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x86/entry: Refactor SYS_NI macros 

Pull the common code out from the SYS_NI macros into a new __SYS_NI macro.
Also conditionalize the X64 version in preparation for enabling syscall
wrappers on 32-bit native kernels.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Dominik Brodowski <linux@dominikbrodowski.net>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/20200313195144.164260-5-brgerst@gmail.com
This commit is contained in:
Brian Gerst 2020-03-13 15:51:30 -04:00 committed by Thomas Gleixner
parent 6cc8d2b286
commit a74d187c2d
1 changed files with 23 additions and 9 deletions
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32
arch/x86/include/asm/syscall_wrapper.h
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@ -42,6 +42,9 @@ struct pt_regs;
return sys_ni_syscall(); \
}
#define __SYS_NI(abi, name) \
SYSCALL_ALIAS(__##abi##_##name, sys_ni_posix_timers)
#ifdef CONFIG_X86_64
#define __X64_SYS_STUB0(name) \
__SYS_STUB0(x64, sys_##name)
@ -52,10 +55,14 @@ struct pt_regs;
#define __X64_COND_SYSCALL(name) \
__COND_SYSCALL(x64, sys_##name)
#define __X64_SYS_NI(name) \
__SYS_NI(x64, sys_##name)
#else /* CONFIG_X86_64 */
#define __X64_SYS_STUB0(name)
#define __X64_SYS_STUBx(x, name, ...)
#define __X64_COND_SYSCALL(name)
#define __X64_SYS_NI(name)
#endif /* CONFIG_X86_64 */
#ifdef CONFIG_IA32_EMULATION
@ -77,6 +84,9 @@ struct pt_regs;
#define __IA32_COMPAT_COND_SYSCALL(name) \
__COND_SYSCALL(ia32, compat_sys_##name)
#define __IA32_COMPAT_SYS_NI(name) \
__SYS_NI(ia32, compat_sys_##name)
#define __IA32_SYS_STUB0(name) \
__SYS_STUB0(ia32, sys_##name)
@ -87,17 +97,17 @@ struct pt_regs;
#define __IA32_COND_SYSCALL(name) \
__COND_SYSCALL(ia32, sys_##name)
#define SYS_NI(name) \
SYSCALL_ALIAS(__x64_sys_##name, sys_ni_posix_timers); \
SYSCALL_ALIAS(__ia32_sys_##name, sys_ni_posix_timers)
#define __IA32_SYS_NI(name) \
__SYS_NI(ia32, sys_##name)
#else /* CONFIG_IA32_EMULATION */
#define __IA32_COMPAT_SYS_STUB0(name)
#define __IA32_COMPAT_SYS_STUBx(x, name, ...)
#define __IA32_COMPAT_COND_SYSCALL(name)
#define __IA32_COMPAT_SYS_NI(name)
#define __IA32_SYS_STUB0(name)
#define __IA32_SYS_STUBx(x, name, ...)
#define __IA32_COND_SYSCALL(name)
#define __IA32_SYS_NI(name)
#endif /* CONFIG_IA32_EMULATION */
@ -116,10 +126,14 @@ struct pt_regs;
#define __X32_COMPAT_COND_SYSCALL(name) \
__COND_SYSCALL(x32, compat_sys_##name)
#define __X32_COMPAT_SYS_NI(name) \
__SYS_NI(x32, compat_sys_##name)
#else /* CONFIG_X86_X32 */
#define __X32_COMPAT_SYS_STUB0(name)
#define __X32_COMPAT_SYS_STUBx(x, name, ...)
#define __X32_COMPAT_COND_SYSCALL(name)
#define __X32_COMPAT_SYS_NI(name)
#endif /* CONFIG_X86_X32 */
@ -158,8 +172,8 @@ struct pt_regs;
__X32_COMPAT_COND_SYSCALL(name)
#define COMPAT_SYS_NI(name) \
SYSCALL_ALIAS(__ia32_compat_sys_##name, sys_ni_posix_timers); \
SYSCALL_ALIAS(__x32_compat_sys_##name, sys_ni_posix_timers)
__IA32_COMPAT_SYS_NI(name) \
__X32_COMPAT_SYS_NI(name)
#endif /* CONFIG_COMPAT */
@ -231,9 +245,9 @@ struct pt_regs;
__X64_COND_SYSCALL(name) \
__IA32_COND_SYSCALL(name)
#ifndef SYS_NI
#define SYS_NI(name) SYSCALL_ALIAS(__x64_sys_##name, sys_ni_posix_timers);
#endif
#define SYS_NI(name) \
__X64_SYS_NI(name) \
__IA32_SYS_NI(name)
/*