Commit | Line | Data |
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3ac4dbe3 AN |
1 | /* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */ |
2 | #ifndef __BPF_TRACING_H__ | |
3 | #define __BPF_TRACING_H__ | |
4 | ||
6f5d467d AN |
5 | #include <bpf/bpf_helpers.h> |
6 | ||
3ac4dbe3 AN |
7 | /* Scan the ARCH passed in from ARCH env variable (see Makefile) */ |
8 | #if defined(__TARGET_ARCH_x86) | |
9 | #define bpf_target_x86 | |
10 | #define bpf_target_defined | |
11 | #elif defined(__TARGET_ARCH_s390) | |
12 | #define bpf_target_s390 | |
13 | #define bpf_target_defined | |
14 | #elif defined(__TARGET_ARCH_arm) | |
15 | #define bpf_target_arm | |
16 | #define bpf_target_defined | |
17 | #elif defined(__TARGET_ARCH_arm64) | |
18 | #define bpf_target_arm64 | |
19 | #define bpf_target_defined | |
20 | #elif defined(__TARGET_ARCH_mips) | |
21 | #define bpf_target_mips | |
22 | #define bpf_target_defined | |
23 | #elif defined(__TARGET_ARCH_powerpc) | |
24 | #define bpf_target_powerpc | |
25 | #define bpf_target_defined | |
26 | #elif defined(__TARGET_ARCH_sparc) | |
27 | #define bpf_target_sparc | |
28 | #define bpf_target_defined | |
589fed47 BT |
29 | #elif defined(__TARGET_ARCH_riscv) |
30 | #define bpf_target_riscv | |
31 | #define bpf_target_defined | |
07385998 VI |
32 | #elif defined(__TARGET_ARCH_arc) |
33 | #define bpf_target_arc | |
34 | #define bpf_target_defined | |
00883922 HC |
35 | #elif defined(__TARGET_ARCH_loongarch) |
36 | #define bpf_target_loongarch | |
37 | #define bpf_target_defined | |
3ac4dbe3 | 38 | #else |
3ac4dbe3 AN |
39 | |
40 | /* Fall back to what the compiler says */ | |
3ac4dbe3 AN |
41 | #if defined(__x86_64__) |
42 | #define bpf_target_x86 | |
4a638d58 | 43 | #define bpf_target_defined |
3ac4dbe3 AN |
44 | #elif defined(__s390__) |
45 | #define bpf_target_s390 | |
4a638d58 | 46 | #define bpf_target_defined |
3ac4dbe3 AN |
47 | #elif defined(__arm__) |
48 | #define bpf_target_arm | |
4a638d58 | 49 | #define bpf_target_defined |
3ac4dbe3 AN |
50 | #elif defined(__aarch64__) |
51 | #define bpf_target_arm64 | |
4a638d58 | 52 | #define bpf_target_defined |
3ac4dbe3 AN |
53 | #elif defined(__mips__) |
54 | #define bpf_target_mips | |
4a638d58 | 55 | #define bpf_target_defined |
3ac4dbe3 AN |
56 | #elif defined(__powerpc__) |
57 | #define bpf_target_powerpc | |
4a638d58 | 58 | #define bpf_target_defined |
3ac4dbe3 AN |
59 | #elif defined(__sparc__) |
60 | #define bpf_target_sparc | |
4a638d58 | 61 | #define bpf_target_defined |
589fed47 BT |
62 | #elif defined(__riscv) && __riscv_xlen == 64 |
63 | #define bpf_target_riscv | |
64 | #define bpf_target_defined | |
07385998 VI |
65 | #elif defined(__arc__) |
66 | #define bpf_target_arc | |
67 | #define bpf_target_defined | |
00883922 HC |
68 | #elif defined(__loongarch__) |
69 | #define bpf_target_loongarch | |
70 | #define bpf_target_defined | |
4a638d58 LB |
71 | #endif /* no compiler target */ |
72 | ||
3ac4dbe3 | 73 | #endif |
4a638d58 LB |
74 | |
75 | #ifndef __BPF_TARGET_MISSING | |
76 | #define __BPF_TARGET_MISSING "GCC error \"Must specify a BPF target arch via __TARGET_ARCH_xxx\"" | |
3ac4dbe3 AN |
77 | #endif |
78 | ||
79 | #if defined(bpf_target_x86) | |
80 | ||
01329032 AN |
81 | /* |
82 | * https://en.wikipedia.org/wiki/X86_calling_conventions#System_V_AMD64_ABI | |
83 | */ | |
84 | ||
fd56e005 | 85 | #if defined(__KERNEL__) || defined(__VMLINUX_H__) |
b8ebce86 | 86 | |
3cc31d79 AN |
87 | #define __PT_PARM1_REG di |
88 | #define __PT_PARM2_REG si | |
89 | #define __PT_PARM3_REG dx | |
90 | #define __PT_PARM4_REG cx | |
91 | #define __PT_PARM5_REG r8 | |
01329032 | 92 | #define __PT_PARM6_REG r9 |
d21fbcee AN |
93 | /* |
94 | * Syscall uses r10 for PARM4. See arch/x86/entry/entry_64.S:entry_SYSCALL_64 | |
95 | * comments in Linux sources. And refer to syscall(2) manpage. | |
96 | */ | |
97 | #define __PT_PARM1_SYSCALL_REG __PT_PARM1_REG | |
98 | #define __PT_PARM2_SYSCALL_REG __PT_PARM2_REG | |
99 | #define __PT_PARM3_SYSCALL_REG __PT_PARM3_REG | |
100 | #define __PT_PARM4_SYSCALL_REG r10 | |
101 | #define __PT_PARM5_SYSCALL_REG __PT_PARM5_REG | |
102 | #define __PT_PARM6_SYSCALL_REG __PT_PARM6_REG | |
103 | ||
3cc31d79 AN |
104 | #define __PT_RET_REG sp |
105 | #define __PT_FP_REG bp | |
106 | #define __PT_RC_REG ax | |
107 | #define __PT_SP_REG sp | |
108 | #define __PT_IP_REG ip | |
b8ebce86 | 109 | |
3ac4dbe3 | 110 | #else |
b8ebce86 | 111 | |
3ac4dbe3 | 112 | #ifdef __i386__ |
b8ebce86 | 113 | |
3c59623d | 114 | /* i386 kernel is built with -mregparm=3 */ |
3cc31d79 AN |
115 | #define __PT_PARM1_REG eax |
116 | #define __PT_PARM2_REG edx | |
117 | #define __PT_PARM3_REG ecx | |
ff00f9cb AN |
118 | /* i386 syscall ABI is very different, refer to syscall(2) manpage */ |
119 | #define __PT_PARM1_SYSCALL_REG ebx | |
120 | #define __PT_PARM2_SYSCALL_REG ecx | |
121 | #define __PT_PARM3_SYSCALL_REG edx | |
122 | #define __PT_PARM4_SYSCALL_REG esi | |
123 | #define __PT_PARM5_SYSCALL_REG edi | |
124 | #define __PT_PARM6_SYSCALL_REG ebp | |
125 | ||
3cc31d79 AN |
126 | #define __PT_RET_REG esp |
127 | #define __PT_FP_REG ebp | |
128 | #define __PT_RC_REG eax | |
129 | #define __PT_SP_REG esp | |
130 | #define __PT_IP_REG eip | |
131 | ||
132 | #else /* __i386__ */ | |
133 | ||
134 | #define __PT_PARM1_REG rdi | |
135 | #define __PT_PARM2_REG rsi | |
136 | #define __PT_PARM3_REG rdx | |
137 | #define __PT_PARM4_REG rcx | |
138 | #define __PT_PARM5_REG r8 | |
01329032 | 139 | #define __PT_PARM6_REG r9 |
d21fbcee AN |
140 | |
141 | #define __PT_PARM1_SYSCALL_REG __PT_PARM1_REG | |
142 | #define __PT_PARM2_SYSCALL_REG __PT_PARM2_REG | |
143 | #define __PT_PARM3_SYSCALL_REG __PT_PARM3_REG | |
144 | #define __PT_PARM4_SYSCALL_REG r10 | |
145 | #define __PT_PARM5_SYSCALL_REG __PT_PARM5_REG | |
