Commit | Line | Data |
---|---|---|
744d0b8b | 1 | /* SPDX-License-Identifier: LGPL-2.1-only OR MIT */ |
784b0012 MD |
2 | /* |
3 | * rseq-ppc.h | |
4 | * | |
5 | * (C) Copyright 2016-2018 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
6 | * (C) Copyright 2016-2018 - Boqun Feng <boqun.feng@gmail.com> | |
7 | */ | |
8 | ||
0158e666 MD |
9 | /* |
10 | * RSEQ_SIG is used with the following trap instruction: | |
11 | * | |
12 | * powerpc-be: 0f e5 00 0b twui r5,11 | |
13 | * powerpc64-le: 0b 00 e5 0f twui r5,11 | |
14 | * powerpc64-be: 0f e5 00 0b twui r5,11 | |
15 | */ | |
16 | ||
17 | #define RSEQ_SIG 0x0fe5000b | |
784b0012 MD |
18 | |
19 | #define rseq_smp_mb() __asm__ __volatile__ ("sync" ::: "memory", "cc") | |
20 | #define rseq_smp_lwsync() __asm__ __volatile__ ("lwsync" ::: "memory", "cc") | |
21 | #define rseq_smp_rmb() rseq_smp_lwsync() | |
22 | #define rseq_smp_wmb() rseq_smp_lwsync() | |
23 | ||
24 | #define rseq_smp_load_acquire(p) \ | |
25 | __extension__ ({ \ | |
26 | __typeof(*p) ____p1 = RSEQ_READ_ONCE(*p); \ | |
27 | rseq_smp_lwsync(); \ | |
28 | ____p1; \ | |
29 | }) | |
30 | ||
31 | #define rseq_smp_acquire__after_ctrl_dep() rseq_smp_lwsync() | |
32 | ||
33 | #define rseq_smp_store_release(p, v) \ | |
34 | do { \ | |
35 | rseq_smp_lwsync(); \ | |
36 | RSEQ_WRITE_ONCE(*p, v); \ | |
37 | } while (0) | |
38 | ||
39 | #ifdef RSEQ_SKIP_FASTPATH | |
40 | #include "rseq-skip.h" | |
41 | #else /* !RSEQ_SKIP_FASTPATH */ | |
42 | ||
43 | /* | |
dd01d0fb MD |
44 | * The __rseq_cs_ptr_array and __rseq_cs sections can be used by debuggers to |
45 | * better handle single-stepping through the restartable critical sections. | |
784b0012 MD |
46 | */ |
47 | ||
48 | #ifdef __PPC64__ | |
49 | ||
50 | #define STORE_WORD "std " | |
51 | #define LOAD_WORD "ld " | |
52 | #define LOADX_WORD "ldx " | |
53 | #define CMP_WORD "cmpd " | |
54 | ||
55 | #define __RSEQ_ASM_DEFINE_TABLE(label, version, flags, \ | |
56 | start_ip, post_commit_offset, abort_ip) \ | |
dd01d0fb | 57 | ".pushsection __rseq_cs, \"aw\"\n\t" \ |
784b0012 MD |
58 | ".balign 32\n\t" \ |
59 | __rseq_str(label) ":\n\t" \ | |
60 | ".long " __rseq_str(version) ", " __rseq_str(flags) "\n\t" \ | |
61 | ".quad " __rseq_str(start_ip) ", " __rseq_str(post_commit_offset) ", " __rseq_str(abort_ip) "\n\t" \ | |
dd01d0fb MD |
62 | ".popsection\n\t" \ |
63 | ".pushsection __rseq_cs_ptr_array, \"aw\"\n\t" \ | |
64 | ".quad " __rseq_str(label) "b\n\t" \ | |
784b0012 MD |
65 | ".popsection\n\t" |
66 | ||
67 | #define RSEQ_ASM_STORE_RSEQ_CS(label, cs_label, rseq_cs) \ | |
68 | RSEQ_INJECT_ASM(1) \ | |
69 | "lis %%r17, (" __rseq_str(cs_label) ")@highest\n\t" \ | |
70 | "ori %%r17, %%r17, (" __rseq_str(cs_label) ")@higher\n\t" \ | |
71 | "rldicr %%r17, %%r17, 32, 31\n\t" \ | |
72 | "oris %%r17, %%r17, (" __rseq_str(cs_label) ")@high\n\t" \ | |
73 | "ori %%r17, %%r17, (" __rseq_str(cs_label) ")@l\n\t" \ | |
74 | "std %%r17, %[" __rseq_str(rseq_cs) "]\n\t" \ | |
75 | __rseq_str(label) ":\n\t" | |
76 | ||
90d9876e MD |
77 | /* |
78 | * Exit points of a rseq critical section consist of all instructions outside | |
fd622cad MD |
79 | * of the critical section where a critical section can either branch to or |
80 | * reach through the normal course of its execution. The abort IP and the | |
81 | * post-commit IP are already part of the __rseq_cs section and should not be | |
82 | * explicitly defined as additional exit points. Knowing all exit points is | |
83 | * useful to assist debuggers stepping over the critical section. | |
90d9876e MD |
84 | */ |
85 | #define RSEQ_ASM_DEFINE_EXIT_POINT(start_ip, exit_ip) \ | |
