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10#include <linux/moduleloader.h>
11#include <asm/cacheflush.h>
12#include <asm/asm-compat.h>
13#include <linux/netdevice.h>
14#include <linux/filter.h>
15#include <linux/if_vlan.h>
16#include <asm/kprobes.h>
17#include <linux/bpf.h>
18
19#include "bpf_jit.h"
20
21
22
23
24
25
26
27
28
29
30
31
32#define BPF_PPC_STACK_SAVE (15 * 4 + 4)
33
34#define BPF_PPC_STACKFRAME(ctx) (STACK_FRAME_MIN_SIZE + BPF_PPC_STACK_SAVE + (ctx)->stack_size)
35
36
37#define TMP_REG (MAX_BPF_JIT_REG + 0)
38
39
40const int b2p[MAX_BPF_JIT_REG + 1] = {
41
42 [BPF_REG_0] = 12,
43
44 [BPF_REG_1] = 4,
45 [BPF_REG_2] = 6,
46 [BPF_REG_3] = 8,
47 [BPF_REG_4] = 10,
48 [BPF_REG_5] = 22,
49
50 [BPF_REG_6] = 24,
51 [BPF_REG_7] = 26,
52 [BPF_REG_8] = 28,
53 [BPF_REG_9] = 30,
54
55 [BPF_REG_FP] = 18,
56
57 [BPF_REG_AX] = 20,
58 [TMP_REG] = 31,
59};
60
61static int bpf_to_ppc(struct codegen_context *ctx, int reg)
62{
63 return ctx->b2p[reg];
64}
65
66
67#define BPF_PPC_NVR_MIN 17
68#define BPF_PPC_TC 16
69
70static int bpf_jit_stack_offsetof(struct codegen_context *ctx, int reg)
71{
72 if ((reg >= BPF_PPC_NVR_MIN && reg < 32) || reg == BPF_PPC_TC)
73 return BPF_PPC_STACKFRAME(ctx) - 4 * (32 - reg);
74
75 WARN(true, "BPF JIT is asking about unknown registers, will crash the stack");
76
77 return BPF_PPC_STACKFRAME(ctx) - 4;
78}
79
80void bpf_jit_realloc_regs(struct codegen_context *ctx)
81{
82 if (ctx->seen & SEEN_FUNC)
83 return;
84
85 while (ctx->seen & SEEN_NVREG_MASK &&
86 (ctx->seen & SEEN_VREG_MASK) != SEEN_VREG_MASK) {
87 int old = 32 - fls(ctx->seen & (SEEN_NVREG_MASK & 0xaaaaaaab));
88 int new = 32 - fls(~ctx->seen & (SEEN_VREG_MASK & 0xaaaaaaaa));
89 int i;
90
91 for (i = BPF_REG_0; i <= TMP_REG; i++) {
92 if (ctx->b2p[i] != old)
93 continue;
94 ctx->b2p[i] = new;
95 bpf_set_seen_register(ctx, new);
96 bpf_clear_seen_register(ctx, old);
97 if (i != TMP_REG) {
98 bpf_set_seen_register(ctx, new - 1);
99 bpf_clear_seen_register(ctx, old - 1);
100 }
101 break;
102 }
103 }
104}
105
106void bpf_jit_build_prologue(u32 *image, struct codegen_context *ctx)
107{
108 int i;
109
110
111 EMIT(PPC_RAW_MR(bpf_to_ppc(ctx, BPF_REG_1), _R3));
112 EMIT(PPC_RAW_LI(bpf_to_ppc(ctx, BPF_REG_1) - 1, 0));
113 EMIT(PPC_RAW_STWU(_R1, _R1, -BPF_PPC_STACKFRAME(ctx)));
114
115
116
117
118
119
120 if (ctx->seen & SEEN_TAILCALL)
121 EMIT(PPC_RAW_STW(bpf_to_ppc(ctx, BPF_REG_1) - 1, _R1,
122 bpf_jit_stack_offsetof(ctx, BPF_PPC_TC)));
123 else
124 EMIT(PPC_RAW_NOP());
125
126#define BPF_TAILCALL_PROLOGUE_SIZE 16
127
128
129
130
131
132 if (ctx->seen & SEEN_FUNC)
133 EMIT(PPC_RAW_MFLR(_R0));
134
135
136
137
138 for (i = BPF_PPC_NVR_MIN; i <= 31; i++)
139 if (bpf_is_seen_register(ctx, i))
140 EMIT(PPC_RAW_STW(i, _R1, bpf_jit_stack_offsetof(ctx, i)));
141
142
143 if (bpf_is_seen_register(ctx, bpf_to_ppc(ctx, BPF_REG_5))) {
144 EMIT(PPC_RAW_LWZ(bpf_to_ppc(ctx, BPF_REG_5) - 1, _R1, BPF_PPC_STACKFRAME(ctx)) + 8);
145 EMIT(PPC_RAW_LWZ(bpf_to_ppc(ctx, BPF_REG_5), _R1, BPF_PPC_STACKFRAME(ctx)) + 12);
146 }
147
148
149 if (bpf_is_seen_register(ctx, bpf_to_ppc(ctx, BPF_REG_FP))) {
150 EMIT(PPC_RAW_LI(bpf_to_ppc(ctx, BPF_REG_FP) - 1, 0));
151 EMIT(PPC_RAW_ADDI(bpf_to_ppc(ctx, BPF_REG_FP), _R1,
152 STACK_FRAME_MIN_SIZE + ctx->stack_size));
153 }
154
155 if (ctx->seen & SEEN_FUNC)
156 EMIT(PPC_RAW_STW(_R0, _R1, BPF_PPC_STACKFRAME(ctx) + PPC_LR_STKOFF));
157}
158
159static void bpf_jit_emit_common_epilogue(u32 *image, struct codegen_context *ctx)
160{
161 int i;
162
163
164 for (i = BPF_PPC_NVR_MIN; i <= 31; i++)
165 if (bpf_is_seen_register(ctx, i))
166 EMIT(PPC_RAW_LWZ(i, _R1, bpf_jit_stack_offsetof(ctx, i)));
167}
168
