On 17 November 2014 12:32, Peter Maydell <peter.mayd...@linaro.org> wrote:
> This (the extra command line option to specify where semihosting
> should go) is definitely a feature we should add. I think it's
> possible to make use of the QemuOpts infrastructure to support
> -semihosting # current option name with existing semantics
> -semihosting target=gdb
> -semihosting target=native
> -semihosting target=auto # same as plain "-semihosting"
...and then my mail client sent that mail half-composed. The
missing fragment:
> something like (untested):
> static QemuOptsList qemu_semihosting_opts = {
> .name = "semihosting",
> .implied_opt_name = "enable",
> .head = QTAILQ_HEAD_INITIALIZER(qemu_semihosting_opts.head),
> .desc = {
> {
> .name = "enable",
> .type = QEMU_OPT_BOOL,
> },{
> .name = "target",
> .type = QEMU_OPT_STRING,
> }
> { /* end of list */ }
> },
> };
[and if you don't specify target then we default to 'auto'.]
Compare the handling of 'rtc' and similar options: you get
to have an "implied option name" so "-foo" is treated like
"-foo enable=true", which gives us backwards compatibility
with our existing option, and a syntax for specifying the
target that fits in with the other command line options we
already have.
thanks
-- PMM
