[deliverable/linux.git] / arch / sparc / include / asm / syscall.h

#ifndef __ASM_SPARC_SYSCALL_H
#define __ASM_SPARC_SYSCALL_H

#include <uapi/linux/audit.h>
#include <linux/kernel.h>
#include <linux/compat.h>
#include <linux/sched.h>
#include <asm/ptrace.h>
#include <asm/thread_info.h>

/*
 * The syscall table always contains 32 bit pointers since we know that the
 * address of the function to be called is (way) below 4GB.  So the "int"
 * type here is what we want [need] for both 32 bit and 64 bit systems.
 */
extern const unsigned int sys_call_table[];

/* The system call number is given by the user in %g1 */
static inline long syscall_get_nr(struct task_struct *task,
				  struct pt_regs *regs)
{
	int syscall_p = pt_regs_is_syscall(regs);

	return (syscall_p ? regs->u_regs[UREG_G1] : -1L);
}

static inline void syscall_rollback(struct task_struct *task,
				    struct pt_regs *regs)
{
	/* XXX This needs some thought.  On Sparc we don't
	 * XXX save away the original %o0 value somewhere.
	 * XXX Instead we hold it in register %l5 at the top
	 * XXX level trap frame and pass this down to the signal
	 * XXX dispatch code which is the only place that value
	 * XXX ever was needed.
	 */
}

#ifdef CONFIG_SPARC32
static inline bool syscall_has_error(struct pt_regs *regs)
{
	return (regs->psr & PSR_C) ? true : false;
}
static inline void syscall_set_error(struct pt_regs *regs)
{
	regs->psr |= PSR_C;
}
static inline void syscall_clear_error(struct pt_regs *regs)
{
	regs->psr &= ~PSR_C;
}
#else
static inline bool syscall_has_error(struct pt_regs *regs)
{
	return (regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY)) ? true : false;
}
static inline void syscall_set_error(struct pt_regs *regs)
{
	regs->tstate |= (TSTATE_XCARRY | TSTATE_ICARRY);
}
static inline void syscall_clear_error(struct pt_regs *regs)
{
	regs->tstate &= ~(TSTATE_XCARRY | TSTATE_ICARRY);
}
#endif

static inline long syscall_get_error(struct task_struct *task,
				     struct pt_regs *regs)
{
	long val = regs->u_regs[UREG_I0];

	return (syscall_has_error(regs) ? -val : 0);
}

static inline long syscall_get_return_value(struct task_struct *task,
					    struct pt_regs *regs)
{
	long val = regs->u_regs[UREG_I0];

	return val;
}

static inline void syscall_set_return_value(struct task_struct *task,
					    struct pt_regs *regs,
					    int error, long val)
{
	if (error) {
		syscall_set_error(regs);
		regs->u_regs[UREG_I0] = -error;
	} else {
		syscall_clear_error(regs);
		regs->u_regs[UREG_I0] = val;
	}
}

static inline void syscall_get_arguments(struct task_struct *task,
					 struct pt_regs *regs,
					 unsigned int i, unsigned int n,
					 unsigned long *args)
{
	int zero_extend = 0;
	unsigned int j;

#ifdef CONFIG_SPARC64
	if (test_tsk_thread_flag(task, TIF_32BIT))
		zero_extend = 1;
#endif

	for (j = 0; j < n; j++) {
		unsigned long val = regs->u_regs[UREG_I0 + i + j];

		if (zero_extend)
			args[j] = (u32) val;
		else
			args[j] = val;
	}
}

static inline void syscall_set_arguments(struct task_struct *task,
					 struct pt_regs *regs,
					 unsigned int i, unsigned int n,
					 const unsigned long *args)
{
	unsigned int j;

	for (j = 0; j < n; j++)
		regs->u_regs[UREG_I0 + i + j] = args[j];
}

static inline int syscall_get_arch(void)
{
#if defined(CONFIG_SPARC64) && defined(CONFIG_COMPAT)
	return in_compat_syscall() ? AUDIT_ARCH_SPARC : AUDIT_ARCH_SPARC64;
#elif defined(CONFIG_SPARC64)
	return AUDIT_ARCH_SPARC64;
#else
	return AUDIT_ARCH_SPARC;
#endif
}

