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liblink, cmd/ld, runtime: remove stackguard1

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Now that we've removed all the C code in runtime and the C compilers,
there is no need to have a separate stackguard field to check for C
code on Go stack.

Remove field g.stackguard1 and rename g.stackguard0 to g.stackguard.
Adjust liblink and cmd/ld as necessary.

Change-Id: I54e75db5a93d783e86af5ff1a6cd497d669d8d33
Reviewed-on: https://go-review.googlesource.com/2144
Reviewed-by: Keith Randall <khr@golang.org>
This commit is contained in:
Shenghou Ma 2014-12-29 01:08:40 -05:00 • committed by Keith Randall
parent 3b76b017ca
commit ab0535ae3f
27 changed files with 72 additions and 192 deletions
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6
src/runtime/malloc.go
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@ -64,7 +64,7 @@ func mallocgc(size uintptr, typ *_type, flags uint32) unsafe.Pointer {
}
mp.mallocing = 1
if mp.curg != nil {
mp.curg.stackguard0 = ^uintptr(0xfff) | 0xbad
mp.curg.stackguard = ^uintptr(0xfff) | 0xbad
}
}
@ -127,7 +127,7 @@ func mallocgc(size uintptr, typ *_type, flags uint32) unsafe.Pointer {
}
mp.mallocing = 0
if mp.curg != nil {
mp.curg.stackguard0 = mp.curg.stack.lo + _StackGuard
mp.curg.stackguard = mp.curg.stack.lo + _StackGuard
}
// Note: one releasem for the acquirem just above.
// The other for the acquirem at start of malloc.
@ -319,7 +319,7 @@ marked:
}
mp.mallocing = 0
if mp.curg != nil {
mp.curg.stackguard0 = mp.curg.stack.lo + _StackGuard
mp.curg.stackguard = mp.curg.stack.lo + _StackGuard
}
// Note: one releasem for the acquirem just above.
// The other for the acquirem at start of malloc.