[SPARC]: Handle UNWIND_INFO properly.

For sparc32 we need R_SPARC_UA32 relocation support, for
sparc64 we need the handle R_SPARC_DISP32 relocations.

Based upon reports and initial patch by Martin Habets.
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/kernel/module.c

@@ -113,6 +113,7 @@ int apply_relocate_add(Elf32_Shdr *sechdrs,
 
 		switch (ELF32_R_TYPE(rel[i].r_info)) {
 		case R_SPARC_32:
+		case R_SPARC_UA32:
 			location[0] = v >> 24;
 			location[1] = v >> 16;
 			location[2] = v >>  8;

arch/sparc64/defconfig

 #
 # Automatically generated make config: don't edit
 # Linux kernel version: 2.6.17-rc3
-# Mon May  8 15:12:53 2006
+# Fri May 12 12:43:49 2006
 #
 CONFIG_SPARC=y
 CONFIG_SPARC64=y
@@ -1309,6 +1309,7 @@ CONFIG_DEBUG_BUGVERBOSE=y
 # CONFIG_DEBUG_INFO is not set
 CONFIG_DEBUG_FS=y
 # CONFIG_DEBUG_VM is not set
+# CONFIG_UNWIND_INFO is not set
 CONFIG_FORCED_INLINING=y
 # CONFIG_RCU_TORTURE_TEST is not set
 # CONFIG_DEBUG_STACK_USAGE is not set

arch/sparc64/kernel/module.c

@@ -143,6 +143,11 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
 			location[3] = v >>  0;
 			break;
 
+		case R_SPARC_DISP32:
+			v -= (Elf64_Addr) location;
+			*loc32 = v;
+			break;
+
 		case R_SPARC_WDISP30:
 			v -= (Elf64_Addr) location;
 			*loc32 = (*loc32 & ~0x3fffffff) |

lib/Kconfig.debug

@@ -189,7 +189,7 @@ config FRAME_POINTER
 config UNWIND_INFO
 	bool "Compile the kernel with frame unwind information"
 	depends on !IA64
-	depends on !MODULES || !(MIPS || PARISC || PPC || SUPERH || SPARC64 || V850)
+	depends on !MODULES || !(MIPS || PARISC || PPC || SUPERH || V850)
 	help
 	  If you say Y here the resulting kernel image will be slightly larger
 	  but not slower, and it will give very useful debugging information.