169void bpf_jit_build_epilogue(u32 *image, struct codegen_context *ctx)
170{
171 EMIT(PPC_RAW_MR(_R3, bpf_to_ppc(ctx, BPF_REG_0)));
172
173 bpf_jit_emit_common_epilogue(image, ctx);
174
175
176
177 if (ctx->seen & SEEN_FUNC)
178 EMIT(PPC_RAW_LWZ(_R0, _R1, BPF_PPC_STACKFRAME(ctx) + PPC_LR_STKOFF));
179
180 EMIT(PPC_RAW_ADDI(_R1, _R1, BPF_PPC_STACKFRAME(ctx)));
181
182 if (ctx->seen & SEEN_FUNC)
183 EMIT(PPC_RAW_MTLR(_R0));
184
185 EMIT(PPC_RAW_BLR());
186}
187
188void bpf_jit_emit_func_call_rel(u32 *image, struct codegen_context *ctx, u64 func)
189{
190 s32 rel = (s32)func - (s32)(image + ctx->idx);
191
192 if (image && rel < 0x2000000 && rel >= -0x2000000) {
193 PPC_BL_ABS(func);
194 } else {
195
196 EMIT(PPC_RAW_LIS(_R0, IMM_H(func)));
197 EMIT(PPC_RAW_ORI(_R0, _R0, IMM_L(func)));
198 EMIT(PPC_RAW_MTCTR(_R0));
199 EMIT(PPC_RAW_BCTRL());
200 }
201}
202
203static int bpf_jit_emit_tail_call(u32 *image, struct codegen_context *ctx, u32 out)
204{
205
206
207
208
209
210
211 int b2p_bpf_array = bpf_to_ppc(ctx, BPF_REG_2);
212 int b2p_index = bpf_to_ppc(ctx, BPF_REG_3);
213
214
215
216
217
218 EMIT(PPC_RAW_LWZ(_R0, b2p_bpf_array, offsetof(struct bpf_array, map.max_entries)));
219 EMIT(PPC_RAW_CMPLW(b2p_index, _R0));
220 EMIT(PPC_RAW_LWZ(_R0, _R1, bpf_jit_stack_offsetof(ctx, BPF_PPC_TC)));
221 PPC_BCC(COND_GE, out);
222
223
224
225
226
227 EMIT(PPC_RAW_CMPLWI(_R0, MAX_TAIL_CALL_CNT));
228
229 EMIT(PPC_RAW_ADDIC(_R0, _R0, 1));
230 PPC_BCC(COND_GT, out);
231
232
233 EMIT(PPC_RAW_RLWINM(_R3, b2p_index, 2, 0, 29));
234 EMIT(PPC_RAW_ADD(_R3, _R3, b2p_bpf_array));
235 EMIT(PPC_RAW_LWZ(_R3, _R3, offsetof(struct bpf_array, ptrs)));
236 EMIT(PPC_RAW_STW(_R0, _R1, bpf_jit_stack_offsetof(ctx, BPF_PPC_TC)));
237
238
239
240
241
242 EMIT(PPC_RAW_CMPLWI(_R3, 0));
243 PPC_BCC(COND_EQ, out);
244
245
246 EMIT(PPC_RAW_LWZ(_R3, _R3, offsetof(struct bpf_prog, bpf_func)));
247
248 if (ctx->seen & SEEN_FUNC)
249 EMIT(PPC_RAW_LWZ(_R0, _R1, BPF_PPC_STACKFRAME(ctx) + PPC_LR_STKOFF));
250
251 EMIT(PPC_RAW_ADDIC(_R3, _R3, BPF_TAILCALL_PROLOGUE_SIZE));
252
253 if (ctx->seen & SEEN_FUNC)
254 EMIT(PPC_RAW_MTLR(_R0));
255
256 EMIT(PPC_RAW_MTCTR(_R3));
257
258 EMIT(PPC_RAW_MR(_R3, bpf_to_ppc(ctx, BPF_REG_1)));
259
260
261 bpf_jit_emit_common_epilogue(image, ctx);
262
263 EMIT(PPC_RAW_BCTR());
264
265
266 return 0;
267}
268
269
270int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, struct codegen_context *ctx,
271 u32 *addrs, bool extra_pass)
272{
273 const struct bpf_insn *insn = fp->insnsi;
274 int flen = fp->len;
275 int i, ret;
276
277
278 u32 exit_addr = addrs[flen];
279
280 for (i = 0; i < flen; i++) {
281 u32 code = insn[i].code;
282 u32 dst_reg = bpf_to_ppc(ctx, insn[i].dst_reg);
283 u32 dst_reg_h = dst_reg - 1;
284 u32 src_reg = bpf_to_ppc(ctx, insn[i].src_reg);
285 u32 src_reg_h = src_reg - 1;
286 u32 tmp_reg = bpf_to_ppc(ctx, TMP_REG);
287 s16 off = insn[i].off;
288 s32 imm = insn[i].imm;
289 bool func_addr_fixed;
290 u64 func_addr;
291 u32 true_cond;
292
293
294
295
296
297 addrs[i] = ctx->idx * 4;
298
299
300
301
302
303
304
305
306
307
308
309
310 if (dst_reg >= 3 && dst_reg < 32) {
311 bpf_set_seen_register(ctx, dst_reg);
312 bpf_set_seen_register(ctx, dst_reg_h);
313 }
314
315 if (src_reg >= 3 && src_reg < 32) {
316 bpf_set_seen_register(ctx, src_reg);
317 bpf_set_seen_register(ctx, src_reg_h);
318 }
319
320 switch (code) {
321
322
323
324 case BPF_ALU | BPF_ADD | BPF_X:
325 EMIT(PPC_RAW_ADD(dst_reg, dst_reg, src_reg));
326 break;
327 case BPF_ALU64 | BPF_ADD | BPF_X:
328 EMIT(PPC_RAW_ADDC(dst_reg, dst_reg, src_reg));
329 EMIT(PPC_RAW_ADDE(dst_reg_h, dst_reg_h, src_reg_h));
330 break;
331 case BPF_ALU | BPF_SUB | BPF_X:
