Appleid arm-elf contribution from Philip Blundell and merged with Catherine

Moore's work.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@23364 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 331 insertions, 0 deletions

diff --git a/gcc/config/arm/elf.h b/gcc/config/arm/elf.h
new file mode 100644
index 00000000000..a8aaf76d2e7
--- /dev/null
+++ b/gcc/config/arm/elf.h
@@ -0,0 +1,331 @@
+/* Definitions of target machine for GNU compiler,
+   for ARM with ELF obj format.
+   Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
+   Contributed by Philip Blundell <philb@gnu.org> and
+   Catherine Moore <clm@cygnus.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.  */
+
+
+#define OBJECT_FORMAT_ELF
+
+#ifndef LOCAL_LABEL_PREFIX
+#define LOCAL_LABEL_PREFIX "."
+#endif
+
+#ifndef USER_LABEL_PREFIX
+#define USER_LABEL_PREFIX ""
+#endif
+
+#ifndef CPP_PREDEFINES
+#define CPP_PREDEFINES "-Darm -Darm_elf -Acpu(arm) -Amachine(arm) -D__ELF__"
+#endif
+
+/* 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
+
+/* These macros generate the special .type and .size directives which
+   are used to set the corresponding fields of the linker symbol table
+   entries in an ELF object file under SVR4.  These macros also output
+   the starting labels for the relevant functions/objects.  */
+#define TYPE_ASM_OP     ".type"
+#define SIZE_ASM_OP     ".size"
+
+/* Write the extra assembler code needed to declare a function properly.
+   Some svr4 assemblers need to also have something extra said about the
+   function's return value.  We allow for that here.  */
+#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)			\
+  do {									\
+    fprintf (FILE, "\t%s\t ", TYPE_ASM_OP);				\
+    assemble_name (FILE, NAME);						\
+    putc (',', FILE);							\
+    fprintf (FILE, TYPE_OPERAND_FMT, "function");			\
+    putc ('\n', FILE);							\
+    ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL));			\
+    ASM_OUTPUT_LABEL(FILE, NAME);					\
+  } while (0)
+
+/* Write the extra assembler code needed to declare an object properly.  */
+#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)			\
+  do {									\
+    fprintf (FILE, "\t%s\t ", TYPE_ASM_OP);				\
+    assemble_name (FILE, NAME);						\
+    putc (',', FILE);							\
+    fprintf (FILE, TYPE_OPERAND_FMT, "object");				\
+    putc ('\n', FILE);							\
+    size_directive_output = 0;						\
+    if (!flag_inhibit_size_directive && DECL_SIZE (DECL))		\
+      {									\
+	size_directive_output = 1;					\
+	fprintf (FILE, "\t%s\t ", SIZE_ASM_OP);				\
+	assemble_name (FILE, NAME);					\
+	putc (',', FILE);						\
+	fprintf (FILE, HOST_WIDE_INT_PRINT_DEC,				\
+		 int_size_in_bytes (TREE_TYPE (DECL)));			\
+	fputc ('\n', FILE);						\
+      }									\
+    ASM_OUTPUT_LABEL(FILE, NAME);					\
+  } while (0)
+
+/* Output the size directive for a decl in rest_of_decl_compilation
+   in the case where we did not do so before the initializer.
