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ANDROID: arm64: add __nocfi to functions that jump to a physical address

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Disable CFI checking for functions that switch to linear mapping and
make an indirect call to a physical address, since the compiler only
understands virtual addresses.

Bug: 145210207
Change-Id: I2bd39c5891d4f2ce033e5ee515cf86d96eb0447f
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
This commit is contained in:
Sami Tolvanen
2017-08-18 14:31:23 -07:00
committed by Alistair Delva
parent 429733db42
commit 58f2ba8ac1
3 changed files with 6 additions and 6 deletions
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2
arch/arm64/kernel/cpufeature.c
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@@ -1398,7 +1398,7 @@ static bool unmap_kernel_at_el0(const struct arm64_cpu_capabilities *entry,
}
#ifdef CONFIG_UNMAP_KERNEL_AT_EL0
static void
static void __nocfi
kpti_install_ng_mappings(const struct arm64_cpu_capabilities *__unused)
{
typedef void (kpti_remap_fn)(int, int, phys_addr_t);