On 07/24/2017 01:42 AM, Felix Fietkau wrote:
On 2017-07-21 18:53, Alexandru Gagniuc wrote:
Hello,
I am looking to write some rules to generate images on an SOC we're
trying to port over.
I need a vmlinux-initramfs ELF file with DWARF debugging information.
This is useful because it goes straight to gdb and can be loaded over
JTAG. I can write the following rule:
[snip]
I'm assuming that's not how the buildsystem was designed. Is there any
sensible way of putting these rules together into a single 'define Device/'?
I think the most sensible way would be to change the kernel to support
load_addr == entry_point. This could be achieved by adding a small
assembly stub that gets linked to the beginning of the kernel image
which jumps to the real entry entry point.
Some other architectures, e.g. MIPS, have been doing this for a long
time. Is it feasible on ARC as well?
I'm not aware of any technical reason as to why it can't be done. I do
not know why the linker sections are arranged the way they are. My guess
is the decision was fairly arbitrary. At the same time, I don't get to
make those decisions.
I understand from your answer that there is no way to have the LEDE
buildsystem generate the correct images without changing the kernel
entry point, right?
Alex
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