From: Petr Hracek <phracek@redhat.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 20614@debbugs.gnu.org
Subject: bug#20614: Segmentation fault when building on Power8 Little Endian
Date: Mon, 5 Oct 2015 09:40:15 +0200 [thread overview]
Message-ID: <5612295F.4000607@redhat.com> (raw)
In-Reply-To: <83wpv55qog.fsf@gnu.org>
On 10/02/2015 03:46 PM, Eli Zaretskii wrote:
>> Cc: 20614@debbugs.gnu.org
>> From: Petr Hracek <phracek@redhat.com>
>> Date: Fri, 2 Oct 2015 14:58:56 +0200
>>
>> On 10/02/2015 10:49 AM, Eli Zaretskii wrote:
>>>> Cc: 20614@debbugs.gnu.org
>>>> From: Petr Hracek <phracek@redhat.com>
>>>> Date: Fri, 2 Oct 2015 10:36:27 +0200
>>>>
>>>> What does this GDB command display in frame #1:
>>>>
>>>> (gdb) p old_section_names + NEW_SECTION_H (nn).sh_name
>>>>
>>>> ?
>>>>
>>>> It is a really strange.
>>>> in our unexelf.c is NEW_SECTION_H defined as
>>>>
>>>> #define NEW_SECTION_H(n) \
>>>> (*(ElfW (Shdr) *) ((byte *) new_section_h + new_file_h->e_shentsize * (n)))
>>>>
>>>> Paul Eggert did a some patch 1 or 2 year ago and modify it to
>>>> #define NEW_SECTION_H(n) \
>>>> (*(ElfW (Shdr) *) entry_address (new_section_h, n, new_file_h->e_shentsize))
>>>>
>>>> (gdb) frame 1
>>>> #1 0x00000000102e3724 in unexec (new_name=0x116387e8
>>>> "/home/phracek/rpmbuild/BUILD/emacs-24.3/src/emacs", old_name=0x11638838
>>>> "/home/phracek/rpmbuild/BUILD/emacs-24.3/src/temacs")
>>>> at unexelf.c:1258
>>>> 1258 if (!strcmp (old_section_names + NEW_SECTION_H (nn).sh_name, ".data")
>>>> (gdb) p old_section_names
>>>> $1 = 0x3fffab1dbfcc ""
>>>> (gdb) p old_section_names + NEW_SECTION_H (nn).sh_name
>>>> No symbol "NEW_SECTION_H" in current context.
>>> Use the expansion of that macro instead to display the value.
>> How to use the expansion.
> Just type it by hand:
>
> (gdb) p old_section_names + (*(ElfW (Shdr) *) ((byte *) new_section_h + new_file_h->e_shentsize * (nn)))
>
>> Are you connected on freenode #emacs.
> No.
First of all thank you for your time.
Well,
(gdb) p (*(ElfW (Shdr) *) ((byte *) new_section_h +
new_file_h->e_shentsize * (nn)))
No symbol "ElfW" in current context.
(gdb)
Also ElfBitsW does not exists.
(gdb) p ElfBitsW
No symbol "ElfBitsW" in current context.
(gdb)
I tried to find out what could be used from elf.h header file
but no any idea.
I guess that ELFSIZE should be defined from unexec.h, right?
http://git.savannah.gnu.org/cgit/emacs.git/tree/src/unexelf.c?h=emacs-24#n513
(gdb) p ELFSIZE
No symbol "ELFSIZE" in current context.
