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powerpc: Add TIF_ELF2ABI flag.

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Little endian ppc64 is getting an exciting new ABI.  This is reflected
by the bottom two bits of e_flags in the ELF header:

	0 == legacy binaries (v1 ABI)
	1 == binaries using the old ABI (compiled with a new toolchain)
	2 == binaries using the new ABI.

We store this in a thread flag, because we need to set it in core
dumps and for signal delivery.  Our chief concern is that it doesn't
use function descriptors.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Rusty Russell
2013-11-20 22:15:00 +11:00
committed by Benjamin Herrenschmidt
parent e844b1eeae
commit 373c76d622
2 changed files with 11 additions and 0 deletions
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arch/powerpc/include/asm/elf.h
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@@ -86,6 +86,8 @@ typedef elf_vrregset_t elf_fpxregset_t;
#ifdef __powerpc64__
# define SET_PERSONALITY(ex) \
do { \
if (((ex).e_flags & 0x3) == 2) \
set_thread_flag(TIF_ELF2ABI); \
if ((ex).e_ident[EI_CLASS] == ELFCLASS32) \
set_thread_flag(TIF_32BIT); \
else \