1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Single-step support. |
4 | * |
5 | * Copyright (C) 2004 Paul Mackerras <paulus@au.ibm.com>, IBM |
6 | */ |
7 | #include <linux/kernel.h> |
8 | #include <linux/kprobes.h> |
9 | #include <linux/ptrace.h> |
10 | #include <linux/prefetch.h> |
11 | #include <asm/sstep.h> |
12 | #include <asm/processor.h> |
13 | #include <linux/uaccess.h> |
14 | #include <asm/cpu_has_feature.h> |
15 | #include <asm/cputable.h> |
16 | #include <asm/disassemble.h> |
17 | |
18 | #ifdef CONFIG_PPC64 |
19 | /* Bits in SRR1 that are copied from MSR */ |
20 | #define MSR_MASK 0xffffffff87c0ffffUL |
21 | #else |
22 | #define MSR_MASK 0x87c0ffff |
23 | #endif |
24 | |
25 | /* Bits in XER */ |
26 | #define XER_SO 0x80000000U |
27 | #define XER_OV 0x40000000U |
28 | #define XER_CA 0x20000000U |
29 | #define XER_OV32 0x00080000U |
30 | #define XER_CA32 0x00040000U |
31 | |
32 | #ifdef CONFIG_VSX |
33 | #define VSX_REGISTER_XTP(rd) ((((rd) & 1) << 5) | ((rd) & 0xfe)) |
34 | #endif |
35 | |
36 | #ifdef CONFIG_PPC_FPU |
37 | /* |
38 | * Functions in ldstfp.S |
39 | */ |
40 | extern void get_fpr(int rn, double *p); |
41 | extern void put_fpr(int rn, const double *p); |
42 | extern void get_vr(int rn, __vector128 *p); |
43 | extern void put_vr(int rn, __vector128 *p); |
44 | extern void load_vsrn(int vsr, const void *p); |
45 | extern void store_vsrn(int vsr, void *p); |
46 | extern void conv_sp_to_dp(const float *sp, double *dp); |
47 | extern void conv_dp_to_sp(const double *dp, float *sp); |
48 | #endif |
49 | |
50 | #ifdef __powerpc64__ |
51 | /* |
52 | * Functions in quad.S |
53 | */ |
54 | extern int do_lq(unsigned long ea, unsigned long *regs); |
55 | extern int do_stq(unsigned long ea, unsigned long val0, unsigned long val1); |
56 | extern int do_lqarx(unsigned long ea, unsigned long *regs); |
57 | extern int do_stqcx(unsigned long ea, unsigned long val0, unsigned long val1, |
58 | unsigned int *crp); |
59 | #endif |
60 | |
61 | #ifdef __LITTLE_ENDIAN__ |
62 | #define IS_LE 1 |
63 | #define IS_BE 0 |
64 | #else |
65 | #define IS_LE 0 |
66 | #define IS_BE 1 |
67 | #endif |
68 | |
69 | /* |
70 | * Emulate the truncation of 64 bit values in 32-bit mode. |
71 | */ |
72 | static nokprobe_inline unsigned long truncate_if_32bit(unsigned long msr, |
73 | unsigned long val) |
74 | { |
75 | if ((msr & MSR_64BIT) == 0) |
76 | val &= 0xffffffffUL; |
77 | return val; |
78 | } |
79 | |
80 | /* |
81 | * Determine whether a conditional branch instruction would branch. |
82 | */ |
83 | static nokprobe_inline int branch_taken(unsigned int instr, |
84 | const struct pt_regs *regs, |
85 | struct instruction_op *op) |
86 | { |
87 | unsigned int bo = (instr >> 21) & 0x1f; |
88 | unsigned int bi; |
89 | |
90 | if ((bo & 4) == 0) { |
91 | /* decrement counter */ |
92 | op->type |= DECCTR; |
93 | if (((bo >> 1) & 1) ^ (regs->ctr == 1)) |
94 | return 0; |
95 | } |
96 | if ((bo & 0x10) == 0) { |
97 | /* check bit from CR */ |
98 | bi = (instr >> 16) & 0x1f; |
99 | if (((regs->ccr >> (31 - bi)) & 1) != ((bo >> 3) & 1)) |
100 | return 0; |
101 | } |
102 | return 1; |
103 | } |
104 | |
105 | static nokprobe_inline long address_ok(struct pt_regs *regs, |
106 | unsigned long ea, int nb) |
107 | { |
108 | if (!user_mode(regs)) |
109 | return 1; |
110 | if (access_ok((void __user *)ea, nb)) |
111 | return 1; |
112 | if (access_ok((void __user *)ea, 1)) |
113 | /* Access overlaps the end of the user region */ |
114 | regs->dar = TASK_SIZE_MAX - 1; |
115 | else |
116 | regs->dar = ea; |
117 | return 0; |
118 | } |
119 | |
120 | /* |
121 | * Calculate effective address for a D-form instruction |
122 | */ |
123 | static nokprobe_inline unsigned long dform_ea(unsigned int instr, |
124 | const struct pt_regs *regs) |
125 | { |
126 | int ra; |
127 | unsigned long ea; |
128 | |
129 | ra = (instr >> 16) & 0x1f; |
130 | ea = (signed short) instr; /* sign-extend */ |
131 | if (ra) |
132 | ea += regs->gpr[ra]; |
133 | |
134 | return ea; |
135 | } |
136 | |
137 | #ifdef __powerpc64__ |
138 | /* |
139 | * Calculate effective address for a DS-form instruction |
140 | */ |
141 | static nokprobe_inline unsigned long dsform_ea(unsigned int instr, |
142 | const struct pt_regs *regs) |
143 | { |
144 | int ra; |
145 | unsigned long ea; |
146 | |
147 | ra = (instr >> 16) & 0x1f; |
148 | ea = (signed short) (instr & ~3); /* sign-extend */ |
149 | if (ra) |
150 | ea += regs->gpr[ra]; |
151 | |
152 | return ea; |
153 | } |
154 | |
155 | /* |
156 | * Calculate effective address for a DQ-form instruction |
157 | */ |
158 | static nokprobe_inline unsigned long dqform_ea(unsigned int instr, |
159 | const struct pt_regs *regs) |
160 | { |
161 | int ra; |
162 | unsigned long ea; |
163 | |
164 | ra = (instr >> 16) & 0x1f; |
165 | ea = (signed short) (instr & ~0xf); /* sign-extend */ |
166 | if (ra) |
167 | ea += regs->gpr[ra]; |
168 | |
169 | return ea; |
170 | } |
171 | #endif /* __powerpc64 */ |
172 | |
173 | /* |
174 | * Calculate effective address for an X-form instruction |
175 | */ |
176 | static nokprobe_inline unsigned long xform_ea(unsigned int instr, |
177 | const struct pt_regs *regs) |
178 | { |
179 | int ra, rb; |
180 | unsigned long ea; |
181 | |
182 | ra = (instr >> 16) & 0x1f; |
183 | rb = (instr >> 11) & 0x1f; |
184 | ea = regs->gpr[rb]; |
185 | if (ra) |
186 | ea += regs->gpr[ra]; |
187 | |
188 | return ea; |
189 | } |
190 | |
191 | /* |
192 | * Calculate effective address for a MLS:D-form / 8LS:D-form |
193 | * prefixed instruction |
194 | */ |
195 | static nokprobe_inline unsigned long mlsd_8lsd_ea(unsigned int instr, |
196 | unsigned int suffix, |
197 | const struct pt_regs *regs) |
198 | { |
199 | int ra, prefix_r; |
200 | unsigned int dd; |
201 | unsigned long ea, d0, d1, d; |
202 | |
203 | prefix_r = GET_PREFIX_R(instr); |
204 | ra = GET_PREFIX_RA(suffix); |
205 | |
206 | d0 = instr & 0x3ffff; |
207 | d1 = suffix & 0xffff; |
208 | d = (d0 << 16) | d1; |
209 | |
210 | /* |
211 | * sign extend a 34 bit number |
212 | */ |
213 | dd = (unsigned int)(d >> 2); |
214 | ea = (signed int)dd; |
215 | ea = (ea << 2) | (d & 0x3); |
216 | |
217 | if (!prefix_r && ra) |
218 | ea += regs->gpr[ra]; |
219 | else if (!prefix_r && !ra) |
220 | ; /* Leave ea as is */ |
221 | else if (prefix_r) |
222 | ea += regs->nip; |
223 | |
224 | /* |
225 | * (prefix_r && ra) is an invalid form. Should already be |
226 | * checked for by caller! |
227 | */ |
228 | |
229 | return ea; |
230 | } |
231 | |
232 | /* |
233 | * Return the largest power of 2, not greater than sizeof(unsigned long), |
234 | * such that x is a multiple of it. |
235 | */ |
236 | static nokprobe_inline unsigned long max_align(unsigned long x) |
237 | { |
238 | x |= sizeof(unsigned long); |
239 | return x & -x; /* isolates rightmost bit */ |
240 | } |
241 | |
242 | static nokprobe_inline unsigned long byterev_2(unsigned long x) |
243 | { |
244 | return ((x >> 8) & 0xff) | ((x & 0xff) << 8); |
245 | } |
246 | |
247 | static nokprobe_inline unsigned long byterev_4(unsigned long x) |
248 | { |
249 | return ((x >> 24) & 0xff) | ((x >> 8) & 0xff00) | |
250 | ((x & 0xff00) << 8) | ((x & 0xff) << 24); |
251 | } |
252 | |
253 | #ifdef __powerpc64__ |
254 | static nokprobe_inline unsigned long byterev_8(unsigned long x) |
255 | { |
256 | return (byterev_4(x) << 32) | byterev_4(x >> 32); |
257 | } |
258 | #endif |
259 | |
260 | static nokprobe_inline void do_byte_reverse(void *ptr, int nb) |
261 | { |
262 | switch (nb) { |
263 | case 2: |
264 | *(u16 *)ptr = byterev_2(x: *(u16 *)ptr); |
265 | break; |
266 | case 4: |
267 | *(u32 *)ptr = byterev_4(x: *(u32 *)ptr); |
268 | break; |
269 | #ifdef __powerpc64__ |
270 | case 8: |
271 | *(unsigned long *)ptr = byterev_8(*(unsigned long *)ptr); |
272 | break; |
273 | case 16: { |
274 | unsigned long *up = (unsigned long *)ptr; |
275 | unsigned long tmp; |
276 | tmp = byterev_8(up[0]); |
277 | up[0] = byterev_8(up[1]); |
278 | up[1] = tmp; |
279 | break; |
280 | } |
281 | case 32: { |
282 | unsigned long *up = (unsigned long *)ptr; |
283 | unsigned long tmp; |
284 | |
285 | tmp = byterev_8(up[0]); |
286 | up[0] = byterev_8(up[3]); |
287 | up[3] = tmp; |
288 | tmp = byterev_8(up[2]); |
289 | up[2] = byterev_8(up[1]); |
290 | up[1] = tmp; |
291 | break; |
292 | } |
293 | |
294 | #endif |
295 | default: |
296 | WARN_ON_ONCE(1); |
297 | } |
298 | } |
299 | |
300 | static __always_inline int |
301 | __read_mem_aligned(unsigned long *dest, unsigned long ea, int nb, struct pt_regs *regs) |
302 | { |
303 | unsigned long x = 0; |
304 | |
305 | switch (nb) { |
306 | case 1: |
307 | unsafe_get_user(x, (unsigned char __user *)ea, Efault); |
308 | break; |
309 | case 2: |
310 | unsafe_get_user(x, (unsigned short __user *)ea, Efault); |
311 | break; |
312 | case 4: |
313 | unsafe_get_user(x, (unsigned int __user *)ea, Efault); |
314 | break; |
315 | #ifdef __powerpc64__ |
316 | case 8: |
317 | unsafe_get_user(x, (unsigned long __user *)ea, Efault); |
318 | break; |
319 | #endif |
320 | } |
321 | *dest = x; |
322 | return 0; |
323 | |
324 | Efault: |
325 | regs->dar = ea; |
326 | return -EFAULT; |
327 | } |
328 | |
329 | static nokprobe_inline int |
330 | read_mem_aligned(unsigned long *dest, unsigned long ea, int nb, struct pt_regs *regs) |
331 | { |
332 | int err; |
333 | |
334 | if (is_kernel_addr(ea)) |
335 | return __read_mem_aligned(dest, ea, nb, regs); |
336 | |
337 | if (user_read_access_begin((void __user *)ea, nb)) { |
338 | err = __read_mem_aligned(dest, ea, nb, regs); |
339 | user_read_access_end(); |
340 | } else { |
341 | err = -EFAULT; |
342 | regs->dar = ea; |
343 | } |
344 | |
345 | return err; |
346 | } |
347 | |
348 | /* |
349 | * Copy from userspace to a buffer, using the largest possible |
350 | * aligned accesses, up to sizeof(long). |
351 | */ |
352 | static __always_inline int __copy_mem_in(u8 *dest, unsigned long ea, int nb, struct pt_regs *regs) |
353 | { |
354 | int c; |
355 | |
356 | for (; nb > 0; nb -= c) { |
357 | c = max_align(x: ea); |
358 | if (c > nb) |
359 | c = max_align(x: nb); |
360 | switch (c) { |
361 | case 1: |
362 | unsafe_get_user(*dest, (u8 __user *)ea, Efault); |
363 | break; |
364 | case 2: |
365 | unsafe_get_user(*(u16 *)dest, (u16 __user *)ea, Efault); |
366 | break; |
367 | case 4: |
368 | unsafe_get_user(*(u32 *)dest, (u32 __user *)ea, Efault); |
369 | break; |
370 | #ifdef __powerpc64__ |
371 | case 8: |
372 | unsafe_get_user(*(u64 *)dest, (u64 __user *)ea, Efault); |
373 | break; |
374 | #endif |
375 | } |
376 | dest += c; |
377 | ea += c; |
378 | } |
379 | return 0; |
380 | |
381 | Efault: |
382 | regs->dar = ea; |
383 | return -EFAULT; |
384 | } |
385 | |
386 | static nokprobe_inline int copy_mem_in(u8 *dest, unsigned long ea, int nb, struct pt_regs *regs) |
387 | { |
388 | int err; |
389 | |
390 | if (is_kernel_addr(ea)) |
391 | return __copy_mem_in(dest, ea, nb, regs); |
392 | |
393 | if (user_read_access_begin((void __user *)ea, nb)) { |
394 | err = __copy_mem_in(dest, ea, nb, regs); |
395 | user_read_access_end(); |
396 | } else { |
397 | err = -EFAULT; |
398 | regs->dar = ea; |
399 | } |
400 | |
401 | return err; |
402 | } |
403 | |
404 | static nokprobe_inline int read_mem_unaligned(unsigned long *dest, |
405 | unsigned long ea, int nb, |
406 | struct pt_regs *regs) |
407 | { |
408 | union { |
409 | unsigned long ul; |
410 | u8 b[sizeof(unsigned long)]; |
411 | } u; |
412 | int i; |
413 | int err; |
414 | |
415 | u.ul = 0; |
416 | i = IS_BE ? sizeof(unsigned long) - nb : 0; |
417 | err = copy_mem_in(dest: &u.b[i], ea, nb, regs); |
418 | if (!err) |
419 | *dest = u.ul; |
420 | return err; |
421 | } |
422 | |
423 | /* |
424 | * Read memory at address ea for nb bytes, return 0 for success |
425 | * or -EFAULT if an error occurred. N.B. nb must be 1, 2, 4 or 8. |
426 | * If nb < sizeof(long), the result is right-justified on BE systems. |
427 | */ |
428 | static int read_mem(unsigned long *dest, unsigned long ea, int nb, |
429 | struct pt_regs *regs) |
430 | { |
431 | if (!address_ok(regs, ea, nb)) |
432 | return -EFAULT; |
433 | if ((ea & (nb - 1)) == 0) |
434 | return read_mem_aligned(dest, ea, nb, regs); |
435 | return read_mem_unaligned(dest, ea, nb, regs); |
436 | } |
437 | NOKPROBE_SYMBOL(read_mem); |
438 | |
439 | static __always_inline int |
440 | __write_mem_aligned(unsigned long val, unsigned long ea, int nb, struct pt_regs *regs) |
441 | { |
442 | switch (nb) { |
443 | case 1: |
444 | unsafe_put_user(val, (unsigned char __user *)ea, Efault); |
445 | break; |
446 | case 2: |
447 | unsafe_put_user(val, (unsigned short __user *)ea, Efault); |
448 | break; |
449 | case 4: |
450 | unsafe_put_user(val, (unsigned int __user *)ea, Efault); |
451 | break; |
452 | #ifdef __powerpc64__ |
453 | case 8: |
454 | unsafe_put_user(val, (unsigned long __user *)ea, Efault); |
455 | break; |
456 | #endif |
457 | } |
458 | return 0; |
459 | |
460 | Efault: |
461 | regs->dar = ea; |
462 | return -EFAULT; |
463 | } |
464 | |
465 | static nokprobe_inline int |
466 | write_mem_aligned(unsigned long val, unsigned long ea, int nb, struct pt_regs *regs) |
467 | { |
468 | int err; |
469 | |
470 | if (is_kernel_addr(ea)) |
471 | return __write_mem_aligned(val, ea, nb, regs); |
472 | |
473 | if (user_write_access_begin((void __user *)ea, nb)) { |
474 | err = __write_mem_aligned(val, ea, nb, regs); |
475 | user_write_access_end(); |
476 | } else { |
477 | err = -EFAULT; |
478 | regs->dar = ea; |
479 | } |
480 | |
481 | return err; |
482 | } |
483 | |
484 | /* |
485 | * Copy from a buffer to userspace, using the largest possible |
486 | * aligned accesses, up to sizeof(long). |
487 | */ |
