Hi Ron,
> I guess the address convention seems x8664 when looking at 0xffffffxxxxxxxx type sort of 64 bit virtual address.
arm64 also has a similar range of virtual addresses (see
"Documentation/arm64/memory.rst" in Linux),
currently my target is using 39-bits (as specified in crash command
used below) and 4 kB page table.
I see below address range being used, when giving "-d 1" to enable debug prints:
crash: get_cpus_present: present: 8
hypervisor: (undetermined)
ikconfig: 1616 valid configs.
SECTION_SIZE_BITS: 30
CONFIG_ARM64_VA_BITS: 39
VA_BITS_ACTUAL: 39
(calculated) VA_BITS: 39
PAGE_OFFSET: ffffff8000000000
VA_START: ffffffc000000000
modules: ffffffc008000000 - ffffffc00fffffff
vmalloc: ffffffc010000000 - fffffffebffeffff
kernel image: fffffff009680000 - fffffff00b194000
vmemmap: fffffffeffe00000 - ffffffffffffffff
Also ,There is no issue with crash (compiled for arm64) or vmlinux (arm64) type.
> Either that or possibly the offset at which you are trying to load.
Are you referring to kaslr offset? Without that in place, I get a
vmlinux/ramdump mismatch error.
So I am confident that it is correct.
Can anyone suggest whether any change is required in either crash utility or
RT Linux to make use of crash utility to analyze ramdump with RT Linux?
Regards,
Abhishek
On Thu, Jul 8, 2021 at 7:49 AM Ron HM <gpl.positron@xxxxxxxxx> wrote:
>
> Either that or possibly the offset at which you are trying to load.
>
> On Thu, 8 Jul 2021, 9:28 am Ron HM, <gpl.positron@xxxxxxxxx> wrote:
>>
>> Hi Abhishek,
>> I guess the address convention seems x8664 when looking at 0xffffffxxxxxxxx type sort of 64 bit virtual address.
>>
>> ------
>> crash: invalid kernel virtual address: fffffff791ff5a5f type: "64-bit KVADDR"
>> -----
>>
>> For arm64 bit the addressing would more be sort of 0xCCAbxxxxxxx sorts. Due to the convention of memory addressing start addresses.
>>
>> As a first check confirm if your crash and vmlinuz file is x8664 type
>> # file vmlinux
>> # file crash
>>
>>
>>
>>
>> On Wed, 7 Jul 2021, 3:53 pm Abhishek Shah, <abrs612@xxxxxxxxx> wrote:
>>>
>>> Hi All,
>>>
>>> I was wondering if there is any change required in either crash utility or
>>> RT Linux to make use of crash utility to analyze ramdump with RT Linux.
>>>
>>> I am using crash 7.3.0++ and Linux - 5.4.61-rt37 on arm64 target.
>>> I see the below error:
>>> ../crash DDR0.BIN@0x80000000,DDR1.BIN@0x100000000 vmlinux
>>> --machdep vabits_actual=39 --kaslr 0x2ff9600000
>>> ......
>>> crash: invalid kernel virtual address: fffffff791ff5a5f type: "64-bit KVADDR"
>>>
>>>
>>> Regards,
>>> Abhishek
>>>
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