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[gcc.git] / gcc / config / rs6000 / rtems.h
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956d6950 1/* Definitions for rtems targeting a PowerPC using elf.
8d9254fc 2 Copyright (C) 1996-2020 Free Software Foundation, Inc.
ae407704
DE		 3 Contributed by Joel Sherrill (joel@OARcorp.com).
4
5de601cf 5 This file is part of GCC.
ae407704 6
5de601cf
NC		 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
2f83c7d6 9 by the Free Software Foundation; either version 3, or (at your
5de601cf 10 option) any later version.
ae407704 11
5de601cf
NC		 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.
ae407704 16
99f08974
SH		 17 Under Section 7 of GPL version 3, you are granted additional
18 permissions described in the GCC Runtime Library Exception, version
19 3.1, as published by the Free Software Foundation.
20
21 You should have received a copy of the GNU General Public License and
22 a copy of the GCC Runtime Library Exception along with this program;
23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
2f83c7d6 24 <http://www.gnu.org/licenses/>. */
ae407704 25
16bab95a
SH		 26/* Copy and paste from linux64.h and freebsd64.h */
27#ifdef IN_LIBGCC2
28#undef TARGET_64BIT
29#ifdef __powerpc64__
30#define TARGET_64BIT 1
31#else
32#define TARGET_64BIT 0
33#endif
34#endif
35
36/* Copy and paste from linux64.h and freebsd64.h */
37#undef TARGET_AIX
38#define TARGET_AIX TARGET_64BIT
ae407704 39
17691698
SH		 40/* Simplified copy and paste from linux64.h and freebsd64.h */
41#undef DOT_SYMBOLS
42#define DOT_SYMBOLS 0
43
44/* Copy and paste from linux64.h and freebsd64.h */
45#undef TARGET_CMODEL
46#define TARGET_CMODEL rs6000_current_cmodel
47#define SET_CMODEL(opt) rs6000_current_cmodel = opt
48
7990b46f 49#undef TARGET_OS_CPP_BUILTINS
16bab95a
SH		 50#define TARGET_OS_CPP_BUILTINS() \
51 do \
52 { \
53 builtin_define ("__rtems__"); \
54 builtin_define ("__USE_INIT_FINI__"); \
55 builtin_assert ("system=rtems"); \
56 if (TARGET_64BIT) \
57 { \
58 builtin_define ("__PPC__"); \
59 builtin_define ("__PPC64__"); \
60 builtin_define ("__powerpc64__"); \
61 builtin_assert ("cpu=powerpc64"); \
62 builtin_assert ("machine=powerpc64"); \
63 } \
64 else \
65 { \
66 builtin_define_std ("PPC"); \
67 builtin_define_std ("powerpc"); \
68 builtin_assert ("cpu=powerpc"); \
69 builtin_assert ("machine=powerpc"); \
70 TARGET_OS_SYSV_CPP_BUILTINS (); \
71 } \
72 } \
73 while (0)
74
17691698
SH		 75/* Copy and paste from linux64.h and freebsd64.h */
76#undef RELOCATABLE_NEEDS_FIXUP
77#define RELOCATABLE_NEEDS_FIXUP \
78 (rs6000_isa_flags & rs6000_isa_flags_explicit & OPTION_MASK_RELOCATABLE)
79
80/* Copy and paste from linux64.h */
81#undef RS6000_ABI_NAME
82#define RS6000_ABI_NAME "linux"
83
16bab95a
SH		 84/* Copy and paste from linux64.h and freebsd64.h */
85#define INVALID_64BIT "-m%s not supported in this configuration"
86
87/* A lot of copy and paste from linux64.h and freebsd64.h */
88#undef SUBSUBTARGET_OVERRIDE_OPTIONS
89#define SUBSUBTARGET_OVERRIDE_OPTIONS \
90 do \
91 { \
92 if (rs6000_isa_flags & OPTION_MASK_64BIT) \
93 { \
94 rs6000_elf_abi = 2; \
95 rs6000_current_abi = ABI_ELFv2; \
96 if (rs6000_isa_flags & OPTION_MASK_RELOCATABLE) \
97 { \
98 rs6000_isa_flags &= ~OPTION_MASK_RELOCATABLE; \
99 error (INVALID_64BIT, "relocatable"); \
100 } \
101 if (rs6000_isa_flags & OPTION_MASK_EABI) \
