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