1/* Definitions for SH running Linux-based GNU systems using ELF
2   Copyright (C) 1999-2022 Free Software Foundation, Inc.
3   Contributed by Kazumoto Kojima <kkojima@rr.iij4u.or.jp>
4
5This file is part of GCC.
6
7GCC 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 3, or (at your option)
10any later version.
11
12GCC 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 GCC; see the file COPYING3.  If not see
19<http://www.gnu.org/licenses/>.  */
20
21/* Run-time Target Specification.  */
22
23/* Enable DWARF 2 exceptions.  */
24#undef DWARF2_UNWIND_INFO
25#define DWARF2_UNWIND_INFO 1
26
27#undef SUBTARGET_CPP_SPEC
28#define SUBTARGET_CPP_SPEC "\
29   %{posix:-D_POSIX_SOURCE} \
30   %{pthread:-D_REENTRANT -D_PTHREADS} \
31"
32
33#define TARGET_OS_CPP_BUILTINS() \
34  do						\
35    {						\
36      GNU_USER_TARGET_OS_CPP_BUILTINS();	\
37    }						\
38  while (0)
39
40#undef TARGET_DEFAULT
41#define TARGET_DEFAULT \
42  (TARGET_CPU_DEFAULT | TARGET_ENDIAN_DEFAULT | TARGET_OPT_DEFAULT)
43
44#define TARGET_ASM_FILE_END file_end_indicate_exec_stack
45
46#if TARGET_ENDIAN_DEFAULT == MASK_LITTLE_ENDIAN
47#define MUSL_DYNAMIC_LINKER_E "%{mb:eb}"
48#else
49#define MUSL_DYNAMIC_LINKER_E "%{!ml:eb}"
50#endif
51
52#if TARGET_CPU_DEFAULT & (MASK_HARD_SH2A_DOUBLE | MASK_SH4)
53/* "-nofpu" if any nofpu option is specified.  */
54#define MUSL_DYNAMIC_LINKER_FP \
55  "%{m1|m2|m2a-nofpu|m3|m4-nofpu|m4-100-nofpu|m4-200-nofpu|m4-300-nofpu|" \
56  "m4-340|m4-400|m4-500|m4al:-nofpu}"
57#else
58/* "-nofpu" if none of the hard fpu options are specified.  */
59#define MUSL_DYNAMIC_LINKER_FP "%{m2a|m4|m4-100|m4-200|m4-300|m4a:;:-nofpu}"
60#endif
61
62#undef MUSL_DYNAMIC_LINKER
63#define MUSL_DYNAMIC_LINKER \
64  "/lib/ld-musl-sh" MUSL_DYNAMIC_LINKER_E MUSL_DYNAMIC_LINKER_FP \
65  "%{mfdpic:-fdpic}.so.1"
66
67#define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
68
69#undef SUBTARGET_LINK_EMUL_SUFFIX
70#define SUBTARGET_LINK_EMUL_SUFFIX "%{mfdpic:_fd;:_linux}"
71
72#undef SUBTARGET_LINK_SPEC
73#define SUBTARGET_LINK_SPEC \
74  "%{shared:-shared} \
75   %{!static: \
76     %{rdynamic:-export-dynamic} \
77     -dynamic-linker " GNU_USER_DYNAMIC_LINKER "} \
78   %{static:-static}"
79
80/* Output assembler code to STREAM to call the profiler.  */
81#undef FUNCTION_PROFILER
82#define FUNCTION_PROFILER(STREAM,LABELNO)				\
83  do {									\
84	if (flag_pic)							\
85	  {								\
86	    fprintf (STREAM, "\tmov.l\t3f,r1\n");			\
87	    fprintf (STREAM, "\tmova\t3f,r0\n");			\
88	    fprintf (STREAM, "\tadd\tr1,r0\n");				\
89	    fprintf (STREAM, "\tmov.l\t1f,r1\n");			\
90	    fprintf (STREAM, "\tmov.l\t@(r0,r1),r1\n");			\
91	  }								\
92	else								\
93	  fprintf (STREAM, "\tmov.l\t1f,r1\n");				\
94	fprintf (STREAM, "\tsts.l\tpr,@-r15\n");			\
95	fprintf (STREAM, "\tmova\t2f,r0\n");				\
96	fprintf (STREAM, "\tjmp\t@r1\n");				\
97	fprintf (STREAM, "\tlds\tr0,pr\n");				\
98	fprintf (STREAM, "\t.align\t2\n");				\
99	if (flag_pic)							\
100	  {								\
101	    fprintf (STREAM, "1:\t.long\tmcount@GOT\n");		\
102	    fprintf (STREAM, "3:\t.long\t_GLOBAL_OFFSET_TABLE_\n");	\
103	  }								\
104	else								\
105	  fprintf (STREAM, "1:\t.long\tmcount\n");			\
106	fprintf (STREAM, "2:\tlds.l\t@r15+,pr\n");			\
107  } while (0)
108
109/* For SH3 and SH4, we use a slot of the unwind frame which correspond
110   to a fake register number 16 as a placeholder for the return address
111   in MD_FALLBACK_FRAME_STATE_FOR and its content will be read with
112   _Unwind_GetGR which uses dwarf_reg_size_table to get the size of
113   the register.  So the entry of dwarf_reg_size_table corresponding to
114   this slot must be set.  To do this, we redefine DBX_REGISTER_NUMBER
115   so as to return itself for 16.  */
116#undef DBX_REGISTER_NUMBER
117#define DBX_REGISTER_NUMBER(REGNO) \
118  (((REGNO) == 16) ? 16 : SH_DBX_REGISTER_NUMBER (REGNO))
119
120/* Install the __sync libcalls.  */
121#undef TARGET_INIT_LIBFUNCS
122#define TARGET_INIT_LIBFUNCS  sh_init_sync_libfuncs
123
124#undef SUBTARGET_OVERRIDE_OPTIONS
125#define SUBTARGET_OVERRIDE_OPTIONS					\
126  do									\
127    {									\
128      /* Set default atomic model if it hasn't been specified.  */	\
129      if (OPTION_SET_P (sh_atomic_model_str) == 0)		\
130	{								\
131	  if (TARGET_SH3)						\
132	    sh_atomic_model_str = "soft-gusa";				\
133	  else if (TARGET_SH1)						\
134	    sh_atomic_model_str = "soft-imask";				\
135	}								\
136      /* Set -musermode if it hasn't been specified.  */		\
137      if (OPTION_SET_P (TARGET_USERMODE) == 0)			\
138	TARGET_USERMODE = true;						\
139    }									\
140  while (0)
141