1 | /* |
---|
2 | * Copyright (c) 1996-2007 MIPS Technologies, Inc. |
---|
3 | * Copyright (C) 2009 CodeSourcery, LLC. |
---|
4 | * |
---|
5 | * All rights reserved. |
---|
6 | * |
---|
7 | * Redistribution and use in source and binary forms, with or without |
---|
8 | * modification, are permitted provided that the following conditions |
---|
9 | * are met: |
---|
10 | * |
---|
11 | * * Redistributions of source code must retain the above copyright |
---|
12 | * notice, this list of conditions and the following disclaimer. |
---|
13 | * * Redistributions in binary form must reproduce the above |
---|
14 | * copyright |
---|
15 | * notice, this list of conditions and the following disclaimer |
---|
16 | * in the documentation and/or other materials provided with |
---|
17 | * the distribution. |
---|
18 | * * Neither the name of MIPS Technologies Inc. nor the names of its |
---|
19 | * contributors may be used to endorse or promote products derived |
---|
20 | * from this software without specific prior written permission. |
---|
21 | * |
---|
22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
---|
23 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
---|
24 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
---|
25 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
---|
26 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
---|
27 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
---|
28 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
---|
29 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
---|
30 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
---|
31 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
---|
32 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
---|
33 | */ |
---|
34 | |
---|
35 | /* |
---|
36 | * asm.h: various macros to help assembly language writers |
---|
37 | */ |
---|
38 | |
---|
39 | #ifndef _MIPS_ASM_H_ |
---|
40 | #define _MIPS_ASM_H_ |
---|
41 | |
---|
42 | /* ABI specific stack frame layout and manipulation. */ |
---|
43 | #if _MIPS_SIM==_ABIO32 && ! __mips64 |
---|
44 | /* Standard O32 */ |
---|
45 | #define SZREG 4 /* saved register size */ |
---|
46 | #define REG_S sw /* store saved register */ |
---|
47 | #define REG_L lw /* load saved register */ |
---|
48 | #define SZARG 4 /* argument register size */ |
---|
49 | #define NARGSAVE 4 /* arg register space on caller stack */ |
---|
50 | #define ALSZ 7 /* stack alignment - 1 */ |
---|
51 | #define ALMASK (~7) /* stack alignment mask */ |
---|
52 | #define LOG2_STACK_ALGN 3 /* log2(8) */ |
---|
53 | #define SZPTR 4 /* pointer size */ |
---|
54 | #define LOG2_SZPTR 2 /* log2(4) */ |
---|
55 | #define PTR_S sw /* store pointer */ |
---|
56 | #define PTR_L lw /* load pointer */ |
---|
57 | #define PTR_SUBU subu /* decrement pointer */ |
---|
58 | #define PTR_ADDU addu /* increment pointer */ |
---|
59 | #define PTR .word /* pointer type pseudo */ |
---|
60 | #elif _MIPS_SIM==_ABIO32 && __mips64 |
---|
61 | /* Algorithmics O32+64-bit */ |
---|
62 | #define SZREG 8 /* saved register size */ |
---|
63 | #define REG_S sd /* store saved register */ |
---|
64 | #define REG_L ld /* load saved register */ |
---|
65 | #define SZARG 4 /* argument register size */ |
---|
66 | #define NARGSAVE 4 /* arg register space on caller stack */ |
---|
67 | #define ALSZ 7 /* stack alignment - 1 */ |
---|
68 | #define ALMASK (~7) /* stack alignment mask */ |
---|
69 | #define LOG2_STACK_ALGN 3 /* log2(8) */ |
