| // Inferno utils/6l/obj.c |
| // http://code.google.com/p/inferno-os/source/browse/utils/6l/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. |
| |
| // Reading object files. |
| |
| #define EXTERN |
| #include "l.h" |
| #include "../ld/lib.h" |
| #include "../ld/elf.h" |
| #include "../ld/macho.h" |
| #include "../ld/dwarf.h" |
| #include "../ld/pe.h" |
| #include <ar.h> |
| |
| char *noname = "<none>"; |
| char* paramspace = "FP"; |
| |
| void |
| main(int argc, char *argv[]) |
| { |
| int i; |
| |
| linkarchinit(); |
| ctxt = linknew(thelinkarch); |
| ctxt->thechar = thechar; |
| ctxt->thestring = thestring; |
| ctxt->diag = diag; |
| ctxt->bso = &bso; |
| |
| Binit(&bso, 1, OWRITE); |
| listinit(); |
| memset(debug, 0, sizeof(debug)); |
| nerrors = 0; |
| outfile = nil; |
| HEADTYPE = -1; |
| INITTEXT = -1; |
| INITDAT = -1; |
| INITRND = -1; |
| INITENTRY = 0; |
| linkmode = LinkAuto; |
| |
| // For testing behavior of go command when tools crash. |
| // Undocumented, not in standard flag parser to avoid |
| // exposing in usage message. |
| for(i=1; i<argc; i++) |
| if(strcmp(argv[i], "-crash_for_testing") == 0) |
| *(volatile int*)0 = 0; |
| |
| if(thechar == '5' && ctxt->goarm == 5) |
| debug['F'] = 1; |
| |
| flagcount("1", "use alternate profiling code", &debug['1']); |
| if(thechar == '6') |
| flagcount("8", "assume 64-bit addresses", &debug['8']); |
| flagfn1("B", "info: define ELF NT_GNU_BUILD_ID note", addbuildinfo); |
| flagcount("C", "check Go calls to C code", &debug['C']); |
| flagint64("D", "addr: data address", &INITDAT); |
| flagstr("E", "sym: entry symbol", &INITENTRY); |
| if(thechar == '5') |
| flagcount("G", "debug pseudo-ops", &debug['G']); |
| flagfn1("I", "interp: set ELF interp", setinterp); |
| flagfn1("L", "dir: add dir to library path", Lflag); |
| flagfn1("H", "head: header type", setheadtype); |
| flagcount("K", "add stack underflow checks", &debug['K']); |
| if(thechar == '5') |
| flagcount("M", "disable software div/mod", &debug['M']); |
| flagcount("O", "print pc-line tables", &debug['O']); |
| flagcount("Q", "debug byte-register code gen", &debug['Q']); |
| if(thechar == '5') |
| flagcount("P", "debug code generation", &debug['P']); |
| flagint32("R", "rnd: address rounding", &INITRND); |
| flagcount("S", "check type signatures", &debug['S']); |
| flagint64("T", "addr: text address", &INITTEXT); |
| flagfn0("V", "print version and exit", doversion); |
| flagcount("W", "disassemble input", &debug['W']); |
| flagfn2("X", "name value: define string data", addstrdata); |
| flagcount("Z", "clear stack frame on entry", &debug['Z']); |
| flagcount("a", "disassemble output", &debug['a']); |
| flagcount("c", "dump call graph", &debug['c']); |
| flagcount("d", "disable dynamic executable", &debug['d']); |
| flagstr("extld", "ld: linker to run in external mode", &extld); |
| flagstr("extldflags", "ldflags: flags for external linker", &extldflags); |
| flagcount("f", "ignore version mismatch", &debug['f']); |
| flagcount("g", "disable go package data checks", &debug['g']); |
| flagstr("installsuffix", "suffix: pkg directory suffix", &flag_installsuffix); |
| flagstr("k", "sym: set field tracking symbol", &tracksym); |
| flagfn1("linkmode", "mode: set link mode (internal, external, auto)", setlinkmode); |
| flagcount("n", "dump symbol table", &debug['n']); |
| flagstr("o", "outfile: set output file", &outfile); |
| flagstr("r", "dir1:dir2:...: set ELF dynamic linker search path", &rpath); |
| flagcount("race", "enable race detector", &flag_race); |
| flagcount("s", "disable symbol table", &debug['s']); |
| if(thechar == '5' || thechar == '6') |
| flagcount("shared", "generate shared object (implies -linkmode external)", &flag_shared); |
| flagstr("tmpdir", "dir: leave temporary files in this directory", &tmpdir); |
| flagcount("u", "reject unsafe packages", &debug['u']); |
| flagcount("v", "print link trace", &debug['v']); |
| flagcount("w", "disable DWARF generation", &debug['w']); |
| |
| flagparse(&argc, &argv, usage); |
| ctxt->bso = &bso; |
| ctxt->debugdivmod = debug['M']; |
| ctxt->debugfloat = debug['F']; |
| ctxt->debughist = debug['O']; |
| ctxt->debugpcln = debug['O']; |
| ctxt->debugread = debug['W']; |
| ctxt->debugstack = debug['K']; |
| ctxt->debugvlog = debug['v']; |
| |
| if(argc != 1) |
| usage(); |
| |
| if(outfile == nil) { |
| if(HEADTYPE == Hwindows) |
| outfile = smprint("%c.out.exe", thechar); |
| else |
| outfile = smprint("%c.out", thechar); |
| } |
| libinit(); // creates outfile |
| |
| if(HEADTYPE == -1) |
| HEADTYPE = headtype(goos); |
| ctxt->headtype = HEADTYPE; |
| if(headstring == nil) |
| headstring = headstr(HEADTYPE); |
| |
| archinit(); |
| ctxt->debugfloat = debug['F']; |
| |
| if(debug['v']) |
| Bprint(&bso, "HEADER = -H%d -T0x%llux -D0x%llux -R0x%ux\n", |
| HEADTYPE, INITTEXT, INITDAT, INITRND); |
| Bflush(&bso); |
| |
| cbp = buf.cbuf; |
| cbc = sizeof(buf.cbuf); |
| |
| addlibpath(ctxt, "command line", "command line", argv[0], "main"); |
| loadlib(); |
| |
| if(thechar == '5') { |
| // mark some functions that are only referenced after linker code editing |
| if(debug['F']) |
| mark(linkrlookup(ctxt, "_sfloat", 0)); |
| mark(linklookup(ctxt, "runtime.read_tls_fallback", 0)); |
| } |
| |
| checkgo(); |
| deadcode(); |
| callgraph(); |
| paramspace = "SP"; /* (FP) now (SP) on output */ |
| |
| doelf(); |
| if(HEADTYPE == Hdarwin) |
| domacho(); |
| dostkcheck(); |
| if(HEADTYPE == Hwindows) |
| dope(); |
| addexport(); |
| textaddress(); |
| pclntab(); |
| symtab(); |
| dodata(); |
| address(); |
| doweak(); |
| reloc(); |
| asmb(); |
| undef(); |
| hostlink(); |
| if(debug['v']) { |
| Bprint(&bso, "%5.2f cpu time\n", cputime()); |
| Bprint(&bso, "%d symbols\n", ctxt->nsymbol); |
| Bprint(&bso, "%d sizeof adr\n", sizeof(Addr)); |
| Bprint(&bso, "%d sizeof prog\n", sizeof(Prog)); |
| Bprint(&bso, "%lld liveness data\n", liveness); |
| } |
| Bflush(&bso); |
| |
| errorexit(); |
| } |