1/*-
2 * Copyright (c) 2003-2008 Joseph Koshy
3 * Copyright (c) 2017 Ruslan Bukin <br@bsdpad.com>
4 * All rights reserved.
5 *
6 * This software was developed by BAE Systems, the University of Cambridge
7 * Computer Laboratory, and Memorial University under DARPA/AFRL contract
8 * FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent Computing
9 * (TC) research program.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include <sys/types.h>
34#include <sys/cpuset.h>
35#include <sys/event.h>
36#include <sys/param.h>
37#include <sys/socket.h>
38#include <sys/stat.h>
39#include <sys/module.h>
40#include <sys/pmc.h>
41
42#include <assert.h>
43#include <err.h>
44#include <pmc.h>
45#include <pmclog.h>
46#include <stdbool.h>
47#include <stdio.h>
48#include <stdlib.h>
49#include <string.h>
50
51#include "libpmcstat.h"
52
53struct pmcstat_symbol *
54pmcstat_symbol_search_by_name(struct pmcstat_process *pp,
55    const char *pi_name, const char *name, uintptr_t *addr_start,
56    uintptr_t *addr_end)
57{
58	struct pmcstat_symbol *sym;
59	struct pmcstat_image *image;
60	struct pmcstat_pcmap *pcm;
61	const char *name1;
62	const char *name2;
63	bool found;
64	size_t i;
65
66	found = 0;
67
68	if (pp == NULL)
69		return (NULL);
70
71	TAILQ_FOREACH(pcm, &pp->pp_map, ppm_next) {
72		image = pcm->ppm_image;
73		if (image->pi_name == NULL)
74			continue;
75		name1 = pmcstat_string_unintern(image->pi_name);
76		if (strcmp(name1, pi_name) == 0) {
77			found = 1;
78			break;
79		}
80	}
81
82	if (!found || image->pi_symbols == NULL)
83		return (NULL);
84
85	found = 0;
86
87	for (i = 0; i < image->pi_symcount; i++) {
88		sym = &image->pi_symbols[i];
89		name2 = pmcstat_string_unintern(sym->ps_name);
90		if (strcmp(name2, name) == 0) {
91			found = 1;
92			break;
93		}
94	}
95
96	if (!found)
97		return (NULL);
98
99	*addr_start = (image->pi_vaddr - image->pi_start +
100	    pcm->ppm_lowpc + sym->ps_start);
101	*addr_end = (image->pi_vaddr - image->pi_start +
102	    pcm->ppm_lowpc + sym->ps_end);
103
104	return (sym);
105}
106
107/*
108 * Helper function.
109 */
110
111int
112pmcstat_symbol_compare(const void *a, const void *b)
113{
114	const struct pmcstat_symbol *sym1, *sym2;
115
116	sym1 = (const struct pmcstat_symbol *) a;
117	sym2 = (const struct pmcstat_symbol *) b;
118
119	if (sym1->ps_end <= sym2->ps_start)
120		return (-1);
121	if (sym1->ps_start >= sym2->ps_end)
122		return (1);
123	return (0);
124}
125
126/*
127 * Map an address to a symbol in an image.
128 */
129
130struct pmcstat_symbol *
131pmcstat_symbol_search(struct pmcstat_image *image, uintfptr_t addr)
132{
133	struct pmcstat_symbol sym;
134
135	if (image->pi_symbols == NULL)
136		return (NULL);
137
138	sym.ps_name  = NULL;
139	sym.ps_start = addr;
140	sym.ps_end   = addr + 1;
141
142	return (bsearch((void *) &sym, image->pi_symbols,
143	    image->pi_symcount, sizeof(struct pmcstat_symbol),
144	    pmcstat_symbol_compare));
145}
146