Re: [Qemu-devel] [PATCH v1 05/23] semihosting: enable chardev backed output

[Peter Maydell <peter.maydell@linaro.org>]

On Thu, 9 May 2019 at 17:59, Alex Bennée <alex.bennee@linaro.org> wrote:
>
> For running system tests we want to be able to re-direct output to a
> file like we do with serial output. This does the wiring to allow us
> to treat semihosting like just another character output device.
>
> diff --git a/qemu-options.hx b/qemu-options.hx
> index 51802cbb266..6aa3a08c2fb 100644
> --- a/qemu-options.hx
> +++ b/qemu-options.hx
> @@ -3975,12 +3975,12 @@ STEXI
>  Enable semihosting mode (ARM, M68K, Xtensa, MIPS, Nios II only).
>  ETEXI
>  DEF("semihosting-config", HAS_ARG, QEMU_OPTION_semihosting_config,
> -    "-semihosting-config [enable=on|off][,target=native|gdb|auto][,arg=str[,...]]\n" \
> +    "-semihosting-config [enable=on|off][,target=native|gdb|auto][,chardev=id][,arg=str[,...]]\n" \
>      "                semihosting configuration\n",
>  QEMU_ARCH_ARM | QEMU_ARCH_M68K | QEMU_ARCH_XTENSA | QEMU_ARCH_LM32 |
>  QEMU_ARCH_MIPS | QEMU_ARCH_NIOS2)

As you can see in the docs here, semihosting is supported on
five guest architectures, so we should implement this new
feature for all of them, not just arm.

thanks
-- PMM