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compat: Create compat_sys_p{read,write}v64
For 32-bit ABIs which have real 64-bit registers, we don't want to break the position argument into two. However, we still need compat support to deal with 32-bit pointers, so we can't just use sys_p{read,write} directly. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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parent
ff88943a14
commit
4ee5c0d05c
26
fs/compat.c
26
fs/compat.c
@ -1177,10 +1177,9 @@ compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec,
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}
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asmlinkage ssize_t
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compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec,
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unsigned long vlen, u32 pos_low, u32 pos_high)
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compat_sys_preadv64(unsigned long fd, const struct compat_iovec __user *vec,
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unsigned long vlen, loff_t pos)
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{
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loff_t pos = ((loff_t)pos_high << 32) | pos_low;
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struct file *file;
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int fput_needed;
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ssize_t ret;
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@ -1197,6 +1196,14 @@ compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec,
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return ret;
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}
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asmlinkage ssize_t
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compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec,
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unsigned long vlen, u32 pos_low, u32 pos_high)
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{
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loff_t pos = ((loff_t)pos_high << 32) | pos_low;
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return compat_sys_preadv64(fd, vec, vlen, pos);
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}
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static size_t compat_writev(struct file *file,
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const struct compat_iovec __user *vec,
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unsigned long vlen, loff_t *pos)
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@ -1236,10 +1243,9 @@ compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec,
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}
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asmlinkage ssize_t
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compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec,
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unsigned long vlen, u32 pos_low, u32 pos_high)
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compat_sys_pwritev64(unsigned long fd, const struct compat_iovec __user *vec,
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unsigned long vlen, loff_t pos)
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{
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loff_t pos = ((loff_t)pos_high << 32) | pos_low;
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struct file *file;
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int fput_needed;
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ssize_t ret;
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@ -1256,6 +1262,14 @@ compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec,
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return ret;
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}
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asmlinkage ssize_t
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compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec,
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unsigned long vlen, u32 pos_low, u32 pos_high)
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{
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loff_t pos = ((loff_t)pos_high << 32) | pos_low;
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return compat_sys_pwritev64(fd, vec, vlen, pos);
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}
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asmlinkage long
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compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
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unsigned int nr_segs, unsigned int flags)
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