332 EMIT(PPC_RAW_SUB(dst_reg, dst_reg, src_reg));
333 break;
334 case BPF_ALU64 | BPF_SUB | BPF_X:
335 EMIT(PPC_RAW_SUBFC(dst_reg, src_reg, dst_reg));
336 EMIT(PPC_RAW_SUBFE(dst_reg_h, src_reg_h, dst_reg_h));
337 break;
338 case BPF_ALU | BPF_SUB | BPF_K:
339 imm = -imm;
340 fallthrough;
341 case BPF_ALU | BPF_ADD | BPF_K:
342 if (IMM_HA(imm) & 0xffff)
343 EMIT(PPC_RAW_ADDIS(dst_reg, dst_reg, IMM_HA(imm)));
344 if (IMM_L(imm))
345 EMIT(PPC_RAW_ADDI(dst_reg, dst_reg, IMM_L(imm)));
346 break;
347 case BPF_ALU64 | BPF_SUB | BPF_K:
348 imm = -imm;
349 fallthrough;
350 case BPF_ALU64 | BPF_ADD | BPF_K:
351 if (!imm)
352 break;
353
354 if (imm >= -32768 && imm < 32768) {
355 EMIT(PPC_RAW_ADDIC(dst_reg, dst_reg, imm));
356 } else {
357 PPC_LI32(_R0, imm);
358 EMIT(PPC_RAW_ADDC(dst_reg, dst_reg, _R0));
359 }
360 if (imm >= 0 || (BPF_OP(code) == BPF_SUB && imm == 0x80000000))
361 EMIT(PPC_RAW_ADDZE(dst_reg_h, dst_reg_h));
362 else
363 EMIT(PPC_RAW_ADDME(dst_reg_h, dst_reg_h));
364 break;
365 case BPF_ALU64 | BPF_MUL | BPF_X:
366 bpf_set_seen_register(ctx, tmp_reg);
367 EMIT(PPC_RAW_MULW(_R0, dst_reg, src_reg_h));
368 EMIT(PPC_RAW_MULW(dst_reg_h, dst_reg_h, src_reg));
369 EMIT(PPC_RAW_MULHWU(tmp_reg, dst_reg, src_reg));
370 EMIT(PPC_RAW_MULW(dst_reg, dst_reg, src_reg));
371 EMIT(PPC_RAW_ADD(dst_reg_h, dst_reg_h, _R0));
372 EMIT(PPC_RAW_ADD(dst_reg_h, dst_reg_h, tmp_reg));
373 break;
374 case BPF_ALU | BPF_MUL | BPF_X:
375 EMIT(PPC_RAW_MULW(dst_reg, dst_reg, src_reg));
376 break;
377 case BPF_ALU | BPF_MUL | BPF_K:
378 if (imm >= -32768 && imm < 32768) {
379 EMIT(PPC_RAW_MULI(dst_reg, dst_reg, imm));
380 } else {
381 PPC_LI32(_R0, imm);
382 EMIT(PPC_RAW_MULW(dst_reg, dst_reg, _R0));
383 }
384 break;
385 case BPF_ALU64 | BPF_MUL | BPF_K:
386 if (!imm) {
387 PPC_LI32(dst_reg, 0);
388 PPC_LI32(dst_reg_h, 0);
389 break;
390 }
391 if (imm == 1)
392 break;
393 if (imm == -1) {
394 EMIT(PPC_RAW_SUBFIC(dst_reg, dst_reg, 0));
395 EMIT(PPC_RAW_SUBFZE(dst_reg_h, dst_reg_h));
396 break;
397 }
398 bpf_set_seen_register(ctx, tmp_reg);
399 PPC_LI32(tmp_reg, imm);
400 EMIT(PPC_RAW_MULW(dst_reg_h, dst_reg_h, tmp_reg));
401 if (imm < 0)
402 EMIT(PPC_RAW_SUB(dst_reg_h, dst_reg_h, dst_reg));
403 EMIT(PPC_RAW_MULHWU(_R0, dst_reg, tmp_reg));
404 EMIT(PPC_RAW_MULW(dst_reg, dst_reg, tmp_reg));
405 EMIT(PPC_RAW_ADD(dst_reg_h, dst_reg_h, _R0));
406 break;
407 case BPF_ALU | BPF_DIV | BPF_X:
408 EMIT(PPC_RAW_DIVWU(dst_reg, dst_reg, src_reg));
409 break;
410 case BPF_ALU | BPF_MOD | BPF_X:
411 EMIT(PPC_RAW_DIVWU(_R0, dst_reg, src_reg));
412 EMIT(PPC_RAW_MULW(_R0, src_reg, _R0));
413 EMIT(PPC_RAW_SUB(dst_reg, dst_reg, _R0));
414 break;
415 case BPF_ALU64 | BPF_DIV | BPF_X:
416 return -EOPNOTSUPP;
417 case BPF_ALU64 | BPF_MOD | BPF_X:
418 return -EOPNOTSUPP;
419 case BPF_ALU | BPF_DIV | BPF_K:
420 if (!imm)
421 return -EINVAL;
422 if (imm == 1)
423 break;
424
425 PPC_LI32(_R0, imm);
426 EMIT(PPC_RAW_DIVWU(dst_reg, dst_reg, _R0));
427 break;
428 case BPF_ALU | BPF_MOD | BPF_K:
429 if (!imm)
430 return -EINVAL;
431
432 if (!is_power_of_2((u32)imm)) {
433 bpf_set_seen_register(ctx, tmp_reg);
434 PPC_LI32(tmp_reg, imm);
435 EMIT(PPC_RAW_DIVWU(_R0, dst_reg, tmp_reg));
436 EMIT(PPC_RAW_MULW(_R0, tmp_reg, _R0));
437 EMIT(PPC_RAW_SUB(dst_reg, dst_reg, _R0));
438 break;
439 }
440 if (imm == 1)
441 EMIT(PPC_RAW_LI(dst_reg, 0));
442 else
443 EMIT(PPC_RAW_RLWINM(dst_reg, dst_reg, 0, 32 - ilog2((u32)imm), 31));
444
445 break;
446 case BPF_ALU64 | BPF_MOD | BPF_K:
447 if (!imm)
448 return -EINVAL;
449 if (imm < 0)
450 imm = -imm;
451 if (!is_power_of_2(imm))
452 return -EOPNOTSUPP;
453 if (imm == 1)
454 EMIT(PPC_RAW_LI(dst_reg, 0));
455 else
