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[PATCH] x86_64: Bring x86-64 ia32 emul in sync with i386 on READ_IMPLIES_EXEC enabling

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Currently ia32 binaries behave differently with respect to enabling
READ_IMPLIES_EXEC.  On i386 a binary with the exec_stack flag set is
executed with READ_IMPLIES_EXEC enabled as well.  The same binary
executes without READ_IMPLIES_EXEC on x86-64.

This causes binaries that work on i386 to fail on x86-64 which goes
somewhat against the whole 32 bit emulation idea.

It has been argued that READ_IMPLIES_EXEC should not be enabled at all
for binaries that have the exec_stack flag.  Which is probably a valid
point.  However until this is clarified I think x86-64 should behave the
same for ia32 binaries as i386.

The following patch brings x86-64 in sync with i386 for ia32 binaries.

Signed-off-by: Markus Schoder <lists@gammarayburst.de>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Markus Schoder 2006-07-10 17:06:06 +02:00 committed by Linus Torvalds
parent d5d8ad78b0
commit 3391c22e5b
1 changed files with 1 additions and 1 deletions
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arch/x86_64/ia32/ia32_binfmt.c
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@ -182,7 +182,7 @@ struct elf_prpsinfo
#define user user32
#define __ASM_X86_64_ELF_H 1
#define elf_read_implies_exec(ex, have_pt_gnu_stack) (!(have_pt_gnu_stack))
#define elf_read_implies_exec(ex, executable_stack) (executable_stack != EXSTACK_DISABLE_X)
//#include <asm/ia32.h>
#include <linux/elf.h>