github.com/razvanm/vanadium-go-1.3@v0.0.0-20160721203343-4a65068e5915/src/cmd/6g/gobj.c (about) 1 // Derived from Inferno utils/6c/swt.c 2 // http://code.google.com/p/inferno-os/source/browse/utils/6c/swt.c 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 "gg.h" 34 35 int 36 dsname(Sym *s, int off, char *t, int n) 37 { 38 Prog *p; 39 40 p = gins(ADATA, N, N); 41 p->from.type = D_EXTERN; 42 p->from.index = D_NONE; 43 p->from.offset = off; 44 p->from.scale = n; 45 p->from.sym = linksym(s); 46 47 p->to.type = D_SCONST; 48 p->to.index = D_NONE; 49 memmove(p->to.u.sval, t, n); 50 return off + n; 51 } 52 53 /* 54 * make a refer to the data s, s+len 55 * emitting DATA if needed. 56 */ 57 void 58 datastring(char *s, int len, Addr *a) 59 { 60 Sym *sym; 61 62 sym = stringsym(s, len); 63 a->type = D_EXTERN; 64 a->sym = linksym(sym); 65 a->node = sym->def; 66 a->offset = widthptr+widthint; // skip header 67 a->etype = simtype[TINT]; 68 } 69 70 /* 71 * make a refer to the string sval, 72 * emitting DATA if needed. 73 */ 74 void 75 datagostring(Strlit *sval, Addr *a) 76 { 77 Sym *sym; 78 79 sym = stringsym(sval->s, sval->len); 80 a->type = D_EXTERN; 81 a->sym = linksym(sym); 82 a->node = sym->def; 83 a->offset = 0; // header 84 a->etype = TINT32; 85 } 86 87 void 88 gdata(Node *nam, Node *nr, int wid) 89 { 90 Prog *p; 91 92 if(nr->op == OLITERAL) { 93 switch(nr->val.ctype) { 94 case CTCPLX: 95 gdatacomplex(nam, nr->val.u.cval); 96 return; 97 case CTSTR: 98 gdatastring(nam, nr->val.u.sval); 99 return; 100 } 101 } 102 p = gins(ADATA, nam, nr); 103 p->from.scale = wid; 104 } 105 106 void 107 gdatacomplex(Node *nam, Mpcplx *cval) 108 { 109 Prog *p; 110 int w; 111 112 w = cplxsubtype(nam->type->etype); 113 w = types[w]->width; 114 115 p = gins(ADATA, nam, N); 116 p->from.scale = w; 117 p->to.type = D_FCONST; 118 p->to.u.dval = mpgetflt(&cval->real); 119 120 p = gins(ADATA, nam, N); 121 p->from.scale = w; 122 p->from.offset += w; 123 p->to.type = D_FCONST; 124 p->to.u.dval = mpgetflt(&cval->imag); 125 } 126 127 void 128 gdatastring(Node *nam, Strlit *sval) 129 { 130 Prog *p; 131 Node nod1; 132 133 p = gins(ADATA, nam, N); 134 datastring(sval->s, sval->len, &p->to); 135 p->from.scale = types[tptr]->width; 136 p->to.index = p->to.type; 137 p->to.type = D_ADDR; 138 //print("%P\n", p); 139 140 nodconst(&nod1, types[TINT], sval->len); 141 p = gins(ADATA, nam, &nod1); 142 p->from.scale = widthint; 143 p->from.offset += widthptr; 144 } 145 146 int 147 dstringptr(Sym *s, int off, char *str) 148 { 149 Prog *p; 150 151 off = rnd(off, widthptr); 152 p = gins(ADATA, N, N); 153 p->from.type = D_EXTERN; 154 p->from.index = D_NONE; 155 p->from.sym = linksym(s); 156 p->from.offset = off; 157 p->from.scale = widthptr; 158 159 datastring(str, strlen(str)+1, &p->to); 160 p->to.index = p->to.type; 161 p->to.type = D_ADDR; 162 p->to.etype = simtype[TINT]; 163 off += widthptr; 164 165 return off; 166 } 167 168 int 169 dgostrlitptr(Sym *s, int off, Strlit *lit) 170 { 171 Prog *p; 172 173 if(lit == nil) 174 return duintptr(s, off, 0); 175 176 off = rnd(off, widthptr); 177 p = gins(ADATA, N, N); 178 p->from.type = D_EXTERN; 179 p->from.index = D_NONE; 180 p->from.sym = linksym(s); 181 p->from.offset = off; 182 p->from.scale = widthptr; 183 datagostring(lit, &p->to); 184 p->to.index = p->to.type; 185 p->to.type = D_ADDR; 186 p->to.etype = simtype[TINT]; 187 off += widthptr; 188 189 return off; 190 } 191 192 int 193 dgostringptr(Sym *s, int off, char *str) 194 { 195 int n; 196 Strlit *lit; 197 198 if(str == nil) 199 return duintptr(s, off, 0); 200 201 n = strlen(str); 202 lit = mal(sizeof *lit + n); 203 strcpy(lit->s, str); 204 lit->len = n; 205 return dgostrlitptr(s, off, lit); 206 } 207 208 int 209 dsymptr(Sym *s, int off, Sym *x, int xoff) 210 { 211 Prog *p; 212 213 off = rnd(off, widthptr); 214 215 p = gins(ADATA, N, N); 216 p->from.type = D_EXTERN; 217 p->from.index = D_NONE; 218 p->from.sym = linksym(s); 219 p->from.offset = off; 220 p->from.scale = widthptr; 221 p->to.type = D_ADDR; 222 p->to.index = D_EXTERN; 223 p->to.sym = linksym(x); 224 p->to.offset = xoff; 225 off += widthptr; 226 227 return off; 228 } 229 230 void 231 nopout(Prog *p) 232 { 233 p->as = ANOP; 234 } 235