13e12c5d1SDavid du Colombier /* 2bd389b36SDavid du Colombier * vobj.c - identify and parse a mips object file 33e12c5d1SDavid du Colombier */ 43e12c5d1SDavid du Colombier #include <u.h> 53e12c5d1SDavid du Colombier #include <libc.h> 63e12c5d1SDavid du Colombier #include <bio.h> 73e12c5d1SDavid du Colombier #include "vc/v.out.h" 83e12c5d1SDavid du Colombier #include "obj.h" 93e12c5d1SDavid du Colombier 103e12c5d1SDavid du Colombier typedef struct Addr Addr; 113e12c5d1SDavid du Colombier struct Addr 123e12c5d1SDavid du Colombier { 133e12c5d1SDavid du Colombier char type; 143e12c5d1SDavid du Colombier char sym; 153e12c5d1SDavid du Colombier char name; 163e12c5d1SDavid du Colombier }; 17bd389b36SDavid du Colombier static Addr addr(Biobuf*); 183e12c5d1SDavid du Colombier static char type2char(int); 19bd389b36SDavid du Colombier static void skip(Biobuf*, int); 203e12c5d1SDavid du Colombier 213e12c5d1SDavid du Colombier int 223e12c5d1SDavid du Colombier _isv(char *s) 233e12c5d1SDavid du Colombier { 243e12c5d1SDavid du Colombier return s[0] == ANAME /* ANAME */ 253e12c5d1SDavid du Colombier && s[1] == D_FILE /* type */ 263e12c5d1SDavid du Colombier && s[2] == 1 /* sym */ 273e12c5d1SDavid du Colombier && s[3] == '<'; /* name of file */ 283e12c5d1SDavid du Colombier } 293e12c5d1SDavid du Colombier 30bd389b36SDavid du Colombier int 31bd389b36SDavid du Colombier _readv(Biobuf *bp, Prog *p) 323e12c5d1SDavid du Colombier { 33*219b2ee8SDavid du Colombier int as, n; 343e12c5d1SDavid du Colombier Addr a; 353e12c5d1SDavid du Colombier 36bd389b36SDavid du Colombier as = Bgetc(bp); /* as */ 373e12c5d1SDavid du Colombier if(as < 0) 383e12c5d1SDavid du Colombier return 0; 393e12c5d1SDavid du Colombier p->kind = aNone; 403e12c5d1SDavid du Colombier if(as == ANAME){ 413e12c5d1SDavid du Colombier p->kind = aName; 42bd389b36SDavid du Colombier p->type = type2char(Bgetc(bp)); /* type */ 43bd389b36SDavid du Colombier p->sym = Bgetc(bp); /* sym */ 44*219b2ee8SDavid du Colombier n = 0; 45*219b2ee8SDavid du Colombier for(;;) { 46*219b2ee8SDavid du Colombier as = Bgetc(bp); 47*219b2ee8SDavid du Colombier if(as < 0) 48*219b2ee8SDavid du Colombier return 0; 49*219b2ee8SDavid du Colombier n++; 50*219b2ee8SDavid du Colombier if(as == 0) 51*219b2ee8SDavid du Colombier break; 523e12c5d1SDavid du Colombier } 53*219b2ee8SDavid du Colombier p->id = malloc(n); 54*219b2ee8SDavid du Colombier if(p->id == 0) 55*219b2ee8SDavid du Colombier return 0; 56*219b2ee8SDavid du Colombier Bseek(bp, -n, 1); 57*219b2ee8SDavid du Colombier if(Bread(bp, p->id, n) != n) 58*219b2ee8SDavid du Colombier return 0; 59bd389b36SDavid du Colombier return 1; 603e12c5d1SDavid du Colombier } 613e12c5d1SDavid du Colombier if(as == ATEXT) 623e12c5d1SDavid du Colombier p->kind = aText; 633e12c5d1SDavid du Colombier else if(as == AGLOBL) 643e12c5d1SDavid du Colombier p->kind = aData; 65bd389b36SDavid du Colombier skip(bp, 5); /* reg(1), lineno(4) */ 