[Bug gold/16788] Gold produces unbootable Linux kernel

[ccoutant at google dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=16788

--- Comment #8 from Cary Coutant <ccoutant at google dot com> ---
> -ffffffff8100021e:      48 c7 c7 10 e7 75 81    mov   
> $0xffffffff8175e710,%rdi
> +ffffffff8100021e:      48 c7 c7 c8 cf 78 81    mov   
> $0xffffffff8178cfc8,%rdi

> -ffffffff810002cc:      48 c7 c7 3a e6 75 81    mov   
> $0xffffffff8175e63a,%rdi
> +ffffffff810002cc:      48 c7 c7 6c e6 75 81    mov   
> $0xffffffff8175e66c,%rdi

Differences like these could be the problem, but it's more likely that these
just reflect slight differences in layout between the two linkers (the operand
addresses are in .rodata).

I'm not sure why gold is bumping the text segment up to offset 0x20000 in the
file, though; it may have something to do with the way we handle ALIGN in the
script. Theoretically, the virtual addresses are the same in both files, so the
results should be equivalent, but it's possible that the kernel really depends
on it starting at 0x1000.

-cary

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