1 a84cbb2a 2004-04-19 devnull #include <u.h>
  2 a84cbb2a 2004-04-19 devnull #include <libc.h>
  3 a84cbb2a 2004-04-19 devnull #include <bio.h>
  4 a84cbb2a 2004-04-19 devnull #include "elf.h"
  5 a84cbb2a 2004-04-19 devnull #include "dwarf.h"
  6 a84cbb2a 2004-04-19 devnull 
  7 a84cbb2a 2004-04-19 devnull void printrules(Dwarf *d, ulong pc);
  8 a84cbb2a 2004-04-19 devnull int exprfmt(Fmt*);
  9 a84cbb2a 2004-04-19 devnull 
 10 a84cbb2a 2004-04-19 devnull void
 11 a84cbb2a 2004-04-19 devnull usage(void)
 12 a84cbb2a 2004-04-19 devnull {
 13 a84cbb2a 2004-04-19 devnull 	fprint(2, "usage: dwarfdump file\n");
 14 a84cbb2a 2004-04-19 devnull 	exits("usage");
 15 a84cbb2a 2004-04-19 devnull }
 16 a84cbb2a 2004-04-19 devnull 
 17 a84cbb2a 2004-04-19 devnull void
 18 a84cbb2a 2004-04-19 devnull main(int argc, char **argv)
 19 a84cbb2a 2004-04-19 devnull {
 20 a84cbb2a 2004-04-19 devnull 	int c;
 21 a84cbb2a 2004-04-19 devnull 	Elf *elf;
 22 a84cbb2a 2004-04-19 devnull 	Dwarf *d;
 23 a84cbb2a 2004-04-19 devnull 	DwarfSym s;
 24 a84cbb2a 2004-04-19 devnull 	char *cdir, *dir, *file;
 25 a84cbb2a 2004-04-19 devnull 	ulong line, mtime, length;
 26 a84cbb2a 2004-04-19 devnull 
 27 a84cbb2a 2004-04-19 devnull 	ARGBEGIN{
 28 a84cbb2a 2004-04-19 devnull 	default:
 29 a84cbb2a 2004-04-19 devnull 		usage();
 30 a84cbb2a 2004-04-19 devnull 	}ARGEND
 31 a84cbb2a 2004-04-19 devnull 
 32 a84cbb2a 2004-04-19 devnull 	if(argc != 1)
 33 a84cbb2a 2004-04-19 devnull 		usage();
 34 a84cbb2a 2004-04-19 devnull 
 35 a84cbb2a 2004-04-19 devnull 	fmtinstall('R', exprfmt);
 36 a84cbb2a 2004-04-19 devnull 	fmtinstall('H', encodefmt);
 37 a84cbb2a 2004-04-19 devnull 
 38 a84cbb2a 2004-04-19 devnull 	if((elf = elfopen(argv[0])) == nil)
 39 a84cbb2a 2004-04-19 devnull 		sysfatal("elfopen %s: %r", argv[0]);
 40 a84cbb2a 2004-04-19 devnull 	if((d=dwarfopen(elf)) == nil)
 41 a84cbb2a 2004-04-19 devnull 		sysfatal("dwarfopen: %r");
 42 a84cbb2a 2004-04-19 devnull 
 43 a84cbb2a 2004-04-19 devnull 	if(dwarfenum(d, &s) < 0)
 44 a84cbb2a 2004-04-19 devnull 		sysfatal("dwarfenumall: %r");
 45 a84cbb2a 2004-04-19 devnull 
 46 95f57b01 2004-04-21 devnull 	while(dwarfnextsym(d, &s) == 1){
 47 a84cbb2a 2004-04-19 devnull 		switch(s.attrs.tag){
 48 a84cbb2a 2004-04-19 devnull 		case TagCompileUnit:
 49 a84cbb2a 2004-04-19 devnull 			print("compileunit %s\n", s.attrs.name);
 50 a84cbb2a 2004-04-19 devnull 			break;
