1 /* Definitions for 64-bit SPARC running Linux-based GNU systems with ELF.
2 Copyright (C) 1996-2023 Free Software Foundation, Inc.
3 Contributed by David S. Miller (davem@caip.rutgers.edu)
4
5 This file is part of GCC.
6
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
10 any later version.
11
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public 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 #define TARGET_OS_CPP_BUILTINS() \
22 do \
23 { \
24 GNU_USER_TARGET_OS_CPP_BUILTINS(); \
25 if (TARGET_ARCH64) \
26 builtin_define ("_LONGLONG"); \
27 if (TARGET_ARCH32 \
28 && TARGET_LONG_DOUBLE_128) \
29 builtin_define ("__LONG_DOUBLE_128__"); \
30 } \
31 while (0)
32
33 /* On Linux, the combination sparc64-* --with-cpu=v8 is supported and
34 selects a 32-bit compiler. */
35 #if defined(TARGET_64BIT_DEFAULT) && TARGET_CPU_DEFAULT >= TARGET_CPU_v9
36 #undef TARGET_DEFAULT
37 #define TARGET_DEFAULT \
38 (MASK_V9 + MASK_64BIT + MASK_PTR64 + MASK_STACK_BIAS + \
39 MASK_V8PLUS + MASK_APP_REGS + MASK_FPU + MASK_LONG_DOUBLE_128)
40 #endif
41
42 /* This must be v9a not just v9 because by default we enable
43 -mvis. */
44 #undef ASM_CPU64_DEFAULT_SPEC
45 #define ASM_CPU64_DEFAULT_SPEC "-Av9a"
46
47 #undef ENDFILE_SPEC
48 #define ENDFILE_SPEC \
49 GNU_USER_TARGET_ENDFILE_SPEC \
50 "%{Ofast|ffast-math|funsafe-math-optimizations:%{!shared:crtfastmath.o%s}}"
51
52 /* The default code model. */
53 #undef SPARC_DEFAULT_CMODEL
54 #define SPARC_DEFAULT_CMODEL CM_MEDLOW
55
56 #undef WCHAR_TYPE
57 #define WCHAR_TYPE "int"
58
59 #undef WCHAR_TYPE_SIZE
60 #define WCHAR_TYPE_SIZE 32
61
62 /* Define for support of TFmode long double.
63 SPARC ABI says that long double is 4 words. */
64 #undef LONG_DOUBLE_TYPE_SIZE
65 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
66
67 #undef CPP_SUBTARGET_SPEC
68 #define CPP_SUBTARGET_SPEC "\
69 %{posix:-D_POSIX_SOURCE} \
70 %{pthread:-D_REENTRANT} \
71 "
72
73 /* Provide a LINK_SPEC appropriate for GNU/Linux. Here we provide support
74 for the special GCC options -static and -shared, which allow us to
75 link things in one of these three modes by applying the appropriate
76 combinations of options at link-time.
77
78 When the -shared link option is used a final link is not being
79 done. */
80
81 #define GLIBC_DYNAMIC_LINKER32 "/lib/ld-linux.so.2"
82 #define GLIBC_DYNAMIC_LINKER64 "/lib64/ld-linux.so.2"
83
84 #ifdef SPARC_BI_ARCH
85
86 #undef SUBTARGET_EXTRA_SPECS
87 #define SUBTARGET_EXTRA_SPECS \
88 { "link_arch32", LINK_ARCH32_SPEC }, \
89 { "link_arch64", LINK_ARCH64_SPEC }, \
90 { "link_arch_default", LINK_ARCH_DEFAULT_SPEC }, \
91 { "link_arch", LINK_ARCH_SPEC },
92
93 #define LINK_ARCH32_SPEC "-m elf32_sparc %{shared:-shared} \
94 %{!shared: \
95 %{!static: \
96 %{rdynamic:-export-dynamic} \
97 -dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "} \
98 %{static:-static}} \
99 "
100
101 #define LINK_ARCH64_SPEC "-m elf64_sparc %{shared:-shared} \
102 %{!shared: \
103 %{!static: \
104 %{rdynamic:-export-dynamic} \
