* Messages for package sys-devel/gcc-4.9.3: * QA Notice: The following files contain runtime text relocations * Text relocations force the dynamic linker to perform extra * work at startup, waste system resources, and may pose a security * risk. On some architectures, the code may not even function * properly, if at all. * For more information, see http://hardened.gentoo.org/pic-fix-guide.xml * Please include the following list of files in your report: * TEXTREL usr/libexec/gcc/ia64-unknown-linux-gnu/4.9.3/cc1plus * TEXTREL usr/libexec/gcc/ia64-unknown-linux-gnu/4.9.3/cc1 * TEXTREL usr/libexec/gcc/ia64-unknown-linux-gnu/4.9.3/lto1 * TEXTREL usr/libexec/gcc/ia64-unknown-linux-gnu/4.9.3/f951
Portage 2.2.14 (python 2.7.9-final-0, default/linux/ia64/13.0, gcc-4.9.3, glibc-2.19-r1, 3.14.14-gentoo ia64) ================================================================= System uname: Linux-3.14.14-gentoo-ia64-Dual-Core_Intel-R-_Itanium-R-_Processor_9040-with-gentoo-2.2 KiB Mem: 16660784 total, 5077712 free KiB Swap: 1999184 total, 1991824 free Timestamp of tree: Wed, 18 Nov 2015 03:00:01 +0000 ld ld di GNU (Gentoo 2.24 p1.4) 2.24 app-shells/bash: 4.2_p53 dev-java/java-config: 2.2.0 dev-lang/perl: 5.20.1-r4 dev-lang/python: 2.7.9-r1, 3.3.5-r1 sys-apps/baselayout: 2.2 sys-apps/openrc: 0.12.4 sys-apps/sandbox: 2.6-r1 sys-devel/autoconf: 2.69 sys-devel/automake: 1.13.4, 1.14.1, 1.15 sys-devel/binutils: 2.24-r3 sys-devel/gcc: 4.7.4, 4.9.3 sys-devel/gcc-config: 1.7.3 sys-devel/libtool: 2.4.6 sys-devel/make: 4.0-r1 sys-kernel/linux-headers: 3.18 (virtual/os-headers) sys-libs/glibc: 2.19-r1 Repositories: gentoo ACCEPT_KEYWORDS="ia64" ACCEPT_LICENSE="*" CBUILD="ia64-unknown-linux-gnu" CFLAGS="-O2 -pipe -mtune=itanium2" CHOST="ia64-unknown-linux-gnu" CONFIG_PROTECT="/etc" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php5.3/ext-active/ /etc/php/apache2-php5.4/ext-active/ /etc/php/apache2-php5.5/ext-active/ /etc/php/cgi-php5.3/ext-active/ /etc/php/cgi-php5.4/ext-active/ /etc/php/cgi-php5.5/ext-active/ /etc/php/cli-php5.3/ext-active/ /etc/php/cli-php5.4/ext-active/ /etc/php/cli-php5.5/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-O2 -pipe -mtune=itanium2" DISTDIR="/usr/portage/distfiles" EMERGE_DEFAULT_OPTS="--with-bdeps y --keep-going y -1" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs collision-protect config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync multilib-strict news parallel-fetch preserve-libs protect-owned sandbox sfperms split-log strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="http://distfiles.gentoo.org" LANG="it_IT.UTF-8" LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,--hash-style=gnu" MAKEOPTS="-j4" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="" USE="acl berkdb bzip2 cli cracklib crypt cxx dri fortran gdbm ia64 iconv ipv6 modules ncurses nls nptl openmp pam pcre readline session ssl tcpd unicode xattr zlib" ALSA_CARDS="hda-intel" ELIBC="glibc" INPUT_DEVICES="keyboard mouse evdev" KERNEL="linux" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="am fil zh af ca cs da de el es et gl hu nb nl pl pt ro ru sk sl sv uk bg cy en eo fo ga he id ku lt lv mk ms nn sw tn zu ja zh_TW en_GB pt_BR ko zh_CN ar en_CA fi kk oc sr tr fa wa nds as be bn bn_BD bn_IN en_US es_AR es_CL es_ES es_MX eu fy fy_NL ga_IE gu gu_IN hi hi_IN is ka kn ml mr nn_NO or pa pa_IN pt_PT rm si sq sv_SE ta ta_LK te th vi ast dz km my om sh ug uz ca@valencia sr@ijekavian sr@ijekavianlatin sr@latin csb hne mai se es_LA fr_CA zh_HK br la no es_CR et_EE sr_CS bo hsb hy mn sr@Latn lb ne bs tg uz@cyrillic xh be_BY brx ca_XV dgo en_ZA gd kok ks ky lo mni nr ns pap ps rw sa_IN sat sd ss st sw_TZ ti ts ve mt ia az me tl ak hy_AM lg nso son ur_PK it fr nb nb_NO hr nan ur tk cs_CZ da_DK de_1901 de_CH en_AU lt_LT pl_PL sa sk_SK th_TH ta_IN tt sco ha mi ven ar_SY el_GR ro_RO ru_RU sl_SI uk_UA vi_VN ar_SY te_IN de_DE es_VE fa_IR fr_FR hu_HU id_ID it_IT ja_JP ka_GE nl_NL sr_BA sr_RS ca_ES fi_FI he_IL jv ru_gold yi eu_ES" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_4" RUBY_TARGETS="ruby20 ruby21" USERLAND="GNU" VIDEO_CARDS="radeon"
You should probably file an upstream bug for this.