#endif /* __ASM_SPARC_SYSCALL_H */
Commit	Line	Data
badcbf0e DM	1	#ifndef __ASM_SPARC_SYSCALL_H
	2	#define __ASM_SPARC_SYSCALL_H
	3
ce5d1128	4	#include <uapi/linux/audit.h>
badcbf0e	5	#include <linux/kernel.h>
203f7907	6	#include <linux/compat.h>
badcbf0e DM	7	#include <linux/sched.h>
badcbf0e DM	8	#include <asm/ptrace.h>
ce5d1128	9	#include <asm/thread_info.h>
badcbf0e	10
e7b8e675 MF	11	/*
	12	* The syscall table always contains 32 bit pointers since we know that the
	13	* address of the function to be called is (way) below 4GB. So the "int"
	14	* type here is what we want [need] for both 32 bit and 64 bit systems.
	15	*/
	16	extern const unsigned int sys_call_table[];
	17
badcbf0e DM	18	/* The system call number is given by the user in %g1 */
	19	static inline long syscall_get_nr(struct task_struct *task,
	20	struct pt_regs *regs)
	21	{
	22	int syscall_p = pt_regs_is_syscall(regs);
	23
	24	return (syscall_p ? regs->u_regs[UREG_G1] : -1L);
	25	}
	26
	27	static inline void syscall_rollback(struct task_struct *task,
	28	struct pt_regs *regs)
	29	{
	30	/* XXX This needs some thought. On Sparc we don't
	31	* XXX save away the original %o0 value somewhere.
	32	* XXX Instead we hold it in register %l5 at the top
	33	* XXX level trap frame and pass this down to the signal
	34	* XXX dispatch code which is the only place that value
	35	* XXX ever was needed.
	36	*/
	37	}
	38
	39	#ifdef CONFIG_SPARC32
	40	static inline bool syscall_has_error(struct pt_regs *regs)
	41	{
	42	return (regs->psr & PSR_C) ? true : false;
	43	}
	44	static inline void syscall_set_error(struct pt_regs *regs)
	45	{
	46	regs->psr \|= PSR_C;
	47	}
	48	static inline void syscall_clear_error(struct pt_regs *regs)
	49	{
	50	regs->psr &= ~PSR_C;
	51	}
	52	#else
	53	static inline bool syscall_has_error(struct pt_regs *regs)
	54	{
	55	return (regs->tstate & (TSTATE_XCARRY \| TSTATE_ICARRY)) ? true : false;
	56	}
	57	static inline void syscall_set_error(struct pt_regs *regs)
	58	{
	59	regs->tstate \|= (TSTATE_XCARRY \| TSTATE_ICARRY);
	60	}
	61	static inline void syscall_clear_error(struct pt_regs *regs)
	62	{
	63	regs->tstate &= ~(TSTATE_XCARRY \| TSTATE_ICARRY);
	64	}
	65	#endif
	66
	67	static inline long syscall_get_error(struct task_struct *task,
	68	struct pt_regs *regs)
	69	{
	70	long val = regs->u_regs[UREG_I0];
	71
	72	return (syscall_has_error(regs) ? -val : 0);
	73	}
	74
	75	static inline long syscall_get_return_value(struct task_struct *task,
	76	struct pt_regs *regs)
	77	{
	78	long val = regs->u_regs[UREG_I0];
	79
	80	return val;
	81	}
82
83	static inline void syscall_set_return_value(struct task_struct *task,
84	struct pt_regs *regs,
85	int error, long val)
86	{
87	if (error) {
88	syscall_set_error(regs);
89	regs->u_regs[UREG_I0] = -error;
90	} else {
91	syscall_clear_error(regs);
92	regs->u_regs[UREG_I0] = val;
93	}
94	}
95
96	static inline void syscall_get_arguments(struct task_struct *task,
97	struct pt_regs *regs,
98	unsigned int i, unsigned int n,
99	unsigned long *args)
100	{
101	int zero_extend = 0;
102	unsigned int j;
103
104	#ifdef CONFIG_SPARC64
105	if (test_tsk_thread_flag(task, TIF_32BIT))
106	zero_extend = 1;
107	#endif
108
109	for (j = 0; j < n; j++) {
110	unsigned long val = regs->u_regs[UREG_I0 + i + j];
111
112	if (zero_extend)
113	args[j] = (u32) val;
114	else
115	args[j] = val;
116	}
117	}
118
119	static inline void syscall_set_arguments(struct task_struct *task,
120	struct pt_regs *regs,
121	unsigned int i, unsigned int n,
122	const unsigned long *args)
123	{
124	unsigned int j;
125
126	for (j = 0; j < n; j++)
127	regs->u_regs[UREG_I0 + i + j] = args[j];
128	}
129
ce5d1128 EP	130	static inline int syscall_get_arch(void)
ce5d1128 EP	131	{
203f7907 AL	132	#if defined(CONFIG_SPARC64) && defined(CONFIG_COMPAT)
	133	return in_compat_syscall() ? AUDIT_ARCH_SPARC : AUDIT_ARCH_SPARC64;
	134	#elif defined(CONFIG_SPARC64)
	135	return AUDIT_ARCH_SPARC64;
	136	#else
	137	return AUDIT_ARCH_SPARC;
	138	#endif
ce5d1128 EP	139	}
ce5d1128 EP	140
badcbf0e	141	#endif /* __ASM_SPARC_SYSCALL_H */