488 | static __always_inline int __copy_mem_out(u8 *dest, unsigned long ea, int nb, struct pt_regs *regs) |
489 | { |
490 | int c; |
491 | |
492 | for (; nb > 0; nb -= c) { |
493 | c = max_align(x: ea); |
494 | if (c > nb) |
495 | c = max_align(x: nb); |
496 | switch (c) { |
497 | case 1: |
498 | unsafe_put_user(*dest, (u8 __user *)ea, Efault); |
499 | break; |
500 | case 2: |
501 | unsafe_put_user(*(u16 *)dest, (u16 __user *)ea, Efault); |
502 | break; |
503 | case 4: |
504 | unsafe_put_user(*(u32 *)dest, (u32 __user *)ea, Efault); |
505 | break; |
506 | #ifdef __powerpc64__ |
507 | case 8: |
508 | unsafe_put_user(*(u64 *)dest, (u64 __user *)ea, Efault); |
509 | break; |
510 | #endif |
511 | } |
512 | dest += c; |
513 | ea += c; |
514 | } |
515 | return 0; |
516 | |
517 | Efault: |
518 | regs->dar = ea; |
519 | return -EFAULT; |
520 | } |
521 | |
522 | static nokprobe_inline int copy_mem_out(u8 *dest, unsigned long ea, int nb, struct pt_regs *regs) |
523 | { |
524 | int err; |
525 | |
526 | if (is_kernel_addr(ea)) |
527 | return __copy_mem_out(dest, ea, nb, regs); |
528 | |
529 | if (user_write_access_begin((void __user *)ea, nb)) { |
530 | err = __copy_mem_out(dest, ea, nb, regs); |
531 | user_write_access_end(); |
532 | } else { |
533 | err = -EFAULT; |
534 | regs->dar = ea; |
535 | } |
536 | |
537 | return err; |
538 | } |
539 | |
540 | static nokprobe_inline int write_mem_unaligned(unsigned long val, |
541 | unsigned long ea, int nb, |
542 | struct pt_regs *regs) |
543 | { |
544 | union { |
545 | unsigned long ul; |
546 | u8 b[sizeof(unsigned long)]; |
547 | } u; |
548 | int i; |
549 | |
550 | u.ul = val; |
551 | i = IS_BE ? sizeof(unsigned long) - nb : 0; |
552 | return copy_mem_out(dest: &u.b[i], ea, nb, regs); |
553 | } |
554 | |
555 | /* |
556 | * Write memory at address ea for nb bytes, return 0 for success |
557 | * or -EFAULT if an error occurred. N.B. nb must be 1, 2, 4 or 8. |
558 | */ |
559 | static int write_mem(unsigned long val, unsigned long ea, int nb, |
560 | struct pt_regs *regs) |
561 | { |
562 | if (!address_ok(regs, ea, nb)) |
563 | return -EFAULT; |
564 | if ((ea & (nb - 1)) == 0) |
565 | return write_mem_aligned(val, ea, nb, regs); |
566 | return write_mem_unaligned(val, ea, nb, regs); |
567 | } |
568 | NOKPROBE_SYMBOL(write_mem); |
569 | |
570 | #ifdef CONFIG_PPC_FPU |
571 | /* |
572 | * These access either the real FP register or the image in the |
573 | * thread_struct, depending on regs->msr & MSR_FP. |
574 | */ |
575 | static int do_fp_load(struct instruction_op *op, unsigned long ea, |
576 | struct pt_regs *regs, bool cross_endian) |
577 | { |
578 | int err, rn, nb; |
579 | union { |
580 | int i; |
581 | unsigned int u; |
582 | float f; |
583 | double d[2]; |
584 | unsigned long l[2]; |
585 | u8 b[2 * sizeof(double)]; |
586 | } u; |
587 | |
588 | nb = GETSIZE(op->type); |
589 | if (nb > sizeof(u)) |
590 | return -EINVAL; |
591 | if (!address_ok(regs, ea, nb)) |
592 | return -EFAULT; |
593 | rn = op->reg; |
594 | err = copy_mem_in(u.b, ea, nb, regs); |
595 | if (err) |
596 | return err; |
597 | if (unlikely(cross_endian)) { |
598 | do_byte_reverse(u.b, min(nb, 8)); |
599 | if (nb == 16) |
600 | do_byte_reverse(&u.b[8], 8); |
601 | } |
602 | preempt_disable(); |
603 | if (nb == 4) { |
604 | if (op->type & FPCONV) |
605 | conv_sp_to_dp(&u.f, &u.d[0]); |
606 | else if (op->type & SIGNEXT) |
607 | u.l[0] = u.i; |
608 | else |
609 | u.l[0] = u.u; |
610 | } |
611 | if (regs->msr & MSR_FP) |
612 | put_fpr(rn, &u.d[0]); |
613 | else |
614 | current->thread.TS_FPR(rn) = u.l[0]; |
615 | if (nb == 16) { |
616 | /* lfdp */ |
617 | rn |= 1; |
618 | if (regs->msr & MSR_FP) |
619 | put_fpr(rn, &u.d[1]); |
620 | else |
621 | current->thread.TS_FPR(rn) = u.l[1]; |
622 | } |
623 | preempt_enable(); |
624 | return 0; |
625 | } |
626 | NOKPROBE_SYMBOL(do_fp_load); |
627 | |
628 | static int do_fp_store(struct instruction_op *op, unsigned long ea, |
629 | struct pt_regs *regs, bool cross_endian) |
630 | { |
631 | int rn, nb; |
632 | union { |
633 | unsigned int u; |
634 | float f; |
635 | double d[2]; |
636 | unsigned long l[2]; |
637 | u8 b[2 * sizeof(double)]; |
638 | } u; |
639 | |
640 | nb = GETSIZE(op->type); |
641 | if (nb > sizeof(u)) |
642 | return -EINVAL; |
643 | if (!address_ok(regs, ea, nb)) |
644 | return -EFAULT; |
645 | rn = op->reg; |
646 | preempt_disable(); |
647 | if (regs->msr & MSR_FP) |
648 | get_fpr(rn, &u.d[0]); |
649 | else |
650 | u.l[0] = current->thread.TS_FPR(rn); |
651 | if (nb == 4) { |
652 | if (op->type & FPCONV) |
653 | conv_dp_to_sp(&u.d[0], &u.f); |
654 | else |
655 | u.u = u.l[0]; |
656 | } |
657 | if (nb == 16) { |
658 | rn |= 1; |
659 | if (regs->msr & MSR_FP) |
660 | get_fpr(rn, &u.d[1]); |
661 | else |
662 | u.l[1] = current->thread.TS_FPR(rn); |
663 | } |
664 | preempt_enable(); |
665 | if (unlikely(cross_endian)) { |
666 | do_byte_reverse(u.b, min(nb, 8)); |
667 | if (nb == 16) |
668 | do_byte_reverse(&u.b[8], 8); |
669 | } |
670 | return copy_mem_out(u.b, ea, nb, regs); |
671 | } |
672 | NOKPROBE_SYMBOL(do_fp_store); |
673 | #endif |
674 | |
675 | #ifdef CONFIG_ALTIVEC |
676 | /* For Altivec/VMX, no need to worry about alignment */ |
677 | static nokprobe_inline int do_vec_load(int rn, unsigned long ea, |
678 | int size, struct pt_regs *regs, |
679 | bool cross_endian) |
680 | { |
681 | int err; |
682 | union { |
683 | __vector128 v; |
684 | u8 b[sizeof(__vector128)]; |
685 | } u = {}; |
686 | |
687 | if (size > sizeof(u)) |
688 | return -EINVAL; |
689 | |
690 | if (!address_ok(regs, ea & ~0xfUL, 16)) |
691 | return -EFAULT; |
692 | /* align to multiple of size */ |
693 | ea &= ~(size - 1); |
694 | err = copy_mem_in(&u.b[ea & 0xf], ea, size, regs); |
695 | if (err) |
696 | return err; |
697 | if (unlikely(cross_endian)) |
698 | do_byte_reverse(&u.b[ea & 0xf], min_t(size_t, size, sizeof(u))); |
699 | preempt_disable(); |
700 | if (regs->msr & MSR_VEC) |
701 | put_vr(rn, &u.v); |
702 | else |
703 | current->thread.vr_state.vr[rn] = u.v; |
704 | preempt_enable(); |
705 | return 0; |
706 | } |
707 | |
708 | static nokprobe_inline int do_vec_store(int rn, unsigned long ea, |
709 | int size, struct pt_regs *regs, |
710 | bool cross_endian) |
711 | { |
712 | union { |
713 | __vector128 v; |
714 | u8 b[sizeof(__vector128)]; |
715 | } u; |
716 | |
717 | if (size > sizeof(u)) |
718 | return -EINVAL; |
719 | |
720 | if (!address_ok(regs, ea & ~0xfUL, 16)) |
721 | return -EFAULT; |
722 | /* align to multiple of size */ |
723 | ea &= ~(size - 1); |
724 | |
725 | preempt_disable(); |
726 | if (regs->msr & MSR_VEC) |
727 | get_vr(rn, &u.v); |
728 | else |
729 | u.v = current->thread.vr_state.vr[rn]; |
730 | preempt_enable(); |
731 | if (unlikely(cross_endian)) |
732 | do_byte_reverse(&u.b[ea & 0xf], min_t(size_t, size, sizeof(u))); |
733 | return copy_mem_out(&u.b[ea & 0xf], ea, size, regs); |
734 | } |
735 | #endif /* CONFIG_ALTIVEC */ |
736 | |
737 | #ifdef __powerpc64__ |
738 | static nokprobe_inline int emulate_lq(struct pt_regs *regs, unsigned long ea, |
739 | int reg, bool cross_endian) |
740 | { |
741 | int err; |
742 | |
743 | if (!address_ok(regs, ea, 16)) |
744 | return -EFAULT; |
745 | /* if aligned, should be atomic */ |
746 | if ((ea & 0xf) == 0) { |
747 | err = do_lq(ea, ®s->gpr[reg]); |
748 | } else { |
749 | err = read_mem(®s->gpr[reg + IS_LE], ea, 8, regs); |
750 | if (!err) |
751 | err = read_mem(®s->gpr[reg + IS_BE], ea + 8, 8, regs); |
752 | } |
753 | if (!err && unlikely(cross_endian)) |
754 | do_byte_reverse(®s->gpr[reg], 16); |
755 | return err; |
756 | } |
757 | |
758 | static nokprobe_inline int emulate_stq(struct pt_regs *regs, unsigned long ea, |
759 | int reg, bool cross_endian) |
760 | { |
761 | int err; |
762 | unsigned long vals[2]; |
763 | |
764 | if (!address_ok(regs, ea, 16)) |
765 | return -EFAULT; |
766 | vals[0] = regs->gpr[reg]; |
767 | vals[1] = regs->gpr[reg + 1]; |
768 | if (unlikely(cross_endian)) |
769 | do_byte_reverse(vals, 16); |
770 | |
771 | /* if aligned, should be atomic */ |
772 | if ((ea & 0xf) == 0) |
773 | return do_stq(ea, vals[0], vals[1]); |
774 | |
775 | err = write_mem(vals[IS_LE], ea, 8, regs); |
776 | if (!err) |
777 | err = write_mem(vals[IS_BE], ea + 8, 8, regs); |
778 | return err; |
779 | } |
780 | #endif /* __powerpc64 */ |
781 | |
782 | #ifdef CONFIG_VSX |
783 | void emulate_vsx_load(struct instruction_op *op, union vsx_reg *reg, |
784 | const void *mem, bool rev) |
785 | { |
786 | int size, read_size; |
787 | int i, j; |
788 | const unsigned int *wp; |
789 | const unsigned short *hp; |
790 | const unsigned char *bp; |
791 | |
792 | size = GETSIZE(op->type); |
793 | reg->d[0] = reg->d[1] = 0; |
794 | |
795 | switch (op->element_size) { |
796 | case 32: |
797 | /* [p]lxvp[x] */ |
798 | case 16: |
799 | /* whole vector; lxv[x] or lxvl[l] */ |
800 | if (size == 0) |
801 | break; |
802 | memcpy(reg, mem, size); |
803 | if (IS_LE && (op->vsx_flags & VSX_LDLEFT)) |
804 | rev = !rev; |
805 | if (rev) |
806 | do_byte_reverse(reg, size); |
807 | break; |
808 | case 8: |
809 | /* scalar loads, lxvd2x, lxvdsx */ |
810 | read_size = (size >= 8) ? 8 : size; |
811 | i = IS_LE ? 8 : 8 - read_size; |
812 | memcpy(®->b[i], mem, read_size); |
813 | if (rev) |
814 | do_byte_reverse(®->b[i], 8); |
815 | if (size < 8) { |
816 | if (op->type & SIGNEXT) { |
817 | /* size == 4 is the only case here */ |
818 | reg->d[IS_LE] = (signed int) reg->d[IS_LE]; |
819 | } else if (op->vsx_flags & VSX_FPCONV) { |
820 | preempt_disable(); |
821 | conv_sp_to_dp(®->fp[1 + IS_LE], |
822 | ®->dp[IS_LE]); |
823 | preempt_enable(); |
824 | } |
825 | } else { |
826 | if (size == 16) { |
827 | unsigned long v = *(unsigned long *)(mem + 8); |
828 | reg->d[IS_BE] = !rev ? v : byterev_8(v); |
829 | } else if (op->vsx_flags & VSX_SPLAT) |
830 | reg->d[IS_BE] = reg->d[IS_LE]; |
831 | } |
832 | break; |
833 | case 4: |
834 | /* lxvw4x, lxvwsx */ |
835 | wp = mem; |
836 | for (j = 0; j < size / 4; ++j) { |
837 | i = IS_LE ? 3 - j : j; |
838 | reg->w[i] = !rev ? *wp++ : byterev_4(*wp++); |
839 | } |
840 | if (op->vsx_flags & VSX_SPLAT) { |
841 | u32 val = reg->w[IS_LE ? 3 : 0]; |
842 | for (; j < 4; ++j) { |
843 | i = IS_LE ? 3 - j : j; |
844 | reg->w[i] = val; |
845 | } |
846 | } |
847 | break; |
848 | case 2: |
849 | /* lxvh8x */ |
850 | hp = mem; |
851 | for (j = 0; j < size / 2; ++j) { |
852 | i = IS_LE ? 7 - j : j; |
853 | reg->h[i] = !rev ? *hp++ : byterev_2(*hp++); |
854 | } |
855 | break; |
856 | case 1: |
857 | /* lxvb16x */ |
858 | bp = mem; |
859 | for (j = 0; j < size; ++j) { |
860 | i = IS_LE ? 15 - j : j; |
861 | reg->b[i] = *bp++; |
862 | } |
863 | break; |
864 | } |
865 | } |
866 | EXPORT_SYMBOL_GPL(emulate_vsx_load); |
867 | NOKPROBE_SYMBOL(emulate_vsx_load); |
868 | |
869 | void emulate_vsx_store(struct instruction_op *op, const union vsx_reg *reg, |
870 | void *mem, bool rev) |
871 | { |
872 | int size, write_size; |
873 | int i, j; |
874 | union vsx_reg buf; |
875 | unsigned int *wp; |
876 | unsigned short *hp; |
877 | unsigned char *bp; |
878 | |
879 | size = GETSIZE(op->type); |
880 | |
881 | switch (op->element_size) { |
882 | case 32: |
883 | /* [p]stxvp[x] */ |
884 | if (size == 0) |
885 | break; |
886 | if (rev) { |
887 | /* reverse 32 bytes */ |
888 | union vsx_reg buf32[2]; |
889 | buf32[0].d[0] = byterev_8(reg[1].d[1]); |
890 | buf32[0].d[1] = byterev_8(reg[1].d[0]); |
891 | buf32[1].d[0] = byterev_8(reg[0].d[1]); |
892 | buf32[1].d[1] = byterev_8(reg[0].d[0]); |
893 | memcpy(mem, buf32, size); |
894 | } else { |
895 | memcpy(mem, reg, size); |
896 | } |
897 | break; |
898 | case 16: |
899 | /* stxv, stxvx, stxvl, stxvll */ |
900 | if (size == 0) |
901 | break; |
902 | if (IS_LE && (op->vsx_flags & VSX_LDLEFT)) |
903 | rev = !rev; |
904 | if (rev) { |
905 | /* reverse 16 bytes */ |
906 | buf.d[0] = byterev_8(reg->d[1]); |
907 | buf.d[1] = byterev_8(reg->d[0]); |
908 | reg = &buf; |
909 | } |
910 | memcpy(mem, reg, size); |
911 | break; |
912 | case 8: |
913 | /* scalar stores, stxvd2x */ |
914 | write_size = (size >= 8) ? 8 : size; |
915 | i = IS_LE ? 8 : 8 - write_size; |
916 | if (size < 8 && op->vsx_flags & VSX_FPCONV) { |
917 | buf.d[0] = buf.d[1] = 0; |
918 | preempt_disable(); |
919 | conv_dp_to_sp(®->dp[IS_LE], &buf.fp[1 + IS_LE]); |
920 | preempt_enable(); |
921 | reg = &buf; |
922 | } |
923 | memcpy(mem, ®->b[i], write_size); |
924 | if (size == 16) |
925 | memcpy(mem + 8, ®->d[IS_BE], 8); |
926 | if (unlikely(rev)) { |
927 | do_byte_reverse(mem, write_size); |
928 | if (size == 16) |
929 | do_byte_reverse(mem + 8, 8); |
930 | } |
931 | break; |
932 | case 4: |
933 | /* stxvw4x */ |
934 | wp = mem; |
935 | for (j = 0; j < size / 4; ++j) { |
936 | i = IS_LE ? 3 - j : j; |
937 | *wp++ = !rev ? reg->w[i] : byterev_4(reg->w[i]); |
938 | } |
939 | break; |
940 | case 2: |
941 | /* stxvh8x */ |
942 | hp = mem; |
943 | for (j = 0; j < size / 2; ++j) { |
944 | i = IS_LE ? 7 - j : j; |
945 | *hp++ = !rev ? reg->h[i] : byterev_2(reg->h[i]); |
946 | } |
947 | break; |
948 | case 1: |
949 | /* stvxb16x */ |
950 | bp = mem; |
951 | for (j = 0; j < size; ++j) { |
952 | i = IS_LE ? 15 - j : j; |
953 | *bp++ = reg->b[i]; |
954 | } |
955 | break; |
956 | } |
957 | } |
958 | EXPORT_SYMBOL_GPL(emulate_vsx_store); |
959 | NOKPROBE_SYMBOL(emulate_vsx_store); |
960 | |
961 | static nokprobe_inline int do_vsx_load(struct instruction_op *op, |
962 | unsigned long ea, struct pt_regs *regs, |
963 | bool cross_endian) |
964 | { |
965 | int reg = op->reg; |
966 | int i, j, nr_vsx_regs; |
967 | u8 mem[32]; |
968 | union vsx_reg buf[2]; |
969 | int size = GETSIZE(op->type); |
970 | |
971 | if (!address_ok(regs, ea, size) || copy_mem_in(mem, ea, size, regs)) |
