1 // Inferno utils/5l/asm.c 2 // https://bitbucket.org/inferno-os/inferno-os/src/default/utils/5l/asm.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 mips64 32 33 import ( 34 "cmd/internal/objabi" 35 "cmd/internal/sys" 36 "cmd/link/internal/ld" 37 "cmd/link/internal/sym" 38 "debug/elf" 39 "fmt" 40 "log" 41 ) 42 43 func gentext(ctxt *ld.Link) {} 44 45 func adddynrel(ctxt *ld.Link, s *sym.Symbol, r *sym.Reloc) bool { 46 log.Fatalf("adddynrel not implemented") 47 return false 48 } 49 50 func elfreloc1(ctxt *ld.Link, r *sym.Reloc, sectoff int64) bool { 51 // mips64 ELF relocation (endian neutral) 52 // offset uint64 53 // sym uint32 54 // ssym uint8 55 // type3 uint8 56 // type2 uint8 57 // type uint8 58 // addend int64 59 60 ctxt.Out.Write64(uint64(sectoff)) 61 62 elfsym := r.Xsym.ElfsymForReloc() 63 ctxt.Out.Write32(uint32(elfsym)) 64 ctxt.Out.Write8(0) 65 ctxt.Out.Write8(0) 66 ctxt.Out.Write8(0) 67 switch r.Type { 68 default: 69 return false 70 case objabi.R_ADDR: 71 switch r.Siz { 72 case 4: 73 ctxt.Out.Write8(uint8(elf.R_MIPS_32)) 74 case 8: 75 ctxt.Out.Write8(uint8(elf.R_MIPS_64)) 76 default: 77 return false 78 } 79 case objabi.R_ADDRMIPS: 80 ctxt.Out.Write8(uint8(elf.R_MIPS_LO16)) 81 case objabi.R_ADDRMIPSU: 82 ctxt.Out.Write8(uint8(elf.R_MIPS_HI16)) 83 case objabi.R_ADDRMIPSTLS: 84 ctxt.Out.Write8(uint8(elf.R_MIPS_TLS_TPREL_LO16)) 85 case objabi.R_CALLMIPS, 86 objabi.R_JMPMIPS: 87 ctxt.Out.Write8(uint8(elf.R_MIPS_26)) 88 } 89 ctxt.Out.Write64(uint64(r.Xadd)) 90 91 return true 92 } 93 94 func elfsetupplt(ctxt *ld.Link) { 95 return 96 } 97 98 func machoreloc1(arch *sys.Arch, out *ld.OutBuf, s *sym.Symbol, r *sym.Reloc, sectoff int64) bool { 99 return false 100 } 101 102 func archreloc(ctxt *ld.Link, r *sym.Reloc, s *sym.Symbol, val *int64) bool { 103 if ctxt.LinkMode == ld.LinkExternal { 104 switch r.Type { 105 default: 106 return false 107 case objabi.R_ADDRMIPS, 108 objabi.R_ADDRMIPSU: 109 r.Done = false 110 111 // set up addend for eventual relocation via outer symbol. 112 rs := r.Sym 113 r.Xadd = r.Add 114 for rs.Outer != nil { 115 r.Xadd += ld.Symaddr(rs) - ld.Symaddr(rs.Outer) 116 rs = rs.Outer 117 } 118 119 if rs.Type != sym.SHOSTOBJ && rs.Type != sym.SDYNIMPORT && rs.Sect == nil { 120 ld.Errorf(s, "missing section for %s", rs.Name) 121 } 122 r.Xsym = rs 123 124 return true 125 case objabi.R_ADDRMIPSTLS, 126 objabi.R_CALLMIPS, 127 objabi.R_JMPMIPS: 128 r.Done = false 129 r.Xsym = r.Sym 130 r.Xadd = r.Add 131 return true 132 } 133 } 134 135 