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gerrit.opencord.org / voltha-go / d948f7701638cccadb9a514f722927f8131b0a46 / . / vendor / golang.org / x / sys / unix / asm_zos_s390x.s
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khenaidood948f772021-08-11 17:49:24 -0400[diff] [blame^]1// Copyright 2020 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5//go:build zos && s390x && gc
6// +build zos
7// +build s390x
8// +build gc
9
10#include "textflag.h"
11
12#define PSALAA 1208(R0)
13#define GTAB64(x) 80(x)
14#define LCA64(x) 88(x)
15#define CAA(x) 8(x)
16#define EDCHPXV(x) 1016(x) // in the CAA
17#define SAVSTACK_ASYNC(x) 336(x) // in the LCA
18
19// SS_*, where x=SAVSTACK_ASYNC
20#define SS_LE(x) 0(x)
21#define SS_GO(x) 8(x)
22#define SS_ERRNO(x) 16(x)
23#define SS_ERRNOJR(x) 20(x)
24
25#define LE_CALL BYTE $0x0D; BYTE $0x76; // BL R7, R6
26
27TEXT ·clearErrno(SB),NOSPLIT,$0-0
28 BL addrerrno<>(SB)
29 MOVD $0, 0(R3)
30 RET
31
32// Returns the address of errno in R3.
33TEXT addrerrno<>(SB),NOSPLIT|NOFRAME,$0-0
34 // Get library control area (LCA).
35 MOVW PSALAA, R8
36 MOVD LCA64(R8), R8
37
38 // Get __errno FuncDesc.
39 MOVD CAA(R8), R9
40 MOVD EDCHPXV(R9), R9
41 ADD $(0x156*16), R9
42 LMG 0(R9), R5, R6
43
44 // Switch to saved LE stack.
45 MOVD SAVSTACK_ASYNC(R8), R9
46 MOVD 0(R9), R4
47 MOVD $0, 0(R9)
48
49 // Call __errno function.
50 LE_CALL
51 NOPH
52
53 // Switch back to Go stack.
54 XOR R0, R0 // Restore R0 to $0.
55 MOVD R4, 0(R9) // Save stack pointer.
56 RET
57
58TEXT ·syscall_syscall(SB),NOSPLIT,$0-56
59 BL runtime·entersyscall(SB)
60 MOVD a1+8(FP), R1
61 MOVD a2+16(FP), R2
62 MOVD a3+24(FP), R3
63
64 // Get library control area (LCA).
65 MOVW PSALAA, R8
66 MOVD LCA64(R8), R8
67
68 // Get function.
69 MOVD CAA(R8), R9
70 MOVD EDCHPXV(R9), R9
71 MOVD trap+0(FP), R5
72 SLD $4, R5
73 ADD R5, R9
74 LMG 0(R9), R5, R6
75
76 // Restore LE stack.
77 MOVD SAVSTACK_ASYNC(R8), R9
78 MOVD 0(R9), R4
79 MOVD $0, 0(R9)
80
81 // Call function.
82 LE_CALL
83 NOPH
84 XOR R0, R0 // Restore R0 to $0.
85 MOVD R4, 0(R9) // Save stack pointer.
86
87 MOVD R3, r1+32(FP)
88 MOVD R0, r2+40(FP)
89 MOVD R0, err+48(FP)
90 MOVW R3, R4
91 CMP R4, $-1
92 BNE done
93 BL addrerrno<>(SB)
94 MOVWZ 0(R3), R3
95 MOVD R3, err+48(FP)
96done:
97 BL runtime·exitsyscall(SB)
98 RET
99
100TEXT ·syscall_rawsyscall(SB),NOSPLIT,$0-56
101 MOVD a1+8(FP), R1
102 MOVD a2+16(FP), R2
103 MOVD a3+24(FP), R3
104
105 // Get library control area (LCA).