972 | return -EFAULT; |
973 | |
974 | nr_vsx_regs = max(1ul, size / sizeof(__vector128)); |
975 | emulate_vsx_load(op, buf, mem, cross_endian); |
976 | preempt_disable(); |
977 | if (reg < 32) { |
978 | /* FP regs + extensions */ |
979 | if (regs->msr & MSR_FP) { |
980 | for (i = 0; i < nr_vsx_regs; i++) { |
981 | j = IS_LE ? nr_vsx_regs - i - 1 : i; |
982 | load_vsrn(reg + i, &buf[j].v); |
983 | } |
984 | } else { |
985 | for (i = 0; i < nr_vsx_regs; i++) { |
986 | j = IS_LE ? nr_vsx_regs - i - 1 : i; |
987 | current->thread.fp_state.fpr[reg + i][0] = buf[j].d[0]; |
988 | current->thread.fp_state.fpr[reg + i][1] = buf[j].d[1]; |
989 | } |
990 | } |
991 | } else { |
992 | if (regs->msr & MSR_VEC) { |
993 | for (i = 0; i < nr_vsx_regs; i++) { |
994 | j = IS_LE ? nr_vsx_regs - i - 1 : i; |
995 | load_vsrn(reg + i, &buf[j].v); |
996 | } |
997 | } else { |
998 | for (i = 0; i < nr_vsx_regs; i++) { |
999 | j = IS_LE ? nr_vsx_regs - i - 1 : i; |
1000 | current->thread.vr_state.vr[reg - 32 + i] = buf[j].v; |
1001 | } |
1002 | } |
1003 | } |
1004 | preempt_enable(); |
1005 | return 0; |
1006 | } |
1007 | |
1008 | static nokprobe_inline int do_vsx_store(struct instruction_op *op, |
1009 | unsigned long ea, struct pt_regs *regs, |
1010 | bool cross_endian) |
1011 | { |
1012 | int reg = op->reg; |
1013 | int i, j, nr_vsx_regs; |
1014 | u8 mem[32]; |
1015 | union vsx_reg buf[2]; |
1016 | int size = GETSIZE(op->type); |
1017 | |
1018 | if (!address_ok(regs, ea, size)) |
1019 | return -EFAULT; |
1020 | |
1021 | nr_vsx_regs = max(1ul, size / sizeof(__vector128)); |
1022 | preempt_disable(); |
1023 | if (reg < 32) { |
1024 | /* FP regs + extensions */ |
1025 | if (regs->msr & MSR_FP) { |
1026 | for (i = 0; i < nr_vsx_regs; i++) { |
1027 | j = IS_LE ? nr_vsx_regs - i - 1 : i; |
1028 | store_vsrn(reg + i, &buf[j].v); |
1029 | } |
1030 | } else { |
1031 | for (i = 0; i < nr_vsx_regs; i++) { |
1032 | j = IS_LE ? nr_vsx_regs - i - 1 : i; |
1033 | buf[j].d[0] = current->thread.fp_state.fpr[reg + i][0]; |
1034 | buf[j].d[1] = current->thread.fp_state.fpr[reg + i][1]; |
1035 | } |
1036 | } |
1037 | } else { |
1038 | if (regs->msr & MSR_VEC) { |
1039 | for (i = 0; i < nr_vsx_regs; i++) { |
1040 | j = IS_LE ? nr_vsx_regs - i - 1 : i; |
1041 | store_vsrn(reg + i, &buf[j].v); |
1042 | } |
1043 | } else { |
1044 | for (i = 0; i < nr_vsx_regs; i++) { |
1045 | j = IS_LE ? nr_vsx_regs - i - 1 : i; |
1046 | buf[j].v = current->thread.vr_state.vr[reg - 32 + i]; |
1047 | } |
1048 | } |
1049 | } |
1050 | preempt_enable(); |
1051 | emulate_vsx_store(op, buf, mem, cross_endian); |
1052 | return copy_mem_out(mem, ea, size, regs); |
1053 | } |
1054 | #endif /* CONFIG_VSX */ |
1055 | |
1056 | static __always_inline int __emulate_dcbz(unsigned long ea) |
1057 | { |
1058 | unsigned long i; |
1059 | unsigned long size = l1_dcache_bytes(); |
1060 | |
1061 | for (i = 0; i < size; i += sizeof(long)) |
1062 | unsafe_put_user(0, (unsigned long __user *)(ea + i), Efault); |
1063 | |
1064 | return 0; |
1065 | |
1066 | Efault: |
1067 | return -EFAULT; |
1068 | } |
1069 | |
1070 | int emulate_dcbz(unsigned long ea, struct pt_regs *regs) |
1071 | { |
1072 | int err; |
1073 | unsigned long size = l1_dcache_bytes(); |
1074 | |
1075 | ea = truncate_if_32bit(msr: regs->msr, val: ea); |
1076 | ea &= ~(size - 1); |
1077 | if (!address_ok(regs, ea, nb: size)) |
1078 | return -EFAULT; |
1079 | |
1080 | if (is_kernel_addr(ea)) { |
1081 | err = __emulate_dcbz(ea); |
1082 | } else if (user_write_access_begin((void __user *)ea, size)) { |
1083 | err = __emulate_dcbz(ea); |
1084 | user_write_access_end(); |
1085 | } else { |
1086 | err = -EFAULT; |
1087 | } |
1088 | |
1089 | if (err) |
1090 | regs->dar = ea; |
1091 | |
1092 | |
1093 | return err; |
1094 | } |
1095 | NOKPROBE_SYMBOL(emulate_dcbz); |
1096 | |
1097 | #define __put_user_asmx(x, addr, err, op, cr) \ |
1098 | __asm__ __volatile__( \ |
1099 | ".machine push\n" \ |
1100 | ".machine power8\n" \ |
1101 | "1: " op " %2,0,%3\n" \ |
1102 | ".machine pop\n" \ |
1103 | " mfcr %1\n" \ |
1104 | "2:\n" \ |
1105 | ".section .fixup,\"ax\"\n" \ |
1106 | "3: li %0,%4\n" \ |
1107 | " b 2b\n" \ |
1108 | ".previous\n" \ |
1109 | EX_TABLE(1b, 3b) \ |
1110 | : "=r" (err), "=r" (cr) \ |
1111 | : "r" (x), "r" (addr), "i" (-EFAULT), "0" (err)) |
1112 | |
1113 | #define __get_user_asmx(x, addr, err, op) \ |
1114 | __asm__ __volatile__( \ |
1115 | ".machine push\n" \ |
1116 | ".machine power8\n" \ |
1117 | "1: "op" %1,0,%2\n" \ |
1118 | ".machine pop\n" \ |
1119 | "2:\n" \ |
1120 | ".section .fixup,\"ax\"\n" \ |
1121 | "3: li %0,%3\n" \ |
1122 | " b 2b\n" \ |
1123 | ".previous\n" \ |
1124 | EX_TABLE(1b, 3b) \ |
1125 | : "=r" (err), "=r" (x) \ |
1126 | : "r" (addr), "i" (-EFAULT), "0" (err)) |
1127 | |
1128 | #define __cacheop_user_asmx(addr, err, op) \ |
1129 | __asm__ __volatile__( \ |
1130 | "1: "op" 0,%1\n" \ |
1131 | "2:\n" \ |
1132 | ".section .fixup,\"ax\"\n" \ |
1133 | "3: li %0,%3\n" \ |
1134 | " b 2b\n" \ |
1135 | ".previous\n" \ |
1136 | EX_TABLE(1b, 3b) \ |
1137 | : "=r" (err) \ |
1138 | : "r" (addr), "i" (-EFAULT), "0" (err)) |
1139 | |
1140 | static nokprobe_inline void set_cr0(const struct pt_regs *regs, |
1141 | struct instruction_op *op) |
1142 | { |
1143 | long val = op->val; |
1144 | |
1145 | op->type |= SETCC; |
1146 | op->ccval = (regs->ccr & 0x0fffffff) | ((regs->xer >> 3) & 0x10000000); |
1147 | if (!(regs->msr & MSR_64BIT)) |
1148 | val = (int) val; |
1149 | if (val < 0) |
1150 | op->ccval |= 0x80000000; |
1151 | else if (val > 0) |
1152 | op->ccval |= 0x40000000; |
1153 | else |
1154 | op->ccval |= 0x20000000; |
1155 | } |
1156 | |
1157 | static nokprobe_inline void set_ca32(struct instruction_op *op, bool val) |
1158 | { |
1159 | if (cpu_has_feature(CPU_FTR_ARCH_300)) { |
1160 | if (val) |
1161 | op->xerval |= XER_CA32; |
1162 | else |
1163 | op->xerval &= ~XER_CA32; |
1164 | } |
1165 | } |
1166 | |
1167 | static nokprobe_inline void add_with_carry(const struct pt_regs *regs, |
1168 | struct instruction_op *op, int rd, |
1169 | unsigned long val1, unsigned long val2, |
1170 | unsigned long carry_in) |
1171 | { |
1172 | unsigned long val = val1 + val2; |
1173 | |
1174 | if (carry_in) |
1175 | ++val; |
1176 | op->type = COMPUTE | SETREG | SETXER; |
1177 | op->reg = rd; |
1178 | op->val = val; |
1179 | val = truncate_if_32bit(msr: regs->msr, val); |
1180 | val1 = truncate_if_32bit(msr: regs->msr, val: val1); |
1181 | op->xerval = regs->xer; |
1182 | if (val < val1 || (carry_in && val == val1)) |
1183 | op->xerval |= XER_CA; |
1184 | else |
1185 | op->xerval &= ~XER_CA; |
1186 | |
1187 | set_ca32(op, val: (unsigned int)val < (unsigned int)val1 || |
1188 | (carry_in && (unsigned int)val == (unsigned int)val1)); |
1189 | } |
1190 | |
1191 | static nokprobe_inline void do_cmp_signed(const struct pt_regs *regs, |
1192 | struct instruction_op *op, |
1193 | long v1, long v2, int crfld) |
1194 | { |
1195 | unsigned int crval, shift; |
1196 | |
1197 | op->type = COMPUTE | SETCC; |
1198 | crval = (regs->xer >> 31) & 1; /* get SO bit */ |
1199 | if (v1 < v2) |
1200 | crval |= 8; |
1201 | else if (v1 > v2) |
1202 | crval |= 4; |
1203 | else |
1204 | crval |= 2; |
1205 | shift = (7 - crfld) * 4; |
1206 | op->ccval = (regs->ccr & ~(0xf << shift)) | (crval << shift); |
1207 | } |
1208 | |
1209 | static nokprobe_inline void do_cmp_unsigned(const struct pt_regs *regs, |
1210 | struct instruction_op *op, |
1211 | unsigned long v1, |
1212 | unsigned long v2, int crfld) |
1213 | { |
1214 | unsigned int crval, shift; |
1215 | |
1216 | op->type = COMPUTE | SETCC; |
1217 | crval = (regs->xer >> 31) & 1; /* get SO bit */ |
1218 | if (v1 < v2) |
1219 | crval |= 8; |
1220 | else if (v1 > v2) |
1221 | crval |= 4; |
1222 | else |
1223 | crval |= 2; |
1224 | shift = (7 - crfld) * 4; |
1225 | op->ccval = (regs->ccr & ~(0xf << shift)) | (crval << shift); |
1226 | } |
1227 | |
1228 | static nokprobe_inline void do_cmpb(const struct pt_regs *regs, |
1229 | struct instruction_op *op, |
1230 | unsigned long v1, unsigned long v2) |
1231 | { |
1232 | unsigned long long out_val, mask; |
1233 | int i; |
1234 | |
1235 | out_val = 0; |
1236 | for (i = 0; i < 8; i++) { |
1237 | mask = 0xffUL << (i * 8); |
1238 | if ((v1 & mask) == (v2 & mask)) |
1239 | out_val |= mask; |
1240 | } |
1241 | op->val = out_val; |
1242 | } |
1243 | |
1244 | /* |
1245 | * The size parameter is used to adjust the equivalent popcnt instruction. |
1246 | * popcntb = 8, popcntw = 32, popcntd = 64 |
1247 | */ |
1248 | static nokprobe_inline void do_popcnt(const struct pt_regs *regs, |
1249 | struct instruction_op *op, |
1250 | unsigned long v1, int size) |
1251 | { |
1252 | unsigned long long out = v1; |
1253 | |
1254 | out -= (out >> 1) & 0x5555555555555555ULL; |
1255 | out = (0x3333333333333333ULL & out) + |
1256 | (0x3333333333333333ULL & (out >> 2)); |
1257 | out = (out + (out >> 4)) & 0x0f0f0f0f0f0f0f0fULL; |
1258 | |
1259 | if (size == 8) { /* popcntb */ |
1260 | op->val = out; |
1261 | return; |
1262 | } |
1263 | out += out >> 8; |
1264 | out += out >> 16; |
1265 | if (size == 32) { /* popcntw */ |
1266 | op->val = out & 0x0000003f0000003fULL; |
1267 | return; |
1268 | } |
1269 | |
1270 | out = (out + (out >> 32)) & 0x7f; |
1271 | op->val = out; /* popcntd */ |
1272 | } |
1273 | |
1274 | #ifdef CONFIG_PPC64 |
1275 | static nokprobe_inline void do_bpermd(const struct pt_regs *regs, |
1276 | struct instruction_op *op, |
1277 | unsigned long v1, unsigned long v2) |
1278 | { |
1279 | unsigned char perm, idx; |
1280 | unsigned int i; |
1281 | |
1282 | perm = 0; |
1283 | for (i = 0; i < 8; i++) { |
1284 | idx = (v1 >> (i * 8)) & 0xff; |
1285 | if (idx < 64) |
1286 | if (v2 & PPC_BIT(idx)) |
1287 | perm |= 1 << i; |
1288 | } |
1289 | op->val = perm; |
1290 | } |
1291 | #endif /* CONFIG_PPC64 */ |
1292 | /* |
1293 | * The size parameter adjusts the equivalent prty instruction. |
1294 | * prtyw = 32, prtyd = 64 |
1295 | */ |
1296 | static nokprobe_inline void do_prty(const struct pt_regs *regs, |
1297 | struct instruction_op *op, |
1298 | unsigned long v, int size) |
1299 | { |
1300 | unsigned long long res = v ^ (v >> 8); |
1301 | |
1302 | res ^= res >> 16; |
1303 | if (size == 32) { /* prtyw */ |
1304 | op->val = res & 0x0000000100000001ULL; |
1305 | return; |
1306 | } |
1307 | |
1308 | res ^= res >> 32; |
1309 | op->val = res & 1; /*prtyd */ |
1310 | } |
1311 | |
1312 | static nokprobe_inline int trap_compare(long v1, long v2) |
1313 | { |
1314 | int ret = 0; |
1315 | |
1316 | if (v1 < v2) |
1317 | ret |= 0x10; |
1318 | else if (v1 > v2) |
1319 | ret |= 0x08; |
1320 | else |
1321 | ret |= 0x04; |
1322 | if ((unsigned long)v1 < (unsigned long)v2) |
1323 | ret |= 0x02; |
1324 | else if ((unsigned long)v1 > (unsigned long)v2) |
1325 | ret |= 0x01; |
1326 | return ret; |
1327 | } |
1328 | |
1329 | /* |
1330 | * Elements of 32-bit rotate and mask instructions. |
1331 | */ |
1332 | #define MASK32(mb, me) ((0xffffffffUL >> (mb)) + \ |
1333 | ((signed long)-0x80000000L >> (me)) + ((me) >= (mb))) |
1334 | #ifdef __powerpc64__ |
1335 | #define MASK64_L(mb) (~0UL >> (mb)) |
1336 | #define MASK64_R(me) ((signed long)-0x8000000000000000L >> (me)) |
1337 | #define MASK64(mb, me) (MASK64_L(mb) + MASK64_R(me) + ((me) >= (mb))) |
1338 | #define DATA32(x) (((x) & 0xffffffffUL) | (((x) & 0xffffffffUL) << 32)) |
1339 | #else |
1340 | #define DATA32(x) (x) |
1341 | #endif |
1342 | #define ROTATE(x, n) ((n) ? (((x) << (n)) | ((x) >> (8 * sizeof(long) - (n)))) : (x)) |
1343 | |
1344 | /* |
1345 | * Decode an instruction, and return information about it in *op |
1346 | * without changing *regs. |
1347 | * Integer arithmetic and logical instructions, branches, and barrier |
1348 | * instructions can be emulated just using the information in *op. |
1349 | * |
1350 | * Return value is 1 if the instruction can be emulated just by |
1351 | * updating *regs with the information in *op, -1 if we need the |
1352 | * GPRs but *regs doesn't contain the full register set, or 0 |
1353 | * otherwise. |
1354 | */ |
1355 | int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, |
1356 | ppc_inst_t instr) |
1357 | { |
1358 | #ifdef CONFIG_PPC64 |
1359 | unsigned int suffixopcode, prefixtype, prefix_r; |
1360 | #endif |
1361 | unsigned int opcode, ra, rb, rc, rd, spr, u; |
1362 | unsigned long int imm; |
1363 | unsigned long int val, val2; |
1364 | unsigned int mb, me, sh; |
1365 | unsigned int word, suffix; |
1366 | long ival; |
1367 | |
1368 | word = ppc_inst_val(instr); |
1369 | suffix = ppc_inst_suffix(instr); |
1370 | |
1371 | op->type = COMPUTE; |
1372 | |
1373 | opcode = ppc_inst_primary_opcode(instr); |
1374 | switch (opcode) { |
1375 | case 16: /* bc */ |
1376 | op->type = BRANCH; |
1377 | imm = (signed short)(word & 0xfffc); |
1378 | if ((word & 2) == 0) |
1379 | imm += regs->nip; |
1380 | op->val = truncate_if_32bit(msr: regs->msr, val: imm); |
1381 | if (word & 1) |
1382 | op->type |= SETLK; |
1383 | if (branch_taken(word, regs, op)) |
1384 | op->type |= BRTAKEN; |
1385 | return 1; |
1386 | case 17: /* sc */ |
1387 | if ((word & 0xfe2) == 2) |
1388 | op->type = SYSCALL; |
1389 | else if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) && |
1390 | (word & 0xfe3) == 1) { /* scv */ |
1391 | op->type = SYSCALL_VECTORED_0; |
1392 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
1393 | goto unknown_opcode; |
1394 | } else |
1395 | op->type = UNKNOWN; |
1396 | return 0; |
1397 | case 18: /* b */ |
1398 | op->type = BRANCH | BRTAKEN; |
1399 | imm = word & 0x03fffffc; |
1400 | if (imm & 0x02000000) |
1401 | imm -= 0x04000000; |
1402 | if ((word & 2) == 0) |
