5abda2618b
Mach-O relocation addend is signed 24-bit. When external linking, if the addend is larger, we cannot put it directly into a Mach-O relocation. This CL handles large addend by creating "label" symbols at sym+0x800000, sym+(0x800000*2), etc., and emitting Mach-O relocations that target the label symbols with a smaller addend. The label symbols are generated late (similar to what we do for RISC-V64). One complexity comes from handling of carrier symbols, which does not track its size or its inner symbols. But relocations can target them. We track them in a side table (similar to what we do for XCOFF, xcoffUpdateOuterSize). Fixes #42738. Change-Id: I8c53ab2397f8b88870d26f00e9026285e5ff5584 Reviewed-on: https://go-review.googlesource.com/c/go/+/278332 Trust: Cherry Zhang <cherryyz@google.com> Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Than McIntosh <thanm@google.com> |
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