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1 | /* | |
2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. | |
3 | * | |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ | |
5 | * | |
6 | * This file contains Original Code and/or Modifications of Original Code | |
7 | * as defined in and that are subject to the Apple Public Source License | |
8 | * Version 2.0 (the 'License'). You may not use this file except in | |
9 | * compliance with the License. The rights granted to you under the License | |
10 | * may not be used to create, or enable the creation or redistribution of, | |
11 | * unlawful or unlicensed copies of an Apple operating system, or to | |
12 | * circumvent, violate, or enable the circumvention or violation of, any | |
13 | * terms of an Apple operating system software license agreement. | |
14 | * | |
15 | * Please obtain a copy of the License at | |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. | |
17 | * | |
18 | * The Original Code and all software distributed under the License are | |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
23 | * Please see the License for the specific language governing rights and | |
24 | * limitations under the License. | |
25 | * | |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ | |
27 | */ | |
28 | /* | |
29 | * @OSF_COPYRIGHT@ | |
30 | */ | |
31 | /* | |
32 | * Mach Operating System | |
33 | * Copyright (c) 1991,1990,1989 Carnegie Mellon University | |
34 | * All Rights Reserved. | |
35 | * | |
36 | * Permission to use, copy, modify and distribute this software and its | |
37 | * documentation is hereby granted, provided that both the copyright | |
38 | * notice and this permission notice appear in all copies of the | |
39 | * software, derivative works or modified versions, and any portions | |
40 | * thereof, and that both notices appear in supporting documentation. | |
41 | * | |
42 | * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" | |
43 | * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR | |
44 | * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. | |
45 | * | |
46 | * Carnegie Mellon requests users of this software to return to | |
47 | * | |
48 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU | |
49 | * School of Computer Science | |
50 | * Carnegie Mellon University | |
51 | * Pittsburgh PA 15213-3890 | |
52 | * | |
53 | * any improvements or extensions that they make and grant Carnegie Mellon | |
54 | * the rights to redistribute these changes. | |
55 | */ | |
56 | ||
57 | #ifndef _I386_ASM_H_ | |
58 | #define _I386_ASM_H_ | |
59 | ||
60 | #ifdef _KERNEL | |
61 | #include <gprof.h> | |
62 | #endif /* _KERNEL */ | |
63 | ||
64 | #ifdef MACH_KERNEL | |
65 | #include <mach_kdb.h> | |
66 | #else /* !MACH_KERNEL */ | |
67 | #define MACH_KDB 0 | |
68 | #endif /* !MACH_KERNEL */ | |
69 | ||
70 | ||
