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+// Inferno utils/8l/obj.c
+// https://bitbucket.org/inferno-os/inferno-os/src/master/utils/8l/obj.c
+//
+// 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 x86
+
+import (
+ "cmd/internal/objabi"
+ "cmd/internal/sys"
+ "cmd/link/internal/ld"
+)
+
+func Init() (*sys.Arch, ld.Arch) {
+ arch := sys.Arch386
+
+ theArch := ld.Arch{
+ Funcalign: funcAlign,
+ Maxalign: maxAlign,
+ Minalign: minAlign,
+ Dwarfregsp: dwarfRegSP,
+ Dwarfreglr: dwarfRegLR,
+ // 0xCC is INT $3 - breakpoint instruction
+ CodePad: []byte{0xCC},
+
+ Plan9Magic: uint32(4*11*11 + 7),
+
+ Adddynrel: adddynrel,
+ Archinit: archinit,
+ Archreloc: archreloc,
+ Archrelocvariant: archrelocvariant,
+ Elfreloc1: elfreloc1,
+ ElfrelocSize: 8,
+ Elfsetupplt: elfsetupplt,
+ Gentext: gentext,
+ Machoreloc1: machoreloc1,
+ PEreloc1: pereloc1,
+
+ Linuxdynld: "/lib/ld-linux.so.2",
+ Freebsddynld: "/usr/libexec/ld-elf.so.1",
+ Openbsddynld: "/usr/libexec/ld.so",
+ Netbsddynld: "/usr/libexec/ld.elf_so",
+ Solarisdynld: "/lib/ld.so.1",
+ }
+
+ return arch, theArch
+}
+
+func archinit(ctxt *ld.Link) {
+ switch ctxt.HeadType {
+ default:
+ ld.Exitf("unknown -H option: %v", ctxt.HeadType)
+
+ case objabi.Hplan9: /* plan 9 */
+ ld.HEADR = 32
+
+ if *ld.FlagTextAddr == -1 {
+ *ld.FlagTextAddr = 4096 + int64(ld.HEADR)
+ }
+ if *ld.FlagRound == -1 {
+ *ld.FlagRound = 4096
+ }
+
+ case objabi.Hdarwin: /* apple MACH */
+ ld.HEADR = ld.INITIAL_MACHO_HEADR
+ if *ld.FlagTextAddr == -1 {
+ *ld.FlagTextAddr = 4096 + int64(ld.HEADR)
+ }
+ if *ld.FlagRound == -1 {
+ *ld.FlagRound = 4096
+ }
+
+ case objabi.Hlinux, /* elf32 executable */
+ objabi.Hfreebsd,
+ objabi.Hnetbsd,
+ objabi.Hopenbsd:
+ ld.Elfinit(ctxt)
+
+ ld.HEADR = ld.ELFRESERVE
+ if *ld.FlagTextAddr == -1 {
+ *ld.FlagTextAddr = 0x08048000 + int64(ld.HEADR)
+ }
+ if *ld.FlagRound == -1 {
+ *ld.FlagRound = 4096
+ }
+
+ case objabi.Hwindows: /* PE executable */
+ // ld.HEADR, ld.FlagTextAddr, ld.FlagRound are set in ld.Peinit
+ return
+ }
+}