On Wed, Oct 21, 2015 at 10:38:10 -0700, H.J. Lu wrote:
> On Wed, Oct 21, 2015 at 10:33 AM, Ilya Verbin <iver...@gmail.com> wrote:
> > H.J.,
> > Maybe linker should print some warning about joining writable + nonwritable
> > sections? Here is a simple testcase:
> >
> > $ cat t1.s
> > .section ".AAA", "a"
> > .long 0x12345678
> > $ cat t2.s
> > .section ".AAA", "wa"
> > .long 0x12345678
> > $ as t1.s -o t1.o
> > $ as t2.s -o t2.o
> > $ ld -shared t1.o t2.o
> > $ ls -lh a.out
> > 2.1M a.out
> >
>
> Does linker make AAA writable? If yes, linker does what it
> is told.
Yes, it makes it writable, but why it also makes this?
[Nr] Name Type Address Offset
Size EntSize Flags Link Info Align
[ 0] NULL 0000000000000000 00000000
0000000000000000 0000000000000000 0 0 0
[ 1] .hash HASH 00000000000000b0 000000b0
0000000000000028 0000000000000004 A 2 0 8
[ 2] .dynsym DYNSYM 00000000000000d8 000000d8
0000000000000078 0000000000000018 A 3 2 8
[ 3] .dynstr STRTAB 0000000000000150 00000150
0000000000000019 0000000000000000 A 0 0 1
[ 4] .AAA PROGBITS 0000000000000169 00000169
0000000000000008 0000000000000000 WA 0 0 1
[ 5] .eh_frame PROGBITS 0000000000000178 00000178
0000000000000000 0000000000000000 A 0 0 8
[ 6] .dynamic DYNAMIC 0000000000200178 00200178 <-- ???
00000000000000b0 0000000000000010 WA 3 0 8
[ 7] .shstrtab STRTAB 0000000000000000 00200380
0000000000000049 0000000000000000 0 0 1
[ 8] .symtab SYMTAB 0000000000000000 00200228
0000000000000120 0000000000000018 9 9 8
[ 9] .strtab STRTAB 0000000000000000 00200348
0000000000000038 0000000000000000 0 0 1
-- Ilya
