diff options
Diffstat (limited to 'src/runtime/runtime2.go')
| -rw-r--r-- | src/runtime/runtime2.go | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/runtime/runtime2.go b/src/runtime/runtime2.go index 83252abb44..b58255f279 100644 --- a/src/runtime/runtime2.go +++ b/src/runtime/runtime2.go @@ -437,6 +437,7 @@ type g struct { sched gobuf syscallsp uintptr // if status==Gsyscall, syscallsp = sched.sp to use during gc syscallpc uintptr // if status==Gsyscall, syscallpc = sched.pc to use during gc + syscallbp uintptr // if status==Gsyscall, syscallbp = sched.bp to use in fpTraceback stktopsp uintptr // expected sp at top of stack, to check in traceback // param is a generic pointer parameter field used to pass // values in particular contexts where other storage for the @@ -1263,3 +1264,17 @@ var ( // Must agree with internal/buildcfg.FramePointerEnabled. const framepointer_enabled = GOARCH == "amd64" || GOARCH == "arm64" + +// getcallerfp returns the frame pointer of the caller of the caller +// of this function. +// +//go:nosplit +//go:noinline +func getcallerfp() uintptr { + fp := getfp() // This frame's FP. + if fp != 0 { + fp = *(*uintptr)(unsafe.Pointer(fp)) // The caller's FP. + fp = *(*uintptr)(unsafe.Pointer(fp)) // The caller's caller's FP. + } + return fp +} |