Initial revision

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@232 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 322 insertions, 0 deletions

diff --git a/gcc/config/svr3.h b/gcc/config/svr3.h
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+/* 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@ncd.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, 675 Mass Ave, Cambridge, MA 02139, 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 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 hsould 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)
+
+/* 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.  */
+
+/* The support for constructors and destructors depends on two
+   machine-specific macros that the individual tm.h file has to define:
+
+   CTORS_SECTION_ASM_OP should be defined to concatenate
+   the macro INIT_SECTION_ASM_OP, a newline, and a push instruction
+   to push a word containing 0 (or some equivalent of that).
+
+   ASM_OUTPUT_CONSTRUCTOR should be defined
+   to push the address of the constructor.  */
+
+#define USE_CONST_SECTION	0
+
+#define INIT_SECTION_ASM_OP     "\t.section\t.init"
+#define FINI_SECTION_ASM_OP     ".section .fini,\"x\""
+#define CONST_SECTION_ASM_OP	"\t.section\t.rodata, \"x\""
+
+#define DTORS_SECTION_ASM_OP    FINI_SECTION_ASM_OP
+/* CTORS_SECTION_ASM_OP is machine-dependent
+   because it pushes on the stack.  */
+
+#define DO_GLOBAL_CTORS_BODY						\
+do {									\
+  func_ptr *__CTOR_LIST__ = __builtin_alloca (0), *p;			\
+  for (p = __CTOR_LIST__; *p; )						\
+    (*p++) ();								\
+} while (0)
+
+/* 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 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;						\
+    }									\
+}
+
+#if 0
+#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;						\
+    }									\
+}
+#endif
+
+/* 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))		\
+	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()