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295f10061a
Most architectures that implement the old-style mmap() with byte offset use 'unsigned long' as the type for that offset, but microblaze and riscv have the off_t type that is shared with userspace, matching the prototype in include/asm-generic/syscalls.h. Make this consistent by using an unsigned argument everywhere. This changes the behavior slightly, as the argument is shifted to a page number, and an user input with the top bit set would result in a negative page offset rather than a large one as we use elsewhere. For riscv, the 32-bit sys_mmap2() definition actually used a custom type that is different from the global declaration, but this was missed due to an incorrect type check. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
43 lines
886 B
C
43 lines
886 B
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
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#include <linux/syscalls.h>
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SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
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{
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struct thread_info *ti = task_thread_info(current);
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struct pt_regs *reg = current_pt_regs();
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reg->tls = addr;
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ti->tp_value = addr;
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return 0;
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}
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SYSCALL_DEFINE6(mmap2,
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unsigned long, addr,
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unsigned long, len,
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unsigned long, prot,
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unsigned long, flags,
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unsigned long, fd,
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unsigned long, offset)
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{
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if (unlikely(offset & (~PAGE_MASK >> 12)))
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return -EINVAL;
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return ksys_mmap_pgoff(addr, len, prot, flags, fd,
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offset >> (PAGE_SHIFT - 12));
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}
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/*
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* for abiv1 the 64bits args should be even th, So we need mov the advice
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* forward.
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*/
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SYSCALL_DEFINE4(csky_fadvise64_64,
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int, fd,
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int, advice,
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loff_t, offset,
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loff_t, len)
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{
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return ksys_fadvise64_64(fd, offset, len, advice);
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}
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