| // Derived from Inferno utils/6l/l.h and related files. | |
| // https://bitbucket.org/inferno-os/inferno-os/src/default/utils/6l/l.h | |
| // | |
| // Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved. | |
| // Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net) | |
| // Portions Copyright © 1997-1999 Vita Nuova Limited | |
| // Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com) | |
| // Portions Copyright © 2004,2006 Bruce Ellis | |
| // Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net) | |
| // Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others | |
| // Portions Copyright © 2009 The Go Authors. All rights reserved. | |
| // | |
| // Permission is hereby granted, free of charge, to any person obtaining a copy | |
| // of this software and associated documentation files (the "Software"), to deal | |
| // in the Software without restriction, including without limitation the rights | |
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
| // copies of the Software, and to permit persons to whom the Software is | |
| // furnished to do so, subject to the following conditions: | |
| // | |
| // The above copyright notice and this permission notice shall be included in | |
| // all copies or substantial portions of the Software. | |
| // | |
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
| // THE SOFTWARE. | |
| package sym | |
| // A SymKind describes the kind of memory represented by a symbol. | |
| type SymKind uint8 | |
| // Defined SymKind values. | |
| // | |
| // TODO(rsc): Give idiomatic Go names. | |
| //go:generate stringer -type=SymKind | |
| const ( | |
| Sxxx SymKind = iota | |
| STEXT | |
| SELFRXSECT | |
| // Read-only sections. | |
| STYPE | |
| SSTRING | |
| SGOSTRING | |
| SGOFUNC | |
| SGCBITS | |
| SRODATA | |
| SFUNCTAB | |
| SELFROSECT | |
| SMACHOPLT | |
| // Read-only sections with relocations. | |
| // | |
| // Types STYPE-SFUNCTAB above are written to the .rodata section by default. | |
| // When linking a shared object, some conceptually "read only" types need to | |
| // be written to by relocations and putting them in a section called | |
| // ".rodata" interacts poorly with the system linkers. The GNU linkers | |
| // support this situation by arranging for sections of the name | |
| // ".data.rel.ro.XXX" to be mprotected read only by the dynamic linker after | |
| // relocations have applied, so when the Go linker is creating a shared | |
| // object it checks all objects of the above types and bumps any object that | |
| // has a relocation to it to the corresponding type below, which are then | |
| // written to sections with appropriate magic names. | |
| STYPERELRO | |
| SSTRINGRELRO | |
| SGOSTRINGRELRO | |
| SGOFUNCRELRO | |
| SGCBITSRELRO | |
| SRODATARELRO | |
| SFUNCTABRELRO | |
| // Part of .data.rel.ro if it exists, otherwise part of .rodata. | |
| STYPELINK | |
| SITABLINK | |
| SSYMTAB | |
| SPCLNTAB | |
| // Writable sections. | |
| SELFSECT | |
| SMACHO | |
| SMACHOGOT | |
| SWINDOWS | |
| SELFGOT | |
| SNOPTRDATA | |
| SINITARR | |
| SDATA | |
| SBSS | |
| SNOPTRBSS | |
| STLSBSS | |
| SXREF | |
| SMACHOSYMSTR | |
| SMACHOSYMTAB | |
| SMACHOINDIRECTPLT | |
| SMACHOINDIRECTGOT | |
| SFILEPATH | |
| SCONST | |
| SDYNIMPORT | |
| SHOSTOBJ | |
| // Sections for debugging information | |
| SDWARFSECT | |
| SDWARFINFO | |
| SDWARFRANGE | |
| SDWARFLOC | |
| SDWARFMISC // Not really a section; informs/affects other DWARF section generation | |
| ) | |
| // AbiSymKindToSymKind maps values read from object files (which are | |
| // of type cmd/internal/objabi.SymKind) to values of type SymKind. | |
| var AbiSymKindToSymKind = [...]SymKind{ | |
| Sxxx, | |
| STEXT, | |
| SRODATA, | |
| SNOPTRDATA, | |
| SDATA, | |
| SBSS, | |
| SNOPTRBSS, | |
| STLSBSS, | |
| SDWARFINFO, | |
| SDWARFRANGE, | |
| SDWARFLOC, | |
| SDWARFMISC, | |
| } | |
| // ReadOnly are the symbol kinds that form read-only sections. In some | |
| // cases, if they will require relocations, they are transformed into | |
| // rel-ro sections using relROMap. | |
| var ReadOnly = []SymKind{ | |
| STYPE, | |
| SSTRING, | |
| SGOSTRING, | |
| SGOFUNC, | |
| SGCBITS, | |
| SRODATA, | |
| SFUNCTAB, | |
| } | |
| // RelROMap describes the transformation of read-only symbols to rel-ro | |
| // symbols. | |
| var RelROMap = map[SymKind]SymKind{ | |
| STYPE: STYPERELRO, | |
| SSTRING: SSTRINGRELRO, | |
| SGOSTRING: SGOSTRINGRELRO, | |
| SGOFUNC: SGOFUNCRELRO, | |
| SGCBITS: SGCBITSRELRO, | |
| SRODATA: SRODATARELRO, | |
| SFUNCTAB: SFUNCTABRELRO, | |
| } |