1403 | imm += regs->nip; |
1404 | op->val = truncate_if_32bit(msr: regs->msr, val: imm); |
1405 | if (word & 1) |
1406 | op->type |= SETLK; |
1407 | return 1; |
1408 | case 19: |
1409 | switch ((word >> 1) & 0x3ff) { |
1410 | case 0: /* mcrf */ |
1411 | op->type = COMPUTE + SETCC; |
1412 | rd = 7 - ((word >> 23) & 0x7); |
1413 | ra = 7 - ((word >> 18) & 0x7); |
1414 | rd *= 4; |
1415 | ra *= 4; |
1416 | val = (regs->ccr >> ra) & 0xf; |
1417 | op->ccval = (regs->ccr & ~(0xfUL << rd)) | (val << rd); |
1418 | return 1; |
1419 | |
1420 | case 16: /* bclr */ |
1421 | case 528: /* bcctr */ |
1422 | op->type = BRANCH; |
1423 | imm = (word & 0x400)? regs->ctr: regs->link; |
1424 | op->val = truncate_if_32bit(msr: regs->msr, val: imm); |
1425 | if (word & 1) |
1426 | op->type |= SETLK; |
1427 | if (branch_taken(word, regs, op)) |
1428 | op->type |= BRTAKEN; |
1429 | return 1; |
1430 | |
1431 | case 18: /* rfid, scary */ |
1432 | if (user_mode(regs)) |
1433 | goto priv; |
1434 | op->type = RFI; |
1435 | return 0; |
1436 | |
1437 | case 150: /* isync */ |
1438 | op->type = BARRIER | BARRIER_ISYNC; |
1439 | return 1; |
1440 | |
1441 | case 33: /* crnor */ |
1442 | case 129: /* crandc */ |
1443 | case 193: /* crxor */ |
1444 | case 225: /* crnand */ |
1445 | case 257: /* crand */ |
1446 | case 289: /* creqv */ |
1447 | case 417: /* crorc */ |
1448 | case 449: /* cror */ |
1449 | op->type = COMPUTE + SETCC; |
1450 | ra = (word >> 16) & 0x1f; |
1451 | rb = (word >> 11) & 0x1f; |
1452 | rd = (word >> 21) & 0x1f; |
1453 | ra = (regs->ccr >> (31 - ra)) & 1; |
1454 | rb = (regs->ccr >> (31 - rb)) & 1; |
1455 | val = (word >> (6 + ra * 2 + rb)) & 1; |
1456 | op->ccval = (regs->ccr & ~(1UL << (31 - rd))) | |
1457 | (val << (31 - rd)); |
1458 | return 1; |
1459 | } |
1460 | break; |
1461 | case 31: |
1462 | switch ((word >> 1) & 0x3ff) { |
1463 | case 598: /* sync */ |
1464 | op->type = BARRIER + BARRIER_SYNC; |
1465 | #ifdef __powerpc64__ |
1466 | switch ((word >> 21) & 3) { |
1467 | case 1: /* lwsync */ |
1468 | op->type = BARRIER + BARRIER_LWSYNC; |
1469 | break; |
1470 | case 2: /* ptesync */ |
1471 | op->type = BARRIER + BARRIER_PTESYNC; |
1472 | break; |
1473 | } |
1474 | #endif |
1475 | return 1; |
1476 | |
1477 | case 854: /* eieio */ |
1478 | op->type = BARRIER + BARRIER_EIEIO; |
1479 | return 1; |
1480 | } |
1481 | break; |
1482 | } |
1483 | |
1484 | rd = (word >> 21) & 0x1f; |
1485 | ra = (word >> 16) & 0x1f; |
1486 | rb = (word >> 11) & 0x1f; |
1487 | rc = (word >> 6) & 0x1f; |
1488 | |
1489 | switch (opcode) { |
1490 | #ifdef __powerpc64__ |
1491 | case 1: |
1492 | if (!cpu_has_feature(CPU_FTR_ARCH_31)) |
1493 | goto unknown_opcode; |
1494 | |
1495 | prefix_r = GET_PREFIX_R(word); |
1496 | ra = GET_PREFIX_RA(suffix); |
1497 | rd = (suffix >> 21) & 0x1f; |
1498 | op->reg = rd; |
1499 | op->val = regs->gpr[rd]; |
1500 | suffixopcode = get_op(suffix); |
1501 | prefixtype = (word >> 24) & 0x3; |
1502 | switch (prefixtype) { |
1503 | case 2: |
1504 | if (prefix_r && ra) |
1505 | return 0; |
1506 | switch (suffixopcode) { |
1507 | case 14: /* paddi */ |
1508 | op->type = COMPUTE | PREFIXED; |
1509 | op->val = mlsd_8lsd_ea(word, suffix, regs); |
1510 | goto compute_done; |
1511 | } |
1512 | } |
1513 | break; |
1514 | case 2: /* tdi */ |
1515 | if (rd & trap_compare(regs->gpr[ra], (short) word)) |
1516 | goto trap; |
1517 | return 1; |
1518 | #endif |
1519 | case 3: /* twi */ |
1520 | if (rd & trap_compare(v1: (int)regs->gpr[ra], v2: (short) word)) |
1521 | goto trap; |
1522 | return 1; |
1523 | |
1524 | #ifdef __powerpc64__ |
1525 | case 4: |
1526 | /* |
1527 | * There are very many instructions with this primary opcode |
1528 | * introduced in the ISA as early as v2.03. However, the ones |
1529 | * we currently emulate were all introduced with ISA 3.0 |
1530 | */ |
1531 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
1532 | goto unknown_opcode; |
1533 | |
1534 | switch (word & 0x3f) { |
1535 | case 48: /* maddhd */ |
1536 | asm volatile(PPC_MADDHD(%0, %1, %2, %3) : |
1537 | "=r" (op->val) : "r" (regs->gpr[ra]), |
1538 | "r" (regs->gpr[rb]), "r" (regs->gpr[rc])); |
1539 | goto compute_done; |
1540 | |
1541 | case 49: /* maddhdu */ |
1542 | asm volatile(PPC_MADDHDU(%0, %1, %2, %3) : |
1543 | "=r" (op->val) : "r" (regs->gpr[ra]), |
1544 | "r" (regs->gpr[rb]), "r" (regs->gpr[rc])); |
1545 | goto compute_done; |
1546 | |
1547 | case 51: /* maddld */ |
1548 | asm volatile(PPC_MADDLD(%0, %1, %2, %3) : |
1549 | "=r" (op->val) : "r" (regs->gpr[ra]), |
1550 | "r" (regs->gpr[rb]), "r" (regs->gpr[rc])); |
1551 | goto compute_done; |
1552 | } |
1553 | |
1554 | /* |
1555 | * There are other instructions from ISA 3.0 with the same |
1556 | * primary opcode which do not have emulation support yet. |
1557 | */ |
1558 | goto unknown_opcode; |
1559 | #endif |
1560 | |
1561 | case 7: /* mulli */ |
1562 | op->val = regs->gpr[ra] * (short) word; |
1563 | goto compute_done; |
1564 | |
1565 | case 8: /* subfic */ |
1566 | imm = (short) word; |
1567 | add_with_carry(regs, op, rd, val1: ~regs->gpr[ra], val2: imm, carry_in: 1); |
1568 | return 1; |
1569 | |
1570 | case 10: /* cmpli */ |
1571 | imm = (unsigned short) word; |
1572 | val = regs->gpr[ra]; |
1573 | #ifdef __powerpc64__ |
1574 | if ((rd & 1) == 0) |
1575 | val = (unsigned int) val; |
1576 | #endif |
1577 | do_cmp_unsigned(regs, op, v1: val, v2: imm, crfld: rd >> 2); |
1578 | return 1; |
1579 | |
1580 | case 11: /* cmpi */ |
1581 | imm = (short) word; |
1582 | val = regs->gpr[ra]; |
1583 | #ifdef __powerpc64__ |
1584 | if ((rd & 1) == 0) |
1585 | val = (int) val; |
1586 | #endif |
1587 | do_cmp_signed(regs, op, v1: val, v2: imm, crfld: rd >> 2); |
1588 | return 1; |
1589 | |
1590 | case 12: /* addic */ |
1591 | imm = (short) word; |
1592 | add_with_carry(regs, op, rd, val1: regs->gpr[ra], val2: imm, carry_in: 0); |
1593 | return 1; |
1594 | |
1595 | case 13: /* addic. */ |
1596 | imm = (short) word; |
1597 | add_with_carry(regs, op, rd, val1: regs->gpr[ra], val2: imm, carry_in: 0); |
1598 | set_cr0(regs, op); |
1599 | return 1; |
1600 | |
1601 | case 14: /* addi */ |
1602 | imm = (short) word; |
1603 | if (ra) |
1604 | imm += regs->gpr[ra]; |
1605 | op->val = imm; |
1606 | goto compute_done; |
1607 | |
1608 | case 15: /* addis */ |
1609 | imm = ((short) word) << 16; |
1610 | if (ra) |
1611 | imm += regs->gpr[ra]; |
1612 | op->val = imm; |
1613 | goto compute_done; |
1614 | |
1615 | case 19: |
1616 | if (((word >> 1) & 0x1f) == 2) { |
1617 | /* addpcis */ |
1618 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
1619 | goto unknown_opcode; |
1620 | imm = (short) (word & 0xffc1); /* d0 + d2 fields */ |
1621 | imm |= (word >> 15) & 0x3e; /* d1 field */ |
1622 | op->val = regs->nip + (imm << 16) + 4; |
1623 | goto compute_done; |
1624 | } |
1625 | op->type = UNKNOWN; |
1626 | return 0; |
1627 | |
1628 | case 20: /* rlwimi */ |
1629 | mb = (word >> 6) & 0x1f; |
1630 | me = (word >> 1) & 0x1f; |
1631 | val = DATA32(regs->gpr[rd]); |
1632 | imm = MASK32(mb, me); |
1633 | op->val = (regs->gpr[ra] & ~imm) | (ROTATE(val, rb) & imm); |
1634 | goto logical_done; |
1635 | |
1636 | case 21: /* rlwinm */ |
1637 | mb = (word >> 6) & 0x1f; |
1638 | me = (word >> 1) & 0x1f; |
1639 | val = DATA32(regs->gpr[rd]); |
1640 | op->val = ROTATE(val, rb) & MASK32(mb, me); |
1641 | goto logical_done; |
1642 | |
1643 | case 23: /* rlwnm */ |
1644 | mb = (word >> 6) & 0x1f; |
1645 | me = (word >> 1) & 0x1f; |
1646 | rb = regs->gpr[rb] & 0x1f; |
1647 | val = DATA32(regs->gpr[rd]); |
1648 | op->val = ROTATE(val, rb) & MASK32(mb, me); |
1649 | goto logical_done; |
1650 | |
1651 | case 24: /* ori */ |
1652 | op->val = regs->gpr[rd] | (unsigned short) word; |
1653 | goto logical_done_nocc; |
1654 | |
1655 | case 25: /* oris */ |
1656 | imm = (unsigned short) word; |
1657 | op->val = regs->gpr[rd] | (imm << 16); |
1658 | goto logical_done_nocc; |
1659 | |
1660 | case 26: /* xori */ |
1661 | op->val = regs->gpr[rd] ^ (unsigned short) word; |
1662 | goto logical_done_nocc; |
1663 | |
1664 | case 27: /* xoris */ |
1665 | imm = (unsigned short) word; |
1666 | op->val = regs->gpr[rd] ^ (imm << 16); |
1667 | goto logical_done_nocc; |
1668 | |
1669 | case 28: /* andi. */ |
1670 | op->val = regs->gpr[rd] & (unsigned short) word; |
1671 | set_cr0(regs, op); |
1672 | goto logical_done_nocc; |
1673 | |
1674 | case 29: /* andis. */ |
1675 | imm = (unsigned short) word; |
1676 | op->val = regs->gpr[rd] & (imm << 16); |
1677 | set_cr0(regs, op); |
1678 | goto logical_done_nocc; |
1679 | |
1680 | #ifdef __powerpc64__ |
1681 | case 30: /* rld* */ |
1682 | mb = ((word >> 6) & 0x1f) | (word & 0x20); |
1683 | val = regs->gpr[rd]; |
1684 | if ((word & 0x10) == 0) { |
1685 | sh = rb | ((word & 2) << 4); |
1686 | val = ROTATE(val, sh); |
1687 | switch ((word >> 2) & 3) { |
1688 | case 0: /* rldicl */ |
1689 | val &= MASK64_L(mb); |
1690 | break; |
1691 | case 1: /* rldicr */ |
1692 | val &= MASK64_R(mb); |
1693 | break; |
1694 | case 2: /* rldic */ |
1695 | val &= MASK64(mb, 63 - sh); |
1696 | break; |
1697 | case 3: /* rldimi */ |
1698 | imm = MASK64(mb, 63 - sh); |
1699 | val = (regs->gpr[ra] & ~imm) | |
1700 | (val & imm); |
1701 | } |
1702 | op->val = val; |
1703 | goto logical_done; |
1704 | } else { |
1705 | sh = regs->gpr[rb] & 0x3f; |
1706 | val = ROTATE(val, sh); |
1707 | switch ((word >> 1) & 7) { |
1708 | case 0: /* rldcl */ |
1709 | op->val = val & MASK64_L(mb); |
1710 | goto logical_done; |
1711 | case 1: /* rldcr */ |
1712 | op->val = val & MASK64_R(mb); |
1713 | goto logical_done; |
1714 | } |
1715 | } |
1716 | #endif |
1717 | op->type = UNKNOWN; /* illegal instruction */ |
1718 | return 0; |
1719 | |
1720 | case 31: |
1721 | /* isel occupies 32 minor opcodes */ |
1722 | if (((word >> 1) & 0x1f) == 15) { |
1723 | mb = (word >> 6) & 0x1f; /* bc field */ |
1724 | val = (regs->ccr >> (31 - mb)) & 1; |
1725 | val2 = (ra) ? regs->gpr[ra] : 0; |
1726 | |
1727 | op->val = (val) ? val2 : regs->gpr[rb]; |
1728 | goto compute_done; |
1729 | } |
1730 | |
1731 | switch ((word >> 1) & 0x3ff) { |
1732 | case 4: /* tw */ |
1733 | if (rd == 0x1f || |
1734 | (rd & trap_compare(v1: (int)regs->gpr[ra], |
1735 | v2: (int)regs->gpr[rb]))) |
1736 | goto trap; |
1737 | return 1; |
1738 | #ifdef __powerpc64__ |
1739 | case 68: /* td */ |
1740 | if (rd & trap_compare(regs->gpr[ra], regs->gpr[rb])) |
1741 | goto trap; |
1742 | return 1; |
1743 | #endif |
1744 | case 83: /* mfmsr */ |
1745 | if (user_mode(regs)) |
1746 | goto priv; |
1747 | op->type = MFMSR; |
1748 | op->reg = rd; |
1749 | return 0; |
1750 | case 146: /* mtmsr */ |
1751 | if (user_mode(regs)) |
1752 | goto priv; |
1753 | op->type = MTMSR; |
1754 | op->reg = rd; |
1755 | op->val = 0xffffffff & ~(MSR_ME | MSR_LE); |
1756 | return 0; |
1757 | #ifdef CONFIG_PPC64 |
1758 | case 178: /* mtmsrd */ |
1759 | if (user_mode(regs)) |
1760 | goto priv; |
1761 | op->type = MTMSR; |
1762 | op->reg = rd; |
1763 | /* only MSR_EE and MSR_RI get changed if bit 15 set */ |
1764 | /* mtmsrd doesn't change MSR_HV, MSR_ME or MSR_LE */ |
1765 | imm = (word & 0x10000)? 0x8002: 0xefffffffffffeffeUL; |
1766 | op->val = imm; |
1767 | return 0; |
1768 | #endif |
1769 | |
1770 | case 19: /* mfcr */ |
1771 | imm = 0xffffffffUL; |
1772 | if ((word >> 20) & 1) { |
1773 | imm = 0xf0000000UL; |
1774 | for (sh = 0; sh < 8; ++sh) { |
1775 | if (word & (0x80000 >> sh)) |
1776 | break; |
1777 | imm >>= 4; |
1778 | } |
1779 | } |
1780 | op->val = regs->ccr & imm; |
1781 | goto compute_done; |
1782 | |
1783 | case 128: /* setb */ |
1784 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
1785 | goto unknown_opcode; |
1786 | /* |
1787 | * 'ra' encodes the CR field number (bfa) in the top 3 bits. |
1788 | * Since each CR field is 4 bits, |
1789 | * we can simply mask off the bottom two bits (bfa * 4) |
1790 | * to yield the first bit in the CR field. |
1791 | */ |
1792 | ra = ra & ~0x3; |
1793 | /* 'val' stores bits of the CR field (bfa) */ |
1794 | val = regs->ccr >> (CR0_SHIFT - ra); |
1795 | /* checks if the LT bit of CR field (bfa) is set */ |
1796 | if (val & 8) |
1797 | op->val = -1; |
1798 | /* checks if the GT bit of CR field (bfa) is set */ |
1799 | else if (val & 4) |
1800 | op->val = 1; |
1801 | else |
1802 | op->val = 0; |
1803 | goto compute_done; |
1804 | |
1805 | case 144: /* mtcrf */ |
1806 | op->type = COMPUTE + SETCC; |
1807 | imm = 0xf0000000UL; |
1808 | val = regs->gpr[rd]; |
1809 | op->ccval = regs->ccr; |
1810 | for (sh = 0; sh < 8; ++sh) { |
1811 | if (word & (0x80000 >> sh)) |
1812 | op->ccval = (op->ccval & ~imm) | |
1813 | (val & imm); |
1814 | imm >>= 4; |
1815 | } |
1816 | return 1; |
1817 | |
1818 | case 339: /* mfspr */ |
1819 | spr = ((word >> 16) & 0x1f) | ((word >> 6) & 0x3e0); |
1820 | op->type = MFSPR; |
1821 | op->reg = rd; |
1822 | op->spr = spr; |
1823 | if (spr == SPRN_XER || spr == SPRN_LR || |
1824 | spr == SPRN_CTR) |
1825 | return 1; |
1826 | return 0; |
1827 | |
1828 | case 467: /* mtspr */ |
1829 | spr = ((word >> 16) & 0x1f) | ((word >> 6) & 0x3e0); |
1830 | op->type = MTSPR; |
1831 | op->val = regs->gpr[rd]; |
1832 | op->spr = spr; |
1833 | if (spr == SPRN_XER || spr == SPRN_LR || |
1834 | spr == SPRN_CTR) |
1835 | return 1; |
1836 | return 0; |
1837 | |
1838 | /* |
1839 | * Compare instructions |
1840 | */ |
1841 | case 0: /* cmp */ |
1842 | val = regs->gpr[ra]; |
1843 | val2 = regs->gpr[rb]; |
1844 | #ifdef __powerpc64__ |
1845 | if ((rd & 1) == 0) { |
1846 | /* word (32-bit) compare */ |
1847 | val = (int) val; |
1848 | val2 = (int) val2; |
1849 | } |
1850 | #endif |
1851 | do_cmp_signed(regs, op, v1: val, v2: val2, crfld: rd >> 2); |