86 | ".pushsection __rseq_exit_point_array, \"aw\"\n\t" \ | |
87 | ".quad " __rseq_str(start_ip) ", " __rseq_str(exit_ip) "\n\t" \ | |
88 | ".popsection\n\t" | |
89 | ||
784b0012 MD |
90 | #else /* #ifdef __PPC64__ */ |
91 | ||
92 | #define STORE_WORD "stw " | |
93 | #define LOAD_WORD "lwz " | |
94 | #define LOADX_WORD "lwzx " | |
95 | #define CMP_WORD "cmpw " | |
96 | ||
97 | #define __RSEQ_ASM_DEFINE_TABLE(label, version, flags, \ | |
98 | start_ip, post_commit_offset, abort_ip) \ | |
dd01d0fb | 99 | ".pushsection __rseq_cs, \"aw\"\n\t" \ |
784b0012 MD |
100 | ".balign 32\n\t" \ |
101 | __rseq_str(label) ":\n\t" \ | |
102 | ".long " __rseq_str(version) ", " __rseq_str(flags) "\n\t" \ | |
103 | /* 32-bit only supported on BE */ \ | |
104 | ".long 0x0, " __rseq_str(start_ip) ", 0x0, " __rseq_str(post_commit_offset) ", 0x0, " __rseq_str(abort_ip) "\n\t" \ | |
dd01d0fb MD |
105 | ".popsection\n\t" \ |
106 | ".pushsection __rseq_cs_ptr_array, \"aw\"\n\t" \ | |
107 | ".long 0x0, " __rseq_str(label) "b\n\t" \ | |
784b0012 MD |
108 | ".popsection\n\t" |
109 | ||
90d9876e MD |
110 | /* |
111 | * Exit points of a rseq critical section consist of all instructions outside | |
fd622cad MD |
112 | * of the critical section where a critical section can either branch to or |
113 | * reach through the normal course of its execution. The abort IP and the | |
114 | * post-commit IP are already part of the __rseq_cs section and should not be | |
115 | * explicitly defined as additional exit points. Knowing all exit points is | |
116 | * useful to assist debuggers stepping over the critical section. | |
90d9876e MD |
117 | */ |
118 | #define RSEQ_ASM_DEFINE_EXIT_POINT(start_ip, exit_ip) \ | |
119 | ".pushsection __rseq_exit_point_array, \"aw\"\n\t" \ | |
120 | /* 32-bit only supported on BE */ \ | |
121 | ".long 0x0, " __rseq_str(start_ip) ", 0x0, " __rseq_str(exit_ip) "\n\t" \ | |
122 | ".popsection\n\t" | |
123 | ||
784b0012 MD |
124 | #define RSEQ_ASM_STORE_RSEQ_CS(label, cs_label, rseq_cs) \ |
125 | RSEQ_INJECT_ASM(1) \ | |
126 | "lis %%r17, (" __rseq_str(cs_label) ")@ha\n\t" \ | |
127 | "addi %%r17, %%r17, (" __rseq_str(cs_label) ")@l\n\t" \ | |
128 | "stw %%r17, %[" __rseq_str(rseq_cs) "]\n\t" \ | |
129 | __rseq_str(label) ":\n\t" | |
130 | ||
131 | #endif /* #ifdef __PPC64__ */ | |
132 | ||
133 | #define RSEQ_ASM_DEFINE_TABLE(label, start_ip, post_commit_ip, abort_ip) \ | |
134 | __RSEQ_ASM_DEFINE_TABLE(label, 0x0, 0x0, start_ip, \ | |
135 | (post_commit_ip - start_ip), abort_ip) | |
136 | ||
137 | #define RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, label) \ | |
138 | RSEQ_INJECT_ASM(2) \ | |
139 | "lwz %%r17, %[" __rseq_str(current_cpu_id) "]\n\t" \ | |
140 | "cmpw cr7, %[" __rseq_str(cpu_id) "], %%r17\n\t" \ | |
141 | "bne- cr7, " __rseq_str(label) "\n\t" | |
142 | ||
143 | #define RSEQ_ASM_DEFINE_ABORT(label, abort_label) \ | |
144 | ".pushsection __rseq_failure, \"ax\"\n\t" \ | |
145 | ".long " __rseq_str(RSEQ_SIG) "\n\t" \ | |
146 | __rseq_str(label) ":\n\t" \ | |
147 | "b %l[" __rseq_str(abort_label) "]\n\t" \ | |
148 | ".popsection\n\t" | |
149 | ||
150 | /* | |
151 | * RSEQ_ASM_OPs: asm operations for rseq | |
152 | * RSEQ_ASM_OP_R_*: has hard-code registers in it | |
153 | * RSEQ_ASM_OP_* (else): doesn't have hard-code registers(unless cr7) | |
154 | */ | |
155 | #define RSEQ_ASM_OP_CMPEQ(var, expect, label) \ | |
156 | LOAD_WORD "%%r17, %[" __rseq_str(var) "]\n\t" \ | |
157 | CMP_WORD "cr7, %%r17, %[" __rseq_str(expect) "]\n\t" \ | |
158 | "bne- cr7, " __rseq_str(label) "\n\t" | |
159 | ||
160 | #define RSEQ_ASM_OP_CMPNE(var, expectnot, label) \ | |