+   Once we find the error_mark_node, we know that the value of
+   size_directive_output was set
+   by ASM_DECLARE_OBJECT_NAME when it was run for the same decl.  */
+#define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)	 \
+do {									 \
+     char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);			 \
+     if (!flag_inhibit_size_directive && DECL_SIZE (DECL)		 \
+         && ! AT_END && TOP_LEVEL					 \
+	 && DECL_INITIAL (DECL) == error_mark_node			 \
+	 && !size_directive_output)					 \
+       {								 \
+	 size_directive_output = 1;					 \
+	 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP);			 \
+	 assemble_name (FILE, name);					 \
+	 putc (',', FILE);						 \
+	 fprintf (FILE, HOST_WIDE_INT_PRINT_DEC,			 \
+		  int_size_in_bytes (TREE_TYPE (DECL))); 		 \
+	fputc ('\n', FILE);						 \
+       }								 \
+   } while (0)
+
+/* This is how to declare the size of a function.  */
+#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)			\
+  do {									\
+    if (!flag_inhibit_size_directive)					\
+      {									\
+        char label[256];						\
+	static int labelno;						\
+	labelno ++;							\
+	ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno);		\
+	ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno);		\
+	fprintf (FILE, "\t%s\t ", SIZE_ASM_OP);				\
+	assemble_name (FILE, (FNAME));					\
+        fprintf (FILE, ",");						\
+	assemble_name (FILE, label);					\
+        fprintf (FILE, "-");						\
+	assemble_name (FILE, (FNAME));					\
+	putc ('\n', FILE);						\
+      }									\
+  } while (0)
+
+/* Define this macro if jump tables (for `tablejump' insns) should be
+   output in the text section, along with the assembler instructions.
+   Otherwise, the readonly data section is used.  */
+#define JUMP_TABLES_IN_TEXT_SECTION 1
+
+#ifndef ASM_SPEC
+#define ASM_SPEC "%{mbig-endian:-EB} %{mcpu=*:-m%*} %{march=*:-m%*} \
+ %{mapcs-*:-mapcs-%*} %{mthumb-interwork:-mthumb-interwork}"
+#endif
+
+#ifndef LINK_SPEC
+#define LINK_SPEC "%{mbig-endian:-EB} -X"
+#endif
+  
+/* Run-time Target Specification.  */
+#ifndef TARGET_VERSION
+#define TARGET_VERSION fputs (" (ARM/elf)", stderr)
+#endif
+
+#ifndef TARGET_DEFAULT
+#define TARGET_DEFAULT (ARM_FLAG_SOFT_FLOAT | ARM_FLAG_APCS_32)
+#endif
+
+#ifndef MULTILIB_DEFAULTS
+#define MULTILIB_DEFAULTS { "mlittle-endian", "msoft-float", "mapcs-32", "mno-thumb-interwork" }
+#endif
+
+/* Setting this to 32 produces more efficient code, but the value set in previous
+   versions of this toolchain was 8, which produces more compact structures. The
+   command line option -mstructure_size_boundary=<n> can be used to change this
+   value.  */
+#undef  STRUCTURE_SIZE_BOUNDARY
+#define STRUCTURE_SIZE_BOUNDARY arm_structure_size_boundary
+
+extern int arm_structure_size_boundary;
+
+/* A C expression whose value is nonzero if IDENTIFIER with arguments ARGS
+   is a valid machine specific attribute for DECL.
+   The attributes in ATTRIBUTES have previously been assigned to DECL.  */
+extern int arm_valid_machine_decl_attribute ();
+#define VALID_MACHINE_DECL_ATTRIBUTE(DECL, ATTRIBUTES, IDENTIFIER, ARGS) \
+arm_valid_machine_decl_attribute (DECL, ATTRIBUTES, IDENTIFIER, ARGS)
+
+
+/* A C statement to output assembler commands which will identify the
+   object file as having been compiled with GNU CC (or another GNU
+   compiler).  */
+/* Define this to NULL so we don't get anything.
+   We have ASM_IDENTIFY_LANGUAGE.
+   Also, when using stabs, gcc2_compiled must be a stabs entry, not an
+   ordinary symbol, or gdb won't see it.  The stabs entry must be
+   before the N_SO in order for gdb to find it.  */
+#ifndef ASM_IDENTIFY_GCC
+#define ASM_IDENTIFY_GCC(STREAM) 				\
+     fprintf (STREAM, "%sgcc2_compiled.:\n", LOCAL_LABEL_PREFIX )
+#endif
+
+/* This outputs a lot of .req's to define alias for various registers.
