1 /* Definitions for rtems targeting a PowerPC using elf.
2 Copyright (C) 1996-2023 Free Software Foundation, Inc.
3 Contributed by Joel Sherrill (joel@OARcorp.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 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
24 <http://www.gnu.org/licenses/>. */
25
26 /* Undef gnu-user.h macro we don't want. */
27 #undef CPLUSPLUS_CPP_SPEC
28
29 /* Copy and paste from linux64.h and freebsd64.h */
30 #ifdef IN_LIBGCC2
31 #undef TARGET_64BIT
32 #ifdef __powerpc64__
33 #define TARGET_64BIT 1
34 #else
35 #define TARGET_64BIT 0
36 #endif
37 #endif
38
39 /* Copy and paste from linux64.h and freebsd64.h */
40 #undef TARGET_AIX
41 #define TARGET_AIX TARGET_64BIT
42
43 /* Simplified copy and paste from linux64.h and freebsd64.h */
44 #undef DOT_SYMBOLS
45 #define DOT_SYMBOLS 0
46
47 /* Copy and paste from linux64.h and freebsd64.h */
48 #undef TARGET_CMODEL
49 #define TARGET_CMODEL rs6000_current_cmodel
50 #define SET_CMODEL(opt) rs6000_current_cmodel = opt
51
52 #undef TARGET_OS_CPP_BUILTINS
53 #define TARGET_OS_CPP_BUILTINS() \
54 do \
55 { \
56 builtin_define ("__rtems__"); \
57 builtin_define ("__USE_INIT_FINI__"); \
58 builtin_assert ("system=rtems"); \
59 if (TARGET_64BIT) \
60 { \
61 builtin_define ("__PPC__"); \
62 builtin_define ("__PPC64__"); \
63 builtin_define ("__powerpc64__"); \
64 builtin_assert ("cpu=powerpc64"); \
65 builtin_assert ("machine=powerpc64"); \
66 } \
67 else \
68 { \
69 builtin_define_std ("PPC"); \
70 builtin_define_std ("powerpc"); \
71 builtin_assert ("cpu=powerpc"); \
72 builtin_assert ("machine=powerpc"); \
73 TARGET_OS_SYSV_CPP_BUILTINS (); \
74 } \
75 } \
76 while (0)
77
78 /* Copy and paste from linux64.h and freebsd64.h */
79 #undef RELOCATABLE_NEEDS_FIXUP
80 #define RELOCATABLE_NEEDS_FIXUP \
81 (rs6000_isa_flags & rs6000_isa_flags_explicit & OPTION_MASK_RELOCATABLE)
82
83 /* Copy and paste from linux64.h */
84 #undef RS6000_ABI_NAME
85 #define RS6000_ABI_NAME "linux"
86
87 /* Copy and paste from linux64.h and freebsd64.h */
88 #define INVALID_64BIT "%<-m%s%> not supported in this configuration"
89
90 /* A lot of copy and paste from linux64.h and freebsd64.h */
91 #undef SUBSUBTARGET_OVERRIDE_OPTIONS
92 #define SUBSUBTARGET_OVERRIDE_OPTIONS \
93 do \
94 { \
95 if (rs6000_isa_flags & OPTION_MASK_64BIT) \
96 { \
97 rs6000_elf_abi = 2; \
98 rs6000_current_abi = ABI_ELFv2; \
99 if (rs6000_isa_flags & OPTION_MASK_RELOCATABLE) \
100 { \
101 rs6000_isa_flags &= ~OPTION_MASK_RELOCATABLE; \
102 error (INVALID_64BIT, "relocatable"); \
103 } \
104 if (rs6000_isa_flags & OPTION_MASK_EABI) \
105 { \
106 rs6000_isa_flags &= ~OPTION_MASK_EABI; \
107 error (INVALID_64BIT, "eabi"); \
108 } \
109 if (TARGET_PROTOTYPE) \
110 { \
111 target_prototype = 0; \
112 error (INVALID_64BIT, "prototype"); \
113 } \
114 if ((rs6000_isa_flags & OPTION_MASK_POWERPC64) == 0) \
115 { \
116 rs6000_isa_flags |= OPTION_MASK_POWERPC64; \
117 error ("%<-m64%> requires a PowerPC64 cpu"); \
118 } \
119 if ((rs6000_isa_flags_explicit \
120 & OPTION_MASK_MINIMAL_TOC) != 0) \
