| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "sandbox/linux/services/syscall_wrappers.h" |
| |
| #include <pthread.h> |
| #include <sched.h> |
| #include <setjmp.h> |
| #include <sys/resource.h> |
| #include <sys/syscall.h> |
| #include <sys/time.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #include "base/compiler_specific.h" |
| #include "base/logging.h" |
| #include "base/third_party/valgrind/valgrind.h" |
| #include "build/build_config.h" |
| #include "sandbox/linux/services/linux_syscalls.h" |
| |
| namespace sandbox { |
| |
| pid_t sys_getpid(void) { |
| return syscall(__NR_getpid); |
| } |
| |
| pid_t sys_gettid(void) { |
| return syscall(__NR_gettid); |
| } |
| |
| long sys_clone(unsigned long flags, |
| decltype(nullptr) child_stack, |
| pid_t* ptid, |
| pid_t* ctid, |
| decltype(nullptr) tls) { |
| const bool clone_tls_used = flags & CLONE_SETTLS; |
| const bool invalid_ctid = |
| (flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)) && !ctid; |
| const bool invalid_ptid = (flags & CLONE_PARENT_SETTID) && !ptid; |
| |
| // We do not support CLONE_VM. |
| const bool clone_vm_used = flags & CLONE_VM; |
| if (clone_tls_used || invalid_ctid || invalid_ptid || clone_vm_used) { |
| RAW_LOG(FATAL, "Invalid usage of sys_clone"); |
| } |
| |
| // See kernel/fork.c in Linux. There is different ordering of sys_clone |
| // parameters depending on CONFIG_CLONE_BACKWARDS* configuration options. |
| #if defined(ARCH_CPU_X86_64) |
| return syscall(__NR_clone, flags, child_stack, ptid, ctid, tls); |
| #elif defined(ARCH_CPU_X86) || defined(ARCH_CPU_ARM_FAMILY) || \ |
| defined(ARCH_CPU_MIPS_FAMILY) || defined(ARCH_CPU_MIPS64_FAMILY) |
| // CONFIG_CLONE_BACKWARDS defined. |
| return syscall(__NR_clone, flags, child_stack, ptid, tls, ctid); |
| #endif |
| } |
| |
| long sys_clone(unsigned long flags) { |
| return sys_clone(flags, nullptr, nullptr, nullptr, nullptr); |
| } |
| |
| void sys_exit_group(int status) { |
| syscall(__NR_exit_group, status); |
| } |
| |
| int sys_seccomp(unsigned int operation, |
| unsigned int flags, |
| const struct sock_fprog* args) { |
| return syscall(__NR_seccomp, operation, flags, args); |
| } |
| |
| int sys_prlimit64(pid_t pid, |
| int resource, |
| const struct rlimit64* new_limit, |
| struct rlimit64* old_limit) { |
| return syscall(__NR_prlimit64, pid, resource, new_limit, old_limit); |
| } |
| |
| } // namespace sandbox |