Re: [PATCH] CONFIG_UNWIND_INFO

[Paul Mackerras <paulus@samba.org>]

Andrew Morton writes:

> If you do a `make oldconfig' with CONFIG_DEBUG_KERNEL you get
> -fasynchronous-unwind-tables and (on my yellowdog-4 toolchain at least) the
> ppc64 kernel doesn't like that one bit. 
> 
> 
> EXT3-fs: mounted filesystem with ordered data mode.
> ADDRCONF(NETDEV_UP): eth0: link is not ready
> tg3: eth0: Link is up at 100 Mbps, full duplex.
> tg3: eth0: Flow control is off for TX and off for RX.
> ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
> autofs: Unknown ADD relocation: 44
> sunrpc: Unknown ADD relocation: 44

We aren't handling R_PPC64_REL64 relocations in our module code.  This
patch (completely untested :) might help.

Paul.

diff --git a/arch/powerpc/kernel/module_64.c b/arch/powerpc/kernel/module_64.c
index 928b858..4885f39 100644
--- a/arch/powerpc/kernel/module_64.c
+++ b/arch/powerpc/kernel/module_64.c
@@ -337,6 +337,10 @@ int apply_relocate_add(Elf64_Shdr *sechd
 			*(unsigned long *)location = value;
 			break;
 
+		case R_PPC64_REL64:
+			*location = value - (unsigned long) location;
+			break;
+
 		case R_PPC64_TOC:
 			*(unsigned long *)location = my_r2(sechdrs, me);
 			break;