| Jorge Lucangeli Obes | 106d97f | 2016-08-19 12:34:02 -0400 | [diff] [blame^] | 1 | /* Copyright (C) 2016 The Android Open Source Project |
| 2 | * |
| 3 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | * you may not use this file except in compliance with the License. |
| 5 | * You may obtain a copy of the License at |
| 6 | * |
| 7 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | * |
| 9 | * Unless required by applicable law or agreed to in writing, software |
| 10 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | * See the License for the specific language governing permissions and |
| 13 | * limitations under the License. |
| 14 | */ |
| 15 | |
| 16 | /* BPF testing macros. */ |
| 17 | #define EXPECT_EQ_BLOCK(_block, _code, _k, _jt, _jf) \ |
| 18 | do { \ |
| 19 | EXPECT_EQ((_block)->code, _code); \ |
| 20 | EXPECT_EQ((_block)->k, (unsigned int)(_k)); \ |
| 21 | EXPECT_EQ((_block)->jt, _jt); \ |
| 22 | EXPECT_EQ((_block)->jf, _jf); \ |
| 23 | } while (0) |
| 24 | |
| 25 | #define EXPECT_EQ_STMT(_block, _code, _k) \ |
| 26 | EXPECT_EQ_BLOCK(_block, _code, _k, 0, 0) |
| 27 | |
| 28 | #define EXPECT_COMP(_block) \ |
| 29 | do { \ |
| 30 | EXPECT_EQ((_block)->len, BPF_ARG_COMP_LEN + 1); \ |
| 31 | EXPECT_EQ((_block)->instrs->code, BPF_LD+BPF_W+BPF_ABS); \ |
| 32 | } while (0) |
| 33 | |
| 34 | #define EXPECT_LBL(_block) \ |
| 35 | do { \ |
| 36 | EXPECT_TRUE((_block)->code == (BPF_JMP+BPF_JA)); \ |
| 37 | EXPECT_TRUE((_block)->jt == LABEL_JT); \ |
| 38 | EXPECT_TRUE((_block)->jf == LABEL_JF); \ |
| 39 | } while (0) |
| 40 | |
| 41 | #define EXPECT_JUMP_LBL(_block) \ |
| 42 | do { \ |
| 43 | EXPECT_EQ((_block)->code, BPF_JMP+BPF_JA); \ |
| 44 | EXPECT_EQ((_block)->jt, JUMP_JT); \ |
| 45 | EXPECT_EQ((_block)->jf, JUMP_JF); \ |
| 46 | } while (0) |
| 47 | |
| 48 | #define EXPECT_GROUP_END(_block) \ |
| 49 | do { \ |
| 50 | EXPECT_EQ((_block)->len, 2U); \ |
| 51 | EXPECT_JUMP_LBL(&(_block)->instrs[0]); \ |
| 52 | EXPECT_LBL(&(_block)->instrs[1]); \ |
| 53 | } while (0) |
| 54 | |
| 55 | #define EXPECT_KILL(_block) \ |
| 56 | do { \ |
| 57 | EXPECT_EQ((_block)->len, 1U); \ |
| 58 | EXPECT_EQ_STMT((_block)->instrs, \ |
| 59 | BPF_RET+BPF_K, SECCOMP_RET_KILL); \ |
| 60 | } while (0) |
| 61 | |
| 62 | #define EXPECT_TRAP(_block) \ |
| 63 | do { \ |
| 64 | EXPECT_EQ((_block)->len, 1U); \ |
| 65 | EXPECT_EQ_STMT((_block)->instrs, \ |
| 66 | BPF_RET+BPF_K, SECCOMP_RET_TRAP); \ |
| 67 | } while (0) |
| 68 | |
| 69 | #define EXPECT_ALLOW(_block) \ |
| 70 | do { \ |
| 71 | EXPECT_EQ((_block)->len, 2U); \ |
| 72 | EXPECT_LBL(&(_block)->instrs[0]); \ |
| 73 | EXPECT_EQ_STMT(&(_block)->instrs[1], \ |
| 74 | BPF_RET+BPF_K, SECCOMP_RET_ALLOW); \ |
| 75 | } while (0) |
| 76 | |
| 77 | #define EXPECT_ARCH_VALIDATION(_filter) \ |
| 78 | do { \ |
| 79 | EXPECT_EQ_STMT(&(_filter)[0], BPF_LD+BPF_W+BPF_ABS, arch_nr); \ |
| 80 | EXPECT_EQ_BLOCK(&(_filter)[1], \ |
| 81 | BPF_JMP+BPF_JEQ+BPF_K, ARCH_NR, SKIP, NEXT); \ |
| 82 | EXPECT_EQ_STMT(&(_filter)[2], BPF_RET+BPF_K, SECCOMP_RET_KILL); \ |
| 83 | } while (0) |
| 84 | |
| 85 | #define EXPECT_ALLOW_SYSCALL(_filter, _nr) \ |
| 86 | do { \ |
| 87 | EXPECT_EQ_BLOCK(&(_filter)[0], \ |
| 88 | BPF_JMP+BPF_JEQ+BPF_K, (_nr), NEXT, SKIP); \ |
| 89 | EXPECT_EQ_STMT(&(_filter)[1], \ |
| 90 | BPF_RET+BPF_K, SECCOMP_RET_ALLOW); \ |
| 91 | } while (0) |
| 92 | |
| 93 | #define EXPECT_ALLOW_SYSCALL_ARGS(_filter, _nr, _id, _jt, _jf) \ |
| 94 | do { \ |
| 95 | EXPECT_EQ_BLOCK(&(_filter)[0], \ |
| 96 | BPF_JMP+BPF_JEQ+BPF_K, (_nr), NEXT, SKIP); \ |
| 97 | EXPECT_EQ_BLOCK(&(_filter)[1], \ |
| 98 | BPF_JMP+BPF_JA, (_id), (_jt), (_jf)); \ |
| 99 | } while (0) |