From: Florian Weimer <fweimer@redhat.com>
To: Adhemerval Zanella via Libc-alpha <libc-alpha@sourceware.org>
Subject: Re: [RFC][PATCH v8 18/20] Add DT_GNU_FLAGS_1/DF_GNU_1_UNIQUE dynamic section+flag to glibc DSOs
Date: Tue, 23 Feb 2021 20:01:33 +0100 [thread overview]
Message-ID: <87y2fetxpu.fsf@oldenburg.str.redhat.com> (raw)
In-Reply-To: <78419617-e3ad-0453-aefe-9791fc50867d@linaro.org> (Adhemerval Zanella via Libc-alpha's message of "Tue, 23 Feb 2021 15:48:52 -0300")
* Adhemerval Zanella via Libc-alpha:
> On 23/02/2021 15:46, Vivek Das Mohapatra wrote:
>>> This patch below based on your tree could get the dynamic note on libc.so.
>>> It has to explicit add the dynamic-note.os as an extra object (adding an
>>> extra object on libc.so build will add on libc_pic.{a,os} and linker script
>>> won't handle).
>>
>> Thanks. Would you like this enabled for the necessary libraries
>> only when ld isn't new enough, or enabled unconditionally?
>>
>
> I think it would be simpler to just this scheme which is independently of
> ld version instead of using -z,unique. We might clean this up once we
> set the minimum binutils version to 2.36.
The downside of this scheme is that the injected values come first,
which may confuse some consumers (although it should not). Using the
binutils option generates a more regular-looking dynamic segment.
Thanks,
Florian
next prev parent reply other threads:[~2021-02-23 19:02 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-09 17:18 [RFC][PATCH v8 00/20] Implementation of RTLD_SHARED for dlmopen Vivek Das Mohapatra
2021-02-09 17:18 ` [RFC][PATCH v8 01/20] Declare and describe the dlmopen RTLD_SHARED flag Vivek Das Mohapatra
2021-02-15 13:08 ` Adhemerval Zanella
2021-02-15 13:29 ` Andreas Schwab
2021-02-15 13:31 ` Adhemerval Zanella
2021-02-09 17:18 ` [RFC][PATCH v8 02/20] include/link.h: Update the link_map struct to allow proxies Vivek Das Mohapatra
2021-02-15 13:11 ` Adhemerval Zanella
2021-02-09 17:18 ` [RFC][PATCH v8 03/20] elf/dl-object.c: Implement a helper function to proxy link_map entries Vivek Das Mohapatra
2021-02-15 13:30 ` Adhemerval Zanella
2021-02-09 17:18 ` [RFC][PATCH v8 04/20] elf/dl-load.c, elf-dl-open.c: Implement RTLD_SHARED dlmopen proxying Vivek Das Mohapatra
2021-02-15 14:53 ` Adhemerval Zanella
2021-02-09 17:18 ` [RFC][PATCH v8 05/20] elf/dl-fini.c: Handle proxy link_map entries in the shutdown path Vivek Das Mohapatra
2021-02-15 17:08 ` Adhemerval Zanella
2021-02-09 17:18 ` [RFC][PATCH v8 06/20] elf/dl-init.c: Skip proxied link map entries in the dl init path Vivek Das Mohapatra
2021-02-15 17:52 ` Adhemerval Zanella
2021-02-09 17:18 ` [RFC][PATCH v8 07/20] elf/dl-open.c: Don't try libc linit in namespaces with no libc mapping Vivek Das Mohapatra
2021-02-15 17:54 ` Adhemerval Zanella
2021-02-17 15:39 ` Vivek Das Mohapatra
2021-02-17 16:17 ` Adhemerval Zanella
2021-02-17 18:32 ` Vivek Das Mohapatra
2021-02-17 20:52 ` Adhemerval Zanella
2021-02-09 17:18 ` [RFC][PATCH v8 08/20] elf/dl-open.c: when creating a proxy check the libc_map in NS 0 Vivek Das Mohapatra
2021-02-15 17:55 ` Adhemerval Zanella