1852 | return 1; |
1853 | |
1854 | case 32: /* cmpl */ |
1855 | val = regs->gpr[ra]; |
1856 | val2 = regs->gpr[rb]; |
1857 | #ifdef __powerpc64__ |
1858 | if ((rd & 1) == 0) { |
1859 | /* word (32-bit) compare */ |
1860 | val = (unsigned int) val; |
1861 | val2 = (unsigned int) val2; |
1862 | } |
1863 | #endif |
1864 | do_cmp_unsigned(regs, op, v1: val, v2: val2, crfld: rd >> 2); |
1865 | return 1; |
1866 | |
1867 | case 508: /* cmpb */ |
1868 | do_cmpb(regs, op, v1: regs->gpr[rd], v2: regs->gpr[rb]); |
1869 | goto logical_done_nocc; |
1870 | |
1871 | /* |
1872 | * Arithmetic instructions |
1873 | */ |
1874 | case 8: /* subfc */ |
1875 | add_with_carry(regs, op, rd, val1: ~regs->gpr[ra], |
1876 | val2: regs->gpr[rb], carry_in: 1); |
1877 | goto arith_done; |
1878 | #ifdef __powerpc64__ |
1879 | case 9: /* mulhdu */ |
1880 | asm("mulhdu %0,%1,%2" : "=r" (op->val) : |
1881 | "r" (regs->gpr[ra]), "r" (regs->gpr[rb])); |
1882 | goto arith_done; |
1883 | #endif |
1884 | case 10: /* addc */ |
1885 | add_with_carry(regs, op, rd, val1: regs->gpr[ra], |
1886 | val2: regs->gpr[rb], carry_in: 0); |
1887 | goto arith_done; |
1888 | |
1889 | case 11: /* mulhwu */ |
1890 | asm("mulhwu %0,%1,%2" : "=r" (op->val) : |
1891 | "r" (regs->gpr[ra]), "r" (regs->gpr[rb])); |
1892 | goto arith_done; |
1893 | |
1894 | case 40: /* subf */ |
1895 | op->val = regs->gpr[rb] - regs->gpr[ra]; |
1896 | goto arith_done; |
1897 | #ifdef __powerpc64__ |
1898 | case 73: /* mulhd */ |
1899 | asm("mulhd %0,%1,%2" : "=r" (op->val) : |
1900 | "r" (regs->gpr[ra]), "r" (regs->gpr[rb])); |
1901 | goto arith_done; |
1902 | #endif |
1903 | case 75: /* mulhw */ |
1904 | asm("mulhw %0,%1,%2" : "=r" (op->val) : |
1905 | "r" (regs->gpr[ra]), "r" (regs->gpr[rb])); |
1906 | goto arith_done; |
1907 | |
1908 | case 104: /* neg */ |
1909 | op->val = -regs->gpr[ra]; |
1910 | goto arith_done; |
1911 | |
1912 | case 136: /* subfe */ |
1913 | add_with_carry(regs, op, rd, val1: ~regs->gpr[ra], |
1914 | val2: regs->gpr[rb], carry_in: regs->xer & XER_CA); |
1915 | goto arith_done; |
1916 | |
1917 | case 138: /* adde */ |
1918 | add_with_carry(regs, op, rd, val1: regs->gpr[ra], |
1919 | val2: regs->gpr[rb], carry_in: regs->xer & XER_CA); |
1920 | goto arith_done; |
1921 | |
1922 | case 200: /* subfze */ |
1923 | add_with_carry(regs, op, rd, val1: ~regs->gpr[ra], val2: 0L, |
1924 | carry_in: regs->xer & XER_CA); |
1925 | goto arith_done; |
1926 | |
1927 | case 202: /* addze */ |
1928 | add_with_carry(regs, op, rd, val1: regs->gpr[ra], val2: 0L, |
1929 | carry_in: regs->xer & XER_CA); |
1930 | goto arith_done; |
1931 | |
1932 | case 232: /* subfme */ |
1933 | add_with_carry(regs, op, rd, val1: ~regs->gpr[ra], val2: -1L, |
1934 | carry_in: regs->xer & XER_CA); |
1935 | goto arith_done; |
1936 | #ifdef __powerpc64__ |
1937 | case 233: /* mulld */ |
1938 | op->val = regs->gpr[ra] * regs->gpr[rb]; |
1939 | goto arith_done; |
1940 | #endif |
1941 | case 234: /* addme */ |
1942 | add_with_carry(regs, op, rd, val1: regs->gpr[ra], val2: -1L, |
1943 | carry_in: regs->xer & XER_CA); |
1944 | goto arith_done; |
1945 | |
1946 | case 235: /* mullw */ |
1947 | op->val = (long)(int) regs->gpr[ra] * |
1948 | (int) regs->gpr[rb]; |
1949 | |
1950 | goto arith_done; |
1951 | #ifdef __powerpc64__ |
1952 | case 265: /* modud */ |
1953 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
1954 | goto unknown_opcode; |
1955 | op->val = regs->gpr[ra] % regs->gpr[rb]; |
1956 | goto compute_done; |
1957 | #endif |
1958 | case 266: /* add */ |
1959 | op->val = regs->gpr[ra] + regs->gpr[rb]; |
1960 | goto arith_done; |
1961 | |
1962 | case 267: /* moduw */ |
1963 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
1964 | goto unknown_opcode; |
1965 | op->val = (unsigned int) regs->gpr[ra] % |
1966 | (unsigned int) regs->gpr[rb]; |
1967 | goto compute_done; |
1968 | #ifdef __powerpc64__ |
1969 | case 457: /* divdu */ |
1970 | op->val = regs->gpr[ra] / regs->gpr[rb]; |
1971 | goto arith_done; |
1972 | #endif |
1973 | case 459: /* divwu */ |
1974 | op->val = (unsigned int) regs->gpr[ra] / |
1975 | (unsigned int) regs->gpr[rb]; |
1976 | goto arith_done; |
1977 | #ifdef __powerpc64__ |
1978 | case 489: /* divd */ |
1979 | op->val = (long int) regs->gpr[ra] / |
1980 | (long int) regs->gpr[rb]; |
1981 | goto arith_done; |
1982 | #endif |
1983 | case 491: /* divw */ |
1984 | op->val = (int) regs->gpr[ra] / |
1985 | (int) regs->gpr[rb]; |
1986 | goto arith_done; |
1987 | #ifdef __powerpc64__ |
1988 | case 425: /* divde[.] */ |
1989 | asm volatile(PPC_DIVDE(%0, %1, %2) : |
1990 | "=r" (op->val) : "r" (regs->gpr[ra]), |
1991 | "r" (regs->gpr[rb])); |
1992 | goto arith_done; |
1993 | case 393: /* divdeu[.] */ |
1994 | asm volatile(PPC_DIVDEU(%0, %1, %2) : |
1995 | "=r" (op->val) : "r" (regs->gpr[ra]), |
1996 | "r" (regs->gpr[rb])); |
1997 | goto arith_done; |
1998 | #endif |
1999 | case 755: /* darn */ |
2000 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2001 | goto unknown_opcode; |
2002 | switch (ra & 0x3) { |
2003 | case 0: |
2004 | /* 32-bit conditioned */ |
2005 | asm volatile(PPC_DARN(%0, 0) : "=r" (op->val)); |
2006 | goto compute_done; |
2007 | |
2008 | case 1: |
2009 | /* 64-bit conditioned */ |
2010 | asm volatile(PPC_DARN(%0, 1) : "=r" (op->val)); |
2011 | goto compute_done; |
2012 | |
2013 | case 2: |
2014 | /* 64-bit raw */ |
2015 | asm volatile(PPC_DARN(%0, 2) : "=r" (op->val)); |
2016 | goto compute_done; |
2017 | } |
2018 | |
2019 | goto unknown_opcode; |
2020 | #ifdef __powerpc64__ |
2021 | case 777: /* modsd */ |
2022 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2023 | goto unknown_opcode; |
2024 | op->val = (long int) regs->gpr[ra] % |
2025 | (long int) regs->gpr[rb]; |
2026 | goto compute_done; |
2027 | #endif |
2028 | case 779: /* modsw */ |
2029 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2030 | goto unknown_opcode; |
2031 | op->val = (int) regs->gpr[ra] % |
2032 | (int) regs->gpr[rb]; |
2033 | goto compute_done; |
2034 | |
2035 | |
2036 | /* |
2037 | * Logical instructions |
2038 | */ |
2039 | case 26: /* cntlzw */ |
2040 | val = (unsigned int) regs->gpr[rd]; |
2041 | op->val = ( val ? __builtin_clz(val) : 32 ); |
2042 | goto logical_done; |
2043 | #ifdef __powerpc64__ |
2044 | case 58: /* cntlzd */ |
2045 | val = regs->gpr[rd]; |
2046 | op->val = ( val ? __builtin_clzl(val) : 64 ); |
2047 | goto logical_done; |
2048 | #endif |
2049 | case 28: /* and */ |
2050 | op->val = regs->gpr[rd] & regs->gpr[rb]; |
2051 | goto logical_done; |
2052 | |
2053 | case 60: /* andc */ |
2054 | op->val = regs->gpr[rd] & ~regs->gpr[rb]; |
2055 | goto logical_done; |
2056 | |
2057 | case 122: /* popcntb */ |
2058 | do_popcnt(regs, op, v1: regs->gpr[rd], size: 8); |
2059 | goto logical_done_nocc; |
2060 | |
2061 | case 124: /* nor */ |
2062 | op->val = ~(regs->gpr[rd] | regs->gpr[rb]); |
2063 | goto logical_done; |
2064 | |
2065 | case 154: /* prtyw */ |
2066 | do_prty(regs, op, v: regs->gpr[rd], size: 32); |
2067 | goto logical_done_nocc; |
2068 | |
2069 | case 186: /* prtyd */ |
2070 | do_prty(regs, op, v: regs->gpr[rd], size: 64); |
2071 | goto logical_done_nocc; |
2072 | #ifdef CONFIG_PPC64 |
2073 | case 252: /* bpermd */ |
2074 | do_bpermd(regs, op, regs->gpr[rd], regs->gpr[rb]); |
2075 | goto logical_done_nocc; |
2076 | #endif |
2077 | case 284: /* xor */ |
2078 | op->val = ~(regs->gpr[rd] ^ regs->gpr[rb]); |
2079 | goto logical_done; |
2080 | |
2081 | case 316: /* xor */ |
2082 | op->val = regs->gpr[rd] ^ regs->gpr[rb]; |
2083 | goto logical_done; |
2084 | |
2085 | case 378: /* popcntw */ |
2086 | do_popcnt(regs, op, v1: regs->gpr[rd], size: 32); |
2087 | goto logical_done_nocc; |
2088 | |
2089 | case 412: /* orc */ |
2090 | op->val = regs->gpr[rd] | ~regs->gpr[rb]; |
2091 | goto logical_done; |
2092 | |
2093 | case 444: /* or */ |
2094 | op->val = regs->gpr[rd] | regs->gpr[rb]; |
2095 | goto logical_done; |
2096 | |
2097 | case 476: /* nand */ |
2098 | op->val = ~(regs->gpr[rd] & regs->gpr[rb]); |
2099 | goto logical_done; |
2100 | #ifdef CONFIG_PPC64 |
2101 | case 506: /* popcntd */ |
2102 | do_popcnt(regs, op, regs->gpr[rd], 64); |
2103 | goto logical_done_nocc; |
2104 | #endif |
2105 | case 538: /* cnttzw */ |
2106 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2107 | goto unknown_opcode; |
2108 | val = (unsigned int) regs->gpr[rd]; |
2109 | op->val = (val ? __builtin_ctz(val) : 32); |
2110 | goto logical_done; |
2111 | #ifdef __powerpc64__ |
2112 | case 570: /* cnttzd */ |
2113 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2114 | goto unknown_opcode; |
2115 | val = regs->gpr[rd]; |
2116 | op->val = (val ? __builtin_ctzl(val) : 64); |
2117 | goto logical_done; |
2118 | #endif |
2119 | case 922: /* extsh */ |
2120 | op->val = (signed short) regs->gpr[rd]; |
2121 | goto logical_done; |
2122 | |
2123 | case 954: /* extsb */ |
2124 | op->val = (signed char) regs->gpr[rd]; |
2125 | goto logical_done; |
2126 | #ifdef __powerpc64__ |
2127 | case 986: /* extsw */ |
2128 | op->val = (signed int) regs->gpr[rd]; |
2129 | goto logical_done; |
2130 | #endif |
2131 | |
2132 | /* |
2133 | * Shift instructions |
2134 | */ |
2135 | case 24: /* slw */ |
2136 | sh = regs->gpr[rb] & 0x3f; |
2137 | if (sh < 32) |
2138 | op->val = (regs->gpr[rd] << sh) & 0xffffffffUL; |
2139 | else |
2140 | op->val = 0; |
2141 | goto logical_done; |
2142 | |
2143 | case 536: /* srw */ |
2144 | sh = regs->gpr[rb] & 0x3f; |
2145 | if (sh < 32) |
2146 | op->val = (regs->gpr[rd] & 0xffffffffUL) >> sh; |
2147 | else |
2148 | op->val = 0; |
2149 | goto logical_done; |
2150 | |
2151 | case 792: /* sraw */ |
2152 | op->type = COMPUTE + SETREG + SETXER; |
2153 | sh = regs->gpr[rb] & 0x3f; |
2154 | ival = (signed int) regs->gpr[rd]; |
2155 | op->val = ival >> (sh < 32 ? sh : 31); |
2156 | op->xerval = regs->xer; |
2157 | if (ival < 0 && (sh >= 32 || (ival & ((1ul << sh) - 1)) != 0)) |
2158 | op->xerval |= XER_CA; |
2159 | else |
2160 | op->xerval &= ~XER_CA; |
2161 | set_ca32(op, val: op->xerval & XER_CA); |
2162 | goto logical_done; |
2163 | |
2164 | case 824: /* srawi */ |
2165 | op->type = COMPUTE + SETREG + SETXER; |
2166 | sh = rb; |
2167 | ival = (signed int) regs->gpr[rd]; |
2168 | op->val = ival >> sh; |
2169 | op->xerval = regs->xer; |
2170 | if (ival < 0 && (ival & ((1ul << sh) - 1)) != 0) |
2171 | op->xerval |= XER_CA; |
2172 | else |
2173 | op->xerval &= ~XER_CA; |
2174 | set_ca32(op, val: op->xerval & XER_CA); |
2175 | goto logical_done; |
2176 | |
2177 | #ifdef __powerpc64__ |
2178 | case 27: /* sld */ |
2179 | sh = regs->gpr[rb] & 0x7f; |
2180 | if (sh < 64) |
2181 | op->val = regs->gpr[rd] << sh; |
2182 | else |
2183 | op->val = 0; |
2184 | goto logical_done; |
2185 | |
2186 | case 539: /* srd */ |
2187 | sh = regs->gpr[rb] & 0x7f; |
2188 | if (sh < 64) |
2189 | op->val = regs->gpr[rd] >> sh; |
2190 | else |
2191 | op->val = 0; |
2192 | goto logical_done; |
2193 | |
2194 | case 794: /* srad */ |
2195 | op->type = COMPUTE + SETREG + SETXER; |
2196 | sh = regs->gpr[rb] & 0x7f; |
2197 | ival = (signed long int) regs->gpr[rd]; |
2198 | op->val = ival >> (sh < 64 ? sh : 63); |
2199 | op->xerval = regs->xer; |
2200 | if (ival < 0 && (sh >= 64 || (ival & ((1ul << sh) - 1)) != 0)) |
2201 | op->xerval |= XER_CA; |
2202 | else |
2203 | op->xerval &= ~XER_CA; |
2204 | set_ca32(op, op->xerval & XER_CA); |
2205 | goto logical_done; |
2206 | |
2207 | case 826: /* sradi with sh_5 = 0 */ |
2208 | case 827: /* sradi with sh_5 = 1 */ |
2209 | op->type = COMPUTE + SETREG + SETXER; |
2210 | sh = rb | ((word & 2) << 4); |
2211 | ival = (signed long int) regs->gpr[rd]; |
2212 | op->val = ival >> sh; |
2213 | op->xerval = regs->xer; |
2214 | if (ival < 0 && (ival & ((1ul << sh) - 1)) != 0) |
2215 | op->xerval |= XER_CA; |
2216 | else |
2217 | op->xerval &= ~XER_CA; |
2218 | set_ca32(op, op->xerval & XER_CA); |
2219 | goto logical_done; |
2220 | |
2221 | case 890: /* extswsli with sh_5 = 0 */ |
2222 | case 891: /* extswsli with sh_5 = 1 */ |
2223 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2224 | goto unknown_opcode; |
2225 | op->type = COMPUTE + SETREG; |
2226 | sh = rb | ((word & 2) << 4); |
2227 | val = (signed int) regs->gpr[rd]; |
2228 | if (sh) |
2229 | op->val = ROTATE(val, sh) & MASK64(0, 63 - sh); |
2230 | else |
2231 | op->val = val; |
2232 | goto logical_done; |
2233 | |
2234 | #endif /* __powerpc64__ */ |
2235 | |
2236 | /* |
2237 | * Cache instructions |
2238 | */ |
2239 | case 54: /* dcbst */ |
2240 | op->type = MKOP(CACHEOP, DCBST, 0); |
2241 | op->ea = xform_ea(instr: word, regs); |
2242 | return 0; |
2243 | |
2244 | case 86: /* dcbf */ |
2245 | op->type = MKOP(CACHEOP, DCBF, 0); |
2246 | op->ea = xform_ea(instr: word, regs); |
2247 | return 0; |
2248 | |
2249 | case 246: /* dcbtst */ |
2250 | op->type = MKOP(CACHEOP, DCBTST, 0); |
2251 | op->ea = xform_ea(instr: word, regs); |
2252 | op->reg = rd; |
2253 | return 0; |
2254 | |
2255 | case 278: /* dcbt */ |
2256 | op->type = MKOP(CACHEOP, DCBTST, 0); |
2257 | op->ea = xform_ea(instr: word, regs); |
2258 | op->reg = rd; |
2259 | return 0; |
2260 | |
2261 | case 982: /* icbi */ |
2262 | op->type = MKOP(CACHEOP, ICBI, 0); |
2263 | op->ea = xform_ea(instr: word, regs); |
2264 | return 0; |
2265 | |
2266 | case 1014: /* dcbz */ |
2267 | op->type = MKOP(CACHEOP, DCBZ, 0); |
2268 | op->ea = xform_ea(instr: word, regs); |
2269 | return 0; |
2270 | } |
2271 | break; |
2272 | } |
2273 | |
2274 | /* |
2275 | * Loads and stores. |
2276 | */ |
2277 | op->type = UNKNOWN; |
2278 | op->update_reg = ra; |
2279 | op->reg = rd; |
2280 | op->val = regs->gpr[rd]; |
2281 | u = (word >> 20) & UPDATE; |
2282 | op->vsx_flags = 0; |
2283 | |
