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Currently cpu_memory_rw_debug() assumes page-granularity for translations, and it works in a loop where each iteration translates for the vaddr rounded down to a page boundary and then copies up to the end of the page boundary. Rewrite it to use the new cpu_translate_for_debug(): we no longer want to round down the input address, and the boundary we copy up to is now determined by the lg_page_size it returns rather than being assumed to be page-sized. This, together with the implementation of translate_for_debug for Arm targets, fixes the bug where semihosting would incorrectly fail to access parameter blocks that were in memory where the start of the 4K region they were in was inaccessible due to MPU region settings, even if the parameter block itself was readable. Resolves: https://gitlab.com/qemu-project/qemu/-/work_items/3292 Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20260417173105.1648172-18-peter.maydell@linaro.org Acked-by: Peter Xu <peterx@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-ID: <20260430093810.2762539-19-peter.maydell@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>