Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 1 | // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "sandbox/linux/seccomp-bpf/sandbox_bpf.h" |
| 6 | #include "sandbox/linux/seccomp-bpf/syscall_iterator.h" |
| 7 | #include "sandbox/linux/tests/unit_tests.h" |
| 8 | |
Torne (Richard Coles) | a3f6a49 | 2013-12-18 16:25:09 +0000 | [diff] [blame] | 9 | namespace sandbox { |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 10 | |
| 11 | namespace { |
| 12 | |
| 13 | SANDBOX_TEST(SyscallIterator, Monotonous) { |
| 14 | for (int i = 0; i < 2; ++i) { |
Torne (Richard Coles) | f2477e0 | 2013-11-28 11:55:43 +0000 | [diff] [blame] | 15 | bool invalid_only = !i; // Testing both |invalid_only| cases. |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 16 | SyscallIterator iter(invalid_only); |
| 17 | uint32_t next = iter.Next(); |
| 18 | |
| 19 | if (!invalid_only) { |
| 20 | // The iterator should start at 0. |
| 21 | SANDBOX_ASSERT(next == 0); |
| 22 | } |
| 23 | for (uint32_t last = next; !iter.Done(); last = next) { |
| 24 | next = iter.Next(); |
| 25 | SANDBOX_ASSERT(last < next); |
| 26 | } |
| 27 | // The iterator should always return 0xFFFFFFFFu as the last value. |
| 28 | SANDBOX_ASSERT(next == 0xFFFFFFFFu); |
| 29 | } |
| 30 | } |
| 31 | |
Torne (Richard Coles) | 5f1c943 | 2014-08-12 13:47:38 +0100 | [diff] [blame] | 32 | #if defined(__mips__) |
| 33 | SANDBOX_TEST(SyscallIterator, PublicSyscallRangeMIPS) { |
| 34 | SyscallIterator iter(false); |
| 35 | uint32_t next = iter.Next(); |
| 36 | SANDBOX_ASSERT(next == 0); |
| 37 | |
| 38 | // Since on MIPS MIN_SYSCALL != 0 we need to move iterator to valid range. |
| 39 | next = iter.Next(); |
| 40 | SANDBOX_ASSERT(next == MIN_SYSCALL - 1); |
| 41 | |
| 42 | // The iterator should cover the public syscall range |
| 43 | // MIN_SYSCALL..MAX_PUBLIC_SYSCALL, without skipping syscalls. |
| 44 | for (uint32_t last = next; next < MAX_PUBLIC_SYSCALL + 1; last = next) { |
| 45 | SANDBOX_ASSERT((next = iter.Next()) == last + 1); |
| 46 | } |
| 47 | SANDBOX_ASSERT(next == MAX_PUBLIC_SYSCALL + 1); |
| 48 | } |
| 49 | #else |
| 50 | SANDBOX_TEST(SyscallIterator, PublicSyscallRangeIntelArm) { |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 51 | SyscallIterator iter(false); |
| 52 | uint32_t next = iter.Next(); |
| 53 | |
| 54 | // The iterator should cover the public syscall range |
| 55 | // MIN_SYSCALL..MAX_PUBLIC_SYSCALL, without skipping syscalls. |
| 56 | // We're assuming MIN_SYSCALL == 0 for all architectures, |
| 57 | // this is currently valid for Intel and ARM EABI. |
| 58 | SANDBOX_ASSERT(MIN_SYSCALL == 0); |
| 59 | SANDBOX_ASSERT(next == MIN_SYSCALL); |
| 60 | for (uint32_t last = next; next < MAX_PUBLIC_SYSCALL + 1; last = next) { |
| 61 | SANDBOX_ASSERT((next = iter.Next()) == last + 1); |
| 62 | } |
| 63 | SANDBOX_ASSERT(next == MAX_PUBLIC_SYSCALL + 1); |
| 64 | } |
Torne (Richard Coles) | 5f1c943 | 2014-08-12 13:47:38 +0100 | [diff] [blame] | 65 | #endif // defined(__mips__) |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 66 | |
| 67 | #if defined(__arm__) |
| 68 | SANDBOX_TEST(SyscallIterator, ARMPrivateSyscallRange) { |
| 69 | SyscallIterator iter(false); |
| 70 | uint32_t next = iter.Next(); |
| 71 | while (next < MIN_PRIVATE_SYSCALL - 1) { |
| 72 | next = iter.Next(); |
| 73 | } |
| 74 | // The iterator should cover the ARM private syscall range |
| 75 | // without skipping syscalls. |
| 76 | SANDBOX_ASSERT(next == MIN_PRIVATE_SYSCALL - 1); |
| 77 | for (uint32_t last = next; next < MAX_PRIVATE_SYSCALL + 1; last = next) { |
| 78 | SANDBOX_ASSERT((next = iter.Next()) == last + 1); |
| 79 | } |
| 80 | SANDBOX_ASSERT(next == MAX_PRIVATE_SYSCALL + 1); |
| 81 | } |
| 82 | |
| 83 | SANDBOX_TEST(SyscallIterator, ARMHiddenSyscallRange) { |
| 84 | SyscallIterator iter(false); |
| 85 | uint32_t next = iter.Next(); |
| 86 | while (next < MIN_GHOST_SYSCALL - 1) { |
| 87 | next = iter.Next(); |
| 88 | } |
