mirror of
https://github.com/google/sandboxed-api.git
synced 2024-03-22 13:11:30 +08:00
124 lines
3.1 KiB
C++
124 lines
3.1 KiB
C++
// Copyright 2019 Google LLC. All Rights Reserved.
|
|
//
|
|
// 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.
|
|
|
|
// This file defines the sandbox2::Regs class stores context of a process
|
|
// during ptrace stop events
|
|
|
|
#ifndef SANDBOXED_API_SANDBOX2_REGS_H_
|
|
#define SANDBOXED_API_SANDBOX2_REGS_H_
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <cstdint>
|
|
#include <string>
|
|
|
|
#include "sandboxed_api/sandbox2/syscall.h"
|
|
#include "sandboxed_api/sandbox2/violation.pb.h"
|
|
#include "sandboxed_api/util/status.h"
|
|
|
|
namespace sandbox2 {
|
|
|
|
// Helper class to get and modify running processes registers. Uses ptrace and
|
|
// assumes the process is already attached.
|
|
class Regs {
|
|
public:
|
|
#if !defined(__x86_64__) && !defined(__powerpc64__)
|
|
static_assert(false, "No support for the current CPU architecture");
|
|
#endif
|
|
|
|
explicit Regs(pid_t pid) : pid_(pid) {}
|
|
|
|
// Copies register values from the process
|
|
::sapi::Status Fetch();
|
|
|
|
// Copies register values to the process
|
|
::sapi::Status Store();
|
|
|
|
// Causes the process to skip current syscall and return given value instead
|
|
::sapi::Status SkipSyscallReturnValue(uint64_t value);
|
|
|
|
// Converts raw register values obtained on syscall entry to syscall info
|
|
Syscall ToSyscall(Syscall::CpuArch syscall_arch) const;
|
|
|
|
pid_t pid() const { return pid_; }
|
|
|
|
// Stores register values in a protobuf structure.
|
|
void StoreRegisterValuesInProtobuf(RegisterValues* values) const;
|
|
|
|
private:
|
|
friend class StackTracePeer;
|
|
|
|
struct PtraceRegisters {
|
|
#if defined(__x86_64__)
|
|
uint64_t r15;
|
|
uint64_t r14;
|
|
uint64_t r13;
|
|
uint64_t r12;
|
|
uint64_t rbp;
|
|
uint64_t rbx;
|
|
uint64_t r11;
|
|
uint64_t r10;
|
|
uint64_t r9;
|
|
uint64_t r8;
|
|
uint64_t rax;
|
|
uint64_t rcx;
|
|
uint64_t rdx;
|
|
uint64_t rsi;
|
|
uint64_t rdi;
|
|
uint64_t orig_rax;
|
|
uint64_t rip;
|
|
uint64_t cs;
|
|
uint64_t eflags;
|
|
uint64_t rsp;
|
|
uint64_t ss;
|
|
uint64_t fs_base;
|
|
uint64_t gs_base;
|
|
uint64_t ds;
|
|
uint64_t es;
|
|
uint64_t fs;
|
|
uint64_t gs;
|
|
#elif defined(__powerpc64__)
|
|
uint64_t gpr[32];
|
|
uint64_t nip;
|
|
uint64_t msr;
|
|
uint64_t orig_gpr3;
|
|
uint64_t ctr;
|
|
uint64_t link;
|
|
uint64_t xer;
|
|
uint64_t ccr;
|
|
uint64_t softe;
|
|
uint64_t trap;
|
|
uint64_t dar;
|
|
uint64_t dsisr;
|
|
uint64_t result;
|
|
// elf.h's ELF_NGREG says it's 48 registers, so kernel fills it in with some
|
|
// zeroes.
|
|
uint64_t zero0;
|
|
uint64_t zero1;
|
|
uint64_t zero2;
|
|
uint64_t zero3;
|
|
#endif
|
|
};
|
|
|
|
// PID for which registers are fetched/stored
|
|
pid_t pid_ = 0;
|
|
|
|
// Registers fetched with ptrace(PR_GETREGS/GETREGSET, pid).
|
|
PtraceRegisters user_regs_ = {};
|
|
};
|
|
|
|
} // namespace sandbox2
|
|
|
|
#endif // SANDBOXED_API_SANDBOX2_REGS_H_
|