2021-02-09 17:18 ` [RFC][PATCH v8 09/20] Define a new dynamic section tag - DT_GNU_FLAGS_1 Vivek Das Mohapatra
2021-02-15 18:42 ` Adhemerval Zanella
2021-02-09 17:18 ` [RFC][PATCH v8 10/20] Abstract the loaded-DSO search code into a private helper function Vivek Das Mohapatra
2021-02-15 19:25 ` Adhemerval Zanella
2021-02-09 17:18 ` [RFC][PATCH v8 11/20] Compare loaded DSOs by file ID and check for DF_GNU_1_UNIQUE Vivek Das Mohapatra
2021-02-18 20:45 ` Adhemerval Zanella
2021-02-09 17:18 ` [RFC][PATCH v8 12/20] Use the new DSO finder helper function since we have it Vivek Das Mohapatra
2021-02-19 14:39 ` Adhemerval Zanella
2021-02-19 19:50 ` Adhemerval Zanella
2021-02-22 18:44 ` Vivek Das Mohapatra
2021-02-22 18:51 ` Adhemerval Zanella
2021-02-22 23:50 ` Vivek Das Mohapatra
2021-02-09 17:18 ` [RFC][PATCH v8 13/20] Use the DSO search helper to check for preloaded DT_GNU_UNIQUE DSOs Vivek Das Mohapatra
2021-02-19 17:26 ` Adhemerval Zanella
2021-02-09 17:18 ` [RFC][PATCH v8 14/20] When loading DSOs into alternate namespaces check for DT_GNU_UNIQUE Vivek Das Mohapatra
2021-02-19 18:11 ` Adhemerval Zanella
2021-02-09 17:18 ` [RFC][PATCH v8 15/20] Suppress audit calls when a (new) namespace is empty Vivek Das Mohapatra
2021-02-19 19:45 ` Adhemerval Zanella
2021-02-09 17:18 ` [RFC][PATCH v8 16/20] Suppress inter-namespace DSO sharing for audit libraries Vivek Das Mohapatra
2021-02-19 20:39 ` Adhemerval Zanella
2021-02-09 17:18 ` [RFC][PATCH v8 17/20] dlsym, dlvsym should be able to look up symbols via DSO proxies Vivek Das Mohapatra
2021-02-22 18:51 ` Adhemerval Zanella
2021-02-09 17:18 ` [RFC][PATCH v8 18/20] Add DT_GNU_FLAGS_1/DF_GNU_1_UNIQUE dynamic section+flag to glibc DSOs Vivek Das Mohapatra
2021-02-22 20:39 ` Adhemerval Zanella
2021-02-22 21:19 ` Florian Weimer
2021-02-22 21:53 ` Adhemerval Zanella
2021-02-23 3:26 ` Alan Modra
2021-02-23 11:57 ` Adhemerval Zanella
2021-02-23 10:00 ` Florian Weimer
2021-02-23 11:58 ` Adhemerval Zanella
2021-02-23 12:12 ` Florian Weimer
2021-02-23 0:17 ` Vivek Das Mohapatra
2021-02-23 12:02 ` Adhemerval Zanella
2021-02-23 13:24 ` Adhemerval Zanella
2021-02-23 18:46 ` Vivek Das Mohapatra
2021-02-23 18:48 ` Adhemerval Zanella
2021-02-23 19:01 ` Florian Weimer [this message]
2021-02-23 19:06 ` Adhemerval Zanella
2021-02-09 17:18 ` [RFC][PATCH v8 19/20] Add dlmopen / RTLD_SHARED tests Vivek Das Mohapatra
2021-02-26 19:50 ` Adhemerval Zanella
2021-02-26 20:26 ` Andreas Schwab
2021-02-09 17:18 ` [RFC][PATCH v8 20/20] Restore separate libc loading for the TLS/namespace storage test Vivek Das Mohapatra
2021-02-09 19:01 ` [RFC][PATCH v8 00/20] Implementation of RTLD_SHARED for dlmopen Joseph Myers
2021-02-10 12:25 ` Vivek Das Mohapatra
2021-02-10 18:32 ` Joseph Myers
2021-02-12 18:52 ` Adhemerval Zanella
2021-02-12 18:56 ` Florian Weimer
2021-02-12 19:01 ` Adhemerval Zanella
2021-02-12 19:29 ` Florian Weimer
2021-02-18 14:41 ` Vivek Das Mohapatra
2021-02-18 15:02 ` Florian Weimer
2021-02-18 15:05 ` Vivek Das Mohapatra
2021-02-19 8:57 ` Florian Weimer
2021-02-19 15:08 ` Vivek Das Mohapatra
2021-03-04 18:27 ` Adhemerval Zanella
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