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authorPeter Maydell <peter.maydell@linaro.org>2018-06-26 17:50:41 +0100
committerPeter Maydell <peter.maydell@linaro.org>2018-06-26 17:50:41 +0100
commite5e40999b5e03567ef654546e3d448431643f8f3 (patch)
tree6a21df55ce3a5ee1f2cbf78e60c2f3840f21e2c7 /fpu
parent55df6fcf5476b44bc1b95554e686ab3e91d725c5 (diff)
target/arm: Set page (region) size in get_phys_addr_pmsav7()
We want to handle small MPU region sizes for ARMv7M. To do this, make get_phys_addr_pmsav7() set the page size to the region size if it is less that TARGET_PAGE_SIZE, rather than working only in TARGET_PAGE_SIZE chunks. Since the core TCG code con't handle execution from small MPU regions, we strip the exec permission from them so that any execution attempts will cause an MPU exception, rather than allowing it to end up with a cpu_abort() in get_page_addr_code(). (The previous code's intention was to make any small page be treated as having no permissions, but unfortunately errors in the implementation meant that it didn't behave that way. It's possible that some binaries using small regions were accidentally working with our old behaviour and won't now.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20180620130619.11362-3-peter.maydell@linaro.org
Diffstat (limited to 'fpu')
0 files changed, 0 insertions, 0 deletions