105 -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "} \
106 %{static:-static}} \
107 "
108
109 #define LINK_ARCH_SPEC "\
110 %{m32:%(link_arch32)} \
111 %{m64:%(link_arch64)} \
112 %{!m32:%{!m64:%(link_arch_default)}} \
113 "
114
115 #define LINK_ARCH_DEFAULT_SPEC \
116 (DEFAULT_ARCH32_P ? LINK_ARCH32_SPEC : LINK_ARCH64_SPEC)
117
118 #undef LINK_SPEC
119 #define LINK_SPEC "\
120 %(link_arch) \
121 %{!mno-relax:%{!r:-relax}} \
122 "
123
124 /* -mcpu=native handling only makes sense with compiler running on
125 a SPARC chip. */
126 #if defined(__sparc__) && defined(__linux__)
127 extern const char *host_detect_local_cpu (int argc, const char **argv);
128 # define EXTRA_SPEC_FUNCTIONS \
129 { "local_cpu_detect", host_detect_local_cpu },
130
131 # define MCPU_MTUNE_NATIVE_SPECS \
132 " %{mcpu=native:%<mcpu=native %:local_cpu_detect(cpu)}" \
133 " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
134 #else
135 # define MCPU_MTUNE_NATIVE_SPECS ""
136 #endif
137
138 #define DRIVER_SELF_SPECS MCPU_MTUNE_NATIVE_SPECS
139
140 /* -fsanitize=address is currently only supported for 32-bit. */
141 #define ASAN_REJECT_SPEC \
142 "%{!%:sanitize(thread):%e-fsanitize=address is not supported in this configuration}"
143
144 #undef ASAN_CC1_SPEC
145 #if DEFAULT_ARCH32_P
146 #define ASAN_CC1_SPEC \
147 "%{%:sanitize(address):-funwind-tables %{m64:" ASAN_REJECT_SPEC "}}"
148 #else
149 #define ASAN_CC1_SPEC \
150 "%{%:sanitize(address):-funwind-tables %{!m32:" ASAN_REJECT_SPEC "}}"
151 #endif
152
153 #undef CC1_SPEC
154 #if DEFAULT_ARCH32_P
155 #define CC1_SPEC GNU_USER_TARGET_CC1_SPEC ASAN_CC1_SPEC \
156 "%{m32:%{m64:%emay not use both -m32 and -m64}} \
157 %{m64:-mptr64 -mstack-bias -mlong-double-128 \
158 %{!mcpu*:-mcpu=ultrasparc} \
159 %{!mno-vis:%{!mcpu=v9:-mvis}}}"
160 #else
161 #define CC1_SPEC GNU_USER_TARGET_CC1_SPEC ASAN_CC1_SPEC \
162 "%{m32:%{m64:%emay not use both -m32 and -m64}} \
163 %{m32:-mptr32 -mno-stack-bias %{!mlong-double-128:-mlong-double-64} \
164 %{!mcpu*:-mcpu=cypress}} \
165 %{mv8plus:-mptr32 -mno-stack-bias %{!mlong-double-128:-mlong-double-64} \
166 %{!mcpu*:-mcpu=v9}} \
167 %{!m32:%{!mcpu*:-mcpu=ultrasparc}} \
168 %{!mno-vis:%{!m32:%{!mcpu=v9:-mvis}}}"
169 #endif
170
171 /* Support for a compile-time default CPU, et cetera. The rules are:
172 --with-cpu is ignored if -mcpu is specified; likewise --with-cpu-32
173 and --with-cpu-64.
174 --with-tune is ignored if -mtune is specified; likewise --with-tune-32
175 and --with-tune-64.
176 --with-float is ignored if -mhard-float, -msoft-float, -mfpu, or -mno-fpu
177 are specified.
178 In the SPARC_BI_ARCH compiler we cannot pass %{!mcpu=*:-mcpu=%(VALUE)}
179 here, otherwise say -mcpu=v7 would be passed even when -m64.
180 CC1_SPEC above takes care of this instead.
181
182 Note that the order of the cpu* and tune* options matters: the
183 config.gcc file always sets with_cpu to some value, even if the
184 user didn't use --with-cpu when invoking the configure script.