 51 a84cbb2a 2004-04-19 devnull 		case TagSubprogram:
 52 a84cbb2a 2004-04-19 devnull 			c = 't';
 53 a84cbb2a 2004-04-19 devnull 			goto sym;
 54 a84cbb2a 2004-04-19 devnull 		case TagVariable:
 55 a84cbb2a 2004-04-19 devnull 			c = 'd';
 56 a84cbb2a 2004-04-19 devnull 			goto sym;
 57 a84cbb2a 2004-04-19 devnull 		case TagConstant:
 58 a84cbb2a 2004-04-19 devnull 			c = 'c';
 59 a84cbb2a 2004-04-19 devnull 			goto sym;
 60 a84cbb2a 2004-04-19 devnull 		case TagFormalParameter:
 61 a84cbb2a 2004-04-19 devnull 			if(!s.attrs.name)
 62 a84cbb2a 2004-04-19 devnull 				break;
 63 a84cbb2a 2004-04-19 devnull 			c = 'p';
 64 a84cbb2a 2004-04-19 devnull 		sym:
 65 a84cbb2a 2004-04-19 devnull 			if(s.attrs.isexternal)
 66 a84cbb2a 2004-04-19 devnull 				c += 'A' - 'a';
 67 a84cbb2a 2004-04-19 devnull 			print("%c %s", c, s.attrs.name);
 68 a84cbb2a 2004-04-19 devnull 			if(s.attrs.have.lowpc)
 69 a84cbb2a 2004-04-19 devnull 				print(" 0x%lux-0x%lux", s.attrs.lowpc, s.attrs.highpc);
 70 a84cbb2a 2004-04-19 devnull 			switch(s.attrs.have.location){
 71 a84cbb2a 2004-04-19 devnull 			case TBlock:
 72 a84cbb2a 2004-04-19 devnull 				print(" @ %.*H", s.attrs.location.b.len, s.attrs.location.b.data);
 73 a84cbb2a 2004-04-19 devnull 				break;
 74 a84cbb2a 2004-04-19 devnull 			case TConstant:
 75 a84cbb2a 2004-04-19 devnull 				print(" @ 0x%lux", s.attrs.location.c);
 76 a84cbb2a 2004-04-19 devnull 				break;
 77 a84cbb2a 2004-04-19 devnull 			}
 78 a84cbb2a 2004-04-19 devnull 			if(s.attrs.have.ranges)
 79 a84cbb2a 2004-04-19 devnull 				print(" ranges@0x%lux", s.attrs.ranges);
 80 a84cbb2a 2004-04-19 devnull 			print("\n");
 81 a84cbb2a 2004-04-19 devnull 			if(s.attrs.have.lowpc){
 82 a84cbb2a 2004-04-19 devnull 				if(dwarfpctoline(d, s.attrs.lowpc, &cdir, &dir, &file, &line, &mtime, &length) < 0)
 83 a84cbb2a 2004-04-19 devnull 					print("\tcould not find source: %r\n");
 84 a84cbb2a 2004-04-19 devnull 				else
 85 a84cbb2a 2004-04-19 devnull 					print("\t%s/%s/%s:%lud mtime=%lud length=%lud\n",
 86 a84cbb2a 2004-04-19 devnull 						cdir, dir, file, line, mtime, length);
 87 a84cbb2a 2004-04-19 devnull 
 88 a84cbb2a 2004-04-19 devnull 				if(0) printrules(d, s.attrs.lowpc);
 89 a84cbb2a 2004-04-19 devnull 				if(0) printrules(d, (s.attrs.lowpc+s.attrs.highpc)/2);
 90 a84cbb2a 2004-04-19 devnull 			}
 91 a84cbb2a 2004-04-19 devnull 			break;
 92 a84cbb2a 2004-04-19 devnull 		}