456 EMIT(PPC_RAW_RLWINM(dst_reg, dst_reg, 0, 32 - ilog2(imm), 31));
457 EMIT(PPC_RAW_LI(dst_reg_h, 0));
458 break;
459 case BPF_ALU64 | BPF_DIV | BPF_K:
460 if (!imm)
461 return -EINVAL;
462 if (!is_power_of_2(abs(imm)))
463 return -EOPNOTSUPP;
464
465 if (imm < 0) {
466 EMIT(PPC_RAW_SUBFIC(dst_reg, dst_reg, 0));
467 EMIT(PPC_RAW_SUBFZE(dst_reg_h, dst_reg_h));
468 imm = -imm;
469 }
470 if (imm == 1)
471 break;
472 imm = ilog2(imm);
473 EMIT(PPC_RAW_RLWINM(dst_reg, dst_reg, 32 - imm, imm, 31));
474 EMIT(PPC_RAW_RLWIMI(dst_reg, dst_reg_h, 32 - imm, 0, imm - 1));
475 EMIT(PPC_RAW_SRAWI(dst_reg_h, dst_reg_h, imm));
476 break;
477 case BPF_ALU | BPF_NEG:
478 EMIT(PPC_RAW_NEG(dst_reg, dst_reg));
479 break;
480 case BPF_ALU64 | BPF_NEG:
481 EMIT(PPC_RAW_SUBFIC(dst_reg, dst_reg, 0));
482 EMIT(PPC_RAW_SUBFZE(dst_reg_h, dst_reg_h));
483 break;
484
485
486
487
488 case BPF_ALU64 | BPF_AND | BPF_X:
489 EMIT(PPC_RAW_AND(dst_reg, dst_reg, src_reg));
490 EMIT(PPC_RAW_AND(dst_reg_h, dst_reg_h, src_reg_h));
491 break;
492 case BPF_ALU | BPF_AND | BPF_X:
493 EMIT(PPC_RAW_AND(dst_reg, dst_reg, src_reg));
494 break;
495 case BPF_ALU64 | BPF_AND | BPF_K:
496 if (imm >= 0)
497 EMIT(PPC_RAW_LI(dst_reg_h, 0));
498 fallthrough;
499 case BPF_ALU | BPF_AND | BPF_K:
500 if (!IMM_H(imm)) {
501 EMIT(PPC_RAW_ANDI(dst_reg, dst_reg, IMM_L(imm)));
502 } else if (!IMM_L(imm)) {
503 EMIT(PPC_RAW_ANDIS(dst_reg, dst_reg, IMM_H(imm)));
504 } else if (imm == (((1 << fls(imm)) - 1) ^ ((1 << (ffs(i) - 1)) - 1))) {
505 EMIT(PPC_RAW_RLWINM(dst_reg, dst_reg, 0,
506 32 - fls(imm), 32 - ffs(imm)));
507 } else {
508 PPC_LI32(_R0, imm);
509 EMIT(PPC_RAW_AND(dst_reg, dst_reg, _R0));
510 }
511 break;
512 case BPF_ALU64 | BPF_OR | BPF_X:
513 EMIT(PPC_RAW_OR(dst_reg, dst_reg, src_reg));
514 EMIT(PPC_RAW_OR(dst_reg_h, dst_reg_h, src_reg_h));
515 break;
516 case BPF_ALU | BPF_OR | BPF_X:
517 EMIT(PPC_RAW_OR(dst_reg, dst_reg, src_reg));
518 break;
519 case BPF_ALU64 | BPF_OR | BPF_K:
520
521 if (imm < 0)
522 EMIT(PPC_RAW_LI(dst_reg_h, -1));
523 fallthrough;
524 case BPF_ALU | BPF_OR | BPF_K:
525 if (IMM_L(imm))
526 EMIT(PPC_RAW_ORI(dst_reg, dst_reg, IMM_L(imm)));
527 if (IMM_H(imm))
528 EMIT(PPC_RAW_ORIS(dst_reg, dst_reg, IMM_H(imm)));
529 break;
530 case BPF_ALU64 | BPF_XOR | BPF_X:
531 if (dst_reg == src_reg) {
532 EMIT(PPC_RAW_LI(dst_reg, 0));
533 EMIT(PPC_RAW_LI(dst_reg_h, 0));
534 } else {
535 EMIT(PPC_RAW_XOR(dst_reg, dst_reg, src_reg));
536 EMIT(PPC_RAW_XOR(dst_reg_h, dst_reg_h, src_reg_h));
537 }
538 break;
539 case BPF_ALU | BPF_XOR | BPF_X:
540 if (dst_reg == src_reg)
541 EMIT(PPC_RAW_LI(dst_reg, 0));
542 else
543 EMIT(PPC_RAW_XOR(dst_reg, dst_reg, src_reg));
544 break;
545 case BPF_ALU64 | BPF_XOR | BPF_K:
546 if (imm < 0)
547 EMIT(PPC_RAW_NOR(dst_reg_h, dst_reg_h, dst_reg_h));
548 fallthrough;
549 case BPF_ALU | BPF_XOR | BPF_K:
550 if (IMM_L(imm))
551 EMIT(PPC_RAW_XORI(dst_reg, dst_reg, IMM_L(imm)));
552 if (IMM_H(imm))
553 EMIT(PPC_RAW_XORIS(dst_reg, dst_reg, IMM_H(imm)));
554 break;
555 case BPF_ALU | BPF_LSH | BPF_X:
556 EMIT(PPC_RAW_SLW(dst_reg, dst_reg, src_reg));
557 break;
558 case BPF_ALU64 | BPF_LSH | BPF_X:
559 bpf_set_seen_register(ctx, tmp_reg);
560 EMIT(PPC_RAW_SUBFIC(_R0, src_reg, 32));
561 EMIT(PPC_RAW_SLW(dst_reg_h, dst_reg_h, src_reg));
562 EMIT(PPC_RAW_ADDI(tmp_reg, src_reg, 32));
563 EMIT(PPC_RAW_SRW(_R0, dst_reg, _R0));
564 EMIT(PPC_RAW_SLW(tmp_reg, dst_reg, tmp_reg));
565 EMIT(PPC_RAW_OR(dst_reg_h, dst_reg_h, _R0));
566 EMIT(PPC_RAW_SLW(dst_reg, dst_reg, src_reg));
567 EMIT(PPC_RAW_OR(dst_reg_h, dst_reg_h, tmp_reg));
568 break;
569 case BPF_ALU | BPF_LSH | BPF_K:
570 if (!imm)
571 break;
572 EMIT(PPC_RAW_SLWI(dst_reg, dst_reg, imm));
