1 // Copyright 2019 Google LLC
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 // https://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 #include "sandboxed_api/sandbox2/syscall.h"
16
17 #include <linux/audit.h>
18
19 #include <cstdint>
20 #include <string>
21 #include <vector>
22
23 #include "absl/strings/str_format.h"
24 #include "absl/strings/str_join.h"
25 #include "absl/strings/string_view.h"
26 #include "sandboxed_api/config.h"
27 #include "sandboxed_api/sandbox2/syscall_defs.h"
28
29 #ifndef AUDIT_ARCH_PPC64LE
30 #define AUDIT_ARCH_PPC64LE (EM_PPC64 | __AUDIT_ARCH_64BIT | __AUDIT_ARCH_LE)
31 #endif
32
33 namespace sandbox2 {
34
GetArchDescription(sapi::cpu::Architecture arch)35 std::string Syscall::GetArchDescription(sapi::cpu::Architecture arch) {
36 switch (arch) {
37 case sapi::cpu::kX8664:
38 return "[X86-64]";
39 case sapi::cpu::kX86:
40 return "[X86-32]";
41 case sapi::cpu::kPPC64LE:
42 return "[PPC-64]";
43 case sapi::cpu::kArm64:
44 return "[Arm-64]";
45 case sapi::cpu::kArm:
46 return "[Arm-32]";
47 default:
48 return absl::StrFormat("[UNKNOWN_ARCH:%d]", arch);
49 }
50 }
51
GetHostAuditArch()52 uint32_t Syscall::GetHostAuditArch() {
53 switch (sapi::host_cpu::Architecture()) {
54 case sapi::cpu::kX8664:
55 return AUDIT_ARCH_X86_64;
56 case sapi::cpu::kPPC64LE:
57 return AUDIT_ARCH_PPC64LE;
58 case sapi::cpu::kArm64:
59 return AUDIT_ARCH_AARCH64;
60 case sapi::cpu::kArm:
61 return AUDIT_ARCH_ARM;
62 default:
63 // The static_assert() in config.h should prevent us from ever getting
64 // here.
65 return 0; // Not reached
66 }
67 }
68
GetName() const69 std::string Syscall::GetName() const {
70 if (absl::string_view name = SyscallTable::get(arch_).GetName(nr_);
71 !name.empty()) {
72 return std::string(name);
73 }
74 return absl::StrFormat("UNKNOWN[%d/0x%x]", nr_, nr_);
75 }
76
GetArgumentsDescription() const77 std::vector<std::string> Syscall::GetArgumentsDescription() const {
78 return SyscallTable::get(arch_).GetArgumentsDescription(nr_, args_.data(),
79 pid_);
80 }
81
GetDescription() const82 std::string Syscall::GetDescription() const {
83 const std::string arch = GetArchDescription(arch_);
84 const std::string args = absl::StrJoin(GetArgumentsDescription(), ", ");
85 return absl::StrFormat("%s %s [%d](%s) IP: %#x, STACK: %#x", arch, GetName(),
86 nr_, args, ip_, sp_);
87 }
88
89 } // namespace sandbox2
90