161 | LOAD_WORD "%%r17, %[" __rseq_str(var) "]\n\t" \ | |
162 | CMP_WORD "cr7, %%r17, %[" __rseq_str(expectnot) "]\n\t" \ | |
163 | "beq- cr7, " __rseq_str(label) "\n\t" | |
164 | ||
165 | #define RSEQ_ASM_OP_STORE(value, var) \ | |
166 | STORE_WORD "%[" __rseq_str(value) "], %[" __rseq_str(var) "]\n\t" | |
167 | ||
168 | /* Load @var to r17 */ | |
169 | #define RSEQ_ASM_OP_R_LOAD(var) \ | |
170 | LOAD_WORD "%%r17, %[" __rseq_str(var) "]\n\t" | |
171 | ||
172 | /* Store r17 to @var */ | |
173 | #define RSEQ_ASM_OP_R_STORE(var) \ | |
174 | STORE_WORD "%%r17, %[" __rseq_str(var) "]\n\t" | |
175 | ||
176 | /* Add @count to r17 */ | |
177 | #define RSEQ_ASM_OP_R_ADD(count) \ | |
178 | "add %%r17, %[" __rseq_str(count) "], %%r17\n\t" | |
179 | ||
180 | /* Load (r17 + voffp) to r17 */ | |
181 | #define RSEQ_ASM_OP_R_LOADX(voffp) \ | |
182 | LOADX_WORD "%%r17, %[" __rseq_str(voffp) "], %%r17\n\t" | |
183 | ||
184 | /* TODO: implement a faster memcpy. */ | |
185 | #define RSEQ_ASM_OP_R_MEMCPY() \ | |
186 | "cmpdi %%r19, 0\n\t" \ | |
187 | "beq 333f\n\t" \ | |
188 | "addi %%r20, %%r20, -1\n\t" \ | |
189 | "addi %%r21, %%r21, -1\n\t" \ | |
190 | "222:\n\t" \ | |
191 | "lbzu %%r18, 1(%%r20)\n\t" \ | |
192 | "stbu %%r18, 1(%%r21)\n\t" \ | |
193 | "addi %%r19, %%r19, -1\n\t" \ | |
194 | "cmpdi %%r19, 0\n\t" \ | |
195 | "bne 222b\n\t" \ | |
196 | "333:\n\t" \ | |
197 | ||
198 | #define RSEQ_ASM_OP_R_FINAL_STORE(var, post_commit_label) \ | |
199 | STORE_WORD "%%r17, %[" __rseq_str(var) "]\n\t" \ | |
200 | __rseq_str(post_commit_label) ":\n\t" | |
201 | ||
202 | #define RSEQ_ASM_OP_FINAL_STORE(value, var, post_commit_label) \ | |
203 | STORE_WORD "%[" __rseq_str(value) "], %[" __rseq_str(var) "]\n\t" \ | |
204 | __rseq_str(post_commit_label) ":\n\t" | |
205 | ||
206 | static inline __attribute__((always_inline)) | |
207 | int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu) | |
208 | { | |
209 | RSEQ_INJECT_C(9) | |
210 | ||
211 | __asm__ __volatile__ goto ( | |
212 | RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */ | |
90d9876e MD |
213 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail]) |
214 | #ifdef RSEQ_COMPARE_TWICE | |
215 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1]) | |
216 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2]) | |
217 | #endif | |
784b0012 MD |
218 | /* Start rseq by storing table entry pointer into rseq_cs. */ |
219 | RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs) | |
220 | /* cmp cpuid */ | |
221 | RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f) | |
222 | RSEQ_INJECT_ASM(3) | |
223 | /* cmp @v equal to @expect */ | |
224 | RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail]) | |
225 | RSEQ_INJECT_ASM(4) | |
226 | #ifdef RSEQ_COMPARE_TWICE | |
227 | /* cmp cpuid */ | |
228 | RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1]) | |
229 | /* cmp @v equal to @expect */ | |
230 | RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2]) | |
231 | #endif | |
232 | /* final store */ | |
233 | RSEQ_ASM_OP_FINAL_STORE(newv, v, 2) | |
234 | RSEQ_INJECT_ASM(5) | |
235 | RSEQ_ASM_DEFINE_ABORT(4, abort) | |
236 | : /* gcc asm goto does not allow outputs */ | |
237 | : [cpu_id] "r" (cpu), | |
238 | [current_cpu_id] "m" (__rseq_abi.cpu_id), | |
239 | [rseq_cs] "m" (__rseq_abi.rseq_cs), | |
240 | [v] "m" (*v), | |
241 | [expect] "r" (expect), | |
242 | [newv] "r" (newv) | |
243 | RSEQ_INJECT_INPUT | |
244 | : "memory", "cc", "r17" | |
245 | RSEQ_INJECT_CLOBBER | |
246 | : abort, cmpfail | |
247 | #ifdef RSEQ_COMPARE_TWICE | |
248 | , error1, error2 | |
249 | #endif | |
