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Fix p{read,write}v{,v2}'s encoding of the offset argument on Linux. #896

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merged 1 commit into from Oct 25, 2023

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Unlike with p{read,write}, Linux's p{read,write}v syscall's offset argument is not passed in an endian-specific order. And, the expectation is for syscall wrappers to always pass both the high and low halves of the offset as separate arguments, even though on 64-bit architectures the low half is passed throgh as a 64-bit value containing the full offset and the kernel doesn't mask it.

And p{read,write}v2 follow the behavior of p{read,write}.

@sunfishcode sunfishcode force-pushed the sunfishcode/preadv2-offsets branch 2 times, most recently from d1fac5e to f749983 Compare October 25, 2023 14:15
Unlike with `p{read,write}`, Linux's `p{read,write}v` syscall's offset
argument is not passed in an endian-specific order. And, the expectation is
for syscall wrappers to always pass both the high and low halves of the
offset as separate arguments, even though on 64-bit architectures the low
half is passed throgh as a 64-bit value containing the full offset and the
kernel doesn't mask it.

And `p{read,write}v2` follow the behavior of `p{read,write}`.
@sunfishcode sunfishcode merged commit 1ab21e6 into main Oct 25, 2023
43 checks passed
@sunfishcode sunfishcode deleted the sunfishcode/preadv2-offsets branch October 25, 2023 15:31
sunfishcode added a commit that referenced this pull request Oct 25, 2023
…896)

Unlike with `p{read,write}`, Linux's `p{read,write}v` syscall's offset
argument is not passed in an endian-specific order. And, the expectation is
for syscall wrappers to always pass both the high and low halves of the
offset as separate arguments, even though on 64-bit architectures the low
half is passed throgh as a 64-bit value containing the full offset and the
kernel doesn't mask it.

And `p{read,write}v2` follow the behavior of `p{read,write}`.
sunfishcode added a commit that referenced this pull request Oct 25, 2023
…896)

Unlike with `p{read,write}`, Linux's `p{read,write}v` syscall's offset
argument is not passed in an endian-specific order. And, the expectation is
for syscall wrappers to always pass both the high and low halves of the
offset as separate arguments, even though on 64-bit architectures the low
half is passed throgh as a 64-bit value containing the full offset and the
kernel doesn't mask it.

And `p{read,write}v2` follow the behavior of `p{read,write}`.
sunfishcode added a commit that referenced this pull request Oct 25, 2023
…896)

Unlike with `p{read,write}`, Linux's `p{read,write}v` syscall's offset
argument is not passed in an endian-specific order. And, the expectation is
for syscall wrappers to always pass both the high and low halves of the
offset as separate arguments, even though on 64-bit architectures the low
half is passed throgh as a 64-bit value containing the full offset and the
kernel doesn't mask it.

And `p{read,write}v2` follow the behavior of `p{read,write}`.
sunfishcode added a commit that referenced this pull request Oct 25, 2023
…896)

Unlike with `p{read,write}`, Linux's `p{read,write}v` syscall's offset
argument is not passed in an endian-specific order. And, the expectation is
for syscall wrappers to always pass both the high and low halves of the
offset as separate arguments, even though on 64-bit architectures the low
half is passed throgh as a 64-bit value containing the full offset and the
kernel doesn't mask it.

And `p{read,write}v2` follow the behavior of `p{read,write}`.
sunfishcode added a commit that referenced this pull request Oct 25, 2023
…896)

Unlike with `p{read,write}`, Linux's `p{read,write}v` syscall's offset
argument is not passed in an endian-specific order. And, the expectation is
for syscall wrappers to always pass both the high and low halves of the
offset as separate arguments, even though on 64-bit architectures the low
half is passed throgh as a 64-bit value containing the full offset and the
kernel doesn't mask it.

And `p{read,write}v2` follow the behavior of `p{read,write}`.
sunfishcode added a commit that referenced this pull request Oct 25, 2023
…896)

Unlike with `p{read,write}`, Linux's `p{read,write}v` syscall's offset
argument is not passed in an endian-specific order. And, the expectation is
for syscall wrappers to always pass both the high and low halves of the
offset as separate arguments, even though on 64-bit architectures the low
half is passed throgh as a 64-bit value containing the full offset and the
kernel doesn't mask it.

And `p{read,write}v2` follow the behavior of `p{read,write}`.
sunfishcode added a commit that referenced this pull request Oct 25, 2023
…896)

Unlike with `p{read,write}`, Linux's `p{read,write}v` syscall's offset
argument is not passed in an endian-specific order. And, the expectation is
for syscall wrappers to always pass both the high and low halves of the
offset as separate arguments, even though on 64-bit architectures the low
half is passed throgh as a 64-bit value containing the full offset and the
kernel doesn't mask it.

And `p{read,write}v2` follow the behavior of `p{read,write}`.
sunfishcode added a commit that referenced this pull request Oct 25, 2023
…896)

Unlike with `p{read,write}`, Linux's `p{read,write}v` syscall's offset
argument is not passed in an endian-specific order. And, the expectation is
for syscall wrappers to always pass both the high and low halves of the
offset as separate arguments, even though on 64-bit architectures the low
half is passed throgh as a 64-bit value containing the full offset and the
kernel doesn't mask it.

