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9
10#include <endian.h>
11
12#if defined(__BYTE_ORDER) ? (__BYTE_ORDER == __LITTLE_ENDIAN) : defined(__LITTLE_ENDIAN)
13#define RSEQ_SIG 0xf1401073
14#else
15#error "Currently, RSEQ only supports Little-Endian version"
16#endif
17
18#if __riscv_xlen == 64
19#define __REG_SEL(a, b) a
20#elif __riscv_xlen == 32
21#define __REG_SEL(a, b) b
22#endif
23
24#define REG_L __REG_SEL("ld ", "lw ")
25#define REG_S __REG_SEL("sd ", "sw ")
26
27#define RISCV_FENCE(p, s) \
28 __asm__ __volatile__ ("fence " #p "," #s : : : "memory")
29#define rseq_smp_mb() RISCV_FENCE(rw, rw)
30#define rseq_smp_rmb() RISCV_FENCE(r, r)
31#define rseq_smp_wmb() RISCV_FENCE(w, w)
32#define RSEQ_ASM_TMP_REG_1 "t6"
33#define RSEQ_ASM_TMP_REG_2 "t5"
34#define RSEQ_ASM_TMP_REG_3 "t4"
35#define RSEQ_ASM_TMP_REG_4 "t3"
36
37#define rseq_smp_load_acquire(p) \
38__extension__ ({ \
39 __typeof(*(p)) ____p1 = RSEQ_READ_ONCE(*(p)); \
40 RISCV_FENCE(r, rw) \
41 ____p1; \
42})
43
44#define rseq_smp_acquire__after_ctrl_dep() rseq_smp_rmb()
45
46#define rseq_smp_store_release(p, v) \
47do { \
48 RISCV_FENCE(rw, w); \
49 RSEQ_WRITE_ONCE(*(p), v); \
50} while (0)
51
52#ifdef RSEQ_SKIP_FASTPATH
53#include "rseq-skip.h"
54#else
55
56#define __RSEQ_ASM_DEFINE_TABLE(label, version, flags, start_ip, \
57 post_commit_offset, abort_ip) \
58 ".pushsection __rseq_cs, \"aw\"\n" \
59 ".balign 32\n" \
60 __rseq_str(label) ":\n" \
61 ".long " __rseq_str(version) ", " __rseq_str(flags) "\n" \
62 ".quad " __rseq_str(start_ip) ", " \
63 __rseq_str(post_commit_offset) ", " \
64 __rseq_str(abort_ip) "\n" \
65 ".popsection\n\t" \
66 ".pushsection __rseq_cs_ptr_array, \"aw\"\n" \
67 ".quad " __rseq_str(label) "b\n" \
68 ".popsection\n"
69
70#define RSEQ_ASM_DEFINE_TABLE(label, start_ip, post_commit_ip, abort_ip) \
71 __RSEQ_ASM_DEFINE_TABLE(label, 0x0, 0x0, start_ip, \
72 ((post_commit_ip) - (start_ip)), abort_ip)
73
74
75
76
77
78
79
80
81
82#define RSEQ_ASM_DEFINE_EXIT_POINT(start_ip, exit_ip) \
83 ".pushsection __rseq_exit_point_array, \"aw\"\n" \
84 ".quad " __rseq_str(start_ip) ", " __rseq_str(exit_ip) "\n" \
85 ".popsection\n"
86
87#define RSEQ_ASM_STORE_RSEQ_CS(label, cs_label, rseq_cs) \
88 RSEQ_INJECT_ASM(1) \
89 "la "RSEQ_ASM_TMP_REG_1 ", " __rseq_str(cs_label) "\n" \
90 REG_S RSEQ_ASM_TMP_REG_1 ", %[" __rseq_str(rseq_cs) "]\n" \
91 __rseq_str(label) ":\n"
92
93#define RSEQ_ASM_DEFINE_ABORT(label, abort_label) \
94 "j 222f\n" \
95 ".balign 4\n" \
96 ".long " __rseq_str(RSEQ_SIG) "\n" \
97 __rseq_str(label) ":\n" \
98 "j %l[" __rseq_str(abort_label) "]\n" \
99 "222:\n"
100
101#define RSEQ_ASM_OP_STORE(value, var) \
102 REG_S "%[" __rseq_str(value) "], %[" __rseq_str(var) "]\n"
103
104#define RSEQ_ASM_OP_CMPEQ(var, expect, label) \
105 REG_L RSEQ_ASM_TMP_REG_1 ", %[" __rseq_str(var) "]\n" \
