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Update BPF lexer #2004

Merged
merged 6 commits into from
Oct 24, 2023
Merged

Update BPF lexer #2004

merged 6 commits into from
Oct 24, 2023

Commits on Oct 20, 2023

  1. bpf: highlight signed type keywords 

    Signed type keywords such as s16 have always been supported by BPF but
recently became more frequent. They were missing in the original lexer
so this commit adds them, with an example.

Signed-off-by: Paul Chaignon <paul.chaignon@gmail.com>
    @pchaigno
    pchaigno committed Oct 20, 2023
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  2. bpf: highlight simpler call syntax 

    The lexer already supports the following syntax for call instructions:

    call bpf_skb_load_bytes#1234

but a simpler syntax without the number at the end is now also possible.
This commit adds support for it, with an example.

Signed-off-by: Paul Chaignon <paul.chaignon@gmail.com>
    @pchaigno
    pchaigno committed Oct 20, 2023
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  3. bpf: highlight all byte-swapping instructions 

    The original lexer was missing support for the little-endian
byte-swapping instructions le{16,32,64}. This commit adds them, together
with the new bswap{16,32,64} instructions. The later are unconditional
byte-swapping instructions, meaning they don't depend on the
architecture.

Signed-off-by: Paul Chaignon <paul.chaignon@gmail.com>
    @pchaigno
    pchaigno committed Oct 20, 2023
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  4. bpf: fix highlight of negative hexadecimal numbers 

    Hexadecimal literals can also have a sign in BPF. This commit fixes this
error in the lexer and adds a corresponding example.

Signed-off-by: Paul Chaignon <paul.chaignon@gmail.com>
    @pchaigno
    pchaigno committed Oct 20, 2023
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  5. bpf: highlight hexadecimal jump offsets 

    The offset of BPF jump instructions is now sometimes displayed in
hexadecimal format. This commit adds support for that, together with an
example. It also adds an example to cover the syntax where the jump has
both an offset literal and an offset label (ex. "+1 <LBB0_2>").

Signed-off-by: Paul Chaignon <paul.chaignon@gmail.com>
    @pchaigno
    pchaigno committed Oct 20, 2023
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  6. bpf: highlight long jumps 

    Jump instructions with a 32-bit offset are displayed as "gotol" instead
of "goto".

Signed-off-by: Paul Chaignon <paul.chaignon@gmail.com>
    @pchaigno
    pchaigno committed Oct 20, 2023
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