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https://github.com/google/sandboxed-api.git
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177b969e8c
PiperOrigin-RevId: 238996664 Change-Id: I9646527e2be68ee0b6b371572b7aafe967102e57 Signed-off-by: Christian Blichmann <cblichmann@google.com>
91 lines
2.6 KiB
C++
91 lines
2.6 KiB
C++
// Copyright 2019 Google LLC. All Rights Reserved.
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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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// The sandbox2::Syscalls class defines mostly static helper methods which
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// are used to analyze status of the ptraced process
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#ifndef SANDBOXED_API_SANDBOX2_SYSCALL_H__
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#define SANDBOXED_API_SANDBOX2_SYSCALL_H__
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#include <sys/types.h>
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#include <array>
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#include <cstddef>
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#include <cstdint>
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#include <string>
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#include <vector>
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namespace sandbox2 {
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class Syscall {
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public:
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// Supported CPU architectures.
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// Linux: Use a magic value, so it can be easily spotted in the seccomp-bpf
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// bytecode decompilation stream. Must be < (1<<15), as/ that's the size of
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// data which can be returned by BPF.
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enum CpuArch {
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kUnknown = 0xCAF0,
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kX86_64,
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kX86_32,
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kPPC_64,
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};
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// Maximum number of syscall arguments
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static constexpr size_t kMaxArgs = 6;
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using Args = std::array<uint64_t, kMaxArgs>;
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// Returns the host architecture, according to CpuArch.
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static CpuArch GetHostArch();
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// Returns the host architecture, according to <linux/audit.h>.
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static uint32_t GetHostAuditArch();
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// Returns a description of the architecture.
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static std::string GetArchDescription(CpuArch arch);
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Syscall() = default;
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Syscall(CpuArch arch, uint64_t nr, Args args = {})
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: arch_(arch), nr_(nr), args_(args) {}
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pid_t pid() const { return pid_; }
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uint64_t nr() const { return nr_; }
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CpuArch arch() const { return arch_; }
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const Args& args() const { return args_; }
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uint64_t stack_pointer() const { return sp_; }
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uint64_t instruction_pointer() const { return ip_; }
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std::string GetName() const;
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std::vector<std::string> GetArgumentsDescription() const;
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std::string GetDescription() const;
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private:
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friend class Regs;
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Syscall(pid_t pid) : pid_(pid) {}
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Syscall(CpuArch arch, uint64_t nr, Args args, pid_t pid, uint64_t sp,
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uint64_t ip)
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: arch_(arch), nr_(nr), args_(args), pid_(pid), sp_(sp), ip_(ip) {}
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CpuArch arch_ = kUnknown;
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uint64_t nr_ = -1;
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Args args_ = {};
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pid_t pid_ = -1;
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uint64_t sp_ = 0;
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uint64_t ip_ = 0;
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};
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} // namespace sandbox2
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#endif // SANDBOXED_API_SANDBOX2_SYSCALL_H__
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