106 "bne "RSEQ_ASM_TMP_REG_1 ", %[" __rseq_str(expect) "] ," \
107 __rseq_str(label) "\n"
108
109#define RSEQ_ASM_OP_CMPEQ32(var, expect, label) \
110 "lw "RSEQ_ASM_TMP_REG_1 ", %[" __rseq_str(var) "]\n" \
111 "bne "RSEQ_ASM_TMP_REG_1 ", %[" __rseq_str(expect) "] ," \
112 __rseq_str(label) "\n"
113
114#define RSEQ_ASM_OP_CMPNE(var, expect, label) \
115 REG_L RSEQ_ASM_TMP_REG_1 ", %[" __rseq_str(var) "]\n" \
116 "beq "RSEQ_ASM_TMP_REG_1 ", %[" __rseq_str(expect) "] ," \
117 __rseq_str(label) "\n"
118
119#define RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, label) \
120 RSEQ_INJECT_ASM(2) \
121 RSEQ_ASM_OP_CMPEQ32(current_cpu_id, cpu_id, label)
122
123#define RSEQ_ASM_OP_R_LOAD(var) \
124 REG_L RSEQ_ASM_TMP_REG_1 ", %[" __rseq_str(var) "]\n"
125
126#define RSEQ_ASM_OP_R_STORE(var) \
127 REG_S RSEQ_ASM_TMP_REG_1 ", %[" __rseq_str(var) "]\n"
128
129#define RSEQ_ASM_OP_R_LOAD_OFF(offset) \
130 "add "RSEQ_ASM_TMP_REG_1 ", %[" __rseq_str(offset) "], " \
131 RSEQ_ASM_TMP_REG_1 "\n" \
132 REG_L RSEQ_ASM_TMP_REG_1 ", (" RSEQ_ASM_TMP_REG_1 ")\n"
133
134#define RSEQ_ASM_OP_R_ADD(count) \
135 "add "RSEQ_ASM_TMP_REG_1 ", " RSEQ_ASM_TMP_REG_1 \
136 ", %[" __rseq_str(count) "]\n"
137
138#define RSEQ_ASM_OP_FINAL_STORE(value, var, post_commit_label) \
139 RSEQ_ASM_OP_STORE(value, var) \
140 __rseq_str(post_commit_label) ":\n"
141
142#define RSEQ_ASM_OP_FINAL_STORE_RELEASE(value, var, post_commit_label) \
143 "fence rw, w\n" \
144 RSEQ_ASM_OP_STORE(value, var) \
145 __rseq_str(post_commit_label) ":\n"
146
147#define RSEQ_ASM_OP_R_FINAL_STORE(var, post_commit_label) \
148 REG_S RSEQ_ASM_TMP_REG_1 ", %[" __rseq_str(var) "]\n" \
149 __rseq_str(post_commit_label) ":\n"
150
151#define RSEQ_ASM_OP_R_BAD_MEMCPY(dst, src, len) \
152 "beqz %[" __rseq_str(len) "], 333f\n" \
153 "mv " RSEQ_ASM_TMP_REG_1 ", %[" __rseq_str(len) "]\n" \
154 "mv " RSEQ_ASM_TMP_REG_2 ", %[" __rseq_str(src) "]\n" \
155 "mv " RSEQ_ASM_TMP_REG_3 ", %[" __rseq_str(dst) "]\n" \
156 "222:\n" \
157 "lb " RSEQ_ASM_TMP_REG_4 ", 0(" RSEQ_ASM_TMP_REG_2 ")\n" \
158 "sb " RSEQ_ASM_TMP_REG_4 ", 0(" RSEQ_ASM_TMP_REG_3 ")\n" \
159 "addi " RSEQ_ASM_TMP_REG_1 ", " RSEQ_ASM_TMP_REG_1 ", -1\n" \
160 "addi " RSEQ_ASM_TMP_REG_2 ", " RSEQ_ASM_TMP_REG_2 ", 1\n" \
161 "addi " RSEQ_ASM_TMP_REG_3 ", " RSEQ_ASM_TMP_REG_3 ", 1\n" \
162 "bnez " RSEQ_ASM_TMP_REG_1 ", 222b\n" \
163 "333:\n"
164
165#define RSEQ_ASM_OP_R_DEREF_ADDV(ptr, off, post_commit_label) \
166 "mv " RSEQ_ASM_TMP_REG_1 ", %[" __rseq_str(ptr) "]\n" \
167 RSEQ_ASM_OP_R_ADD(off) \
168 REG_L RSEQ_ASM_TMP_REG_1 ", 0(" RSEQ_ASM_TMP_REG_1 ")\n" \
169 RSEQ_ASM_OP_R_ADD(inc) \
170 __rseq_str(post_commit_label) ":\n"
171
172static inline __always_inline
173int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
174{
175 RSEQ_INJECT_C(9)
176
177 __asm__ __volatile__ goto(RSEQ_ASM_DEFINE_TABLE(1, 2f, 3f, 4f)
