On Mon, 5 Apr 2010, Richard Henderson wrote:
> To be used by userspace emulation to verify that the memory
> range defined by [start, start+len) is valid for the guest,
> taking into account TARGET_VIRT_ADDR_SPACE_BITS.
>
> Signed-off-by: Richard Henderson <r...@twiddle.net>
> ---
> cpu-all.h | 10 ++++++++++
> 1 files changed, 10 insertions(+), 0 deletions(-)
>
> diff --git a/cpu-all.h b/cpu-all.h
> index 927445c..7d31b16 100644
> --- a/cpu-all.h
> +++ b/cpu-all.h
> @@ -637,11 +637,21 @@ extern int have_guest_base;
>
> #if HOST_LONG_BITS <= TARGET_VIRT_ADDR_SPACE_BITS
> #define h2g_valid(x) 1
> +#define guest_start_len_valid(s,l) ({ \
> + unsigned long __s = (unsigned long)(s); \
> + unsigned long __e = __s + (l) - 1; \
> + __e >= __s; \
> +})
> #else
> #define h2g_valid(x) ({ \
> unsigned long __guest = (unsigned long)(x) - GUEST_BASE; \
> __guest < (1ul << TARGET_VIRT_ADDR_SPACE_BITS); \
> })
> +#define guest_start_len_valid(s,l) ({ \
> + unsigned long __s = (unsigned long)(s); \
> + unsigned long __e = __s + (l) - 1; \
> + __e >= __s && __e < (1ul << TARGET_VIRT_ADDR_SPACE_BITS); \
> +})
> #endif
Please do not use double leading underscore.
>
> #define h2g(x) ({ \
>
--
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