[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #37 from Sergei Trofimovich --- The patch also fixes this old bug: https://bugzilla.redhat.com/show_bug.cgi?id=33354 Despite being marked as fixed it fails on modern toolchain with slight overflow. Address of local constant was

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #35 from Sergei Trofimovich --- Created attachment 37180 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37180=edit 0001-ia64-don-t-use-dynamic-relocations-for-local-symbols.patch

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #36 from Sergei Trofimovich --- Tested the patch on top of gcc-5.3.0 / glibc-2.22-r1. Relocation in rtld.os is R_IA64_GPREL64I and is just an immediate offset in ld.so: # objdump -r -d elf/rtld.os | grep -C4 rtld_local+0x38

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #34 from Sergei Trofimovich --- Wrote more details on how exactly things were broken: http://trofi.github.io/posts/189-glibc-on-ia64-or-how-relocations-bootstrap.html

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #32 from Sergei Trofimovich --- (In reply to Andreas Schwab from comment #31) > @ltoffx on symbol+addend doesn't make any sense. This computes an offset > into the GOT, so any addend needs to be added _after_ loading the actual >

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #33 from Sergei Trofimovich --- Sent glibc workaround for review as: https://sourceware.org/ml/libc-alpha/2015-12/msg00556.html

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #29 from Andreas Schwab --- '_rtld_local#+15032385536' is just a hint that is passed through to the linker in the addend of the R_IA64_LDXMOV relocation for the insn. That tells the linker the addend of the

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #30 from Sergei Trofimovich --- Aha, got it. I've factored out GNU_HASH section setup crash into separate very simple function: void __attribute__ ((unused, noinline)) do_it_again (struct link_map *l, ElfW(Dyn) *dyn) {

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #31 from Andreas Schwab --- @ltoffx on symbol+addend doesn't make any sense. This computes an offset into the GOT, so any addend needs to be added _after_ loading the actual symbol address from the GOT.

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 Sergei Trofimovich changed: What|Removed |Added CC||slyfox at inbox dot ru --- Comment

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 Eric Botcazou ebotcazou at gcc dot gnu.org changed: What|Removed |Added Attachment #33349|0 |1 is

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 Eric Botcazou ebotcazou at gcc dot gnu.org changed: What|Removed |Added Status|WAITING |NEW ---

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #22 from Richard Biener rguenth at gcc dot gnu.org --- (In reply to Mike Frysinger from comment #18) thanks for your help Eric. new bisection shows r187042 as a possible culprit. feel free to de-cc yourself :). Richard: any

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #23 from Eric Botcazou ebotcazou at gcc dot gnu.org --- Created attachment 33349 -- https://gcc.gnu.org/bugzilla/attachment.cgi?id=33349action=edit Reduced testcase To be compiled at -O1.

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 Eric Botcazou ebotcazou at gcc dot gnu.org changed: What|Removed |Added Status|NEW |WAITING ---

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #25 from Mike Frysinger vapier at gentoo dot org --- here's the series of link commands: gcc -nostdlib -nostartfiles -r -o elf/librtld.os \ '-Wl,-(' /home/vapier/glibc/build/elf/dl-allobjs.os elf/rtld-libc.a -lgcc \ '-Wl,-)'

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 Mike Frysinger vapier at gentoo dot org changed: What|Removed |Added CC||rguenth at gcc

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #19 from Mike Frysinger vapier at gentoo dot org --- Created attachment 33340 -- https://gcc.gnu.org/bugzilla/attachment.cgi?id=33340action=edit rtld.s generated -- passing w/r187038

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #20 from Mike Frysinger vapier at gentoo dot org --- Created attachment 33341 -- https://gcc.gnu.org/bugzilla/attachment.cgi?id=33341action=edit rtld.s generated -- failing w/r187042

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 Eric Botcazou ebotcazou at gcc dot gnu.org changed: What|Removed |Added Status|WAITING |NEW ---

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 Eric Botcazou ebotcazou at gcc dot gnu.org changed: What|Removed |Added Status|UNCONFIRMED |WAITING

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #13 from Eric Botcazou ebotcazou at gcc dot gnu.org --- i've bisected things back to r188118. before that commit, gcc compiles rtld.c fine and produces a working ldso. starting at that commit, we get segfaults. In fact r188118

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #14 from Andrew Pinski pinskia at gcc dot gnu.org --- (In reply to Eric Botcazou from comment #12) i've bisected things back to r188118. before that commit, gcc compiles rtld.c fine and produces a working ldso. starting at that

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #15 from Mike Frysinger vapier at gentoo dot org --- (In reply to Andrew Pinski from comment #11) i tried 4.8.3 w/those two patches applied but still see the crash :( (In reply to Eric Botcazou from comment #12) correct, gcc-4.6.4

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #16 from Mike Frysinger vapier at gentoo dot org --- Created attachment 33321 -- https://gcc.gnu.org/bugzilla/attachment.cgi?id=33321action=edit rtld.i preprocessed source the preprocessed output is the same between 4.7.4 4.8.3

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #17 from Mike Frysinger vapier at gentoo dot org --- (In reply to Eric Botcazou from comment #13) fwiw, i took latest 4.8 branch and reverted that change, and ldso works i'll test r188009 and related too though

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 Mike Frysinger vapier at gentoo dot org changed: What|Removed |Added CC||ebotcazou at

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #11 from Andrew Pinski pinskia at gcc dot gnu.org --- This sounds like the same bug which I fixed with the set of patches at https://gcc.gnu.org/ml/gcc-patches/2014-08/msg00932.html .

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #9 from Mike Frysinger vapier at gentoo dot org --- i've verified that 4.8.0 4.9.1 fail as well :/ binutils 2.24 doesn't help

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #6 from devurandom at gmx dot net --- Did anyone figure out what's going on? Did the gdb log bring new insights?

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #7 from Mike Frysinger vapier at gentoo dot org --- it's beyond my (ia64 beginners) experience to track this down further i can certainly make available ssh access to interested devs ... it's a fast system on a fast edu connection

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #8 from devurandom at gmx dot net --- (In reply to Mike Frysinger from comment #7) it's beyond my (ia64 beginners) experience to track this down further i can certainly make available ssh access to interested devs ... it's a fast

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 Mike Frysinger vapier at gentoo dot org changed: What|Removed |Added CC||vapier at gentoo

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 devurandom at gmx dot net changed: What|Removed |Added Target||ia64-unknown-linux-gnu

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #4 from Andreas Schwab sch...@linux-m68k.org --- How about showing the previous ~20 insns here.

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #5 from Mike Frysinger vapier at gentoo dot org --- Created attachment 32385 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=32385action=edit gdb session here's the trace from the first insn where dyn is pointing to DT_GNU_HASH.

[Bug other/60465] Compiling glibc-2.17,2.18 with gcc-4.8.2 and binutils-2.23.2,2.24 results in segfaults in _start / elf_get_dynamic_info

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60465 --- Comment #1 from devurandom at gmx dot net --- Created attachment 32310 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=32310action=edit emerge --info