573 break;
574 case BPF_ALU64 | BPF_LSH | BPF_K:
575 if (imm < 0)
576 return -EINVAL;
577 if (!imm)
578 break;
579 if (imm < 32) {
580 EMIT(PPC_RAW_RLWINM(dst_reg_h, dst_reg_h, imm, 0, 31 - imm));
581 EMIT(PPC_RAW_RLWIMI(dst_reg_h, dst_reg, imm, 32 - imm, 31));
582 EMIT(PPC_RAW_RLWINM(dst_reg, dst_reg, imm, 0, 31 - imm));
583 break;
584 }
585 if (imm < 64)
586 EMIT(PPC_RAW_RLWINM(dst_reg_h, dst_reg, imm, 0, 31 - imm));
587 else
588 EMIT(PPC_RAW_LI(dst_reg_h, 0));
589 EMIT(PPC_RAW_LI(dst_reg, 0));
590 break;
591 case BPF_ALU | BPF_RSH | BPF_X:
592 EMIT(PPC_RAW_SRW(dst_reg, dst_reg, src_reg));
593 break;
594 case BPF_ALU64 | BPF_RSH | BPF_X:
595 bpf_set_seen_register(ctx, tmp_reg);
596 EMIT(PPC_RAW_SUBFIC(_R0, src_reg, 32));
597 EMIT(PPC_RAW_SRW(dst_reg, dst_reg, src_reg));
598 EMIT(PPC_RAW_ADDI(tmp_reg, src_reg, 32));
599 EMIT(PPC_RAW_SLW(_R0, dst_reg_h, _R0));
600 EMIT(PPC_RAW_SRW(tmp_reg, dst_reg_h, tmp_reg));
601 EMIT(PPC_RAW_OR(dst_reg, dst_reg, _R0));
602 EMIT(PPC_RAW_SRW(dst_reg_h, dst_reg_h, src_reg));
603 EMIT(PPC_RAW_OR(dst_reg, dst_reg, tmp_reg));
604 break;
605 case BPF_ALU | BPF_RSH | BPF_K:
606 if (!imm)
607 break;
608 EMIT(PPC_RAW_SRWI(dst_reg, dst_reg, imm));
609 break;
610 case BPF_ALU64 | BPF_RSH | BPF_K:
611 if (imm < 0)
612 return -EINVAL;
613 if (!imm)
614 break;
615 if (imm < 32) {
616 EMIT(PPC_RAW_RLWINM(dst_reg, dst_reg, 32 - imm, imm, 31));
617 EMIT(PPC_RAW_RLWIMI(dst_reg, dst_reg_h, 32 - imm, 0, imm - 1));
618 EMIT(PPC_RAW_RLWINM(dst_reg_h, dst_reg_h, 32 - imm, imm, 31));
619 break;
620 }
621 if (imm < 64)
622 EMIT(PPC_RAW_RLWINM(dst_reg, dst_reg_h, 64 - imm, imm - 32, 31));
623 else
624 EMIT(PPC_RAW_LI(dst_reg, 0));
625 EMIT(PPC_RAW_LI(dst_reg_h, 0));
626 break;
627 case BPF_ALU | BPF_ARSH | BPF_X:
628 EMIT(PPC_RAW_SRAW(dst_reg, dst_reg, src_reg));
629 break;
630 case BPF_ALU64 | BPF_ARSH | BPF_X:
631 bpf_set_seen_register(ctx, tmp_reg);
632 EMIT(PPC_RAW_SUBFIC(_R0, src_reg, 32));
633 EMIT(PPC_RAW_SRW(dst_reg, dst_reg, src_reg));
634 EMIT(PPC_RAW_SLW(_R0, dst_reg_h, _R0));
635 EMIT(PPC_RAW_ADDI(tmp_reg, src_reg, 32));
636 EMIT(PPC_RAW_OR(dst_reg, dst_reg, _R0));
637 EMIT(PPC_RAW_RLWINM(_R0, tmp_reg, 0, 26, 26));
638 EMIT(PPC_RAW_SRAW(tmp_reg, dst_reg_h, tmp_reg));
639 EMIT(PPC_RAW_SRAW(dst_reg_h, dst_reg_h, src_reg));
640 EMIT(PPC_RAW_SLW(tmp_reg, tmp_reg, _R0));
641 EMIT(PPC_RAW_OR(dst_reg, dst_reg, tmp_reg));
642 break;
643 case BPF_ALU | BPF_ARSH | BPF_K:
644 if (!imm)
645 break;
646 EMIT(PPC_RAW_SRAWI(dst_reg, dst_reg, imm));
647 break;
648 case BPF_ALU64 | BPF_ARSH | BPF_K:
649 if (imm < 0)
650 return -EINVAL;
651 if (!imm)
652 break;
653 if (imm < 32) {
654 EMIT(PPC_RAW_RLWINM(dst_reg, dst_reg, 32 - imm, imm, 31));
655 EMIT(PPC_RAW_RLWIMI(dst_reg, dst_reg_h, 32 - imm, 0, imm - 1));
656 EMIT(PPC_RAW_SRAWI(dst_reg_h, dst_reg_h, imm));
657 break;
658 }
659 if (imm < 64)
660 EMIT(PPC_RAW_SRAWI(dst_reg, dst_reg_h, imm - 32));
661 else
662 EMIT(PPC_RAW_SRAWI(dst_reg, dst_reg_h, 31));
663 EMIT(PPC_RAW_SRAWI(dst_reg_h, dst_reg_h, 31));
664 break;
665
666
667
668
669 case BPF_ALU64 | BPF_MOV | BPF_X:
670 if (dst_reg == src_reg)
671 break;
672 EMIT(PPC_RAW_MR(dst_reg, src_reg));
673 EMIT(PPC_RAW_MR(dst_reg_h, src_reg_h));
674 break;
675 case BPF_ALU | BPF_MOV | BPF_X:
676
677 if (imm == 1)
678 EMIT(PPC_RAW_LI(dst_reg_h, 0));
679 else if (dst_reg != src_reg)
680 EMIT(PPC_RAW_MR(dst_reg, src_reg));
681 break;
682 case BPF_ALU64 | BPF_MOV | BPF_K:
683 PPC_LI32(dst_reg, imm);
684 PPC_EX32(dst_reg_h, imm);
685 break;
686 case BPF_ALU | BPF_MOV | BPF_K:
687 PPC_LI32(dst_reg, imm);
688 break;
689
690
691
692
693 case BPF_ALU | BPF_END | BPF_FROM_LE:
694 switch (imm) {