---|
70 | #define SZPTR 4 /* pointer size */ |
---|
71 | #define LOG2_SZPTR 2 /* log2(4) */ |
---|
72 | #define PTR_S sw /* store pointer */ |
---|
73 | #define PTR_L lw /* load pointer */ |
---|
74 | #define PTR_SUBU subu /* decrement pointer */ |
---|
75 | #define PTR_ADDU addu /* increment pointer */ |
---|
76 | #define PTR .word /* pointer type pseudo */ |
---|
77 | #elif _MIPS_SIM==_ABIO64 |
---|
78 | /* Cygnus O64 */ |
---|
79 | #define SZREG 8 /* saved register size */ |
---|
80 | #define REG_S sd /* store saved register */ |
---|
81 | #define REG_L ld /* load saved register */ |
---|
82 | #define SZARG 8 /* argument register size */ |
---|
83 | #define NARGSAVE 4 /* arg register space on caller stack */ |
---|
84 | #define ALSZ 7 /* stack alignment - 1 */ |
---|
85 | #define ALMASK (~7) /* stack alignment mask */ |
---|
86 | #define LOG2_STACK_ALGN 3 /* log2(8) */ |
---|
87 | #define SZPTR 4 /* pointer size */ |
---|
88 | #define LOG2_SZPTR 2 /* log2(4) */ |
---|
89 | #define PTR_S sw /* store pointer */ |
---|
90 | #define PTR_L lw /* load pointer */ |
---|
91 | #define PTR_SUBU subu /* decrement pointer */ |
---|
92 | #define PTR_ADDU addu /* increment pointer */ |
---|
93 | #define PTR .word /* pointer type pseudo */ |
---|
94 | #elif _MIPS_SIM==_ABIN32 |
---|
95 | /* Standard N32 */ |
---|
96 | #define SZREG 8 /* saved register size */ |
---|
97 | #define REG_S sd /* store saved register */ |
---|
98 | #define REG_L ld /* load saved register */ |
---|
99 | #define SZARG 8 /* argument register size */ |
---|
100 | #define NARGSAVE 0 /* arg register space on caller stack */ |
---|
101 | #define ALSZ 15 /* stack alignment - 1 */ |
---|
102 | #define ALMASK (~15) /* stack alignment mask */ |
---|
103 | #define LOG2_STACK_ALGN 4 /* log2(16) */ |
---|
104 | #define SZPTR 4 /* pointer size */ |
---|
105 | #define LOG2_SZPTR 2 /* log2(4) */ |
---|
106 | #define PTR_S sw /* store pointer */ |
---|
107 | #define PTR_L lw /* load pointer */ |
---|
108 | #define PTR_SUBU subu /* decrement pointer (SGI uses sub) */ |
---|
109 | #define PTR_ADDU addu /* increment pointer (SGI uses add) */ |
---|
110 | #define PTR .word /* pointer type pseudo */ |
---|
111 | #elif _MIPS_SIM==_ABI64 |
---|
112 | /* Standard N64 */ |
---|
113 | #define SZREG 8 /* saved register size */ |
---|
114 | #define REG_S sd /* store saved register */ |
---|
115 | #define REG_L ld /* load saved register */ |
---|
116 | #define SZARG 8 /* argument register size */ |
---|
117 | #define NARGSAVE 0 /* arg register space on caller stack */ |
---|
118 | #define ALSZ 15 /* stack alignment - 1 */ |
---|
119 | #define ALMASK (~15) /* stack alignment mask */ |
---|
120 | #define LOG2_STACK_ALGN 4 /* log2(16) */ |
---|
121 | #define SZPTR 8 /* pointer size */ |
---|
122 | #define LOG2_SZPTR 3 /* log2(8) */ |
---|
123 | #define PTR_S sd /* store pointer */ |
---|
124 | #define PTR_L ld /* load pointer */ |
---|
125 | #define PTR_SUBU dsubu /* decrement pointer */ |
---|
126 | #define PTR_ADDU daddu /* increment pointer */ |
---|
127 | #define PTR .dword /* pointer type pseudo */ |
---|
128 | #else |
---|
129 | #error Unknown ABI |
---|
130 | #endif |
---|
131 | |
---|
132 | /* Concatenate two names. */ |
---|
133 | #ifdef __STDC__ |
---|
134 | # define _ASMCONCAT(A, B) A ## B |
---|
135 | #else |
---|
136 | # define _ASMCONCAT(A, B) A/**/B |
---|
137 | #endif |
---|
138 | |
---|
139 | /* Name of reset code section. */ |
---|
140 | #ifndef _RESET_SECTION |
