Re: [RFC PATCH 03/23] Allow glibc to be compiled without EXEC_PAGESIZE

[Florian Weimer]

* Sergey Bugaev:

> We could define EXEC_PAGESIZE to some conservative value on
> aarch64-gnu too, if it turns out that this little workaround is really
> required. But it seems cleaner to make sure we don't need to, as
> Roland's email suggests, and introducing a new port that doesn't have
> a fixed page size (and doesn't come with an EXEC_PAGESIZE value
> already defined in kernel headers) seems to be a good opportunity to
> do that. That's my reasoning here.

But the ELF image must be laid out with certain expectations regarding
the maximum support page size.  Otherwise, something (kernel or dynamic
linker) needs to perform copies or upgrade conflicting permissions
within one page to a superset of all permissions.  I don't think we have
code for that today, and we wouldn't necessarily want to implement that,
I think.

Thanks,
Florian

Regeneration of 'gcc/config/riscv/riscv.opt.urls' (was: [PATCH v2 2/3] aarch64: Add support for aarch64-gnu (GNU/Hurd on AArch64))

[Thomas Schwinge]

Hi!

On 2024-04-09T09:24:29-0700, Palmer Dabbelt  wrote:
> On Tue, 09 Apr 2024 01:04:34 PDT (-0700), buga...@gmail.com wrote:
>> On Tue, Apr 9, 2024 at 10:27 AM Thomas Schwinge  
>> wrote:
>>> Thanks, pushed to trunk branch:
>>>
>>>   - commit 532c57f8c3a15b109a46d3e2b14d60a5c40979d5 "Move GNU/Hurd 
>>> startfile spec from config/i386/gnu.h to config/gnu.h"
>>>   - commit 9670a2326333caa8482377c00beb65723b7b4b26 "aarch64: Add support 
>>> for aarch64-gnu (GNU/Hurd on AArch64)"
>>>   - commit 46c91665f4bceba19aed56f5bd6e934c548b84ff "libgcc: Add basic 
>>> support for aarch64-gnu (GNU/Hurd on AArch64)"
>>
>> \o/ Thanks a lot!
>>
>> This will unblock merging the aarch64-gnu glibc port upstream.

\o/


>> I assume the buildbot failure that I just got an email about is
>> unrelated; it's failing on some RISC-V thing.
>
> Sorry if I missed something here, do you have a pointer?


and several more such messages, requesting:

--- a/gcc/config/riscv/riscv.opt.urls
+++ b/gcc/config/riscv/riscv.opt.urls
@@ -89,3 +89,5 @@ UrlSuffix(gcc/RISC-V-Options.html#index-minline-strncmp)
 minline-strlen
 UrlSuffix(gcc/RISC-V-Options.html#index-minline-strlen)
 
+; skipping UrlSuffix for 'mtls-dialect=' due to finding no URLs
+

To be fixed by

"Regenerate opt.urls".


Grüße
 Thomas