71 | #if defined(MACH_KERNEL) || defined(_KERNEL) | |
72 | #include <gprof.h> | |
73 | #endif /* MACH_KERNEL || _KERNEL */ | |
74 | ||
75 | #if defined(__i386__) | |
76 | ||
77 | #define S_PC (%esp) | |
78 | #define S_ARG0 4(%esp) | |
79 | #define S_ARG1 8(%esp) | |
80 | #define S_ARG2 12(%esp) | |
81 | #define S_ARG3 16(%esp) | |
82 | #define S_ARG4 20(%esp) | |
83 | ||
84 | #define FRAME pushl %ebp; movl %esp, %ebp | |
85 | #define EMARF leave | |
86 | ||
87 | #define B_LINK (%ebp) | |
88 | #define B_PC 4(%ebp) | |
89 | #define B_ARG0 8(%ebp) | |
90 | #define B_ARG1 12(%ebp) | |
91 | #define B_ARG2 16(%ebp) | |
92 | #define B_ARG3 20(%ebp) | |
93 | ||
94 | #elif defined(__x86_64__) | |
95 | ||
96 | #define S_PC (%rsp) | |
97 | ||
98 | #define FRAME pushq %rbp; movq %rsp, %rbp | |
99 | #define EMARF leave | |
100 | ||
101 | #define B_LINK (%rbp) | |
102 | #define B_PC 8(%rbp) | |
103 | ||
104 | #else | |
105 | #error unsupported architecture | |
106 | #endif | |
107 | ||
108 | /* There is another definition of ALIGN for .c sources */ | |
109 | #ifdef ASSEMBLER | |
110 | #define ALIGN 4,0x90 | |
111 | #endif /* ASSEMBLER */ | |
112 | ||
113 | #ifndef FALIGN | |
114 | #define FALIGN ALIGN | |
115 | #endif | |
116 | ||
117 | #define LB(x,n) n | |
118 | #if __STDC__ | |
119 | #ifndef __NO_UNDERSCORES__ | |
120 | #define LCL(x) L ## x | |
121 | #define EXT(x) _ ## x | |
122 | #define LEXT(x) _ ## x ## : | |
123 | #else | |
124 | #define LCL(x) .L ## x | |
125 | #define EXT(x) x | |
126 | #define LEXT(x) x ## : | |
127 | #endif | |
128 | #define LBc(x,n) n ## : | |
129 | #define LBb(x,n) n ## b | |
130 | #define LBf(x,n) n ## f | |
131 | #else /* __STDC__ */ | |
132 | #ifndef __NO_UNDERSCORES__ | |
133 | #define LCL(x) L/**/x | |
134 | #define EXT(x) _/**/x | |
135 | #define LEXT(x) _/**/x/**/: | |
136 | #else /* __NO_UNDERSCORES__ */ | |
137 | #define LCL(x) .L/**/x | |
138 | #define EXT(x) x | |
139 | #define LEXT(x) x/**/: | |
140 | #endif /* __NO_UNDERSCORES__ */ | |
141 | #define LBc(x,n) n/**/: | |
142 | #define LBb(x,n) n/**/b | |
143 | #define LBf(x,n) n/**/f | |
144 | #endif /* __STDC__ */ | |
145 | ||
146 | #define SVC .byte 0x9a; .long 0; .word 0x7 | |
147 | ||
148 | #define RPC_SVC .byte 0x9a; .long 0; .word 0xf | |
149 | ||
150 | #define String .asciz | |
151 | #define Value .word | |
152 | #define Times(a,b) (a*b) | |
153 | #define Divide(a,b) (a/b) | |
154 | ||
155 | #define INB inb %dx, %al | |
156 | #define OUTB outb %al, %dx | |
157 | #define INL inl %dx, %eax | |
158 | #define OUTL outl %eax, %dx | |
159 | ||
160 | #define data16 .byte 0x66 | |
161 | #define addr16 .byte 0x67 | |
162 | ||
163 | #if !GPROF | |
164 | #define MCOUNT | |
165 | ||
166 | #elif defined(__SHARED__) | |
167 | #define MCOUNT ; .data;\ | |
168 | .align ALIGN;\ | |
169 | LBc(x, 8) .long 0;\ | |
170 | .text;\ | |
171 | Gpush;\ | |
172 | Gload;\ | |
173 | leal Gotoff(LBb(x,8)),%edx;\ | |