It could as well be a scanelf bug.
The report is still there. New pax-utils version reports the error in a better way: guppy ~ # scanelf -qTR /usr scanelf: /usr/libexec/gcc/ia64-unknown-linux-gnu/7.3.0/cc1plus: DT_RELA is out of file range scanelf: scanelf_file_textrels(): ELF /usr/libexec/gcc/ia64-unknown-linux-gnu/7.3.0/cc1plus has TEXTREL markings but doesnt appear to have any real TEXTREL's !? scanelf does not recognize the file as valid.
It is triggered by scanelf because cc1plus has an empty TEXTREL section. Usually ia64 files have no TEXTREL sections at all. $ dumpelf /usr/libexec/gcc/ia64-unknown-linux-gnu/7.3.0/cc1plus /* Dynamic tag #28 'DT_TEXTREL' 0x2099548 */ { .d_tag = 0x16 , .d_un = { .d_val = 0x0 , .d_ptr = 0x0 , }, }, For some reason .sh_addr contains absolute address in every SHT_RELA section for any ELF on ia64 system. Be it gcc or anything else. /* Section Header #8 '.rela.dyn' 0x20AA610 */ { .sh_type = 4 , /* [SHT_RELA] */ .sh_addr = 0x4000000000104B08 , .sh_offset = 1067784 , /* (bytes) */ ... }, /* Section Header #9 '.rela.IA_64.pltoff' 0x20AA650 */ { .sh_type = 4 , /* [SHT_RELA] */ .sh_addr = 0x4000000000120ED0 , .sh_offset = 44720 , /* (bytes) */ ... }, For comparison on amd64 system: /* Section Header #8 '.rela.dyn' 0xBDD58 */ { .sh_type = 4 , /* [SHT_RELA] */ .sh_addr = 0x4148 , .sh_offset = 16712 , /* (bytes) */ ... }, /* Section Header #9 '.rela.plt' 0xBDD98 */ { ... .sh_type = 4 , /* [SHT_RELA] */ .sh_addr = 0xAEB0 , .sh_offset = 44720 , /* (bytes) */ ... }, Note how on amd64 address and offset are the same but on ia64 sh_addr contains absolute address. I think we have a few bugs here: 1. scanelf uses .sh_addr instead of .sh_offset 2. binutils leaves TEXTREL sections even it those are not populated Let's see if I can fix the first one.
Created attachment 520066 [details, diff] 0001-scanelf.c-fix-TEXTREL-parsing-for-files-with-non-zer.patch 0001-scanelf.c-fix-TEXTREL-parsing-for-files-with-non-zer.patch to fix scanelf to report correct TEXTRELs. This enables correct reports: $ ./scanelf -T ia64_bug_gcc/cc1plus TYPE TEXTRELS FILE cc1plus: _Z42gt_ggc_mx_hash_table_abstract_type_hasher_Pv [0x4000000001DC2698] in (optimized out: previous gt_ggc_r_gt_cp_typeck2_h) [0x4000000001DC2680] cc1plus: _Z42gt_pch_nx_hash_table_abstract_type_hasher_Pv [0x4000000001DC26A0] in (optimized out: previous gt_ggc_r_gt_cp_typeck2_h) [0x4000000001DC2680] cc1plus: _Z28gt_ggc_mx_vec_tinfo_s_va_gc_Pv [0x4000000001DD51F8] in (optimized out: previous gt_ggc_r_gt_cp_rtti_h) [0x4000000001DD51E0] cc1plus: _Z28gt_pch_nx_vec_tinfo_s_va_gc_Pv [0x4000000001DD5200] in (optimized out: previous gt_ggc_r_gt_cp_rtti_h) [0x4000000001DD51E0] ...
