projects / linux-2.6-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 | ||
| 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 | ||
| fb4f87a2 PM |
27 | static inline long syscall_get_error(struct task_struct *task, |
| 28 | struct pt_regs *regs) | |
| 29 | { | |
| 03f07876 | 30 | return IS_ERR_VALUE(regs->regs[0]) ? regs->regs[0] : 0; |
| fb4f87a2 PM |
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 | { | |
| 03f07876 | 43 | if (error) |
| fb4f87a2 | 44 | regs->regs[0] = -error; |
| 03f07876 | 45 | else |
| fb4f87a2 | 46 | regs->regs[0] = val; |
| fb4f87a2 PM |
47 | } |
| 48 | ||
| 49 | static inline void syscall_get_arguments(struct task_struct *task, | |
| 50 | struct pt_regs *regs, | |
| 51 | unsigned int i, unsigned int n, | |
| 52 | unsigned long *args) | |
| 53 | { | |
| 54 | /* | |
| 55 | * Do this simply for now. If we need to start supporting | |
| 56 | * fetching arguments from arbitrary indices, this will need some | |
| 57 | * extra logic. Presently there are no in-tree users that depend | |
| 58 | * on this behaviour. | |
| 59 | */ | |
| 60 | BUG_ON(i); | |
| 61 | ||
| 62 | /* Argument pattern is: R4, R5, R6, R7, R0, R1 */ | |
| 63 | switch (n) { | |
| 64 | case 6: args[5] = regs->regs[1]; | |
| 65 | case 5: args[4] = regs->regs[0]; | |
| 66 | case 4: args[3] = regs->regs[7]; | |
| 67 | case 3: args[2] = regs->regs[6]; | |
| 68 | case 2: args[1] = regs->regs[5]; | |
| 69 | case 1: args[0] = regs->regs[4]; | |
| c652d780 | 70 | case 0: |
| fb4f87a2 PM |
71 | break; |
| 72 | default: | |
| 73 | BUG(); | |
| 74 | } | |
| 75 | } | |
| 76 | ||
| 77 | static inline void syscall_set_arguments(struct task_struct *task, | |
| 78 | struct pt_regs *regs, | |
| 79 | unsigned int i, unsigned int n, | |
| 80 | const unsigned long *args) | |
| 81 | { | |
| 82 | /* Same note as above applies */ | |
| 83 | BUG_ON(i); | |
| 84 | ||
| 85 | switch (n) { | |
| 86 | case 6: regs->regs[1] = args[5]; | |
| 87 | case 5: regs->regs[0] = args[4]; | |
| 88 | case 4: regs->regs[7] = args[3]; | |
| 89 | case 3: regs->regs[6] = args[2]; | |
| 90 | case 2: regs->regs[5] = args[1]; | |
| 91 | case 1: regs->regs[4] = args[0]; | |
| 92 | break; | |
| 93 | default: | |
| 94 | BUG(); | |
| 95 | } | |
| 96 | } | |
| 97 | ||
| 37d181bb EP |
98 | static inline int syscall_get_arch(void) |
| 99 | { | |
| 100 | int arch = AUDIT_ARCH_SH; | |
| 101 | ||
| 102 | #ifdef CONFIG_CPU_LITTLE_ENDIAN | |
| 103 | arch |= __AUDIT_ARCH_LE; | |
| 104 | #endif | |
| 105 | return arch; | |
| 106 | } | |
| fb4f87a2 | 107 | #endif /* __ASM_SH_SYSCALL_32_H */ |