kernel.ld is not working correctly

[HHHHao-s]

kernel.ld is not working correctly. If I adjust the order of OBJS in Makefile and place $K/entry.o at the end, the _start function does not appear at the address 0x80000000. I suspect that the linker places functions according to the order in which it receives the files, I don't know if you are using such feature, but it seems better to place the function explicitly.And I will open a pr in order to fix it.

[schmitts]

Hi!

I was also coming across that issue while adding cmake for compiling xv6. I've added an assert:

https://github.com/xv6-guide/xv6-riscv/blob/aaadc2479a13eae5d405980f5e0f48bb6330354d/kernel/kernel.ld#L46

and a comment that entry must be given first:

https://github.com/xv6-guide/xv6-riscv/blob/aaadc2479a13eae5d405980f5e0f48bb6330354d/CMakeLists.txt#L104

I will try your much nicer solution asap.

Cheers, Sebastian