[question] Can we get both phys value on Mediatek device without root using vendor_boot? #313

I have bad communication skills, so sorry if there is anything lacking 😅

docs/kernel_profiles/MEDIATEK.md says kernel_phys_load and
kernel_phys_offset "cannot be obtained from the image" and requires a
rooted shell reading /proc/iomem + /proc/kallsyms via tools/mtk-phys/.

That's correct, Different from Snapdragon where the equivalent physical-address info
lives in xbl_config.img and has its own (different) extraction story. But
on MediaTek specifically, vendor_boot.img's header already carries the
value needed: the kernel_addr field (what calls --base +
--kernel_offset) turned out to equal the real physical load address on
every MTK device I checked

I have created a tool that extracts the phys value from the vendor_boot partition.

Here for screenshoot:

So, I assume that MTK kernels typically have a text_offset of 0 (meaning _text is placed exactly at the RAM base, without the additional 0x80000 offset)—and the kernel_phys_offset (DRAM base) can vary by device; it isn't limited to just 0x40000000 or 0x80000000. The suffix values can be 80000 (or 800 for 32 bit devices) or 00000.

However, this is still my assumption and this tool has not been tested on other Mediatek devices. It needs to be tested on other Mediatek devices.

@NickJi2019