106 MOVW PSALAA, R8
107 MOVD LCA64(R8), R8
108
109 // Get function.
110 MOVD CAA(R8), R9
111 MOVD EDCHPXV(R9), R9
112 MOVD trap+0(FP), R5
113 SLD $4, R5
114 ADD R5, R9
115 LMG 0(R9), R5, R6
116
117 // Restore LE stack.
118 MOVD SAVSTACK_ASYNC(R8), R9
119 MOVD 0(R9), R4
120 MOVD $0, 0(R9)
121
122 // Call function.
123 LE_CALL
124 NOPH
125 XOR R0, R0 // Restore R0 to $0.
126 MOVD R4, 0(R9) // Save stack pointer.
127
128 MOVD R3, r1+32(FP)
129 MOVD R0, r2+40(FP)
130 MOVD R0, err+48(FP)
131 MOVW R3, R4
132 CMP R4, $-1
133 BNE done
134 BL addrerrno<>(SB)
135 MOVWZ 0(R3), R3
136 MOVD R3, err+48(FP)
137done:
138 RET
139
140TEXT ·syscall_syscall6(SB),NOSPLIT,$0-80
141 BL runtime·entersyscall(SB)
142 MOVD a1+8(FP), R1
143 MOVD a2+16(FP), R2
144 MOVD a3+24(FP), R3
145
146 // Get library control area (LCA).
147 MOVW PSALAA, R8
148 MOVD LCA64(R8), R8
149
150 // Get function.
151 MOVD CAA(R8), R9
152 MOVD EDCHPXV(R9), R9
153 MOVD trap+0(FP), R5
154 SLD $4, R5
155 ADD R5, R9
156 LMG 0(R9), R5, R6
157
158 // Restore LE stack.
159 MOVD SAVSTACK_ASYNC(R8), R9
160 MOVD 0(R9), R4
161 MOVD $0, 0(R9)
162
163 // Fill in parameter list.
164 MOVD a4+32(FP), R12
165 MOVD R12, (2176+24)(R4)
166 MOVD a5+40(FP), R12
167 MOVD R12, (2176+32)(R4)
168 MOVD a6+48(FP), R12
169 MOVD R12, (2176+40)(R4)
170
171 // Call function.
172 LE_CALL
173 NOPH
174 XOR R0, R0 // Restore R0 to $0.
175 MOVD R4, 0(R9) // Save stack pointer.
176
177 MOVD R3, r1+56(FP)
178 MOVD R0, r2+64(FP)
179 MOVD R0, err+72(FP)
180 MOVW R3, R4
181 CMP R4, $-1
182 BNE done
183 BL addrerrno<>(SB)
184 MOVWZ 0(R3), R3
185 MOVD R3, err+72(FP)
186done:
187 BL runtime·exitsyscall(SB)
188 RET
189
190TEXT ·syscall_rawsyscall6(SB),NOSPLIT,$0-80
191 MOVD a1+8(FP), R1
192 MOVD a2+16(FP), R2
193 MOVD a3+24(FP), R3
194
195 // Get library control area (LCA).
196 MOVW PSALAA, R8
197 MOVD LCA64(R8), R8
198
199 // Get function.
200 MOVD CAA(R8), R9
201 MOVD EDCHPXV(R9), R9
202 MOVD trap+0(FP), R5
203 SLD $4, R5
204 ADD R5, R9
205 LMG 0(R9), R5, R6
206
207 // Restore LE stack.
208 MOVD SAVSTACK_ASYNC(R8), R9
209 MOVD 0(R9), R4
210 MOVD $0, 0(R9)
211
212 // Fill in parameter list.
213 MOVD a4+32(FP), R12
214 MOVD R12, (2176+24)(R4)
215 MOVD a5+40(FP), R12
216 MOVD R12, (2176+32)(R4)
217 MOVD a6+48(FP), R12
218 MOVD R12, (2176+40)(R4)
219
220 // Call function.
