[go] runtime/cgo: add abi_riscv64.h for callee-saved register macros

[Quim Muntal (Gerrit)]

Quim Muntal submitted the change

Change information

Commit message:

runtime/cgo: add abi_riscv64.h for callee-saved register macros

Add abi_riscv64.h with SAVE_GPR/SAVE_FPR macros for saving and
restoring the RISC-V callee-saved registers, following the pattern
established by the other abi_*.h headers.

Refactor asm_riscv64.s (cgo crosscall2), asm_riscv64.s (runtime
_rt0_riscv64_lib), and race_riscv64.s (racecallbackthunk) to use
the new macros, replacing inline register save/restore sequences.

Change-Id: I83cef17a35c57fc8b5e045e7181460283ae5b423

Reviewed-on: https://go-review.googlesource.com/c/go/+/749900

Reviewed-by: David Chase <drc...@google.com>

LUCI-TryBot-Result: Go LUCI <golang...@luci-project-accounts.iam.gserviceaccount.com>

Reviewed-by: Quim Muntal <quimm...@gmail.com>

Reviewed-by: Russ Cox <r...@golang.org>

Files:

• M src/runtime/asm_riscv64.s
• A src/runtime/cgo/abi_riscv64.h
• M src/runtime/cgo/asm_riscv64.s
• M src/runtime/race_riscv64.s

Change size: M

Delta: 4 files changed, 89 insertions(+), 144 deletions(-)

Branch: refs/heads/master

Submit Requirements:

• Code-Review: +1 by Russ Cox, +2 by Quim Muntal, +2 by David Chase
• TryBots-Pass: LUCI-TryBot-Result+1 by Go LUCI

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Gerrit

Gerrit-MessageType: merged

Gerrit-Project: go

Gerrit-Branch: master

Gerrit-Change-Id: I83cef17a35c57fc8b5e045e7181460283ae5b423

Gerrit-Change-Number: 749900

Gerrit-PatchSet: 5

Gerrit-Owner: George Adams <georgea...@gmail.com>

Gerrit-Reviewer: David Chase <drc...@google.com>

Gerrit-Reviewer: Go LUCI <golang...@luci-project-accounts.iam.gserviceaccount.com>

Gerrit-Reviewer: Michael Pratt <mpr...@google.com>

Gerrit-Reviewer: Quim Muntal <quimm...@gmail.com>

Gerrit-Reviewer: Russ Cox <r...@golang.org>