2284 | switch (opcode) { |
2285 | case 31: |
2286 | u = word & UPDATE; |
2287 | op->ea = xform_ea(instr: word, regs); |
2288 | switch ((word >> 1) & 0x3ff) { |
2289 | case 20: /* lwarx */ |
2290 | op->type = MKOP(LARX, 0, 4); |
2291 | break; |
2292 | |
2293 | case 150: /* stwcx. */ |
2294 | op->type = MKOP(STCX, 0, 4); |
2295 | break; |
2296 | |
2297 | #ifdef CONFIG_PPC_HAS_LBARX_LHARX |
2298 | case 52: /* lbarx */ |
2299 | op->type = MKOP(LARX, 0, 1); |
2300 | break; |
2301 | |
2302 | case 694: /* stbcx. */ |
2303 | op->type = MKOP(STCX, 0, 1); |
2304 | break; |
2305 | |
2306 | case 116: /* lharx */ |
2307 | op->type = MKOP(LARX, 0, 2); |
2308 | break; |
2309 | |
2310 | case 726: /* sthcx. */ |
2311 | op->type = MKOP(STCX, 0, 2); |
2312 | break; |
2313 | #endif |
2314 | #ifdef __powerpc64__ |
2315 | case 84: /* ldarx */ |
2316 | op->type = MKOP(LARX, 0, 8); |
2317 | break; |
2318 | |
2319 | case 214: /* stdcx. */ |
2320 | op->type = MKOP(STCX, 0, 8); |
2321 | break; |
2322 | |
2323 | case 276: /* lqarx */ |
2324 | if (!((rd & 1) || rd == ra || rd == rb)) |
2325 | op->type = MKOP(LARX, 0, 16); |
2326 | break; |
2327 | |
2328 | case 182: /* stqcx. */ |
2329 | if (!(rd & 1)) |
2330 | op->type = MKOP(STCX, 0, 16); |
2331 | break; |
2332 | #endif |
2333 | |
2334 | case 23: /* lwzx */ |
2335 | case 55: /* lwzux */ |
2336 | op->type = MKOP(LOAD, u, 4); |
2337 | break; |
2338 | |
2339 | case 87: /* lbzx */ |
2340 | case 119: /* lbzux */ |
2341 | op->type = MKOP(LOAD, u, 1); |
2342 | break; |
2343 | |
2344 | #ifdef CONFIG_ALTIVEC |
2345 | /* |
2346 | * Note: for the load/store vector element instructions, |
2347 | * bits of the EA say which field of the VMX register to use. |
2348 | */ |
2349 | case 7: /* lvebx */ |
2350 | op->type = MKOP(LOAD_VMX, 0, 1); |
2351 | op->element_size = 1; |
2352 | break; |
2353 | |
2354 | case 39: /* lvehx */ |
2355 | op->type = MKOP(LOAD_VMX, 0, 2); |
2356 | op->element_size = 2; |
2357 | break; |
2358 | |
2359 | case 71: /* lvewx */ |
2360 | op->type = MKOP(LOAD_VMX, 0, 4); |
2361 | op->element_size = 4; |
2362 | break; |
2363 | |
2364 | case 103: /* lvx */ |
2365 | case 359: /* lvxl */ |
2366 | op->type = MKOP(LOAD_VMX, 0, 16); |
2367 | op->element_size = 16; |
2368 | break; |
2369 | |
2370 | case 135: /* stvebx */ |
2371 | op->type = MKOP(STORE_VMX, 0, 1); |
2372 | op->element_size = 1; |
2373 | break; |
2374 | |
2375 | case 167: /* stvehx */ |
2376 | op->type = MKOP(STORE_VMX, 0, 2); |
2377 | op->element_size = 2; |
2378 | break; |
2379 | |
2380 | case 199: /* stvewx */ |
2381 | op->type = MKOP(STORE_VMX, 0, 4); |
2382 | op->element_size = 4; |
2383 | break; |
2384 | |
2385 | case 231: /* stvx */ |
2386 | case 487: /* stvxl */ |
2387 | op->type = MKOP(STORE_VMX, 0, 16); |
2388 | break; |
2389 | #endif /* CONFIG_ALTIVEC */ |
2390 | |
2391 | #ifdef __powerpc64__ |
2392 | case 21: /* ldx */ |
2393 | case 53: /* ldux */ |
2394 | op->type = MKOP(LOAD, u, 8); |
2395 | break; |
2396 | |
2397 | case 149: /* stdx */ |
2398 | case 181: /* stdux */ |
2399 | op->type = MKOP(STORE, u, 8); |
2400 | break; |
2401 | #endif |
2402 | |
2403 | case 151: /* stwx */ |
2404 | case 183: /* stwux */ |
2405 | op->type = MKOP(STORE, u, 4); |
2406 | break; |
2407 | |
2408 | case 215: /* stbx */ |
2409 | case 247: /* stbux */ |
2410 | op->type = MKOP(STORE, u, 1); |
2411 | break; |
2412 | |
2413 | case 279: /* lhzx */ |
2414 | case 311: /* lhzux */ |
2415 | op->type = MKOP(LOAD, u, 2); |
2416 | break; |
2417 | |
2418 | #ifdef __powerpc64__ |
2419 | case 341: /* lwax */ |
2420 | case 373: /* lwaux */ |
2421 | op->type = MKOP(LOAD, SIGNEXT | u, 4); |
2422 | break; |
2423 | #endif |
2424 | |
2425 | case 343: /* lhax */ |
2426 | case 375: /* lhaux */ |
2427 | op->type = MKOP(LOAD, SIGNEXT | u, 2); |
2428 | break; |
2429 | |
2430 | case 407: /* sthx */ |
2431 | case 439: /* sthux */ |
2432 | op->type = MKOP(STORE, u, 2); |
2433 | break; |
2434 | |
2435 | #ifdef __powerpc64__ |
2436 | case 532: /* ldbrx */ |
2437 | op->type = MKOP(LOAD, BYTEREV, 8); |
2438 | break; |
2439 | |
2440 | #endif |
2441 | case 533: /* lswx */ |
2442 | op->type = MKOP(LOAD_MULTI, 0, regs->xer & 0x7f); |
2443 | break; |
2444 | |
2445 | case 534: /* lwbrx */ |
2446 | op->type = MKOP(LOAD, BYTEREV, 4); |
2447 | break; |
2448 | |
2449 | case 597: /* lswi */ |
2450 | if (rb == 0) |
2451 | rb = 32; /* # bytes to load */ |
2452 | op->type = MKOP(LOAD_MULTI, 0, rb); |
2453 | op->ea = ra ? regs->gpr[ra] : 0; |
2454 | break; |
2455 | |
2456 | #ifdef CONFIG_PPC_FPU |
2457 | case 535: /* lfsx */ |
2458 | case 567: /* lfsux */ |
2459 | op->type = MKOP(LOAD_FP, u | FPCONV, 4); |
2460 | break; |
2461 | |
2462 | case 599: /* lfdx */ |
2463 | case 631: /* lfdux */ |
2464 | op->type = MKOP(LOAD_FP, u, 8); |
2465 | break; |
2466 | |
2467 | case 663: /* stfsx */ |
2468 | case 695: /* stfsux */ |
2469 | op->type = MKOP(STORE_FP, u | FPCONV, 4); |
2470 | break; |
2471 | |
2472 | case 727: /* stfdx */ |
2473 | case 759: /* stfdux */ |
2474 | op->type = MKOP(STORE_FP, u, 8); |
2475 | break; |
2476 | |
2477 | #ifdef __powerpc64__ |
2478 | case 791: /* lfdpx */ |
2479 | op->type = MKOP(LOAD_FP, 0, 16); |
2480 | break; |
2481 | |
2482 | case 855: /* lfiwax */ |
2483 | op->type = MKOP(LOAD_FP, SIGNEXT, 4); |
2484 | break; |
2485 | |
2486 | case 887: /* lfiwzx */ |
2487 | op->type = MKOP(LOAD_FP, 0, 4); |
2488 | break; |
2489 | |
2490 | case 919: /* stfdpx */ |
2491 | op->type = MKOP(STORE_FP, 0, 16); |
2492 | break; |
2493 | |
2494 | case 983: /* stfiwx */ |
2495 | op->type = MKOP(STORE_FP, 0, 4); |
2496 | break; |
2497 | #endif /* __powerpc64 */ |
2498 | #endif /* CONFIG_PPC_FPU */ |
2499 | |
2500 | #ifdef __powerpc64__ |
2501 | case 660: /* stdbrx */ |
2502 | op->type = MKOP(STORE, BYTEREV, 8); |
2503 | op->val = byterev_8(regs->gpr[rd]); |
2504 | break; |
2505 | |
2506 | #endif |
2507 | case 661: /* stswx */ |
2508 | op->type = MKOP(STORE_MULTI, 0, regs->xer & 0x7f); |
2509 | break; |
2510 | |
2511 | case 662: /* stwbrx */ |
2512 | op->type = MKOP(STORE, BYTEREV, 4); |
2513 | op->val = byterev_4(x: regs->gpr[rd]); |
2514 | break; |
2515 | |
2516 | case 725: /* stswi */ |
2517 | if (rb == 0) |
2518 | rb = 32; /* # bytes to store */ |
2519 | op->type = MKOP(STORE_MULTI, 0, rb); |
2520 | op->ea = ra ? regs->gpr[ra] : 0; |
2521 | break; |
2522 | |
2523 | case 790: /* lhbrx */ |
2524 | op->type = MKOP(LOAD, BYTEREV, 2); |
2525 | break; |
2526 | |
2527 | case 918: /* sthbrx */ |
2528 | op->type = MKOP(STORE, BYTEREV, 2); |
2529 | op->val = byterev_2(x: regs->gpr[rd]); |
2530 | break; |
2531 | |
2532 | #ifdef CONFIG_VSX |
2533 | case 12: /* lxsiwzx */ |
2534 | op->reg = rd | ((word & 1) << 5); |
2535 | op->type = MKOP(LOAD_VSX, 0, 4); |
2536 | op->element_size = 8; |
2537 | break; |
2538 | |
2539 | case 76: /* lxsiwax */ |
2540 | op->reg = rd | ((word & 1) << 5); |
2541 | op->type = MKOP(LOAD_VSX, SIGNEXT, 4); |
2542 | op->element_size = 8; |
2543 | break; |
2544 | |
2545 | case 140: /* stxsiwx */ |
2546 | op->reg = rd | ((word & 1) << 5); |
2547 | op->type = MKOP(STORE_VSX, 0, 4); |
2548 | op->element_size = 8; |
2549 | break; |
2550 | |
2551 | case 268: /* lxvx */ |
2552 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2553 | goto unknown_opcode; |
2554 | op->reg = rd | ((word & 1) << 5); |
2555 | op->type = MKOP(LOAD_VSX, 0, 16); |
2556 | op->element_size = 16; |
2557 | op->vsx_flags = VSX_CHECK_VEC; |
2558 | break; |
2559 | |
2560 | case 269: /* lxvl */ |
2561 | case 301: { /* lxvll */ |
2562 | int nb; |
2563 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2564 | goto unknown_opcode; |
2565 | op->reg = rd | ((word & 1) << 5); |
2566 | op->ea = ra ? regs->gpr[ra] : 0; |
2567 | nb = regs->gpr[rb] & 0xff; |
2568 | if (nb > 16) |
2569 | nb = 16; |
2570 | op->type = MKOP(LOAD_VSX, 0, nb); |
2571 | op->element_size = 16; |
2572 | op->vsx_flags = ((word & 0x20) ? VSX_LDLEFT : 0) | |
2573 | VSX_CHECK_VEC; |
2574 | break; |
2575 | } |
2576 | case 332: /* lxvdsx */ |
2577 | op->reg = rd | ((word & 1) << 5); |
2578 | op->type = MKOP(LOAD_VSX, 0, 8); |
2579 | op->element_size = 8; |
2580 | op->vsx_flags = VSX_SPLAT; |
2581 | break; |
2582 | |
2583 | case 333: /* lxvpx */ |
2584 | if (!cpu_has_feature(CPU_FTR_ARCH_31)) |
2585 | goto unknown_opcode; |
2586 | op->reg = VSX_REGISTER_XTP(rd); |
2587 | op->type = MKOP(LOAD_VSX, 0, 32); |
2588 | op->element_size = 32; |
2589 | break; |
2590 | |
2591 | case 364: /* lxvwsx */ |
2592 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2593 | goto unknown_opcode; |
2594 | op->reg = rd | ((word & 1) << 5); |
2595 | op->type = MKOP(LOAD_VSX, 0, 4); |
2596 | op->element_size = 4; |
2597 | op->vsx_flags = VSX_SPLAT | VSX_CHECK_VEC; |
2598 | break; |
2599 | |
2600 | case 396: /* stxvx */ |
2601 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2602 | goto unknown_opcode; |
2603 | op->reg = rd | ((word & 1) << 5); |
2604 | op->type = MKOP(STORE_VSX, 0, 16); |
2605 | op->element_size = 16; |
2606 | op->vsx_flags = VSX_CHECK_VEC; |
2607 | break; |
2608 | |
2609 | case 397: /* stxvl */ |
2610 | case 429: { /* stxvll */ |
2611 | int nb; |
2612 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2613 | goto unknown_opcode; |
2614 | op->reg = rd | ((word & 1) << 5); |
2615 | op->ea = ra ? regs->gpr[ra] : 0; |
2616 | nb = regs->gpr[rb] & 0xff; |
2617 | if (nb > 16) |
2618 | nb = 16; |
2619 | op->type = MKOP(STORE_VSX, 0, nb); |
2620 | op->element_size = 16; |
2621 | op->vsx_flags = ((word & 0x20) ? VSX_LDLEFT : 0) | |
2622 | VSX_CHECK_VEC; |
2623 | break; |
2624 | } |
2625 | case 461: /* stxvpx */ |
2626 | if (!cpu_has_feature(CPU_FTR_ARCH_31)) |
2627 | goto unknown_opcode; |
2628 | op->reg = VSX_REGISTER_XTP(rd); |
2629 | op->type = MKOP(STORE_VSX, 0, 32); |
2630 | op->element_size = 32; |
2631 | break; |
2632 | case 524: /* lxsspx */ |
2633 | op->reg = rd | ((word & 1) << 5); |
2634 | op->type = MKOP(LOAD_VSX, 0, 4); |
2635 | op->element_size = 8; |
2636 | op->vsx_flags = VSX_FPCONV; |
2637 | break; |
2638 | |
2639 | case 588: /* lxsdx */ |
2640 | op->reg = rd | ((word & 1) << 5); |
2641 | op->type = MKOP(LOAD_VSX, 0, 8); |
2642 | op->element_size = 8; |
2643 | break; |
2644 | |
2645 | case 652: /* stxsspx */ |
2646 | op->reg = rd | ((word & 1) << 5); |
2647 | op->type = MKOP(STORE_VSX, 0, 4); |
2648 | op->element_size = 8; |
2649 | op->vsx_flags = VSX_FPCONV; |
2650 | break; |
2651 | |
2652 | case 716: /* stxsdx */ |
2653 | op->reg = rd | ((word & 1) << 5); |
2654 | op->type = MKOP(STORE_VSX, 0, 8); |
2655 | op->element_size = 8; |
2656 | break; |
2657 | |
2658 | case 780: /* lxvw4x */ |
2659 | op->reg = rd | ((word & 1) << 5); |
2660 | op->type = MKOP(LOAD_VSX, 0, 16); |
2661 | op->element_size = 4; |
2662 | break; |
2663 | |
2664 | case 781: /* lxsibzx */ |
2665 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2666 | goto unknown_opcode; |
2667 | op->reg = rd | ((word & 1) << 5); |
2668 | op->type = MKOP(LOAD_VSX, 0, 1); |
2669 | op->element_size = 8; |
2670 | op->vsx_flags = VSX_CHECK_VEC; |
2671 | break; |
2672 | |
2673 | case 812: /* lxvh8x */ |
2674 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2675 | goto unknown_opcode; |
2676 | op->reg = rd | ((word & 1) << 5); |
2677 | op->type = MKOP(LOAD_VSX, 0, 16); |
2678 | op->element_size = 2; |
2679 | op->vsx_flags = VSX_CHECK_VEC; |
2680 | break; |
2681 | |
2682 | case 813: /* lxsihzx */ |
2683 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2684 | goto unknown_opcode; |
2685 | op->reg = rd | ((word & 1) << 5); |
2686 | op->type = MKOP(LOAD_VSX, 0, 2); |
2687 | op->element_size = 8; |
2688 | op->vsx_flags = VSX_CHECK_VEC; |
2689 | break; |
2690 | |
2691 | case 844: /* lxvd2x */ |
2692 | op->reg = rd | ((word & 1) << 5); |
2693 | op->type = MKOP(LOAD_VSX, 0, 16); |
2694 | op->element_size = 8; |
2695 | break; |
2696 | |
2697 | case 876: /* lxvb16x */ |
2698 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2699 | goto unknown_opcode; |
2700 | op->reg = rd | ((word & 1) << 5); |
2701 | op->type = MKOP(LOAD_VSX, 0, 16); |
2702 | op->element_size = 1; |
2703 | op->vsx_flags = VSX_CHECK_VEC; |
2704 | break; |
2705 | |
2706 | case 908: /* stxvw4x */ |
2707 | op->reg = rd | ((word & 1) << 5); |
2708 | op->type = MKOP(STORE_VSX, 0, 16); |
2709 | op->element_size = 4; |
2710 | break; |
2711 | |
2712 | case 909: /* stxsibx */ |
2713 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2714 | goto unknown_opcode; |
2715 | op->reg = rd | ((word & 1) << 5); |
2716 | op->type = MKOP(STORE_VSX, 0, 1); |
2717 | op->element_size = 8; |
2718 | op->vsx_flags = VSX_CHECK_VEC; |
2719 | break; |
2720 | |
2721 | case 940: /* stxvh8x */ |
2722 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2723 | goto unknown_opcode; |
2724 | op->reg = rd | ((word & 1) << 5); |
2725 | op->type = MKOP(STORE_VSX, 0, 16); |
2726 | op->element_size = 2; |
2727 | op->vsx_flags = VSX_CHECK_VEC; |
2728 | break; |
2729 | |
2730 | case 941: /* stxsihx */ |
2731 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2732 | goto unknown_opcode; |
2733 | op->reg = rd | ((word & 1) << 5); |
2734 | op->type = MKOP(STORE_VSX, 0, 2); |
2735 | op->element_size = 8; |
2736 | op->vsx_flags = VSX_CHECK_VEC; |
2737 | break; |
2738 | |
2739 | case 972: /* stxvd2x */ |
2740 | op->reg = rd | ((word & 1) << 5); |
2741 | op->type = MKOP(STORE_VSX, 0, 16); |
2742 | op->element_size = 8; |
2743 | break; |
2744 | |
2745 | case 1004: /* stxvb16x */ |
2746 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2747 | goto unknown_opcode; |
2748 | op->reg = rd | ((word & 1) << 5); |
2749 | op->type = MKOP(STORE_VSX, 0, 16); |
2750 | op->element_size = 1; |
2751 | op->vsx_flags = VSX_CHECK_VEC; |
2752 | break; |
