linux-kernel - Re: 2.6.18-rc7-mm1

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Date:	Thu, 21 Sep 2006 14:07:33 -0700
From:	Mark Haverkamp <markh@...l.org>
To:	Andrew Morton <akpm@...l.org>
Cc:	linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>
Subject: Re: 2.6.18-rc7-mm1

On Tue, 2006-09-19 at 01:28 -0700, Andrew Morton wrote:
> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.18-rc7/2.6.18-rc7-mm1/
> 

> 
> +rename-the-provided-execve-functions-to-kernel_execve-headers-fix.patch
> 
>  Fix rename-the-provided-execve-functions-to-kernel_execve.patch some more
> 

While running cross compile tests for prpmc750 we got the following
error that I think is related to the above patches.


  UPD     include/linux/compile.h
  CC      init/version.o
  LD      init/built-in.o
  LD      vmlinux
init/built-in.o: In function `run_init_process':
main.c:(.text+0x20): undefined reference to `kernel_execve'
init/built-in.o: In function `do_linuxrc':
do_mounts_initrd.c:(.init.text+0x3a98): undefined reference to `kernel_execve'
arch/ppc/kernel/built-in.o: In function `execve':
arch/ppc/kernel/entry.S:(.text+0x24a2): undefined reference to `errno'
arch/ppc/kernel/entry.S:(.text+0x24a6): undefined reference to `errno'
kernel/built-in.o: In function `____call_usermodehelper':
kmod.c:(.text+0x163f8): undefined reference to `kernel_execve'
make: [vmlinux] Error 1 (ignored)
  SYSMAP  System.map
powerpc-750-linux-gnu-nm: 'vmlinux': No such file
make: [vmlinux] Error 1 (ignored)
  MODPOST vmlinux


Here is a patch that fixes the compile errors.  I took the code from
misc_32.S.  

Signed-off-by: Mark Haverkamp <markh@...l.org>

---

--- linux-2.6.17.orig/arch/ppc/kernel/misc.S	2006-09-21 08:43:08.000000000 -0700
+++ linux-2.6.17/arch/ppc/kernel/misc.S	2006-09-21 12:48:56.000000000 -0700
@@ -1030,20 +1030,16 @@
 	addi	r1,r1,16
 	blr
 
+_GLOBAL(kernel_execve)
+	li	r0,__NR_execve
+	sc
+	bnslr
+	neg	r3,r3
+	blr
+
 /*
  * This routine is just here to keep GCC happy - sigh...
  */
 _GLOBAL(__main)
 	blr
 
-#define SYSCALL(name) \
-_GLOBAL(name) \
-	li	r0,__NR_##name; \
-	sc; \
-	bnslr; \
-	lis	r4,errno@ha; \
-	stw	r3,errno@l(r4); \
-	li	r3,-1; \
-	blr
-
-SYSCALL(execve)

-- 
Mark Haverkamp <markh@...l.org>

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