| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 */ |