1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
|
/* Common VxWorks target definitions for GNU compiler.
Copyright (C) 1999-2021 Free Software Foundation, Inc.
Contributed by Wind River Systems.
Rewritten by CodeSourcery, LLC.
This file is part of GCC.
GCC 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 3, or (at your option) any later
version.
GCC 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 GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
/* Assert that we are targeting VxWorks. */
#undef TARGET_VXWORKS
#define TARGET_VXWORKS 1
/* In kernel mode, VxWorks provides all the libraries itself, as well as
the functionality of startup files, etc. In RTP mode, it behaves more
like a traditional Unix, with more external files. Most of our specs
must be aware of the difference. */
/* Help locate system headers, assuming $sysroot set to $VSB_DIR on vx7 and
$WIND_BASE/target prior to that. Specs allow tailoring for RTP vs kernel,
and -idirafter allows putting system directories after GCC's own directories
for standard headers such as <stddef.h> or fixed include.
Regarding fixed includes, note the effect of sysroot_headers_suffix_spec:
For the case of VxWorks prior to 7 below, we have:
#define SYSROOT_HEADERS_SUFFIX_SPEC "%{mrtp:/usr/h;:/h}"
This results in
$build_sysroot/h ---> $prefix/include-fixed
$build_sysroot/usr/h ---> $prefix/include-fixed/mrtp for -mrtp
This is very different from what we'd get without a headers_suffix,
which would be:
$build_sysroot ---> $prefix/include-fixed/h
/usr/h
From (say) #include <assert.h>, we would find the fixed version
in the first case, not in the second. */
/* Since we provide a default -isystem, expand -isystem on the command
line early. Then restrict the amount of references we add when compiling
self-tests, as these may be run in contexts where the VxWorks environment
isn't available. */
#if TARGET_VXWORKS7
/* We arrange not rely on fixed includes for vx7 and the headers spread over
common kernel/rtp directories in addition to specific ones for each mode.
Setup sysroot_headers_suffix_spec to deal with kernel/rtp distinction. */
#undef SYSROOT_HEADERS_SUFFIX_SPEC
#define SYSROOT_HEADERS_SUFFIX_SPEC "%{mrtp:/usr/h;:/krnl/h}"
#undef VXWORKS_ADDITIONAL_CPP_SPEC
#define VXWORKS_ADDITIONAL_CPP_SPEC \
"%{!nostdinc:%{!fself-test=*: \
%{isystem*} \
-idirafter %:getenv(VSB_DIR /h) \
-idirafter %:getenv(VSB_DIR /share/h) \
-idirafter =/system \
-idirafter =/public \
}}"
#else /* TARGET_VXWORKS7 */
/* Prior to vx7, rtp and kernel headers are fairly segregated and fixincludes
is needed on each set of headers to cope with expectations of not so old
libstdc++. A perfect use case for sysroot_headers_suffix. */
#undef SYSROOT_HEADERS_SUFFIX_SPEC
#define SYSROOT_HEADERS_SUFFIX_SPEC "%{mrtp:/usr/h;:/h}"
#undef VXWORKS_ADDITIONAL_CPP_SPEC
#define VXWORKS_ADDITIONAL_CPP_SPEC \
"%{!nostdinc:%{!fself-test=*: \
%{isystem*} \
-idirafter =/wrn/coreip \
}}"
#endif
/* Our ports rely on gnu-user.h, which #defines _POSIX_SOURCE for
C++ by default. VxWorks doesn't provide 100% of what this implies
(e.g. ::mkstemp), so, arrange to prevent that by falling back to
the default CPP spec for C++ as well. */
#undef CPLUSPLUS_CPP_SPEC
/* For VxWorks static rtps, the system provides libc_internal.a, a superset of
libgcc.a that we need to use e.g. to satisfy references to __init and
__fini. We still want our libgcc to prevail for symbols it would provide
(e.g. register save entry points), so re-place it here between libraries
that might reference it and libc_internal.
In addition, some versions of VxWorks rely on explicit extra libraries for
system calls and the set of base network libraries of common use varies
across architectures. The default settings defined here might be redefined
by target specific port configuration files. */
#define VXWORKS_SYSCALL_LIBS_RTP
#if TARGET_VXWORKS7
#define VXWORKS_NET_LIBS_RTP "-l%:if-exists-then-else(%:getenv(VSB_DIR /usr/h/public/rtnetStackLib.h) rtnet net)"
#else
#define VXWORKS_NET_LIBS_RTP "-lnet -ldsi"
#endif
#define VXWORKS_BASE_LIBS_RTP "-lc -lgcc -lc_internal"
#define VXWORKS_EXTRA_LIBS_RTP
#define VXWORKS_LIBS_RTP \
VXWORKS_SYSCALL_LIBS_RTP " " VXWORKS_NET_LIBS_RTP " " \
VXWORKS_BASE_LIBS_RTP " " VXWORKS_EXTRA_LIBS_RTP
/* TLS configuration. VxWorks 7 now always has proper TLS support.
