LLDB  mainline
linux/LibcGlue.cpp
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1 //===-- LibcGlue.cpp ------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // This file adds functions missing from libc on older versions of linux
10 
11 #include <cerrno>
12 #include <lldb/Host/linux/Uio.h>
13 #include <sys/syscall.h>
14 #include <unistd.h>
15 
16 #if !HAVE_PROCESS_VM_READV
17 // If the syscall wrapper is not available, provide one.
18 ssize_t process_vm_readv(::pid_t pid, const struct iovec *local_iov,
19  unsigned long liovcnt, const struct iovec *remote_iov,
20  unsigned long riovcnt, unsigned long flags) {
21 #if HAVE_NR_PROCESS_VM_READV
22  // If we have the syscall number, we can issue the syscall ourselves.
23  return syscall(__NR_process_vm_readv, pid, local_iov, liovcnt, remote_iov,
24  riovcnt, flags);
25 #else // If not, let's pretend the syscall is not present.
26  errno = ENOSYS;
27  return -1;
28 #endif
29 }
30 #endif
Uio.h
process_vm_readv
ssize_t process_vm_readv(::pid_t pid, const struct iovec *local_iov, unsigned long liovcnt, const struct iovec *remote_iov, unsigned long riovcnt, unsigned long flags)
Definition: linux/LibcGlue.cpp:18
lldb::pid_t
uint64_t pid_t
Definition: lldb-types.h:85