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e2c0cdfba7
This patch contains code that is in some way visible to the user: including via system calls, the VDSO, module loading and signal handling. It also contains some generic code that is ABI visible. Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
/*
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* Copyright (C) 2012 Regents of the University of California
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* Copyright (C) 2014 Darius Rad <darius@bluespec.com>
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* Copyright (C) 2017 SiFive
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/syscalls.h>
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#include <asm/cmpxchg.h>
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#include <asm/unistd.h>
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static long riscv_sys_mmap(unsigned long addr, unsigned long len,
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unsigned long prot, unsigned long flags,
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unsigned long fd, off_t offset,
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unsigned long page_shift_offset)
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{
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if (unlikely(offset & (~PAGE_MASK >> page_shift_offset)))
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return -EINVAL;
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return sys_mmap_pgoff(addr, len, prot, flags, fd,
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offset >> (PAGE_SHIFT - page_shift_offset));
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}
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#ifdef CONFIG_64BIT
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SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
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unsigned long, prot, unsigned long, flags,
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unsigned long, fd, off_t, offset)
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{
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return riscv_sys_mmap(addr, len, prot, flags, fd, offset, 0);
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}
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#else
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SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
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unsigned long, prot, unsigned long, flags,
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unsigned long, fd, off_t, offset)
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{
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/*
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* Note that the shift for mmap2 is constant (12),
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* regardless of PAGE_SIZE
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*/
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return riscv_sys_mmap(addr, len, prot, flags, fd, offset, 12);
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}
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#endif /* !CONFIG_64BIT */
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