178 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[cmpfail]")
179#ifdef RSEQ_COMPARE_TWICE
180 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[error1]")
181 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[error2]")
182#endif
183 RSEQ_ASM_STORE_RSEQ_CS(2, 1b, rseq_cs)
184 RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
185 RSEQ_INJECT_ASM(3)
186 RSEQ_ASM_OP_CMPEQ(v, expect, "%l[cmpfail]")
187 RSEQ_INJECT_ASM(4)
188#ifdef RSEQ_COMPARE_TWICE
189 RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, "%l[error1]")
190 RSEQ_ASM_OP_CMPEQ(v, expect, "%l[error2]")
191#endif
192 RSEQ_ASM_OP_FINAL_STORE(newv, v, 3)
193 RSEQ_INJECT_ASM(5)
194 RSEQ_ASM_DEFINE_ABORT(4, abort)
195 :
196 : [cpu_id] "r" (cpu),
197 [current_cpu_id] "m" (__rseq_abi.cpu_id),
198 [rseq_cs] "m" (__rseq_abi.rseq_cs),
199 [v] "m" (*v),
200 [expect] "r" (expect),
201 [newv] "r" (newv)
202 RSEQ_INJECT_INPUT
203 : "memory", RSEQ_ASM_TMP_REG_1
204 RSEQ_INJECT_CLOBBER
205 : abort, cmpfail
206#ifdef RSEQ_COMPARE_TWICE
207 , error1, error2
208#endif
209 );
210
211 return 0;
212abort:
213 RSEQ_INJECT_FAILED
214 return -1;
215cmpfail:
216 return 1;
217#ifdef RSEQ_COMPARE_TWICE
218error1:
219 rseq_bug("cpu_id comparison failed");
220error2:
221 rseq_bug("expected value comparison failed");
222#endif
223}
224
225static inline __always_inline
226int rseq_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
227 off_t voffp, intptr_t *load, int cpu)
228{
229 RSEQ_INJECT_C(9)
230
231 __asm__ __volatile__ goto(RSEQ_ASM_DEFINE_TABLE(1, 2f, 3f, 4f)
232 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[cmpfail]")
233#ifdef RSEQ_COMPARE_TWICE
234 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[error1]")
235 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[error2]")
236#endif
237 RSEQ_ASM_STORE_RSEQ_CS(2, 1b, rseq_cs)
238 RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
239 RSEQ_INJECT_ASM(3)
240 RSEQ_ASM_OP_CMPNE(v, expectnot, "%l[cmpfail]")
241 RSEQ_INJECT_ASM(4)
242#ifdef RSEQ_COMPARE_TWICE
243 RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, "%l[error1]")
244 RSEQ_ASM_OP_CMPNE(v, expectnot, "%l[error2]")
245#endif
246 RSEQ_ASM_OP_R_LOAD(v)
247 RSEQ_ASM_OP_R_STORE(load)
248 RSEQ_ASM_OP_R_LOAD_OFF(voffp)
249 RSEQ_ASM_OP_R_FINAL_STORE(v, 3)
250 RSEQ_INJECT_ASM(5)
251 RSEQ_ASM_DEFINE_ABORT(4, abort)
252 :
253 : [cpu_id] "r" (cpu),
254 [current_cpu_id] "m" (__rseq_abi.cpu_id),
255 [rseq_cs] "m" (__rseq_abi.rseq_cs),
256 [v] "m" (*v),
257 [expectnot] "r" (expectnot),
258 [load] "m" (*load),
259 [voffp] "r" (voffp)
260 RSEQ_INJECT_INPUT
261 : "memory", RSEQ_ASM_TMP_REG_1
262 RSEQ_INJECT_CLOBBER
263 : abort, cmpfail
264#ifdef RSEQ_COMPARE_TWICE
265 , error1, error2
266#endif
267 );
268 return 0;
269abort:
270 RSEQ_INJECT_FAILED
271 return -1;
272cmpfail:
