Update BPF lexer #2004
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Update BPF lexer #2004
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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 <[email protected]>
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 <[email protected]>
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 <[email protected]>
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 <[email protected]>
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 <[email protected]>
Jump instructions with a 32-bit offset are displayed as "gotol" instead of "goto". Signed-off-by: Paul Chaignon <[email protected]>
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Thank you for the contribution @pchaigno ❤️ The changes LGTM 🚀 |
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This pull request updates the BPF lexer to highlight several constructs and keywords that were either missed in the initial lexer or were recently added to BPF:
s8,s16,s32, ands64type keywords.call helper_namesyntax.le16,le32,le64and the newbswap16,bswap32,bswap64keywords.-0xa5syntax for negative hexadecimal.goto 0x1234 <label>syntax for jumps.gotolkeyword for long jumps.All come with visual examples.