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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /*
23: * @OSF_COPYRIGHT@
24: */
25: /*
26: * Mach Operating System
27: * Copyright (c) 1991,1990,1989 Carnegie Mellon University
28: * All Rights Reserved.
29: *
30: * Permission to use, copy, modify and distribute this software and its
31: * documentation is hereby granted, provided that both the copyright
32: * notice and this permission notice appear in all copies of the
33: * software, derivative works or modified versions, and any portions
34: * thereof, and that both notices appear in supporting documentation.
35: *
36: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
37: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
38: * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
39: *
40: * Carnegie Mellon requests users of this software to return to
41: *
42: * Software Distribution Coordinator or [email protected]
43: * School of Computer Science
44: * Carnegie Mellon University
45: * Pittsburgh PA 15213-3890
46: *
47: * any improvements or extensions that they make and grant Carnegie Mellon
48: * the rights to redistribute these changes.
49: */
50:
51: #ifndef _I386_ASM_H_
52: #define _I386_ASM_H_
53:
54: #ifdef _KERNEL
55: #include <gprof.h>
56: #endif /* _KERNEL */
57:
58: #ifdef MACH_KERNEL
59: #include <mach_kdb.h>
60: #else /* !MACH_KERNEL */
61: #define MACH_KDB 0
62: #endif /* !MACH_KERNEL */
63:
64:
65: #if defined(MACH_KERNEL) || defined(_KERNEL)
66: #include <gprof.h>
67: #endif /* MACH_KERNEL || _KERNEL */
68:
69:
70: #define S_ARG0 4(%esp)
71: #define S_ARG1 8(%esp)
72: #define S_ARG2 12(%esp)
73: #define S_ARG3 16(%esp)
74:
75: #define FRAME pushl %ebp; movl %esp, %ebp
76: #define EMARF leave
77:
78: #define B_ARG0 8(%ebp)
79: #define B_ARG1 12(%ebp)
80: #define B_ARG2 16(%ebp)
81: #define B_ARG3 20(%ebp)
82:
83: /* There is another definition of ALIGN for .c sources */
84: #ifdef ASSEMBLER
85: #define ALIGN 2
86: #endif /* ASSEMBLER */
87:
88: #ifndef FALIGN
89: #define FALIGN ALIGN
90: #endif
91:
92: #define LB(x,n) n
93: #if __STDC__
94: #ifndef __NO_UNDERSCORES__
95: #define LCL(x) L ## x
96: #define EXT(x) _ ## x
97: #define LEXT(x) _ ## x ## :
98: #else
99: #define LCL(x) .L ## x
100: #define EXT(x) x
101: #define LEXT(x) x ## :
102: #endif
103: #define LBc(x,n) n ## :
104: #define LBb(x,n) n ## b
105: #define LBf(x,n) n ## f
106: #else /* __STDC__ */
107: #ifndef __NO_UNDERSCORES__
108: #define LCL(x) L/**/x
109: #define EXT(x) _/**/x
110: #define LEXT(x) _/**/x/**/:
111: #else /* __NO_UNDERSCORES__ */
112: #define LCL(x) .L/**/x
113: #define EXT(x) x
114: #define LEXT(x) x/**/:
115: #endif /* __NO_UNDERSCORES__ */
116: #define LBc(x,n) n/**/:
117: #define LBb(x,n) n/**/b
118: #define LBf(x,n) n/**/f
119: #endif /* __STDC__ */
120:
121: #define SVC .byte 0x9a; .long 0; .word 0x7
122:
123: #define RPC_SVC .byte 0x9a; .long 0; .word 0xf
124:
125: #define String .asciz
126: #define Value .word
127: #define Times(a,b) (a*b)
128: #define Divide(a,b) (a/b)
129:
130: #define INB inb %dx, %al
131: #define OUTB outb %al, %dx
132: #define INL inl %dx, %eax
133: #define OUTL outl %eax, %dx
134:
135: #define data16 .byte 0x66
136: #define addr16 .byte 0x67
137:
138: #if !GPROF
139: #define MCOUNT
140:
141: #elif defined(__SHARED__)
142: #define MCOUNT ; .data;\
143: .align ALIGN;\
144: LBc(x, 8) .long 0;\
145: .text;\
146: Gpush;\
147: Gload;\
148: leal Gotoff(LBb(x,8)),%edx;\
149: Egaddr(%eax,_mcount_ptr);\
150: Gpop;\
151: call *(%eax);
152:
153: #else /* !GPROF, !__SHARED__ */
154: #define MCOUNT ; .data;\
155: .align ALIGN;\
156: LBc(x, 8) .long 0;\
157: .text;\
158: movl $LBb(x,8),%edx;\
159: call *EXT(_mcount_ptr);
160:
161: #endif /* GPROF */
162:
163: #ifdef __ELF__
164: #define ELF_FUNC(x) .type x,@function
165: #define ELF_DATA(x) .type x,@object
166: #define ELF_SIZE(x,s) .size x,s
167: #else
168: #define ELF_FUNC(x)
169: #define ELF_DATA(x)
170: #define ELF_SIZE(x,s)
171: #endif
172:
173: #define Entry(x) .globl EXT(x); ELF_FUNC(EXT(x)); .align FALIGN; LEXT(x)
174: #define ENTRY(x) Entry(x) MCOUNT
175: #define ENTRY2(x,y) .globl EXT(x); .globl EXT(y); \
176: ELF_FUNC(EXT(x)); ELF_FUNC(EXT(y)); \
177: .align FALIGN; LEXT(x); LEXT(y) \
178: MCOUNT
179: #if __STDC__
180: #define ASENTRY(x) .globl x; .align FALIGN; x ## : ELF_FUNC(x) MCOUNT
181: #else
182: #define ASENTRY(x) .globl x; .align FALIGN; x: ELF_FUNC(x) MCOUNT
183: #endif /* __STDC__ */
184:
185: #define DATA(x) .globl EXT(x); ELF_DATA(EXT(x)); .align ALIGN; LEXT(x)
186:
187: #define End(x) ELF_SIZE(x,.-x)
188: #define END(x) End(EXT(x))
189: #define ENDDATA(x) END(x)
190: #define Enddata(x) End(x)
191:
192: /*
193: * ELF shared library accessor macros.
