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https://github.com/google/sandboxed-api.git
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21f7373e76
This is a work in progress: - Syscall tables need work - Only tested on real hardware using one of our test hosts As a drive-by, this change also enables the open source version to function on POWER. Another side-effect of this change is that the default policies no longer check for different host architectures at runtime. On x86_64, we do not need to check for PPC or AArch64 specifice and vice versa. PiperOrigin-RevId: 331137472 Change-Id: Ic6d6be5cbe61d83dbe13d5a0be036871754b2eb8
89 lines
2.6 KiB
C++
89 lines
2.6 KiB
C++
// Copyright 2019 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "sandboxed_api/sandbox2/syscall.h"
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#include <linux/audit.h>
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#include <linux/elf-em.h>
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#include <climits>
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#include <csignal>
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#include <cstring>
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#include <string>
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#include <glog/logging.h>
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#include "absl/strings/str_format.h"
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#include "absl/strings/str_join.h"
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#include "sandboxed_api/sandbox2/config.h"
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#include "sandboxed_api/sandbox2/syscall_defs.h"
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#ifndef AUDIT_ARCH_PPC64LE
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#define AUDIT_ARCH_PPC64LE (EM_PPC64 | __AUDIT_ARCH_64BIT | __AUDIT_ARCH_LE)
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#endif
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namespace sandbox2 {
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std::string Syscall::GetArchDescription(cpu::Architecture arch) {
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switch (arch) {
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case cpu::kX8664:
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return "[X86-64]";
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case cpu::kX86:
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return "[X86-32]";
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case cpu::kPPC64LE:
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return "[PPC-64]";
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case cpu::kArm64:
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return "[Arm-64]";
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default:
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LOG(ERROR) << "Unknown CPU architecture: " << arch;
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return absl::StrFormat("[UNKNOWN_ARCH:%d]", arch);
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}
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}
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uint32_t Syscall::GetHostAuditArch() {
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switch (host_cpu::Architecture()) {
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case cpu::kX8664:
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return AUDIT_ARCH_X86_64;
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case cpu::kPPC64LE:
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return AUDIT_ARCH_PPC64LE;
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case cpu::kArm64:
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return AUDIT_ARCH_AARCH64;
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default:
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// The static_assert() in config.h should prevent us from ever getting
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// here.
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return 0; // Not reached
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}
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}
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std::string Syscall::GetName() const {
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if (absl::string_view name = SyscallTable::get(arch_).GetName(nr_);
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!name.empty()) {
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return std::string(name);
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}
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return absl::StrFormat("UNKNOWN[%d/0x%x]", nr_, nr_);
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}
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std::vector<std::string> Syscall::GetArgumentsDescription() const {
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return SyscallTable::get(arch_).GetArgumentsDescription(nr_, args_.data(),
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pid_);
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}
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std::string Syscall::GetDescription() const {
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const std::string arch = GetArchDescription(arch_);
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const std::string args = absl::StrJoin(GetArgumentsDescription(), ", ");
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return absl::StrFormat("%s %s [%d](%s) IP: %#x, STACK: %#x", arch, GetName(),
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nr_, args, ip_, sp_);
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}
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} // namespace sandbox2
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