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Message-ID: <4d52b78d-ed39-102f-ba64-3ba9c17f58f9@gmx.de>
Date:   Tue, 22 Mar 2022 17:16:32 +0100
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Subject: Re: hppa vDSO and compiler (non-)support
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To:     Guenter Roeck <linux@roeck-us.net>
Cc:     Jiri Slaby <jirislaby@kernel.org>, linux-parisc@vger.kernel.org,
        Linux kernel mailing list <linux-kernel@vger.kernel.org>,
        =?UTF-8?Q?Martin_Li=c5=a1ka?= <mliska@suse.cz>,
        Andreas Schwab <schwab@linux-m68k.org>
References: <d2713ae1-0ca5-9e5a-b7d2-b7d0f1f5614a@kernel.org>
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 <28696c20-21ad-b0ac-8093-4ce07225fcd8@kernel.org>
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 <78abe69b-7914-1b38-c94e-7143f61f4909@roeck-us.net>
From:   Helge Deller <deller@gmx.de>
In-Reply-To: <78abe69b-7914-1b38-c94e-7143f61f4909@roeck-us.net>
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On 3/22/22 16:19, Guenter Roeck wrote:
> On 3/22/22 07:25, Helge Deller wrote:
>> On 3/22/22 14:05, Guenter Roeck wrote:
>>> Does that also fix the build problems now seen in mainline ?
>>
>> No.
>>
>>> Building parisc64:generic-64bit_defconfig ... failed
>>> --------------
>>> Error log:
>>> arch/parisc/kernel/vdso64/Makefile:30: FORCE prerequisite is missing
>>> arch/parisc/kernel/vdso32/sigtramp.S: Assembler messages:
>>> arch/parisc/kernel/vdso32/sigtramp.S:39: Error: unknown pseudo-op: `.p=
roc'
>>> ...
>>> arch/parisc/kernel/vdso32/restart_syscall.S:32: Error: .cfi_endproc wi=
thout corresponding .cfi_startproc
>>> make[2]: *** [arch/parisc/kernel/vdso32/Makefile:34: arch/parisc/kerne=
l/vdso32/restart_syscall.o] Error 1
>>> make[2]: *** Waiting for unfinished jobs....
>>> make[2]: *** [arch/parisc/kernel/vdso32/Makefile:34: arch/parisc/kerne=
l/vdso32/sigtramp.o] Error 1
>>> make[1]: *** [arch/parisc/Makefile:177: vdso_prepare] Error 2
>>> make: *** [Makefile:219: __sub-make] Error 2
>>>
>>> This is with hppa64-linux-gcc (GCC) 11.2.0.
>>
>> Can you check if you have the 32-bit compiler (hppa-linux-gcc) installe=
d too?
>> The errors above happen when building the 32-bit vDSO, for which you ne=
ed the 32-bit compiler.
>>
>
> Yes, I do, but that doesn't help much if I want to build a 64-bit target=
 such
> as generic-64bit_defconfig. Am I missing something ?

The 64-bit PA-RISC kernel now includes a built-in a 32-bit and a 64-bit vD=
SO for userspace.
To build the 32-bit vDSO (vdso32) you need the 32-bit hppa compiler instal=
led.
That's what's being done above - see the path: arch/parisc/kernel/vdso32/
Can you try "make V=3D1" to see the command line?

Helge