1 /* SPDX-License-Identifier: GPL-2.0 */
8 /* Expand a macro and then stringize the expansion */
9 #define QUOTE(str) #str
10 #define EXPAND_QUOTE(str) QUOTE(str)
12 /* This set of attributes controls behavior of the
13 * test_loader.c:test_loader__run_subtests().
15 * The test_loader sequentially loads each program in a skeleton.
16 * Programs could be loaded in privileged and unprivileged modes.
17 * - __success, __failure, __msg, __regex imply privileged mode;
18 * - __success_unpriv, __failure_unpriv, __msg_unpriv, __regex_unpriv
19 * imply unprivileged mode.
20 * If combination of privileged and unprivileged attributes is present
21 * both modes are used. If none are present privileged mode is implied.
23 * See test_loader.c:drop_capabilities() for exact set of capabilities
24 * that differ between privileged and unprivileged modes.
26 * For test filtering purposes the name of the program loaded in
27 * unprivileged mode is derived from the usual program name by adding
30 * __msg Message expected to be found in the verifier log.
31 * Multiple __msg attributes could be specified.
32 * To match a regular expression use "{{" "}}" brackets,
33 * e.g. "foo{{[0-9]+}}" matches strings like "foo007".
34 * Extended POSIX regular expression syntax is allowed
35 * inside the brackets.
36 * __msg_unpriv Same as __msg but for unprivileged mode.
38 * __xlated Expect a line in a disassembly log after verifier applies rewrites.
39 * Multiple __xlated attributes could be specified.
40 * Regular expressions could be specified same way as in __msg.
41 * __xlated_unpriv Same as __xlated but for unprivileged mode.
43 * __jited Match a line in a disassembly of the jited BPF program.
44 * Has to be used after __arch_* macro.
49 * __jited(" nopl (%rax,%rax)")
50 * __jited(" xorq %rax, %rax")
52 * __naked void some_test(void)
54 * asm volatile (... ::: __clobber_all);
57 * Regular expressions could be included in patterns same way
60 * By default assume that each pattern has to be matched on the
61 * next consecutive line of disassembly, e.g.:
63 * __jited(" endbr64") # matched on line N
64 * __jited(" nopl (%rax,%rax)") # matched on line N+1
66 * If match occurs on a wrong line an error is reported.
67 * To override this behaviour use literal "...", e.g.:
69 * __jited(" endbr64") # matched on line N
70 * __jited("...") # not matched
71 * __jited(" nopl (%rax,%rax)") # matched on any line >= N
73 * __jited_unpriv Same as __jited but for unprivileged mode.
76 * __success Expect program load success in privileged mode.
77 * __success_unpriv Expect program load success in unprivileged mode.
79 * __failure Expect program load failure in privileged mode.
80 * __failure_unpriv Expect program load failure in unprivileged mode.
82 * __retval Execute the program using BPF_PROG_TEST_RUN command,
83 * expect return value to match passed parameter:
85 * - a hexadecimal number, when starts from 0x
87 * - literal POINTER_VALUE (see definition below)
88 * - literal TEST_DATA_LEN (see definition below)
89 * __retval_unpriv Same, but load program in unprivileged mode.
91 * __description Text to be used instead of a program name for display
92 * and filtering purposes.
94 * __log_level Log level to use for the program, numeric value expected.
96 * __flag Adds one flag use for the program, the following values are valid:
97 * - BPF_F_STRICT_ALIGNMENT;
98 * - BPF_F_TEST_RND_HI32;
99 * - BPF_F_TEST_STATE_FREQ;
101 * - BPF_F_XDP_HAS_FRAGS;
103 * Multiple __flag attributes could be specified, the final flags
104 * value is derived by applying binary "or" to all specified values.
106 * __auxiliary Annotated program is not a separate test, but used as auxiliary
107 * for some other test cases and should always be loaded.
108 * __auxiliary_unpriv Same, but load program in unprivileged mode.
110 * __arch_* Specify on which architecture the test case should be tested.
111 * Several __arch_* annotations could be specified at once.
112 * When test case is not run on current arch it is marked as skipped.
113 * __caps_unpriv Specify the capabilities that should be set when running the test.