66bd389b36SDavid du Colombier a = addr(bp); 67bd389b36SDavid du Colombier addr(bp); 68bd389b36SDavid du Colombier if(a.type != D_OREG || a.name != D_STATIC && a.name != D_EXTERN) 693e12c5d1SDavid du Colombier p->kind = aNone; 703e12c5d1SDavid du Colombier p->sym = a.sym; 71bd389b36SDavid du Colombier return 1; 723e12c5d1SDavid du Colombier } 733e12c5d1SDavid du Colombier 743e12c5d1SDavid du Colombier static Addr 75bd389b36SDavid du Colombier addr(Biobuf *bp) 763e12c5d1SDavid du Colombier { 773e12c5d1SDavid du Colombier Addr a; 78bd389b36SDavid du Colombier long off; 793e12c5d1SDavid du Colombier 80bd389b36SDavid du Colombier a.type = Bgetc(bp); /* a.type */ 81bd389b36SDavid du Colombier skip(bp,1); /* reg */ 82bd389b36SDavid du Colombier a.sym = Bgetc(bp); /* sym index */ 83bd389b36SDavid du Colombier a.name = Bgetc(bp); /* sym type */ 843e12c5d1SDavid du Colombier switch(a.type){ 853e12c5d1SDavid du Colombier default: 863e12c5d1SDavid du Colombier case D_NONE: case D_REG: case D_FREG: case D_MREG: 873e12c5d1SDavid du Colombier case D_FCREG: case D_LO: case D_HI: 883e12c5d1SDavid du Colombier break; 893e12c5d1SDavid du Colombier case D_OREG: 903e12c5d1SDavid du Colombier case D_CONST: 913e12c5d1SDavid du Colombier case D_BRANCH: 92bd389b36SDavid du Colombier off = Bgetc(bp); 93bd389b36SDavid du Colombier off |= Bgetc(bp) << 8; 94bd389b36SDavid du Colombier off |= Bgetc(bp) << 16; 95bd389b36SDavid du Colombier off |= Bgetc(bp) << 24; 96bd389b36SDavid du Colombier if(off < 0) 97bd389b36SDavid du Colombier off = -off; 98bd389b36SDavid du Colombier if(a.sym && (a.name==D_PARAM || a.name==D_AUTO)) 99bd389b36SDavid du Colombier _offset(a.sym, off); 1003e12c5d1SDavid du Colombier break; 1013e12c5d1SDavid du Colombier case D_SCONST: 102bd389b36SDavid du Colombier skip(bp, NSNAME); 1033e12c5d1SDavid du Colombier break; 1043e12c5d1SDavid du Colombier case D_FCONST: 105bd389b36SDavid du Colombier skip(bp, 8); 1063e12c5d1SDavid du Colombier break; 1073e12c5d1SDavid du Colombier } 1083e12c5d1SDavid du Colombier return a; 1093e12c5d1SDavid du Colombier } 1103e12c5d1SDavid du Colombier 1113e12c5d1SDavid du Colombier static char 1123e12c5d1SDavid du Colombier type2char(int t) 1133e12c5d1SDavid du Colombier { 1143e12c5d1SDavid du Colombier switch(t){ 1153e12c5d1SDavid du Colombier case D_EXTERN: return 'U'; 1163e12c5d1SDavid du Colombier case D_STATIC: return 'b'; 1173e12c5d1SDavid du Colombier case D_AUTO: return 'a'; 1183e12c5d1SDavid du Colombier case D_PARAM: return 'p'; 1193e12c5d1SDavid du Colombier default: return UNKNOWN; 1203e12c5d1SDavid du Colombier } 1213e12c5d1SDavid du Colombier } 122bd389b36SDavid du Colombier 123bd389b36SDavid du Colombier static void 124bd389b36SDavid du Colombier skip(Biobuf *bp, int n) 125bd389b36SDavid du Colombier { 126bd389b36SDavid du Colombier while (n-- > 0) 127bd389b36SDavid du Colombier Bgetc(bp); 128bd389b36SDavid du Colombier } 129