---|
141 | # define _RESET_SECTION .section .reset, "ax", @progbits |
---|
142 | #endif |
---|
143 | |
---|
144 | #ifndef _RESET_SECTION_NAMED |
---|
145 | /* No function section support for now, since binutils fails to cope with |
---|
146 | external branches. */ |
---|
147 | # define _RESET_SECTION_NAMED(name) .pushsection .reset, "ax", @progbits |
---|
148 | #endif |
---|
149 | |
---|
150 | /* Name of boot code section. */ |
---|
151 | #ifndef _BOOT_SECTION |
---|
152 | # define _BOOT_SECTION .section .boot, "ax", @progbits |
---|
153 | #endif |
---|
154 | |
---|
155 | #ifndef _BOOT_SECTION_NAMED |
---|
156 | /* No function section support for now, since binutils fails to cope with |
---|
157 | external branches. */ |
---|
158 | # define _BOOT_SECTION_NAMED(name) .pushsection .boot, "ax", @progbits |
---|
159 | #endif |
---|
160 | |
---|
161 | /* Name of standard code section. */ |
---|
162 | #ifndef _NORMAL_SECTION_UNNAMED |
---|
163 | # define _NORMAL_SECTION_UNNAMED .section .text, "ax", @progbits |
---|
164 | #endif |
---|
165 | |
---|
166 | #ifndef _NORMAL_SECTION_NAMED |
---|
167 | # ifdef _FUNCTION_SECTIONS_ |
---|
168 | # define _NORMAL_SECTION_NAMED(name) .pushsection .text ##.name, "ax", @progbits |
---|
169 | # else |
---|
170 | # define _NORMAL_SECTION_NAMED(name) .pushsection .text, "ax", @progbits |
---|
171 | # endif |
---|
172 | #endif |
---|
173 | |
---|
174 | /* Default code section. */ |
---|
175 | #ifndef _TEXT_SECTION_NAMED |
---|
176 | # if defined(_RESETCODE) |
---|
177 | # define _TEXT_SECTION_NAMED _RESET_SECTION_NAMED |
---|
178 | # elif defined(_BOOTCODE) |
---|
179 | # define _TEXT_SECTION_NAMED _BOOT_SECTION_NAMED |
---|
180 | # else |
---|
181 | # define _TEXT_SECTION_NAMED _NORMAL_SECTION_NAMED |
---|
182 | # endif |
---|
183 | #endif |
---|
184 | |
---|
185 | #ifndef _TEXT_SECTION |
---|
186 | # if defined(_RESETCODE) |
---|
187 | # define _TEXT_SECTION _RESET_SECTION |
---|
188 | # elif defined(_BOOTCODE) |
---|
189 | # define _TEXT_SECTION _BOOT_SECTION |
---|
190 | # else |
---|
191 | # define _TEXT_SECTION _NORMAL_SECTION_UNNAMED |
---|
192 | # endif |
---|
193 | _TEXT_SECTION |
---|
194 | #endif |
---|
195 | |
---|
196 | /* |
---|
197 | * Leaf functions declarations. |
---|
198 | */ |
---|
199 | |
---|
200 | /* Global leaf function. */ |
---|
201 | #define LEAF(name) \ |
---|
202 | _TEXT_SECTION_NAMED(name); \ |
---|
203 | .globl name; \ |
---|
204 | .balign 4; \ |
---|
205 | .ent name; \ |
---|
206 | name: |
---|
207 | |
---|
208 | /* Static/Local leaf function. */ |
---|
209 | #define SLEAF(name) \ |
---|
210 | _TEXT_SECTION_NAMED(name); \ |
---|
211 | .balign 4; \ |
---|
212 | .ent name; \ |
---|
213 | name: |
---|
214 | |
---|
215 | /* Weak leaf function. */ |
---|
216 | #define WLEAF(name) \ |
---|
217 | _TEXT_SECTION_NAMED(name); \ |
---|
218 | .weakext name; \ |
---|
219 | .balign 4; \ |
---|
220 | .ent name; \ |
---|
221 | name: |
---|
222 | |
---|
223 | /* Weak alias leaf function. */ |
---|
224 | #define ALEAF(name,alias) \ |
---|
225 | _TEXT_SECTION_NAMED(name); \ |
---|
226 | .weakext alias,name; \ |
---|
227 | .balign 4; \ |
---|
228 | .ent name; \ |
---|
229 | name: |
---|
230 | |
---|
231 | /* |
---|
232 | * Alternative function entrypoints. |
---|
233 | */ |
---|
234 | |
---|
235 | /* Global alternative entrypoint. */ |
---|
236 | #define AENT(name) \ |
---|
237 | .globl name; \ |
---|
238 | .balign 4; \ |
---|
239 | .aent name; \ |
---|
240 | name: |
