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 if (error) 44 regs->regs[0] = -error; 45 else 46 regs->regs[0] = val; 47 } 48 49 static inline void syscall_get_arguments(struct task_struct *task, 50 struct pt_regs *regs, 51 unsigned long *args) 52 { 53 54 /* Argument pattern is: R4, R5, R6, R7, R0, R1 */ 55 args[5] = regs->regs[1]; 56 args[4] = regs->regs[0]; 57 args[3] = regs->regs[7]; 58 args[2] = regs->regs[6]; 59 args[1] = regs->regs[5]; 60 args[0] = regs->regs[4]; 61 } 62 63 static inline void syscall_set_arguments(struct task_struct *task, 64 struct pt_regs *regs, 65 const unsigned long *args) 66 { 67 regs->regs[1] = args[5]; 68 regs->regs[0] = args[4]; 69 regs->regs[7] = args[3]; 70 regs->regs[6] = args[2]; 71 regs->regs[5] = args[1]; 72 regs->regs[4] = args[0]; 73 } 74 75 static inline int syscall_get_arch(struct task_struct *task) 76 { 77 int arch = AUDIT_ARCH_SH; 78 79 #ifdef CONFIG_CPU_LITTLE_ENDIAN 80 arch |= __AUDIT_ARCH_LE; 81 #endif 82 return arch; 83 } 84 #endif /* __ASM_SH_SYSCALL_32_H */ 85