185 This value is based on the target name. Therefore we have to make
186 sure that --with-cpu-32 takes precedence to --with-cpu in < v9
187 systems, and that --with-cpu-64 takes precedence to --with-cpu in
188 >= v9 systems. As for the tune* options, in some platforms
189 config.gcc also sets a default value for it if the user didn't use
190 --with-tune when invoking the configure script. */
191 #undef OPTION_DEFAULT_SPECS
192 #if DEFAULT_ARCH32_P
193 #define OPTION_DEFAULT_SPECS \
194 {"cpu_32", "%{!m64:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
195 {"cpu_64", "%{m64:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
196 {"cpu", "%{!m64:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
197 {"tune_32", "%{!m64:%{!mtune=*:-mtune=%(VALUE)}}" }, \
198 {"tune_64", "%{m64:%{!mtune=*:-mtune=%(VALUE)}}" }, \
199 {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
200 {"float", "%{!msoft-float:%{!mhard-float:%{!mfpu:%{!mno-fpu:-m%(VALUE)-float}}}}" }
201 #else
202 #define OPTION_DEFAULT_SPECS \
203 {"cpu_32", "%{m32:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
204 {"cpu_64", "%{!m32:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
205 {"cpu", "%{!m32:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
206 {"tune_32", "%{m32:%{!mtune=*:-mtune=%(VALUE)}}" }, \
207 {"tune_64", "%{!m32:%{!mtune=*:-mtune=%(VALUE)}}" }, \
208 {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
209 {"float", "%{!msoft-float:%{!mhard-float:%{!mfpu:%{!mno-fpu:-m%(VALUE)-float}}}}" }
210 #endif
211
212 #if DEFAULT_ARCH32_P
213 #define MULTILIB_DEFAULTS { "m32" }
214 #else
215 #define MULTILIB_DEFAULTS { "m64" }
216 #endif
217
218 #else /* !SPARC_BI_ARCH */
219
220 #undef LINK_SPEC
221 #define LINK_SPEC "-m elf64_sparc -Y P,%R/usr/lib64 %{shared:-shared} \
222 %{!shared: \
223 %{!static: \
224 %{rdynamic:-export-dynamic} \
225 -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "} \
226 %{static:-static}} \
227 %{!mno-relax:%{!r:-relax}} \
228 "
229
230 #endif /* !SPARC_BI_ARCH */
231
232 /* It's safe to pass -s always, even if -g is not used. */
233 #undef ASM_SPEC
234 #define ASM_SPEC "\
235 -s \
236 %{" FPIE_OR_FPIC_SPEC ":-K PIC} \
237 %{!.c:%{findirect-dispatch:-K PIC}} \
238 %(asm_cpu) %(asm_arch) %(asm_relax)"
239
240 #undef ASM_OUTPUT_ALIGNED_LOCAL
241 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
242 do { \
243 fputs ("\t.local\t", (FILE)); \
244 assemble_name ((FILE), (NAME)); \
245 putc ('\n', (FILE)); \
246 ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN); \
247 } while (0)
248
249 #undef COMMON_ASM_OP
250 #define COMMON_ASM_OP "\t.common\t"
251
252 #undef LOCAL_LABEL_PREFIX
253 #define LOCAL_LABEL_PREFIX "."
254
255 /* DWARF bits. */
256
257 /* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets.
258 Obviously the Dwarf2 folks haven't tried to actually build systems
259 with their spec. On a 64-bit system, only 64-bit relocs become
260 RELATIVE relocations. */
261
262 /* #define DWARF_OFFSET_SIZE PTR_SIZE */
263
264 #undef DITF_CONVERSION_LIBFUNCS
265 #define DITF_CONVERSION_LIBFUNCS 1
266
267 #ifdef HAVE_AS_TLS
268 #undef TARGET_SUN_TLS
269 #undef TARGET_GNU_TLS
270 #define TARGET_SUN_TLS 0
271 #define TARGET_GNU_TLS 1
272 #endif
273
274 /* We use GNU ld so undefine this so that attribute((init_priority)) works. */
275 #undef CTORS_SECTION_ASM_OP
276 #undef DTORS_SECTION_ASM_OP
277
278 /* Static stack checking is supported by means of probes. */
279 #define STACK_CHECK_STATIC_BUILTIN 1
280
281 #undef NEED_INDICATE_EXEC_STACK
282 #define NEED_INDICATE_EXEC_STACK 1
283
284 #ifdef TARGET_LIBC_PROVIDES_SSP
285 /* sparc glibc provides __stack_chk_guard in [%g7 + 0x14],
286 sparc64 glibc provides it at [%g7 + 0x28]. */
287 #define TARGET_THREAD_SSP_OFFSET (TARGET_ARCH64 ? 0x28 : 0x14)
288 #endif
289
290 /* Define if long doubles should be mangled as 'g'. */
291 #define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING
292
293 /* We use glibc _mcount for profiling. */
294 #undef NO_PROFILE_COUNTERS
295 #define NO_PROFILE_COUNTERS 1