273 return 1;
274#ifdef RSEQ_COMPARE_TWICE
275error1:
276 rseq_bug("cpu_id comparison failed");
277error2:
278 rseq_bug("expected value comparison failed");
279#endif
280}
281
282static inline __always_inline
283int rseq_addv(intptr_t *v, intptr_t count, int cpu)
284{
285 RSEQ_INJECT_C(9)
286
287 __asm__ __volatile__ goto(RSEQ_ASM_DEFINE_TABLE(1, 2f, 3f, 4f)
288#ifdef RSEQ_COMPARE_TWICE
289 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[error1]")
290#endif
291 RSEQ_ASM_STORE_RSEQ_CS(2, 1b, rseq_cs)
292 RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
293 RSEQ_INJECT_ASM(3)
294#ifdef RSEQ_COMPARE_TWICE
295 RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, "%l[error1]")
296#endif
297 RSEQ_ASM_OP_R_LOAD(v)
298 RSEQ_ASM_OP_R_ADD(count)
299 RSEQ_ASM_OP_R_FINAL_STORE(v, 3)
300 RSEQ_INJECT_ASM(4)
301 RSEQ_ASM_DEFINE_ABORT(4, abort)
302 :
303 : [cpu_id] "r" (cpu),
304 [current_cpu_id] "m" (__rseq_abi.cpu_id),
305 [rseq_cs] "m" (__rseq_abi.rseq_cs),
306 [v] "m" (*v),
307 [count] "r" (count)
308 RSEQ_INJECT_INPUT
309 : "memory", RSEQ_ASM_TMP_REG_1
310 RSEQ_INJECT_CLOBBER
311 : abort
312#ifdef RSEQ_COMPARE_TWICE
313 , error1
314#endif
315 );
316 return 0;
317abort:
318 RSEQ_INJECT_FAILED
319 return -1;
320#ifdef RSEQ_COMPARE_TWICE
321error1:
322 rseq_bug("cpu_id comparison failed");
323#endif
324}
325
326static inline __always_inline
327int rseq_cmpeqv_trystorev_storev(intptr_t *v, intptr_t expect,
328 intptr_t *v2, intptr_t newv2,
329 intptr_t newv, int cpu)
330{
331 RSEQ_INJECT_C(9)
332
333 __asm__ __volatile__ goto(RSEQ_ASM_DEFINE_TABLE(1, 2f, 3f, 4f)
334 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[cmpfail]")
335#ifdef RSEQ_COMPARE_TWICE
336 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[error1]")
337 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[error2]")
338#endif
339 RSEQ_ASM_STORE_RSEQ_CS(2, 1b, rseq_cs)
340 RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
341 RSEQ_INJECT_ASM(3)
342 RSEQ_ASM_OP_CMPEQ(v, expect, "%l[cmpfail]")
343 RSEQ_INJECT_ASM(4)
344#ifdef RSEQ_COMPARE_TWICE
345 RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, "%l[error1]")
346 RSEQ_ASM_OP_CMPEQ(v, expect, "%l[error2]")
347#endif
348 RSEQ_ASM_OP_STORE(newv2, v2)
349 RSEQ_INJECT_ASM(5)
350 RSEQ_ASM_OP_FINAL_STORE(newv, v, 3)
351 RSEQ_INJECT_ASM(6)
352 RSEQ_ASM_DEFINE_ABORT(4, abort)
353 :
354 : [cpu_id] "r" (cpu),
355 [current_cpu_id] "m" (__rseq_abi.cpu_id),
356 [rseq_cs] "m" (__rseq_abi.rseq_cs),
357 [expect] "r" (expect),
358 [v] "m" (*v),
359 [newv] "r" (newv),
360 [v2] "m" (*v2),
361 [newv2] "r" (newv2)
362 RSEQ_INJECT_INPUT
363 : "memory", RSEQ_ASM_TMP_REG_1
364 RSEQ_INJECT_CLOBBER
365 : abort, cmpfail
366#ifdef RSEQ_COMPARE_TWICE
367 , error1, error2
368#endif
369 );
370
371 return 0;
372abort:
373 RSEQ_INJECT_FAILED
374 return -1;
375cmpfail:
