1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_SH_SYSCALL_32_H
3 #define __ASM_SH_SYSCALL_32_H
5 #include <uapi/linux/audit.h>
6 #include <linux/kernel.h>
7 #include <linux/sched.h>
9 #include <asm/ptrace.h>
11 /* The system call number is given by the user in R3 */
12 static inline long syscall_get_nr(struct task_struct *task,
15 return (regs->tra >= 0) ? regs->regs[3] : -1L;
18 static inline void syscall_rollback(struct task_struct *task,
22 * XXX: This needs some thought. On SH we don't
23 * save away the original r0 value anywhere.
27 static inline long syscall_get_error(struct task_struct *task,
30 return IS_ERR_VALUE(regs->regs[0]) ? regs->regs[0] : 0;
33 static inline long syscall_get_return_value(struct task_struct *task,
39 static inline void syscall_set_return_value(struct task_struct *task,
44 regs->regs[0] = -error;
49 static inline void syscall_get_arguments(struct task_struct *task,
51 unsigned int i, unsigned int n,
55 * Do this simply for now. If we need to start supporting
56 * fetching arguments from arbitrary indices, this will need some
57 * extra logic. Presently there are no in-tree users that depend
62 /* Argument pattern is: R4, R5, R6, R7, R0, R1 */
64 case 6: args[5] = regs->regs[1];
65 case 5: args[4] = regs->regs[0];
66 case 4: args[3] = regs->regs[7];
67 case 3: args[2] = regs->regs[6];
68 case 2: args[1] = regs->regs[5];
69 case 1: args[0] = regs->regs[4];
77 static inline void syscall_set_arguments(struct task_struct *task,
79 unsigned int i, unsigned int n,
80 const unsigned long *args)
82 /* Same note as above applies */
86 case 6: regs->regs[1] = args[5];
87 case 5: regs->regs[0] = args[4];
88 case 4: regs->regs[7] = args[3];
89 case 3: regs->regs[6] = args[2];
90 case 2: regs->regs[5] = args[1];
91 case 1: regs->regs[4] = args[0];
98 static inline int syscall_get_arch(void)
100 int arch = AUDIT_ARCH_SH;
102 #ifdef CONFIG_CPU_LITTLE_ENDIAN
103 arch |= __AUDIT_ARCH_LE;
107 #endif /* __ASM_SH_SYSCALL_32_H */