 93 a84cbb2a 2004-04-19 devnull 	}
 94 a84cbb2a 2004-04-19 devnull 	exits(0);
 95 a84cbb2a 2004-04-19 devnull }
 96 a84cbb2a 2004-04-19 devnull 
 97 a84cbb2a 2004-04-19 devnull void
 98 a84cbb2a 2004-04-19 devnull printrules(Dwarf *d, ulong pc)
 99 a84cbb2a 2004-04-19 devnull {
100 a84cbb2a 2004-04-19 devnull 	int i;
101 a84cbb2a 2004-04-19 devnull 	DwarfExpr r[10];
102 a84cbb2a 2004-04-19 devnull 	DwarfExpr cfa, ra;
103 a84cbb2a 2004-04-19 devnull 
104 a84cbb2a 2004-04-19 devnull 	if(dwarfunwind(d, pc, &cfa, &ra, r, nelem(r)) < 0)
105 a84cbb2a 2004-04-19 devnull 		print("\tcannot unwind from pc 0x%lux: %r\n", pc);
106 a84cbb2a 2004-04-19 devnull 
107 a84cbb2a 2004-04-19 devnull 	print("\tpc=0x%lux cfa=%R ra=%R", pc, &cfa, &ra);
108 a84cbb2a 2004-04-19 devnull 	for(i=0; i<nelem(r); i++)
109 a84cbb2a 2004-04-19 devnull 		if(r[i].type != RuleSame)
110 a84cbb2a 2004-04-19 devnull 			print(" r%d=%R", i, &r[i]);
111 a84cbb2a 2004-04-19 devnull 	print("\n");
112 a84cbb2a 2004-04-19 devnull }
113 a84cbb2a 2004-04-19 devnull 
114 a84cbb2a 2004-04-19 devnull int
115 a84cbb2a 2004-04-19 devnull exprfmt(Fmt *fmt)
116 a84cbb2a 2004-04-19 devnull {
117 a84cbb2a 2004-04-19 devnull 	DwarfExpr *e;
118 a84cbb2a 2004-04-19 devnull 
119 a84cbb2a 2004-04-19 devnull 	if((e = va_arg(fmt->args, DwarfExpr*)) == nil)
120 a84cbb2a 2004-04-19 devnull 		return fmtstrcpy(fmt, "<nil>");
121 a84cbb2a 2004-04-19 devnull 
122 a84cbb2a 2004-04-19 devnull 	switch(e->type){
123 a84cbb2a 2004-04-19 devnull 	case RuleUndef:
124 a84cbb2a 2004-04-19 devnull 		return fmtstrcpy(fmt, "undef");
125 a84cbb2a 2004-04-19 devnull 	case RuleSame:
126 a84cbb2a 2004-04-19 devnull 		return fmtstrcpy(fmt, "same");
127 a84cbb2a 2004-04-19 devnull 	case RuleCfaOffset:
128 a84cbb2a 2004-04-19 devnull 		return fmtprint(fmt, "%ld(cfa)", e->offset);
129 a84cbb2a 2004-04-19 devnull 	case RuleRegister:
130 a84cbb2a 2004-04-19 devnull 		return fmtprint(fmt, "r%ld", e->reg);
131 a84cbb2a 2004-04-19 devnull 	case RuleRegOff:
132 a84cbb2a 2004-04-19 devnull 		return fmtprint(fmt, "%ld(r%ld)", e->offset, e->reg);
133 a84cbb2a 2004-04-19 devnull 	case RuleLocation:
134 a84cbb2a 2004-04-19 devnull 		return fmtprint(fmt, "l.%.*H", e->loc.len, e->loc.data);
135 a84cbb2a 2004-04-19 devnull 	default:
136 a84cbb2a 2004-04-19 devnull 		return fmtprint(fmt, "?%d", e->type);
137 a84cbb2a 2004-04-19 devnull 	}
138 a84cbb2a 2004-04-19 devnull }