1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #ifndef _IA32_SYS_ASM_LINKAGE_H
28 #define _IA32_SYS_ASM_LINKAGE_H
29
30 #pragma ident "%Z%%M% %I% %E% SMI"
31
32 #include <sys/stack.h>
33 #include <sys/trap.h>
34
35 #ifdef __cplusplus
36 extern "C" {
37 #endif
38
39 #ifdef _ASM /* The remainder of this file is only for assembly files */
40
41 /*
42 * make annoying differences in assembler syntax go away
43 */
44
45 /*
46 * D16 and A16 are used to insert instructions prefixes; the
47 * macros help the assembler code be slightly more portable.
48 */
49 #if !defined(__GNUC_AS__)
50 /*
51 * /usr/ccs/bin/as prefixes are parsed as separate instructions
52 */
53 #define D16 data16;
54 #define A16 addr16;
55
56 /*
57 * (There are some weird constructs in constant expressions)
58 */
59 #define _CONST(const) [const]
60 #define _BITNOT(const) -1!_CONST(const)
61 #define _MUL(a, b) _CONST(a \* b)
62
63 #else
64 /*
65 * Why not use the 'data16' and 'addr16' prefixes .. well, the
66 * assembler doesn't quite believe in real mode, and thus argues with
67 * us about what we're trying to do.
68 */
69 #define D16 .byte 0x66;
70 #define A16 .byte 0x67;
71
72 #define _CONST(const) (const)
73 #define _BITNOT(const) ~_CONST(const)
74 #define _MUL(a, b) _CONST(a * b)
75
76 #endif
77
78 /*
79 * C pointers are different sizes between i386 and amd64.
80 * These constants can be used to compute offsets into pointer arrays.
81 */
82 #if defined(__amd64)
83 #define CLONGSHIFT 3
84 #define CLONGSIZE 8
85 #define CLONGMASK 7
86 #elif defined(__i386)
87 #define CLONGSHIFT 2
88 #define CLONGSIZE 4
89 #define CLONGMASK 3
90 #endif
91
92 /*
93 * Since we know we're either ILP32 or LP64 ..
94 */
95 #define CPTRSHIFT CLONGSHIFT
96 #define CPTRSIZE CLONGSIZE
97 #define CPTRMASK CLONGMASK
98
99 #if CPTRSIZE != (1 << CPTRSHIFT) || CLONGSIZE != (1 << CLONGSHIFT)
100 #error "inconsistent shift constants"
101 #endif
102
103 #if CPTRMASK != (CPTRSIZE - 1) || CLONGMASK != (CLONGSIZE - 1)
104 #error "inconsistent mask constants"
105 #endif
106
107 #define ASM_ENTRY_ALIGN 16
108
109 /*
110 * SSE register alignment and save areas
111 */
112
113 #define XMM_SIZE 16
114 #define XMM_ALIGN 16
115
116 #if defined(__amd64)
117
118 #define SAVE_XMM_PROLOG(sreg, nreg) \
119 subq $_CONST(_MUL(XMM_SIZE, nreg)), %rsp; \
120 movq %rsp, sreg
121
122 #define RSTOR_XMM_EPILOG(sreg, nreg) \
123 addq $_CONST(_MUL(XMM_SIZE, nreg)), %rsp
124
125 #elif defined(__i386)
126
127 #define SAVE_XMM_PROLOG(sreg, nreg) \
128 subl $_CONST(_MUL(XMM_SIZE, nreg) + XMM_ALIGN), %esp; \
129 movl %esp, sreg; \
130 addl $XMM_ALIGN, sreg; \
131 andl $_BITNOT(XMM_ALIGN-1), sreg
132
133 #define RSTOR_XMM_EPILOG(sreg, nreg) \
134 addl $_CONST(_MUL(XMM_SIZE, nreg) + XMM_ALIGN), %esp;
135
136 #endif /* __i386 */
137
138 /*
139 * profiling causes definitions of the MCOUNT and RTMCOUNT
140 * particular to the type
141 */
142 #ifdef GPROF
143
144 #define MCOUNT(x) \
145 pushl %ebp; \
146 movl %esp, %ebp; \
147 call _mcount; \
148 popl %ebp
149
150 #endif /* GPROF */
151
152 #ifdef PROF
153
154 #define MCOUNT(x) \
155 /* CSTYLED */ \
156 .lcomm .L_/**/x/**/1, 4, 4; \
157 pushl %ebp; \
158 movl %esp, %ebp; \
159 /* CSTYLED */ \
160 movl $.L_/**/x/**/1, %edx; \
161 call _mcount; \
162 popl %ebp
163
164 #endif /* PROF */
165
166 /*
167 * if we are not profiling, MCOUNT should be defined to nothing
168 */
169 #if !defined(PROF) && !defined(GPROF)
170 #define MCOUNT(x)
171 #endif /* !defined(PROF) && !defined(GPROF) */
172
173 #define RTMCOUNT(x) MCOUNT(x)
174
175 /*
176 * Macro to define weak symbol aliases. These are similar to the ANSI-C
177 * #pragma weak _name = name
178 * except a compiler can determine type. The assembler must be told. Hence,
179 * the second parameter must be the type of the symbol (i.e.: function,...)