376 return 1;
377#ifdef RSEQ_COMPARE_TWICE
378error1:
379 rseq_bug("cpu_id comparison failed");
380error2:
381 rseq_bug("expected value comparison failed");
382#endif
383}
384
385static inline __always_inline
386int rseq_cmpeqv_trystorev_storev_release(intptr_t *v, intptr_t expect,
387 intptr_t *v2, intptr_t newv2,
388 intptr_t newv, int cpu)
389{
390 RSEQ_INJECT_C(9)
391
392 __asm__ __volatile__ goto(RSEQ_ASM_DEFINE_TABLE(1, 2f, 3f, 4f)
393 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[cmpfail]")
394#ifdef RSEQ_COMPARE_TWICE
395 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[error1]")
396 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[error2]")
397#endif
398 RSEQ_ASM_STORE_RSEQ_CS(2, 1b, rseq_cs)
399 RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
400 RSEQ_INJECT_ASM(3)
401 RSEQ_ASM_OP_CMPEQ(v, expect, "%l[cmpfail]")
402 RSEQ_INJECT_ASM(4)
403#ifdef RSEQ_COMPARE_TWICE
404 RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, "%l[error1]")
405 RSEQ_ASM_OP_CMPEQ(v, expect, "%l[error2]")
406#endif
407 RSEQ_ASM_OP_STORE(newv2, v2)
408 RSEQ_INJECT_ASM(5)
409 RSEQ_ASM_OP_FINAL_STORE_RELEASE(newv, v, 3)
410 RSEQ_INJECT_ASM(6)
411 RSEQ_ASM_DEFINE_ABORT(4, abort)
412 :
413 : [cpu_id] "r" (cpu),
414 [current_cpu_id] "m" (__rseq_abi.cpu_id),
415 [rseq_cs] "m" (__rseq_abi.rseq_cs),
416 [expect] "r" (expect),
417 [v] "m" (*v),
418 [newv] "r" (newv),
419 [v2] "m" (*v2),
420 [newv2] "r" (newv2)
421 RSEQ_INJECT_INPUT
422 : "memory", RSEQ_ASM_TMP_REG_1
423 RSEQ_INJECT_CLOBBER
424 : abort, cmpfail
425#ifdef RSEQ_COMPARE_TWICE
426 , error1, error2
427#endif
428 );
429
430 return 0;
431abort:
432 RSEQ_INJECT_FAILED
433 return -1;
434cmpfail:
435 return 1;
436#ifdef RSEQ_COMPARE_TWICE
437error1:
438 rseq_bug("cpu_id comparison failed");
439error2:
440 rseq_bug("expected value comparison failed");
441#endif
442}
443
444static inline __always_inline
445int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
446 intptr_t *v2, intptr_t expect2,
447 intptr_t newv, int cpu)
448{
449 RSEQ_INJECT_C(9)
450
451 __asm__ __volatile__ goto(RSEQ_ASM_DEFINE_TABLE(1, 2f, 3f, 4f)
452 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[cmpfail]")
453#ifdef RSEQ_COMPARE_TWICE
454 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[error1]")
455 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[error2]")
456 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[error3]")
457#endif
458 RSEQ_ASM_STORE_RSEQ_CS(2, 1b, rseq_cs)
459 RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
460 RSEQ_INJECT_ASM(3)
461 RSEQ_ASM_OP_CMPEQ(v, expect, "%l[cmpfail]")
462 RSEQ_INJECT_ASM(4)
463 RSEQ_ASM_OP_CMPEQ(v2, expect2, "%l[cmpfail]")
464 RSEQ_INJECT_ASM(5)
465#ifdef RSEQ_COMPARE_TWICE
466 RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, "%l[error1]")
467 RSEQ_ASM_OP_CMPEQ(v, expect, "%l[error2]")
