mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
a4aebe9365
Only the posix timer system calls use this (when the posix timer support is disabled, which does not actually happen in any normal case), because they had debug code to print out a warning about missing system calls. Get rid of that special case, and just use the standard COND_SYSCALL interface that creates weak system call stubs that return -ENOSYS for when the system call does not exist. This fixes a kCFI issue with the SYS_NI() hackery: CFI failure at int80_emulation+0x67/0xb0 (target: sys_ni_posix_timers+0x0/0x70; expected type: 0xb02b34d9) WARNING: CPU: 0 PID: 48 at int80_emulation+0x67/0xb0 Reported-by: kernel test robot <oliver.sang@intel.com> Reviewed-by: Sami Tolvanen <samitolvanen@google.com> Tested-by: Sami Tolvanen <samitolvanen@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Borislav Petkov <bp@alien8.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
82 lines
3.1 KiB
C
82 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* syscall_wrapper.h - arm64 specific wrappers to syscall definitions
|
|
*
|
|
* Based on arch/x86/include/asm_syscall_wrapper.h
|
|
*/
|
|
|
|
#ifndef __ASM_SYSCALL_WRAPPER_H
|
|
#define __ASM_SYSCALL_WRAPPER_H
|
|
|
|
#include <asm/ptrace.h>
|
|
|
|
#define SC_ARM64_REGS_TO_ARGS(x, ...) \
|
|
__MAP(x,__SC_ARGS \
|
|
,,regs->regs[0],,regs->regs[1],,regs->regs[2] \
|
|
,,regs->regs[3],,regs->regs[4],,regs->regs[5])
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
|
|
#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
|
|
asmlinkage long __arm64_compat_sys##name(const struct pt_regs *regs); \
|
|
ALLOW_ERROR_INJECTION(__arm64_compat_sys##name, ERRNO); \
|
|
static long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
|
|
static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
|
|
asmlinkage long __arm64_compat_sys##name(const struct pt_regs *regs) \
|
|
{ \
|
|
return __se_compat_sys##name(SC_ARM64_REGS_TO_ARGS(x,__VA_ARGS__)); \
|
|
} \
|
|
static long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
|
|
{ \
|
|
return __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__)); \
|
|
} \
|
|
static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
|
|
|
|
#define COMPAT_SYSCALL_DEFINE0(sname) \
|
|
asmlinkage long __arm64_compat_sys_##sname(const struct pt_regs *__unused); \
|
|
ALLOW_ERROR_INJECTION(__arm64_compat_sys_##sname, ERRNO); \
|
|
asmlinkage long __arm64_compat_sys_##sname(const struct pt_regs *__unused)
|
|
|
|
#define COND_SYSCALL_COMPAT(name) \
|
|
asmlinkage long __arm64_compat_sys_##name(const struct pt_regs *regs); \
|
|
asmlinkage long __weak __arm64_compat_sys_##name(const struct pt_regs *regs) \
|
|
{ \
|
|
return sys_ni_syscall(); \
|
|
}
|
|
|
|
#endif /* CONFIG_COMPAT */
|
|
|
|
#define __SYSCALL_DEFINEx(x, name, ...) \
|
|
asmlinkage long __arm64_sys##name(const struct pt_regs *regs); \
|
|
ALLOW_ERROR_INJECTION(__arm64_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 __arm64_sys##name(const struct pt_regs *regs) \
|
|
{ \
|
|
return __se_sys##name(SC_ARM64_REGS_TO_ARGS(x,__VA_ARGS__)); \
|
|
} \
|
|
static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
|
|
{ \
|
|
long ret = __do_sys##name(__MAP(x,__SC_CAST,__VA_ARGS__)); \
|
|
__MAP(x,__SC_TEST,__VA_ARGS__); \
|
|
__PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__)); \
|
|
return ret; \
|
|
} \
|
|
static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
|
|
|
|
#define SYSCALL_DEFINE0(sname) \
|
|
SYSCALL_METADATA(_##sname, 0); \
|
|
asmlinkage long __arm64_sys_##sname(const struct pt_regs *__unused); \
|
|
ALLOW_ERROR_INJECTION(__arm64_sys_##sname, ERRNO); \
|
|
asmlinkage long __arm64_sys_##sname(const struct pt_regs *__unused)
|
|
|
|
#define COND_SYSCALL(name) \
|
|
asmlinkage long __arm64_sys_##name(const struct pt_regs *regs); \
|
|
asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \
|
|
{ \
|
|
return sys_ni_syscall(); \
|
|
}
|
|
|
|
asmlinkage long __arm64_sys_ni_syscall(const struct pt_regs *__unused);
|
|
|
|
#endif /* __ASM_SYSCALL_WRAPPER_H */
|