146 | #define __PT_PARM6_SYSCALL_REG __PT_PARM6_REG | |
147 | ||
3cc31d79 AN |
148 | #define __PT_RET_REG rsp |
149 | #define __PT_FP_REG rbp | |
150 | #define __PT_RC_REG rax | |
151 | #define __PT_SP_REG rsp | |
152 | #define __PT_IP_REG rip | |
153 | ||
154 | #endif /* __i386__ */ | |
155 | ||
156 | #endif /* __KERNEL__ || __VMLINUX_H__ */ | |
3ac4dbe3 AN |
157 | |
158 | #elif defined(bpf_target_s390) | |
159 | ||
e82b96a3 AN |
160 | /* |
161 | * https://github.com/IBM/s390x-abi/releases/download/v1.6/lzsabi_s390x.pdf | |
162 | */ | |
163 | ||
1f22a6f9 IL |
164 | struct pt_regs___s390 { |
165 | unsigned long orig_gpr2; | |
166 | }; | |
167 | ||
3ac4dbe3 | 168 | /* s390 provides user_pt_regs instead of struct pt_regs to userspace */ |
3cc31d79 AN |
169 | #define __PT_REGS_CAST(x) ((const user_pt_regs *)(x)) |
170 | #define __PT_PARM1_REG gprs[2] | |
171 | #define __PT_PARM2_REG gprs[3] | |
172 | #define __PT_PARM3_REG gprs[4] | |
173 | #define __PT_PARM4_REG gprs[5] | |
174 | #define __PT_PARM5_REG gprs[6] | |
e82b96a3 AN |
175 | |
176 | #define __PT_PARM1_SYSCALL_REG orig_gpr2 | |
177 | #define __PT_PARM2_SYSCALL_REG __PT_PARM2_REG | |
178 | #define __PT_PARM3_SYSCALL_REG __PT_PARM3_REG | |
179 | #define __PT_PARM4_SYSCALL_REG __PT_PARM4_REG | |
180 | #define __PT_PARM5_SYSCALL_REG __PT_PARM5_REG | |
181 | #define __PT_PARM6_SYSCALL_REG gprs[7] | |
182 | #define PT_REGS_PARM1_SYSCALL(x) PT_REGS_PARM1_CORE_SYSCALL(x) | |
183 | #define PT_REGS_PARM1_CORE_SYSCALL(x) \ | |
184 | BPF_CORE_READ((const struct pt_regs___s390 *)(x), __PT_PARM1_SYSCALL_REG) | |
185 | ||
7244eb66 | 186 | #define __PT_RET_REG gprs[14] |
3cc31d79 AN |
187 | #define __PT_FP_REG gprs[11] /* Works only with CONFIG_FRAME_POINTER */ |
188 | #define __PT_RC_REG gprs[2] | |
189 | #define __PT_SP_REG gprs[15] | |
190 | #define __PT_IP_REG psw.addr | |
b8ebce86 | 191 | |
3ac4dbe3 AN |
192 | #elif defined(bpf_target_arm) |
193 | ||
1dac40ac AN |
194 | /* |
195 | * https://github.com/ARM-software/abi-aa/blob/main/aapcs32/aapcs32.rst#machine-registers | |
196 | */ | |
197 | ||
3cc31d79 AN |
198 | #define __PT_PARM1_REG uregs[0] |
199 | #define __PT_PARM2_REG uregs[1] | |
200 | #define __PT_PARM3_REG uregs[2] | |
201 | #define __PT_PARM4_REG uregs[3] | |
3cc31d79 AN |
202 | #define __PT_RET_REG uregs[14] |
203 | #define __PT_FP_REG uregs[11] /* Works only with CONFIG_FRAME_POINTER */ | |
204 | #define __PT_RC_REG uregs[0] | |
205 | #define __PT_SP_REG uregs[13] | |
206 | #define __PT_IP_REG uregs[12] | |
b8ebce86 | 207 | |
3ac4dbe3 AN |
208 | #elif defined(bpf_target_arm64) |
209 | ||
1dac40ac AN |
210 | /* |
211 | * https://github.com/ARM-software/abi-aa/blob/main/aapcs64/aapcs64.rst#machine-registers | |
212 | */ | |
213 | ||
fbca4a2f IL |
214 | struct pt_regs___arm64 { |
215 | unsigned long orig_x0; | |
216 | }; | |
217 | ||
3ac4dbe3 | 218 | /* arm64 provides struct user_pt_regs instead of struct pt_regs to userspace */ |
3cc31d79 AN |
219 | #define __PT_REGS_CAST(x) ((const struct user_pt_regs *)(x)) |
220 | #define __PT_PARM1_REG regs[0] | |
221 | #define __PT_PARM2_REG regs[1] | |
222 | #define __PT_PARM3_REG regs[2] | |
223 | #define __PT_PARM4_REG regs[3] | |
224 | #define __PT_PARM5_REG regs[4] | |
1dac40ac AN |
225 | #define __PT_PARM6_REG regs[5] |
226 | #define __PT_PARM7_REG regs[6] | |
227 | #define __PT_PARM8_REG regs[7] | |
3cc31d79 AN |
228 | #define __PT_RET_REG regs[30] |
229 | #define __PT_FP_REG regs[29] /* Works only with CONFIG_FRAME_POINTER */ | |
230 | #define __PT_RC_REG regs[0] | |
231 | #define __PT_SP_REG sp | |
232 | #define __PT_IP_REG pc | |
6f5d467d | 233 | #define PT_REGS_PARM1_SYSCALL(x) PT_REGS_PARM1_CORE_SYSCALL(x) |
fbca4a2f | 234 | #define PT_REGS_PARM1_CORE_SYSCALL(x) BPF_CORE_READ((const struct pt_regs___arm64 *)(x), orig_x0) |
b8ebce86 | 235 | |
3ac4dbe3 AN |
236 | #elif defined(bpf_target_mips) |
237 | ||
1222445a AN |
238 | /* |
239 | * N64 ABI is assumed right now. | |
240 | * https://en.wikipedia.org/wiki/MIPS_architecture#Calling_conventions | |
241 | */ | |
242 | ||
3cc31d79 AN |
243 | #define __PT_PARM1_REG regs[4] |
244 | #define __PT_PARM2_REG regs[5] | |
245 | #define __PT_PARM3_REG regs[6] | |
246 | #define __PT_PARM4_REG regs[7] | |
247 | #define __PT_PARM5_REG regs[8] | |
1222445a AN |
248 | #define __PT_PARM6_REG regs[9] |
249 | #define __PT_PARM7_REG regs[10] | |
250 | #define __PT_PARM8_REG regs[11] | |
3cc31d79 AN |
251 | #define __PT_RET_REG regs[31] |
252 | #define __PT_FP_REG regs[30] /* Works only with CONFIG_FRAME_POINTER */ | |
253 | #define __PT_RC_REG regs[2] | |
254 | #define __PT_SP_REG regs[29] | |
255 | #define __PT_IP_REG cp0_epc | |
b8ebce86 | 256 | |
3ac4dbe3 AN |
257 | #elif defined(bpf_target_powerpc) |
258 | ||
2eb2be30 AN |
259 | /* |
260 | * http://refspecs.linux-foundation.org/elf/elfspec_ppc.pdf (page 3-14, | |
261 | * section "Function Calling Sequence") | |
262 | */ | |
263 | ||
3cc31d79 AN |
264 | #define __PT_PARM1_REG gpr[3] |
265 | #define __PT_PARM2_REG gpr[4] | |
266 | #define __PT_PARM3_REG gpr[5] | |
267 | #define __PT_PARM4_REG gpr[6] | |
268 | #define __PT_PARM5_REG gpr[7] | |
2eb2be30 AN |
269 | #define __PT_PARM6_REG gpr[8] |
270 | #define __PT_PARM7_REG gpr[9] | |
271 | #define __PT_PARM8_REG gpr[10] | |
3cc31d79 AN |
272 | #define __PT_RET_REG regs[31] |
273 | #define __PT_FP_REG __unsupported__ | |
274 | #define __PT_RC_REG gpr[3] | |
275 | #define __PT_SP_REG sp | |
276 | #define __PT_IP_REG nip | |
f07f1503 IL |
277 | /* powerpc does not select ARCH_HAS_SYSCALL_WRAPPER. */ |
278 | #define PT_REGS_SYSCALL_REGS(ctx) ctx | |
b8ebce86 | 279 | |
3ac4dbe3 AN |
280 | #elif defined(bpf_target_sparc) |
281 | ||
7f60f5d8 AN |
282 | /* |
283 | * https://en.wikipedia.org/wiki/Calling_convention#SPARC | |
284 | */ | |
285 | ||
3cc31d79 AN |
286 | #define __PT_PARM1_REG u_regs[UREG_I0] |
