1/* Definitions for non-Linux based ARM systems using ELF
2   Copyright (C) 1998 Free Software Foundation, Inc.
3   Contributed by Catherine Moore <clm@cygnus.com>
4
5This file is part of GNU CC.
6
7GNU CC is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2, or (at your option)
10any later version.
11
12GNU CC is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with this program; see the file COPYING.  If not, write to
19the Free Software Foundation, 59 Temple Place - Suite 330,
20Boston, MA 02111-1307, USA.  */
21
22/* Run-time Target Specification.  */
23#ifndef TARGET_VERSION
24#define TARGET_VERSION	fputs (" (ARM/ELF non-Linux)", stderr);
25#endif
26
27/* If you don't define HAVE_ATEXIT, and the object file format/OS/whatever
28   does not support constructors/destructors, then gcc implements destructors
29   by defining its own exit function, which calls the destructors.  This gcc
30   exit function overrides the C library's exit function, and this can cause
31   all kinds of havoc if the C library has a non-trivial exit function.  You
32   really don't want to use the exit function in libgcc2.c.  */
33#define HAVE_ATEXIT
34
35/* Default to using APCS-32 and software floating point.  */
36#ifndef TARGET_DEFAULT
37#define TARGET_DEFAULT	(ARM_FLAG_SOFT_FLOAT | ARM_FLAG_APCS_32)
38#endif
39
40/* Now we define the strings used to build the spec file.  */
41#define STARTFILE_SPEC	"crtbegin%O%s crt0%O%s"
42
43#define ENDFILE_SPEC	"crtend%O%s"
44
45#define USER_LABEL_PREFIX 	""
46#define LOCAL_LABEL_PREFIX 	"."
47
48#define TEXT_SECTION "		.text"
49
50#define INVOKE__main
51
52/* Debugging */
53#define DWARF_DEBUGGING_INFO
54#define DWARF2_DEBUGGING_INFO
55#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
56
57/* Support for Constructors and Destrcutors .  */
58#define READONLY_DATA_SECTION	rdata_section
59
60/* A list of other sections which the compiler might be "in" at any
61   given time.  */
62#define SUBTARGET_EXTRA_SECTIONS in_rdata,
63
64/* A list of extra section function definitions.  */
65#define SUBTARGET_EXTRA_SECTION_FUNCTIONS	RDATA_SECTION_FUNCTION
66
67#define RDATA_SECTION_ASM_OP	"\t.section .rodata"
68
69#define RDATA_SECTION_FUNCTION 					\
70void								\
71rdata_section ()						\
72{								\
73  if (in_section != in_rdata)					\
74    {								\
75      fprintf (asm_out_file, "%s\n", RDATA_SECTION_ASM_OP);	\
76      in_section = in_rdata;					\
77    }								\
78}
79
80#define CTOR_LIST_BEGIN					\
81asm (CTORS_SECTION_ASM_OP);				\
82func_ptr __CTOR_LIST__[1] = { (func_ptr) (-1) }
83
84#define CTOR_LIST_END					\
85asm (CTORS_SECTION_ASM_OP);				\
86func_ptr __CTOR_END__[1] = { (func_ptr) 0 };
87
88#define DTOR_LIST_BEGIN					\
89asm (DTORS_SECTION_ASM_OP);				\
90func_ptr __DTOR_LIST__[1] = { (func_ptr) (-1) }
91
92#define DTOR_LIST_END					\
93asm (DTORS_SECTION_ASM_OP);				\
94func_ptr __DTOR_END__[1] = { (func_ptr) 0 };
95
96/* A C statement to output something to the assembler file to switch to section
97   NAME for object DECL which is either a FUNCTION_DECL, a VAR_DECL or
98   NULL_TREE.  Some target formats do not support arbitrary sections.  Do not
99   define this macro in such cases.  */
100#define ASM_OUTPUT_SECTION_NAME(STREAM, DECL, NAME, RELOC) \
101do {								\
102  if ((DECL) && TREE_CODE (DECL) == FUNCTION_DECL)		\
103    fprintf (STREAM, "\t.section %s,\"ax\",@progbits\n", (NAME)); \
104  else if ((DECL) && DECL_READONLY_SECTION (DECL, RELOC))	\
105    fprintf (STREAM, "\t.section %s,\"a\"\n", (NAME));		\
106  else								\
107    fprintf (STREAM, "\t.section %s,\"aw\"\n", (NAME));		\
108} while (0)
109
110/* Don't know how to order these.  UNALIGNED_WORD_ASM_OP is in
111   dwarf2.out. */
112#define UNALIGNED_WORD_ASM_OP ".4byte"
113
114#define ASM_OUTPUT_DWARF2_ADDR_CONST(FILE,ADDR)                  \
115     fprintf ((FILE), "\t%s\t%s", UNALIGNED_WORD_ASM_OP, ADDR)
116
117#define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,RTX)                   \
118do {								\
119  fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP);		\
120  output_addr_const ((FILE), (RTX));				\
121  fputc ('\n', (FILE));						\
122} while (0)
123
124
125/* The ARM development system defines __main.  */
126#define NAME__MAIN "__gccmain"
127#define SYMBOL__MAIN __gccmain
128
129#define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
130#define UNIQUE_SECTION_P(DECL) (DECL_ONE_ONLY (DECL))
131#define UNIQUE_SECTION(DECL,RELOC)				\
132do {								\
133  int len;							\
134  char * name, * string, * prefix;				\
135								\
136  name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL));	\
137								\
138  if (! DECL_ONE_ONLY (DECL))					\
139    {								\
140      prefix = ".";                                             \
141      if (TREE_CODE (DECL) == FUNCTION_DECL)			\
142	prefix = ".text.";					\
143      else if (DECL_READONLY_SECTION (DECL, RELOC))		\
144	prefix = ".rodata.";					\
145      else							\
146	prefix = ".data.";					\
147    }								\
148  else if (TREE_CODE (DECL) == FUNCTION_DECL)			\
149    prefix = ".gnu.linkonce.t.";				\
150  else if (DECL_READONLY_SECTION (DECL, RELOC))			\
151    prefix = ".gnu.linkonce.r.";				\
152  else								\
153    prefix = ".gnu.linkonce.d.";				\
154								\
155  len = strlen (name) + strlen (prefix);			\
156  string = alloca (len + 1);					\
157  sprintf (string, "%s%s", prefix, name);			\
158								\
159  DECL_SECTION_NAME (DECL) = build_string (len, string);	\
160} while (0)
161
162#ifndef CPP_APCS_PC_DEFAULT_SPEC
163#define CPP_APCS_PC_DEFAULT_SPEC	"-D__APCS_32__"
164#endif
165
166#ifndef SUBTARGET_CPU_DEFAULT
167#define SUBTARGET_CPU_DEFAULT 		TARGET_CPU_arm7tdmi
168#endif
169
170/* Now get the routine arm-elf definitions.  */
171#include "arm/elf.h"
172