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Date: Sun, 15 May 2022 12:25:47 +0900
From: Stafford Horne <shorne@...il.com>
To: Florian Fainelli <f.fainelli@...il.com>
Cc: buildroot@...ldroot.org,
Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
mmayer@...adcom.com, yann.morin.1998@...e.fr,
musl@...ts.openwall.com
Subject: Re: [Buildroot] [PATCH] package/cpulimit: Disable build on OpenRISC
with musl-libc
On Sat, May 14, 2022 at 07:14:21PM -0700, Florian Fainelli wrote:
>
>
> On 5/14/2022 7:09 PM, Stafford Horne wrote:
> > On Tue, May 10, 2022 at 05:19:47PM -0700, Florian Fainelli wrote:
> > > As reported in the following autobuild report:
> > >
> > > http://autobuild.buildroot.net/results/2a9cf20949beac46d1c689df2c5b7ab0d59c08b5/
> > >
> > > cpulimit does not build due to a lack of definition for elf_gregset_t
> > > which is not currently provided in the or1k musl-libc port. While this
> > > is being worked on, disable the build for or1k and musl-libc.
> >
> > Hello,
> >
> > You mention this is being worked on. I am curious who is working on this?
> >
> > I try to look over OpenRISC stuff, do you need me to do anything on musl for
> > this?
>
> I posted this:
>
> https://www.openwall.com/lists/musl/2022/05/10/1
>
> if you don't mind reviewing, thanks!
No problem, I don't have the mail in my inbox, I've subscribed to musl now.
Put some comments below based on what I had configured in glibc.
diff --git a/arch/or1k/bits/user.h b/arch/or1k/bits/user.h
index e69de29bb2d1..3405bf771c0f 100644
--- a/arch/or1k/bits/user.h
+++ b/arch/or1k/bits/user.h
@@ -0,0 +1,11 @@
+struct user_regs {
+ unsigned long gpr[32];
+ unsigned long pc;
+ unsigned long sr;
+};
OK, matches glibc.
+#define ELF_NGREG 34
In glibc we define this as 32. Howerver, we define elf_gregset_t as
elf_gregset_t[34]. I don't see where ELF_NGREG is really used so I am
not sure of the impact to this. I also can't remember why I set these
different in glibc.
+typedef unsigned long elf_greg_t, elf_gregset_t[ELF_NGREG];
+
+/* or32 does not have floating point support, placeholder */
+typedef unsigned long elf_fpregset_t;
OpenRISC uses the same registers and floating point and integer. This is defined
in glibc as:
/* Register set for the floating-point registers. */
typedef elf_greg_t elf_fpregset_t[32];
-Stafford
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