On Sat, 21 May 2022 at 01:04, Richard Henderson
<richard.hender...@linaro.org> wrote:
>
> Do not store 'err' into errno only to read it back immediately.
> Use 'ret' for the return value, not 'reg0'.
>
> Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
> ---
> semihosting/arm-compat-semi.c | 19 ++++++++++---------
> 1 file changed, 10 insertions(+), 9 deletions(-)
>
> diff --git a/semihosting/arm-compat-semi.c b/semihosting/arm-compat-semi.c
> index c6bfd4d1ba..b00ed2c6d1 100644
> --- a/semihosting/arm-compat-semi.c
> +++ b/semihosting/arm-compat-semi.c
> @@ -290,28 +290,29 @@ static target_ulong common_semi_syscall_len;
>
> static void common_semi_cb(CPUState *cs, target_ulong ret, target_ulong err)
> {
> - target_ulong reg0 = common_semi_arg(cs, 0);
> -
> if (ret == (target_ulong)-1) {
> - errno = err;
> - set_swi_errno(cs, -1);
> - reg0 = ret;
> +#ifdef CONFIG_USER_ONLY
> + TaskState *ts = cs->opaque;
> + ts->swi_errno = err;
> +#else
> + syscall_err = err;
> +#endif
> } else {
> /* Fixup syscalls that use nonstardard return conventions. */
> + target_ulong reg0 = common_semi_arg(cs, 0);
This should be "ret = ", right? (Otherwise I think this fails to
compile. I assume that some later patch has this fix in it.)
Otherwise
Reviewed-by: Peter Maydell <peter.mayd...@linaro.org>
thanks
-- PMM
