This is the mail archive of the libc-hacker@sourceware.org mailing list for the glibc project.
Note that libc-hacker is a closed list. You may look at the archives of this list, but subscription and posting are not open.
| Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
|---|---|---|
| Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |
| Other format: | [Raw text] | |
From: Roland McGrath <roland@redhat.com>
Date: Wed, 1 Mar 2006 20:41:54 -0800 (PST)
> > This turns out to be the .tdata section.
> >
> > LOAD off 0x0014e478 vaddr 0x0015e478 paddr 0x0015e478 align 2**16
> > filesz 0x00004984 memsz 0x00007268 flags rwx
> > ...
> > 17 .tdata 00000008 0015e478 0015e478 0014e478 2**2
> > CONTENTS, ALLOC, LOAD, DATA, THREAD_LOCAL
> >
> > Probably some binutils issue?
>
> That should be PT_TLS, not PT_LOAD.
Even with current binutils, it's still there, but then I noticed
this (this is for libc.so):
Program Header:
PHDR off 0x00000034 vaddr 0x00000034 paddr 0x00000034 align 2**2
filesz 0x00000140 memsz 0x00000140 flags r-x
INTERP off 0x00149428 vaddr 0x00149428 paddr 0x00149428 align 2**3
filesz 0x00000018 memsz 0x00000018 flags r--
LOAD off 0x00000000 vaddr 0x00000000 paddr 0x00000000 align 2**16
filesz 0x0014e015 memsz 0x0014e015 flags r-x
LOAD off 0x0014e478 vaddr 0x0015e478 paddr 0x0015e478 align 2**16
filesz 0x00004984 memsz 0x00007268 flags rwx
DYNAMIC off 0x0014ff18 vaddr 0x0015ff18 paddr 0x0015ff18 align 2**2
filesz 0x000000e8 memsz 0x000000e8 flags rw-
NOTE off 0x00000174 vaddr 0x00000174 paddr 0x00000174 align 2**2
filesz 0x00000020 memsz 0x00000020 flags r--
TLS off 0x0014e478 vaddr 0x0015e478 paddr 0x0015e478 align 2**2
filesz 0x00000008 memsz 0x0000002c flags r--
EH_FRAME off 0x00149440 vaddr 0x00149440 paddr 0x00149440 align 2**2
filesz 0x000010c4 memsz 0x000010c4 flags r--
STACK off 0x00000000 vaddr 0x00000000 paddr 0x00000000 align 2**2
filesz 0x00000000 memsz 0x00000000 flags rw-
RELRO off 0x0014e478 vaddr 0x0015e478 paddr 0x0015e478 align 2**0
filesz 0x00001b88 memsz 0x00001b88 flags r-x
Note the second LOAD and the one TLS are at the same location, same
off and vaddr, yet different alignment, different filesz and different
memsz.
RELRO is at the same offset too, again different filesz and memsz.
17 .tdata 00000008 0015e478 0015e478 0014e478 2**2
CONTENTS, ALLOC, LOAD, DATA, THREAD_LOCAL
18 .tbss 00000024 0015e480 0015e480 0014e480 2**2
ALLOC, THREAD_LOCAL
19 .fini_array 00000004 0015e480 0015e480 0014e480 2**2
CONTENTS, ALLOC, LOAD, DATA
20 .ctors 0000000c 0015e484 0015e484 0014e484 2**2
CONTENTS, ALLOC, LOAD, DATA
21 .dtors 00000008 0015e490 0015e490 0014e490 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
22 __libc_subfreeres 00000054 0015e498 0015e498 0014e498 2**2
CONTENTS, ALLOC, LOAD, DATA
23 __libc_atexit 00000004 0015e4ec 0015e4ec 0014e4ec 2**2
CONTENTS, ALLOC, LOAD, DATA
24 __libc_thread_subfreeres 00000008 0015e4f0 0015e4f0 0014e4f0 2**2
CONTENTS, ALLOC, LOAD, DATA
25 .data.rel.ro 00001a20 0015e4f8 0015e4f8 0014e4f8 2**2
CONTENTS, ALLOC, LOAD, DATA
26 .dynamic 000000e8 0015ff18 0015ff18 0014ff18 2**2
CONTENTS, ALLOC, LOAD, DATA
27 .got 000023d8 00160000 00160000 00150000 2**2
CONTENTS, ALLOC, LOAD, DATA
28 .plt 00000124 001623d8 001623d8 001523d8 2**2
CONTENTS, ALLOC, LOAD, CODE
29 .data 000008fc 00162500 00162500 00152500 2**3
CONTENTS, ALLOC, LOAD, DATA
30 .bss 000028e0 00162e00 00162e00 00152dfc 2**3
ALLOC
Hmmm...
Part of the big LOAD segment is the .plt, which does need to be
executable and writable.
| Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
|---|---|---|
| Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |