1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_SPARC_SYSCALL_H
3 #define __ASM_SPARC_SYSCALL_H
5 #include <uapi/linux/audit.h>
6 #include <linux/kernel.h>
7 #include <linux/compat.h>
8 #include <linux/sched.h>
9 #include <asm/ptrace.h>
10 #include <asm/thread_info.h>
13 * The syscall table always contains 32 bit pointers since we know that the
14 * address of the function to be called is (way) below 4GB. So the "int"
15 * type here is what we want [need] for both 32 bit and 64 bit systems.
17 extern const unsigned int sys_call_table[];
19 /* The system call number is given by the user in %g1 */
20 static inline long syscall_get_nr(struct task_struct *task,
23 int syscall_p = pt_regs_is_syscall(regs);
25 return (syscall_p ? regs->u_regs[UREG_G1] : -1L);
28 static inline void syscall_rollback(struct task_struct *task,
31 /* XXX This needs some thought. On Sparc we don't
32 * XXX save away the original %o0 value somewhere.
33 * XXX Instead we hold it in register %l5 at the top
34 * XXX level trap frame and pass this down to the signal
35 * XXX dispatch code which is the only place that value
36 * XXX ever was needed.
41 static inline bool syscall_has_error(struct pt_regs *regs)
43 return (regs->psr & PSR_C) ? true : false;
45 static inline void syscall_set_error(struct pt_regs *regs)
49 static inline void syscall_clear_error(struct pt_regs *regs)
54 static inline bool syscall_has_error(struct pt_regs *regs)
56 return (regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY)) ? true : false;
58 static inline void syscall_set_error(struct pt_regs *regs)
60 regs->tstate |= (TSTATE_XCARRY | TSTATE_ICARRY);
62 static inline void syscall_clear_error(struct pt_regs *regs)
64 regs->tstate &= ~(TSTATE_XCARRY | TSTATE_ICARRY);
68 static inline long syscall_get_error(struct task_struct *task,
71 long val = regs->u_regs[UREG_I0];
73 return (syscall_has_error(regs) ? -val : 0);
76 static inline long syscall_get_return_value(struct task_struct *task,
79 long val = regs->u_regs[UREG_I0];
84 static inline void syscall_set_return_value(struct task_struct *task,
89 syscall_set_error(regs);
90 regs->u_regs[UREG_I0] = -error;
92 syscall_clear_error(regs);
93 regs->u_regs[UREG_I0] = val;
97 static inline void syscall_get_arguments(struct task_struct *task,
105 #ifdef CONFIG_SPARC64
106 if (test_tsk_thread_flag(task, TIF_32BIT))
110 for (j = 0; j < n; j++) {
111 unsigned long val = regs->u_regs[UREG_I0 + j];
120 static inline int syscall_get_arch(struct task_struct *task)
122 #if defined(CONFIG_SPARC64) && defined(CONFIG_COMPAT)
123 return test_tsk_thread_flag(task, TIF_32BIT)
124 ? AUDIT_ARCH_SPARC : AUDIT_ARCH_SPARC64;
125 #elif defined(CONFIG_SPARC64)
126 return AUDIT_ARCH_SPARC64;
128 return AUDIT_ARCH_SPARC;
132 #endif /* __ASM_SPARC_SYSCALL_H */