---|
241 | #define XLEAF(name) AENT(name) |
---|
242 | |
---|
243 | /* Local/static alternative entrypoint. */ |
---|
244 | #define SAENT(name) \ |
---|
245 | .balign 4; \ |
---|
246 | .aent name; \ |
---|
247 | name: |
---|
248 | #define SXLEAF(name) SAENT(name) |
---|
249 | |
---|
250 | |
---|
251 | /* |
---|
252 | * Leaf functions declarations. |
---|
253 | */ |
---|
254 | |
---|
255 | /* Global nested function. */ |
---|
256 | #define NESTED(name, framesz, rareg) \ |
---|
257 | _TEXT_SECTION_NAMED(name); \ |
---|
258 | .globl name; \ |
---|
259 | .balign 4; \ |
---|
260 | .ent name; \ |
---|
261 | .frame sp, framesz, rareg; \ |
---|
262 | name: |
---|
263 | |
---|
264 | /* Static/Local nested function. */ |
---|
265 | #define SNESTED(name, framesz, rareg) \ |
---|
266 | _TEXT_SECTION_NAMED(name); \ |
---|
267 | .balign 4; \ |
---|
268 | .ent name; \ |
---|
269 | .frame sp, framesz, rareg; \ |
---|
270 | name: |
---|
271 | |
---|
272 | /* Weak nested function. */ |
---|
273 | #define WNESTED(name, framesz, rareg) \ |
---|
274 | _TEXT_SECTION_NAMED(name); \ |
---|
275 | .weakext name; \ |
---|
276 | .balign 4; \ |
---|
277 | .ent name; \ |
---|
278 | .frame sp, framesz, rareg; \ |
---|
279 | name: |
---|
280 | |
---|
281 | /* Weak alias nested function. */ |
---|
282 | #define ANESTED(name, alias, framesz, rareg) \ |
---|
283 | _TEXT_SECTION_NAMED(name); \ |
---|
284 | .weakext alias, name; \ |
---|
285 | .balign 4; \ |
---|
286 | .ent name; \ |
---|
287 | .frame sp, framesz, rareg; \ |
---|
288 | name: |
---|
289 | |
---|
290 | /* |
---|
291 | * Function termination |
---|
292 | */ |
---|
293 | #define END(name) \ |
---|
294 | .size name,.-name; \ |
---|
295 | .end name; \ |
---|
296 | .popsection |
---|
297 | |
---|
298 | #define SEND(name) END(name) |
---|
299 | #define WEND(name) END(name) |
---|
300 | #define AEND(name,alias) END(name) |
---|
301 | |
---|
302 | /* |
---|
303 | * Global data declaration. |
---|
304 | */ |
---|
305 | #define EXPORT(name) \ |
---|
306 | .globl name; \ |
---|
307 | .type name,@object; \ |
---|
308 | name: |
---|
309 | |
---|
310 | /* |
---|
311 | * Global data declaration with size. |
---|
312 | */ |
---|
313 | #define EXPORTS(name,sz) \ |
---|
314 | .globl name; \ |
---|
315 | .type name,@object; \ |
---|
316 | .size name,sz; \ |
---|
317 | name: |
---|
318 | |
---|
319 | /* |
---|
320 | * Weak data declaration with size. |
---|
321 | */ |
---|
322 | #define WEXPORT(name,sz) \ |
---|
323 | .weakext name; \ |
---|
324 | .type name,@object; \ |
---|
325 | .size name,sz; \ |
---|
326 | name: |
---|
327 | |
---|
328 | /* |
---|
329 | * Global data reference with size. |
---|
330 | */ |
---|
331 | #define IMPORT(name, size) \ |
---|
332 | .extern name,size |
---|
333 | |
---|
334 | /* |
---|
335 | * Global zeroed data. |
---|
336 | */ |
---|
337 | #define BSS(name,size) \ |
---|
338 | .type name,@object; \ |
---|
339 | .comm name,size |
---|
340 | |
---|
341 | /* |
---|
342 | * Local zeroed data. |
---|
343 | */ |
---|
344 | #define LBSS(name,size) \ |
---|
345 | .lcomm name,size |
---|
346 | |
---|
347 | /* |
---|
348 | * Insert call to _mcount if profiling. |
---|
349 | */ |
---|
350 | #ifdef __PROFILING__ |
---|
351 | #define _MCOUNT \ |
---|
352 | .set push; \ |
---|
353 | .set noat; \ |
---|
354 | move $1,$31; \ |
---|
355 | jal _mcount; \ |
---|
356 | .set pop |
---|
357 | #else |
---|
358 | #define _MCOUNT |
---|
359 | #endif |
---|
360 | |
---|
361 | #endif |
---|