221 LE_CALL
222 NOPH
223 XOR R0, R0 // Restore R0 to $0.
224 MOVD R4, 0(R9) // Save stack pointer.
225
226 MOVD R3, r1+56(FP)
227 MOVD R0, r2+64(FP)
228 MOVD R0, err+72(FP)
229 MOVW R3, R4
230 CMP R4, $-1
231 BNE done
232 BL ·rrno<>(SB)
233 MOVWZ 0(R3), R3
234 MOVD R3, err+72(FP)
235done:
236 RET
237
238TEXT ·syscall_syscall9(SB),NOSPLIT,$0
239 BL runtime·entersyscall(SB)
240 MOVD a1+8(FP), R1
241 MOVD a2+16(FP), R2
242 MOVD a3+24(FP), R3
243
244 // Get library control area (LCA).
245 MOVW PSALAA, R8
246 MOVD LCA64(R8), R8
247
248 // Get function.
249 MOVD CAA(R8), R9
250 MOVD EDCHPXV(R9), R9
251 MOVD trap+0(FP), R5
252 SLD $4, R5
253 ADD R5, R9
254 LMG 0(R9), R5, R6
255
256 // Restore LE stack.
257 MOVD SAVSTACK_ASYNC(R8), R9
258 MOVD 0(R9), R4
259 MOVD $0, 0(R9)
260
261 // Fill in parameter list.
262 MOVD a4+32(FP), R12
263 MOVD R12, (2176+24)(R4)
264 MOVD a5+40(FP), R12
265 MOVD R12, (2176+32)(R4)
266 MOVD a6+48(FP), R12
267 MOVD R12, (2176+40)(R4)
268 MOVD a7+56(FP), R12
269 MOVD R12, (2176+48)(R4)
270 MOVD a8+64(FP), R12
271 MOVD R12, (2176+56)(R4)
272 MOVD a9+72(FP), R12
273 MOVD R12, (2176+64)(R4)
274
275 // Call function.
276 LE_CALL
277 NOPH
278 XOR R0, R0 // Restore R0 to $0.
279 MOVD R4, 0(R9) // Save stack pointer.
280
281 MOVD R3, r1+80(FP)
282 MOVD R0, r2+88(FP)
283 MOVD R0, err+96(FP)
284 MOVW R3, R4
285 CMP R4, $-1
286 BNE done
287 BL addrerrno<>(SB)
288 MOVWZ 0(R3), R3
289 MOVD R3, err+96(FP)
290done:
291 BL runtime·exitsyscall(SB)
292 RET
293
294TEXT ·syscall_rawsyscall9(SB),NOSPLIT,$0
295 MOVD a1+8(FP), R1
296 MOVD a2+16(FP), R2
297 MOVD a3+24(FP), R3
298
299 // Get library control area (LCA).
300 MOVW PSALAA, R8
301 MOVD LCA64(R8), R8
302
303 // Get function.
304 MOVD CAA(R8), R9
305 MOVD EDCHPXV(R9), R9
306 MOVD trap+0(FP), R5
307 SLD $4, R5
308 ADD R5, R9
309 LMG 0(R9), R5, R6
310
311 // Restore LE stack.
312 MOVD SAVSTACK_ASYNC(R8), R9
313 MOVD 0(R9), R4
314 MOVD $0, 0(R9)
315
316 // Fill in parameter list.
317 MOVD a4+32(FP), R12
318 MOVD R12, (2176+24)(R4)
319 MOVD a5+40(FP), R12
320 MOVD R12, (2176+32)(R4)
321 MOVD a6+48(FP), R12
322 MOVD R12, (2176+40)(R4)
323 MOVD a7+56(FP), R12
324 MOVD R12, (2176+48)(R4)
325 MOVD a8+64(FP), R12
326 MOVD R12, (2176+56)(R4)
327 MOVD a9+72(FP), R12
328 MOVD R12, (2176+64)(R4)
329
330 // Call function.
