Messages in this thread | | | Date | Thu, 13 Dec 2018 18:13:18 +0000 | From | Will Deacon <> | Subject | Re: [PATCH] arm64: kaslr: print PHYS_OFFSET in dump_kernel_offset() |
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[+Ard because I'll basically go with his preference on this one]
On Wed, Dec 12, 2018 at 06:56:49PM +0800, Miles Chen wrote: > When debug with kaslr, it is sometimes necessary to have PHYS_OFFSET to > perform linear virtual address to physical address translation. > Sometimes we're debugging with only few information such as a kernel log > and a symbol file, print PHYS_OFFSET in dump_kernel_offset() for that case. > > Tested by: > echo c > /proc/sysrq-trigger > [ 11.996161] SMP: stopping secondary CPUs > [ 11.996732] Kernel Offset: 0x2522200000 from 0xffffff8008000000 > [ 11.996881] PHYS_OFFSET: 0xffffffeb40000000 > > Signed-off-by: Miles Chen <miles.chen@mediatek.com> > Tested-by: Miles Chen <miles.chen@mediatek.com> > --- > arch/arm64/kernel/setup.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c > index f4fc1e0544b7..4b0e1231625c 100644 > --- a/arch/arm64/kernel/setup.c > +++ b/arch/arm64/kernel/setup.c > @@ -388,6 +388,7 @@ static int dump_kernel_offset(struct notifier_block *self, unsigned long v, > if (IS_ENABLED(CONFIG_RANDOMIZE_BASE) && offset > 0) { > pr_emerg("Kernel Offset: 0x%lx from 0x%lx\n", > offset, KIMAGE_VADDR); > + pr_emerg("PHYS_OFFSET: 0x%llx\n", PHYS_OFFSET); > } else { > pr_emerg("Kernel Offset: disabled\n"); > } > -- > 2.18.0 >
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