121 { \
122 if (OPTION_SET_P (rs6000_current_cmodel) \
123 && rs6000_current_cmodel != CMODEL_SMALL) \
124 error ("%<-mcmodel%> incompatible with other toc options"); \
125 SET_CMODEL (CMODEL_SMALL); \
126 } \
127 else \
128 { \
129 if (!OPTION_SET_P (rs6000_current_cmodel)) \
130 SET_CMODEL (CMODEL_MEDIUM); \
131 if (rs6000_current_cmodel != CMODEL_SMALL) \
132 { \
133 TARGET_NO_FP_IN_TOC = 0; \
134 TARGET_NO_SUM_IN_TOC = 0; \
135 } \
136 } \
137 } \
138 } \
139 while (0)
140
141 #undef TARGET_LIBGCC_SDATA_SECTION
142 #define TARGET_LIBGCC_SDATA_SECTION ".sdata"
143
144 /* Copy and paste from linux64.h and freebsd64.h */
145 #undef SIZE_TYPE
146 #define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int")
147
148 /* Copy and paste from linux64.h and freebsd64.h */
149 #undef PTRDIFF_TYPE
150 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
151
152 /* Copy and paste from freebsd64.h */
153 #undef WCHAR_TYPE
154
155 /* Copy and paste from freebsd64.h */
156 #undef WCHAR_TYPE_SIZE
157 #define WCHAR_TYPE_SIZE 32
158
159 /* Copy and paste from linux64.h and freebsd64.h */
160 #ifdef __powerpc64__
161 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
162 asm (SECTION_OP "\n" \
163 " bl " #FUNC "\n" \
164 " nop\n" \
165 " .previous");
166 #endif
167
168 /* This could be also POWERPC_FREEBSD. It is related to the save/restore
169 defines below. */
170 #define POWERPC_LINUX
171
172 /* Copy and paste from linux64.h and freebsd64.h */
173 #undef SAVE_FP_PREFIX
174 #define SAVE_FP_PREFIX (TARGET_64BIT ? "._savef" : "_savefpr_")
175 #undef SAVE_FP_SUFFIX
176 #define SAVE_FP_SUFFIX ""
177 #undef RESTORE_FP_PREFIX
178 #define RESTORE_FP_PREFIX (TARGET_64BIT ? "._restf" : "_restfpr_")
179 #undef RESTORE_FP_SUFFIX
180 #define RESTORE_FP_SUFFIX ""
181
182 /* Copy and paste from linux64.h and freebsd64.h */
183 #undef ASM_PREFERRED_EH_DATA_FORMAT
184 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
185 (TARGET_64BIT || flag_pic \
186 ? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel \
187 | (TARGET_64BIT ? DW_EH_PE_udata8 : DW_EH_PE_sdata4)) \
188 : DW_EH_PE_absptr)
189
190 /* Copy and paste from linux64.h and freebsd64.h */
191 #undef TOC_SECTION_ASM_OP
192 #define TOC_SECTION_ASM_OP \
193 (TARGET_64BIT \
194 ? "\t.section\t\".toc\",\"aw\"" \
195 : "\t.section\t\".got\",\"aw\"")
196
197 /* Copy and paste from linux64.h and freebsd64.h */
198 #undef MINIMAL_TOC_SECTION_ASM_OP
199 #define MINIMAL_TOC_SECTION_ASM_OP \
200 (TARGET_64BIT \
201 ? "\t.section\t\".toc1\",\"aw\"" \
202 : (flag_pic \
203 ? "\t.section\t\".got2\",\"aw\"" \
204 : "\t.section\t\".got1\",\"aw\""))
205
206 /* Copy and paste from linux64.h and freebsd64.h */
207 #undef ASM_DECLARE_FUNCTION_SIZE
208 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
209 do \
210 { \
211 if (!flag_inhibit_size_directive) \
212 { \
213 fputs ("\t.size\t", (FILE)); \
214 if (TARGET_64BIT && DOT_SYMBOLS) \
215 putc ('.', (FILE)); \
216 assemble_name ((FILE), (FNAME)); \
217 fputs (",.-", (FILE)); \
218 rs6000_output_function_entry (FILE, FNAME); \
