From: Brian Gerst <brgerst@gmail.com>
To: Christoph Hellwig <hch@lst.de>
Cc: Arnd Bergmann <arnd@arndb.de>, Al Viro <viro@zeniv.linux.org.uk>,
Luis Chamberlain <mcgrof@kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
"the arch/x86 maintainers" <x86@kernel.org>,
"open list:BROADCOM NVRAM DRIVER" <linux-mips@vger.kernel.org>,
Parisc List <linux-parisc@vger.kernel.org>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
linux-s390 <linux-s390@vger.kernel.org>,
sparclinux <sparclinux@vger.kernel.org>,
Linux FS-devel Mailing List <linux-fsdevel@vger.kernel.org>,
linux-arch <linux-arch@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 2/6] exec: simplify the compat syscall handling
Date: Mon, 15 Jun 2020 11:33:49 -0400 [thread overview]
Message-ID: <CAMzpN2htYX7s6pmRg-c8qwZL1f1_+sB=ztDG_L=617hWsm-=8g@mail.gmail.com> (raw)
In-Reply-To: <20200615150926.GA17108@lst.de>
On Mon, Jun 15, 2020 at 11:10 AM Christoph Hellwig <hch@lst.de> wrote:
>
> On Mon, Jun 15, 2020 at 04:46:15PM +0200, Arnd Bergmann wrote:
> > How about this one:
> >
> > diff --git a/arch/x86/entry/syscall_x32.c b/arch/x86/entry/syscall_x32.c
> > index 3d8d70d3896c..0ce15807cf54 100644
> > --- a/arch/x86/entry/syscall_x32.c
> > +++ b/arch/x86/entry/syscall_x32.c
> > @@ -16,6 +16,9 @@
> > #undef __SYSCALL_X32
> > #undef __SYSCALL_COMMON
> >
> > +#define __x32_sys_execve __x64_sys_execve
> > +#define __x32_sys_execveat __x64_sys_execveat
> > +
>
>
> arch/x86/entry/syscall_x32.c:19:26: error: ‘__x64_sys_execve’ undeclared here (not in a function); did you mean ‘__x32_sys_execve’?
> 19 | #define __x32_sys_execve __x64_sys_execve
> | ^~~~~~~~~~~~~~~~
> arch/x86/entry/syscall_x32.c:22:39: note: in expansion of macro ‘__x32_sys_execve’
> 22 | #define __SYSCALL_X32(nr, sym) [nr] = __x32_##sym,
> | ^~~~~~
> ./arch/x86/include/generated/asm/syscalls_64.h:344:1: note: in expansion of macro ‘__SYSCALL_X32’
> 344 | __SYSCALL_X32(520, sys_execve)
> | ^~~~~~~~~~~~~
> arch/x86/entry/syscall_x32.c:20:28: error: ‘__x64_sys_execveat’ undeclared here (not in a function); did you mean ‘__x32_sys_execveat’?
> 20 | #define __x32_sys_execveat __x64_sys_execveat
> | ^~~~~~~~~~~~~~~~~~
> arch/x86/entry/syscall_x32.c:22:39: note: in expansion of macro ‘__x32_sys_execveat’
> 22 | #define __SYSCALL_X32(nr, sym) [nr] = __x32_##sym,
> | ^~~~~~
> ./arch/x86/include/generated/asm/syscalls_64.h:369:1: note: in expansion of macro ‘__SYSCALL_X32’
> 369 | __SYSCALL_X32(545, sys_execveat)
> | ^~~~~~~~~~~~~
> make[2]: *** [scripts/Makefile.build:281: arch/x86/entry/syscall_x32.o] Error 1
> make[1]: *** [scripts/Makefile.build:497: arch/x86/entry] Error 2
> make[1]: *** Waiting for unfinished jobs....
> kernel/exit.o: warning: objtool: __x64_sys_exit_group()+0x14: unreachable instruction
> make: *** [Makefile:1764: arch/x86] Error 2
> make: *** Waiting for unfinished jobs....
If you move those aliases above all the __SYSCALL_* defines it will
work, since that will get the forward declaration too. This would be
the simplest workaround.
--
Brian Gerst
next prev parent reply other threads:[~2020-06-15 15:34 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-15 13:00 properly support exec and wait with kernel pointers Christoph Hellwig
2020-06-15 13:00 ` [PATCH 1/6] exec: cleanup the execve wrappers Christoph Hellwig
2020-06-15 13:00 ` [PATCH 2/6] exec: simplify the compat syscall handling Christoph Hellwig
2020-06-15 13:31 ` Arnd Bergmann
2020-06-15 14:12 ` Christoph Hellwig
2020-06-15 14:40 ` Arnd Bergmann
2020-06-15 14:43 ` Christoph Hellwig
2020-06-15 14:46 ` Arnd Bergmann
2020-06-15 15:09 ` Christoph Hellwig
2020-06-15 15:33 ` Brian Gerst [this message]
2020-06-15 16:41 ` Christoph Hellwig
2020-06-15 14:48 ` Brian Gerst
2020-06-15 18:47 ` Arnd Bergmann
2020-06-15 19:45 ` Brian Gerst
2020-06-15 13:00 ` [PATCH 3/6] exec: cleanup the count() function Christoph Hellwig
2020-06-15 13:00 ` [PATCH 4/6] exec: split prepare_arg_pages Christoph Hellwig
2020-06-15 13:00 ` [PATCH 5/6] exec: add a kernel_execveat helper Christoph Hellwig
2020-06-15 13:00 ` [PATCH 6/6] kernel: add a kernel_wait helper Christoph Hellwig
2020-06-15 13:42 ` properly support exec and wait with kernel pointers Arnd Bergmann
2020-06-18 14:46 properly support exec and wait with kernel pointers v2 Christoph Hellwig
2020-06-18 14:46 ` [PATCH 2/6] exec: simplify the compat syscall handling Christoph Hellwig
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