| 89 | // The iterator should cover the ARM hidden syscall range |
| 90 | // without skipping syscalls. |
| 91 | SANDBOX_ASSERT(next == MIN_GHOST_SYSCALL - 1); |
| 92 | for (uint32_t last = next; next < MAX_SYSCALL + 1; last = next) { |
| 93 | SANDBOX_ASSERT((next = iter.Next()) == last + 1); |
| 94 | } |
| 95 | SANDBOX_ASSERT(next == MAX_SYSCALL + 1); |
| 96 | } |
| 97 | #endif |
| 98 | |
| 99 | SANDBOX_TEST(SyscallIterator, Invalid) { |
| 100 | for (int i = 0; i < 2; ++i) { |
Torne (Richard Coles) | f2477e0 | 2013-11-28 11:55:43 +0000 | [diff] [blame] | 101 | bool invalid_only = !i; // Testing both |invalid_only| cases. |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 102 | SyscallIterator iter(invalid_only); |
| 103 | uint32_t next = iter.Next(); |
| 104 | |
| 105 | while (next < MAX_SYSCALL + 1) { |
| 106 | next = iter.Next(); |
| 107 | } |
| 108 | |
| 109 | SANDBOX_ASSERT(next == MAX_SYSCALL + 1); |
| 110 | while (next < 0x7FFFFFFFu) { |
| 111 | next = iter.Next(); |
| 112 | } |
| 113 | |
| 114 | // The iterator should return the signed/unsigned corner cases. |
| 115 | SANDBOX_ASSERT(next == 0x7FFFFFFFu); |
| 116 | next = iter.Next(); |
| 117 | SANDBOX_ASSERT(next == 0x80000000u); |
| 118 | SANDBOX_ASSERT(!iter.Done()); |
| 119 | next = iter.Next(); |
| 120 | SANDBOX_ASSERT(iter.Done()); |
| 121 | SANDBOX_ASSERT(next == 0xFFFFFFFFu); |
| 122 | } |
| 123 | } |
| 124 | |
Torne (Richard Coles) | 5f1c943 | 2014-08-12 13:47:38 +0100 | [diff] [blame] | 125 | #if defined(__mips__) |
| 126 | SANDBOX_TEST(SyscallIterator, InvalidOnlyMIPS) { |
| 127 | bool invalid_only = true; |
| 128 | SyscallIterator iter(invalid_only); |
| 129 | uint32_t next = iter.Next(); |
| 130 | SANDBOX_ASSERT(next == 0); |
| 131 | // For Mips O32 ABI we're assuming MIN_SYSCALL == 4000. |
| 132 | SANDBOX_ASSERT(MIN_SYSCALL == 4000); |
| 133 | |
| 134 | // Since on MIPS MIN_SYSCALL != 0, we need to move iterator to valid range |
| 135 | // The iterator should skip until the last invalid syscall in this range. |
| 136 | next = iter.Next(); |
| 137 | SANDBOX_ASSERT(next == MIN_SYSCALL - 1); |
| 138 | next = iter.Next(); |
| 139 | // First next invalid syscall should then be |MAX_PUBLIC_SYSCALL + 1|. |
| 140 | SANDBOX_ASSERT(next == MAX_PUBLIC_SYSCALL + 1); |
| 141 | } |
| 142 | |
| 143 | #else |
| 144 | |
| 145 | SANDBOX_TEST(SyscallIterator, InvalidOnlyIntelArm) { |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 146 | bool invalid_only = true; |
| 147 | SyscallIterator iter(invalid_only); |
| 148 | uint32_t next = iter.Next(); |
| 149 | // We're assuming MIN_SYSCALL == 0 for all architectures, |
| 150 | // this is currently valid for Intel and ARM EABI. |
| 151 | // First invalid syscall should then be |MAX_PUBLIC_SYSCALL + 1|. |
| 152 | SANDBOX_ASSERT(MIN_SYSCALL == 0); |
| 153 | SANDBOX_ASSERT(next == MAX_PUBLIC_SYSCALL + 1); |
| 154 | |
| 155 | #if defined(__arm__) |
| 156 | next = iter.Next(); |
| 157 | // The iterator should skip until the last invalid syscall in this range. |
| 158 | SANDBOX_ASSERT(next == MIN_PRIVATE_SYSCALL - 1); |
| 159 | while (next <= MAX_PRIVATE_SYSCALL) { |
| 160 | next = iter.Next(); |
| 161 | } |
| 162 | |
| 163 | next = iter.Next(); |
| 164 | // The iterator should skip until the last invalid syscall in this range. |
| 165 | SANDBOX_ASSERT(next == MIN_GHOST_SYSCALL - 1); |
| 166 | while (next <= MAX_SYSCALL) { |
| 167 | next = iter.Next(); |
| 168 | } |
| 169 | SANDBOX_ASSERT(next == MAX_SYSCALL + 1); |
Torne (Richard Coles) | 5f1c943 | 2014-08-12 13:47:38 +0100 | [diff] [blame] | 170 | #endif // defined(__arm__) |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 171 | } |
Torne (Richard Coles) | 5f1c943 | 2014-08-12 13:47:38 +0100 | [diff] [blame] | 172 | #endif // defined(__mips__) |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 173 | |
| 174 | } // namespace |
Torne (Richard Coles) | a3f6a49 | 2013-12-18 16:25:09 +0000 | [diff] [blame] | 175 | |
| 176 | } // namespace sandbox |