Remove BYTE directives from kernel linker script to fix triple fault on boot

[48ca]

When compiling with binutils version >=2.33, xv6 will triple fault on boot. Although this may be a regression in binutils, this PR will prevent the triple fault.

For binutils >=2.33, the BYTE directives produce an incorrect physical address for the second LOAD memory segment in the ELF header of kernel. This can be observed with objdump -x kernel after compiling. I'm not sure why this happens; there may be other ways to fix the problem.

This bug was noticed because this version of xv6 is used for a course at the University of Virginia.

[mk6502]

Thanks for this. Confirming it solved the problem on Ubuntu 19.10.

[nwolovick]

Confirm this solves the problem on an up-to-date Debian testing.

[YibaiMeng]

Confirm this also solves the problem on x86_64 Ubuntu 19.10.

[Hertz1239]

Confirm this works on x86_64 ubuntu 19.10

[Omarfos]

Confirm this works on mac os Catalina

[karthik1107]

It isn't working in kali linux

[ghost]

works on ubuntu 19.10, thanks!

[t812206236]

Thank you very much, this works fine under mac, the compilation tool is homebrew (x86_64-elf-gcc 9.3.0 and qemu 4.2.0)

[cneally]

Works on Ubuntu 20.04, Thanks

[hadeutscher]

Solves the issue on Ubuntu 20.04

[binarytom]

thanks a lot, it works on my ubuntu 20.04.

[coded7861]

Thanks for the fix. Works on Ubuntu 20.04.

[grzkv]

Thanks! Solves the issue for me on Ubuntu 19.10.

[Lotus-95]

Thx. It works on Ubuntu 20.04.

[cheng3100]

Ubuntu 20.04 confirm ok. By the way I check the result of objdump -x kernel , right is fix, left is wrong version. I found that the LMA is wrong since the .stab sections, It is in fact the VMA because it beyonds 0x8000000. Does anyone have thoughts of the cause about the problem?

[tglanz]

solves the issue on x86_64 Linux 5.9.1-arch-1

[austintraver]

Solves the issue on macOS 11.0 Big Sur

[ghost]

Thanks. Solved the issue for me as well. well done.

[ceciivanov]

hello I need help on commiting with this request, I tried in terminal git and it says there is not such file in git... any help?

[zhongyoub]

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