And `p{read,write}v2` follow the behavior of `p{read,write}`.
sunfishcode added a commit that referenced this pull request Oct 25, 2023
…896)

Unlike with `p{read,write}`, Linux's `p{read,write}v` syscall's offset
argument is not passed in an endian-specific order. And, the expectation is
for syscall wrappers to always pass both the high and low halves of the
offset as separate arguments, even though on 64-bit architectures the low
half is passed throgh as a 64-bit value containing the full offset and the
kernel doesn't mask it.

And `p{read,write}v2` follow the behavior of `p{read,write}`.
sunfishcode added a commit that referenced this pull request Oct 25, 2023
…896)

Unlike with `p{read,write}`, Linux's `p{read,write}v` syscall's offset
argument is not passed in an endian-specific order. And, the expectation is
for syscall wrappers to always pass both the high and low halves of the
offset as separate arguments, even though on 64-bit architectures the low
half is passed throgh as a 64-bit value containing the full offset and the
kernel doesn't mask it.

And `p{read,write}v2` follow the behavior of `p{read,write}`.
sunfishcode added a commit that referenced this pull request Oct 25, 2023
…896)

Unlike with `p{read,write}`, Linux's `p{read,write}v` syscall's offset
argument is not passed in an endian-specific order. And, the expectation is
for syscall wrappers to always pass both the high and low halves of the
offset as separate arguments, even though on 64-bit architectures the low
half is passed throgh as a 64-bit value containing the full offset and the
kernel doesn't mask it.

And `p{read,write}v2` follow the behavior of `p{read,write}`.
sunfishcode added a commit that referenced this pull request Oct 25, 2023
…896)

Unlike with `p{read,write}`, Linux's `p{read,write}v` syscall's offset
argument is not passed in an endian-specific order. And, the expectation is
for syscall wrappers to always pass both the high and low halves of the
offset as separate arguments, even though on 64-bit architectures the low
half is passed throgh as a 64-bit value containing the full offset and the
kernel doesn't mask it.

And `p{read,write}v2` follow the behavior of `p{read,write}`.
sunfishcode added a commit that referenced this pull request Oct 25, 2023
…896)

Unlike with `p{read,write}`, Linux's `p{read,write}v` syscall's offset
argument is not passed in an endian-specific order. And, the expectation is
for syscall wrappers to always pass both the high and low halves of the
offset as separate arguments, even though on 64-bit architectures the low
half is passed throgh as a 64-bit value containing the full offset and the
kernel doesn't mask it.

And `p{read,write}v2` follow the behavior of `p{read,write}`.
sunfishcode added a commit that referenced this pull request Oct 25, 2023
…896)

Unlike with `p{read,write}`, Linux's `p{read,write}v` syscall's offset
argument is not passed in an endian-specific order. And, the expectation is
for syscall wrappers to always pass both the high and low halves of the
offset as separate arguments, even though on 64-bit architectures the low
half is passed throgh as a 64-bit value containing the full offset and the
kernel doesn't mask it.

And `p{read,write}v2` follow the behavior of `p{read,write}`.
sunfishcode added a commit that referenced this pull request Oct 25, 2023
…896)

Unlike with `p{read,write}`, Linux's `p{read,write}v` syscall's offset
argument is not passed in an endian-specific order. And, the expectation is
for syscall wrappers to always pass both the high and low halves of the
offset as separate arguments, even though on 64-bit architectures the low
half is passed throgh as a 64-bit value containing the full offset and the
kernel doesn't mask it.

And `p{read,write}v2` follow the behavior of `p{read,write}`.
sunfishcode added a commit that referenced this pull request Oct 25, 2023
…896) (#897)

Unlike with `p{read,write}`, Linux's `p{read,write}v` syscall's offset
argument is not passed in an endian-specific order. And, the expectation is
for syscall wrappers to always pass both the high and low halves of the
offset as separate arguments, even though on 64-bit architectures the low
half is passed throgh as a 64-bit value containing the full offset and the
kernel doesn't mask it.

And `p{read,write}v2` follow the behavior of `p{read,write}`.
sunfishcode added a commit that referenced this pull request Oct 25, 2023
…896) (#898)

Unlike with `p{read,write}`, Linux's `p{read,write}v` syscall's offset
argument is not passed in an endian-specific order. And, the expectation is
for syscall wrappers to always pass both the high and low halves of the
offset as separate arguments, even though on 64-bit architectures the low
half is passed throgh as a 64-bit value containing the full offset and the
kernel doesn't mask it.

And `p{read,write}v2` follow the behavior of `p{read,write}`.
sunfishcode added a commit that referenced this pull request Oct 25, 2023
…896) (#899)

Unlike with `p{read,write}`, Linux's `p{read,write}v` syscall's offset
argument is not passed in an endian-specific order. And, the expectation is
for syscall wrappers to always pass both the high and low halves of the
offset as separate arguments, even though on 64-bit architectures the low
half is passed throgh as a 64-bit value containing the full offset and the
kernel doesn't mask it.

And `p{read,write}v2` follow the behavior of `p{read,write}`.
@sunfishcode
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This is now released in rustix 0.38.21.

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