On 10/01/2015 09:43 AM, Eli Zaretskii wrote: >> From: Petr Hracek >> Date: Wed, 30 Sep 2015 12:39:47 +0200 >> Cc: 20614@debbugs.gnu.org >> >> My deep observation with emacs package and binutils: >> 1) binutils-2.23.52.0.1-30.el7_1.2.ppc64le.rpm works completely. >> 2) binutils-2.23.52.0.1-40.el7.ppc64le.rpm works if row >> http://git.savannah.gnu.org/cgit/emacs.git/tree/src/unexelf.c?h=emacs-24#n869 >> is suppressed. >> >> With newer version of binutils I can see the same series:( >> like: >> Dumping under the name emacs >> emacs: Program segment above .bss in >> /builddir/build/BUILD/emacs-24.3/src/temacs >> make[2]: Leaving directory `/builddir/build/BUILD/emacs-24.3/src' >> make[2]: *** [bootstrap-emacs] Error 1 >> >> I have collected list of commits and messages against upstream: >> #1200138 >> https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=43a8475ca01b676fb764aaed0c4ed1cc16fc3c87 #1200138 >> https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=eec2f3ed9f053653ed5d629eb50e08e3ee61e9bd #1203449 >> https://bugzilla.redhat.com/attachment.cgi?id=1003499 # 1175624 .opd >> https://sourceware.org/ml/binutils/2015-01/msg00227.html >> # 1175624 .got which implies .sdata, .sbss, .plt .iplt and .branch_lt also have >> to move: https://sourceware.org/ml/binutils/2015-01/msg00228.html >> # 1175624 And .toc1: https://sourceware.org/ml/binutils/2015-01/msg00232.html >> #1194164 func@localentry expressions, which was added to FSF binutils with git >> commit 45965137 >> #1183838 https://bugzilla.redhat.com/attachment.cgi?id=986213 >> # 1172766 https://bugzilla.redhat.com/attachment.cgi?id=989450 I hope it helps >> you a bit. > I think we need help from someone who understands the Binutils part of > this. Can you ask some of the Binutils maintainers please join this > discussion and analyze the problem? Out binutils maintainers send me reference to following patch. |# Fix incorrectly generated ELF binaries and DSOs| diff -Nrup a/bfd/elf.c b/bfd/elf.c --- a/bfd/elf.c 2015-07-28 10:52:10.941754850 -0600 +++ b/bfd/elf.c 2015-07-28 10:53:34.725982912 -0600 @@ -4081,11 +4081,18 @@ _bfd_elf_map_sections_to_segments (bfd * new_segment = TRUE; } else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0 - && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0) + && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0 + && ((abfd->flags & D_PAGED) == 0 + || (((last_hdr->lma + last_size - 1) & -maxpagesize) + != (hdr->lma & -maxpagesize)))) { - /* We don't want to put a loadable section after a - nonloadable section in the same segment. - Consider .tbss sections as loadable for this purpose. */ + /* We don't want to put a loaded section after a + nonloaded (ie. bss style) section in the same segment + as that will force the non-loaded section to be loaded. + Consider .tbss sections as loaded for this purpose. + However, like the writable/non-writable case below, + if they are on the same page then they must be put + in the same segment. */ new_segment = TRUE; } else if ((abfd->flags & D_PAGED) == 0) diff -Nrup a/ld/testsuite/ld-powerpc/elfv2so.d b/ld/testsuite/ld-powerpc/elfv2so.d --- a/ld/testsuite/ld-powerpc/elfv2so.d 2015-07-28 10:52:10.921755273 -0600 +++ b/ld/testsuite/ld-powerpc/elfv2so.d 2015-07-28 10:41:10.046732001 -0600 @@ -7,31 +7,31 @@ Disassembly of section \.text: -0+320 <.*\.plt_call\.f4>: +0+300 <.*\.plt_call\.f4>: .*: (18 00 41 f8|f8 41 00 18) std r2,24\(r1\) .*: (38 80 82 e9|e9 82 80 38) ld r12,-32712\(r2\) .*: (a6 03 89 7d|7d 89 03 a6) mtctr r12 .*: (20 04 80 4e|4e 80 04 20) bctr -0+330 <.*\.plt_call\.f3>: +0+310 <.*\.plt_call\.f3>: .*: (18 00 41 f8|f8 41 00 18) std r2,24\(r1\) .*: (28 80 82 e9|e9 82 80 28) ld r12,-32728\(r2\) .*: (a6 03 89 7d|7d 89 03 a6) mtctr r12 .*: (20 04 80 4e|4e 80 04 20) bctr -0+340 <.*\.plt_call\.f2>: +0+320 <.*\.plt_call\.f2>: .*: (18 00 41 f8|f8 41 00 18) std r2,24\(r1\) .*: (30 80 82 e9|e9 82 80 30) ld r12,-32720\(r2\) .*: (a6 03 89 7d|7d 89 03 a6) mtctr r12 .*: (20 04 80 4e|4e 80 04 20) bctr -0+350 <.*\.plt_call\.f1>: +0+330 <.*\.plt_call\.f1>: .*: (18 00 41 f8|f8 41 00 18) std r2,24\(r1\) .*: (40 80 82 e9|e9 82 80 40) ld r12,-32704\(r2\) .*: (a6 03 89 7d|7d 89 03 a6) mtctr r12 .*: (20 04 80 4e|4e 80 04 20) bctr -0+360 : +0+340 : .*: (02 00 4c 3c|3c 4c 00 02) addis r2,r12,2 .*: (d8 81 42 38|38 42 81 d8) addi r2,r2,-32296 .*: (a6 02 08 7c|7c 08 02 a6) mflr r0 @@ -53,7 +53,7 @@ Disassembly of section \.text: .*: (98 01 01 00|00 00 00 00) .* .*: (00 00 00 00|00 01 01 98) .* -0+3b0 <__glink_PLTresolve>: +0+390 <__glink_PLTresolve>: .*: (a6 02 08 7c|7c 08 02 a6) mflr r0 .*: (05 00 9f 42|42 9f 00 05) bcl .* .*: (a6 02 68 7d|7d 68 02 a6) mflr r11 -- Petr Hracek Software Engineer Developer Experience Red Hat, Inc Mob: +420777056169 email: phracek@redhat.com