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| author | Cherry Zhang <cherryyz@google.com> | 2021-02-02 18:20:16 -0500 |
|---|---|---|
| committer | Cherry Zhang <cherryyz@google.com> | 2021-02-08 16:30:07 +0000 |
| commit | 5d7dc53888c3c91ef4122d584a064bc24b6f7540 (patch) | |
| tree | a5b39dc4d83aa2fb9c72762968b0d0fc0bb65aea /src/runtime/sys_linux_amd64.s | |
| parent | a21de9ec73b8a433cafd336448dc8111a4e4571e (diff) | |
| download | go-5d7dc53888c3c91ef4122d584a064bc24b6f7540.tar.xz | |
[dev.regabi] cmd/compile, runtime: reserve R14 as g registers on AMD64
This is a proof-of-concept change for using the g register on
AMD64. getg is now lowered to R14 in the new ABI. The g register
is not yet used in all places where it can be used (e.g. stack
bounds check, runtime assembly code).
Change-Id: I10123ddf38e31782cf58bafcdff170aee0ff0d1b
Reviewed-on: https://go-review.googlesource.com/c/go/+/289196
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>
Reviewed-by: David Chase <drchase@google.com>
Diffstat (limited to 'src/runtime/sys_linux_amd64.s')
| -rw-r--r-- | src/runtime/sys_linux_amd64.s | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/runtime/sys_linux_amd64.s b/src/runtime/sys_linux_amd64.s index 37cb8dad03..b0a201fc6f 100644 --- a/src/runtime/sys_linux_amd64.s +++ b/src/runtime/sys_linux_amd64.s @@ -632,6 +632,7 @@ nog1: get_tls(CX) MOVQ R13, g_m(R9) MOVQ R9, g(CX) + MOVQ R9, R14 // set g register CALL runtime·stackcheck(SB) nog2: |