250 | ); | |
251 | return 0; | |
252 | abort: | |
253 | RSEQ_INJECT_FAILED | |
254 | return -1; | |
255 | cmpfail: | |
256 | return 1; | |
257 | #ifdef RSEQ_COMPARE_TWICE | |
258 | error1: | |
259 | rseq_bug("cpu_id comparison failed"); | |
260 | error2: | |
261 | rseq_bug("expected value comparison failed"); | |
262 | #endif | |
263 | } | |
264 | ||
265 | static inline __attribute__((always_inline)) | |
266 | int rseq_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot, | |
267 | off_t voffp, intptr_t *load, int cpu) | |
268 | { | |
269 | RSEQ_INJECT_C(9) | |
270 | ||
271 | __asm__ __volatile__ goto ( | |
272 | RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */ | |
90d9876e MD |
273 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail]) |
274 | #ifdef RSEQ_COMPARE_TWICE | |
275 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1]) | |
276 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2]) | |
277 | #endif | |
784b0012 MD |
278 | /* Start rseq by storing table entry pointer into rseq_cs. */ |
279 | RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs) | |
280 | /* cmp cpuid */ | |
281 | RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f) | |
282 | RSEQ_INJECT_ASM(3) | |
283 | /* cmp @v not equal to @expectnot */ | |
284 | RSEQ_ASM_OP_CMPNE(v, expectnot, %l[cmpfail]) | |
285 | RSEQ_INJECT_ASM(4) | |
286 | #ifdef RSEQ_COMPARE_TWICE | |
287 | /* cmp cpuid */ | |
288 | RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1]) | |
289 | /* cmp @v not equal to @expectnot */ | |
290 | RSEQ_ASM_OP_CMPNE(v, expectnot, %l[error2]) | |
291 | #endif | |
292 | /* load the value of @v */ | |
293 | RSEQ_ASM_OP_R_LOAD(v) | |
294 | /* store it in @load */ | |
295 | RSEQ_ASM_OP_R_STORE(load) | |
296 | /* dereference voffp(v) */ | |
297 | RSEQ_ASM_OP_R_LOADX(voffp) | |
298 | /* final store the value at voffp(v) */ | |
299 | RSEQ_ASM_OP_R_FINAL_STORE(v, 2) | |
300 | RSEQ_INJECT_ASM(5) | |
301 | RSEQ_ASM_DEFINE_ABORT(4, abort) | |
302 | : /* gcc asm goto does not allow outputs */ | |
303 | : [cpu_id] "r" (cpu), | |
304 | [current_cpu_id] "m" (__rseq_abi.cpu_id), | |
305 | [rseq_cs] "m" (__rseq_abi.rseq_cs), | |
306 | /* final store input */ | |
307 | [v] "m" (*v), | |
308 | [expectnot] "r" (expectnot), | |
309 | [voffp] "b" (voffp), | |
310 | [load] "m" (*load) | |
311 | RSEQ_INJECT_INPUT | |
312 | : "memory", "cc", "r17" | |
313 | RSEQ_INJECT_CLOBBER | |
314 | : abort, cmpfail | |
315 | #ifdef RSEQ_COMPARE_TWICE | |
316 | , error1, error2 | |
317 | #endif | |
318 | ); | |
319 | return 0; | |
320 | abort: | |
321 | RSEQ_INJECT_FAILED | |
322 | return -1; | |
323 | cmpfail: | |
324 | return 1; | |
325 | #ifdef RSEQ_COMPARE_TWICE | |
326 | error1: | |
327 | rseq_bug("cpu_id comparison failed"); | |
328 | error2: | |
329 | rseq_bug("expected value comparison failed"); | |
330 | #endif | |
331 | } | |
332 | ||
333 | static inline __attribute__((always_inline)) | |
334 | int rseq_addv(intptr_t *v, intptr_t count, int cpu) | |
335 | { | |
336 | RSEQ_INJECT_C(9) | |
337 | ||
338 | __asm__ __volatile__ goto ( | |
339 | RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */ | |
90d9876e MD |
340 | #ifdef RSEQ_COMPARE_TWICE |
341 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1]) | |
342 | #endif | |
784b0012 MD |
343 | /* Start rseq by storing table entry pointer into rseq_cs. */ |
344 | RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs) | |
345 | /* cmp cpuid */ | |
346 | RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f) | |
347 | RSEQ_INJECT_ASM(3) | |
348 | #ifdef RSEQ_COMPARE_TWICE | |
349 | /* cmp cpuid */ | |
