diff options
Diffstat (limited to 'vendor/github.com/google/gops/internal/obj/funcdata.go')
| -rw-r--r-- | vendor/github.com/google/gops/internal/obj/funcdata.go | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/vendor/github.com/google/gops/internal/obj/funcdata.go b/vendor/github.com/google/gops/internal/obj/funcdata.go new file mode 100644 index 00000000..62256a3e --- /dev/null +++ b/vendor/github.com/google/gops/internal/obj/funcdata.go @@ -0,0 +1,48 @@ +// 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 obj + +// 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. +// +// The Go compiler also #includes this file, for now. +// +// symtab.go also contains a copy of these constants. + +// 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 linker for any function +// that also has a Go prototype and therefore is usually not necessary +// to write explicitly. + +// 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. + +// NO_LOCAL_POINTERS indicates that the assembly function stores +// no pointers to heap objects in its local stack variables. + +// 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. +const ( + PCDATA_StackMapIndex = 0 + FUNCDATA_ArgsPointerMaps = 0 + FUNCDATA_LocalsPointerMaps = 1 + ArgsSizeUnknown = -0x80000000 +) |