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/proj/pax-utils.git/commit/?id=e7b8f34f4557d7071a955ccab813ec41aeeb966b commit e7b8f34f4557d7071a955ccab813ec41aeeb966b Author: Sergei Trofimovich <slyfox@gentoo.org> AuthorDate: 2018-02-18 20:10:45 +0000 Commit: Sergei Trofimovich <slyfox@gentoo.org> CommitDate: 2018-02-18 20:10:45 +0000 scanelf.c: fix TEXTREL parsing for files with non-zero load address In bug #566118 scanelf failed to decode TEXTRELs on gcc binaries where program headers have absolute addresses: $ dumpelf ia64_bug_gcc/cc1plus /* Dynamic tag #25 'DT_RELA' 0x2099518 */ { .d_tag = 0x7 , .d_un = { .d_val = 0x4000000000104B08 , .d_ptr = 0x4000000000104B08 , }, }, /* Section Header #8 '.rela.dyn' 0x20AA610 */ { .sh_type = 4 , /* [SHT_RELA] */ .sh_addr = 0x4000000000104B08 , .sh_offset = 1067784 , /* (bytes) */ }, Before the change scanelf assumed DT_RELA.d_ptr is a relative offset. This is not true in general case but good-enough for DSOs as they have zero load address. This change extends the check for executables. To make addresses relative again we find load address of first byte from program header with 'p_offset'. /* Program Header #2 0xB0 */ { .p_type = 1 , /* [PT_LOAD] */ .p_offset = 0 , /* (bytes into file) */ .p_vaddr = 0x4000000000000000 , /* (virtual addr at runtime) */ .p_paddr = 0x4000000000000000 , /* (physical addr at runtime) */ }, Bug: https://bugs.gentoo.org/566118 Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org> scanelf.c | 24 +++++++++++++++++++----- 1 file changed, 19 insertions(+), 5 deletions(-)}
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=e68b80427bfb89876451f40d868d509d5183c327 commit e68b80427bfb89876451f40d868d509d5183c327 Author: Sergei Trofimovich <slyfox@gentoo.org> AuthorDate: 2018-02-24 10:33:27 +0000 Commit: Sergei Trofimovich <slyfox@gentoo.org> CommitDate: 2018-02-24 10:33:34 +0000 app-misc/pax-utils: bump up to 1.2.3, bug #566118 This release can print textrels on executable files. Bug: https://bugs.gentoo.org/566118 Package-Manager: Portage-2.3.24, Repoman-2.3.6 app-misc/pax-utils/Manifest | 1 + app-misc/pax-utils/pax-utils-1.2.3.ebuild | 56 +++++++++++++++++++++++++++++++ 2 files changed, 57 insertions(+)}
Here is the minimal reproducer (rdynamic + function pointer in .rodata): $ cat lto-lang.cc struct a { int (*b)(void); int c; }; int d(void) {} const a e{d}; int main(){} $ ia64-unknown-linux-gnu-g++ -O0 -no-pie -fno-PIE lto-lang.cc -o lto-lang -rdynamic && scanelf -qtR lto-lang TEXTREL lto-lang
Filed https://gcc.gnu.org/PR84553 upstream to clarify if it's a gcc bug or binutils.
Queued a fix for gcc-8.1.0 patchset 1.3: https://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo/src/patchsets/gcc/8.1.0/gentoo/ ``` date: 2018-05-07 13:47:01 +0100; author: slyfox; state: Exp; lines: +2 -0; commitid: 71e75af04ab34567; ia64: fix textrels on -rdynamic binaries Bug: https://gcc.gnu.org/PR84553 Bug: https://bugs.gentoo.org/566118 ```
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=6f027fd9b535c53a19d442b95eea99b2a9158d08 commit 6f027fd9b535c53a19d442b95eea99b2a9158d08 Author: Sergei Trofimovich <slyfox@gentoo.org> AuthorDate: 2018-05-16 21:36:24 +0000 Commit: Sergei Trofimovich <slyfox@gentoo.org> CommitDate: 2018-05-16 21:37:04 +0000 sys-devel/gcc: bump patchset up to 1.3 for gcc-8.1.0 3 new patches: + 95_all_ia64-TEXTREL.patch : fix TEXTRELs on -rdynamic binaries + 96_all_lto-O2-PR85655.patch : fix gcc -flto SIGSEGV on mariadb + 97_all_disable-systemtap-switch.patch : add --disable-systemtap switch Bug: https://bugs.gentoo.org/566118 Bug: https://bugs.gentoo.org/655518 Bug: https://bugs.gentoo.org/654748 Package-Manager: Portage-2.3.36, Repoman-2.3.9 sys-devel/gcc/Manifest | 2 +- sys-devel/gcc/{gcc-8.1.0-r2.ebuild => gcc-8.1.0-r3.ebuild} | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
Let's target 8.1.0-r3 and newer.