468 RSEQ_ASM_OP_CMPEQ(v2, expect2, "%l[error3]")
469#endif
470 RSEQ_ASM_OP_FINAL_STORE(newv, v, 3)
471 RSEQ_INJECT_ASM(6)
472 RSEQ_ASM_DEFINE_ABORT(4, abort)
473 :
474 : [cpu_id] "r" (cpu),
475 [current_cpu_id] "m" (__rseq_abi.cpu_id),
476 [rseq_cs] "m" (__rseq_abi.rseq_cs),
477 [v] "m" (*v),
478 [expect] "r" (expect),
479 [v2] "m" (*v2),
480 [expect2] "r" (expect2),
481 [newv] "r" (newv)
482 RSEQ_INJECT_INPUT
483 : "memory", RSEQ_ASM_TMP_REG_1
484 RSEQ_INJECT_CLOBBER
485 : abort, cmpfail
486#ifdef RSEQ_COMPARE_TWICE
487 , error1, error2, error3
488#endif
489 );
490
491 return 0;
492abort:
493 RSEQ_INJECT_FAILED
494 return -1;
495cmpfail:
496 return 1;
497#ifdef RSEQ_COMPARE_TWICE
498error1:
499 rseq_bug("cpu_id comparison failed");
500error2:
501 rseq_bug("expected value comparison failed");
502error3:
503 rseq_bug("2nd expected value comparison failed");
504#endif
505}
506
507static inline __always_inline
508int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect,
509 void *dst, void *src, size_t len,
510 intptr_t newv, int cpu)
511{
512 RSEQ_INJECT_C(9)
513 __asm__ __volatile__ goto(RSEQ_ASM_DEFINE_TABLE(1, 2f, 3f, 4f)
514 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[cmpfail]")
515#ifdef RSEQ_COMPARE_TWICE
516 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[error1]")
517 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[error2]")
518#endif
519 RSEQ_ASM_STORE_RSEQ_CS(2, 1b, rseq_cs)
520 RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
521 RSEQ_INJECT_ASM(3)
522 RSEQ_ASM_OP_CMPEQ(v, expect, "%l[cmpfail]")
523 RSEQ_INJECT_ASM(4)
524#ifdef RSEQ_COMPARE_TWICE
525 RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, "%l[error1]")
526 RSEQ_ASM_OP_CMPEQ(v, expect, "%l[error2]")
527#endif
528 RSEQ_ASM_OP_R_BAD_MEMCPY(dst, src, len)
529 RSEQ_INJECT_ASM(5)
530 RSEQ_ASM_OP_FINAL_STORE(newv, v, 3)
531 RSEQ_INJECT_ASM(6)
532 RSEQ_ASM_DEFINE_ABORT(4, abort)
533 :
534 : [cpu_id] "r" (cpu),
535 [current_cpu_id] "m" (__rseq_abi.cpu_id),
536 [rseq_cs] "m" (__rseq_abi.rseq_cs),
537 [expect] "r" (expect),
538 [v] "m" (*v),
539 [newv] "r" (newv),
540 [dst] "r" (dst),
541 [src] "r" (src),
542 [len] "r" (len)
543 RSEQ_INJECT_INPUT
544 : "memory", RSEQ_ASM_TMP_REG_1, RSEQ_ASM_TMP_REG_2,
545 RSEQ_ASM_TMP_REG_3, RSEQ_ASM_TMP_REG_4
546 RSEQ_INJECT_CLOBBER
547 : abort, cmpfail
548#ifdef RSEQ_COMPARE_TWICE
549 , error1, error2
550#endif
551 );
552
553 return 0;
554abort:
555 RSEQ_INJECT_FAILED
556 return -1;
557cmpfail:
558 return 1;
559#ifdef RSEQ_COMPARE_TWICE
560error1:
561 rseq_bug("cpu_id comparison failed");
562error2:
563 rseq_bug("expected value comparison failed");
564#endif
565}
566
567static inline __always_inline
568int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect,
569 void *dst, void *src, size_t len,
570 intptr_t newv, int cpu)
