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Clarify interaction of asm-goto with IBT #1790

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traviscross merged 2 commits into from
Apr 27, 2025
Merged

Clarify interaction of asm-goto with IBT #1790

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5ba6736
Move `asm!` noreturn + output example to correct location
nbdd0121 Apr 15, 2025
eea601a
Clarify interaction of asm-goto with IBT
nbdd0121 Apr 15, 2025
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Clarify interaction of asm-goto with IBT
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@nbdd0121
nbdd0121 committed Apr 26, 2025
commit eea601a96578f21f1e2fdc8ddfa41eeaeb7d522f
1 change: 1 addition & 0 deletions src/inline-assembly.md
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Expand Up @@ -371,6 +371,7 @@ assert_eq!(y, [3, 2, 0, 1]);
r[asm.operand-type.supported-operands.label]
* `label <block>`
- The address of the block is substituted into the asm template string. The assembly code may jump to the substituted address.
- For targets that distinguish between direct jumps and indirect jumps (e.g. x86-64 with `cf-protection` enabled), the assembly code must not jump to the substituted address indirectly.
- After execution of the block, the `asm!` expression returns.
- The type of the block must be unit or `!` (never).
- The block starts a new safety context; unsafe operations within the `label` block must be wrapped in an inner `unsafe` block, even though the entire `asm!` expression is already wrapped in `unsafe`.
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