[Bug ld/26936] [ld, PIE] ld drops relocation for .text.__x86.get_pc_thunk.bx

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26936

--- Comment #8 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to H.J. Lu from comment #7)
> (In reply to Tom de Vries from comment #6)
> > (In reply to Tom de Vries from comment #0)
> > > So, when compiling like this:
> > > ...
> > > $ gcc -g -fsplit-stack src/gcc/testsuite/gcc.dg/split-1.c -m32
> > > ...
> > 
> > It's not clear to me from comment 2, have you tried this?
> 
> I got
> 
> [hjl@gnu-cfl-2 tmp]$ file a.out 
> a.out: ELF 32-bit LSB pie executable, Intel 80386, version 1 (SYSV),
> dynamically linked, interpreter /lib/ld-linux.so.2,
> BuildID[sha1]=59ea9d8ac326aacb2ceb44abae5ad442d00e047c, for GNU/Linux 3.2.0,
> with debug_info, not stripped
> [hjl@gnu-cfl-2 tmp]$ gdb a.out 
> GNU gdb (GDB) Fedora 10.1-2.0.fc33
> Copyright (C) 2020 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.
> Type "show copying" and "show warranty" for details.
> This GDB was configured as "x86_64-redhat-linux-gnu".
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> 
> For help, type "help".
> Type "apropos word" to search for commands related to "word"...
> Reading symbols from a.out...
> (gdb) b  __x86.get_pc_thunk.bx
> Breakpoint 1 at 0x11b0: file morestack.S, line 636.
> (gdb) r
> Starting program: /tmp/a.out 
> Missing separate debuginfos, use: dnf debuginfo-install
> glibc-2.32-2.0.fc33.i686
> 
> Breakpoint 1, __x86.get_pc_thunk.bx () at morestack.S:636
> Missing separate debuginfos, use: dnf debuginfo-install
> libgcc-10.2.1-6.1.fc33.i686
> (gdb) 
> 
> Does it look OK?

I see, yes that looks OK, thanks for showing me.

I hope then that it will reproduce for you with the .s based approach from
comments 3/4/5.

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