| 1 | //===-- LibcGlue.cpp ------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // This file adds functions missing from libc on older versions of linux |
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| 10 | |
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| 11 | #include <cerrno> |
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| 12 | #include <lldb/Host/linux/Uio.h> |
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| 13 | #include <sys/syscall.h> |
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| 14 | #include <unistd.h> |
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| 15 | |
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| 16 | #if !HAVE_PROCESS_VM_READV |
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| 17 | // If the syscall wrapper is not available, provide one. |
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| 18 | ssize_t process_vm_readv(::pid_t pid, const struct iovec *local_iov, |
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| 19 | unsigned long liovcnt, const struct iovec *remote_iov, |
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| 20 | unsigned long riovcnt, unsigned long flags) { |
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| 21 | #if HAVE_NR_PROCESS_VM_READV |
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| 22 | // If we have the syscall number, we can issue the syscall ourselves. |
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| 23 | return syscall(__NR_process_vm_readv, pid, local_iov, liovcnt, remote_iov, |
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| 24 | riovcnt, flags); |
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| 25 | #else // If not, let's pretend the syscall is not present. |
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| 26 | errno = ENOSYS; |
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| 27 | return -1; |
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| 28 | #endif |
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| 29 | } |
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| 30 | #endif |
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| 31 | |
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