350 | RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1]) | |
351 | #endif | |
352 | /* load the value of @v */ | |
353 | RSEQ_ASM_OP_R_LOAD(v) | |
354 | /* add @count to it */ | |
355 | RSEQ_ASM_OP_R_ADD(count) | |
356 | /* final store */ | |
357 | RSEQ_ASM_OP_R_FINAL_STORE(v, 2) | |
358 | RSEQ_INJECT_ASM(4) | |
359 | RSEQ_ASM_DEFINE_ABORT(4, abort) | |
360 | : /* gcc asm goto does not allow outputs */ | |
361 | : [cpu_id] "r" (cpu), | |
362 | [current_cpu_id] "m" (__rseq_abi.cpu_id), | |
363 | [rseq_cs] "m" (__rseq_abi.rseq_cs), | |
364 | /* final store input */ | |
365 | [v] "m" (*v), | |
366 | [count] "r" (count) | |
367 | RSEQ_INJECT_INPUT | |
368 | : "memory", "cc", "r17" | |
369 | RSEQ_INJECT_CLOBBER | |
370 | : abort | |
371 | #ifdef RSEQ_COMPARE_TWICE | |
372 | , error1 | |
373 | #endif | |
374 | ); | |
375 | return 0; | |
376 | abort: | |
377 | RSEQ_INJECT_FAILED | |
378 | return -1; | |
379 | #ifdef RSEQ_COMPARE_TWICE | |
380 | error1: | |
381 | rseq_bug("cpu_id comparison failed"); | |
382 | #endif | |
383 | } | |
384 | ||
385 | static inline __attribute__((always_inline)) | |
386 | int rseq_cmpeqv_trystorev_storev(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 ( | |
393 | RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */ | |
90d9876e MD |
394 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail]) |
395 | #ifdef RSEQ_COMPARE_TWICE | |
396 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1]) | |
397 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2]) | |
398 | #endif | |
784b0012 MD |
399 | /* Start rseq by storing table entry pointer into rseq_cs. */ |
400 | RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs) | |
401 | /* cmp cpuid */ | |
402 | RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f) | |
403 | RSEQ_INJECT_ASM(3) | |
404 | /* cmp @v equal to @expect */ | |
405 | RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail]) | |
406 | RSEQ_INJECT_ASM(4) | |
407 | #ifdef RSEQ_COMPARE_TWICE | |
408 | /* cmp cpuid */ | |
409 | RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1]) | |
410 | /* cmp @v equal to @expect */ | |
411 | RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2]) | |
412 | #endif | |
413 | /* try store */ | |
414 | RSEQ_ASM_OP_STORE(newv2, v2) | |
415 | RSEQ_INJECT_ASM(5) | |
416 | /* final store */ | |
417 | RSEQ_ASM_OP_FINAL_STORE(newv, v, 2) | |
418 | RSEQ_INJECT_ASM(6) | |
419 | RSEQ_ASM_DEFINE_ABORT(4, abort) | |
420 | : /* gcc asm goto does not allow outputs */ | |
421 | : [cpu_id] "r" (cpu), | |
422 | [current_cpu_id] "m" (__rseq_abi.cpu_id), | |
423 | [rseq_cs] "m" (__rseq_abi.rseq_cs), | |
424 | /* try store input */ | |
425 | [v2] "m" (*v2), | |
426 | [newv2] "r" (newv2), | |
427 | /* final store input */ | |
428 | [v] "m" (*v), | |
429 | [expect] "r" (expect), | |
430 | [newv] "r" (newv) | |
431 | RSEQ_INJECT_INPUT | |
432 | : "memory", "cc", "r17" | |
433 | RSEQ_INJECT_CLOBBER | |
434 | : abort, cmpfail | |
435 | #ifdef RSEQ_COMPARE_TWICE | |
436 | , error1, error2 | |
437 | #endif | |
438 | ); | |
439 | return 0; | |
440 | abort: | |
441 | RSEQ_INJECT_FAILED | |
442 | return -1; | |
443 | cmpfail: | |
444 | return 1; | |
445 | #ifdef RSEQ_COMPARE_TWICE | |
446 | error1: | |
447 | rseq_bug("cpu_id comparison failed"); | |
448 | error2: | |
449 | rseq_bug("expected value comparison failed"); | |
450 | #endif | |
451 | } | |
452 | ||
453 | static inline __attribute__((always_inline)) | |
454 | int rseq_cmpeqv_trystorev_storev_release(intptr_t *v, intptr_t expect, | |
455 | intptr_t *v2, intptr_t newv2, | |
456 | intptr_t newv, int cpu) | |
457 | { | |
