I have a question:
would it be possible to remove unexelf.c code and replace them
with a
"just map a file with pre-compiled byte code" as advice me a
colleagues in Red Hat?
It seems that this code is also incompatible with PIE.
Together with our binutils-2.23.52.0.1-54 (
https://bugzilla.redhat.com/show_bug.cgi?id=1247126)
it segfaults each time. Now.
What do you think about it?
Nowadays I have commented out the code mentioned on line
http://git.savannah.gnu.org/cgit/emacs.git/tree/src/unexelf.c?h=emacs-24#n869
and afterwards is fails with
Finding pointers to doc strings...
Finding pointers to doc strings...done
Dumping under the name emacs
/bin/sh: line 7: 15764 Segmentation fault `/bin/pwd`/temacs --batch --load loadup bootstrap
make[2]: *** [bootstrap-emacs] Error 1
make[2]: Leaving directory `/builddir/build/BUILD/emacs-24.3/build-gtk/src'
Important version of packages:
glibc-2.17-103.el7.ppc64le
gcc-4.8.5-4.el7.ppc64le
binutils-2.23.52.0.1-54.el7.ppc64le
Greetings
Petr
On 09/16/2015 01:28 PM, Petr Hracek wrote:
On 07/14/2015 09:52 AM, Petr Hracek
wrote:
On
07/13/2015 03:16 PM, Andreas Schwab wrote:
Petr Hracek <phracek@redhat.com>
writes:
Does emacs-24.3 support ppc64le?
https://build.opensuse.org/package/binaries/openSUSE:13.2/emacs?repository=ports
http://download.opensuse.org/ports/ppc/distribution/13.2/repo/oss/suse/ppc64le/emacs-x11-24.3-17.2.2.ppc64le.rpm
Andreas.
I have find out that the error message
Loading /home/phracek/rpmbuild/BUILD/emacs-24.3/lisp/tooltip.el
(source)...
Finding pointers to doc strings...
Finding pointers to doc strings...done
Dumping under the name emacs
emacs: Program segment above .bss in
/home/phracek/rpmbuild/BUILD/emacs-24.3/build-gtk/src/temacs
make[2]: *** [bootstrap-emacs] Error 1
comes from file src/unexelf.c line 860 (emacs-24.3)
What this function does?
I saw in openSUSE SRPM that option --with-wide-int is used.
In Fedora or RHEL we are not using it.
Options which are used for compiling are:
./configure --build=powerpc64le-redhat-linux-gnu
--host=powerpc64le-redhat-linux-gnu --program-prefix=
--disable-dependency-tracking --prefix=/usr --exec-prefix=/usr
--bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc
--datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib64
--libexecdir=/usr/libexec --localstatedir=/var
--sharedstatedir=/var/lib --mandir=/usr/share/man
--infodir=/usr/share/info --with-dbus --with-gif --with-jpeg
--with-png --with-rsvg --with-tiff --with-xft --with-xpm
--with-x-toolkit=gtk3 --with-gpm=no
build_alias=powerpc64le-redhat-linux-gnu
host_alias=powerpc64le-redhat-linux-gnu CFLAGS=-DMAIL_USE_LOCKF
-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions
-fstack-protector-strong --param=ssp-buffer-size=4
-grecord-gcc-switches -m64 -mcpu=power7 -mtune=power8
LDFLAGS=-Wl,-z,relro --no-create --no-recursion
Building emacs package on Fedora or even on OpenSuse works fine.
But under RHEL-7 still fails.
Emacs is build up with full RELRO, though.
Version of packages which are used for compilation are:
gcc-4.8.3
automake-1.13.4
autoconf-2.69
Compilation flags are:
./configure --build=ppc64le-redhat-linux-gnu --host=ppc64le-redhat-linux-gnu --program-prefix= --disable-dependency-tracking --prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc --datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib64 --libexecdir=/usr/libexec --localstatedir=/var --sharedstatedir=/var/lib --mandir=/usr/share/man --infodir=/usr/share/info --enable-link-time-optimization --with-dbus --with-gif --with-jpeg --with-png --with-rsvg --with-tiff --with-xft --with-xpm --with-x-toolkit=gtk3 --with-gpm=no
+ LDFLAGS=-Wl,-z,relro
+ export LDFLAGS
+ CFLAGS='-DMAIL_USE_LOCKF -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mcpu=power7 -mtune=power8'
+ export CFLAGS
+ CXXFLAGS='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mcpu=power7 -mtune=power8'
+ export CXXFLAGS
+ FFLAGS='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mcpu=power7 -mtune=power8 -I/usr/lib64/gfortran/modules'
+ export FFLAGS
+ FCFLAGS='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mcpu=power7 -mtune=power8 -I/usr/lib64/gfortran/modules'
+ export FCFLAGS
+ LDFLAGS=-Wl,-z,relro
+ export LDFLAGS
emacs is SPEC file is compiled so that
in %prep section is:
- setup
- patching some files
- ./autogen.sh
%build section for emacs-gtk:
- ./configure is called.