115 #define __msg(msg) __attribute__((btf_decl_tag("comment:test_expect_msg=" XSTR(__COUNTER__) "=" msg)))
116 #define __xlated(msg) __attribute__((btf_decl_tag("comment:test_expect_xlated=" XSTR(__COUNTER__) "=" msg)))
117 #define __jited(msg) __attribute__((btf_decl_tag("comment:test_jited=" XSTR(__COUNTER__) "=" msg)))
118 #define __failure __attribute__((btf_decl_tag("comment:test_expect_failure")))
119 #define __success __attribute__((btf_decl_tag("comment:test_expect_success")))
120 #define __description(desc) __attribute__((btf_decl_tag("comment:test_description=" desc)))
121 #define __msg_unpriv(msg) __attribute__((btf_decl_tag("comment:test_expect_msg_unpriv=" XSTR(__COUNTER__) "=" msg)))
122 #define __xlated_unpriv(msg) __attribute__((btf_decl_tag("comment:test_expect_xlated_unpriv=" XSTR(__COUNTER__) "=" msg)))
123 #define __jited_unpriv(msg) __attribute__((btf_decl_tag("comment:test_jited=" XSTR(__COUNTER__) "=" msg)))
124 #define __failure_unpriv __attribute__((btf_decl_tag("comment:test_expect_failure_unpriv")))
125 #define __success_unpriv __attribute__((btf_decl_tag("comment:test_expect_success_unpriv")))
126 #define __log_level(lvl) __attribute__((btf_decl_tag("comment:test_log_level="#lvl)))
127 #define __flag(flag) __attribute__((btf_decl_tag("comment:test_prog_flags="#flag)))
128 #define __retval(val) __attribute__((btf_decl_tag("comment:test_retval="#val)))
129 #define __retval_unpriv(val) __attribute__((btf_decl_tag("comment:test_retval_unpriv="#val)))
130 #define __auxiliary __attribute__((btf_decl_tag("comment:test_auxiliary")))
131 #define __auxiliary_unpriv __attribute__((btf_decl_tag("comment:test_auxiliary_unpriv")))
132 #define __btf_path(path) __attribute__((btf_decl_tag("comment:test_btf_path=" path)))
133 #define __arch(arch) __attribute__((btf_decl_tag("comment:test_arch=" arch)))
134 #define __arch_x86_64 __arch("X86_64")
135 #define __arch_arm64 __arch("ARM64")
136 #define __arch_riscv64 __arch("RISCV64")
137 #define __caps_unpriv(caps) __attribute__((btf_decl_tag("comment:test_caps_unpriv=" EXPAND_QUOTE(caps))))
139 /* Define common capabilities tested using __caps_unpriv */
140 #define CAP_NET_ADMIN 12
141 #define CAP_SYS_ADMIN 21
142 #define CAP_PERFMON 38
145 /* Convenience macro for use with 'asm volatile' blocks */
146 #define __naked __attribute__((naked))
147 #define __clobber_all "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "memory"
148 #define __clobber_common "r0", "r1", "r2", "r3", "r4", "r5", "memory"
149 #define __imm(name) [name]"i"(name)
150 #define __imm_const(name, expr) [name]"i"(expr)
151 #define __imm_addr(name) [name]"i"(&name)
152 #define __imm_ptr(name) [name]"r"(&name)
153 #define __imm_insn(name, expr) [name]"i"(*(long *)&(expr))
155 /* Magic constants used with __retval() */
156 #define POINTER_VALUE 0xcafe4all
157 #define TEST_DATA_LEN 64
160 #define __used __attribute__((used))
163 #if defined(__TARGET_ARCH_x86)
164 #define SYSCALL_WRAPPER 1
165 #define SYS_PREFIX "__x64_"
166 #elif defined(__TARGET_ARCH_s390)
167 #define SYSCALL_WRAPPER 1
168 #define SYS_PREFIX "__s390x_"
169 #elif defined(__TARGET_ARCH_arm64)
170 #define SYSCALL_WRAPPER 1
171 #define SYS_PREFIX "__arm64_"
172 #elif defined(__TARGET_ARCH_riscv)
173 #define SYSCALL_WRAPPER 1
174 #define SYS_PREFIX "__riscv_"
176 #define SYSCALL_WRAPPER 0
177 #define SYS_PREFIX "__se_"
180 /* How many arguments are passed to function in register */
181 #if defined(__TARGET_ARCH_x86) || defined(__x86_64__)
182 #define FUNC_REG_ARG_CNT 6
183 #elif defined(__i386__)
184 #define FUNC_REG_ARG_CNT 3
185 #elif defined(__TARGET_ARCH_s390) || defined(__s390x__)
186 #define FUNC_REG_ARG_CNT 5
187 #elif defined(__TARGET_ARCH_arm) || defined(__arm__)
188 #define FUNC_REG_ARG_CNT 4
189 #elif defined(__TARGET_ARCH_arm64) || defined(__aarch64__)
190 #define FUNC_REG_ARG_CNT 8
191 #elif defined(__TARGET_ARCH_mips) || defined(__mips__)
192 #define FUNC_REG_ARG_CNT 8
193 #elif defined(__TARGET_ARCH_powerpc) || defined(__powerpc__) || defined(__powerpc64__)
194 #define FUNC_REG_ARG_CNT 8
195 #elif defined(__TARGET_ARCH_sparc) || defined(__sparc__)
196 #define FUNC_REG_ARG_CNT 6
197 #elif defined(__TARGET_ARCH_riscv) || defined(__riscv__)
198 #define FUNC_REG_ARG_CNT 8
200 /* default to 5 for others */
201 #define FUNC_REG_ARG_CNT 5
204 /* make it look to compiler like value is read and written */
205 #define __sink(expr) asm volatile("" : "+g"(expr))
208 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))