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The expression may either include integers/consts or reference other
fields in the structure via value[field1:field2:field3].
The fields on this path must all belong to structures and must not have
any if conditions themselves.
For unions, mandate that the last field has no conditions (it will be
the default one).
For structs, convert conditional fields into fields of a union type of
the following form:
anonymous_union [
value T (if[expression])
void void
]
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1) Make FabricateSyscallConsts() operate on ConstFile.
2) Expose Pos inside ConstInfo.
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We use strings to identify OS/Arch.
These strings are duplicated throughout the code base massively.
golangci-lint points to possiblity of typos and duplication.
We already had to define these names in pkg/csource
and disable checking for prog package. A future change triggers
such warnings in another package.
Add OS/Arch name consts to sys/targets so that they can be used
to refer to OS/Arch. Use the consts everywhere.
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Add errors3.txt with tests for errors that are produced during generation phase.
Refactor tests to reduce duplication.
Tidy struct/union size errors: better locations and make testable.
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Enables the syntax intN[start:end, alignment] for integer ranges. For
instance, int32[0:10, 2] represents even 32-bit numbers between 0 and 10
included. With this change, two NEED tags in syscall descriptions can be
addressed.
Signed-off-by: Paul Chaignon <paul.chaignon@orange.com>
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Error on unused structs/unions/resources/flags.
Finds tons of bugs.
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The size attribute allows to pad a struct up to the specified size.
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Netlink descriptions contain tons of code duplication,
and need much more for proper descriptions. Introduce
type templates to simplify writing such descriptions
and remove code duplication.
Note: type templates are experimental, have poor error handling
and are subject to change.
Type templates can be declared as follows:
```
type buffer[DIR] ptr[DIR, array[int8]]
type fileoff[BASE] BASE
type nlattr[TYPE, PAYLOAD] {
nla_len len[parent, int16]
nla_type const[TYPE, int16]
payload PAYLOAD
} [align_4]
```
and later used as follows:
```
syscall(a buffer[in], b fileoff[int64], c ptr[in, nlattr[FOO, int32]])
```
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Update #217
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