458 | RSEQ_INJECT_C(9) | |
459 | ||
460 | __asm__ __volatile__ goto ( | |
461 | RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */ | |
90d9876e MD |
462 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail]) |
463 | #ifdef RSEQ_COMPARE_TWICE | |
464 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1]) | |
465 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2]) | |
466 | #endif | |
784b0012 MD |
467 | /* Start rseq by storing table entry pointer into rseq_cs. */ |
468 | RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs) | |
469 | /* cmp cpuid */ | |
470 | RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f) | |
471 | RSEQ_INJECT_ASM(3) | |
472 | /* cmp @v equal to @expect */ | |
473 | RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail]) | |
474 | RSEQ_INJECT_ASM(4) | |
475 | #ifdef RSEQ_COMPARE_TWICE | |
476 | /* cmp cpuid */ | |
477 | RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1]) | |
478 | /* cmp @v equal to @expect */ | |
479 | RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2]) | |
480 | #endif | |
481 | /* try store */ | |
482 | RSEQ_ASM_OP_STORE(newv2, v2) | |
483 | RSEQ_INJECT_ASM(5) | |
484 | /* for 'release' */ | |
485 | "lwsync\n\t" | |
486 | /* final store */ | |
487 | RSEQ_ASM_OP_FINAL_STORE(newv, v, 2) | |
488 | RSEQ_INJECT_ASM(6) | |
489 | RSEQ_ASM_DEFINE_ABORT(4, abort) | |
490 | : /* gcc asm goto does not allow outputs */ | |
491 | : [cpu_id] "r" (cpu), | |
492 | [current_cpu_id] "m" (__rseq_abi.cpu_id), | |
493 | [rseq_cs] "m" (__rseq_abi.rseq_cs), | |
494 | /* try store input */ | |
495 | [v2] "m" (*v2), | |
496 | [newv2] "r" (newv2), | |
497 | /* final store input */ | |
498 | [v] "m" (*v), | |
499 | [expect] "r" (expect), | |
500 | [newv] "r" (newv) | |
501 | RSEQ_INJECT_INPUT | |
502 | : "memory", "cc", "r17" | |
503 | RSEQ_INJECT_CLOBBER | |
504 | : abort, cmpfail | |
505 | #ifdef RSEQ_COMPARE_TWICE | |
506 | , error1, error2 | |
507 | #endif | |
508 | ); | |
509 | return 0; | |
510 | abort: | |
511 | RSEQ_INJECT_FAILED | |
512 | return -1; | |
513 | cmpfail: | |
514 | return 1; | |
515 | #ifdef RSEQ_COMPARE_TWICE | |
516 | error1: | |
517 | rseq_bug("cpu_id comparison failed"); | |
518 | error2: | |
519 | rseq_bug("expected value comparison failed"); | |
520 | #endif | |
521 | } | |
522 | ||
523 | static inline __attribute__((always_inline)) | |
524 | int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect, | |
525 | intptr_t *v2, intptr_t expect2, | |
526 | intptr_t newv, int cpu) | |
527 | { | |
528 | RSEQ_INJECT_C(9) | |
529 | ||
530 | __asm__ __volatile__ goto ( | |
531 | RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */ | |
90d9876e MD |
532 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail]) |
533 | #ifdef RSEQ_COMPARE_TWICE | |
534 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1]) | |
535 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2]) | |
536 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error3]) | |
537 | #endif | |
784b0012 MD |
538 | /* Start rseq by storing table entry pointer into rseq_cs. */ |
539 | RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs) | |
540 | /* cmp cpuid */ | |
541 | RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f) | |
542 | RSEQ_INJECT_ASM(3) | |
543 | /* cmp @v equal to @expect */ | |
544 | RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail]) | |
545 | RSEQ_INJECT_ASM(4) | |
546 | /* cmp @v2 equal to @expct2 */ | |
547 | RSEQ_ASM_OP_CMPEQ(v2, expect2, %l[cmpfail]) | |
548 | RSEQ_INJECT_ASM(5) | |
549 | #ifdef RSEQ_COMPARE_TWICE | |
550 | /* cmp cpuid */ | |
551 | RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1]) | |
