From: Michael Ellerman <mpe@ellerman.id.au>
To: Anton Blanchard <anton@samba.org>
Cc: rusty@rustcorp.com.au, Ulrich.Weigand@de.ibm.com,
paulus@samba.org, alistair@popple.id.au,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH 3/9] powerpc: Add TIF_ELF2ABI flag.
Date: Thu, 21 Nov 2013 22:55:03 +1100 [thread overview]
Message-ID: <20131121115503.GD15913@concordia> (raw)
In-Reply-To: <1384946106-18200-4-git-send-email-anton@samba.org>
On Wed, Nov 20, 2013 at 10:15:00PM +1100, Anton Blanchard wrote:
> From: Rusty Russell <rusty@rustcorp.com.au>
>
> 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.
Just to be ridiculously clear for stupid people like me, you refer here
to the "v1 ABI" and "the old ABI" - they are the same thing - right?
> diff --git a/arch/powerpc/include/asm/thread_info.h b/arch/powerpc/include/asm/thread_info.h
> index ba7b197..05a3030 100644
> --- a/arch/powerpc/include/asm/thread_info.h
> +++ b/arch/powerpc/include/asm/thread_info.h
> @@ -107,6 +107,9 @@ static inline struct thread_info *current_thread_info(void)
> #define TIF_EMULATE_STACK_STORE 16 /* Is an instruction emulation
> for stack store? */
> #define TIF_MEMDIE 17 /* is terminating due to OOM killer */
> +#if defined(CONFIG_PPC64)
> +#define TIF_ELF2ABI 18 /* function descriptors must die! */
> +#endif
This is the first TIF flag we #ifdef for 32 vs 64, is that just because
we don't want to waste a flag on 32 bit?
cheers
next prev parent reply other threads:[~2013-11-21 11:55 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-20 11:14 [PATCH 0/9] ppc64 little endian updates Anton Blanchard
2013-11-20 11:14 ` [PATCH 1/9] powerpc/pseries: Fix endian issues in pseries EEH code Anton Blanchard
2013-11-20 11:14 ` [PATCH 2/9] pseries: Add H_SET_MODE to change exception endianness Anton Blanchard
2013-11-21 11:51 ` Michael Ellerman
2013-11-20 11:15 ` [PATCH 3/9] powerpc: Add TIF_ELF2ABI flag Anton Blanchard
2013-11-21 11:55 ` Michael Ellerman [this message]
2013-12-01 10:30 ` Rusty Russell
2013-11-20 11:15 ` [PATCH 4/9] powerpc: Set eflags correctly for ELF ABIv2 core dumps Anton Blanchard
2013-11-21 11:58 ` Michael Ellerman
2013-11-20 11:15 ` [PATCH 5/9] powerpc: ELF2 binaries launched directly Anton Blanchard
2013-11-20 11:15 ` [PATCH 6/9] powerpc: ELF2 binaries signal handling Anton Blanchard
2013-11-20 11:15 ` [PATCH 7/9] powerpc: Don't use ELFv2 ABI to build the kernel Anton Blanchard
2013-11-20 11:15 ` [PATCH 8/9] powerpc: Add CONFIG_CPU_LITTLE_ENDIAN kernel config option Anton Blanchard
2013-11-21 12:05 ` Michael Ellerman
2013-11-20 11:15 ` [PATCH 9/9] powerpc: Add pseries_le_defconfig Anton Blanchard
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