+   Let's try to avoid this.  */
+#ifndef ASM_FILE_START
+#define ASM_FILE_START(STREAM) \
+do {								\
+  extern char *version_string;					\
+  fprintf (STREAM, "%s Generated by gcc %s for ARM/elf\n",	\
+	   ASM_COMMENT_START, version_string);			\
+} while (0)
+#endif
+     
+/* Output an internal label definition.  */
+#ifndef ASM_OUTPUT_INTERNAL_LABEL
+#define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM)  	\
+  do                                    	      	   	\
+    {						      	   	\
+      char *s = (char *) alloca (40 + strlen (PREFIX));	   	\
+      extern int arm_target_label, arm_ccfsm_state;	   	\
+      extern rtx arm_target_insn;				\
+						           	\
+      if (arm_ccfsm_state == 3 && arm_target_label == (NUM)   	\
+	&& !strcmp (PREFIX, "L"))				\
+	{							\
+	  arm_ccfsm_state = 0;				        \
+	  arm_target_insn = NULL;				\
+	}							\
+	ASM_GENERATE_INTERNAL_LABEL (s, (PREFIX), (NUM));   	\
+	ASM_OUTPUT_LABEL (STREAM, s);	                	\
+    } while (0)
+#endif
+
+/* Support the ctors/dtors and other sections.  */
+
+/* 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.)  */
+#ifndef CTORS_SECTION_ASM_OP
+#define CTORS_SECTION_ASM_OP	"\t.section\t.ctors,\"aw\""
+#endif
+     
+#ifndef DTORS_SECTION_ASM_OP
+#define DTORS_SECTION_ASM_OP	"\t.section\t.dtors,\"aw\""
+#endif
+
+/* A list of other sections which the compiler might be "in" at any
+   given time.  */
+#ifndef SUBTARGET_EXTRA_SECTIONS
+#define SUBTARGET_EXTRA_SECTIONS
+#endif
+
+#ifndef EXTRA_SECTIONS
+#define EXTRA_SECTIONS SUBTARGET_EXTRA_SECTIONS in_ctors, in_dtors
+#endif
+
+/* A list of extra section function definitions.  */
+#ifndef SUBTARGET_EXTRA_SECTION_FUNCTIONS
+#define SUBTARGET_EXTRA_SECTION_FUNCTIONS
+#endif
+
+#ifndef EXTRA_SECTION_FUNCTIONS
+#define EXTRA_SECTION_FUNCTIONS 		\
+  SUBTARGET_EXTRA_SECTION_FUNCTIONS		\
+  CTORS_SECTION_FUNCTION			\
+  DTORS_SECTION_FUNCTION			
+#endif
+
+#ifndef CTORS_SECTION_FUNCTION
+#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;						\
+    }									\
+}
+#endif
+
+#ifndef DTORS_SECTION_FUNCTION
+#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
+
+/* Support the ctors/dtors sections for g++.  */
+#ifndef INT_ASM_OP
+#define INT_ASM_OP 	".word"
+#endif
+
+/* A C statement (sans semicolon) to output an element in the table of
+   global constructors.  */
+#ifndef ASM_OUTPUT_CONSTRUCTOR
+#define ASM_OUTPUT_CONSTRUCTOR(STREAM,NAME) \
+do {						\
+  ctors_section ();				\
+  fprintf (STREAM, "\t%s\t ", INT_ASM_OP);	\
+  assemble_name (STREAM, NAME);			\
+  fprintf (STREAM, "\n");			\
+} while (0)
+#endif
+     
+/* A C statement (sans semicolon) to output an element in the table of
+   global destructors.  */
+#ifndef ASM_OUTPUT_DESTRUCTOR
+#define ASM_OUTPUT_DESTRUCTOR(STREAM,NAME) \
+do {						\
+  dtors_section ();                   		\
+  fprintf (STREAM, "\t%s\t ", INT_ASM_OP);	\
+  assemble_name (STREAM, NAME);              	\
+  fprintf (STREAM, "\n");			\
+} while (0)
+#endif
+
+#include "arm/aout.h"
+
+
+