`.boot` section is flagged as writeable

[japaric]

The .boot section contains the multiboot header.

$ readelf -hS target/x86_64/release/kernel
  [ 1] .boot             PROGBITS         0000000000100000  000000b0
       0000000000000018  0000000000000000  WA       0     0     1

Unsure how bad this really is, but it seems to be affecting the output of the size command:

$ size target/x86_64/release/kernel
   text    data     bss     dec     hex filename
    132      24       0     156      9c target/x86_64/release/kernel

size is classifying the .boot section as "data" when it should be classified as "text".

[japaric]

Possible solution: Place the multiboot header section under .text. This fixes the output of size but the multiheader section would then be flagged as executable, which is not true.

[steveklabnik]

This just might be me being a noob.

[japaric]

@steveklabnik Nah, this is a problem with my implementation, which creates the multiboot header in the linker script. The intermezzos implementation doesn't have this problem:

$ size build/kernel.bin
   text    data     bss     dec     hex filename
    142       0       0     142      8e build/kernel.bin