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a19931c9d3
Replaces sys.Iovec with a similar struct that uses uintptr instead of *byte for the base field when referring to addresses of the target process, so that we do not generate invalid pointers. Fixes #2919
40 lines
1.2 KiB
Go
40 lines
1.2 KiB
Go
//go:build (linux && amd64) || (linux && arm64)
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// +build linux,amd64 linux,arm64
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package native
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import (
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"syscall"
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"unsafe"
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sys "golang.org/x/sys/unix"
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)
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// processVmRead calls process_vm_readv
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func processVmRead(tid int, addr uintptr, data []byte) (int, error) {
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len_iov := uint64(len(data))
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local_iov := sys.Iovec{Base: &data[0], Len: len_iov}
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remote_iov := remoteIovec{base: addr, len: uintptr(len_iov)}
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p_local := uintptr(unsafe.Pointer(&local_iov))
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p_remote := uintptr(unsafe.Pointer(&remote_iov))
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n, _, err := syscall.Syscall6(sys.SYS_PROCESS_VM_READV, uintptr(tid), p_local, 1, p_remote, 1, 0)
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if err != syscall.Errno(0) {
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return 0, err
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}
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return int(n), nil
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}
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// processVmWrite calls process_vm_writev
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func processVmWrite(tid int, addr uintptr, data []byte) (int, error) {
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len_iov := uint64(len(data))
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local_iov := sys.Iovec{Base: &data[0], Len: len_iov}
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remote_iov := remoteIovec{base: addr, len: uintptr(len_iov)}
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p_local := uintptr(unsafe.Pointer(&local_iov))
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p_remote := uintptr(unsafe.Pointer(&remote_iov))
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n, _, err := syscall.Syscall6(sys.SYS_PROCESS_VM_WRITEV, uintptr(tid), p_local, 1, p_remote, 1, 0)
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if err != syscall.Errno(0) {
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return 0, err
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}
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return int(n), nil
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}
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