diff options
Diffstat (limited to 'src/runtime/stack.go')
| -rw-r--r-- | src/runtime/stack.go | 14 |
1 files changed, 1 insertions, 13 deletions
diff --git a/src/runtime/stack.go b/src/runtime/stack.go index e1e6c7e82a..39dbed5114 100644 --- a/src/runtime/stack.go +++ b/src/runtime/stack.go @@ -85,13 +85,6 @@ const ( _FixedStack6 = _FixedStack5 | (_FixedStack5 >> 16) _FixedStack = _FixedStack6 + 1 - // Functions that need frames bigger than this use an extra - // instruction to do the stack split check, to avoid overflow - // in case SP - framesize wraps below zero. - // This value can be no bigger than the size of the unmapped - // space at zero. - _StackBig = 4096 - // The stack guard is a pointer this many bytes above the // bottom of the stack. // @@ -101,15 +94,10 @@ const ( // This arithmetic must match that in cmd/internal/objabi/stack.go:StackLimit. _StackGuard = 928*sys.StackGuardMultiplier + _StackSystem - // After a stack split check the SP is allowed to be this - // many bytes below the stack guard. This saves an instruction - // in the checking sequence for tiny frames. - _StackSmall = 128 - // The maximum number of bytes that a chain of NOSPLIT // functions can use. // This arithmetic must match that in cmd/internal/objabi/stack.go:StackLimit. - _StackLimit = _StackGuard - _StackSystem - _StackSmall + _StackLimit = _StackGuard - _StackSystem - abi.StackSmall ) const ( |