Date: Sat, 3 Nov 2018 17:49:55 +0200 From: Konstantin Belousov <kostikbel@gmail.com> To: Mark Millard <marklmi26-fbsd@yahoo.com> Cc: svn-src-head@freebsd.org, Alexander Richardson <arichardson@freebsd.org> Subject: Re: svn commit: r339876 - head/libexec/rtld-elf Message-ID: <20181103154955.GR5335@kib.kiev.ua> In-Reply-To: <34554290-D26E-4FED-A598-4FB3E313EA92@yahoo.com> References: <8E5A5F3A-F1A7-4702-A2F7-65D74CC5B2E5@yahoo.com> <20181102004101.GI5335@kib.kiev.ua> <E44F5772-1F8A-40B8-9C4E-B8362B768F37@yahoo.com> <003A49D7-6E8B-4775-A70B-E0EB44505D4B@yahoo.com> <20181102113827.GM5335@kib.kiev.ua> <7B29A4C8-228D-41CB-B594-98DFA456E9C8@yahoo.com> <20181102155234.GN5335@kib.kiev.ua> <E93B3880-281E-482C-9DA7-851398543B97@yahoo.com> <20181102185014.GP5335@kib.kiev.ua> <34554290-D26E-4FED-A598-4FB3E313EA92@yahoo.com>
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On Fri, Nov 02, 2018 at 05:51:25PM -0700, Mark Millard wrote: > On 2018-Nov-2, at 11:50 AM, Konstantin Belousov <kostikbel at gmail.com> wrote: > > > On Fri, Nov 02, 2018 at 10:38:08AM -0700, Mark Millard wrote: > >> . . . > > > > There seems to be an issue with the direct execution mode on ppc. > > Even otherwise working ld-elf.so.1 segfaults if I try to use it as > > standalone binary. > > > > But if I specify patched ld-elf.so.1 as the interpreter for some program, > > using 'cc -Wl,-I,<path>/ld-elf.so.1' it works. So I see there two bugs, > > one is regression due to textsize calculation, which should be fixed by > > my patch. Another is the direct exec problem. > > My head -r339076 based powerpc64 and armv7 contexts also > fail for: > > # /libexec/ld-elf.so.1 /bin/ls > > The armv7 (a Cortext-A7 context) is interestingly different > in how it fails: > > # /libexec/ld-elf.so.1 /bin/ls > ld-elf.so.1: /bin/ls: mmap of entire address space failed: Cannot allocate memory Can you show the ktrace/kdump for this ? > > My aarch64 context (a Cortext-A53 context) had no problem. > > (All 3 examples are without any of the the recent updates > or patches to ld-elf.so.1 source code.) And still, does the patch for isync range works ? You can test the new ld-elf.so.1 standalone by hard-coding its path into the binary. Build e.g. only ls(1) by using make in its directory, then re-issue the linking command with the additional flag '-Wl,-I,<path to patched ld-elf.so.1> and try to run ls.full.
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