1dbcbcfca4
Recently, the gVisor project needs an instruction's address with 128 bytes alignment to fit the architecture requirement for interrupt table. This patch allows aligning an instruction's address to be aligned to a specific value (2^n and in the range [8, 2048]) The main changes include: 1. Adds a new element in the FuncInfo structure defined in cmd/internal/obj/link.go file to record the alignment information. 2. Adds a new element in the Func structure defined in cmd/internal/goobj/read.go file to read the alignment information. 3. Adds the assembler support to align an intruction's offset with a specific value (2^n and in the range [8, 2048]). e.g. "PCALIGN $256" indicates that the next instruction should be aligned to 256 bytes. 4. An instruction's alignment is relative to the start of the function where this instruction is located, so the function's address must be aligned to the same or coarser boundary. This CL also adds a test. Change-Id: I9b365c111b3a12f767728f1b45aa0c00f073c37d Reviewed-on: https://go-review.googlesource.com/c/go/+/226997 Reviewed-by: Bryan C. Mills <bcmills@google.com> Reviewed-by: Cherry Zhang <cherryyz@google.com> Run-TryBot: Bryan C. Mills <bcmills@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> |
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README.md
The Go Programming Language
Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.
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Contributing
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To contribute, please read the contribution guidelines: https://golang.org/doc/contribute.html
Note that the Go project uses the issue tracker for bug reports and proposals only. See https://golang.org/wiki/Questions for a list of places to ask questions about the Go language.