From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 14888DDEDA for ; Tue, 28 Apr 2009 23:08:47 +1000 (EST) Date: Tue, 28 Apr 2009 08:08:40 -0500 (CDT) From: Kumar Gala To: Paul Mackerras Subject: [PATCH] powerpc: Fix up elf_read_implies_exec() usage Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Cc: linuxppc-dev@ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On ppc64 we implemented elf_read_implies_exec() for 32-bit binaries because old toolchains had bugs with regards to marking PHDRs as executable that needed to be. For some reason we didn't do this on ppc32 builds. This hadn't been an issue until recent changes to I$/D$ handling that impacted the per-page exec handling on embedded PPC. Additionally we believe if a toolchain supported PT_GNU_STACK that it sets the proper PHDR permissions so we only have elf_read_implies_exec() true if we don't see PT_GNU_STACK set. Signed-off-by: Kumar Gala --- Paul, please pick this up for 2.6.30 and send onto linus. - k arch/powerpc/include/asm/elf.h | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/arch/powerpc/include/asm/elf.h b/arch/powerpc/include/asm/elf.h index 087c22f..014a624 100644 --- a/arch/powerpc/include/asm/elf.h +++ b/arch/powerpc/include/asm/elf.h @@ -256,10 +256,11 @@ do { \ * even if we have an executable stack. */ # define elf_read_implies_exec(ex, exec_stk) (test_thread_flag(TIF_32BIT) ? \ - (exec_stk != EXSTACK_DISABLE_X) : 0) + (exec_stk == EXSTACK_DEFAULT) : 0) #else # define SET_PERSONALITY(ex) \ set_personality(PER_LINUX | (current->personality & (~PER_MASK))) +# define elf_read_implies_exec(ex, exec_stk) (exec_stk == EXSTACK_DEFAULT) #endif /* __powerpc64__ */ extern int dcache_bsize; -- 1.6.0.6