287 | #define __PT_PARM2_REG u_regs[UREG_I1] | |
288 | #define __PT_PARM3_REG u_regs[UREG_I2] | |
289 | #define __PT_PARM4_REG u_regs[UREG_I3] | |
290 | #define __PT_PARM5_REG u_regs[UREG_I4] | |
7f60f5d8 | 291 | #define __PT_PARM6_REG u_regs[UREG_I5] |
3cc31d79 AN |
292 | #define __PT_RET_REG u_regs[UREG_I7] |
293 | #define __PT_FP_REG __unsupported__ | |
294 | #define __PT_RC_REG u_regs[UREG_I0] | |
295 | #define __PT_SP_REG u_regs[UREG_FP] | |
3ac4dbe3 AN |
296 | /* Should this also be a bpf_target check for the sparc case? */ |
297 | #if defined(__arch64__) | |
3cc31d79 | 298 | #define __PT_IP_REG tpc |
3ac4dbe3 | 299 | #else |
3cc31d79 | 300 | #define __PT_IP_REG pc |
3ac4dbe3 AN |
301 | #endif |
302 | ||
589fed47 BT |
303 | #elif defined(bpf_target_riscv) |
304 | ||
b13ed8ca AN |
305 | /* |
306 | * https://github.com/riscv-non-isa/riscv-elf-psabi-doc/blob/master/riscv-cc.adoc#risc-v-calling-conventions | |
307 | */ | |
308 | ||
3cc31d79 AN |
309 | #define __PT_REGS_CAST(x) ((const struct user_regs_struct *)(x)) |
310 | #define __PT_PARM1_REG a0 | |
311 | #define __PT_PARM2_REG a1 | |
312 | #define __PT_PARM3_REG a2 | |
313 | #define __PT_PARM4_REG a3 | |
314 | #define __PT_PARM5_REG a4 | |
b13ed8ca AN |
315 | #define __PT_PARM6_REG a5 |
316 | #define __PT_PARM7_REG a6 | |
317 | #define __PT_PARM8_REG a7 | |
3cc31d79 | 318 | #define __PT_RET_REG ra |
5c101153 | 319 | #define __PT_FP_REG s0 |
935dc35c | 320 | #define __PT_RC_REG a0 |
3cc31d79 | 321 | #define __PT_SP_REG sp |
5c101153 | 322 | #define __PT_IP_REG pc |
cf0b5b27 IL |
323 | /* riscv does not select ARCH_HAS_SYSCALL_WRAPPER. */ |
324 | #define PT_REGS_SYSCALL_REGS(ctx) ctx | |
3cc31d79 | 325 | |
07385998 VI |
326 | #elif defined(bpf_target_arc) |
327 | ||
0ac08656 AN |
328 | /* |
329 | * Section "Function Calling Sequence" (page 24): | |
330 | * https://raw.githubusercontent.com/wiki/foss-for-synopsys-dwc-arc-processors/toolchain/files/ARCv2_ABI.pdf | |
331 | */ | |
332 | ||
07385998 VI |
333 | /* arc provides struct user_pt_regs instead of struct pt_regs to userspace */ |
334 | #define __PT_REGS_CAST(x) ((const struct user_regs_struct *)(x)) | |
335 | #define __PT_PARM1_REG scratch.r0 | |
336 | #define __PT_PARM2_REG scratch.r1 | |
337 | #define __PT_PARM3_REG scratch.r2 | |
338 | #define __PT_PARM4_REG scratch.r3 | |
339 | #define __PT_PARM5_REG scratch.r4 | |
0ac08656 AN |
340 | #define __PT_PARM6_REG scratch.r5 |
341 | #define __PT_PARM7_REG scratch.r6 | |
342 | #define __PT_PARM8_REG scratch.r7 | |
07385998 | 343 | #define __PT_RET_REG scratch.blink |
0ac08656 | 344 | #define __PT_FP_REG scratch.fp |
07385998 VI |
345 | #define __PT_RC_REG scratch.r0 |
346 | #define __PT_SP_REG scratch.sp | |
347 | #define __PT_IP_REG scratch.ret | |
348 | /* arc does not select ARCH_HAS_SYSCALL_WRAPPER. */ | |
349 | #define PT_REGS_SYSCALL_REGS(ctx) ctx | |
350 | ||
00883922 HC |
351 | #elif defined(bpf_target_loongarch) |
352 | ||
55ff00d5 AN |
353 | /* |
354 | * https://docs.kernel.org/loongarch/introduction.html | |
355 | * https://loongson.github.io/LoongArch-Documentation/LoongArch-ELF-ABI-EN.html | |
356 | */ | |
00883922 HC |
357 | |
358 | #define __PT_PARM1_REG regs[4] | |
359 | #define __PT_PARM2_REG regs[5] | |
360 | #define __PT_PARM3_REG regs[6] | |
361 | #define __PT_PARM4_REG regs[7] | |
362 | #define __PT_PARM5_REG regs[8] | |
55ff00d5 AN |
363 | #define __PT_PARM6_REG regs[9] |
364 | #define __PT_PARM7_REG regs[10] | |
365 | #define __PT_PARM8_REG regs[11] | |
00883922 HC |
366 | #define __PT_RET_REG regs[1] |
367 | #define __PT_FP_REG regs[22] | |
368 | #define __PT_RC_REG regs[4] | |
369 | #define __PT_SP_REG regs[3] | |
370 | #define __PT_IP_REG csr_era | |
371 | /* loongarch does not select ARCH_HAS_SYSCALL_WRAPPER. */ | |
372 | #define PT_REGS_SYSCALL_REGS(ctx) ctx | |
373 | ||
3cc31d79 AN |
374 | #endif |
375 | ||
376 | #if defined(bpf_target_defined) | |
377 | ||
589fed47 | 378 | struct pt_regs; |
589fed47 | 379 | |
3c59623d | 380 | /* allow some architectures to override `struct pt_regs` */ |
3cc31d79 AN |
381 | #ifndef __PT_REGS_CAST |
382 | #define __PT_REGS_CAST(x) (x) | |
3ac4dbe3 AN |
383 | #endif |
384 | ||
3c59623d AN |
385 | /* |
386 | * Different architectures support different number of arguments passed | |
387 | * through registers. i386 supports just 3, some arches support up to 8. | |
388 | */ | |
389 | #ifndef __PT_PARM4_REG | |
390 | #define __PT_PARM4_REG __unsupported__ | |
391 | #endif | |
392 | #ifndef __PT_PARM5_REG | |
393 | #define __PT_PARM5_REG __unsupported__ | |
394 | #endif | |
395 | #ifndef __PT_PARM6_REG | |
396 | #define __PT_PARM6_REG __unsupported__ | |
397 | #endif | |
398 | #ifndef __PT_PARM7_REG | |
399 | #define __PT_PARM7_REG __unsupported__ | |
400 | #endif | |
401 | #ifndef __PT_PARM8_REG | |
402 | #define __PT_PARM8_REG __unsupported__ | |
403 | #endif | |
8ccabeef AN |
404 | /* |
405 | * Similarly, syscall-specific conventions might differ between function call | |
406 | * conventions within each architecutre. All supported architectures pass | |
407 | * either 6 or 7 syscall arguments in registers. | |
408 | * | |
409 | * See syscall(2) manpage for succinct table with information on each arch. | |
410 | */ | |
411 | #ifndef __PT_PARM1_SYSCALL_REG | |
412 | #define __PT_PARM1_SYSCALL_REG __PT_PARM1_REG | |
413 | #endif | |
414 | #ifndef __PT_PARM2_SYSCALL_REG | |
415 | #define __PT_PARM2_SYSCALL_REG __PT_PARM2_REG | |
416 | #endif | |
417 | #ifndef __PT_PARM3_SYSCALL_REG | |
418 | #define __PT_PARM3_SYSCALL_REG __PT_PARM3_REG | |
419 | #endif | |
420 | #ifndef __PT_PARM4_SYSCALL_REG | |
421 | #define __PT_PARM4_SYSCALL_REG __PT_PARM4_REG | |
422 | #endif | |
423 | #ifndef __PT_PARM5_SYSCALL_REG | |
424 | #define __PT_PARM5_SYSCALL_REG __PT_PARM5_REG | |
425 | #endif | |
