arm64: page-align sections for DEBUG_RODATA
A kernel built with DEBUG_RO_DATA && !CONFIG_DEBUG_ALIGN_RODATA doesn't have .text aligned to a page boundary, though fixup_executable works at page-granularity thanks to its use of create_mapping. If .text is not page-aligned, the first page it exists in may be marked non-executable, leading to failures when an attempt is made to execute code in said page. This patch upgrades ALIGN_DEBUG_RO and ALIGN_DEBUG_RO_MIN to force page alignment for DEBUG_RO_DATA && !CONFIG_DEBUG_ALIGN_RODATA kernels, ensuring that all sections with specific RWX permission requirements are mapped with the correct permissions. Signed-off-by: NMark Rutland <mark.rutland@arm.com> Reported-by: NJeremy Linton <jeremy.linton@arm.com> Reviewed-by: NLaura Abbott <laura@labbott.name> Acked-by: NArd Biesheuvel <ard.biesheuvel@linaro.org> Cc: Suzuki Poulose <suzuki.poulose@arm.com> Cc: Will Deacon <will.deacon@arm.com> Fixes: da141706 ("arm64: add better page protections to arm64") Cc: <stable@vger.kernel.org> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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