override it in your machine-
specific tm.h file (depending upon the particulars of your assembler). */
#define TYPE_OPERAND_FMT "@%s"
/* Write the extra assembler code needed to declare a function's result.
Most svr4 assemblers don't require any special declaration of the
result value, but there are exceptions. */
#ifndef ASM_DECLARE_RESULT
#define ASM_DECLARE_RESULT(FILE, RESULT)
#endif
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