/* * Copyright (C) 2008-2009 Red Hat, Inc. All rights reserved. * Copyright 2010 Tilera Corporation. All Rights Reserved. * Copyright 2015 Regents of the University of California, Berkeley * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation, version 2. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * See asm-generic/syscall.h for descriptions of what we must do here. */ #ifndef _ASM_RISCV_SYSCALL_H #define _ASM_RISCV_SYSCALL_H #include <linux/sched.h> #include <linux/err.h> /* The array of function pointers for syscalls. */ extern void *sys_call_table[]; /* * Only the low 32 bits of orig_r0 are meaningful, so we return int. * This importantly ignores the high bits on 64-bit, so comparisons * sign-extend the low 32 bits. */ static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs) { return regs->a7; } static inline void syscall_set_nr(struct task_struct *task, struct pt_regs *regs, int sysno) { regs->a7 = sysno; } static inline void syscall_rollback(struct task_struct *task, struct pt_regs *regs) { regs->a0 = regs->orig_a0; } static inline long syscall_get_error(struct task_struct *task, struct pt_regs *regs) { unsigned long error = regs->a0; return IS_ERR_VALUE(error) ? error : 0; } static inline long syscall_get_return_value(struct task_struct *task, struct pt_regs *regs) { return regs->a0; } static inline void syscall_set_return_value(struct task_struct *task, struct pt_regs *regs, int error, long val) { regs->a0 = (long) error ?: val; } static inline void syscall_get_arguments(struct task_struct *task, struct pt_regs *regs, unsigned int i, unsigned int n, unsigned long *args) { BUG_ON(i + n > 6); if (i == 0) { args[0] = regs->orig_a0; args++; n--; } else { i--; } memcpy(args, ®s->a1 + i, n * sizeof(args[0])); } static inline void syscall_set_arguments(struct task_struct *task, struct pt_regs *regs, unsigned int i, unsigned int n, const unsigned long *args) { BUG_ON(i + n > 6); if (i == 0) { regs->orig_a0 = args[0]; args++; n--; } else { i--; } memcpy(®s->a1 + i, args, n * sizeof(regs->a1)); } #endif /* _ASM_RISCV_SYSCALL_H */
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Kbuild | File | 1.37 KB | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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asm-prototypes.h | File | 176 B | 0644 |
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asm.h | File | 1.78 KB | 0644 |
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atomic.h | File | 11.31 KB | 0644 |
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barrier.h | File | 2.59 KB | 0644 |
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bitops.h | File | 6.23 KB | 0644 |
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bug.h | File | 2.12 KB | 0644 |
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cache.h | File | 745 B | 0644 |
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cacheflush.h | File | 1.7 KB | 0644 |
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cmpxchg.h | File | 3.35 KB | 0644 |
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compat.h | File | 924 B | 0644 |
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csr.h | File | 3.8 KB | 0644 |
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current.h | File | 1.27 KB | 0644 |
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delay.h | File | 881 B | 0644 |
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dma-mapping.h | File | 1.19 KB | 0644 |
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elf.h | File | 2.3 KB | 0644 |
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fence.h | File | 279 B | 0644 |
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hwcap.h | File | 1013 B | 0644 |
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io.h | File | 11.81 KB | 0644 |
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irq.h | File | 841 B | 0644 |
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irqflags.h | File | 1.54 KB | 0644 |
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kprobes.h | File | 679 B | 0644 |
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linkage.h | File | 677 B | 0644 |
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mmu.h | File | 829 B | 0644 |
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mmu_context.h | File | 3.14 KB | 0644 |
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page.h | File | 3.76 KB | 0644 |
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pci.h | File | 1.16 KB | 0644 |
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pgalloc.h | File | 3.06 KB | 0644 |
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pgtable-32.h | File | 870 B | 0644 |
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pgtable-64.h | File | 2.08 KB | 0644 |
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pgtable-bits.h | File | 1.81 KB | 0644 |
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pgtable.h | File | 11.17 KB | 0644 |
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processor.h | File | 2.44 KB | 0644 |
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ptrace.h | File | 2.69 KB | 0644 |
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sbi.h | File | 2.6 KB | 0644 |
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smp.h | File | 1.59 KB | 0644 |
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spinlock.h | File | 2.85 KB | 0644 |
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spinlock_types.h | File | 906 B | 0644 |
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string.h | File | 838 B | 0644 |
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switch_to.h | File | 1.86 KB | 0644 |
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syscall.h | File | 2.59 KB | 0644 |
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thread_info.h | File | 3.11 KB | 0644 |
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timex.h | File | 1.29 KB | 0644 |
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tlb.h | File | 717 B | 0644 |
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tlbflush.h | File | 1.83 KB | 0644 |
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uaccess.h | File | 14 KB | 0644 |
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unistd.h | File | 638 B | 0644 |
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vdso.h | File | 1.49 KB | 0644 |
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word-at-a-time.h | File | 1.48 KB | 0644 |
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