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: Fri, 2 Oct 2015 10:36:27 +0200 [thread overview]
Message-ID: <560E420B.9070200@redhat.com> (raw)
In-Reply-To: <837fn6a881.fsf@gnu.org>
[-- Attachment #1: Type: text/plain, Size: 3760 bytes --]
On 10/01/2015 06:01 PM, Eli Zaretskii wrote:
>> Cc: 20614@debbugs.gnu.org
>> From: Petr Hracek <phracek@redhat.com>
>> Date: Thu, 1 Oct 2015 16:05:57 +0200
>>
>> (gdb) bt full
>> #0 0x00003fffb5a9a870 in strcmp () at /lib64/power8/libc.so.6
>> #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
>> section =
>> {sh_name = 122, sh_type = 4, sh_flags = 2, sh_addr =
>> 268483528, sh_offset = 48072, sh_size = 768, sh_link = 5, sh_info = 0,
>> sh_addralign = 8, sh_entsize = 24}
> 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.
(gdb) info frame
Stack level 1, frame at 0x3fffffffd9d0:
pc = 0x102e3724 in unexec (unexelf.c:1258); saved pc 0x101a1170
called by frame at 0x3fffffffda70, caller of frame at 0x3fffffffd770
source language c.
Arglist at 0x3fffffffd770, args: new_name=0x116387e8
"/home/phracek/rpmbuild/BUILD/emacs-24.3/src/emacs", old_name=0x11638838
"/home/phracek/rpmbuild/BUILD/emacs-24.3/src/temacs"
Locals at 0x3fffffffd770, Previous frame's sp is 0x3fffffffd9d0
Saved registers:
r30 at 0x3fffffffd9c0, r31 at 0x3fffffffd9c8, pc at 0x3fffffffd9e0,
lr at 0x3fffffffd9e0
(gdb) info locals
section = {sh_name = 122, sh_type = 4, sh_flags = 2, sh_addr =
268483528, sh_offset = 48072, sh_size = 768, sh_link = 5, sh_info = 0,
sh_addralign = 8, sh_entsize = 24}
new_file = 10
old_file = 9
new_file_size = 30790315
new_break = 0x116f0000
old_base = 0x3fffaa800000 "\177ELF\002\001\001"
new_base = 0x3fffa8aa0000 "\177ELF\002\001\001"
old_file_h = 0x3fffaa800000
new_file_h = 0x3fffa8aa0000
old_program_h = 0x3fffaa800040
new_program_h = 0x3fffa8aa0040
old_section_h = 0x3fffab1dc110
new_section_h = 0x3fffaa78c110
old_section_names = 0x3fffab1dbfcc ""
old_bss_addr = 272498688
new_bss_addr = 292487168
old_bss_size = 563072
new_data2_size = 19988480
new_data2_offset = 4063232
new_data2_addr = 272498688
old_bss_offset = 4063232
new_data2_incr = 19988480
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 = 5119871, st_nlink = 1, st_mode =
33261, st_uid = 20582, st_gid = 20582, __pad2 = 0, st_rdev = 0, st_size
= 10801771, st_blksize = 4096,
st_blocks = 20984, st_atim = {tv_sec = 1443772792, tv_nsec =
166219486}, st_mtim = {tv_sec = 1443772792, tv_nsec = 46219474}, st_ctim
= {tv_sec = 1443772792, tv_nsec = 46219474},
__unused4 = 0, __unused5 = 0, __unused6 = 0}
old_file_size = 10801771
(gdb) info args
new_name = 0x116387e8 "/home/phracek/rpmbuild/BUILD/emacs-24.3/src/emacs"
old_name = 0x11638838 "/home/phracek/rpmbuild/BUILD/emacs-24.3/src/temacs"
--
Petr Hracek
Software Engineer
Developer Experience
Red Hat, Inc
Mob: +420777056169
email: phracek@redhat.com
[-- Attachment #2: Type: text/html, Size: 5414 bytes --]
next prev parent reply other threads:[~2015-10-02 8:36 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 [this message]
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
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=560E420B.9070200@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.