projects / mirror_ubuntu-jammy-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| f1ba1285 RM |
1 | /* |
| 2 | * Access to user system call parameters and results | |
| 3 | * | |
| 4 | * Copyright (C) 2008 Red Hat, Inc. All rights reserved. | |
| 5 | * | |
| 6 | * This copyrighted material is made available to anyone wishing to use, | |
| 7 | * modify, copy, or redistribute it subject to the terms and conditions | |
| 8 | * of the GNU General Public License v.2. | |
| 9 | * | |
| 10 | * See asm-generic/syscall.h for descriptions of what we must do here. | |
| 11 | */ | |
| 12 | ||
| 13 | #ifndef _ASM_SYSCALL_H | |
| 14 | #define _ASM_SYSCALL_H 1 | |
| 15 | ||
| ce5d1128 | 16 | #include <uapi/linux/audit.h> |
| f1ba1285 | 17 | #include <linux/sched.h> |
| 75dddcbd | 18 | #include <linux/thread_info.h> |
| f1ba1285 | 19 | |
| 02424d89 IM |
20 | /* ftrace syscalls requires exporting the sys_call_table */ |
| 21 | #ifdef CONFIG_FTRACE_SYSCALLS | |
| 1028ccf5 | 22 | extern const unsigned long sys_call_table[]; |
| 02424d89 IM |
23 | #endif /* CONFIG_FTRACE_SYSCALLS */ |
| 24 | ||
| f1ba1285 RM |
25 | static inline long syscall_get_nr(struct task_struct *task, |
| 26 | struct pt_regs *regs) | |
| 27 | { | |
| 28 | return TRAP(regs) == 0xc00 ? regs->gpr[0] : -1L; | |
| 29 | } | |
| 30 | ||
| 31 | static inline void syscall_rollback(struct task_struct *task, | |
| 32 | struct pt_regs *regs) | |
| 33 | { | |
| 34 | regs->gpr[3] = regs->orig_gpr3; | |
| 35 | } | |
| 36 | ||
| f1ba1285 RM |
37 | static inline long syscall_get_return_value(struct task_struct *task, |
| 38 | struct pt_regs *regs) | |
| 39 | { | |
| 40 | return regs->gpr[3]; | |
| 41 | } | |
| 42 | ||
| 43 | static inline void syscall_set_return_value(struct task_struct *task, | |
| 44 | struct pt_regs *regs, | |
| 45 | int error, long val) | |
| 46 | { | |
| 47 | if (error) { | |
| 409d241b | 48 | regs->ccr |= 0x10000000L; |
| f1ba1285 RM |
49 | regs->gpr[3] = -error; |
| 50 | } else { | |
| 409d241b | 51 | regs->ccr &= ~0x10000000L; |
| f1ba1285 RM |
52 | regs->gpr[3] = val; |
| 53 | } | |
| 54 | } | |
| 55 | ||
| 56 | static inline void syscall_get_arguments(struct task_struct *task, | |
| 57 | struct pt_regs *regs, | |
| 58 | unsigned int i, unsigned int n, | |
| 59 | unsigned long *args) | |
| 60 | { | |
| 61 | BUG_ON(i + n > 6); | |
| 62 | #ifdef CONFIG_PPC64 | |
| 63 | if (test_tsk_thread_flag(task, TIF_32BIT)) { | |
| 64 | /* | |
| 65 | * Zero-extend 32-bit argument values. The high bits are | |
| 66 | * garbage ignored by the actual syscall dispatch. | |
| 67 | */ | |
| 68 | while (n-- > 0) | |
| 69 | args[n] = (u32) regs->gpr[3 + i + n]; | |
| 70 | return; | |
| 71 | } | |
| 72 | #endif | |
| 73 | memcpy(args, ®s->gpr[3 + i], n * sizeof(args[0])); | |
| 74 | } | |
| 75 | ||
| 76 | static inline void syscall_set_arguments(struct task_struct *task, | |
| 77 | struct pt_regs *regs, | |
| 78 | unsigned int i, unsigned int n, | |
| 79 | const unsigned long *args) | |
| 80 | { | |
| 81 | BUG_ON(i + n > 6); | |
| 82 | memcpy(®s->gpr[3 + i], args, n * sizeof(args[0])); | |
| 83 | } | |
| 84 | ||
| ce5d1128 EP |
85 | static inline int syscall_get_arch(void) |
| 86 | { | |
| 63f13448 RGB |
87 | int arch = is_32bit_task() ? AUDIT_ARCH_PPC : AUDIT_ARCH_PPC64; |
| 88 | #ifdef __LITTLE_ENDIAN__ | |
| 89 | arch |= __AUDIT_ARCH_LE; | |
| 90 | #endif | |
| 91 | return arch; | |
| ce5d1128 | 92 | } |
| f1ba1285 | 93 | #endif /* _ASM_SYSCALL_H */ |