Colin Cross | 7bb052a | 2015-02-03 12:59:37 -0800 | [diff] [blame^] | 1 | // Inferno utils/6l/l.h |
| 2 | // http://code.google.com/p/inferno-os/source/browse/utils/6l/l.h |
| 3 | // |
| 4 | // Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved. |
| 5 | // Portions Copyright © 1995-1997 C H Forsyth (forsyth@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@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 | #include <u.h> |
| 32 | #include <libc.h> |
| 33 | #include <bio.h> |
| 34 | #include <link.h> |
| 35 | #include "6.out.h" |
| 36 | |
| 37 | #ifndef EXTERN |
| 38 | #define EXTERN extern |
| 39 | #endif |
| 40 | |
| 41 | enum |
| 42 | { |
| 43 | thechar = '6', |
| 44 | MaxAlign = 32, // max data alignment |
| 45 | |
| 46 | // Loop alignment constants: |
| 47 | // want to align loop entry to LoopAlign-byte boundary, |
| 48 | // and willing to insert at most MaxLoopPad bytes of NOP to do so. |
| 49 | // We define a loop entry as the target of a backward jump. |
| 50 | // |
| 51 | // gcc uses MaxLoopPad = 10 for its 'generic x86-64' config, |
| 52 | // and it aligns all jump targets, not just backward jump targets. |
| 53 | // |
| 54 | // As of 6/1/2012, the effect of setting MaxLoopPad = 10 here |
| 55 | // is very slight but negative, so the alignment is disabled by |
| 56 | // setting MaxLoopPad = 0. The code is here for reference and |
| 57 | // for future experiments. |
| 58 | // |
| 59 | LoopAlign = 16, |
| 60 | MaxLoopPad = 0, |
| 61 | |
| 62 | FuncAlign = 16 |
| 63 | }; |
| 64 | |
| 65 | EXTERN int PtrSize; |
| 66 | EXTERN int IntSize; |
| 67 | EXTERN int RegSize; |
| 68 | |
| 69 | #define P ((Prog*)0) |
| 70 | #define S ((LSym*)0) |
| 71 | enum |
| 72 | { |
| 73 | MINLC = 1, |
| 74 | }; |
| 75 | |
| 76 | #pragma varargck type "I" uchar* |
| 77 | |
| 78 | EXTERN LSym* datap; |
| 79 | EXTERN int debug[128]; |
| 80 | EXTERN char literal[32]; |
| 81 | EXTERN int32 lcsize; |
| 82 | EXTERN char* rpath; |
| 83 | EXTERN int32 spsize; |
| 84 | EXTERN LSym* symlist; |
| 85 | EXTERN int32 symsize; |
| 86 | |
| 87 | int Iconv(Fmt *fp); |
| 88 | void adddynlib(char *lib); |
| 89 | void adddynrel(LSym *s, Reloc *r); |
| 90 | void adddynrela(LSym *rela, LSym *s, Reloc *r); |
| 91 | void adddynsym(Link *ctxt, LSym *s); |
| 92 | int archreloc(Reloc *r, LSym *s, vlong *val); |
| 93 | void asmb(void); |
| 94 | int elfreloc1(Reloc *r, vlong sectoff); |
| 95 | void elfsetupplt(void); |
| 96 | void listinit(void); |
| 97 | int machoreloc1(Reloc *r, vlong sectoff); |
| 98 | vlong rnd(vlong v, vlong r); |
| 99 | |
| 100 | /* Native is little-endian */ |
| 101 | #define LPUT(a) lputl(a) |
| 102 | #define WPUT(a) wputl(a) |
| 103 | #define VPUT(a) vputl(a) |
| 104 | |
| 105 | /* Used by ../ld/dwarf.c */ |
| 106 | enum |
| 107 | { |
| 108 | DWARFREGSP = 7 |
| 109 | }; |