331 LE_CALL
332 NOPH
333 XOR R0, R0 // Restore R0 to $0.
334 MOVD R4, 0(R9) // Save stack pointer.
335
336 MOVD R3, r1+80(FP)
337 MOVD R0, r2+88(FP)
338 MOVD R0, err+96(FP)
339 MOVW R3, R4
340 CMP R4, $-1
341 BNE done
342 BL addrerrno<>(SB)
343 MOVWZ 0(R3), R3
344 MOVD R3, err+96(FP)
345done:
346 RET
347
348// func svcCall(fnptr unsafe.Pointer, argv *unsafe.Pointer, dsa *uint64)
349TEXT ·svcCall(SB),NOSPLIT,$0
350 BL runtime·save_g(SB) // Save g and stack pointer
351 MOVW PSALAA, R8
352 MOVD LCA64(R8), R8
353 MOVD SAVSTACK_ASYNC(R8), R9
354 MOVD R15, 0(R9)
355
356 MOVD argv+8(FP), R1 // Move function arguments into registers
357 MOVD dsa+16(FP), g
358 MOVD fnptr+0(FP), R15
359
360 BYTE $0x0D // Branch to function
361 BYTE $0xEF
362
363 BL runtime·load_g(SB) // Restore g and stack pointer
364 MOVW PSALAA, R8
365 MOVD LCA64(R8), R8
366 MOVD SAVSTACK_ASYNC(R8), R9
367 MOVD 0(R9), R15
368
369 RET
370
371// func svcLoad(name *byte) unsafe.Pointer
372TEXT ·svcLoad(SB),NOSPLIT,$0
373 MOVD R15, R2 // Save go stack pointer
374 MOVD name+0(FP), R0 // Move SVC args into registers
375 MOVD $0x80000000, R1
376 MOVD $0, R15
377 BYTE $0x0A // SVC 08 LOAD
378 BYTE $0x08
379 MOVW R15, R3 // Save return code from SVC
380 MOVD R2, R15 // Restore go stack pointer
381 CMP R3, $0 // Check SVC return code
382 BNE error
383
384 MOVD $-2, R3 // Reset last bit of entry point to zero
385 AND R0, R3
386 MOVD R3, addr+8(FP) // Return entry point returned by SVC
387 CMP R0, R3 // Check if last bit of entry point was set
388 BNE done
389
390 MOVD R15, R2 // Save go stack pointer
391 MOVD $0, R15 // Move SVC args into registers (entry point still in r0 from SVC 08)
392 BYTE $0x0A // SVC 09 DELETE
393 BYTE $0x09
394 MOVD R2, R15 // Restore go stack pointer
395
396error:
397 MOVD $0, addr+8(FP) // Return 0 on failure
398done:
399 XOR R0, R0 // Reset r0 to 0
400 RET
401
402// func svcUnload(name *byte, fnptr unsafe.Pointer) int64
403TEXT ·svcUnload(SB),NOSPLIT,$0
404 MOVD R15, R2 // Save go stack pointer
405 MOVD name+0(FP), R0 // Move SVC args into registers
406 MOVD addr+8(FP), R15
407 BYTE $0x0A // SVC 09
408 BYTE $0x09
409 XOR R0, R0 // Reset r0 to 0
410 MOVD R15, R1 // Save SVC return code
411 MOVD R2, R15 // Restore go stack pointer
412 MOVD R1, rc+0(FP) // Return SVC return code
413 RET
414
415// func gettid() uint64
416TEXT ·gettid(SB), NOSPLIT, $0
417 // Get library control area (LCA).
418 MOVW PSALAA, R8
419 MOVD LCA64(R8), R8
420
421 // Get CEECAATHDID
422 MOVD CAA(R8), R9
423 MOVD 0x3D0(R9), R9
424 MOVD R9, ret+0(FP)
425
426 RET