switch r.Type { 136 case objabi.R_CONST: 137 *val = r.Add 138 return true 139 case objabi.R_GOTOFF: 140 *val = ld.Symaddr(r.Sym) + r.Add - ld.Symaddr(ctxt.Syms.Lookup(".got", 0)) 141 return true 142 case objabi.R_ADDRMIPS, 143 objabi.R_ADDRMIPSU: 144 t := ld.Symaddr(r.Sym) + r.Add 145 o1 := ctxt.Arch.ByteOrder.Uint32(s.P[r.Off:]) 146 if r.Type == objabi.R_ADDRMIPS { 147 *val = int64(o1&0xffff0000 | uint32(t)&0xffff) 148 } else { 149 *val = int64(o1&0xffff0000 | uint32((t+1<<15)>>16)&0xffff) 150 } 151 return true 152 case objabi.R_ADDRMIPSTLS: 153 // thread pointer is at 0x7000 offset from the start of TLS data area 154 t := ld.Symaddr(r.Sym) + r.Add - 0x7000 155 if t < -32768 || t >= 32678 { 156 ld.Errorf(s, "TLS offset out of range %d", t) 157 } 158 o1 := ctxt.Arch.ByteOrder.Uint32(s.P[r.Off:]) 159 *val = int64(o1&0xffff0000 | uint32(t)&0xffff) 160 return true 161 case objabi.R_CALLMIPS, 162 objabi.R_JMPMIPS: 163 // Low 26 bits = (S + A) >> 2 164 t := ld.Symaddr(r.Sym) + r.Add 165 o1 := ctxt.Arch.ByteOrder.Uint32(s.P[r.Off:]) 166 *val = int64(o1&0xfc000000 | uint32(t>>2)&^0xfc000000) 167 return true 168 } 169 170 return false 171 } 172 173 func archrelocvariant(ctxt *ld.Link, r *sym.Reloc, s *sym.Symbol, t int64) int64 { 174 return -1 175 } 176 177 func asmb(ctxt *ld.Link) { 178 if ctxt.Debugvlog != 0 { 179 ctxt.Logf("%5.2f asmb\n", ld.Cputime()) 180 } 181 182 if ctxt.IsELF { 183 ld.Asmbelfsetup() 184 } 185 186 sect := ld.Segtext.Sections[0] 187 ctxt.Out.SeekSet(int64(sect.Vaddr - ld.Segtext.Vaddr + ld.Segtext.Fileoff)) 188 ld.Codeblk(ctxt, int64(sect.Vaddr), int64(sect.Length)) 189 for _, sect = range ld.Segtext.Sections[1:] { 190 ctxt.Out.SeekSet(int64(sect.Vaddr - ld.Segtext.Vaddr + ld.Segtext.Fileoff)) 191 ld.Datblk(ctxt, int64(sect.Vaddr), int64(sect.Length)) 192 } 193 194 if ld.Segrodata.Filelen > 0 { 195 if ctxt.Debugvlog != 0 { 196 ctxt.Logf("%5.2f rodatblk\n", ld.Cputime()) 197 } 198 ctxt.Out.SeekSet(int64(ld.Segrodata.Fileoff)) 199 ld.Datblk(ctxt, int64(ld.Segrodata.Vaddr), int64(ld.Segrodata.Filelen)) 200 } 201 if ld.Segrelrodata.Filelen > 0 { 202 if ctxt.Debugvlog != 0 { 203 ctxt.Logf("%5.2f rodatblk\n", ld.Cputime()) 204 } 205 ctxt.Out.SeekSet(int64(ld.Segrelrodata.Fileoff)) 206 ld.Datblk(ctxt, int64(ld.Segrelrodata.Vaddr), int64(ld.Segrelrodata.Filelen)) 207 } 208 209 if ctxt.Debugvlog != 0 { 210 ctxt.Logf("%5.2f datblk\n", ld.Cputime()) 211 } 212 213 ctxt.Out.SeekSet(int64(ld.Segdata.Fileoff)) 214 ld.Datblk(ctxt, int64(ld.Segdata.Vaddr), int64(ld.Segdata.Filelen)) 215 216 ctxt.Out.SeekSet(int64(ld.Segdwarf.Fileoff)) 217 ld.Dwarfblk(ctxt, int64(ld.Segdwarf.Vaddr), int64(ld.Segdwarf.Filelen)) 218 219 /* output symbol table */ 220 ld.Symsize = 0 221 222 ld.Lcsize = 0 223 symo := uint32(0) 224 if !