174 | Egaddr(%eax,_mcount_ptr);\ | |
175 | Gpop;\ | |
176 | call *(%eax); | |
177 | ||
178 | #else /* !GPROF, !__SHARED__ */ | |
179 | #define MCOUNT ; call mcount; | |
180 | #endif /* GPROF */ | |
181 | ||
182 | #ifdef __ELF__ | |
183 | #define ELF_FUNC(x) .type x,@function | |
184 | #define ELF_DATA(x) .type x,@object | |
185 | #define ELF_SIZE(x,s) .size x,s | |
186 | #else | |
187 | #define ELF_FUNC(x) | |
188 | #define ELF_DATA(x) | |
189 | #define ELF_SIZE(x,s) | |
190 | #endif | |
191 | ||
192 | #define Entry(x) .globl EXT(x); ELF_FUNC(EXT(x)); .align FALIGN; LEXT(x) | |
193 | #define ENTRY(x) Entry(x) MCOUNT | |
194 | #define ENTRY2(x,y) .globl EXT(x); .globl EXT(y); \ | |
195 | ELF_FUNC(EXT(x)); ELF_FUNC(EXT(y)); \ | |
196 | .align FALIGN; LEXT(x); LEXT(y) \ | |
197 | MCOUNT | |
198 | #if __STDC__ | |
199 | #define ASENTRY(x) .globl x; .align FALIGN; x ## : ELF_FUNC(x) MCOUNT | |
200 | #else | |
201 | #define ASENTRY(x) .globl x; .align FALIGN; x: ELF_FUNC(x) MCOUNT | |
202 | #endif /* __STDC__ */ | |
203 | ||
204 | #define DATA(x) .globl EXT(x); ELF_DATA(EXT(x)); .align ALIGN; LEXT(x) | |
205 | ||
206 | #define End(x) ELF_SIZE(x,.-x) | |
207 | #define END(x) End(EXT(x)) | |
208 | #define ENDDATA(x) END(x) | |
209 | #define Enddata(x) End(x) | |
210 | ||
211 | /* | |
212 | * ELF shared library accessor macros. | |
213 | * Gpush saves the %ebx register used for the GOT address | |
214 | * Gpop pops %ebx if we need a GOT | |
215 | * Gload loads %ebx with the GOT address if shared libraries are used | |
216 | * Gcall calls an external function. | |
217 | * Gotoff allows you to reference local labels. | |
218 | * Gotoff2 allows you to reference local labels with an index reg. | |
219 | * Gotoff3 allows you to reference local labels with an index reg & size. | |
220 | * Gaddr loads up a register with an address of an external item. | |
221 | * Gstack is the number of bytes that Gpush pushes on the stack. | |
222 | * | |
223 | * Varients of the above with E or L prefixes do EXT(name) or LCL(name) | |
224 | * respectively. | |
225 | */ | |
226 | ||
227 | #ifndef __SHARED__ | |
228 | #define Gpush | |
229 | #define Gpop | |
230 | #define Gload | |
231 | #define Gcall(func) call func | |
232 | #define Gotoff(lab) lab | |
233 | #define Gotoff2(l,r) l(r) | |
234 | #define Gotoff3(l,r,s) l(,r,s) | |
235 | #define Gaddr(to,lab) movl $lab,to | |
236 | #define Gcmp(lab,reg) cmpl $lab,reg | |
237 | #define Gmemload(lab,reg) movl lab,reg | |
238 | #define Gmemstore(reg,lab,tmp) movl reg,lab | |
239 | #define Gstack 0 | |
240 | ||
241 | #else | |
242 | #ifdef __ELF__ /* ELF shared libraries */ | |
243 | #define Gpush pushl %ebx | |
244 | #define Gpop popl %ebx | |
245 | #define Gload call 9f; 9: popl %ebx; addl $_GLOBAL_OFFSET_TABLE_+[.-9b],%ebx | |
246 | #define Gcall(func) call EXT(func)@PLT | |
247 | #define Gotoff(lab) lab@GOTOFF(%ebx) | |
