Editando: funcdata.h
// 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. // This file defines the IDs for PCDATA and FUNCDATA instructions // in Go binaries. It is included by assembly sources, so it must // be written using #defines. // // These must agree with internal/abi/symtab.go. #define PCDATA_UnsafePoint 0 #define PCDATA_StackMapIndex 1 #define PCDATA_InlTreeIndex 2 #define PCDATA_ArgLiveIndex 3 #define FUNCDATA_ArgsPointerMaps 0 /* garbage collector blocks */ #define FUNCDATA_LocalsPointerMaps 1 #define FUNCDATA_StackObjects 2 #define FUNCDATA_InlTree 3 #define FUNCDATA_OpenCodedDeferInfo 4 /* info for func with open-coded defers */ #define FUNCDATA_ArgInfo 5 #define FUNCDATA_ArgLiveInfo 6 #define FUNCDATA_WrapInfo 7 // Pseudo-assembly statements. // GO_ARGS, GO_RESULTS_INITIALIZED, and NO_LOCAL_POINTERS are macros // that communicate to the runtime information about the location and liveness // of pointers in an assembly function's arguments, results, and stack frame. // This communication is only required in assembly functions that make calls // to other functions that might be preempted or grow the stack. // NOSPLIT functions that make no calls do not need to use these macros. // GO_ARGS indicates that the Go prototype for this assembly function // defines the pointer map for the function's arguments. // GO_ARGS should be the first instruction in a function that uses it. // It can be omitted if there are no arguments at all. // GO_ARGS is inserted implicitly by the assembler for any function // whose package-qualified symbol name belongs to the current package; // it is therefore usually not necessary to write explicitly. #define GO_ARGS FUNCDATA $FUNCDATA_ArgsPointerMaps, go_args_stackmap(SB) // GO_RESULTS_INITIALIZED indicates that the assembly function // has initialized the stack space for its results and that those results // should be considered live for the remainder of the function. #define GO_RESULTS_INITIALIZED PCDATA $PCDATA_StackMapIndex, $1 // NO_LOCAL_POINTERS indicates that the assembly function stores // no pointers to heap objects in its local stack variables. #define NO_LOCAL_POINTERS FUNCDATA $FUNCDATA_LocalsPointerMaps, no_pointers_stackmap(SB) // 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. #define ArgsSizeUnknown 0x80000000
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