695 case 16:
696
697 EMIT(PPC_RAW_RLWIMI(dst_reg, dst_reg, 16, 0, 15));
698
699 EMIT(PPC_RAW_RLWINM(dst_reg, dst_reg, 24, 16, 31));
700 break;
701 case 32:
702
703
704
705
706
707 EMIT(PPC_RAW_RLWINM(_R0, dst_reg, 8, 0, 31));
708
709 EMIT(PPC_RAW_RLWIMI(_R0, dst_reg, 24, 0, 7));
710
711 EMIT(PPC_RAW_RLWIMI(_R0, dst_reg, 24, 16, 23));
712 EMIT(PPC_RAW_MR(dst_reg, _R0));
713 break;
714 case 64:
715 bpf_set_seen_register(ctx, tmp_reg);
716 EMIT(PPC_RAW_RLWINM(tmp_reg, dst_reg, 8, 0, 31));
717 EMIT(PPC_RAW_RLWINM(_R0, dst_reg_h, 8, 0, 31));
718
719 EMIT(PPC_RAW_RLWIMI(tmp_reg, dst_reg, 24, 0, 7));
720 EMIT(PPC_RAW_RLWIMI(_R0, dst_reg_h, 24, 0, 7));
721
722 EMIT(PPC_RAW_RLWIMI(tmp_reg, dst_reg, 24, 16, 23));
723 EMIT(PPC_RAW_RLWIMI(_R0, dst_reg_h, 24, 16, 23));
724 EMIT(PPC_RAW_MR(dst_reg, _R0));
725 EMIT(PPC_RAW_MR(dst_reg_h, tmp_reg));
726 break;
727 }
728 break;
729 case BPF_ALU | BPF_END | BPF_FROM_BE:
730 switch (imm) {
731 case 16:
732
733 EMIT(PPC_RAW_RLWINM(dst_reg, dst_reg, 0, 16, 31));
734 break;
735 case 32:
736 case 64:
737
738 break;
739 }
740 break;
741
742
743
744
745 case BPF_ST | BPF_NOSPEC:
746 break;
747
748
749
750
751 case BPF_STX | BPF_MEM | BPF_B:
752 EMIT(PPC_RAW_STB(src_reg, dst_reg, off));
753 break;
754 case BPF_ST | BPF_MEM | BPF_B:
755 PPC_LI32(_R0, imm);
756 EMIT(PPC_RAW_STB(_R0, dst_reg, off));
757 break;
758 case BPF_STX | BPF_MEM | BPF_H:
759 EMIT(PPC_RAW_STH(src_reg, dst_reg, off));
760 break;
761 case BPF_ST | BPF_MEM | BPF_H:
762 PPC_LI32(_R0, imm);
763 EMIT(PPC_RAW_STH(_R0, dst_reg, off));
764 break;
765 case BPF_STX | BPF_MEM | BPF_W:
766 EMIT(PPC_RAW_STW(src_reg, dst_reg, off));
767 break;
768 case BPF_ST | BPF_MEM | BPF_W:
769 PPC_LI32(_R0, imm);
770 EMIT(PPC_RAW_STW(_R0, dst_reg, off));
771 break;
772 case BPF_STX | BPF_MEM | BPF_DW:
773 EMIT(PPC_RAW_STW(src_reg_h, dst_reg, off));
774 EMIT(PPC_RAW_STW(src_reg, dst_reg, off + 4));
775 break;
776 case BPF_ST | BPF_MEM | BPF_DW:
777 PPC_LI32(_R0, imm);
778 EMIT(PPC_RAW_STW(_R0, dst_reg, off + 4));
779 PPC_EX32(_R0, imm);
780 EMIT(PPC_RAW_STW(_R0, dst_reg, off));
781 break;
782
783
784
785
786 case BPF_STX | BPF_ATOMIC | BPF_W:
787 if (imm != BPF_ADD) {
788 pr_err_ratelimited("eBPF filter atomic op code %02x (@%d) unsupported\n",
789 code, i);
790 return -ENOTSUPP;
791 }
792
793
794
795 bpf_set_seen_register(ctx, tmp_reg);
796
797 EMIT(PPC_RAW_LI(tmp_reg, off));
798
799 EMIT(PPC_RAW_LWARX(_R0, tmp_reg, dst_reg, 0));
800
801 EMIT(PPC_RAW_ADD(_R0, _R0, src_reg));
802
803 EMIT(PPC_RAW_STWCX(_R0, tmp_reg, dst_reg));
804
805 PPC_BCC_SHORT(COND_NE, (ctx->idx - 3) * 4);
806 break;
807
808 case BPF_STX | BPF_ATOMIC | BPF_DW:
809 return -EOPNOTSUPP;
810
811
812
813
814 case BPF_LDX | BPF_MEM | BPF_B:
815 EMIT(PPC_RAW_LBZ(dst_reg, src_reg, off));
816 if (!fp->aux->verifier_zext)
817 EMIT(PPC_RAW_LI(dst_reg_h, 0));
818 break;
819 case BPF_LDX | BPF_MEM | BPF_H:
820 EMIT(PPC_RAW_LHZ(dst_reg, src_reg, off));
821 if (!fp->aux->verifier_zext)
822 EMIT(PPC_RAW_LI(dst_reg_h, 0));
823 break;
824 case BPF_LDX | BPF_MEM | BPF_W:
825 EMIT(PPC_RAW_LWZ(dst_reg, src_reg, off));
826 if (!fp->aux->verifier_zext)
827 EMIT(PPC_RAW_LI(dst_reg_h, 0));
828 break;
829 case BPF_LDX | BPF_MEM | BPF_DW:
830 EMIT(PPC_RAW_LWZ(dst_reg_h, src_reg, off));
831 EMIT(PPC_RAW_LWZ(dst_reg, src_reg, off + 4));
832 break;
833
834
835
836
837
838 case BPF_LD | BPF_IMM | BPF_DW:
839 PPC_LI32(dst_reg_h, (u32)insn[i + 1].imm);
840 PPC_LI32(dst_reg, (u32)insn[i].imm);
841
842 addrs[++i] = ctx->idx * 4;
843 break;
844
845
846
847
848 case BPF_JMP | BPF_EXIT:
849
850
851
852
853
854 if (i != flen - 1)
855 PPC_JMP(exit_addr);
856
857 break;
858
859
860
861
