Re: [Qemu-devel] [PATCH 1/7] target/sparc: Factor out the body of sparc_cpu_unassigned_access()

[Richard Henderson <richard.henderson@linaro.org>]

On 8/1/19 11:30 AM, Peter Maydell wrote:
> Currently the SPARC target uses the old-style do_unassigned_access
> hook.  We want to switch it over to do_transaction_failed, but to do
> this we must first remove all the direct calls in ldst_helper.c to
> cpu_unassigned_access().  Factor out the body of the hook function's
> code into a new sparc_raise_mmu_fault() and call it from the hook and
> from the various places that used to call cpu_unassigned_access().
> 
> In passing, this fixes a bug where the code that raised the
> MMU exception was directly calling GETPC() from a function that
> was several levels deep in the callstack from the original
> helper function: the new sparc_raise_mmu_fault() instead takes
> the return address as an argument.
> 
> Other than the use of retaddr rather than GETPC() and a comment
> format fixup, the body of the new function has no changes from
> that of the old hook function.
> 
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
> ---
>  target/sparc/ldst_helper.c | 201 +++++++++++++++++++------------------
>  1 file changed, 106 insertions(+), 95 deletions(-)

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


r~