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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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// This file defines the IDs for PCDATA and FUNCDATA instructions

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// in Go binaries. It is included by assembly sources, so it must

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// be written using #defines.

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// These must agree with internal/abi/symtab.go.

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#define PCDATA_UnsafePoint 0

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#define PCDATA_StackMapIndex 1

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#define PCDATA_InlTreeIndex 2

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#define PCDATA_ArgLiveIndex 3

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#define FUNCDATA_ArgsPointerMaps 0 /* garbage collector blocks */

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#define FUNCDATA_LocalsPointerMaps 1

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#define FUNCDATA_StackObjects 2

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#define FUNCDATA_InlTree 3

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#define FUNCDATA_OpenCodedDeferInfo 4 /* info for func with open-coded defers */

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#define FUNCDATA_ArgInfo 5

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#define FUNCDATA_ArgLiveInfo 6

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#define FUNCDATA_WrapInfo 7

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// Pseudo-assembly statements.

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// GO_ARGS, GO_RESULTS_INITIALIZED, and NO_LOCAL_POINTERS are macros

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// that communicate to the runtime information about the location and liveness

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// of pointers in an assembly function's arguments, results, and stack frame.

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// This communication is only required in assembly functions that make calls

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// to other functions that might be preempted or grow the stack.

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// NOSPLIT functions that make no calls do not need to use these macros.

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// GO_ARGS indicates that the Go prototype for this assembly function

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// defines the pointer map for the function's arguments.

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// GO_ARGS should be the first instruction in a function that uses it.

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// It can be omitted if there are no arguments at all.

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// GO_ARGS is inserted implicitly by the linker for any function whose

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// name starts with a middle-dot and that also has a Go prototype; it

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// is therefore usually not necessary to write explicitly.

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#define GO_ARGS FUNCDATA $FUNCDATA_ArgsPointerMaps, go_args_stackmap(SB)

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// GO_RESULTS_INITIALIZED indicates that the assembly function

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// has initialized the stack space for its results and that those results

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// should be considered live for the remainder of the function.

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#define GO_RESULTS_INITIALIZED PCDATA $PCDATA_StackMapIndex, $1

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// NO_LOCAL_POINTERS indicates that the assembly function stores

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// no pointers to heap objects in its local stack variables.

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#define NO_LOCAL_POINTERS FUNCDATA $FUNCDATA_LocalsPointerMaps, no_pointers_stackmap(SB)

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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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#define ArgsSizeUnknown 0x80000000

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