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[sysvabi64] Make it clear that an escaped address must be live.
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An address may be in registers or memory, but not live, the
object producer may assume that this address does not require
a BTI.
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@smithp35
smithp35 committed Nov 14, 2024
1 parent 96aa942 commit b1d10d3
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6 changes: 3 additions & 3 deletions sysvabi64/sysvabi64.rst
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Expand Up @@ -1698,9 +1698,9 @@ the destination of an indirect branch originating in the same
relocatable object.

A relocatable object producer is required to add a BTI instruction to
a location when the address of that location escapes out of the
relocatable object. This includes the locations of all symbols that
can be exported into the dynamic symbol table by a static linker.
a location when the address of that location is live and escapes out
of the relocatable object. This includes the locations of all symbols
that can be exported into the dynamic symbol table by a static linker.

A static linker is required to generate `Custom PLTs`_ with BTI
instructions.
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