| | 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_set_nr(struct task_struct *task, |
| | 19 | struct pt_regs *regs, |
| | 20 | int nr) |
| | 21 | { |
| | 22 | /* |
| | 23 | * Unlike syscall_get_nr(), syscall_set_nr() can be called only when |
| | 24 | * the target task is stopped for tracing on entering syscall, so |
| | 25 | * there is no need to have the same check syscall_get_nr() has. |
| | 26 | */ |
| | 27 | regs->regs[3] = nr; |
| | 28 | } |
| | 29 | |
| | 30 | static inline void syscall_rollback(struct task_struct *task, |
| | 31 | struct pt_regs *regs) |
| | 32 | { |
| | 33 | /* |
| | 34 | * XXX: This needs some thought. On SH we don't |
| | 35 | * save away the original r0 value anywhere. |
| | 36 | */ |
| | 37 | } |
| | 38 | |
| | 39 | static inline long syscall_get_error(struct task_struct *task, |
| | 40 | struct pt_regs *regs) |
| | 41 | { |
| | 42 | return IS_ERR_VALUE(regs->regs[0]) ? regs->regs[0] : 0; |
| | 43 | } |
| | 44 | |
| | 45 | static inline long syscall_get_return_value(struct task_struct *task, |
| | 46 | struct pt_regs *regs) |
| | 47 | { |
| | 48 | return regs->regs[0]; |
| | 49 | } |
| | 50 | |
| | 51 | static inline void syscall_set_return_value(struct task_struct *task, |
| | 52 | struct pt_regs *regs, |
| | 53 | int error, long val) |
| | 54 | { |
| | 55 | regs->regs[0] = (long) error ?: val; |
| | 56 | } |
| | 57 | |
| | 58 | static inline void syscall_get_arguments(struct task_struct *task, |
| | 59 | struct pt_regs *regs, |
| | 60 | unsigned long *args) |
| | 61 | { |
| | 62 | |
| | 63 | /* Argument pattern is: R4, R5, R6, R7, R0, R1 */ |
| | 64 | args[5] = regs->regs[1]; |
| | 65 | args[4] = regs->regs[0]; |
| | 66 | args[3] = regs->regs[7]; |
| | 67 | args[2] = regs->regs[6]; |
| | 68 | args[1] = regs->regs[5]; |
| | 69 | args[0] = regs->regs[4]; |
| | 70 | } |
| | 71 | |
| | 72 | static inline void syscall_set_arguments(struct task_struct *task, |
| | 73 | struct pt_regs *regs, |
| | 74 | const unsigned long *args) |
| | 75 | { |
| | 76 | regs->regs[1] = args[5]; |
| | 77 | regs->regs[0] = args[4]; |
| | 78 | regs->regs[7] = args[3]; |
| | 79 | regs->regs[6] = args[2]; |
| | 80 | regs->regs[5] = args[1]; |
| | 81 | regs->regs[4] = args[0]; |
| | 82 | } |
| | 83 | |
| | 84 | static inline int syscall_get_arch(struct task_struct *task) |
| | 85 | { |
| | 86 | int arch = AUDIT_ARCH_SH; |
| | 87 | |
| | 88 | #ifdef CONFIG_CPU_LITTLE_ENDIAN |
| | 89 | arch |= __AUDIT_ARCH_LE; |
| | 90 | #endif |
| | 91 | return arch; |
| | 92 | } |
| | 93 | #endif /* __ASM_SH_SYSCALL_32_H */ |
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