On Fri, Jun 04, 2010 at 12:14:14PM -0700, Richard Henderson wrote:
> This allows the use of direct calls to the helpers,
> and a direct branch back to the epilogue.
>
> Signed-off-by: Richard Henderson <r...@twiddle.net>
> ---
> exec.c | 7 +++++++
> 1 files changed, 7 insertions(+), 0 deletions(-)
>
> diff --git a/exec.c b/exec.c
> index bb3dcad..7bbfe60 100644
> --- a/exec.c
> +++ b/exec.c
> @@ -519,6 +519,13 @@ static void code_gen_alloc(unsigned long tb_size)
> start = (void *) 0x01000000UL;
> if (code_gen_buffer_size > 16 * 1024 * 1024)
> code_gen_buffer_size = 16 * 1024 * 1024;
> +#elif defined(__s390x__)
> + /* Map the buffer so that we can use direct calls and branches. */
> + /* We have a +- 4GB range on the branches; leave some slop. */
> + if (code_gen_buffer_size > (3ul * 1024 * 1024 * 1024)) {
> + code_gen_buffer_size = 3ul * 1024 * 1024 * 1024;
> + }
> + start = (void *)0x90000000UL;
Is there any reason for this address?
> #endif
> code_gen_buffer = mmap(start, code_gen_buffer_size,
> PROT_WRITE | PROT_READ | PROT_EXEC,
> --
> 1.7.0.1
>
>
>
--
Aurelien Jarno GPG: 1024D/F1BCDB73
aurel...@aurel32.net http://www.aurel32.net