552 | /* cmp @v equal to @expect */ | |
553 | RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2]) | |
554 | /* cmp @v2 equal to @expct2 */ | |
555 | RSEQ_ASM_OP_CMPEQ(v2, expect2, %l[error3]) | |
556 | #endif | |
557 | /* final store */ | |
558 | RSEQ_ASM_OP_FINAL_STORE(newv, v, 2) | |
559 | RSEQ_INJECT_ASM(6) | |
560 | RSEQ_ASM_DEFINE_ABORT(4, abort) | |
561 | : /* gcc asm goto does not allow outputs */ | |
562 | : [cpu_id] "r" (cpu), | |
563 | [current_cpu_id] "m" (__rseq_abi.cpu_id), | |
564 | [rseq_cs] "m" (__rseq_abi.rseq_cs), | |
565 | /* cmp2 input */ | |
566 | [v2] "m" (*v2), | |
567 | [expect2] "r" (expect2), | |
568 | /* final store input */ | |
569 | [v] "m" (*v), | |
570 | [expect] "r" (expect), | |
571 | [newv] "r" (newv) | |
572 | RSEQ_INJECT_INPUT | |
573 | : "memory", "cc", "r17" | |
574 | RSEQ_INJECT_CLOBBER | |
575 | : abort, cmpfail | |
576 | #ifdef RSEQ_COMPARE_TWICE | |
577 | , error1, error2, error3 | |
578 | #endif | |
579 | ); | |
580 | return 0; | |
581 | abort: | |
582 | RSEQ_INJECT_FAILED | |
583 | return -1; | |
584 | cmpfail: | |
585 | return 1; | |
586 | #ifdef RSEQ_COMPARE_TWICE | |
587 | error1: | |
588 | rseq_bug("cpu_id comparison failed"); | |
589 | error2: | |
590 | rseq_bug("1st expected value comparison failed"); | |
591 | error3: | |
592 | rseq_bug("2nd expected value comparison failed"); | |
593 | #endif | |
594 | } | |
595 | ||
596 | static inline __attribute__((always_inline)) | |
597 | int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect, | |
598 | void *dst, void *src, size_t len, | |
599 | intptr_t newv, int cpu) | |
600 | { | |
601 | RSEQ_INJECT_C(9) | |
602 | ||
603 | __asm__ __volatile__ goto ( | |
604 | RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */ | |
90d9876e MD |
605 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail]) |
606 | #ifdef RSEQ_COMPARE_TWICE | |
607 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1]) | |
608 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2]) | |
609 | #endif | |
784b0012 MD |
610 | /* setup for mempcy */ |
611 | "mr %%r19, %[len]\n\t" | |
612 | "mr %%r20, %[src]\n\t" | |
613 | "mr %%r21, %[dst]\n\t" | |
614 | /* Start rseq by storing table entry pointer into rseq_cs. */ | |
615 | RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs) | |
616 | /* cmp cpuid */ | |
617 | RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f) | |
618 | RSEQ_INJECT_ASM(3) | |
619 | /* cmp @v equal to @expect */ | |
620 | RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail]) | |
621 | RSEQ_INJECT_ASM(4) | |
622 | #ifdef RSEQ_COMPARE_TWICE | |
623 | /* cmp cpuid */ | |
624 | RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1]) | |
625 | /* cmp @v equal to @expect */ | |
626 | RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2]) | |
627 | #endif | |
628 | /* try memcpy */ | |
629 | RSEQ_ASM_OP_R_MEMCPY() | |
630 | RSEQ_INJECT_ASM(5) | |
631 | /* final store */ | |
632 | RSEQ_ASM_OP_FINAL_STORE(newv, v, 2) | |
633 | RSEQ_INJECT_ASM(6) | |
634 | /* teardown */ | |
635 | RSEQ_ASM_DEFINE_ABORT(4, abort) | |
636 | : /* gcc asm goto does not allow outputs */ | |
637 | : [cpu_id] "r" (cpu), | |
638 | [current_cpu_id] "m" (__rseq_abi.cpu_id), | |
639 | [rseq_cs] "m" (__rseq_abi.rseq_cs), | |
640 | /* final store input */ | |
641 | [v] "m" (*v), | |
642 | [expect] "r" (expect), | |
643 | [newv] "r" (newv), | |
644 | /* try memcpy input */ | |
645 | [dst] "r" (dst), | |
646 | [src] "r" (src), | |
647 | [len] "r" (len) | |
648 | RSEQ_INJECT_INPUT | |
649 | : "memory", "cc", "r17", "r18", "r19", "r20", "r21" | |