426 | #ifndef __PT_PARM6_SYSCALL_REG | |
427 | #define __PT_PARM6_SYSCALL_REG __PT_PARM6_REG | |
428 | #endif | |
429 | #ifndef __PT_PARM7_SYSCALL_REG | |
430 | #define __PT_PARM7_SYSCALL_REG __unsupported__ | |
431 | #endif | |
3c59623d | 432 | |
3cc31d79 AN |
433 | #define PT_REGS_PARM1(x) (__PT_REGS_CAST(x)->__PT_PARM1_REG) |
434 | #define PT_REGS_PARM2(x) (__PT_REGS_CAST(x)->__PT_PARM2_REG) | |
435 | #define PT_REGS_PARM3(x) (__PT_REGS_CAST(x)->__PT_PARM3_REG) | |
436 | #define PT_REGS_PARM4(x) (__PT_REGS_CAST(x)->__PT_PARM4_REG) | |
437 | #define PT_REGS_PARM5(x) (__PT_REGS_CAST(x)->__PT_PARM5_REG) | |
3c59623d AN |
438 | #define PT_REGS_PARM6(x) (__PT_REGS_CAST(x)->__PT_PARM6_REG) |
439 | #define PT_REGS_PARM7(x) (__PT_REGS_CAST(x)->__PT_PARM7_REG) | |
440 | #define PT_REGS_PARM8(x) (__PT_REGS_CAST(x)->__PT_PARM8_REG) | |
3cc31d79 AN |
441 | #define PT_REGS_RET(x) (__PT_REGS_CAST(x)->__PT_RET_REG) |
442 | #define PT_REGS_FP(x) (__PT_REGS_CAST(x)->__PT_FP_REG) | |
443 | #define PT_REGS_RC(x) (__PT_REGS_CAST(x)->__PT_RC_REG) | |
444 | #define PT_REGS_SP(x) (__PT_REGS_CAST(x)->__PT_SP_REG) | |
445 | #define PT_REGS_IP(x) (__PT_REGS_CAST(x)->__PT_IP_REG) | |
446 | ||
447 | #define PT_REGS_PARM1_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM1_REG) | |
448 | #define PT_REGS_PARM2_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM2_REG) | |
449 | #define PT_REGS_PARM3_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM3_REG) | |
450 | #define PT_REGS_PARM4_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM4_REG) | |
451 | #define PT_REGS_PARM5_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM5_REG) | |
3c59623d AN |
452 | #define PT_REGS_PARM6_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM6_REG) |
453 | #define PT_REGS_PARM7_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM7_REG) | |
454 | #define PT_REGS_PARM8_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM8_REG) | |
3cc31d79 AN |
455 | #define PT_REGS_RET_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_RET_REG) |
456 | #define PT_REGS_FP_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_FP_REG) | |
457 | #define PT_REGS_RC_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_RC_REG) | |
458 | #define PT_REGS_SP_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_SP_REG) | |
459 | #define PT_REGS_IP_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_IP_REG) | |
460 | ||
3ac4dbe3 | 461 | #if defined(bpf_target_powerpc) |
3cc31d79 | 462 | |
3ac4dbe3 AN |
463 | #define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ (ip) = (ctx)->link; }) |
464 | #define BPF_KRETPROBE_READ_RET_IP BPF_KPROBE_READ_RET_IP | |
3cc31d79 | 465 | |
3ac4dbe3 | 466 | #elif defined(bpf_target_sparc) |
3cc31d79 | 467 | |
3ac4dbe3 AN |
468 | #define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ (ip) = PT_REGS_RET(ctx); }) |
469 | #define BPF_KRETPROBE_READ_RET_IP BPF_KPROBE_READ_RET_IP | |
3cc31d79 AN |
470 | |
471 | #else | |
472 | ||
3ac4dbe3 | 473 | #define BPF_KPROBE_READ_RET_IP(ip, ctx) \ |
70785cfb | 474 | ({ bpf_probe_read_kernel(&(ip), sizeof(ip), (void *)PT_REGS_RET(ctx)); }) |
3ac4dbe3 | 475 | #define BPF_KRETPROBE_READ_RET_IP(ip, ctx) \ |
3cc31d79 AN |
476 | ({ bpf_probe_read_kernel(&(ip), sizeof(ip), (void *)(PT_REGS_FP(ctx) + sizeof(ip))); }) |
477 | ||
3ac4dbe3 AN |
478 | #endif |
479 | ||
60d16c5c | 480 | #ifndef PT_REGS_PARM1_SYSCALL |
8ccabeef AN |
481 | #define PT_REGS_PARM1_SYSCALL(x) (__PT_REGS_CAST(x)->__PT_PARM1_SYSCALL_REG) |
482 | #define PT_REGS_PARM1_CORE_SYSCALL(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM1_SYSCALL_REG) | |
483 | #endif | |
484 | #ifndef PT_REGS_PARM2_SYSCALL | |
485 | #define PT_REGS_PARM2_SYSCALL(x) (__PT_REGS_CAST(x)->__PT_PARM2_SYSCALL_REG) | |
486 | #define PT_REGS_PARM2_CORE_SYSCALL(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM2_SYSCALL_REG) | |
487 | #endif | |
488 | #ifndef PT_REGS_PARM3_SYSCALL | |
489 | #define PT_REGS_PARM3_SYSCALL(x) (__PT_REGS_CAST(x)->__PT_PARM3_SYSCALL_REG) | |
490 | #define PT_REGS_PARM3_CORE_SYSCALL(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM3_SYSCALL_REG) | |
60d16c5c | 491 | #endif |
60d16c5c | 492 | #ifndef PT_REGS_PARM4_SYSCALL |
8ccabeef AN |
493 | #define PT_REGS_PARM4_SYSCALL(x) (__PT_REGS_CAST(x)->__PT_PARM4_SYSCALL_REG) |
494 | #define PT_REGS_PARM4_CORE_SYSCALL(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM4_SYSCALL_REG) | |
d084df3b | 495 | #endif |
8ccabeef AN |
496 | #ifndef PT_REGS_PARM5_SYSCALL |
497 | #define PT_REGS_PARM5_SYSCALL(x) (__PT_REGS_CAST(x)->__PT_PARM5_SYSCALL_REG) | |
498 | #define PT_REGS_PARM5_CORE_SYSCALL(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM5_SYSCALL_REG) | |
499 | #endif | |
500 | #ifndef PT_REGS_PARM6_SYSCALL | |
501 | #define PT_REGS_PARM6_SYSCALL(x) (__PT_REGS_CAST(x)->__PT_PARM6_SYSCALL_REG) | |
502 | #define PT_REGS_PARM6_CORE_SYSCALL(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM6_SYSCALL_REG) | |
60d16c5c | 503 | #endif |
8ccabeef AN |
504 | #ifndef PT_REGS_PARM7_SYSCALL |
505 | #define PT_REGS_PARM7_SYSCALL(x) (__PT_REGS_CAST(x)->__PT_PARM7_SYSCALL_REG) | |
506 | #define PT_REGS_PARM7_CORE_SYSCALL(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM7_SYSCALL_REG) | |
d084df3b | 507 | #endif |
d084df3b | 508 | |
3cc31d79 | 509 | #else /* defined(bpf_target_defined) */ |
4a638d58 LB |
510 | |
511 | #define PT_REGS_PARM1(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
512 | #define PT_REGS_PARM2(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
513 | #define PT_REGS_PARM3(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
514 | #define PT_REGS_PARM4(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
515 | #define PT_REGS_PARM5(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
3c59623d AN |