Earlier versions did not, not even for RTPS. */
#define VXWORKS_HAVE_TLS TARGET_VXWORKS7
/* On Vx6 and previous, the libraries to pick up depends on the architecture,
so cannot be defined for all archs at once. On Vx7, a VSB is always needed
and its structure is fixed and does not depend on the arch. We can thus
tell gcc where to look for when linking with RTP libraries. Use
STARTFILE_PREFIX_SPEC for this, instead of explicit -L options in LIB_SPEC,
so they survive -nodefaultlibs. */
/* On Vx7 RTP, we need to drag the __tls__ symbol to trigger initialization of
tlsLib, responsible for TLS support by the OS. */
#if TARGET_VXWORKS7
#undef STARTFILE_PREFIX_SPEC
#define STARTFILE_PREFIX_SPEC "/usr/lib/common"
#define TLS_SYM "-u __tls__"
#else
#define TLS_SYM ""
#endif
#undef VXWORKS_LIB_SPEC
#define VXWORKS_LIB_SPEC \
"%{mrtp:%{shared:-u " USER_LABEL_PREFIX "__init -u " USER_LABEL_PREFIX "__fini} \
%{!shared:%{non-static:-u " USER_LABEL_PREFIX "_STI__6__rtld -ldl} \
" TLS_SYM " \
--start-group " VXWORKS_LIBS_RTP " --end-group}}"
/* The no-op spec for "-shared" below is present because otherwise GCC
will treat it as an unrecognized option. */
#undef VXWORKS_LINK_SPEC
#define VXWORKS_LINK_SPEC \
"%{!mrtp:-r} \
%{!shared: \
%{mrtp:-q %{h*} \
%{R*} %{!T*: %(link_start) } \
%(link_os)}} \
%{v:-V} \
%{shared:-shared} \
%{Bstatic:-Bstatic} \
%{Bdynamic:-Bdynamic} \
%{!Xbind-lazy:-z now} \
%{Xbind-now:%{Xbind-lazy: \
%e-Xbind-now and -Xbind-lazy are incompatible}} \
%{mrtp:%{!shared:%{!non-static:-static} \
%{non-static:--force-dynamic --export-dynamic}}}"
#undef VXWORKS_LIBGCC_SPEC
#define VXWORKS_LIBGCC_SPEC "-lgcc"
/* Setup the crtstuff begin/end we might need for dwarf EH registration. */
#if !defined(CONFIG_SJLJ_EXCEPTIONS) && DWARF2_UNWIND_INFO
#define VX_CRTBEGIN_SPEC "vx_crtbegin.o%s"
#define VX_CRTEND_SPEC "-l:vx_crtend.o"
#else
#define VX_CRTBEGIN_SPEC ""
#define VX_CRTEND_SPEC ""
#endif
#undef VXWORKS_STARTFILE_SPEC
#define VXWORKS_STARTFILE_SPEC \
VX_CRTBEGIN_SPEC " %{mrtp:%{!shared:-l:crt0.o}}"
#undef VXWORKS_ENDFILE_SPEC
#define VXWORKS_ENDFILE_SPEC VX_CRTEND_SPEC
#undef VXWORKS_CC1_SPEC
#if TARGET_VXWORKS7
#define VXWORKS_CC1_SPEC \
"%(cc1_cpu) %{!mrtp:%{!ftls-model=*:-ftls-model=local-exec}}"
#else
#define VXWORKS_CC1_SPEC ""
#endif
/* Do VxWorks-specific parts of TARGET_OPTION_OVERRIDE. */
#undef VXWORKS_OVERRIDE_OPTIONS
#define VXWORKS_OVERRIDE_OPTIONS vxworks_override_options ()
extern void vxworks_override_options (void);
/* Whether the VxWorks variant and mode supports constructors/destructors
placed in .ctors/.dtors section or if we should generate proxy functions
for them, with special names which munch knows how to collect. On most
versions of VxWorks, only the RTP loader supports .ctors/.dtors sections,
not the kernel module loader. */
#define TARGET_VXWORKS_HAVE_CTORS_DTORS TARGET_VXWORKS_RTP
/* Support for prioritized ctors/dtors is in sync with the support for sections
on the VxWorks front, and is assumed to be provided by whatever linker level
glue is required if we were configured with --enable-initfini-array. */
#define SUPPORTS_INIT_PRIORITY \
(TARGET_VXWORKS_HAVE_CTORS_DTORS || HAVE_INITFINI_ARRAY_SUPPORT)
#if !HAVE_INITFINI_ARRAY_SUPPORT
/* VxWorks requires special handling of constructors and destructors.
