1 files changed, 80 insertions, 0 deletions

diff --git a/recipes-kernel/linux/files/powerpc-Fix-64-bit-builds-with-binutils-2.24.patch b/recipes-kernel/linux/files/powerpc-Fix-64-bit-builds-with-binutils-2.24.patch
new file mode 100644
index 0000000..2fdcc9f
--- /dev/null
+++ b/recipes-kernel/linux/files/powerpc-Fix-64-bit-builds-with-binutils-2.24.patch
@@ -0,0 +1,80 @@
+From 7998eb3dc700aaf499f93f50b3d77da834ef9e1d Mon Sep 17 00:00:00 2001
+From: Guenter Roeck <linux@roeck-us.net>
+Date: Thu, 15 May 2014 09:33:42 -0700
+Subject: powerpc: Fix 64 bit builds with binutils 2.24
+
+Upstream-Status: Backport
+
+With binutils 2.24, various 64 bit builds fail with relocation errors
+such as
+
+arch/powerpc/kernel/built-in.o: In function `exc_debug_crit_book3e':
+        (.text+0x165ee): relocation truncated to fit: R_PPC64_ADDR16_HI
+        against symbol `interrupt_base_book3e' defined in .text section
+        in arch/powerpc/kernel/built-in.o
+arch/powerpc/kernel/built-in.o: In function `exc_debug_crit_book3e':
+        (.text+0x16602): relocation truncated to fit: R_PPC64_ADDR16_HI
+        against symbol `interrupt_end_book3e' defined in .text section
+        in arch/powerpc/kernel/built-in.o
+
+The assembler maintainer says:
+
+ I changed the ABI, something that had to be done but unfortunately
+ happens to break the booke kernel code.  When building up a 64-bit
+ value with lis, ori, shl, oris, ori or similar sequences, you now
+ should use @high and @higha in place of @h and @ha.  @h and @ha
+ (and their associated relocs R_PPC64_ADDR16_HI and R_PPC64_ADDR16_HA)
+ now report overflow if the value is out of 32-bit signed range.
+ ie. @h and @ha assume you're building a 32-bit value. This is needed
+ to report out-of-range -mcmodel=medium toc pointer offsets in @toc@h
+ and @toc@ha expressions, and for consistency I did the same for all
+ other @h and @ha relocs.
+
+Replacing @h with @high in one strategic location fixes the relocation
+errors. This has to be done conditionally since the assembler either
+supports @h or @high but not both.
+
+Cc: <stable@vger.kernel.org>
+Signed-off-by: Guenter Roeck <linux@roeck-us.net>
+Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
+
+diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
+index 4c0cedf..ce4c68a 100644
+--- a/arch/powerpc/Makefile
++++ b/arch/powerpc/Makefile
+@@ -150,7 +150,9 @@ endif
+ 
+ CFLAGS-$(CONFIG_TUNE_CELL) += $(call cc-option,-mtune=cell)
+ 
+-KBUILD_CPPFLAGS        += -Iarch/$(ARCH)
++asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
++
++KBUILD_CPPFLAGS        += -Iarch/$(ARCH) $(asinstr)
+ KBUILD_AFLAGS  += -Iarch/$(ARCH)
+ KBUILD_CFLAGS  += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y)
+ CPP            = $(CC) -E $(KBUILD_CFLAGS)
+diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h
+index 6586a40..cded7c1 100644
+--- a/arch/powerpc/include/asm/ppc_asm.h
++++ b/arch/powerpc/include/asm/ppc_asm.h
+@@ -318,11 +318,16 @@ n:
+        addi    reg,reg,(name - 0b)@l;
+ 
+ #ifdef __powerpc64__
++#ifdef HAVE_AS_ATHIGH
++#define __AS_ATHIGH high
++#else
++#define __AS_ATHIGH h
++#endif
+ #define LOAD_REG_IMMEDIATE(reg,expr)           \
+        lis     reg,(expr)@highest;             \
+        ori     reg,reg,(expr)@higher;  \
+        rldicr  reg,reg,32,31;          \
+-       oris    reg,reg,(expr)@h;               \
++       oris    reg,reg,(expr)@__AS_ATHIGH;     \
+        ori     reg,reg,(expr)@l;
+ 
+ #define LOAD_REG_ADDR(reg,name)                        \
+-- 
+cgit v0.10.1
+