516 | #define PT_REGS_PARM6(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) |
517 | #define PT_REGS_PARM7(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
518 | #define PT_REGS_PARM8(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
4a638d58 LB |
519 | #define PT_REGS_RET(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) |
520 | #define PT_REGS_FP(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
521 | #define PT_REGS_RC(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
522 | #define PT_REGS_SP(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
523 | #define PT_REGS_IP(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
524 | ||
525 | #define PT_REGS_PARM1_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
526 | #define PT_REGS_PARM2_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
527 | #define PT_REGS_PARM3_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
528 | #define PT_REGS_PARM4_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
529 | #define PT_REGS_PARM5_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
3c59623d AN |
530 | #define PT_REGS_PARM6_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) |
531 | #define PT_REGS_PARM7_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
532 | #define PT_REGS_PARM8_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
4a638d58 LB |
533 | #define PT_REGS_RET_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) |
534 | #define PT_REGS_FP_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
535 | #define PT_REGS_RC_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
536 | #define PT_REGS_SP_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
537 | #define PT_REGS_IP_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
538 | ||
539 | #define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
540 | #define BPF_KRETPROBE_READ_RET_IP(ip, ctx) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
541 | ||
d084df3b KT |
542 | #define PT_REGS_PARM1_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) |
543 | #define PT_REGS_PARM2_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
544 | #define PT_REGS_PARM3_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
545 | #define PT_REGS_PARM4_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
546 | #define PT_REGS_PARM5_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
8ccabeef AN |
547 | #define PT_REGS_PARM6_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) |
548 | #define PT_REGS_PARM7_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
d084df3b KT |
549 | |
550 | #define PT_REGS_PARM1_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
551 | #define PT_REGS_PARM2_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
552 | #define PT_REGS_PARM3_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
553 | #define PT_REGS_PARM4_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
554 | #define PT_REGS_PARM5_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
8ccabeef AN |
555 | #define PT_REGS_PARM6_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) |
556 | #define PT_REGS_PARM7_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; }) | |
d084df3b | 557 | |
3cc31d79 | 558 | #endif /* defined(bpf_target_defined) */ |
4a638d58 | 559 | |
c5a1ffa0 IL |
560 | /* |
561 | * When invoked from a syscall handler kprobe, returns a pointer to a | |
562 | * struct pt_regs containing syscall arguments and suitable for passing to | |
563 | * PT_REGS_PARMn_SYSCALL() and PT_REGS_PARMn_CORE_SYSCALL(). | |
564 | */ | |
565 | #ifndef PT_REGS_SYSCALL_REGS | |
566 | /* By default, assume that the arch selects ARCH_HAS_SYSCALL_WRAPPER. */ | |
567 | #define PT_REGS_SYSCALL_REGS(ctx) ((struct pt_regs *)PT_REGS_PARM1(ctx)) | |
568 | #endif | |
569 | ||
d6a6a555 | 570 | #ifndef ___bpf_concat |
df8ff353 | 571 | #define ___bpf_concat(a, b) a ## b |
d6a6a555 FR |
572 | #endif |
573 | #ifndef ___bpf_apply | |
df8ff353 | 574 | #define ___bpf_apply(fn, n) ___bpf_concat(fn, n) |
d6a6a555 FR |
575 | #endif |
576 | #ifndef ___bpf_nth | |
df8ff353 | 577 | #define ___bpf_nth(_, _1, _2, _3, _4, _5, _6, _7, _8, _9, _a, _b, _c, N, ...) N |
d6a6a555 FR |
578 | #endif |
579 | #ifndef ___bpf_narg | |
f60edf5b | 580 | #define ___bpf_narg(...) ___bpf_nth(_, ##__VA_ARGS__, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0) |
d6a6a555 | 581 | #endif |
df8ff353 | 582 | |
f60edf5b AN |
583 | #define ___bpf_ctx_cast0() ctx |
584 | #define ___bpf_ctx_cast1(x) ___bpf_ctx_cast0(), (void *)ctx[0] | |
585 | #define ___bpf_ctx_cast2(x, args...) ___bpf_ctx_cast1(args), (void *)ctx[1] | |
586 | #define ___bpf_ctx_cast3(x, args...) ___bpf_ctx_cast2(args), (void *)ctx[2] | |
587 | #define ___bpf_ctx_cast4(x, args...) ___bpf_ctx_cast3(args), (void *)ctx[3] | |
588 | #define ___bpf_ctx_cast5(x, args...) ___bpf_ctx_cast4(args), (void *)ctx[4] | |
589 | #define ___bpf_ctx_cast6(x, args...) ___bpf_ctx_cast5(args), (void *)ctx[5] | |
590 | #define ___bpf_ctx_cast7(x, args...) ___bpf_ctx_cast6(args), (void *)ctx[6] | |
591 | #define ___bpf_ctx_cast8(x, args...) ___bpf_ctx_cast7(args), (void *)ctx[7] | |
592 | #define ___bpf_ctx_cast9(x, args...) ___bpf_ctx_cast8(args), (void *)ctx[8] | |
df8ff353 AN |
593 | #define ___bpf_ctx_cast10(x, args...) ___bpf_ctx_cast9(args), (void *)ctx[9] |
594 | #define ___bpf_ctx_cast11(x, args...) ___bpf_ctx_cast10(args), (void *)ctx[10] | |
595 | #define ___bpf_ctx_cast12(x, args...) ___bpf_ctx_cast11(args), (void *)ctx[11] | |
f60edf5b | 596 | #define ___bpf_ctx_cast(args...) ___bpf_apply(___bpf_ctx_cast, ___bpf_narg(args))(args) |
df8ff353 AN |
597 | |
598 | /* | |
599 | * BPF_PROG is a convenience wrapper for generic tp_btf/fentry/fexit and | |
600 | * similar kinds of BPF programs, that accept input arguments as a single | |
601 | * pointer to untyped u64 array, where each u64 can actually be a typed | |