862 case BPF_JMP | BPF_CALL:
863 ctx->seen |= SEEN_FUNC;
864
865 ret = bpf_jit_get_func_addr(fp, &insn[i], extra_pass,
866 &func_addr, &func_addr_fixed);
867 if (ret < 0)
868 return ret;
869
870 if (bpf_is_seen_register(ctx, bpf_to_ppc(ctx, BPF_REG_5))) {
871 EMIT(PPC_RAW_STW(bpf_to_ppc(ctx, BPF_REG_5) - 1, _R1, 8));
872 EMIT(PPC_RAW_STW(bpf_to_ppc(ctx, BPF_REG_5), _R1, 12));
873 }
874
875 bpf_jit_emit_func_call_rel(image, ctx, func_addr);
876
877 EMIT(PPC_RAW_MR(bpf_to_ppc(ctx, BPF_REG_0) - 1, _R3));
878 EMIT(PPC_RAW_MR(bpf_to_ppc(ctx, BPF_REG_0), _R4));
879 break;
880
881
882
883
884 case BPF_JMP | BPF_JA:
885 PPC_JMP(addrs[i + 1 + off]);
886 break;
887
888 case BPF_JMP | BPF_JGT | BPF_K:
889 case BPF_JMP | BPF_JGT | BPF_X:
890 case BPF_JMP | BPF_JSGT | BPF_K:
891 case BPF_JMP | BPF_JSGT | BPF_X:
892 case BPF_JMP32 | BPF_JGT | BPF_K:
893 case BPF_JMP32 | BPF_JGT | BPF_X:
894 case BPF_JMP32 | BPF_JSGT | BPF_K:
895 case BPF_JMP32 | BPF_JSGT | BPF_X:
896 true_cond = COND_GT;
897 goto cond_branch;
898 case BPF_JMP | BPF_JLT | BPF_K:
899 case BPF_JMP | BPF_JLT | BPF_X:
900 case BPF_JMP | BPF_JSLT | BPF_K:
901 case BPF_JMP | BPF_JSLT | BPF_X:
902 case BPF_JMP32 | BPF_JLT | BPF_K:
903 case BPF_JMP32 | BPF_JLT | BPF_X:
904 case BPF_JMP32 | BPF_JSLT | BPF_K:
905 case BPF_JMP32 | BPF_JSLT | BPF_X:
906 true_cond = COND_LT;
907 goto cond_branch;
908 case BPF_JMP | BPF_JGE | BPF_K:
909 case BPF_JMP | BPF_JGE | BPF_X:
910 case BPF_JMP | BPF_JSGE | BPF_K:
911 case BPF_JMP | BPF_JSGE | BPF_X:
912 case BPF_JMP32 | BPF_JGE | BPF_K:
913 case BPF_JMP32 | BPF_JGE | BPF_X:
914 case BPF_JMP32 | BPF_JSGE | BPF_K:
915 case BPF_JMP32 | BPF_JSGE | BPF_X:
916 true_cond = COND_GE;
917 goto cond_branch;
918 case BPF_JMP | BPF_JLE | BPF_K:
919 case BPF_JMP | BPF_JLE | BPF_X:
920 case BPF_JMP | BPF_JSLE | BPF_K:
921 case BPF_JMP | BPF_JSLE | BPF_X:
922 case BPF_JMP32 | BPF_JLE | BPF_K:
923 case BPF_JMP32 | BPF_JLE | BPF_X:
924 case BPF_JMP32 | BPF_JSLE | BPF_K:
925 case BPF_JMP32 | BPF_JSLE | BPF_X:
926 true_cond = COND_LE;
927 goto cond_branch;
928 case BPF_JMP | BPF_JEQ | BPF_K:
929 case BPF_JMP | BPF_JEQ | BPF_X:
930 case BPF_JMP32 | BPF_JEQ | BPF_K:
931 case BPF_JMP32 | BPF_JEQ | BPF_X:
932 true_cond = COND_EQ;
933 goto cond_branch;
934 case BPF_JMP | BPF_JNE | BPF_K:
935 case BPF_JMP | BPF_JNE | BPF_X:
936 case BPF_JMP32 | BPF_JNE | BPF_K:
937 case BPF_JMP32 | BPF_JNE | BPF_X:
938 true_cond = COND_NE;
939 goto cond_branch;
940 case BPF_JMP | BPF_JSET | BPF_K:
941 case BPF_JMP | BPF_JSET | BPF_X:
942 case BPF_JMP32 | BPF_JSET | BPF_K:
943 case BPF_JMP32 | BPF_JSET | BPF_X:
944 true_cond = COND_NE;
945
946
947cond_branch:
948 switch (code) {
949 case BPF_JMP | BPF_JGT | BPF_X:
950 case BPF_JMP | BPF_JLT | BPF_X:
951 case BPF_JMP | BPF_JGE | BPF_X:
952 case BPF_JMP | BPF_JLE | BPF_X:
953 case BPF_JMP | BPF_JEQ | BPF_X:
954 case BPF_JMP | BPF_JNE | BPF_X:
955
956 EMIT(PPC_RAW_CMPLW(dst_reg_h, src_reg_h));
957 PPC_BCC_SHORT(COND_NE, (ctx->idx + 2) * 4);
958 EMIT(PPC_RAW_CMPLW(dst_reg, src_reg));
959 break;
960 case BPF_JMP32 | BPF_JGT | BPF_X:
961 case BPF_JMP32 | BPF_JLT | BPF_X:
962 case BPF_JMP32 | BPF_JGE | BPF_X:
963 case BPF_JMP32 | BPF_JLE | BPF_X:
964 case BPF_JMP32 | BPF_JEQ | BPF_X:
965 case BPF_JMP32 | BPF_JNE | BPF_X:
966
967 EMIT(PPC_RAW_CMPLW(dst_reg, src_reg));
968 break;
969 case BPF_JMP | BPF_JSGT | BPF_X:
970 case BPF_JMP | BPF_JSLT | BPF_X:
971 case BPF_JMP | BPF_JSGE | BPF_X:
972 case BPF_JMP | BPF_JSLE | BPF_X:
973
974 EMIT(PPC_RAW_CMPW(dst_reg_h, src_reg_h));
975 PPC_BCC_SHORT(COND_NE, (ctx->idx + 2) * 4);
976 EMIT(PPC_RAW_CMPLW(dst_reg, src_reg));
977 break;
978 case BPF_JMP32 | BPF_JSGT | BPF_X:
