gotosocial/vendor/github.com/twitchyliquid64/golang-asm/objabi/funcdata.go
2023-02-25 12:12:40 +00:00

54 lines
1.8 KiB
Go

// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package objabi
// This file defines the IDs for PCDATA and FUNCDATA instructions
// in Go binaries.
//
// These must agree with ../../../runtime/funcdata.h and
// ../../../runtime/symtab.go.
const (
PCDATA_RegMapIndex = 0 // if !go115ReduceLiveness
PCDATA_UnsafePoint = 0 // if go115ReduceLiveness
PCDATA_StackMapIndex = 1
PCDATA_InlTreeIndex = 2
FUNCDATA_ArgsPointerMaps = 0
FUNCDATA_LocalsPointerMaps = 1
FUNCDATA_RegPointerMaps = 2 // if !go115ReduceLiveness
FUNCDATA_StackObjects = 3
FUNCDATA_InlTree = 4
FUNCDATA_OpenCodedDeferInfo = 5
// ArgsSizeUnknown is set in Func.argsize to mark all functions
// whose argument size is unknown (C vararg functions, and
// assembly code without an explicit specification).
// This value is generated by the compiler, assembler, or linker.
ArgsSizeUnknown = -0x80000000
)
// Special PCDATA values.
const (
// PCDATA_RegMapIndex values.
//
// Only if !go115ReduceLiveness.
PCDATA_RegMapUnsafe = PCDATA_UnsafePointUnsafe // Unsafe for async preemption
// PCDATA_UnsafePoint values.
PCDATA_UnsafePointSafe = -1 // Safe for async preemption
PCDATA_UnsafePointUnsafe = -2 // Unsafe for async preemption
// PCDATA_Restart1(2) apply on a sequence of instructions, within
// which if an async preemption happens, we should back off the PC
// to the start of the sequence when resuming.
// We need two so we can distinguish the start/end of the sequence
// in case that two sequences are next to each other.
PCDATA_Restart1 = -3
PCDATA_Restart2 = -4
// Like PCDATA_Restart1, but back to function entry if async preempted.
PCDATA_RestartAtEntry = -5
)