602 | * pointer or integer of different size. Instead of requring user to write | |
603 | * manual casts and work with array elements by index, BPF_PROG macro | |
604 | * allows user to declare a list of named and typed input arguments in the | |
605 | * same syntax as for normal C function. All the casting is hidden and | |
606 | * performed transparently, while user code can just assume working with | |
607 | * function arguments of specified type and name. | |
608 | * | |
609 | * Original raw context argument is preserved as well as 'ctx' argument. | |
610 | * This is useful when using BPF helpers that expect original context | |
611 | * as one of the parameters (e.g., for bpf_perf_event_output()). | |
612 | */ | |
613 | #define BPF_PROG(name, args...) \ | |
614 | name(unsigned long long *ctx); \ | |
d25f40ff | 615 | static __always_inline typeof(name(0)) \ |
df8ff353 AN |
616 | ____##name(unsigned long long *ctx, ##args); \ |
617 | typeof(name(0)) name(unsigned long long *ctx) \ | |
618 | { \ | |
619 | _Pragma("GCC diagnostic push") \ | |
620 | _Pragma("GCC diagnostic ignored \"-Wint-conversion\"") \ | |
621 | return ____##name(___bpf_ctx_cast(args)); \ | |
622 | _Pragma("GCC diagnostic pop") \ | |
623 | } \ | |
d25f40ff | 624 | static __always_inline typeof(name(0)) \ |
df8ff353 AN |
625 | ____##name(unsigned long long *ctx, ##args) |
626 | ||
9f2f5d78 YS |
627 | #ifndef ___bpf_nth2 |
628 | #define ___bpf_nth2(_, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, \ | |
629 | _14, _15, _16, _17, _18, _19, _20, _21, _22, _23, _24, N, ...) N | |
34586d29 | 630 | #endif |
9f2f5d78 YS |
631 | #ifndef ___bpf_narg2 |
632 | #define ___bpf_narg2(...) \ | |
633 | ___bpf_nth2(_, ##__VA_ARGS__, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, \ | |
634 | 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0) | |
34586d29 YS |
635 | #endif |
636 | ||
9f2f5d78 YS |
637 | #define ___bpf_treg_cnt(t) \ |
638 | __builtin_choose_expr(sizeof(t) == 1, 1, \ | |
639 | __builtin_choose_expr(sizeof(t) == 2, 1, \ | |
640 | __builtin_choose_expr(sizeof(t) == 4, 1, \ | |
641 | __builtin_choose_expr(sizeof(t) == 8, 1, \ | |
642 | __builtin_choose_expr(sizeof(t) == 16, 2, \ | |
34586d29 YS |
643 | (void)0))))) |
644 | ||
9f2f5d78 YS |
645 | #define ___bpf_reg_cnt0() (0) |
646 | #define ___bpf_reg_cnt1(t, x) (___bpf_reg_cnt0() + ___bpf_treg_cnt(t)) | |
647 | #define ___bpf_reg_cnt2(t, x, args...) (___bpf_reg_cnt1(args) + ___bpf_treg_cnt(t)) | |
648 | #define ___bpf_reg_cnt3(t, x, args...) (___bpf_reg_cnt2(args) + ___bpf_treg_cnt(t)) | |
649 | #define ___bpf_reg_cnt4(t, x, args...) (___bpf_reg_cnt3(args) + ___bpf_treg_cnt(t)) | |
650 | #define ___bpf_reg_cnt5(t, x, args...) (___bpf_reg_cnt4(args) + ___bpf_treg_cnt(t)) | |
651 | #define ___bpf_reg_cnt6(t, x, args...) (___bpf_reg_cnt5(args) + ___bpf_treg_cnt(t)) | |
652 | #define ___bpf_reg_cnt7(t, x, args...) (___bpf_reg_cnt6(args) + ___bpf_treg_cnt(t)) | |
653 | #define ___bpf_reg_cnt8(t, x, args...) (___bpf_reg_cnt7(args) + ___bpf_treg_cnt(t)) | |
654 | #define ___bpf_reg_cnt9(t, x, args...) (___bpf_reg_cnt8(args) + ___bpf_treg_cnt(t)) | |
655 | #define ___bpf_reg_cnt10(t, x, args...) (___bpf_reg_cnt9(args) + ___bpf_treg_cnt(t)) | |
656 | #define ___bpf_reg_cnt11(t, x, args...) (___bpf_reg_cnt10(args) + ___bpf_treg_cnt(t)) | |
657 | #define ___bpf_reg_cnt12(t, x, args...) (___bpf_reg_cnt11(args) + ___bpf_treg_cnt(t)) | |
658 | #define ___bpf_reg_cnt(args...) ___bpf_apply(___bpf_reg_cnt, ___bpf_narg2(args))(args) | |
659 | ||
660 | #define ___bpf_union_arg(t, x, n) \ | |
661 | __builtin_choose_expr(sizeof(t) == 1, ({ union { __u8 z[1]; t x; } ___t = { .z = {ctx[n]}}; ___t.x; }), \ | |
662 | __builtin_choose_expr(sizeof(t) == 2, ({ union { __u16 z[1]; t x; } ___t = { .z = {ctx[n]} }; ___t.x; }), \ | |
663 | __builtin_choose_expr(sizeof(t) == 4, ({ union { __u32 z[1]; t x; } ___t = { .z = {ctx[n]} }; ___t.x; }), \ | |
664 | __builtin_choose_expr(sizeof(t) == 8, ({ union { __u64 z[1]; t x; } ___t = {.z = {ctx[n]} }; ___t.x; }), \ | |
665 | __builtin_choose_expr(sizeof(t) == 16, ({ union { __u64 z[2]; t x; } ___t = {.z = {ctx[n], ctx[n + 1]} }; ___t.x; }), \ | |
666 | (void)0))))) | |
667 | ||
668 | #define ___bpf_ctx_arg0(n, args...) | |
669 | #define ___bpf_ctx_arg1(n, t, x) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt1(t, x)) | |
670 | #define ___bpf_ctx_arg2(n, t, x, args...) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt2(t, x, args)) ___bpf_ctx_arg1(n, args) | |
671 | #define ___bpf_ctx_arg3(n, t, x, args...) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt3(t, x, args)) ___bpf_ctx_arg2(n, args) | |
672 | #define ___bpf_ctx_arg4(n, t, x, args...) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt4(t, x, args)) ___bpf_ctx_arg3(n, args) | |
673 | #define ___bpf_ctx_arg5(n, t, x, args...) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt5(t, x, args)) ___bpf_ctx_arg4(n, args) | |
674 | #define ___bpf_ctx_arg6(n, t, x, args...) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt6(t, x, args)) ___bpf_ctx_arg5(n, args) | |
675 | #define ___bpf_ctx_arg7(n, t, x, args...) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt7(t, x, args)) ___bpf_ctx_arg6(n, args) | |
676 | #define ___bpf_ctx_arg8(n, t, x, args...) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt8(t, x, args)) ___bpf_ctx_arg7(n, args) | |
677 | #define ___bpf_ctx_arg9(n, t, x, args...) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt9(t, x, args)) ___bpf_ctx_arg8(n, args) | |
678 | #define ___bpf_ctx_arg10(n, t, x, args...) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt10(t, x, args)) ___bpf_ctx_arg9(n, args) | |
679 | #define ___bpf_ctx_arg11(n, t, x, args...) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt11(t, x, args)) ___bpf_ctx_arg10(n, args) | |
