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x32: Handle process creation

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Allow an x32 process to be started.

Originally-by: H. J. Lu <hjl.tools@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
This commit is contained in:
H. Peter Anvin
2012-02-19 10:06:34 -08:00
parent c5a373942b
commit d1a797f388
5 changed files with 79 additions and 14 deletions
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25
arch/x86/include/asm/elf.h
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@@ -156,7 +156,12 @@ do { \
#define elf_check_arch(x) \
((x)->e_machine == EM_X86_64)
#define compat_elf_check_arch(x) elf_check_arch_ia32(x)
#define compat_elf_check_arch(x) \
(elf_check_arch_ia32(x) || (x)->e_machine == EM_X86_64)
#if __USER32_DS != __USER_DS
# error "The following code assumes __USER32_DS == __USER_DS"
#endif
static inline void elf_common_init(struct thread_struct *t,
struct pt_regs *regs, const u16 ds)
@@ -179,8 +184,9 @@ static inline void elf_common_init(struct thread_struct *t,
void start_thread_ia32(struct pt_regs *regs, u32 new_ip, u32 new_sp);
#define compat_start_thread start_thread_ia32
void set_personality_ia32(void);
#define COMPAT_SET_PERSONALITY(ex) set_personality_ia32()
void set_personality_ia32(bool);
#define COMPAT_SET_PERSONALITY(ex) \
set_personality_ia32((ex).e_machine == EM_X86_64)
#define COMPAT_ELF_PLATFORM ("i686")
@@ -296,9 +302,20 @@ do { \
(unsigned long)current->mm->context.vdso); \
} while (0)
#define ARCH_DLINFO_X32 \
do { \
if (vdso_enabled) \
NEW_AUX_ENT(AT_SYSINFO_EHDR, \
(unsigned long)current->mm->context.vdso); \
} while (0)
#define AT_SYSINFO 32
#define COMPAT_ARCH_DLINFO ARCH_DLINFO_IA32(sysctl_vsyscall32)
#define COMPAT_ARCH_DLINFO \
if (test_thread_flag(TIF_X32)) \
ARCH_DLINFO_X32; \
else \
ARCH_DLINFO_IA32(sysctl_vsyscall32)
#define COMPAT_ELF_ET_DYN_BASE (TASK_UNMAPPED_BASE + 0x1000000)