- make bootstrap
- make
%build section for emacs-nox is:
- ./configure is called.
- make
Is this correct?
Compilator has settings like:
CC='gcc -std=gnu99' CFLAGS='-DMAIL_USE_LOCKF -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mcpu=power7 -mtune=power8 -flto=32' CPPFLAGS='' \
LDFLAGS='-Wl,-z,relro -Wl,-znocombreloc ' MAKE='make'
gcc -std=gnu99 -DHAVE_CONFIG_H -I. -I/builddir/build/BUILD/emacs-24.3/lib -I../src -I/builddir/build/BUILD/emacs-24.3/src -DMAIL_USE_LOCKF -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mcpu=power7 -mtune=power8 -flto=32 -c /builddir/build/BUILD/emacs-24.3/lib/allocator.c
linker has a settings like:
gcc -std=gnu99 -I. -I../src -I../lib -I/builddir/build/BUILD/emacs-24.3/lib-src -I/builddir/build/BUILD/emacs-24.3/lib-src/../src -I/builddir/build/BUILD/emacs-24.3/lib-src/../lib -Wl,-z,relro -Wl,-znocombreloc -DMAIL_USE_LOCKF -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mcpu=power7 -mtune=power8 -flto=32 -DEMACS_NAME="\"GNU Emacs\"" \
-DVERSION="\"24.3\"" /builddir/build/BUILD/emacs-24.3/lib-src/etags.c \
regex.o ../lib/libgnu.a -o etags
Before segmentation fault build log is:
if test "no" = "yes"; then \
rm -f bootstrap-emacs; \
ln temacs bootstrap-emacs; \
else \
`/bin/pwd`/temacs --batch --load loadup bootstrap || exit 1; \
test "X" = X || -zex emacs; \
mv -f emacs bootstrap-emacs; \
fi
Loading loadup.el (source)...
Using load-path (/builddir/build/BUILD/emacs-24.3/lisp /builddir/build/BUILD/emacs-24.3/lisp/emacs-lisp /builddir/build/BUILD/emacs-24.3/lisp/language /builddir/build/BUILD/emacs-24.3/lisp/international /builddir/build/BUILD/emacs-24.3/lisp/textmodes)
Loading emacs-lisp/byte-run (source)...
Loading emacs-lisp/backquote (source)...
[ .. snip ...]dir/build/BUILD/emacs-24.3/lisp/vc/vc-hooks.el (source)...
Loading /builddir/build/BUILD/emacs-24.3/lisp/vc/ediff-hook.el (source)...
Loading /builddir/build/BUILD/emacs-24.3/lisp/tooltip.el (source)...
Finding pointers to doc strings...
Finding pointers to doc strings...done
Dumping under the name emacs
emacs: Program segment above .bss in /builddir/build/BUILD/emacs-24.3/build-gtk/src/temacs
make[2]: *** [bootstrap-emacs] Error 1
make[2]: Leaving directory `/builddir/build/BUILD/emacs-24.3/build-gtk/src'
make[1]: *** [src] Error 2
Part of code which is relevant is from src/unexelf.c:
for (n = new_file_h->e_phnum; --n >= 0; )
{
/* Compute maximum of all requirements for alignment of section. */
ElfW (Word) alignment = (NEW_PROGRAM_H (n)).p_align;
if ((OLD_SECTION_H (old_bss_index)).sh_addralign > alignment)
alignment = OLD_SECTION_H (old_bss_index).sh_addralign;
#ifdef __sgi
/* According to r02kar@x4u2.desy.de (Karsten Kuenne)
and oliva@gnu.org (Alexandre Oliva), on IRIX 5.2, we
always get "Program segment above .bss" when dumping
when the executable doesn't have an sbss section. */
if (old_sbss_index != -1)
#endif /* __sgi */
if (NEW_PROGRAM_H (n).p_vaddr + NEW_PROGRAM_H (n).p_filesz
> (old_sbss_index == -1
? old_bss_addr
: round_up (old_bss_addr, alignment)))
fatal ("Program segment above .bss in %s", old_name);
if (NEW_PROGRAM_H (n).p_type == PT_LOAD
If I understand there shouldn't be a problem on ppc64le.
But I don't understand a code at all.
--
Petr Hracek
Software Engineer
Developer Experience
Red Hat, Inc
Mob: +420777056169
email: phracek@redhat.com