680 | #define ___bpf_ctx_arg12(n, t, x, args...) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt12(t, x, args)) ___bpf_ctx_arg11(n, args) | |
681 | #define ___bpf_ctx_arg(args...) ___bpf_apply(___bpf_ctx_arg, ___bpf_narg2(args))(___bpf_reg_cnt(args), args) | |
682 | ||
683 | #define ___bpf_ctx_decl0() | |
684 | #define ___bpf_ctx_decl1(t, x) , t x | |
685 | #define ___bpf_ctx_decl2(t, x, args...) , t x ___bpf_ctx_decl1(args) | |
686 | #define ___bpf_ctx_decl3(t, x, args...) , t x ___bpf_ctx_decl2(args) | |
687 | #define ___bpf_ctx_decl4(t, x, args...) , t x ___bpf_ctx_decl3(args) | |
688 | #define ___bpf_ctx_decl5(t, x, args...) , t x ___bpf_ctx_decl4(args) | |
689 | #define ___bpf_ctx_decl6(t, x, args...) , t x ___bpf_ctx_decl5(args) | |
690 | #define ___bpf_ctx_decl7(t, x, args...) , t x ___bpf_ctx_decl6(args) | |
691 | #define ___bpf_ctx_decl8(t, x, args...) , t x ___bpf_ctx_decl7(args) | |
692 | #define ___bpf_ctx_decl9(t, x, args...) , t x ___bpf_ctx_decl8(args) | |
693 | #define ___bpf_ctx_decl10(t, x, args...) , t x ___bpf_ctx_decl9(args) | |
694 | #define ___bpf_ctx_decl11(t, x, args...) , t x ___bpf_ctx_decl10(args) | |
695 | #define ___bpf_ctx_decl12(t, x, args...) , t x ___bpf_ctx_decl11(args) | |
696 | #define ___bpf_ctx_decl(args...) ___bpf_apply(___bpf_ctx_decl, ___bpf_narg2(args))(args) | |
34586d29 YS |
697 | |
698 | /* | |
9f2f5d78 YS |
699 | * BPF_PROG2 is an enhanced version of BPF_PROG in order to handle struct |
700 | * arguments. Since each struct argument might take one or two u64 values | |
701 | * in the trampoline stack, argument type size is needed to place proper number | |
702 | * of u64 values for each argument. Therefore, BPF_PROG2 has different | |
703 | * syntax from BPF_PROG. For example, for the following BPF_PROG syntax: | |
704 | * | |
705 | * int BPF_PROG(test2, int a, int b) { ... } | |
706 | * | |
707 | * the corresponding BPF_PROG2 syntax is: | |
708 | * | |
709 | * int BPF_PROG2(test2, int, a, int, b) { ... } | |
710 | * | |
711 | * where type and the corresponding argument name are separated by comma. | |
712 | * | |
713 | * Use BPF_PROG2 macro if one of the arguments might be a struct/union larger | |
714 | * than 8 bytes: | |
715 | * | |
716 | * int BPF_PROG2(test_struct_arg, struct bpf_testmod_struct_arg_1, a, int, b, | |
717 | * int, c, int, d, struct bpf_testmod_struct_arg_2, e, int, ret) | |
718 | * { | |
719 | * // access a, b, c, d, e, and ret directly | |
720 | * ... | |
721 | * } | |
34586d29 YS |
722 | */ |
723 | #define BPF_PROG2(name, args...) \ | |
724 | name(unsigned long long *ctx); \ | |
725 | static __always_inline typeof(name(0)) \ | |
9f2f5d78 | 726 | ____##name(unsigned long long *ctx ___bpf_ctx_decl(args)); \ |
34586d29 YS |
727 | typeof(name(0)) name(unsigned long long *ctx) \ |
728 | { \ | |
9f2f5d78 | 729 | return ____##name(ctx ___bpf_ctx_arg(args)); \ |
34586d29 YS |
730 | } \ |
731 | static __always_inline typeof(name(0)) \ | |
9f2f5d78 | 732 | ____##name(unsigned long long *ctx ___bpf_ctx_decl(args)) |
34586d29 | 733 | |
df8ff353 AN |
734 | struct pt_regs; |
735 | ||
f60edf5b AN |
736 | #define ___bpf_kprobe_args0() ctx |
737 | #define ___bpf_kprobe_args1(x) ___bpf_kprobe_args0(), (void *)PT_REGS_PARM1(ctx) | |
738 | #define ___bpf_kprobe_args2(x, args...) ___bpf_kprobe_args1(args), (void *)PT_REGS_PARM2(ctx) | |
739 | #define ___bpf_kprobe_args3(x, args...) ___bpf_kprobe_args2(args), (void *)PT_REGS_PARM3(ctx) | |
740 | #define ___bpf_kprobe_args4(x, args...) ___bpf_kprobe_args3(args), (void *)PT_REGS_PARM4(ctx) | |
741 | #define ___bpf_kprobe_args5(x, args...) ___bpf_kprobe_args4(args), (void *)PT_REGS_PARM5(ctx) | |
3c59623d AN |
742 | #define ___bpf_kprobe_args6(x, args...) ___bpf_kprobe_args5(args), (void *)PT_REGS_PARM6(ctx) |
743 | #define ___bpf_kprobe_args7(x, args...) ___bpf_kprobe_args6(args), (void *)PT_REGS_PARM7(ctx) | |
744 | #define ___bpf_kprobe_args8(x, args...) ___bpf_kprobe_args7(args), (void *)PT_REGS_PARM8(ctx) | |
f60edf5b | 745 | #define ___bpf_kprobe_args(args...) ___bpf_apply(___bpf_kprobe_args, ___bpf_narg(args))(args) |
df8ff353 AN |
746 | |
747 | /* | |
748 | * BPF_KPROBE serves the same purpose for kprobes as BPF_PROG for | |
749 | * tp_btf/fentry/fexit BPF programs. It hides the underlying platform-specific | |
750 | * low-level way of getting kprobe input arguments from struct pt_regs, and | |
751 | * provides a familiar typed and named function arguments syntax and | |
752 | * semantics of accessing kprobe input paremeters. | |
753 | * | |
754 | * Original struct pt_regs* context is preserved as 'ctx' argument. This might | |
755 | * be necessary when using BPF helpers like bpf_perf_event_output(). | |
756 | */ | |
757 | #define BPF_KPROBE(name, args...) \ | |
758 | name(struct pt_regs *ctx); \ | |
d25f40ff | 759 | static __always_inline typeof(name(0)) \ |
df8ff353 AN |
760 | ____##name(struct pt_regs *ctx, ##args); \ |
761 | typeof(name(0)) name(struct pt_regs *ctx) \ | |
762 | { \ | |
763 | _Pragma("GCC diagnostic push") \ | |
764 | _Pragma("GCC diagnostic ignored \"-Wint-conversion\"") \ | |
765 | return ____##name(___bpf_kprobe_args(args)); \ | |
766 | _Pragma("GCC diagnostic pop") \ | |
767 | } \ | |
d25f40ff | 768 | static __always_inline typeof(name(0)) \ |
df8ff353 AN |
769 | ____##name(struct pt_regs *ctx, ##args) |
770 | ||
f60edf5b AN |
771 | #define ___bpf_kretprobe_args0() ctx |
772 | #define ___bpf_kretprobe_args1(x) ___bpf_kretprobe_args0(), (void *)PT_REGS_RC(ctx) | |
773 | #define ___bpf_kretprobe_args(args...) ___bpf_apply(___bpf_kretprobe_args, ___bpf_narg(args))(args) | |
df8ff353 AN |
774 | |
775 | /* | |
776 | * BPF_KRETPROBE is similar to BPF_KPROBE, except, it only provides optional | |
777 | * return value (in addition to `struct pt_regs *ctx`), but no input | |