180 */
181 #define ANSI_PRAGMA_WEAK(sym, stype) \
182 /* CSTYLED */ \
183 .weak _/**/sym; \
184 /* CSTYLED */ \
185 .type _/**/sym, @stype; \
186 /* CSTYLED */ \
187 _/**/sym = sym
188
189 /*
190 * Like ANSI_PRAGMA_WEAK(), but for unrelated names, as in:
191 * #pragma weak sym1 = sym2
192 */
193 #define ANSI_PRAGMA_WEAK2(sym1, sym2, stype) \
194 .weak sym1; \
195 .type sym1, @stype; \
196 sym1 = sym2
197
198 /*
199 * ENTRY provides the standard procedure entry code and an easy way to
200 * insert the calls to mcount for profiling. ENTRY_NP is identical, but
201 * never calls mcount.
202 */
203 #define ENTRY(x) \
204 .text; \
205 .align ASM_ENTRY_ALIGN; \
206 .globl x; \
207 .type x, @function; \
208 x: MCOUNT(x)
209
210 #define ENTRY_NP(x) \
211 .text; \
212 .align ASM_ENTRY_ALIGN; \
213 .globl x; \
214 .type x, @function; \
215 x:
216
217 #define RTENTRY(x) \
218 .text; \
219 .align ASM_ENTRY_ALIGN; \
220 .globl x; \
221 .type x, @function; \
222 x: RTMCOUNT(x)
223
224 /*
225 * ENTRY2 is identical to ENTRY but provides two labels for the entry point.
226 */
227 #define ENTRY2(x, y) \
228 .text; \
229 .align ASM_ENTRY_ALIGN; \
230 .globl x, y; \
231 .type x, @function; \
232 .type y, @function; \
233 /* CSTYLED */ \
234 x: ; \
235 y: MCOUNT(x)
236
237 #define ENTRY_NP2(x, y) \
238 .text; \
239 .align ASM_ENTRY_ALIGN; \
240 .globl x, y; \
241 .type x, @function; \
242 .type y, @function; \
243 /* CSTYLED */ \
244 x: ; \
245 y:
246
247
248 /*
249 * ALTENTRY provides for additional entry points.
250 */
251 #define ALTENTRY(x) \
252 .globl x; \
253 .type x, @function; \
254 x:
255
256 /*
257 * DGDEF and DGDEF2 provide global data declarations.
258 *
259 * DGDEF provides a word aligned word of storage.
260 *
261 * DGDEF2 allocates "sz" bytes of storage with **NO** alignment. This
262 * implies this macro is best used for byte arrays.
263 *
264 * DGDEF3 allocates "sz" bytes of storage with "algn" alignment.
265 */
266 #define DGDEF2(name, sz) \
267 .data; \
268 .globl name; \
269 .type name, @object; \
270 .size name, sz; \
271 name:
272
273 #define DGDEF3(name, sz, algn) \
274 .data; \
275 .align algn; \
276 .globl name; \
277 .type name, @object; \
278 .size name, sz; \
279 name:
280
281 #define DGDEF(name) DGDEF3(name, 4, 4)
282
283 /*
284 * SET_SIZE trails a function and set the size for the ELF symbol table.
285 */
286 #define SET_SIZE(x) \
287 .size x, [.-x]
288
289 /*
290 * NWORD provides native word value.
291 */
292 #if defined(__amd64)
293
294 /*CSTYLED*/
295 #define NWORD quad
296
297 #elif defined(__i386)
298
299 #define NWORD long
300
301 #endif /* __i386 */
302
303 #endif /* _ASM */
304
305 #ifdef __cplusplus
306 }
307 #endif
308
309 #endif /* _IA32_SYS_ASM_LINKAGE_H */