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cmd/link: support trampoline insertion on ARM64

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Compared to ARM32 or PPC64, ARM64 has larger range for direct jumps.
But for very large programs it can still go over the limit. Add
trampoline insertion for ARM64.

Updates #40492.

Change-Id: Id97301dbc35fb577ba3f8d5f3316a8424d4f53c4
Reviewed-on: https://go-review.googlesource.com/c/go/+/314451
Trust: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
This commit is contained in:
Cherry Zhang 2021-04-26 22:25:20 -04:00
parent b15372f39b
commit f12dfeac89
3 changed files with 135 additions and 1 deletions
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2
src/cmd/link/link_test.go
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@ -618,7 +618,7 @@ func TestTrampoline(t *testing.T) {
// threshold for trampoline generation, and essentially all cross-package
// calls will use trampolines.
switch runtime.GOARCH {
case "arm", "ppc64", "ppc64le":
case "arm", "arm64", "ppc64", "ppc64le":
default:
t.Skipf("trampoline insertion is not implemented on %s", runtime.GOARCH)
}