778 | * arguments, because they will be clobbered by the time probed function | |
779 | * returns. | |
780 | */ | |
781 | #define BPF_KRETPROBE(name, args...) \ | |
782 | name(struct pt_regs *ctx); \ | |
d25f40ff | 783 | static __always_inline typeof(name(0)) \ |
df8ff353 AN |
784 | ____##name(struct pt_regs *ctx, ##args); \ |
785 | typeof(name(0)) name(struct pt_regs *ctx) \ | |
786 | { \ | |
787 | _Pragma("GCC diagnostic push") \ | |
788 | _Pragma("GCC diagnostic ignored \"-Wint-conversion\"") \ | |
789 | return ____##name(___bpf_kretprobe_args(args)); \ | |
790 | _Pragma("GCC diagnostic pop") \ | |
791 | } \ | |
792 | static __always_inline typeof(name(0)) ____##name(struct pt_regs *ctx, ##args) | |
793 | ||
6f5d467d | 794 | /* If kernel has CONFIG_ARCH_HAS_SYSCALL_WRAPPER, read pt_regs directly */ |
816ae109 | 795 | #define ___bpf_syscall_args0() ctx |
6f5d467d AN |
796 | #define ___bpf_syscall_args1(x) ___bpf_syscall_args0(), (void *)PT_REGS_PARM1_SYSCALL(regs) |
797 | #define ___bpf_syscall_args2(x, args...) ___bpf_syscall_args1(args), (void *)PT_REGS_PARM2_SYSCALL(regs) | |
798 | #define ___bpf_syscall_args3(x, args...) ___bpf_syscall_args2(args), (void *)PT_REGS_PARM3_SYSCALL(regs) | |
799 | #define ___bpf_syscall_args4(x, args...) ___bpf_syscall_args3(args), (void *)PT_REGS_PARM4_SYSCALL(regs) | |
800 | #define ___bpf_syscall_args5(x, args...) ___bpf_syscall_args4(args), (void *)PT_REGS_PARM5_SYSCALL(regs) | |
8ccabeef AN |
801 | #define ___bpf_syscall_args6(x, args...) ___bpf_syscall_args5(args), (void *)PT_REGS_PARM6_SYSCALL(regs) |
802 | #define ___bpf_syscall_args7(x, args...) ___bpf_syscall_args6(args), (void *)PT_REGS_PARM7_SYSCALL(regs) | |
816ae109 HC |
803 | #define ___bpf_syscall_args(args...) ___bpf_apply(___bpf_syscall_args, ___bpf_narg(args))(args) |
804 | ||
6f5d467d AN |
805 | /* If kernel doesn't have CONFIG_ARCH_HAS_SYSCALL_WRAPPER, we have to BPF_CORE_READ from pt_regs */ |
806 | #define ___bpf_syswrap_args0() ctx | |
807 | #define ___bpf_syswrap_args1(x) ___bpf_syswrap_args0(), (void *)PT_REGS_PARM1_CORE_SYSCALL(regs) | |
808 | #define ___bpf_syswrap_args2(x, args...) ___bpf_syswrap_args1(args), (void *)PT_REGS_PARM2_CORE_SYSCALL(regs) | |
809 | #define ___bpf_syswrap_args3(x, args...) ___bpf_syswrap_args2(args), (void *)PT_REGS_PARM3_CORE_SYSCALL(regs) | |
810 | #define ___bpf_syswrap_args4(x, args...) ___bpf_syswrap_args3(args), (void *)PT_REGS_PARM4_CORE_SYSCALL(regs) | |
811 | #define ___bpf_syswrap_args5(x, args...) ___bpf_syswrap_args4(args), (void *)PT_REGS_PARM5_CORE_SYSCALL(regs) | |
8ccabeef AN |
812 | #define ___bpf_syswrap_args6(x, args...) ___bpf_syswrap_args5(args), (void *)PT_REGS_PARM6_CORE_SYSCALL(regs) |
813 | #define ___bpf_syswrap_args7(x, args...) ___bpf_syswrap_args6(args), (void *)PT_REGS_PARM7_CORE_SYSCALL(regs) | |
6f5d467d AN |
814 | #define ___bpf_syswrap_args(args...) ___bpf_apply(___bpf_syswrap_args, ___bpf_narg(args))(args) |
815 | ||
816ae109 | 816 | /* |
6f5d467d | 817 | * BPF_KSYSCALL is a variant of BPF_KPROBE, which is intended for |
816ae109 HC |
818 | * tracing syscall functions, like __x64_sys_close. It hides the underlying |
819 | * platform-specific low-level way of getting syscall input arguments from | |
820 | * struct pt_regs, and provides a familiar typed and named function arguments | |
821 | * syntax and semantics of accessing syscall input parameters. | |
822 | * | |
6f5d467d | 823 | * Original struct pt_regs * context is preserved as 'ctx' argument. This might |
816ae109 HC |
824 | * be necessary when using BPF helpers like bpf_perf_event_output(). |
825 | * | |
2d369b4b IL |
826 | * At the moment BPF_KSYSCALL does not transparently handle all the calling |
827 | * convention quirks for the following syscalls: | |
828 | * | |
829 | * - mmap(): __ARCH_WANT_SYS_OLD_MMAP. | |
830 | * - clone(): CONFIG_CLONE_BACKWARDS, CONFIG_CLONE_BACKWARDS2 and | |
831 | * CONFIG_CLONE_BACKWARDS3. | |
832 | * - socket-related syscalls: __ARCH_WANT_SYS_SOCKETCALL. | |
833 | * - compat syscalls. | |
834 | * | |
835 | * This may or may not change in the future. User needs to take extra measures | |
836 | * to handle such quirks explicitly, if necessary. | |
6f5d467d AN |
837 | * |
838 | * This macro relies on BPF CO-RE support and virtual __kconfig externs. | |
816ae109 | 839 | */ |
6f5d467d | 840 | #define BPF_KSYSCALL(name, args...) \ |
816ae109 | 841 | name(struct pt_regs *ctx); \ |
6f5d467d | 842 | extern _Bool LINUX_HAS_SYSCALL_WRAPPER __kconfig; \ |
d25f40ff | 843 | static __always_inline typeof(name(0)) \ |
816ae109 HC |
844 | ____##name(struct pt_regs *ctx, ##args); \ |
845 | typeof(name(0)) name(struct pt_regs *ctx) \ | |
846 | { \ | |
6f5d467d AN |
847 | struct pt_regs *regs = LINUX_HAS_SYSCALL_WRAPPER \ |
848 | ? (struct pt_regs *)PT_REGS_PARM1(ctx) \ | |
849 | : ctx; \ | |
816ae109 HC |
850 | _Pragma("GCC diagnostic push") \ |
851 | _Pragma("GCC diagnostic ignored \"-Wint-conversion\"") \ | |
6f5d467d AN |
852 | if (LINUX_HAS_SYSCALL_WRAPPER) \ |
853 | return ____##name(___bpf_syswrap_args(args)); \ | |
854 | else \ | |
855 | return ____##name(___bpf_syscall_args(args)); \ | |
816ae109 HC |
856 | _Pragma("GCC diagnostic pop") \ |
857 | } \ | |
d25f40ff | 858 | static __always_inline typeof(name(0)) \ |
816ae109 HC |
859 | ____##name(struct pt_regs *ctx, ##args) |
860 | ||
6f5d467d AN |
861 | #define BPF_KPROBE_SYSCALL BPF_KSYSCALL |
862 | ||
ac4afd6e AN |
863 | /* BPF_UPROBE and BPF_URETPROBE are identical to BPF_KPROBE and BPF_KRETPROBE, |
864 | * but are named way less confusingly for SEC("uprobe") and SEC("uretprobe") | |
865 | * use cases. | |
866 | */ | |
867 | #define BPF_UPROBE(name, args...) BPF_KPROBE(name, ##args) | |
868 | #define BPF_URETPROBE(name, args...) BPF_KRETPROBE(name, ##args) | |
869 | ||
3ac4dbe3 | 870 | #endif |