All VxWorks configurations must use these functions. */
#undef TARGET_ASM_CONSTRUCTOR
#define TARGET_ASM_CONSTRUCTOR vxworks_asm_out_constructor
#undef TARGET_ASM_DESTRUCTOR
#define TARGET_ASM_DESTRUCTOR vxworks_asm_out_destructor
extern void vxworks_asm_out_constructor (rtx symbol, int priority);
extern void vxworks_asm_out_destructor (rtx symbol, int priority);
#endif
/* Override the vxworks-dummy.h definitions. TARGET_VXWORKS_RTP
is defined by vxworks.opt. */
#undef VXWORKS_GOTT_BASE
#define VXWORKS_GOTT_BASE "__GOTT_BASE__"
#undef VXWORKS_GOTT_INDEX
#define VXWORKS_GOTT_INDEX "__GOTT_INDEX__"
#undef PTRDIFF_TYPE
#define PTRDIFF_TYPE (TARGET_VXWORKS64 ? "long int" : "int")
#undef SIZE_TYPE
#define SIZE_TYPE (TARGET_VXWORKS64 ? "long unsigned int" : "unsigned int")
/* Assumptions on the target libc. VxWorks 7, post SR600, provides a C11
runtime without sincos support. */
#undef TARGET_LIBC_HAS_FUNCTION
#define TARGET_LIBC_HAS_FUNCTION \
(TARGET_VXWORKS7 ? default_libc_has_function : no_c99_libc_has_function)
/* Both kernels and RTPs have the facilities required by this macro. */
#define TARGET_POSIX_IO
/* A VxWorks implementation of TARGET_OS_CPP_BUILTINS. */
/* The VxWorks personality we rely on, controlling which sections of system
headers files we trigger. This might be redefined on targets where the
base VxWorks environment doesn't come with a GNU toolchain. */
#define VXWORKS_PERSONALITY "gnu"
#define VXWORKS_OS_CPP_BUILTINS() \
do \
{ \
builtin_define ("__vxworks"); \
builtin_define ("__VXWORKS__"); \
builtin_assert ("system=unix"); \
if (TARGET_VXWORKS_RTP) \
builtin_define ("__RTP__"); \
else \
builtin_define ("_WRS_KERNEL"); \
builtin_define ("TOOL_FAMILY=" VXWORKS_PERSONALITY); \
builtin_define ("TOOL=" VXWORKS_PERSONALITY); \
if (TARGET_VXWORKS7) \
{ \
builtin_define ("_VSB_CONFIG_FILE=<config/vsbConfig.h>"); \
\
/* _ALLOW_KEYWORD_MACROS is needed on VxWorks 7 to \
prevent compilation failures triggered by our \
definition of "inline" in ansidecl when "inline" \
is not a keyword. */ \
if (!flag_isoc99 && !c_dialect_cxx()) \
builtin_define ("_ALLOW_KEYWORD_MACROS"); \
} \
/* C++ support relies on C99 features from C++11, even C++98 \
for listdc++ in particular, with corresponding checks at \
configure time. Make sure C99 features are exposed by the \
system headers. */ \
if (c_dialect_cxx()) \
builtin_define("_C99"); \
} \
while (0)
/* For specific CPU macro definitions expected by the system headers,
different versions of VxWorks expect different forms of macros,
such as "_VX_CPU=..." on Vx7 and some variants of Vx6, or "CPU=..."
on all Vx6 and earlier. Setup a common prefix macro here, that
arch specific ports can reuse. */
#if TARGET_VXWORKS7
#define VX_CPU_PREFIX "_VX_"
#else
#define VX_CPU_PREFIX ""
#endif
#define VXWORKS_KIND VXWORKS_KIND_NORMAL
/* The diab linker does not handle .gnu_attribute sections. */
#undef HAVE_AS_GNU_ATTRIBUTE
/* We call vxworks's cacheTextUpdate instead of CLEAR_INSN_CACHE if
needed. We don't want to force a call on targets that don't define
cache-clearing insns nor CLEAR_INSN_CACHE. */
#undef TARGET_EMIT_CALL_BUILTIN___CLEAR_CACHE
#define TARGET_EMIT_CALL_BUILTIN___CLEAR_CACHE \
vxworks_emit_call_builtin___clear_cache
extern void vxworks_emit_call_builtin___clear_cache (rtx begin, rtx end);
/* Default dwarf control values, for non-gdb debuggers that come with
VxWorks. */
#undef VXWORKS_DWARF_VERSION_DEFAULT
#define VXWORKS_DWARF_VERSION_DEFAULT (TARGET_VXWORKS7 ? 4 : 2)
#undef DWARF_GNAT_ENCODINGS_DEFAULT
#define DWARF_GNAT_ENCODINGS_DEFAULT \
(TARGET_VXWORKS7 ? DWARF_GNAT_ENCODINGS_MINIMAL : DWARF_GNAT_ENCODINGS_ALL)
/* The default configuration of incremental LTO linking (-flinker-output=rel)
warns if an object file included in the link does not contain LTO bytecode,
because in this case the output will not contain it either, thus preventing
further incremental LTO linking. We do not do repeated incremental linking
so silence the warning (instead of passing -flinker-output=nolto-rel). */
#undef LTO_PLUGIN_SPEC
#define LTO_PLUGIN_SPEC "%{!mrtp:-plugin-opt=-linker-output-auto-nolto-rel}"
|