248 | #define Gotoff2(l,r) l@GOTOFF(%ebx,r) | |
249 | #define Gotoff3(l,r,s) l@GOTOFF(%ebx,r,s) | |
250 | #define Gaddr(to,lab) movl lab@GOT(%ebx),to | |
251 | #define Gcmp(lab,reg) cmpl reg,lab@GOT(%ebx) | |
252 | #define Gmemload(lab,reg) movl lab@GOT(%ebx),reg; movl (reg),reg | |
253 | #define Gmemstore(reg,lab,tmp) movl lab@GOT(%ebx),tmp; movl reg,(tmp) | |
254 | #define Gstack 4 | |
255 | ||
256 | #else /* ROSE shared libraries */ | |
257 | #define Gpush | |
258 | #define Gpop | |
259 | #define Gload | |
260 | #define Gcall(func) call *9f; .data; .align ALIGN; 9: .long func; .text | |
261 | #define Gotoff(lab) lab | |
262 | #define Gotoff2(l,r) l(r) | |
263 | #define Gotoff3(l,r,s) l(,r,s) | |
264 | #define Gaddr(to,lab) movl 9f,to; .data; .align ALIGN; 9: .long lab; .text | |
265 | #define Gcmp(lab,reg) cmpl reg,9f; .data; .align ALIGN; 9: .long lab; .text | |
266 | #define Gmemload(lab,reg) movl 9f,reg; movl (reg),reg; .data; .align ALIGN; 9: .long lab; .text | |
267 | #define Gmemstore(reg,lab,tmp) movl 9f,tmp; movl reg,(tmp); .data; .align ALIGN; 9: .long lab; .text | |
268 | #define Gstack 0 | |
269 | #endif /* __ELF__ */ | |
270 | #endif /* __SHARED__ */ | |
271 | ||
272 | /* Egotoff is not provided, since external symbols should not use @GOTOFF | |
273 | relocations. */ | |
274 | #define Egcall(func) Gcall(EXT(func)) | |
275 | #define Egaddr(to,lab) Gaddr(to,EXT(lab)) | |
276 | #define Egcmp(lab,reg) Gcmp(EXT(lab),reg) | |
277 | #define Egmemload(lab,reg) Gmemload(EXT(lab),reg) | |
278 | #define Egmemstore(reg,lab,tmp) Gmemstore(reg,EXT(lab),tmp) | |
279 | ||
280 | #define Lgotoff(lab) Gotoff(LCL(lab)) | |
281 | #define Lgotoff2(l,r) Gotoff2(LCL(l),r) | |
282 | #define Lgotoff3(l,r,s) Gotoff3(LCL(l),r,s) | |
283 | #define Lgcmp(lab,reg) Gcmp(LCL(lab),reg) | |
284 | #define Lgmemload(lab,reg) movl Lgotoff(lab),reg | |
285 | #define Lgmemstore(reg,lab,tmp) movl reg,Lgotoff(lab) | |
286 | ||
287 | #ifdef ASSEMBLER | |
288 | #if MACH_KDB | |
289 | #include <ddb/stab.h> | |
290 | /* | |
291 | * This pseudo-assembler line is added so that there will be at least | |
292 | * one N_SO entry in the symbol stable to define the current file name. | |
293 | */ | |
294 | #endif /* MACH_KDB */ | |
295 | ||
296 | #else /* NOT ASSEMBLER */ | |
297 | ||
298 | /* These defines are here for .c files that wish to reference global symbols | |
299 | * within __asm__ statements. | |
300 | */ | |
301 | #ifndef __NO_UNDERSCORES__ | |
302 | #define CC_SYM_PREFIX "_" | |
303 | #else | |
304 | #define CC_SYM_PREFIX "" | |
305 | #endif /* __NO_UNDERSCORES__ */ | |
306 | #endif /* ASSEMBLER */ | |
307 | ||
308 | /* | |
309 | * The following macros make calls into C code. | |
310 | * They dynamically align the stack to 16 bytes. | |
311 | */ | |
312 | #if defined(__i386__) | |
313 | /* | |
314 | * Arguments are moved (not pushed) onto the correctly aligned stack. | |
