Re: Getting ARM Semihosting Syslog to work on RP2040

[Lwazi Dube]

On Thu, 16 Oct 2025 at 07:09, Jean Thomas <j...@lambdaconcept.com> wrote:

>
> Lwazi, did you do anything else to get it to use 0-terminated string?
>
> Jean
>

In streams.h, I add 1 to the buffer size:

struct lib_syslograwstream_s
{
  struct lib_outstream_s common;
#ifdef CONFIG_SYSLOG_BUFFER
  char buffer[CONFIG_SYSLOG_BUFSIZE + 1]; <----
  off_t offset;
#endif
  int last_ch;
};

And then 0-terminate just before the smh_call(SEMI_SYSLOG_WRITE0..) in
up_nputs.

The 0-termination needs be moved to syslograwstream_flush but I have not
tested this:

static int syslograwstream_flush(FAR struct lib_outstream_s *self)
{
<--snip-->
  stream->buffer[stream->offset] = 0;
  ssize_t nbytes = syslog_write(stream->buffer, stream->offset);