979 case BPF_JMP32 | BPF_JSLT | BPF_X:
980 case BPF_JMP32 | BPF_JSGE | BPF_X:
981 case BPF_JMP32 | BPF_JSLE | BPF_X:
982
983 EMIT(PPC_RAW_CMPW(dst_reg, src_reg));
984 break;
985 case BPF_JMP | BPF_JSET | BPF_X:
986 EMIT(PPC_RAW_AND_DOT(_R0, dst_reg_h, src_reg_h));
987 PPC_BCC_SHORT(COND_NE, (ctx->idx + 2) * 4);
988 EMIT(PPC_RAW_AND_DOT(_R0, dst_reg, src_reg));
989 break;
990 case BPF_JMP32 | BPF_JSET | BPF_X: {
991 EMIT(PPC_RAW_AND_DOT(_R0, dst_reg, src_reg));
992 break;
993 case BPF_JMP | BPF_JNE | BPF_K:
994 case BPF_JMP | BPF_JEQ | BPF_K:
995 case BPF_JMP | BPF_JGT | BPF_K:
996 case BPF_JMP | BPF_JLT | BPF_K:
997 case BPF_JMP | BPF_JGE | BPF_K:
998 case BPF_JMP | BPF_JLE | BPF_K:
999
1000
1001
1002
1003 if (imm >= 0 && imm < 32768) {
1004 EMIT(PPC_RAW_CMPLWI(dst_reg_h, 0));
1005 PPC_BCC_SHORT(COND_NE, (ctx->idx + 2) * 4);
1006 EMIT(PPC_RAW_CMPLWI(dst_reg, imm));
1007 } else {
1008
1009 PPC_EX32(_R0, imm);
1010 EMIT(PPC_RAW_CMPLW(dst_reg_h, _R0));
1011 PPC_LI32(_R0, imm);
1012 PPC_BCC_SHORT(COND_NE, (ctx->idx + 2) * 4);
1013 EMIT(PPC_RAW_CMPLW(dst_reg, _R0));
1014 }
1015 break;
1016 case BPF_JMP32 | BPF_JNE | BPF_K:
1017 case BPF_JMP32 | BPF_JEQ | BPF_K:
1018 case BPF_JMP32 | BPF_JGT | BPF_K:
1019 case BPF_JMP32 | BPF_JLT | BPF_K:
1020 case BPF_JMP32 | BPF_JGE | BPF_K:
1021 case BPF_JMP32 | BPF_JLE | BPF_K:
1022 if (imm >= 0 && imm < 65536) {
1023 EMIT(PPC_RAW_CMPLWI(dst_reg, imm));
1024 } else {
1025 PPC_LI32(_R0, imm);
1026 EMIT(PPC_RAW_CMPLW(dst_reg, _R0));
1027 }
1028 break;
1029 }
1030 case BPF_JMP | BPF_JSGT | BPF_K:
1031 case BPF_JMP | BPF_JSLT | BPF_K:
1032 case BPF_JMP | BPF_JSGE | BPF_K:
1033 case BPF_JMP | BPF_JSLE | BPF_K:
1034 if (imm >= 0 && imm < 65536) {
1035 EMIT(PPC_RAW_CMPWI(dst_reg_h, imm < 0 ? -1 : 0));
1036 PPC_BCC_SHORT(COND_NE, (ctx->idx + 2) * 4);
1037 EMIT(PPC_RAW_CMPLWI(dst_reg, imm));
1038 } else {
1039
1040 EMIT(PPC_RAW_CMPWI(dst_reg_h, imm < 0 ? -1 : 0));
1041 PPC_LI32(_R0, imm);
1042 PPC_BCC_SHORT(COND_NE, (ctx->idx + 2) * 4);
1043 EMIT(PPC_RAW_CMPLW(dst_reg, _R0));
1044 }
1045 break;
1046 case BPF_JMP32 | BPF_JSGT | BPF_K:
1047 case BPF_JMP32 | BPF_JSLT | BPF_K:
1048 case BPF_JMP32 | BPF_JSGE | BPF_K:
1049 case BPF_JMP32 | BPF_JSLE | BPF_K:
1050
1051
1052
1053
1054 if (imm >= -32768 && imm < 32768) {
1055 EMIT(PPC_RAW_CMPWI(dst_reg, imm));
1056 } else {
1057
1058 PPC_LI32(_R0, imm);
1059 EMIT(PPC_RAW_CMPW(dst_reg, _R0));
1060 }
1061 break;
1062 case BPF_JMP | BPF_JSET | BPF_K:
1063
1064 if (imm >= 0 && imm < 32768) {
1065
1066 EMIT(PPC_RAW_ANDI(_R0, dst_reg, imm));
1067 } else {
1068 PPC_LI32(_R0, imm);
1069 if (imm < 0) {
1070 EMIT(PPC_RAW_CMPWI(dst_reg_h, 0));
1071 PPC_BCC_SHORT(COND_NE, (ctx->idx + 2) * 4);
1072 }
1073 EMIT(PPC_RAW_AND_DOT(_R0, dst_reg, _R0));
1074 }
1075 break;
1076 case BPF_JMP32 | BPF_JSET | BPF_K:
1077
1078 if (imm >= 0 && imm < 32768) {
1079
1080 EMIT(PPC_RAW_ANDI(_R0, dst_reg, imm));
1081 } else {
1082 PPC_LI32(_R0, imm);
1083 EMIT(PPC_RAW_AND_DOT(_R0, dst_reg, _R0));
1084 }
1085 break;
1086 }
1087 PPC_BCC(true_cond, addrs[i + 1 + off]);
1088 break;
1089
1090
1091
1092
1093 case BPF_JMP | BPF_TAIL_CALL:
1094 ctx->seen |= SEEN_TAILCALL;
1095 ret = bpf_jit_emit_tail_call(image, ctx, addrs[i + 1]);
1096 if (ret < 0)
1097 return ret;
1098 break;
1099
1100 default:
1101
1102
1103
1104
1105
1106 pr_err_ratelimited("eBPF filter opcode %04x (@%d) unsupported\n", code, i);
1107 return -EOPNOTSUPP;
1108 }
1109 if (BPF_CLASS(code) == BPF_ALU && !fp->aux->verifier_zext &&
1110 !insn_is_zext(&insn[i + 1]) && !(BPF_OP(code) == BPF_END && imm == 64))
1111 EMIT(PPC_RAW_LI(dst_reg_h, 0));
1112 }
1113
1114
1115 addrs[i] = ctx->idx * 4;
1116
1117 return 0;
1118}
1119