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authorJean-Philippe Brucker <jean-philippe@linaro.org>2021-07-21 09:18:35 +0200
committerWill Deacon <will@kernel.org>2021-07-21 11:23:25 +0100
commita7c3acca53801e10a77ede6b759a73f5ac4bc261 (patch)
treeaa6739e676233664393b106c706c111b86ff3751 /arch/arm64/include/asm/syscall.h
parente6f85cbeb23bd74b8966cf1f15bf7d01399ff625 (diff)
downloadlinux-a7c3acca53801e10a77ede6b759a73f5ac4bc261.tar.bz2
arm64: smccc: Save lr before calling __arm_smccc_sve_check()
Commit cfa7ff959a78 ("arm64: smccc: Support SMCCC v1.3 SVE register saving hint") added a call to __arm_smccc_sve_check() which clobbers the lr (register x30), causing __arm_smccc_hvc() to return to itself and crash. Save lr on the stack before calling __arm_smccc_sve_check(). Save the frame pointer (x29) to complete the frame record, and adjust the offsets used to access stack parameters. Acked-by: Ard Biesheuvel <ardb@kernel.org> Acked-by: Mark Brown <broonie@kernel.org> Fixes: cfa7ff959a78 ("arm64: smccc: Support SMCCC v1.3 SVE register saving hint") Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org> Link: https://lore.kernel.org/r/20210721071834.69130-1-jean-philippe@linaro.org Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/include/asm/syscall.h')
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