diff options
| author | Brian Gerst <brgerst@gmail.com> | 2020-03-13 22:51:27 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-03-21 18:03:18 +0300 |
| commit | 4399e0cf494f739af7e0648f52fe43311ecd1bea (patch) | |
| tree | 19c723c4e3122020c1e7b6faaa4040aea0b7d737 /arch/x86/include/asm/syscall_wrapper.h | |
| parent | 810f80a61be8c1d4a574082737f7a18c7459fa7b (diff) | |
| download | linux-4399e0cf494f739af7e0648f52fe43311ecd1bea.tar.xz | |
x86/entry: Refactor SYSCALL_DEFINEx macros
Pull the common code out from the SYSCALL_DEFINEx macros into a new
__SYS_STUBx 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/20200313195144.164260-2-brgerst@gmail.com
Diffstat (limited to 'arch/x86/include/asm/syscall_wrapper.h')
| -rw-r--r-- | arch/x86/include/asm/syscall_wrapper.h | 49 |
1 files changed, 24 insertions, 25 deletions
diff --git a/arch/x86/include/asm/syscall_wrapper.h b/arch/x86/include/asm/syscall_wrapper.h index e2389ce9bf58..a1c090bde063 100644 --- a/arch/x86/include/asm/syscall_wrapper.h +++ b/arch/x86/include/asm/syscall_wrapper.h @@ -21,6 +21,22 @@ struct pt_regs; ,,(unsigned int)regs->dx,,(unsigned int)regs->si \ ,,(unsigned int)regs->di,,(unsigned int)regs->bp) +#define __SYS_STUBx(abi, name, ...) \ + asmlinkage long __##abi##_##name(const struct pt_regs *regs); \ + ALLOW_ERROR_INJECTION(__##abi##_##name, ERRNO); \ + asmlinkage long __##abi##_##name(const struct pt_regs *regs) \ + { \ + return __se_##name(__VA_ARGS__); \ + } + +#ifdef CONFIG_X86_64 +#define __X64_SYS_STUBx(x, name, ...) \ + __SYS_STUBx(x64, sys##name, \ + SC_X86_64_REGS_TO_ARGS(x, __VA_ARGS__)) +#else /* CONFIG_X86_64 */ +#define __X64_SYS_STUBx(x, name, ...) +#endif /* CONFIG_X86_64 */ + #ifdef CONFIG_IA32_EMULATION /* * For IA32 emulation, we need to handle "compat" syscalls *and* create @@ -39,20 +55,12 @@ struct pt_regs; } #define __IA32_COMPAT_SYS_STUBx(x, name, ...) \ - asmlinkage long __ia32_compat_sys##name(const struct pt_regs *regs);\ - ALLOW_ERROR_INJECTION(__ia32_compat_sys##name, ERRNO); \ - asmlinkage long __ia32_compat_sys##name(const struct pt_regs *regs)\ - { \ - return __se_compat_sys##name(SC_IA32_REGS_TO_ARGS(x,__VA_ARGS__));\ - } + __SYS_STUBx(ia32, compat_sys##name, \ + SC_IA32_REGS_TO_ARGS(x, __VA_ARGS__)) #define __IA32_SYS_STUBx(x, name, ...) \ - asmlinkage long __ia32_sys##name(const struct pt_regs *regs); \ - ALLOW_ERROR_INJECTION(__ia32_sys##name, ERRNO); \ - asmlinkage long __ia32_sys##name(const struct pt_regs *regs) \ - { \ - return __se_sys##name(SC_IA32_REGS_TO_ARGS(x,__VA_ARGS__));\ - } + __SYS_STUBx(ia32, sys##name, \ + SC_IA32_REGS_TO_ARGS(x, __VA_ARGS__)) /* * To keep the naming coherent, re-define SYSCALL_DEFINE0 to create an alias @@ -82,7 +90,7 @@ struct pt_regs; #else /* CONFIG_IA32_EMULATION */ #define __IA32_COMPAT_SYS_STUBx(x, name, ...) -#define __IA32_SYS_STUBx(x, fullname, name, ...) +#define __IA32_SYS_STUBx(x, name, ...) #endif /* CONFIG_IA32_EMULATION */ @@ -101,12 +109,8 @@ struct pt_regs; } #define __X32_COMPAT_SYS_STUBx(x, name, ...) \ - asmlinkage long __x32_compat_sys##name(const struct pt_regs *regs);\ - ALLOW_ERROR_INJECTION(__x32_compat_sys##name, ERRNO); \ - asmlinkage long __x32_compat_sys##name(const struct pt_regs *regs)\ - { \ - return __se_compat_sys##name(SC_X86_64_REGS_TO_ARGS(x,__VA_ARGS__));\ - } + __SYS_STUBx(x32, compat_sys##name, \ + SC_X86_64_REGS_TO_ARGS(x, __VA_ARGS__)) #else /* CONFIG_X86_X32 */ #define __X32_COMPAT_SYS_STUB0(x, name) @@ -192,14 +196,9 @@ struct pt_regs; * to the i386 calling convention (bx, cx, dx, si, di, bp). */ #define __SYSCALL_DEFINEx(x, name, ...) \ - asmlinkage long __x64_sys##name(const struct pt_regs *regs); \ - ALLOW_ERROR_INJECTION(__x64_sys##name, ERRNO); \ static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \ static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\ - asmlinkage long __x64_sys##name(const struct pt_regs *regs) \ - { \ - return __se_sys##name(SC_X86_64_REGS_TO_ARGS(x,__VA_ARGS__));\ - } \ + __X64_SYS_STUBx(x, name, __VA_ARGS__) \ __IA32_SYS_STUBx(x, name, __VA_ARGS__) \ static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \ { \ |