1/* Definitions for non-Linux based ARM systems using ELF
2   Copyright (C) 1998-2020 Free Software Foundation, Inc.
3   Contributed by Catherine Moore <clm@cygnus.com>
4
5   This file is part of GCC.
6
7   GCC is free software; you can redistribute it and/or modify it
8   under the terms of the GNU General Public License as published
9   by the Free Software Foundation; either version 3, or (at your
10   option) any later version.
11
12   GCC is distributed in the hope that it will be useful, but WITHOUT
13   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
15   License for more details.
16
17   You should have received a copy of the GNU General Public License
18   along with GCC; see the file COPYING3.  If not see
19   <http://www.gnu.org/licenses/>.  */
20
21/* elfos.h should have already been included.  Now just override
22   any conflicting definitions and add any extras.  */
23
24/* Run-time Target Specification.  */
25
26/* Default to using software floating point.  */
27#ifndef TARGET_DEFAULT
28#define TARGET_DEFAULT	(0)
29#endif
30
31/* Now we define the strings used to build the spec file.  */
32#define UNKNOWN_ELF_STARTFILE_SPEC	" crti%O%s crtbegin%O%s crt0%O%s"
33
34#undef  STARTFILE_SPEC
35#define STARTFILE_SPEC	\
36  "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s} "	\
37  UNKNOWN_ELF_STARTFILE_SPEC
38
39#define UNKNOWN_ELF_ENDFILE_SPEC	"crtend%O%s crtn%O%s"
40
41#undef  ENDFILE_SPEC
42#define ENDFILE_SPEC	UNKNOWN_ELF_ENDFILE_SPEC
43
44/* The __USES_INITFINI__ define is tested in newlib/libc/sys/arm/crt0.S
45   to see if it needs to invoked _init() and _fini().  */
46#undef  SUBTARGET_CPP_SPEC
47#define SUBTARGET_CPP_SPEC  "-D__USES_INITFINI__"
48
49#undef  PREFERRED_DEBUGGING_TYPE
50#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
51
52/* Return a nonzero value if DECL has a section attribute.  */
53#define IN_NAMED_SECTION_P(DECL)					\
54  ((TREE_CODE (DECL) == FUNCTION_DECL || TREE_CODE (DECL) == VAR_DECL)	\
55   && DECL_SECTION_NAME (DECL) != NULL)
56
57#undef  ASM_OUTPUT_ALIGNED_BSS
58#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN)   	\
59  do									\
60    {									\
61      if (IN_NAMED_SECTION_P (DECL))					\
62	switch_to_section (get_named_section (DECL, NULL, 0));		\
63      else								\
64	switch_to_section (bss_section);				\
65      									\
66      ASM_OUTPUT_ALIGN (FILE, floor_log2 (ALIGN / BITS_PER_UNIT));	\
67									\
68      last_assemble_variable_decl = DECL;				\
69      ASM_DECLARE_OBJECT_NAME (FILE, NAME, DECL);			\
70      ASM_OUTPUT_SKIP (FILE, SIZE ? (int)(SIZE) : 1);			\
71    } 									\
72  while (0)
73
74#undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
75#define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)	\
76  do									\
77    {									\
78      if ((DECL) != NULL && IN_NAMED_SECTION_P (DECL))			\
79	switch_to_section (get_named_section (DECL, NULL, 0));		\
80      else								\
81	switch_to_section (bss_section);				\
82									\
83      ASM_OUTPUT_ALIGN (FILE, floor_log2 (ALIGN / BITS_PER_UNIT));	\
84      ASM_OUTPUT_LABEL (FILE, NAME);					\
85      fprintf (FILE, "\t.space\t%d\n", SIZE ? (int) SIZE : 1);		\
86      fprintf (FILE, "\t.size\t%s, %d\n",				\
87	       NAME, SIZE ? (int) SIZE : 1);				\
88    }									\
89  while (0)
90
91/* The libgcc udivmod functions may throw exceptions.  If newlib is
92   configured to support long longs in I/O, then printf will depend on
93   udivmoddi4, which will depend on the exception unwind routines,
94   which will depend on abort, which is defined in libc.  */
95#undef LINK_GCC_C_SEQUENCE_SPEC
96#define LINK_GCC_C_SEQUENCE_SPEC "--start-group %G %{!nolibc:%L} --end-group"
97