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95 lines
2.4 KiB
C++
95 lines
2.4 KiB
C++
#ifndef SANDBOXED_API_SANDBOX2_SYSCALL_DEFS_H_
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#define SANDBOXED_API_SANDBOX2_SYSCALL_DEFS_H_
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#include <sys/types.h>
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#include <array>
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#include <cstdint>
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#include <string>
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#include <vector>
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#include "absl/status/statusor.h"
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#include "absl/strings/string_view.h"
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#include "absl/types/span.h"
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#include "sandboxed_api/config.h"
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#include "sandboxed_api/sandbox2/syscall.h"
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namespace sandbox2 {
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namespace syscalls {
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constexpr int kMaxArgs = 6;
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// Type of a given syscall argument. Used with argument conversion routines.
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enum ArgType {
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kGen = 1,
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kInt,
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kPath,
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kHex,
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kOct,
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kSocketCall,
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kSocketCallPtr,
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kSignal,
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kString,
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kAddressFamily,
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kSockaddr,
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kSockmsghdr,
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kCloneFlag,
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};
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} // namespace syscalls
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class SyscallTable {
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public:
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// Single syscall definition
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struct Entry {
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// Returns the number of arguments which given syscall takes.
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int GetNumArgs() const {
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if (num_args < 0 || num_args > syscalls::kMaxArgs) {
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return syscalls::kMaxArgs;
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}
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return num_args;
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}
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static std::string GetArgumentDescription(uint64_t value,
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syscalls::ArgType type,
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pid_t pid);
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static constexpr bool BySyscallNr(const SyscallTable::Entry& a,
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const SyscallTable::Entry& b) {
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return a.nr < b.nr;
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}
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int nr;
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absl::string_view name;
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int num_args;
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std::array<syscalls::ArgType, syscalls::kMaxArgs> arg_types;
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};
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// Returns the syscall table for the architecture.
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static SyscallTable get(sapi::cpu::Architecture arch);
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int size() { return data_.size(); }
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absl::string_view GetName(int syscall) const;
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std::vector<std::string> GetArgumentsDescription(int syscall,
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const uint64_t values[],
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pid_t pid) const;
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absl::StatusOr<Entry> GetEntry(int syscall) const;
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// Returns the first entry matching the provided name.
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absl::StatusOr<Entry> GetEntry(absl::string_view name) const;
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absl::Span<const Entry> GetEntries() const { return data_; }
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private:
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constexpr SyscallTable() = default;
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explicit constexpr SyscallTable(absl::Span<const Entry> data) : data_(data) {}
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const absl::Span<const Entry> data_;
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};
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} // namespace sandbox2
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#endif // SANDBOXED_API_SANDBOX2_SYSCALL_DEFS_H_
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