315 | * NOTE: ESI is destroyed in the process, and hence cannot | |
316 | * be directly used as a parameter. Users of this macro must | |
317 | * independently preserve ESI (a non-volatile) if the routine is | |
318 | * intended to be called from C, for instance. | |
319 | */ | |
320 | ||
321 | #define CCALL(fn) \ | |
322 | movl %esp, %esi ;\ | |
323 | andl $0xFFFFFFF0, %esp ;\ | |
324 | call EXT(fn) ;\ | |
325 | movl %esi, %esp | |
326 | ||
327 | #define CCALL1(fn, arg1) \ | |
328 | movl %esp, %esi ;\ | |
329 | subl $4, %esp ;\ | |
330 | andl $0xFFFFFFF0, %esp ;\ | |
331 | movl arg1, (%esp) ;\ | |
332 | call EXT(fn) ;\ | |
333 | movl %esi, %esp | |
334 | ||
335 | #define CCALL2(fn, arg1, arg2) \ | |
336 | movl %esp, %esi ;\ | |
337 | subl $8, %esp ;\ | |
338 | andl $0xFFFFFFF0, %esp ;\ | |
339 | movl arg2, 4(%esp) ;\ | |
340 | movl arg1, (%esp) ;\ | |
341 | call EXT(fn) ;\ | |
342 | movl %esi, %esp | |
343 | ||
344 | /* This variant exists to permit adjustment of the stack by "dtrace" */ | |
345 | #define CCALL1WITHSP(fn, arg1) \ | |
346 | movl %esp, %esi ;\ | |
347 | subl $12, %esp ;\ | |
348 | andl $0xFFFFFFF0, %esp ;\ | |
349 | movl %esi, 8(%esp) ;\ | |
350 | leal 8(%esp), %esi ;\ | |
351 | movl %esi, 4(%esp) ;\ | |
352 | movl arg1, (%esp) ;\ | |
353 | call EXT(fn) ;\ | |
354 | movl 8(%esp), %esp | |
355 | ||
356 | /* | |
357 | * CCALL5 is used for callee functions with 3 arguments but | |
358 | * where arg2 (a3:a2) and arg3 (a5:a4) are 64-bit values. | |
359 | */ | |
360 | #define CCALL5(fn, a1, a2, a3, a4, a5) \ | |
361 | movl %esp, %esi ;\ | |
362 | subl $20, %esp ;\ | |
363 | andl $0xFFFFFFF0, %esp ;\ | |
364 | movl a5, 16(%esp) ;\ | |
365 | movl a4, 12(%esp) ;\ | |
366 | movl a3, 8(%esp) ;\ | |
367 | movl a2, 4(%esp) ;\ | |
368 | movl a1, (%esp) ;\ | |
369 | call EXT(fn) ;\ | |
370 | movl %esi, %esp | |
371 | ||
372 | #elif defined(__x86_64__) | |
373 | ||
374 | /* This variant exists to permit adjustment of the stack by "dtrace" */ | |
375 | #define CCALLWITHSP(fn) \ | |
376 | mov %rsp, %r12 ;\ | |
377 | sub $8, %rsp ;\ | |
378 | and $0xFFFFFFFFFFFFFFF0, %rsp ;\ | |
379 | mov %r12, (%rsp) ;\ | |
380 | leaq (%rsp), %rsi ;\ | |
381 | call EXT(fn) ;\ | |
382 | mov (%rsp), %rsp | |
383 | ||
384 | #define CCALL(fn) \ | |
385 | mov %rsp, %r12 ;\ | |
386 | and $0xFFFFFFFFFFFFFFF0, %rsp ;\ | |
387 | call EXT(fn) ;\ | |
388 | mov %r12, %rsp | |
389 | ||
390 | #define CCALL1(fn, arg1) \ | |
391 | mov arg1, %rdi ;\ | |
392 | CCALL(fn) | |
393 | ||
394 | #define CCALL2(fn, arg1, arg2) \ | |
395 | mov arg1, %rdi ;\ | |
396 | CCALL(fn) | |
397 | ||
398 | #define CCALL3(fn, arg1, arg2, arg3) \ | |
399 | mov arg1, %rdi ;\ | |
400 | mov arg2, %rsi ;\ | |
401 | mov arg3, %rdx ;\ | |
402 | CCALL(fn) | |
403 | ||
404 | #else | |
405 | #error unsupported architecture | |
406 | #endif | |
407 | ||
408 | #endif /* _I386_ASM_H_ */ |