kernel/arch/powerpc/include/uapi/asm/elf.h, branch linux-4.3.y

powerpc/module: Handle R_PPC64_ENTRY relocations

2016-01-31T19:25:53Z

commit a61674bdfc7c2bf909c4010699607b62b69b7bec upstream. GCC 6 will include changes to generated code with -mcmodel=large, which is used to build kernel modules on powerpc64le. This was necessary because the large model is supposed to allow arbitrary sizes and locations of the code and data sections, but the ELFv2 global entry point prolog still made the unconditional assumption that the TOC associated with any particular function can be found within 2 GB of the function entry point: func: addis r2,r12,(.TOC.-func)@ha addi r2,r2,(.TOC.-func)@l .localentry func, .-func To remove this assumption, GCC will now generate instead this global entry point prolog sequence when using -mcmodel=large: .quad .TOC.-func func: .reloc ., R_PPC64_ENTRY ld r2, -8(r12) add r2, r2, r12 .localentry func, .-func The new .reloc triggers an optimization in the linker that will replace this new prolog with the original code (see above) if the linker determines that the distance between .TOC. and func is in range after all. Since this new relocation is now present in module object files, the kernel module loader is required to handle them too. This patch adds support for the new relocation and implements the same optimization done by the GNU linker. Signed-off-by: Ulrich Weigand Signed-off-by: Michael Ellerman Signed-off-by: Greg Kroah-Hartman

powerpc: Handle new ELFv2 module relocations

2014-04-23T00:05:29Z

The new ELF ABI tends to use R_PPC64_REL16_LO and R_PPC64_REL16_HA relocations (PC-relative), so implement them. Signed-off-by: Rusty Russell

powerpc: modules implement R_PPC64_TOCSAVE relocation.

2014-04-23T00:05:28Z

Signed-off-by: Rusty Russell

powerpc: Fix little endian coredumps

2013-08-14T05:33:39Z

We need to set ELF_DATA correctly on LE coredumps. Signed-off-by: Anton Blanchard Signed-off-by: Benjamin Herrenschmidt

powerpc: Simplify logic in include/uapi/asm/elf.h

2013-08-14T01:50:22Z

Simplify things by putting all the 32bit and 64bit defines together instead of in two spots. Signed-off-by: Anton Blanchard Signed-off-by: Benjamin Herrenschmidt

UAPI: (Scripted) Disintegrate arch/powerpc/include/asm

2012-10-09T08:47:26Z

Signed-off-by: David Howells Acked-by: Arnd Bergmann Acked-by: Thomas Gleixner Acked-by: Michael Kerrisk Acked-by: Paul E. McKenney Acked-by: Dave Jones