(gdb)
(gdb) frame 1
#1 0x00000000102e4174 in unexec (new_name=0x115c2868
"/home/phracek/rpmbuild/BUILD/emacs-24.3/src/emacs", old_name=0x115c28b8
"/home/phracek/rpmbuild/BUILD/emacs-24.3/src/temacs")
at unexelf.c:1257
1257 if (!strcmp (old_section_names + NEW_SECTION_H
(nn).sh_name, ".data")
(gdb) i locals
section = {sh_name = 122, sh_type = 4, sh_flags = 2, sh_addr =
268483520, sh_offset = 48064, sh_size = 768, sh_link = 5, sh_info = 0,
sh_addralign = 8, sh_entsize = 24}
new_file = 10
old_file = 9
new_file_size = 30325149
new_break = 0x11690000
old_base = 0x3fffaa7a0000 "\177ELF\002\001\001"
new_base = 0x3fffa8ab0000 "\177ELF\002\001\001"
old_file_h = 0x3fffaa7a0000
new_file_h = 0x3fffa8ab0000
old_program_h = 0x3fffaa7a0040
new_program_h = 0x3fffa8ab0040
old_section_h = 0x3fffab17a798
new_section_h = 0x3fffaa72a798
old_section_names = 0x3fffab17a657 ""
old_bss_addr = 272564224
new_bss_addr = 292093952
old_bss_size = 563096
new_data2_size = 19529728
new_data2_offset = 4063232
new_data2_addr = 272564224
old_bss_offset = 4063232
new_data2_incr = 19529728
n = 9
nn = 0
old_bss_index = 22
old_sbss_index = -1
old_plt_index = 20
old_data_index = 21
new_data2_index = 20
stat_buf = {st_dev = 2050, st_ino = 5119868, st_nlink = 1, st_mode =
33261, st_uid = 20582, st_gid = 20582, __pad2 = 0, st_rdev = 0, st_size
= 10795357, st_blksize = 4096,
st_blocks = 20976, st_atim = {tv_sec = 1444028953, tv_nsec =
509013261}, st_mtim = {tv_sec = 1444028953, tv_nsec = 379013248},
st_ctim = {tv_sec = 1444028953, tv_nsec = 379013248},
__unused4 = 0, __unused5 = 0, __unused6 = 0}
old_file_size = 10795357
(gdb)
It seems like some compilation directives are missing. But of course I
am guessing.
Local exec file:
`/home/phracek/rpmbuild/BUILD/emacs-24.3/src/temacs', file type
elf64-powerpcle.
Entry point: 0x10016100
0x0000000010000238 - 0x0000000010000249 is .interp
0x000000001000024c - 0x000000001000026c is .note.ABI-tag
0x000000001000026c - 0x0000000010000290 is .note.gnu.build-id
0x0000000010000290 - 0x000000001000036c is .gnu.hash
0x0000000010000370 - 0x0000000010006790 is .dynsym
0x0000000010006790 - 0x000000001000b204 is .dynstr
0x000000001000b204 - 0x000000001000ba5c is .gnu.version
0x000000001000ba60 - 0x000000001000bbc0 is .gnu.version_r
0x000000001000bbc0 - 0x000000001000bec0 is .rela.toc
0x000000001000bec0 - 0x0000000010011ff8 is .rela.plt
0x0000000010012000 - 0x000000001001204c is .init
0x0000000010012060 - 0x000000001037d398 is .text
0x000000001037d398 - 0x000000001037d3bc is .fini
0x000000001037d3c0 - 0x00000000103a08e2 is .rodata
0x00000000103a08e4 - 0x00000000103a9178 is .eh_frame_hdr
0x00000000103a9178 - 0x00000000103d0258 is .eh_frame
0x00000000103ef100 - 0x00000000103ef530 is .data.rel.ro
0x00000000103ef530 - 0x00000000103ef970 is .dynamic
0x00000000103ef970 - 0x00000000103f0000 is .got
0x00000000103f0000 - 0x00000000103f2078 is .plt
0x00000000103f2078 - 0x00000000106b91b8 is .data