102 { \
103 rs6000_isa_flags &= ~OPTION_MASK_EABI; \
104 error (INVALID_64BIT, "eabi"); \
105 } \
106 if (TARGET_PROTOTYPE) \
107 { \
108 target_prototype = 0; \
109 error (INVALID_64BIT, "prototype"); \
110 } \
111 if ((rs6000_isa_flags & OPTION_MASK_POWERPC64) == 0) \
112 { \
113 rs6000_isa_flags |= OPTION_MASK_POWERPC64; \
a3f9f006 114 error ("%<-m64%> requires a PowerPC64 cpu"); \
16bab95a 115 } \
17691698
SH		 116 if ((rs6000_isa_flags_explicit \
117 & OPTION_MASK_MINIMAL_TOC) != 0) \
118 { \
119 if (global_options_set.x_rs6000_current_cmodel \
120 && rs6000_current_cmodel != CMODEL_SMALL) \
a3f9f006 121 error ("%<-mcmodel%> incompatible with other toc options"); \
17691698
SH		 122 SET_CMODEL (CMODEL_SMALL); \
123 } \
124 else \
125 { \
126 if (!global_options_set.x_rs6000_current_cmodel) \
127 SET_CMODEL (CMODEL_MEDIUM); \
128 if (rs6000_current_cmodel != CMODEL_SMALL) \
129 { \
130 TARGET_NO_FP_IN_TOC = 0; \
131 TARGET_NO_SUM_IN_TOC = 0; \
132 } \
133 } \
16bab95a
SH		 134 } \
135 } \
7990b46f 136 while (0)
0186a143 137
228c1313
SH		 138#undef TARGET_LIBGCC_SDATA_SECTION
139#define TARGET_LIBGCC_SDATA_SECTION ".sdata"
140
16bab95a
SH		 141/* Copy and paste from linux64.h and freebsd64.h */
142#undef SIZE_TYPE
143#define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int")
144
145/* Copy and paste from linux64.h and freebsd64.h */
146#undef PTRDIFF_TYPE
147#define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
148
149/* Copy and paste from freebsd64.h */
150#undef WCHAR_TYPE
151
152/* Copy and paste from freebsd64.h */
153#undef WCHAR_TYPE_SIZE
154#define WCHAR_TYPE_SIZE 32
155
156/* Copy and paste from linux64.h and freebsd64.h */
157#ifdef __powerpc64__
158#define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
159 asm (SECTION_OP "\n" \
160" bl " #FUNC "\n" \
161" nop\n" \
162" .previous");
163#endif
164
165/* This could be also POWERPC_FREEBSD. It is related to the save/restore
166 defines below. */
167#define POWERPC_LINUX
168
169/* Copy and paste from linux64.h and freebsd64.h */
170#undef SAVE_FP_PREFIX
171#define SAVE_FP_PREFIX (TARGET_64BIT ? "._savef" : "_savefpr_")
172#undef SAVE_FP_SUFFIX
173#define SAVE_FP_SUFFIX ""
174#undef RESTORE_FP_PREFIX
175#define RESTORE_FP_PREFIX (TARGET_64BIT ? "._restf" : "_restfpr_")
176#undef RESTORE_FP_SUFFIX
177#define RESTORE_FP_SUFFIX ""
b9d13999 178
17691698
SH		 179/* Copy and paste from linux64.h and freebsd64.h */
180#undef ASM_PREFERRED_EH_DATA_FORMAT
181#define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
182 (TARGET_64BIT || flag_pic \
183 ? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel \
184 | (TARGET_64BIT ? DW_EH_PE_udata8 : DW_EH_PE_sdata4)) \
185 : DW_EH_PE_absptr)
186
187/* Copy and paste from linux64.h and freebsd64.h */
188#undef TOC_SECTION_ASM_OP
189#define TOC_SECTION_ASM_OP \
190 (TARGET_64BIT \
191 ? "\t.section\t\".toc\",\"aw\"" \
192 : "\t.section\t\".got\",\"aw\"")
193
194/* Copy and paste from linux64.h and freebsd64.h */
195#undef MINIMAL_TOC_SECTION_ASM_OP
196#define MINIMAL_TOC_SECTION_ASM_OP \
197 (TARGET_64BIT \
198 ? "\t.section\t\".toc1\",\"aw\"" \
199 : (flag_pic \
200 ? "\t.section\t\".got2\",\"aw\"" \
201 : "\t.section\t\".got1\",\"aw\""))
202
16bab95a
SH		 203/* Copy and paste from linux64.h and freebsd64.h */
204#undef ASM_DECLARE_FUNCTION_SIZE
205#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