650 | RSEQ_INJECT_CLOBBER | |
651 | : abort, cmpfail | |
652 | #ifdef RSEQ_COMPARE_TWICE | |
653 | , error1, error2 | |
654 | #endif | |
655 | ); | |
656 | return 0; | |
657 | abort: | |
658 | RSEQ_INJECT_FAILED | |
659 | return -1; | |
660 | cmpfail: | |
661 | return 1; | |
662 | #ifdef RSEQ_COMPARE_TWICE | |
663 | error1: | |
664 | rseq_bug("cpu_id comparison failed"); | |
665 | error2: | |
666 | rseq_bug("expected value comparison failed"); | |
667 | #endif | |
668 | } | |
669 | ||
670 | static inline __attribute__((always_inline)) | |
671 | int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect, | |
672 | void *dst, void *src, size_t len, | |
673 | intptr_t newv, int cpu) | |
674 | { | |
675 | RSEQ_INJECT_C(9) | |
676 | ||
677 | __asm__ __volatile__ goto ( | |
678 | RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */ | |
90d9876e MD |
679 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail]) |
680 | #ifdef RSEQ_COMPARE_TWICE | |
681 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1]) | |
682 | RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2]) | |
683 | #endif | |
784b0012 MD |
684 | /* setup for mempcy */ |
685 | "mr %%r19, %[len]\n\t" | |
686 | "mr %%r20, %[src]\n\t" | |
687 | "mr %%r21, %[dst]\n\t" | |
688 | /* Start rseq by storing table entry pointer into rseq_cs. */ | |
689 | RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs) | |
690 | /* cmp cpuid */ | |
691 | RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f) | |
692 | RSEQ_INJECT_ASM(3) | |
693 | /* cmp @v equal to @expect */ | |
694 | RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail]) | |
695 | RSEQ_INJECT_ASM(4) | |
696 | #ifdef RSEQ_COMPARE_TWICE | |
697 | /* cmp cpuid */ | |
698 | RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1]) | |
699 | /* cmp @v equal to @expect */ | |
700 | RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2]) | |
701 | #endif | |
702 | /* try memcpy */ | |
703 | RSEQ_ASM_OP_R_MEMCPY() | |
704 | RSEQ_INJECT_ASM(5) | |
705 | /* for 'release' */ | |
706 | "lwsync\n\t" | |
707 | /* final store */ | |
708 | RSEQ_ASM_OP_FINAL_STORE(newv, v, 2) | |
709 | RSEQ_INJECT_ASM(6) | |
710 | /* teardown */ | |
711 | RSEQ_ASM_DEFINE_ABORT(4, abort) | |
712 | : /* gcc asm goto does not allow outputs */ | |
713 | : [cpu_id] "r" (cpu), | |
714 | [current_cpu_id] "m" (__rseq_abi.cpu_id), | |
715 | [rseq_cs] "m" (__rseq_abi.rseq_cs), | |
716 | /* final store input */ | |
717 | [v] "m" (*v), | |
718 | [expect] "r" (expect), | |
719 | [newv] "r" (newv), | |
720 | /* try memcpy input */ | |
721 | [dst] "r" (dst), | |
722 | [src] "r" (src), | |
723 | [len] "r" (len) | |
724 | RSEQ_INJECT_INPUT | |
725 | : "memory", "cc", "r17", "r18", "r19", "r20", "r21" | |
726 | RSEQ_INJECT_CLOBBER | |
727 | : abort, cmpfail | |
728 | #ifdef RSEQ_COMPARE_TWICE | |
729 | , error1, error2 | |
730 | #endif | |
731 | ); | |
732 | return 0; | |
733 | abort: | |
734 | RSEQ_INJECT_FAILED | |
735 | return -1; | |
736 | cmpfail: | |
737 | return 1; | |
738 | #ifdef RSEQ_COMPARE_TWICE | |
739 | error1: | |
740 | rseq_bug("cpu_id comparison failed"); | |
741 | error2: | |
742 | rseq_bug("expected value comparison failed"); | |
743 | #endif | |
744 | } | |
745 | ||
de28c254 MD |
746 | /* TODO. */ |
747 | static inline __attribute__((always_inline)) | |
748 | int rseq_deref_loadoffp(void *p, off_t voffp, intptr_t *load, int cpu) | |
749 | { | |
750 | return -1; | |
751 | } | |
752 | ||
784b0012 MD |
753 | #undef STORE_WORD |
754 | #undef LOAD_WORD | |
755 | #undef LOADX_WORD | |
756 | #undef CMP_WORD | |
757 | ||
758 | #endif /* !RSEQ_SKIP_FASTPATH */ |