1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_SH_SYSCALL_32_H 3 #define __ASM_SH_SYSCALL_32_H 4 5 #include <uapi/linux/audit.h> 6 #include <linux/kernel.h> 7 #include <linux/sched.h> 8 #include <linux/err.h> 9 #include <asm/ptrace.h> 10 11 /* The system call number is given by the user in R3 */ 12 static inline long syscall_get_nr(struct task_struct *task, 13 struct pt_regs *regs) 14 { 15 return (regs->tra >= 0) ? regs->regs[3] : -1L; 16 } 17 18 static inline void syscall_rollback(struct task_struct *task, 19 struct pt_regs *regs) 20 { 21 /* 22 * XXX: This needs some thought. On SH we don't 23 * save away the original r0 value anywhere. 24 */ 25 } 26 27 static inline long syscall_get_error(struct task_struct *task, 28 struct pt_regs *regs) 29 { 30 return IS_ERR_VALUE(regs->regs[0]) ? regs->regs[0] : 0; 31 } 32 33 static inline long syscall_get_return_value(struct task_struct *task, 34 struct pt_regs *regs) 35 { 36 return regs->regs[0]; 37 } 38 39 static inline void syscall_set_return_value(struct task_struct *task, 40 struct pt_regs *regs, 41 int error, long val) 42 { 43 regs->regs[0] = (long) error ?: val; 44 } 45 46 static inline void syscall_get_arguments(struct task_struct *task, 47 struct pt_regs *regs, 48 unsigned long *args) 49 { 50 51 /* Argument pattern is: R4, R5, R6, R7, R0, R1 */ 52 args[5] = regs->regs[1]; 53 args[4] = regs->regs[0]; 54 args[3] = regs->regs[7]; 55 args[2] = regs->regs[6]; 56 args[1] = regs->regs[5]; 57 args[0] = regs->regs[4]; 58 } 59 60 static inline int syscall_get_arch(struct task_struct *task) 61 { 62 int arch = AUDIT_ARCH_SH; 63 64 #ifdef CONFIG_CPU_LITTLE_ENDIAN 65 arch |= __AUDIT_ARCH_LE; 66 #endif 67 return arch; 68 } 69 #endif /* __ASM_SH_SYSCALL_32_H */ 70