sandboxed-api/sandboxed_api/sandbox2/syscall.h

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// Copyright 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// The sandbox2::Syscalls class defines mostly static helper methods which
// are used to analyze the status of the sandboxed process.
#ifndef SANDBOXED_API_SANDBOX2_SYSCALL_H__
#define SANDBOXED_API_SANDBOX2_SYSCALL_H__
#include <sys/types.h>
#include <array>
#include <cstddef>
#include <cstdint>
#include <string>
#include <vector>
#include "sandboxed_api/sandbox2/config.h"
namespace sandbox2 {
class Syscall {
public:
// Maximum number of syscall arguments
static constexpr size_t kMaxArgs = 6;
using Args = std::array<uint64_t, kMaxArgs>;
// Returns the host architecture, according to CpuArch.
static constexpr cpu::Architecture GetHostArch() {
return host_cpu::Architecture();
}
// Returns the host architecture, according to <linux/audit.h>.
static uint32_t GetHostAuditArch();
// Returns a description of the architecture.
static std::string GetArchDescription(cpu::Architecture arch);
Syscall() = default;
Syscall(cpu::Architecture arch, uint64_t nr, Args args = {})
: arch_(arch), nr_(nr), args_(args) {}
pid_t pid() const { return pid_; }
uint64_t nr() const { return nr_; }
cpu::Architecture arch() const { return arch_; }
const Args& args() const { return args_; }
uint64_t stack_pointer() const { return sp_; }
uint64_t instruction_pointer() const { return ip_; }
std::string GetName() const;
std::vector<std::string> GetArgumentsDescription() const;
std::string GetDescription() const;
private:
friend class Regs;
explicit Syscall(pid_t pid) : pid_(pid) {}
Syscall(cpu::Architecture arch, uint64_t nr, Args args, pid_t pid,
uint64_t sp, uint64_t ip)
: arch_(arch), nr_(nr), args_(args), pid_(pid), sp_(sp), ip_(ip) {}
cpu::Architecture arch_ = cpu::kUnknown;
uint64_t nr_ = -1;
Args args_ = {};
pid_t pid_ = -1;
uint64_t sp_ = 0;
uint64_t ip_ = 0;
};
} // namespace sandbox2
#endif // SANDBOXED_API_SANDBOX2_SYSCALL_H__