194: * Gpush saves the %ebx register used for the GOT address
195: * Gpop pops %ebx if we need a GOT
196: * Gload loads %ebx with the GOT address if shared libraries are used
197: * Gcall calls an external function.
198: * Gotoff allows you to reference local labels.
199: * Gotoff2 allows you to reference local labels with an index reg.
200: * Gotoff3 allows you to reference local labels with an index reg & size.
201: * Gaddr loads up a register with an address of an external item.
202: * Gstack is the number of bytes that Gpush pushes on the stack.
203: *
204: * Varients of the above with E or L prefixes do EXT(name) or LCL(name)
205: * respectively.
206: */
207:
208: #ifndef __SHARED__
209: #define Gpush
210: #define Gpop
211: #define Gload
212: #define Gcall(func) call func
213: #define Gotoff(lab) lab
214: #define Gotoff2(l,r) l(r)
215: #define Gotoff3(l,r,s) l(,r,s)
216: #define Gaddr(to,lab) movl $lab,to
217: #define Gcmp(lab,reg) cmpl $lab,reg
218: #define Gmemload(lab,reg) movl lab,reg
219: #define Gmemstore(reg,lab,tmp) movl reg,lab
220: #define Gstack 0
221:
222: #else
223: #ifdef __ELF__ /* ELF shared libraries */
224: #define Gpush pushl %ebx
225: #define Gpop popl %ebx
226: #define Gload call 9f; 9: popl %ebx; addl $_GLOBAL_OFFSET_TABLE_+[.-9b],%ebx
227: #define Gcall(func) call EXT(func)@PLT
228: #define Gotoff(lab) lab@GOTOFF(%ebx)
229: #define Gotoff2(l,r) l@GOTOFF(%ebx,r)
230: #define Gotoff3(l,r,s) l@GOTOFF(%ebx,r,s)
231: #define Gaddr(to,lab) movl lab@GOT(%ebx),to
232: #define Gcmp(lab,reg) cmpl reg,lab@GOT(%ebx)
233: #define Gmemload(lab,reg) movl lab@GOT(%ebx),reg; movl (reg),reg
234: #define Gmemstore(reg,lab,tmp) movl lab@GOT(%ebx),tmp; movl reg,(tmp)
235: #define Gstack 4
236:
237: #else /* ROSE shared libraries */
238: #define Gpush
239: #define Gpop
240: #define Gload
241: #define Gcall(func) call *9f; .data; .align ALIGN; 9: .long func; .text
242: #define Gotoff(lab) lab
243: #define Gotoff2(l,r) l(r)
244: #define Gotoff3(l,r,s) l(,r,s)
245: #define Gaddr(to,lab) movl 9f,to; .data; .align ALIGN; 9: .long lab; .text
246: #define Gcmp(lab,reg) cmpl reg,9f; .data; .align ALIGN; 9: .long lab; .text
247: #define Gmemload(lab,reg) movl 9f,reg; movl (reg),reg; .data; .align ALIGN; 9: .long lab; .text
248: #define Gmemstore(reg,lab,tmp) movl 9f,tmp; movl reg,(tmp); .data; .align ALIGN; 9: .long lab; .text
249: #define Gstack 0
250: #endif /* __ELF__ */
251: #endif /* __SHARED__ */
252:
253: /* Egotoff is not provided, since external symbols should not use @GOTOFF
254: relocations. */
255: #define Egcall(func) Gcall(EXT(func))
256: #define Egaddr(to,lab) Gaddr(to,EXT(lab))
257: #define Egcmp(lab,reg) Gcmp(EXT(lab),reg)
258: #define Egmemload(lab,reg) Gmemload(EXT(lab),reg)
259: #define Egmemstore(reg,lab,tmp) Gmemstore(reg,EXT(lab),tmp)
260:
261: #define Lgotoff(lab) Gotoff(LCL(lab))
262: #define Lgotoff2(l,r) Gotoff2(LCL(l),r)
263: #define Lgotoff3(l,r,s) Gotoff3(LCL(l),r,s)
264: #define Lgcmp(lab,reg) Gcmp(LCL(lab),reg)
265: #define Lgmemload(lab,reg) movl Lgotoff(lab),reg
266: #define Lgmemstore(reg,lab,tmp) movl reg,Lgotoff(lab)
267:
268: #ifdef ASSEMBLER
269: #if MACH_KDB
270: #include <ddb/stab.h>
271: /*
272: * This pseudo-assembler line is added so that there will be at least
273: * one N_SO entry in the symbol stable to define the current file name.
274: */
275: #endif /* MACH_KDB */
276:
277: #else /* NOT ASSEMBLER */
278:
279: /* These defines are here for .c files that wish to reference global symbols
280: * within __asm__ statements.
281: */
282: #ifndef __NO_UNDERSCORES__
283: #define CC_SYM_PREFIX "_"
284: #else
285: #define CC_SYM_PREFIX ""
286: #endif /* __NO_UNDERSCORES__ */
287: #endif /* ASSEMBLER */
288:
289: #endif /* _I386_ASM_H_ */
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