3 Copyright (C) 1999-2015 Free Software Foundation, Inc.
5 This file is part of GNU Binutils.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
23 #include "search_list.h"
29 static int cmp_addr (const PTR
, const PTR
);
34 /* Initialize a symbol (so it's empty). */
39 memset (sym
, 0, sizeof (*sym
));
41 /* It is not safe to assume that a binary zero corresponds
42 to a floating-point 0.0, so initialize floats explicitly. */
44 sym
->cg
.child_time
= 0.0;
45 sym
->cg
.prop
.fract
= 0.0;
46 sym
->cg
.prop
.self
= 0.0;
47 sym
->cg
.prop
.child
= 0.0;
51 /* Compare the function entry-point of two symbols and return <0, =0,
52 or >0 depending on whether the left value is smaller than, equal
53 to, or greater than the right value. If two symbols are equal
54 but one has is_func set and the other doesn't, we make the
55 non-function symbol one "bigger" so that the function symbol will
56 survive duplicate removal. Finally, if both symbols have the
57 same is_func value, we discriminate against is_static such that
58 the global symbol survives. */
61 cmp_addr (const PTR lp
, const PTR rp
)
63 const Sym
*left
= (const Sym
*) lp
;
64 const Sym
*right
= (const Sym
*) rp
;
66 if (left
->addr
> right
->addr
)
68 else if (left
->addr
< right
->addr
)
71 if (left
->is_func
!= right
->is_func
)
72 return right
->is_func
- left
->is_func
;
74 return left
->is_static
- right
->is_static
;
79 symtab_finalize (Sym_Table
*tab
)
87 /* Sort symbol table in order of increasing function addresses. */
88 qsort (tab
->base
, tab
->len
, sizeof (Sym
), cmp_addr
);
90 /* Remove duplicate entries to speed-up later processing and
91 set end_addr if its not set yet. */
92 prev_addr
= tab
->base
[0].addr
+ 1;
94 for (src
= dst
= tab
->base
; src
< tab
->limit
; ++src
)
96 if (src
->addr
== prev_addr
)
98 /* If same address, favor global symbol over static one,
99 then function over line number. If both symbols are
100 either static or global and either function or line, check
101 whether one has name beginning with underscore while
102 the other doesn't. In such cases, keep sym without
103 underscore. This takes cares of compiler generated
104 symbols (such as __gnu_compiled, __c89_used, etc.). */
105 if ((!src
->is_static
&& dst
[-1].is_static
)
106 || ((src
->is_static
== dst
[-1].is_static
)
107 && ((src
->is_func
&& !dst
[-1].is_func
)
108 || ((src
->is_func
== dst
[-1].is_func
)
109 && ((src
->name
[0] != '_' && dst
[-1].name
[0] == '_')
111 && src
->name
[1] != '_'
112 && dst
[-1].name
[1] == '_'))))))
114 DBG (AOUTDEBUG
| IDDEBUG
,
115 printf ("[symtab_finalize] favor %s@%c%c over %s@%c%c",
116 src
->name
, src
->is_static
? 't' : 'T',
117 src
->is_func
? 'F' : 'f',
118 dst
[-1].name
, dst
[-1].is_static
? 't' : 'T',
119 dst
[-1].is_func
? 'F' : 'f');
120 printf (" (addr=%lx)\n", (unsigned long) src
->addr
));
126 DBG (AOUTDEBUG
| IDDEBUG
,
127 printf ("[symtab_finalize] favor %s@%c%c over %s@%c%c",
128 dst
[-1].name
, dst
[-1].is_static
? 't' : 'T',
129 dst
[-1].is_func
? 'F' : 'f',
130 src
->name
, src
->is_static
? 't' : 'T',
131 src
->is_func
? 'F' : 'f');
132 printf (" (addr=%lx)\n", (unsigned long) src
->addr
));
137 if (dst
> tab
->base
&& dst
[-1].end_addr
== 0)
138 dst
[-1].end_addr
= src
->addr
- 1;
140 /* Retain sym only if it has a non-empty address range. */
141 if (!src
->end_addr
|| src
->addr
<= src
->end_addr
)
145 prev_addr
= src
->addr
;
150 if (tab
->len
> 0 && dst
[-1].end_addr
== 0)
152 = core_text_sect
->vma
+ bfd_get_section_size (core_text_sect
) - 1;
154 DBG (AOUTDEBUG
| IDDEBUG
,
155 printf ("[symtab_finalize]: removed %d duplicate entries\n",
156 tab
->len
- (int) (dst
- tab
->base
)));
159 tab
->len
= tab
->limit
- tab
->base
;
161 DBG (AOUTDEBUG
| IDDEBUG
,
164 for (j
= 0; j
< tab
->len
; ++j
)
166 printf ("[symtab_finalize] 0x%lx-0x%lx\t%s\n",
167 (unsigned long) tab
->base
[j
].addr
,
168 (unsigned long) tab
->base
[j
].end_addr
,
178 dbg_sym_lookup (Sym_Table
*sym_tab
, bfd_vma address
)
180 unsigned long low
, mid
, high
;
183 fprintf (stderr
, "[dbg_sym_lookup] address 0x%lx\n",
184 (unsigned long) address
);
187 for (low
= 0, high
= sym_tab
->len
- 1; low
!= high
;)
189 mid
= (high
+ low
) >> 1;
191 fprintf (stderr
, "[dbg_sym_lookup] low=0x%lx, mid=0x%lx, high=0x%lx\n",
193 fprintf (stderr
, "[dbg_sym_lookup] sym[m]=0x%lx sym[m + 1]=0x%lx\n",
194 (unsigned long) sym
[mid
].addr
,
195 (unsigned long) sym
[mid
+ 1].addr
);
197 if (sym
[mid
].addr
<= address
&& sym
[mid
+ 1].addr
> address
)
200 if (sym
[mid
].addr
> address
)
206 fprintf (stderr
, "[dbg_sym_lookup] binary search fails???\n");
214 /* Look up an address in the symbol-table that is sorted by address.
215 If address does not hit any symbol, 0 is returned. */
217 sym_lookup (Sym_Table
*sym_tab
, bfd_vma address
)
230 for (low
= 0, high
= sym_tab
->len
- 1; low
!= high
;)
232 DBG (LOOKUPDEBUG
, ++probes
);
233 mid
= (high
+ low
) / 2;
235 if (sym
[mid
].addr
<= address
&& sym
[mid
+ 1].addr
> address
)
237 if (address
> sym
[mid
].end_addr
)
239 /* Address falls into gap between
240 sym[mid] and sym[mid + 1]. */
246 printf ("[sym_lookup] %d probes (symtab->len=%u)\n",
247 probes
, sym_tab
->len
- 1));
252 if (sym
[mid
].addr
> address
)
258 if (sym
[mid
+ 1].addr
<= address
)
260 if (address
> sym
[mid
+ 1].end_addr
)
262 /* Address is beyond end of sym[mid + 1]. */
267 DBG (LOOKUPDEBUG
, printf ("[sym_lookup] %d (%u) probes, fall off\n",
268 probes
, sym_tab
->len
- 1));
269 return &sym
[mid
+ 1];
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