[linux-2.6-block.git] / arch / powerpc / include / asm / syscall_wrapper.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * syscall_wrapper.h - powerpc specific wrappers to syscall definitions
 *
 * Based on arch/{x86,arm64}/include/asm/syscall_wrapper.h
 */

#ifndef __ASM_POWERPC_SYSCALL_WRAPPER_H
#define __ASM_POWERPC_SYSCALL_WRAPPER_H

struct pt_regs;

#define SC_POWERPC_REGS_TO_ARGS(x, ...)				\
	__MAP(x,__SC_ARGS					\
	      ,,regs->gpr[3],,regs->gpr[4],,regs->gpr[5]	\
	      ,,regs->gpr[6],,regs->gpr[7],,regs->gpr[8])

#define __SYSCALL_DEFINEx(x, name, ...)						\
	long sys##name(const struct pt_regs *regs);			\
	ALLOW_ERROR_INJECTION(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__));	\
	long sys##name(const struct pt_regs *regs)			\
	{									\
		return __se_sys##name(SC_POWERPC_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);						\
	long sys_##sname(const struct pt_regs *__unused);		\
	ALLOW_ERROR_INJECTION(sys_##sname, ERRNO);			\
	long sys_##sname(const struct pt_regs *__unused)

#define COND_SYSCALL(name)							\
	long sys_##name(const struct pt_regs *regs);			\
	long __weak sys_##name(const struct pt_regs *regs)		\
	{									\
		return sys_ni_syscall();					\
	}

#endif // __ASM_POWERPC_SYSCALL_WRAPPER_H
Commit	Line	Data
7e92e01b RM	1	/* SPDX-License-Identifier: GPL-2.0 */
	2	/*
	3	* syscall_wrapper.h - powerpc specific wrappers to syscall definitions
	4	*
	5	* Based on arch/{x86,arm64}/include/asm/syscall_wrapper.h
	6	*/
	7
	8	#ifndef __ASM_POWERPC_SYSCALL_WRAPPER_H
	9	#define __ASM_POWERPC_SYSCALL_WRAPPER_H
	10
	11	struct pt_regs;
	12
	13	#define SC_POWERPC_REGS_TO_ARGS(x, ...) \
	14	__MAP(x,__SC_ARGS \
	15	,,regs->gpr[3],,regs->gpr[4],,regs->gpr[5] \
	16	,,regs->gpr[6],,regs->gpr[7],,regs->gpr[8])
	17
	18	#define __SYSCALL_DEFINEx(x, name, ...) \
94746890 ME	19	long sys##name(const struct pt_regs *regs); \
94746890 ME	20	ALLOW_ERROR_INJECTION(sys##name, ERRNO); \
7e92e01b RM	21	static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
7e92e01b RM	22	static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
94746890	23	long sys##name(const struct pt_regs *regs) \
7e92e01b RM	24	{ \
	25	return __se_sys##name(SC_POWERPC_REGS_TO_ARGS(x,__VA_ARGS__)); \
	26	} \
	27	static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
	28	{ \
	29	long ret = __do_sys##name(__MAP(x,__SC_CAST,__VA_ARGS__)); \
	30	__MAP(x,__SC_TEST,__VA_ARGS__); \
	31	__PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__)); \
	32	return ret; \
	33	} \
	34	static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
	35
	36	#define SYSCALL_DEFINE0(sname) \
	37	SYSCALL_METADATA(_##sname, 0); \
94746890 ME	38	long sys_##sname(const struct pt_regs *__unused); \
	39	ALLOW_ERROR_INJECTION(sys_##sname, ERRNO); \
	40	long sys_##sname(const struct pt_regs *__unused)
7e92e01b RM	41
7e92e01b RM	42	#define COND_SYSCALL(name) \
94746890 ME	43	long sys_##name(const struct pt_regs *regs); \
94746890 ME	44	long __weak sys_##name(const struct pt_regs *regs) \
7e92e01b RM	45	{ \
	46	return sys_ni_syscall(); \
	47	}
	48
7e92e01b	49	#endif // __ASM_POWERPC_SYSCALL_WRAPPER_H