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Paul E. Murphy 1ed636dc97 cmd/link/internal/ppc64: fix trampoline reuse distance calculation
If a compatible trampoline has been inserted by a previously laid
function in the same section, and is known to be sufficiently close,
it can be reused.

When testing if the trampoline can be reused, the addend of the direct
call should be ignored. It is already encoded in the trampoline. If the
addend is non-zero, and the target sufficiently far away, and just
beyond direct call reach, this may cause the trampoline to be
incorrectly reused.

This was observed on go1.17.13 and openshift-installer commit f3c53b382
building in release mode with the following error:

github.com/aliyun/alibaba-cloud-sdk-go/services/cms.(*Client).DescribeMonitoringAgentAccessKeyWithChan.func1: direct call too far: runtime.duffzero+1f0-tramp0-1 -2000078

Fixes #56775

Change-Id: I54af957302506d4e3cd5d3121542c83fe980e912
Reviewed-on: https://go-review.googlesource.com/c/go/+/451415
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Paul Murphy <murp@ibm.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Than McIntosh <thanm@google.com>
2022-11-18 14:31:23 +00:00
.github .github: update issue label for pkgsite-removal 2022-09-07 16:00:20 +00:00
api archive/tar, archive/zip: return ErrInsecurePath for unsafe paths 2022-11-16 23:36:48 +00:00
doc archive/tar, archive/zip: return ErrInsecurePath for unsafe paths 2022-11-16 23:36:48 +00:00
lib/time lib/time, time/tzdata: update to 2022b 2022-08-11 20:03:19 +00:00
misc misc/cgo/test: skip Test9400 on Alpine 2022-11-07 21:15:29 +00:00
src cmd/link/internal/ppc64: fix trampoline reuse distance calculation 2022-11-18 14:31:23 +00:00
test cmd/compile: fix wrong optimization for eliding Not in Phi 2022-11-18 13:26:33 +00:00
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README.md README: update from CC-BY-3.0 to CC-BY-4.0 2022-11-02 20:14:56 +00:00
SECURITY.md SECURITY.md: replace golang.org with go.dev 2022-04-26 19:59:47 +00:00

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