1 // Inferno utils/5c/list.c 2 // http://code.google.com/p/inferno-os/source/browse/utils/5c/list.c 3 // 4 // Copyright 1994-1999 Lucent Technologies Inc. All rights reserved. 5 // Portions Copyright 1995-1997 C H Forsyth (forsyth (a] terzarima.net) 6 // Portions Copyright 1997-1999 Vita Nuova Limited 7 // Portions Copyright 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com) 8 // Portions Copyright 2004,2006 Bruce Ellis 9 // Portions Copyright 2005-2007 C H Forsyth (forsyth (a] terzarima.net) 10 // Revisions Copyright 2000-2007 Lucent Technologies Inc. and others 11 // Portions Copyright 2009 The Go Authors. All rights reserved. 12 // 13 // Permission is hereby granted, free of charge, to any person obtaining a copy 14 // of this software and associated documentation files (the "Software"), to deal 15 // in the Software without restriction, including without limitation the rights 16 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 17 // copies of the Software, and to permit persons to whom the Software is 18 // furnished to do so, subject to the following conditions: 19 // 20 // The above copyright notice and this permission notice shall be included in 21 // all copies or substantial portions of the Software. 22 // 23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 24 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 25 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 26 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 27 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 28 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 29 // THE SOFTWARE. 30 31 package obj 32 33 // Copyright 2013 The Go Authors. All rights reserved. 34 // Use of this source code is governed by a BSD-style 35 // license that can be found in the LICENSE file. 36 37 // This file defines the IDs for PCDATA and FUNCDATA instructions 38 // in Go binaries. It is included by assembly sources, so it must 39 // be written using #defines. 40 // 41 // The Go compiler also #includes this file, for now. 42 // 43 // symtab.go also contains a copy of these constants. 44 45 // Pseudo-assembly statements. 46 47 // GO_ARGS, GO_RESULTS_INITIALIZED, and NO_LOCAL_POINTERS are macros 48 // that communicate to the runtime information about the location and liveness 49 // of pointers in an assembly function's arguments, results, and stack frame. 50 // This communication is only required in assembly functions that make calls 51 // to other functions that might be preempted or grow the stack. 52 // NOSPLIT functions that make no calls do not need to use these macros. 53 54 // GO_ARGS indicates that the Go prototype for this assembly function 55 // defines the pointer map for the function's arguments. 56 // GO_ARGS should be the first instruction in a function that uses it. 57 // It can be omitted if there are no arguments at all. 58 // GO_ARGS is inserted implicitly by the linker for any function 59 // that also has a Go prototype and therefore is usually not necessary 60 // to write explicitly. 61 62 // GO_RESULTS_INITIALIZED indicates that the assembly function 63 // has initialized the stack space for its results and that those results 64 // should be considered live for the remainder of the function. 65 66 // NO_LOCAL_POINTERS indicates that the assembly function stores 67 // no pointers to heap objects in its local stack variables. 68 69 // ArgsSizeUnknown is set in Func.argsize to mark all functions 70 // whose argument size is unknown (C vararg functions, and 71 // assembly code without an explicit specification). 72 // This value is generated by the compiler, assembler, or linker. 73 const ( 74 PCDATA_StackMapIndex = 0 75 FUNCDATA_ArgsPointerMaps = 0 76 FUNCDATA_LocalsPointerMaps = 1 77 FUNCDATA_DeadValueMaps = 2 78 ArgsSizeUnknown = -0x80000000 79 ) 80