206 do \
207 { \
208 if (!flag_inhibit_size_directive) \
209 { \
210 fputs ("\t.size\t", (FILE)); \
211 if (TARGET_64BIT && DOT_SYMBOLS) \
212 putc ('.', (FILE)); \
213 assemble_name ((FILE), (FNAME)); \
214 fputs (",.-", (FILE)); \
215 rs6000_output_function_entry (FILE, FNAME); \
216 putc ('\n', (FILE)); \
217 } \
218 } \
219 while (0)
220
221/* Copy and paste from linux64.h and freebsd64.h */
222#undef ASM_OUTPUT_SPECIAL_POOL_ENTRY_P
223#define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) \
224 (TARGET_TOC \
2e42a52f 225 && (SYMBOL_REF_P (X) \
16bab95a 226 || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \
2e42a52f 227 && SYMBOL_REF_P (XEXP (XEXP (X, 0), 0))) \
16bab95a 228 || GET_CODE (X) == LABEL_REF \
2e42a52f 229 || (CONST_INT_P (X) \
16bab95a 230 && GET_MODE_BITSIZE (MODE) <= GET_MODE_BITSIZE (Pmode)) \
2e42a52f 231 || (CONST_DOUBLE_P (X) \
16bab95a
SH		 232 && ((TARGET_64BIT \
233 && (TARGET_MINIMAL_TOC \
234 || (SCALAR_FLOAT_MODE_P (GET_MODE (X)) \
235 && ! TARGET_NO_FP_IN_TOC))) \
236 || (!TARGET_64BIT \
237 && !TARGET_NO_FP_IN_TOC \
238 && SCALAR_FLOAT_MODE_P (GET_MODE (X)) \
239 && BITS_PER_WORD == HOST_BITS_PER_INT)))))
240
241#undef CPP_OS_DEFAULT_SPEC
242#define CPP_OS_DEFAULT_SPEC "\
b9d13999
RC		 243%{!mcpu*: %{!Dppc*: %{!Dmpc*: -Dmpc750} } }\
244%{mcpu=403: %{!Dppc*: %{!Dmpc*: -Dppc403} } } \
245%{mcpu=505: %{!Dppc*: %{!Dmpc*: -Dmpc505} } } \
246%{mcpu=601: %{!Dppc*: %{!Dmpc*: -Dppc601} } } \
247%{mcpu=602: %{!Dppc*: %{!Dmpc*: -Dppc602} } } \
248%{mcpu=603: %{!Dppc*: %{!Dmpc*: -Dppc603} } } \
249%{mcpu=603e: %{!Dppc*: %{!Dmpc*: -Dppc603e} } } \
250%{mcpu=604: %{!Dppc*: %{!Dmpc*: -Dmpc604} } } \
251%{mcpu=750: %{!Dppc*: %{!Dmpc*: -Dmpc750} } } \
252%{mcpu=821: %{!Dppc*: %{!Dmpc*: -Dmpc821} } } \
bce15ee8 253%{mcpu=860: %{!Dppc*: %{!Dmpc*: -Dmpc860} } } \
887974fd
SH		 254%{mcpu=8540: %{!Dppc*: %{!Dmpc*: -Dppc8540} } } \
255%{mcpu=e6500: -D__PPC_CPU_E6500__}"
b9d13999 256
16bab95a
SH		 257#undef ASM_SPEC
258#define ASM_SPEC "%{!m64:%(asm_spec32)}%{m64:%(asm_spec64)} %(asm_spec_common)"
259
260#define ASM_SPEC32 "-a32 \
261%{mrelocatable} %{mrelocatable-lib} %{" FPIE_OR_FPIC_SPEC ":-K PIC} \
262%{memb|msdata=eabi: -memb}"
263
264#define ASM_SPEC64 "-a64"
265
266#define ASM_SPEC_COMMON "%(asm_cpu) \
267%{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}}" \
268 ENDIAN_SELECT(" -mbig", " -mlittle", DEFAULT_ASM_ENDIAN)
269
270#undef LINK_OS_DEFAULT_SPEC
271#define LINK_OS_DEFAULT_SPEC \
272"%{!m64:%(link_os_spec32)}%{m64:%(link_os_spec64)}"
273
274#define LINK_OS_SPEC32 ENDIAN_SELECT(" -m elf32ppc", \
275 " -m elf32lppc", \
276 " -m elf32ppc")
277#define LINK_OS_SPEC64 ENDIAN_SELECT(" -m elf64ppc", \
278 " -m elf64lppc", \
279 " -m elf64ppc")
280
b9d13999
RC		 281#undef SUBSUBTARGET_EXTRA_SPECS
282#define SUBSUBTARGET_EXTRA_SPECS \
16bab95a
SH		 283 { "asm_spec_common", ASM_SPEC_COMMON }, \
284 { "asm_spec32", ASM_SPEC32 }, \
285 { "asm_spec64", ASM_SPEC64 }, \
286 { "link_os_spec32", LINK_OS_SPEC32 }, \
287 { "link_os_spec64", LINK_OS_SPEC64 },
62045234
AM		 288
289/* Use gnu-user.h LINK_GCC_SEQUENCE_SPEC for rtems. */
290#undef LINK_GCC_C_SEQUENCE_SPEC
291#define LINK_GCC_C_SEQUENCE_SPEC \
292 "%{mads|myellowknife|mmvme|msim:%G %L %G;" \
293 "!mcall-*|mcall-linux:" GNU_USER_TARGET_LINK_GCC_C_SEQUENCE_SPEC ";" \
294 ":%G %L %G}"
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