1 #ifndef __ASM_SPARC_SYSCALL_H
2 #define __ASM_SPARC_SYSCALL_H
4 #include <uapi/linux/audit.h>
5 #include <linux/kernel.h>
6 #include <linux/compat.h>
7 #include <linux/sched.h>
8 #include <asm/ptrace.h>
9 #include <asm/thread_info.h>
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.
16 extern const unsigned int sys_call_table[];
18 /* The system call number is given by the user in %g1 */
19 static inline long syscall_get_nr(struct task_struct *task,
22 int syscall_p = pt_regs_is_syscall(regs);
24 return (syscall_p ? regs->u_regs[UREG_G1] : -1L);
27 static inline void syscall_rollback(struct task_struct *task,
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.
40 static inline bool syscall_has_error(struct pt_regs *regs)
42 return (regs->psr & PSR_C) ? true : false;
44 static inline void syscall_set_error(struct pt_regs *regs)
48 static inline void syscall_clear_error(struct pt_regs *regs)
53 static inline bool syscall_has_error(struct pt_regs *regs)
55 return (regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY)) ? true : false;
57 static inline void syscall_set_error(struct pt_regs *regs)
59 regs->tstate |= (TSTATE_XCARRY | TSTATE_ICARRY);
61 static inline void syscall_clear_error(struct pt_regs *regs)
63 regs->tstate &= ~(TSTATE_XCARRY | TSTATE_ICARRY);
67 static inline long syscall_get_error(struct task_struct *task,
70 long val = regs->u_regs[UREG_I0];
72 return (syscall_has_error(regs) ? -val : 0);
75 static inline long syscall_get_return_value(struct task_struct *task,
78 long val = regs->u_regs[UREG_I0];
83 static inline void syscall_set_return_value(struct task_struct *task,
88 syscall_set_error(regs);
89 regs->u_regs[UREG_I0] = -error;
91 syscall_clear_error(regs);
92 regs->u_regs[UREG_I0] = val;
96 static inline void syscall_get_arguments(struct task_struct *task,
98 unsigned int i, unsigned int n,
104 #ifdef CONFIG_SPARC64
105 if (test_tsk_thread_flag(task, TIF_32BIT))
109 for (j = 0; j < n; j++) {
110 unsigned long val = regs->u_regs[UREG_I0 + i + j];
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)
126 for (j = 0; j < n; j++)
127 regs->u_regs[UREG_I0 + i + j] = args[j];
130 static inline int syscall_get_arch(void)
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;
137 return AUDIT_ARCH_SPARC;
141 #endif /* __ASM_SPARC_SYSCALL_H */