0x00000000106b91c0 - 0x00000000107408e0 is .bss
0x00003fffb7fb0200 - 0x00003fffb7fb0224 is .note.gnu.build-id in
/lib64/ld64.so.2
0x00003fffb7fb0228 - 0x00003fffb7fb02e4 is .hash in /lib64/ld64.so.2
--
Petr Hracek
Software Engineer
Developer Experience
Red Hat, Inc
Mob: +420777056169
email: phracek@redhat.com
next prev parent reply other threads:[~2015-10-05 7:40 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-20 7:56 bug#20614: Segmentation fault when building on Power8 Little Endian Petr Hracek
2015-05-20 14:45 ` Eli Zaretskii
2015-05-20 16:12 ` Glenn Morris
2015-05-21 12:55 ` Petr Hracek
2015-07-13 11:27 ` Petr Hracek
2015-07-13 13:16 ` Andreas Schwab
2015-07-14 7:52 ` Petr Hracek
2015-07-14 8:14 ` Andreas Schwab
2015-09-16 11:28 ` Petr Hracek
2015-09-22 10:17 ` Petr Hracek
2015-09-23 8:06 ` Petr Hracek
2015-09-23 9:34 ` Eli Zaretskii
2015-09-23 11:00 ` Petr Hracek
2015-09-23 11:14 ` Eli Zaretskii
2015-09-23 12:11 ` Petr Hracek
2015-09-23 12:23 ` Eli Zaretskii
2015-09-24 11:04 ` Petr Hracek
2015-09-24 15:32 ` Eli Zaretskii
2015-09-24 17:56 ` Petr Hracek
2015-09-26 7:58 ` Eli Zaretskii
2015-09-30 10:39 ` Petr Hracek
2015-10-01 7:43 ` Eli Zaretskii
2015-10-01 8:46 ` Petr Hracek
2015-10-01 11:44 ` Petr Hracek
2015-10-01 11:53 ` Petr Hracek
2015-10-01 12:22 ` Eli Zaretskii
2015-10-01 14:05 ` Petr Hracek
2015-10-01 16:01 ` Eli Zaretskii
2015-10-02 8:36 ` Petr Hracek
2015-10-02 8:49 ` Eli Zaretskii
2015-10-02 12:58 ` Petr Hracek
2015-10-02 13:46 ` Eli Zaretskii
2015-10-05 7:40 ` Petr Hracek [this message]
2015-10-05 8:27 ` Eli Zaretskii
2015-10-05 9:16 ` Petr Hracek
2015-10-05 9:39 ` Eli Zaretskii
2015-10-05 11:23 ` Petr Hracek
2015-10-05 11:40 ` Eli Zaretskii
2015-10-05 14:07 ` Petr Hracek
2015-10-05 16:52 ` Eli Zaretskii
2015-10-06 8:41 ` Petr Hracek
2015-10-06 11:52 ` Petr Hracek
2015-10-06 14:55 ` Eli Zaretskii
2015-10-07 8:17 ` Petr Hracek
2015-10-07 10:56 ` YAMAMOTO Mitsuharu
2015-10-07 12:26 ` Petr Hracek
2015-10-08 0:54 ` YAMAMOTO Mitsuharu
2015-10-08 13:27 ` Jaromir Capik
2015-10-10 1:40 ` YAMAMOTO Mitsuharu
2015-10-10 15:44 ` Andreas Schwab
2015-10-13 7:30 ` Petr Hracek
2015-10-13 8:30 ` Andreas Schwab
2015-10-16 15:24 ` Jaromir Capik
2015-10-19 7:20 ` Andreas Schwab
2015-09-23 12:10 ` Petr Hracek
2015-09-23 12:21 ` Eli Zaretskii
2015-09-23 13:10 ` Petr Hracek
2015-09-23 13:38 ` Petr Hracek
2015-09-23 13:57 ` Eli Zaretskii
2015-09-23 17:25 ` Glenn Morris
2015-09-23 17:47 ` Glenn Morris
2015-09-29 8:15 ` Florian Weimer
2015-07-13 12:17 ` bug#20614: Segmentation fault when building on Power8 Little Endian (ppc64le) Petr Hracek
2015-11-17 1:59 ` bug#20614: alignment problem with recent Emacs unexelf.c changes Paul Eggert
2015-11-17 9:03 ` Alan Modra
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=5612295F.4000607@redhat.com \
--to=phracek@redhat.com \
--cc=20614@debbugs.gnu.org \
--cc=eliz@gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.