571{
572 RSEQ_INJECT_C(9)
573
574 __asm__ __volatile__ goto(RSEQ_ASM_DEFINE_TABLE(1, 2f, 3f, 4f)
575 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[cmpfail]")
576#ifdef RSEQ_COMPARE_TWICE
577 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[error1]")
578 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[error2]")
579#endif
580 RSEQ_ASM_STORE_RSEQ_CS(2, 1b, rseq_cs)
581 RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
582 RSEQ_INJECT_ASM(3)
583 RSEQ_ASM_OP_CMPEQ(v, expect, "%l[cmpfail]")
584 RSEQ_INJECT_ASM(4)
585#ifdef RSEQ_COMPARE_TWICE
586 RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, "%l[error1]")
587 RSEQ_ASM_OP_CMPEQ(v, expect, "%l[error2]")
588#endif
589 RSEQ_ASM_OP_R_BAD_MEMCPY(dst, src, len)
590 RSEQ_INJECT_ASM(5)
591 RSEQ_ASM_OP_FINAL_STORE_RELEASE(newv, v, 3)
592 RSEQ_INJECT_ASM(6)
593 RSEQ_ASM_DEFINE_ABORT(4, abort)
594 :
595 : [cpu_id] "r" (cpu),
596 [current_cpu_id] "m" (__rseq_abi.cpu_id),
597 [rseq_cs] "m" (__rseq_abi.rseq_cs),
598 [expect] "r" (expect),
599 [v] "m" (*v),
600 [newv] "r" (newv),
601 [dst] "r" (dst),
602 [src] "r" (src),
603 [len] "r" (len)
604 RSEQ_INJECT_INPUT
605 : "memory", RSEQ_ASM_TMP_REG_1, RSEQ_ASM_TMP_REG_2,
606 RSEQ_ASM_TMP_REG_3, RSEQ_ASM_TMP_REG_4
607 RSEQ_INJECT_CLOBBER
608 : abort, cmpfail
609#ifdef RSEQ_COMPARE_TWICE
610 , error1, error2
611#endif
612 );
613
614 return 0;
615abort:
616 RSEQ_INJECT_FAILED
617 return -1;
618cmpfail:
619 return 1;
620#ifdef RSEQ_COMPARE_TWICE
621error1:
622 rseq_bug("cpu_id comparison failed");
623error2:
624 rseq_bug("expected value comparison failed");
625#endif
626}
627
628#define RSEQ_ARCH_HAS_OFFSET_DEREF_ADDV
629
630
631
632
633
634static inline __always_inline
635int rseq_offset_deref_addv(intptr_t *ptr, off_t off, intptr_t inc, int cpu)
636{
637 RSEQ_INJECT_C(9)
638
639 __asm__ __volatile__ goto(RSEQ_ASM_DEFINE_TABLE(1, 2f, 3f, 4f)
640#ifdef RSEQ_COMPARE_TWICE
641 RSEQ_ASM_DEFINE_EXIT_POINT(2f, "%l[error1]")
642#endif
643 RSEQ_ASM_STORE_RSEQ_CS(2, 1b, rseq_cs)
644 RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
645 RSEQ_INJECT_ASM(3)
646#ifdef RSEQ_COMPARE_TWICE
647 RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, "%l[error1]")
648#endif
649 RSEQ_ASM_OP_R_DEREF_ADDV(ptr, off, 3)
650 RSEQ_INJECT_ASM(4)
651 RSEQ_ASM_DEFINE_ABORT(4, abort)
652 :
653 : [cpu_id] "r" (cpu),
654 [current_cpu_id] "m" (__rseq_abi.cpu_id),
655 [rseq_cs] "m" (__rseq_abi.rseq_cs),
656 [ptr] "r" (ptr),
657 [off] "er" (off),
658 [inc] "er" (inc)
659 RSEQ_INJECT_INPUT
660 : "memory", RSEQ_ASM_TMP_REG_1
661 RSEQ_INJECT_CLOBBER
662 : abort
663#ifdef RSEQ_COMPARE_TWICE
664 , error1
665#endif
666 );
667 return 0;
668abort:
669 RSEQ_INJECT_FAILED
670 return -1;
671#ifdef RSEQ_COMPARE_TWICE
672error1:
673 rseq_bug("cpu_id comparison failed");
674#endif
675}
676
677#endif
678
