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x86: Factor out TIF_IA32 from 32-bit address space

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Factor out IA32 (compatibility instruction set) from 32-bit address
space in the thread_info flags; this is a precondition patch for x32
support.

Originally-by: H. J. Lu <hjl.tools@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Link: http://lkml.kernel.org/n/tip-4pr1xnnksprt7t0h3w5fw4rv@git.kernel.org
This commit is contained in:
H. Peter Anvin 2012-02-06 13:03:09 -08:00
parent cf420048b3
commit 6bd330083e
6 changed files with 13 additions and 9 deletions
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4
arch/x86/include/asm/elf.h
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@ -287,7 +287,7 @@ do { \
#define VDSO_HIGH_BASE 0xffffe000U /* CONFIG_COMPAT_VDSO address */
/* 1GB for 64bit, 8MB for 32bit */
#define STACK_RND_MASK (test_thread_flag(TIF_IA32) ? 0x7ff : 0x3fffff)
#define STACK_RND_MASK (test_thread_flag(TIF_ADDR32) ? 0x7ff : 0x3fffff)
#define ARCH_DLINFO \
do { \
@ -330,7 +330,7 @@ static inline int mmap_is_ia32(void)
return 1;
#endif
#ifdef CONFIG_IA32_EMULATION
if (test_thread_flag(TIF_IA32))
if (test_thread_flag(TIF_ADDR32))
return 1;
#endif
return 0;