On 5/12/07, Eric W. Biederman <[email protected]> wrote:
For data segments we never use that GDT, it is only for the code
segment we use the GDT and that only to get us into 64bit mode.
after the patch
linux:/home/yhlu/xx/xx/kernel/linux-2.6/arch/x86_64/boot/compressed #
readelf -e vmlinux
...
Section Headers:
[Nr] Name Type Address Offset
Size EntSize Flags Link Info Align
[ 0] NULL 0000000000000000 00000000
0000000000000000 0000000000000000 0 0 0
[ 1] .text PROGBITS 0000000000000000 00100000
000000000032617c 0000000000000000 AX 0 0 16
[ 2] .rodata PROGBITS 0000000000326180 00426180
0000000000000400 0000000000000000 A 0 0 32
[ 3] .eh_frame PROGBITS 0000000000326580 00426580
0000000000000210 0000000000000000 A 0 0 8
[ 4] .data PROGBITS 0000000000326790 00426790
0000000000000008 0000000000000000 WA 0 0 8
[ 5] .bss NOBITS 00000000003267a0 00426798
000000000000b860 0000000000000000 WA 0 0 32
[ 6] .comment PROGBITS 0000000000000000 00426798
0000000000000035 0000000000000000 0 0 1
[ 7] .shstrtab STRTAB 0000000000000000 004267cd
0000000000000047 0000000000000000 0 0 1
[ 8] .symtab SYMTAB 0000000000000000 00426a98
00000000000007c8 0000000000000018 9 60 8
[ 9] .strtab STRTAB 0000000000000000 00427260
0000000000000350 0000000000000000 0 0 1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings)
I (info), L (link order), G (group), x (unknown)
O (extra OS processing required) o (OS specific), p (processor specific)
after the patch, it seems .data section size still have 8 bytes.
before that will 0x28.
don't know what are the 8 bytes.
YH
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