2753 | |
2754 | #endif /* CONFIG_VSX */ |
2755 | } |
2756 | break; |
2757 | |
2758 | case 32: /* lwz */ |
2759 | case 33: /* lwzu */ |
2760 | op->type = MKOP(LOAD, u, 4); |
2761 | op->ea = dform_ea(instr: word, regs); |
2762 | break; |
2763 | |
2764 | case 34: /* lbz */ |
2765 | case 35: /* lbzu */ |
2766 | op->type = MKOP(LOAD, u, 1); |
2767 | op->ea = dform_ea(instr: word, regs); |
2768 | break; |
2769 | |
2770 | case 36: /* stw */ |
2771 | case 37: /* stwu */ |
2772 | op->type = MKOP(STORE, u, 4); |
2773 | op->ea = dform_ea(instr: word, regs); |
2774 | break; |
2775 | |
2776 | case 38: /* stb */ |
2777 | case 39: /* stbu */ |
2778 | op->type = MKOP(STORE, u, 1); |
2779 | op->ea = dform_ea(instr: word, regs); |
2780 | break; |
2781 | |
2782 | case 40: /* lhz */ |
2783 | case 41: /* lhzu */ |
2784 | op->type = MKOP(LOAD, u, 2); |
2785 | op->ea = dform_ea(instr: word, regs); |
2786 | break; |
2787 | |
2788 | case 42: /* lha */ |
2789 | case 43: /* lhau */ |
2790 | op->type = MKOP(LOAD, SIGNEXT | u, 2); |
2791 | op->ea = dform_ea(instr: word, regs); |
2792 | break; |
2793 | |
2794 | case 44: /* sth */ |
2795 | case 45: /* sthu */ |
2796 | op->type = MKOP(STORE, u, 2); |
2797 | op->ea = dform_ea(instr: word, regs); |
2798 | break; |
2799 | |
2800 | case 46: /* lmw */ |
2801 | if (ra >= rd) |
2802 | break; /* invalid form, ra in range to load */ |
2803 | op->type = MKOP(LOAD_MULTI, 0, 4 * (32 - rd)); |
2804 | op->ea = dform_ea(instr: word, regs); |
2805 | break; |
2806 | |
2807 | case 47: /* stmw */ |
2808 | op->type = MKOP(STORE_MULTI, 0, 4 * (32 - rd)); |
2809 | op->ea = dform_ea(instr: word, regs); |
2810 | break; |
2811 | |
2812 | #ifdef CONFIG_PPC_FPU |
2813 | case 48: /* lfs */ |
2814 | case 49: /* lfsu */ |
2815 | op->type = MKOP(LOAD_FP, u | FPCONV, 4); |
2816 | op->ea = dform_ea(word, regs); |
2817 | break; |
2818 | |
2819 | case 50: /* lfd */ |
2820 | case 51: /* lfdu */ |
2821 | op->type = MKOP(LOAD_FP, u, 8); |
2822 | op->ea = dform_ea(word, regs); |
2823 | break; |
2824 | |
2825 | case 52: /* stfs */ |
2826 | case 53: /* stfsu */ |
2827 | op->type = MKOP(STORE_FP, u | FPCONV, 4); |
2828 | op->ea = dform_ea(word, regs); |
2829 | break; |
2830 | |
2831 | case 54: /* stfd */ |
2832 | case 55: /* stfdu */ |
2833 | op->type = MKOP(STORE_FP, u, 8); |
2834 | op->ea = dform_ea(word, regs); |
2835 | break; |
2836 | #endif |
2837 | |
2838 | #ifdef __powerpc64__ |
2839 | case 56: /* lq */ |
2840 | if (!((rd & 1) || (rd == ra))) |
2841 | op->type = MKOP(LOAD, 0, 16); |
2842 | op->ea = dqform_ea(word, regs); |
2843 | break; |
2844 | #endif |
2845 | |
2846 | #ifdef CONFIG_VSX |
2847 | case 57: /* lfdp, lxsd, lxssp */ |
2848 | op->ea = dsform_ea(word, regs); |
2849 | switch (word & 3) { |
2850 | case 0: /* lfdp */ |
2851 | if (rd & 1) |
2852 | break; /* reg must be even */ |
2853 | op->type = MKOP(LOAD_FP, 0, 16); |
2854 | break; |
2855 | case 2: /* lxsd */ |
2856 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2857 | goto unknown_opcode; |
2858 | op->reg = rd + 32; |
2859 | op->type = MKOP(LOAD_VSX, 0, 8); |
2860 | op->element_size = 8; |
2861 | op->vsx_flags = VSX_CHECK_VEC; |
2862 | break; |
2863 | case 3: /* lxssp */ |
2864 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2865 | goto unknown_opcode; |
2866 | op->reg = rd + 32; |
2867 | op->type = MKOP(LOAD_VSX, 0, 4); |
2868 | op->element_size = 8; |
2869 | op->vsx_flags = VSX_FPCONV | VSX_CHECK_VEC; |
2870 | break; |
2871 | } |
2872 | break; |
2873 | #endif /* CONFIG_VSX */ |
2874 | |
2875 | #ifdef __powerpc64__ |
2876 | case 58: /* ld[u], lwa */ |
2877 | op->ea = dsform_ea(word, regs); |
2878 | switch (word & 3) { |
2879 | case 0: /* ld */ |
2880 | op->type = MKOP(LOAD, 0, 8); |
2881 | break; |
2882 | case 1: /* ldu */ |
2883 | op->type = MKOP(LOAD, UPDATE, 8); |
2884 | break; |
2885 | case 2: /* lwa */ |
2886 | op->type = MKOP(LOAD, SIGNEXT, 4); |
2887 | break; |
2888 | } |
2889 | break; |
2890 | #endif |
2891 | |
2892 | #ifdef CONFIG_VSX |
2893 | case 6: |
2894 | if (!cpu_has_feature(CPU_FTR_ARCH_31)) |
2895 | goto unknown_opcode; |
2896 | op->ea = dqform_ea(word, regs); |
2897 | op->reg = VSX_REGISTER_XTP(rd); |
2898 | op->element_size = 32; |
2899 | switch (word & 0xf) { |
2900 | case 0: /* lxvp */ |
2901 | op->type = MKOP(LOAD_VSX, 0, 32); |
2902 | break; |
2903 | case 1: /* stxvp */ |
2904 | op->type = MKOP(STORE_VSX, 0, 32); |
2905 | break; |
2906 | } |
2907 | break; |
2908 | |
2909 | case 61: /* stfdp, lxv, stxsd, stxssp, stxv */ |
2910 | switch (word & 7) { |
2911 | case 0: /* stfdp with LSB of DS field = 0 */ |
2912 | case 4: /* stfdp with LSB of DS field = 1 */ |
2913 | op->ea = dsform_ea(word, regs); |
2914 | op->type = MKOP(STORE_FP, 0, 16); |
2915 | break; |
2916 | |
2917 | case 1: /* lxv */ |
2918 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2919 | goto unknown_opcode; |
2920 | op->ea = dqform_ea(word, regs); |
2921 | if (word & 8) |
2922 | op->reg = rd + 32; |
2923 | op->type = MKOP(LOAD_VSX, 0, 16); |
2924 | op->element_size = 16; |
2925 | op->vsx_flags = VSX_CHECK_VEC; |
2926 | break; |
2927 | |
2928 | case 2: /* stxsd with LSB of DS field = 0 */ |
2929 | case 6: /* stxsd with LSB of DS field = 1 */ |
2930 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2931 | goto unknown_opcode; |
2932 | op->ea = dsform_ea(word, regs); |
2933 | op->reg = rd + 32; |
2934 | op->type = MKOP(STORE_VSX, 0, 8); |
2935 | op->element_size = 8; |
2936 | op->vsx_flags = VSX_CHECK_VEC; |
2937 | break; |
2938 | |
2939 | case 3: /* stxssp with LSB of DS field = 0 */ |
2940 | case 7: /* stxssp with LSB of DS field = 1 */ |
2941 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2942 | goto unknown_opcode; |
2943 | op->ea = dsform_ea(word, regs); |
2944 | op->reg = rd + 32; |
2945 | op->type = MKOP(STORE_VSX, 0, 4); |
2946 | op->element_size = 8; |
2947 | op->vsx_flags = VSX_FPCONV | VSX_CHECK_VEC; |
2948 | break; |
2949 | |
2950 | case 5: /* stxv */ |
2951 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
2952 | goto unknown_opcode; |
2953 | op->ea = dqform_ea(word, regs); |
2954 | if (word & 8) |
2955 | op->reg = rd + 32; |
2956 | op->type = MKOP(STORE_VSX, 0, 16); |
2957 | op->element_size = 16; |
2958 | op->vsx_flags = VSX_CHECK_VEC; |
2959 | break; |
2960 | } |
2961 | break; |
2962 | #endif /* CONFIG_VSX */ |
2963 | |
2964 | #ifdef __powerpc64__ |
2965 | case 62: /* std[u] */ |
2966 | op->ea = dsform_ea(word, regs); |
2967 | switch (word & 3) { |
2968 | case 0: /* std */ |
2969 | op->type = MKOP(STORE, 0, 8); |
2970 | break; |
2971 | case 1: /* stdu */ |
2972 | op->type = MKOP(STORE, UPDATE, 8); |
2973 | break; |
2974 | case 2: /* stq */ |
2975 | if (!(rd & 1)) |
2976 | op->type = MKOP(STORE, 0, 16); |
2977 | break; |
2978 | } |
2979 | break; |
2980 | case 1: /* Prefixed instructions */ |
2981 | if (!cpu_has_feature(CPU_FTR_ARCH_31)) |
2982 | goto unknown_opcode; |
2983 | |
2984 | prefix_r = GET_PREFIX_R(word); |
2985 | ra = GET_PREFIX_RA(suffix); |
2986 | op->update_reg = ra; |
2987 | rd = (suffix >> 21) & 0x1f; |
2988 | op->reg = rd; |
2989 | op->val = regs->gpr[rd]; |
2990 | |
2991 | suffixopcode = get_op(suffix); |
2992 | prefixtype = (word >> 24) & 0x3; |
2993 | switch (prefixtype) { |
2994 | case 0: /* Type 00 Eight-Byte Load/Store */ |
2995 | if (prefix_r && ra) |
2996 | break; |
2997 | op->ea = mlsd_8lsd_ea(word, suffix, regs); |
2998 | switch (suffixopcode) { |
2999 | case 41: /* plwa */ |
3000 | op->type = MKOP(LOAD, PREFIXED | SIGNEXT, 4); |
3001 | break; |
3002 | #ifdef CONFIG_VSX |
3003 | case 42: /* plxsd */ |
3004 | op->reg = rd + 32; |
3005 | op->type = MKOP(LOAD_VSX, PREFIXED, 8); |
3006 | op->element_size = 8; |
3007 | op->vsx_flags = VSX_CHECK_VEC; |
3008 | break; |
3009 | case 43: /* plxssp */ |
3010 | op->reg = rd + 32; |
3011 | op->type = MKOP(LOAD_VSX, PREFIXED, 4); |
3012 | op->element_size = 8; |
3013 | op->vsx_flags = VSX_FPCONV | VSX_CHECK_VEC; |
3014 | break; |
3015 | case 46: /* pstxsd */ |
3016 | op->reg = rd + 32; |
3017 | op->type = MKOP(STORE_VSX, PREFIXED, 8); |
3018 | op->element_size = 8; |
3019 | op->vsx_flags = VSX_CHECK_VEC; |
3020 | break; |
3021 | case 47: /* pstxssp */ |
3022 | op->reg = rd + 32; |
3023 | op->type = MKOP(STORE_VSX, PREFIXED, 4); |
3024 | op->element_size = 8; |
3025 | op->vsx_flags = VSX_FPCONV | VSX_CHECK_VEC; |
3026 | break; |
3027 | case 51: /* plxv1 */ |
3028 | op->reg += 32; |
3029 | fallthrough; |
3030 | case 50: /* plxv0 */ |
3031 | op->type = MKOP(LOAD_VSX, PREFIXED, 16); |
3032 | op->element_size = 16; |
3033 | op->vsx_flags = VSX_CHECK_VEC; |
3034 | break; |
3035 | case 55: /* pstxv1 */ |
3036 | op->reg = rd + 32; |
3037 | fallthrough; |
3038 | case 54: /* pstxv0 */ |
3039 | op->type = MKOP(STORE_VSX, PREFIXED, 16); |
3040 | op->element_size = 16; |
3041 | op->vsx_flags = VSX_CHECK_VEC; |
3042 | break; |
3043 | #endif /* CONFIG_VSX */ |
3044 | case 56: /* plq */ |
3045 | op->type = MKOP(LOAD, PREFIXED, 16); |
3046 | break; |
3047 | case 57: /* pld */ |
3048 | op->type = MKOP(LOAD, PREFIXED, 8); |
3049 | break; |
3050 | #ifdef CONFIG_VSX |
3051 | case 58: /* plxvp */ |
3052 | op->reg = VSX_REGISTER_XTP(rd); |
3053 | op->type = MKOP(LOAD_VSX, PREFIXED, 32); |
3054 | op->element_size = 32; |
3055 | break; |
3056 | #endif /* CONFIG_VSX */ |
3057 | case 60: /* pstq */ |
3058 | op->type = MKOP(STORE, PREFIXED, 16); |
3059 | break; |
3060 | case 61: /* pstd */ |
3061 | op->type = MKOP(STORE, PREFIXED, 8); |
3062 | break; |
3063 | #ifdef CONFIG_VSX |
3064 | case 62: /* pstxvp */ |
3065 | op->reg = VSX_REGISTER_XTP(rd); |
3066 | op->type = MKOP(STORE_VSX, PREFIXED, 32); |
3067 | op->element_size = 32; |
3068 | break; |
3069 | #endif /* CONFIG_VSX */ |
3070 | } |
3071 | break; |
3072 | case 1: /* Type 01 Eight-Byte Register-to-Register */ |
3073 | break; |
3074 | case 2: /* Type 10 Modified Load/Store */ |
3075 | if (prefix_r && ra) |
3076 | break; |
3077 | op->ea = mlsd_8lsd_ea(word, suffix, regs); |
3078 | switch (suffixopcode) { |
3079 | case 32: /* plwz */ |
3080 | op->type = MKOP(LOAD, PREFIXED, 4); |
3081 | break; |
3082 | case 34: /* plbz */ |
3083 | op->type = MKOP(LOAD, PREFIXED, 1); |
3084 | break; |
3085 | case 36: /* pstw */ |
3086 | op->type = MKOP(STORE, PREFIXED, 4); |
3087 | break; |
3088 | case 38: /* pstb */ |
3089 | op->type = MKOP(STORE, PREFIXED, 1); |
3090 | break; |
3091 | case 40: /* plhz */ |
3092 | op->type = MKOP(LOAD, PREFIXED, 2); |
3093 | break; |
3094 | case 42: /* plha */ |
3095 | op->type = MKOP(LOAD, PREFIXED | SIGNEXT, 2); |
3096 | break; |
3097 | case 44: /* psth */ |
3098 | op->type = MKOP(STORE, PREFIXED, 2); |
3099 | break; |
3100 | case 48: /* plfs */ |
3101 | op->type = MKOP(LOAD_FP, PREFIXED | FPCONV, 4); |
3102 | break; |
3103 | case 50: /* plfd */ |
3104 | op->type = MKOP(LOAD_FP, PREFIXED, 8); |
3105 | break; |
3106 | case 52: /* pstfs */ |
3107 | op->type = MKOP(STORE_FP, PREFIXED | FPCONV, 4); |
3108 | break; |
3109 | case 54: /* pstfd */ |
3110 | op->type = MKOP(STORE_FP, PREFIXED, 8); |
3111 | break; |
3112 | } |
3113 | break; |
3114 | case 3: /* Type 11 Modified Register-to-Register */ |
3115 | break; |
3116 | } |
3117 | #endif /* __powerpc64__ */ |
3118 | |
3119 | } |
3120 | |
3121 | if (OP_IS_LOAD_STORE(op->type) && (op->type & UPDATE)) { |
3122 | switch (GETTYPE(op->type)) { |
3123 | case LOAD: |
3124 | if (ra == rd) |
3125 | goto unknown_opcode; |
3126 | fallthrough; |
3127 | case STORE: |
3128 | case LOAD_FP: |
3129 | case STORE_FP: |
3130 | if (ra == 0) |
3131 | goto unknown_opcode; |
3132 | } |
3133 | } |
3134 | |
3135 | #ifdef CONFIG_VSX |
3136 | if ((GETTYPE(op->type) == LOAD_VSX || |
3137 | GETTYPE(op->type) == STORE_VSX) && |
3138 | !cpu_has_feature(CPU_FTR_VSX)) { |
3139 | return -1; |
3140 | } |
3141 | #endif /* CONFIG_VSX */ |
3142 | |
3143 | return 0; |
3144 | |
3145 | unknown_opcode: |
3146 | op->type = UNKNOWN; |
3147 | return 0; |
3148 | |
3149 | logical_done: |
3150 | if (word & 1) |
3151 | set_cr0(regs, op); |
3152 | logical_done_nocc: |
3153 | op->reg = ra; |
3154 | op->type |= SETREG; |
3155 | return 1; |
3156 | |
3157 | arith_done: |
3158 | if (word & 1) |
3159 | set_cr0(regs, op); |
3160 | compute_done: |
3161 | op->reg = rd; |
3162 | op->type |= SETREG; |
3163 | return 1; |
3164 | |
3165 | priv: |
3166 | op->type = INTERRUPT | 0x700; |
3167 | op->val = SRR1_PROGPRIV; |
3168 | return 0; |
3169 | |
3170 | trap: |
3171 | op->type = INTERRUPT | 0x700; |
3172 | op->val = SRR1_PROGTRAP; |
3173 | return 0; |
3174 | } |
3175 | EXPORT_SYMBOL_GPL(analyse_instr); |
3176 | NOKPROBE_SYMBOL(analyse_instr); |
3177 | |
3178 | /* |
3179 | * For PPC32 we always use stwu with r1 to change the stack pointer. |
3180 | * So this emulated store may corrupt the exception frame, now we |
3181 | * have to provide the exception frame trampoline, which is pushed |
3182 | * below the kprobed function stack. So we only update gpr[1] but |
3183 | * don't emulate the real store operation. We will do real store |
3184 | * operation safely in exception return code by checking this flag. |
3185 | */ |
3186 | static nokprobe_inline int handle_stack_update(unsigned long ea, struct pt_regs *regs) |
3187 | { |
3188 | /* |
3189 | * Check if we already set since that means we'll |
3190 | * lose the previous value. |
3191 | */ |
3192 | WARN_ON(test_thread_flag(TIF_EMULATE_STACK_STORE)); |
3193 | set_thread_flag(TIF_EMULATE_STACK_STORE); |
3194 | return 0; |
3195 | } |
3196 | |
3197 | static nokprobe_inline void do_signext(unsigned long *valp, int size) |
3198 | { |
3199 | switch (size) { |
3200 | case 2: |
3201 | *valp = (signed short) *valp; |
3202 | break; |
3203 | case 4: |
3204 | *valp = (signed int) *valp; |