219 putc ('\n', (FILE)); \
220 } \
221 } \
222 while (0)
223
224 /* Copy and paste from linux64.h and freebsd64.h */
225 #undef ASM_OUTPUT_SPECIAL_POOL_ENTRY_P
226 #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) \
227 (TARGET_TOC \
228 && (SYMBOL_REF_P (X) \
229 || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \
230 && SYMBOL_REF_P (XEXP (XEXP (X, 0), 0))) \
231 || GET_CODE (X) == LABEL_REF \
232 || (CONST_INT_P (X) \
233 && GET_MODE_BITSIZE (MODE) <= GET_MODE_BITSIZE (Pmode)) \
234 || (CONST_DOUBLE_P (X) \
235 && ((TARGET_64BIT \
236 && (TARGET_MINIMAL_TOC \
237 || (SCALAR_FLOAT_MODE_P (GET_MODE (X)) \
238 && ! TARGET_NO_FP_IN_TOC))) \
239 || (!TARGET_64BIT \
240 && !TARGET_NO_FP_IN_TOC \
241 && SCALAR_FLOAT_MODE_P (GET_MODE (X)) \
242 && BITS_PER_WORD == HOST_BITS_PER_INT)))))
243
244 #undef CPP_OS_DEFAULT_SPEC
245 #define CPP_OS_DEFAULT_SPEC "\
246 %{!mcpu*: %{!Dppc*: %{!Dmpc*: -Dmpc750} } }\
247 %{mcpu=403: %{!Dppc*: %{!Dmpc*: -Dppc403} } } \
248 %{mcpu=505: %{!Dppc*: %{!Dmpc*: -Dmpc505} } } \
249 %{mcpu=601: %{!Dppc*: %{!Dmpc*: -Dppc601} } } \
250 %{mcpu=602: %{!Dppc*: %{!Dmpc*: -Dppc602} } } \
251 %{mcpu=603: %{!Dppc*: %{!Dmpc*: -Dppc603} } } \
252 %{mcpu=603e: %{!Dppc*: %{!Dmpc*: -Dppc603e} } } \
253 %{mcpu=604: %{!Dppc*: %{!Dmpc*: -Dmpc604} } } \
254 %{mcpu=750: %{!Dppc*: %{!Dmpc*: -Dmpc750} } } \
255 %{mcpu=821: %{!Dppc*: %{!Dmpc*: -Dmpc821} } } \
256 %{mcpu=860: %{!Dppc*: %{!Dmpc*: -Dmpc860} } } \
257 %{mcpu=8540: %{!Dppc*: %{!Dmpc*: -Dppc8540} } } \
258 %{mcpu=e6500: -D__PPC_CPU_E6500__} \
259 %{mvrsave: -D__PPC_VRSAVE__}"
260
261 #undef ASM_SPEC
262 #define ASM_SPEC "%{!m64:%(asm_spec32)}%{m64:%(asm_spec64)} %(asm_spec_common)"
263
264 #define ASM_SPEC32 "-a32 \
265 %{mrelocatable} %{mrelocatable-lib} %{" FPIE_OR_FPIC_SPEC ":-K PIC} \
266 %{memb|msdata=eabi: -memb}"
267
268 #define ASM_SPEC64 "-a64"
269
270 #define ASM_SPEC_COMMON "%(asm_cpu) \
271 %{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}}" \
272 ENDIAN_SELECT(" -mbig", " -mlittle", DEFAULT_ASM_ENDIAN)
273
274 #undef LINK_OS_DEFAULT_SPEC
275 #define LINK_OS_DEFAULT_SPEC \
276 "%{!m64:%(link_os_spec32)}%{m64:%(link_os_spec64)}"
277
278 #define LINK_OS_SPEC32 ENDIAN_SELECT(" -m elf32ppc", \
279 " -m elf32lppc", \
280 " -m elf32ppc")
281 #define LINK_OS_SPEC64 ENDIAN_SELECT(" -m elf64ppc", \
282 " -m elf64lppc", \
283 " -m elf64ppc")
284
285 #undef SUBSUBTARGET_EXTRA_SPECS
286 #define SUBSUBTARGET_EXTRA_SPECS \
287 { "asm_spec_common", ASM_SPEC_COMMON }, \
288 { "asm_spec32", ASM_SPEC32 }, \
289 { "asm_spec64", ASM_SPEC64 }, \
290 { "link_os_spec32", LINK_OS_SPEC32 }, \
291 { "link_os_spec64", LINK_OS_SPEC64 },
292
293 /* Use gnu-user.h LINK_GCC_SEQUENCE_SPEC for rtems. */
294 #undef LINK_GCC_C_SEQUENCE_SPEC
295 #define LINK_GCC_C_SEQUENCE_SPEC \
296 "%{mads|myellowknife|mmvme|msim:%G %L %G;" \
297 "!mcall-*|mcall-linux:" GNU_USER_TARGET_LINK_GCC_C_SEQUENCE_SPEC ";" \
298 ":%G %L %G}"
299
300 #define RTEMS_STARTFILE_SPEC "ecrti%O%s rtems_crti%O%s crtbegin%O%s"
301 #define RTEMS_ENDFILE_SPEC "crtend%O%s rtems_crtn%O%s ecrtn%O%s"