Re: [PATCH] semihosting/arm-compat: Have TARGET_SYS_EXIT[_EXTENDED] return signed

[Richard Henderson]

On 10/4/23 23:26, Philippe Mathieu-Daudé wrote:
> Per the "Semihosting for AArch32 and AArch64" spec. v2 (2023Q3) [*]:
>
>    6.5   SYS_EXIT (0x18)
>    6.5.2   Entry (64-bit)
>
>      On entry, the PARAMETER REGISTER contains a pointer to
>      a two-field argument block:
>
>      . field 1
>        The exception type, which is one of the set of reason
>        codes in the above tables.
>
>      . field 2
>        A subcode, whose meaning depends on the reason code in
>        field 1.
>
>      In particular, if field 1 is ADP_Stopped_ApplicationExit
>      then field 2 is an exit status code, as passed to the C
>      standard library exit() function. [...]
>
> Having libc exit() is declared as:
>
>    LIBRARY
>         Standard C Library (libc, -lc)
>
>    SYNOPSIS
>
>         void
>         exit(int status);
>
> the status is expected to be signed.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>


r~