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# zx_debug_read
## NAME
<!-- Updated by update-docs-from-fidl, do not edit. -->
TODO(fxbug.dev/32938)
## SYNOPSIS
<!-- Updated by update-docs-from-fidl, do not edit. -->
```c
#include <zircon/syscalls.h>
zx_status_t zx_debug_read(zx_handle_t handle,
char* buffer,
size_t buffer_size,
size_t* actual);
```
## DESCRIPTION
TODO(fxbug.dev/32938)
To use the `zx_debug_read()` function, you must specify
`kernel.enable-serial-syscalls=true` on the kernel command line. Otherwise,
the function returns **ZX_ERR_NOT_SUPPORTED**.
## RIGHTS
<!-- Updated by update-docs-from-fidl, do not edit. -->
*handle* must have resource kind **ZX_RSRC_KIND_ROOT**.
## RETURN VALUE
TODO(fxbug.dev/32938)
## ERRORS
TODO(fxbug.dev/32938)
**ZX_ERR_NOT_SUPPORTED** `kernel.enable-serial-syscalls` is not set to `true`
on the kernel command line.
## SEE ALSO
TODO(fxbug.dev/32938)