projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| fb4f87a2 PM |
2 | #ifndef __ASM_SH_SYSCALL_32_H |
| 3 | #define __ASM_SH_SYSCALL_32_H | |
| 4 | ||
| 37d181bb | 5 | #include <uapi/linux/audit.h> |
| fb4f87a2 PM |
6 | #include <linux/kernel.h> |
| 7 | #include <linux/sched.h> | |
| 34e19ada | 8 | #include <linux/err.h> |
| fb4f87a2 PM |
9 | #include <asm/ptrace.h> |
| 10 | ||
| f15b2dc0 | 11 | /* The system call number is given by the user in R3 */ |
| fb4f87a2 PM |
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 | ||
| cc662273 DL |
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 | ||
| fb4f87a2 PM |
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 | ||
| fb4f87a2 PM |
39 | static inline long syscall_get_error(struct task_struct *task, |
| 40 | struct pt_regs *regs) | |
| 41 | { | |
| 03f07876 | 42 | return IS_ERR_VALUE(regs->regs[0]) ? regs->regs[0] : 0; |
| fb4f87a2 PM |
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 | { | |
| 03dd061f | 55 | regs->regs[0] = (long) error ?: val; |
| fb4f87a2 PM |
56 | } |
| 57 | ||
| 58 | static inline void syscall_get_arguments(struct task_struct *task, | |
| 59 | struct pt_regs *regs, | |
| fb4f87a2 PM |
60 | unsigned long *args) |
| 61 | { | |
| fb4f87a2 PM |
62 | |
| 63 | /* Argument pattern is: R4, R5, R6, R7, R0, R1 */ | |
| b35f549d SRRH |
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]; | |
| fb4f87a2 PM |
70 | } |
| 71 | ||
| 17fc7b8f DL |
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 | ||
| 16add411 | 84 | static inline int syscall_get_arch(struct task_struct *task) |
| 37d181bb EP |
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 | } | |
| fb4f87a2 | 93 | #endif /* __ASM_SH_SYSCALL_32_H */ |