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Re: [PATCH] Support SHF_GNU_MBIND and PT_GNU_MBIND_XXX
- From: Alan Modra <amodra at gmail dot com>
- To: "H.J. Lu" <hjl dot tools at gmail dot com>
- Cc: binutils at sourceware dot org
- Date: Fri, 17 Mar 2017 14:08:36 +1030
- Subject: Re: [PATCH] Support SHF_GNU_MBIND and PT_GNU_MBIND_XXX
- Authentication-results: sourceware.org; auth=none
- References: <20170315224617.GA23626@intel.com>
On Wed, Mar 15, 2017 at 03:46:17PM -0700, H.J. Lu wrote:
> Any comments?
Doesn't pass my sniff test.
You say that management of special memory regions doesn't belong in
the kernel or glibc, but will be handled by a vendor supplied
library. In that case, why must ld.so run your magic
__gnu_mbind_setup function? If ld.so doesn't need to run
__gnu_mbind_setup then there's no need to pass information to ld.so
via special segment types and flags.
Just have the application call __gnu_mbind_setup. The function
can take the address range(s) requested as a parameter rather than
putting them into the executable headers. It shouldn't be difficult
for the linker to arrange such a call on application startup.
Australia Development Lab, IBM