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runtime: fix lfstackUnpack on ia64

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The top three region number bits must be masked out before
    right-shifting the address bits into place, otherwise they will be
    copied down into the lower always-zero address bits.
    
    Reviewed-on: https://go-review.googlesource.com/84535

From-SVN: r257061
This commit is contained in:
Ian Lance Taylor 2018-01-25 17:44:19 +00:00
parent 19e502d413
commit a88d1f8bb2
2 changed files with 2 additions and 2 deletions
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2
gcc/go/gofrontend/MERGE
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@ -1,4 +1,4 @@
016ea21c4cba324c6ea6424da7988c6f985e671b
553e04735d1be372c596c720bcaea27e050b13a6
The first line of this file holds the git revision number of the last
merge done from the gofrontend repository.

2
libgo/go/runtime/lfstack_64bit.go
View file

@ -78,7 +78,7 @@ func lfstackUnpack(val uint64) *lfnode {
return (*lfnode)(unsafe.Pointer(uintptr(int64(val) >> sparcLinuxCntBits << 3)))
}
if GOARCH == "ia64" {
return (*lfnode)(unsafe.Pointer(uintptr((val>>ia64CntBits<<3)&(1<<(64-3)-1) | val&^(1<<(64-3)-1))))
return (*lfnode)(unsafe.Pointer(uintptr(((val & (1<<(64-3) - 1)) >> ia64CntBits << 3) | val&^(1<<(64-3)-1))))
}
if GOARCH == "ppc64" && GOOS == "aix" {
if val&(1<<63) != 0 {