3205 | break; |
3206 | } |
3207 | } |
3208 | |
3209 | static nokprobe_inline void do_byterev(unsigned long *valp, int size) |
3210 | { |
3211 | switch (size) { |
3212 | case 2: |
3213 | *valp = byterev_2(x: *valp); |
3214 | break; |
3215 | case 4: |
3216 | *valp = byterev_4(x: *valp); |
3217 | break; |
3218 | #ifdef __powerpc64__ |
3219 | case 8: |
3220 | *valp = byterev_8(*valp); |
3221 | break; |
3222 | #endif |
3223 | } |
3224 | } |
3225 | |
3226 | /* |
3227 | * Emulate an instruction that can be executed just by updating |
3228 | * fields in *regs. |
3229 | */ |
3230 | void emulate_update_regs(struct pt_regs *regs, struct instruction_op *op) |
3231 | { |
3232 | unsigned long next_pc; |
3233 | |
3234 | next_pc = truncate_if_32bit(msr: regs->msr, val: regs->nip + GETLENGTH(op->type)); |
3235 | switch (GETTYPE(op->type)) { |
3236 | case COMPUTE: |
3237 | if (op->type & SETREG) |
3238 | regs->gpr[op->reg] = op->val; |
3239 | if (op->type & SETCC) |
3240 | regs->ccr = op->ccval; |
3241 | if (op->type & SETXER) |
3242 | regs->xer = op->xerval; |
3243 | break; |
3244 | |
3245 | case BRANCH: |
3246 | if (op->type & SETLK) |
3247 | regs->link = next_pc; |
3248 | if (op->type & BRTAKEN) |
3249 | next_pc = op->val; |
3250 | if (op->type & DECCTR) |
3251 | --regs->ctr; |
3252 | break; |
3253 | |
3254 | case BARRIER: |
3255 | switch (op->type & BARRIER_MASK) { |
3256 | case BARRIER_SYNC: |
3257 | mb(); |
3258 | break; |
3259 | case BARRIER_ISYNC: |
3260 | isync(); |
3261 | break; |
3262 | case BARRIER_EIEIO: |
3263 | eieio(); |
3264 | break; |
3265 | #ifdef CONFIG_PPC64 |
3266 | case BARRIER_LWSYNC: |
3267 | asm volatile("lwsync" : : : "memory" ); |
3268 | break; |
3269 | case BARRIER_PTESYNC: |
3270 | asm volatile("ptesync" : : : "memory" ); |
3271 | break; |
3272 | #endif |
3273 | } |
3274 | break; |
3275 | |
3276 | case MFSPR: |
3277 | switch (op->spr) { |
3278 | case SPRN_XER: |
3279 | regs->gpr[op->reg] = regs->xer & 0xffffffffUL; |
3280 | break; |
3281 | case SPRN_LR: |
3282 | regs->gpr[op->reg] = regs->link; |
3283 | break; |
3284 | case SPRN_CTR: |
3285 | regs->gpr[op->reg] = regs->ctr; |
3286 | break; |
3287 | default: |
3288 | WARN_ON_ONCE(1); |
3289 | } |
3290 | break; |
3291 | |
3292 | case MTSPR: |
3293 | switch (op->spr) { |
3294 | case SPRN_XER: |
3295 | regs->xer = op->val & 0xffffffffUL; |
3296 | break; |
3297 | case SPRN_LR: |
3298 | regs->link = op->val; |
3299 | break; |
3300 | case SPRN_CTR: |
3301 | regs->ctr = op->val; |
3302 | break; |
3303 | default: |
3304 | WARN_ON_ONCE(1); |
3305 | } |
3306 | break; |
3307 | |
3308 | default: |
3309 | WARN_ON_ONCE(1); |
3310 | } |
3311 | regs_set_return_ip(regs, next_pc); |
3312 | } |
3313 | NOKPROBE_SYMBOL(emulate_update_regs); |
3314 | |
3315 | /* |
3316 | * Emulate a previously-analysed load or store instruction. |
3317 | * Return values are: |
3318 | * 0 = instruction emulated successfully |
3319 | * -EFAULT = address out of range or access faulted (regs->dar |
3320 | * contains the faulting address) |
3321 | * -EACCES = misaligned access, instruction requires alignment |
3322 | * -EINVAL = unknown operation in *op |
3323 | */ |
3324 | int emulate_loadstore(struct pt_regs *regs, struct instruction_op *op) |
3325 | { |
3326 | int err, size, type; |
3327 | int i, rd, nb; |
3328 | unsigned int cr; |
3329 | unsigned long val; |
3330 | unsigned long ea; |
3331 | bool cross_endian; |
3332 | |
3333 | err = 0; |
3334 | size = GETSIZE(op->type); |
3335 | type = GETTYPE(op->type); |
3336 | cross_endian = (regs->msr & MSR_LE) != (MSR_KERNEL & MSR_LE); |
3337 | ea = truncate_if_32bit(msr: regs->msr, val: op->ea); |
3338 | |
3339 | switch (type) { |
3340 | case LARX: |
3341 | if (ea & (size - 1)) |
3342 | return -EACCES; /* can't handle misaligned */ |
3343 | if (!address_ok(regs, ea, nb: size)) |
3344 | return -EFAULT; |
3345 | err = 0; |
3346 | val = 0; |
3347 | switch (size) { |
3348 | #ifdef CONFIG_PPC_HAS_LBARX_LHARX |
3349 | case 1: |
3350 | __get_user_asmx(val, ea, err, "lbarx" ); |
3351 | break; |
3352 | case 2: |
3353 | __get_user_asmx(val, ea, err, "lharx" ); |
3354 | break; |
3355 | #endif |
3356 | case 4: |
3357 | __get_user_asmx(val, ea, err, "lwarx" ); |
3358 | break; |
3359 | #ifdef __powerpc64__ |
3360 | case 8: |
3361 | __get_user_asmx(val, ea, err, "ldarx" ); |
3362 | break; |
3363 | case 16: |
3364 | err = do_lqarx(ea, ®s->gpr[op->reg]); |
3365 | break; |
3366 | #endif |
3367 | default: |
3368 | return -EINVAL; |
3369 | } |
3370 | if (err) { |
3371 | regs->dar = ea; |
3372 | break; |
3373 | } |
3374 | if (size < 16) |
3375 | regs->gpr[op->reg] = val; |
3376 | break; |
3377 | |
3378 | case STCX: |
3379 | if (ea & (size - 1)) |
3380 | return -EACCES; /* can't handle misaligned */ |
3381 | if (!address_ok(regs, ea, nb: size)) |
3382 | return -EFAULT; |
3383 | err = 0; |
3384 | switch (size) { |
3385 | #ifdef __powerpc64__ |
3386 | case 1: |
3387 | __put_user_asmx(op->val, ea, err, "stbcx." , cr); |
3388 | break; |
3389 | case 2: |
3390 | __put_user_asmx(op->val, ea, err, "sthcx." , cr); |
3391 | break; |
3392 | #endif |
3393 | case 4: |
3394 | __put_user_asmx(op->val, ea, err, "stwcx." , cr); |
3395 | break; |
3396 | #ifdef __powerpc64__ |
3397 | case 8: |
3398 | __put_user_asmx(op->val, ea, err, "stdcx." , cr); |
3399 | break; |
3400 | case 16: |
3401 | err = do_stqcx(ea, regs->gpr[op->reg], |
3402 | regs->gpr[op->reg + 1], &cr); |
3403 | break; |
3404 | #endif |
3405 | default: |
3406 | return -EINVAL; |
3407 | } |
3408 | if (!err) |
3409 | regs->ccr = (regs->ccr & 0x0fffffff) | |
3410 | (cr & 0xe0000000) | |
3411 | ((regs->xer >> 3) & 0x10000000); |
3412 | else |
3413 | regs->dar = ea; |
3414 | break; |
3415 | |
3416 | case LOAD: |
3417 | #ifdef __powerpc64__ |
3418 | if (size == 16) { |
3419 | err = emulate_lq(regs, ea, op->reg, cross_endian); |
3420 | break; |
3421 | } |
3422 | #endif |
3423 | err = read_mem(dest: ®s->gpr[op->reg], ea, nb: size, regs); |
3424 | if (!err) { |
3425 | if (op->type & SIGNEXT) |
3426 | do_signext(valp: ®s->gpr[op->reg], size); |
3427 | if ((op->type & BYTEREV) == (cross_endian ? 0 : BYTEREV)) |
3428 | do_byterev(valp: ®s->gpr[op->reg], size); |
3429 | } |
3430 | break; |
3431 | |
3432 | #ifdef CONFIG_PPC_FPU |
3433 | case LOAD_FP: |
3434 | /* |
3435 | * If the instruction is in userspace, we can emulate it even |
3436 | * if the VMX state is not live, because we have the state |
3437 | * stored in the thread_struct. If the instruction is in |
3438 | * the kernel, we must not touch the state in the thread_struct. |
3439 | */ |
3440 | if (!user_mode(regs) && !(regs->msr & MSR_FP)) |
3441 | return 0; |
3442 | err = do_fp_load(op, ea, regs, cross_endian); |
3443 | break; |
3444 | #endif |
3445 | #ifdef CONFIG_ALTIVEC |
3446 | case LOAD_VMX: |
3447 | if (!user_mode(regs) && !(regs->msr & MSR_VEC)) |
3448 | return 0; |
3449 | err = do_vec_load(op->reg, ea, size, regs, cross_endian); |
3450 | break; |
3451 | #endif |
3452 | #ifdef CONFIG_VSX |
3453 | case LOAD_VSX: { |
3454 | unsigned long msrbit = MSR_VSX; |
3455 | |
3456 | /* |
3457 | * Some VSX instructions check the MSR_VEC bit rather than MSR_VSX |
3458 | * when the target of the instruction is a vector register. |
3459 | */ |
3460 | if (op->reg >= 32 && (op->vsx_flags & VSX_CHECK_VEC)) |
3461 | msrbit = MSR_VEC; |
3462 | if (!user_mode(regs) && !(regs->msr & msrbit)) |
3463 | return 0; |
3464 | err = do_vsx_load(op, ea, regs, cross_endian); |
3465 | break; |
3466 | } |
3467 | #endif |
3468 | case LOAD_MULTI: |
3469 | if (!address_ok(regs, ea, nb: size)) |
3470 | return -EFAULT; |
3471 | rd = op->reg; |
3472 | for (i = 0; i < size; i += 4) { |
3473 | unsigned int v32 = 0; |
3474 | |
3475 | nb = size - i; |
3476 | if (nb > 4) |
3477 | nb = 4; |
3478 | err = copy_mem_in(dest: (u8 *) &v32, ea, nb, regs); |
3479 | if (err) |
3480 | break; |
3481 | if (unlikely(cross_endian)) |
3482 | v32 = byterev_4(x: v32); |
3483 | regs->gpr[rd] = v32; |
3484 | ea += 4; |
3485 | /* reg number wraps from 31 to 0 for lsw[ix] */ |
3486 | rd = (rd + 1) & 0x1f; |
3487 | } |
3488 | break; |
3489 | |
3490 | case STORE: |
3491 | #ifdef __powerpc64__ |
3492 | if (size == 16) { |
3493 | err = emulate_stq(regs, ea, op->reg, cross_endian); |
3494 | break; |
3495 | } |
3496 | #endif |
3497 | if ((op->type & UPDATE) && size == sizeof(long) && |
3498 | op->reg == 1 && op->update_reg == 1 && !user_mode(regs) && |
3499 | ea >= regs->gpr[1] - STACK_INT_FRAME_SIZE) { |
3500 | err = handle_stack_update(ea, regs); |
3501 | break; |
3502 | } |
3503 | if (unlikely(cross_endian)) |
3504 | do_byterev(valp: &op->val, size); |
3505 | err = write_mem(val: op->val, ea, nb: size, regs); |
3506 | break; |
3507 | |
3508 | #ifdef CONFIG_PPC_FPU |
3509 | case STORE_FP: |
3510 | if (!user_mode(regs) && !(regs->msr & MSR_FP)) |
3511 | return 0; |
3512 | err = do_fp_store(op, ea, regs, cross_endian); |
3513 | break; |
3514 | #endif |
3515 | #ifdef CONFIG_ALTIVEC |
3516 | case STORE_VMX: |
3517 | if (!user_mode(regs) && !(regs->msr & MSR_VEC)) |
3518 | return 0; |
3519 | err = do_vec_store(op->reg, ea, size, regs, cross_endian); |
3520 | break; |
3521 | #endif |
3522 | #ifdef CONFIG_VSX |
3523 | case STORE_VSX: { |
3524 | unsigned long msrbit = MSR_VSX; |
3525 | |
3526 | /* |
3527 | * Some VSX instructions check the MSR_VEC bit rather than MSR_VSX |
3528 | * when the target of the instruction is a vector register. |
3529 | */ |
3530 | if (op->reg >= 32 && (op->vsx_flags & VSX_CHECK_VEC)) |
3531 | msrbit = MSR_VEC; |
3532 | if (!user_mode(regs) && !(regs->msr & msrbit)) |
3533 | return 0; |
3534 | err = do_vsx_store(op, ea, regs, cross_endian); |
3535 | break; |
3536 | } |
3537 | #endif |
3538 | case STORE_MULTI: |
3539 | if (!address_ok(regs, ea, nb: size)) |
3540 | return -EFAULT; |
3541 | rd = op->reg; |
3542 | for (i = 0; i < size; i += 4) { |
3543 | unsigned int v32 = regs->gpr[rd]; |
3544 | |
3545 | nb = size - i; |
3546 | if (nb > 4) |
3547 | nb = 4; |
3548 | if (unlikely(cross_endian)) |
3549 | v32 = byterev_4(x: v32); |
3550 | err = copy_mem_out(dest: (u8 *) &v32, ea, nb, regs); |
3551 | if (err) |
3552 | break; |
3553 | ea += 4; |
3554 | /* reg number wraps from 31 to 0 for stsw[ix] */ |
3555 | rd = (rd + 1) & 0x1f; |
3556 | } |
3557 | break; |
3558 | |
3559 | default: |
3560 | return -EINVAL; |
3561 | } |
3562 | |
3563 | if (err) |
3564 | return err; |
3565 | |
3566 | if (op->type & UPDATE) |
3567 | regs->gpr[op->update_reg] = op->ea; |
3568 | |
3569 | return 0; |
3570 | } |
3571 | NOKPROBE_SYMBOL(emulate_loadstore); |
3572 | |
3573 | /* |
3574 | * Emulate instructions that cause a transfer of control, |
3575 | * loads and stores, and a few other instructions. |
3576 | * Returns 1 if the step was emulated, 0 if not, |
3577 | * or -1 if the instruction is one that should not be stepped, |
3578 | * such as an rfid, or a mtmsrd that would clear MSR_RI. |
3579 | */ |
3580 | int emulate_step(struct pt_regs *regs, ppc_inst_t instr) |
3581 | { |
3582 | struct instruction_op op; |
3583 | int r, err, type; |
3584 | unsigned long val; |
3585 | unsigned long ea; |
3586 | |
3587 | r = analyse_instr(&op, regs, instr); |
3588 | if (r < 0) |
3589 | return r; |
3590 | if (r > 0) { |
3591 | emulate_update_regs(regs, op: &op); |
3592 | return 1; |
3593 | } |
3594 | |
3595 | err = 0; |
3596 | type = GETTYPE(op.type); |
3597 | |
3598 | if (OP_IS_LOAD_STORE(type)) { |
3599 | err = emulate_loadstore(regs, op: &op); |
3600 | if (err) |
3601 | return 0; |
3602 | goto instr_done; |
3603 | } |
3604 | |
3605 | switch (type) { |
3606 | case CACHEOP: |
3607 | ea = truncate_if_32bit(msr: regs->msr, val: op.ea); |
3608 | if (!address_ok(regs, ea, nb: 8)) |
3609 | return 0; |
3610 | switch (op.type & CACHEOP_MASK) { |
3611 | case DCBST: |
3612 | __cacheop_user_asmx(ea, err, "dcbst" ); |
3613 | break; |
3614 | case DCBF: |
3615 | __cacheop_user_asmx(ea, err, "dcbf" ); |
3616 | break; |
3617 | case DCBTST: |
3618 | if (op.reg == 0) |
3619 | prefetchw(x: (void *) ea); |
3620 | break; |
3621 | case DCBT: |
3622 | if (op.reg == 0) |
3623 | prefetch((void *) ea); |
3624 | break; |
3625 | case ICBI: |
3626 | __cacheop_user_asmx(ea, err, "icbi" ); |
3627 | break; |
3628 | case DCBZ: |
3629 | err = emulate_dcbz(ea, regs); |
3630 | break; |
3631 | } |
3632 | if (err) { |
3633 | regs->dar = ea; |
3634 | return 0; |
3635 | } |
3636 | goto instr_done; |
3637 | |
3638 | case MFMSR: |
3639 | regs->gpr[op.reg] = regs->msr & MSR_MASK; |
3640 | goto instr_done; |
3641 | |
3642 | case MTMSR: |
3643 | val = regs->gpr[op.reg]; |
3644 | if ((val & MSR_RI) == 0) |
3645 | /* can't step mtmsr[d] that would clear MSR_RI */ |
3646 | return -1; |
3647 | /* here op.val is the mask of bits to change */ |
3648 | regs_set_return_msr(regs, (regs->msr & ~op.val) | (val & op.val)); |
3649 | goto instr_done; |
3650 | |
3651 | case SYSCALL: /* sc */ |
3652 | /* |
3653 | * Per ISA v3.1, section 7.5.15 'Trace Interrupt', we can't |
3654 | * single step a system call instruction: |
3655 | * |
3656 | * Successful completion for an instruction means that the |
3657 | * instruction caused no other interrupt. Thus a Trace |
3658 | * interrupt never occurs for a System Call or System Call |
3659 | * Vectored instruction, or for a Trap instruction that |
3660 | * traps. |
3661 | */ |
3662 | return -1; |
3663 | case SYSCALL_VECTORED_0: /* scv 0 */ |
3664 | return -1; |
3665 | case RFI: |
3666 | return -1; |
3667 | } |
3668 | return 0; |
3669 | |
3670 | instr_done: |
3671 | regs_set_return_ip(regs, |
3672 | truncate_if_32bit(msr: regs->msr, val: regs->nip + GETLENGTH(op.type))); |
3673 | return 1; |
3674 | } |
3675 | NOKPROBE_SYMBOL(emulate_step); |
3676 | |