*ld.FlagS { 225 // TODO: rationalize 226 if ctxt.Debugvlog != 0 { 227 ctxt.Logf("%5.2f sym\n", ld.Cputime()) 228 } 229 switch ctxt.HeadType { 230 default: 231 if ctxt.IsELF { 232 symo = uint32(ld.Segdwarf.Fileoff + ld.Segdwarf.Filelen) 233 symo = uint32(ld.Rnd(int64(symo), int64(*ld.FlagRound))) 234 } 235 236 case objabi.Hplan9: 237 symo = uint32(ld.Segdata.Fileoff + ld.Segdata.Filelen) 238 } 239 240 ctxt.Out.SeekSet(int64(symo)) 241 switch ctxt.HeadType { 242 default: 243 if ctxt.IsELF { 244 if ctxt.Debugvlog != 0 { 245 ctxt.Logf("%5.2f elfsym\n", ld.Cputime()) 246 } 247 ld.Asmelfsym(ctxt) 248 ctxt.Out.Flush() 249 ctxt.Out.Write(ld.Elfstrdat) 250 251 if ctxt.LinkMode == ld.LinkExternal { 252 ld.Elfemitreloc(ctxt) 253 } 254 } 255 256 case objabi.Hplan9: 257 ld.Asmplan9sym(ctxt) 258 ctxt.Out.Flush() 259 260 sym := ctxt.Syms.Lookup("pclntab", 0) 261 if sym != nil { 262 ld.Lcsize = int32(len(sym.P)) 263 ctxt.Out.Write(sym.P) 264 ctxt.Out.Flush() 265 } 266 } 267 } 268 269 if ctxt.Debugvlog != 0 { 270 ctxt.Logf("%5.2f header\n", ld.Cputime()) 271 } 272 ctxt.Out.SeekSet(0) 273 switch ctxt.HeadType { 274 default: 275 case objabi.Hplan9: /* plan 9 */ 276 magic := uint32(4*18*18 + 7) 277 if ctxt.Arch == sys.ArchMIPS64LE { 278 magic = uint32(4*26*26 + 7) 279 } 280 ctxt.Out.Write32(magic) /* magic */ 281 ctxt.Out.Write32(uint32(ld.Segtext.Filelen)) /* sizes */ 282 ctxt.Out.Write32(uint32(ld.Segdata.Filelen)) 283 ctxt.Out.Write32(uint32(ld.Segdata.Length - ld.Segdata.Filelen)) 284 ctxt.Out.Write32(uint32(ld.Symsize)) /* nsyms */ 285 ctxt.Out.Write32(uint32(ld.Entryvalue(ctxt))) /* va of entry */ 286 ctxt.Out.Write32(0) 287 ctxt.Out.Write32(uint32(ld.Lcsize)) 288 289 case objabi.Hlinux, 290 objabi.Hfreebsd, 291 objabi.Hnetbsd, 292 objabi.Hopenbsd, 293 objabi.Hnacl: 294 ld.Asmbelf(ctxt, int64(symo)) 295 } 296 297 ctxt.Out.Flush() 298 if *ld.FlagC { 299 fmt.Printf("textsize=%d\n", ld.Segtext.Filelen) 300 fmt.Printf("datsize=%d\n", ld.Segdata.Filelen) 301 fmt.Printf("bsssize=%d\n", ld.Segdata.Length-ld.Segdata.Filelen) 302 fmt.Printf("symsize=%d\n", ld.Symsize) 303 fmt.Printf("lcsize=%d\n", ld.Lcsize) 304 fmt.Printf("total=%d\n", ld.Segtext.Filelen+ld.Segdata.Length+uint64(ld.Symsize)+uint64(ld.Lcsize)) 305 } 306 } 307
