mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-13 10:02:38 +00:00
97fa9b7739
on allocation failure instead of displaying a warning and deferencing NULL pointer after. Spelling. Add prototypes. Add list of option in synopsis section of man page, -d is not referenced because available as a compile option. It should be made a runtime option btw.
149 lines
4.5 KiB
C
149 lines
4.5 KiB
C
/*-
|
|
* Copyright (c) 1983, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#if 0
|
|
/* From: */
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)gprof.c 8.1 (Berkeley) 6/6/93";
|
|
#endif /* not lint */
|
|
#endif
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/stat.h>
|
|
#include <machine/elf.h>
|
|
|
|
#include <err.h>
|
|
#include <fcntl.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "gprof.h"
|
|
|
|
static bool wantsym(const Elf_Sym *, const char *);
|
|
|
|
/* Things which get -E excluded by default. */
|
|
static char *excludes[] = { ".mcount", "_mcleanup", NULL };
|
|
|
|
int
|
|
elf_getnfile(const char *filename, char ***defaultEs)
|
|
{
|
|
int fd;
|
|
Elf_Ehdr h;
|
|
struct stat s;
|
|
void *mapbase;
|
|
const char *base;
|
|
const Elf_Shdr *shdrs;
|
|
const Elf_Shdr *sh_symtab;
|
|
const Elf_Shdr *sh_strtab;
|
|
const char *strtab;
|
|
const Elf_Sym *symtab;
|
|
int symtabct;
|
|
int i;
|
|
|
|
if ((fd = open(filename, O_RDONLY)) == -1)
|
|
err(1, "%s", filename);
|
|
if (read(fd, &h, sizeof h) != sizeof h || !IS_ELF(h)) {
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
if (fstat(fd, &s) == -1)
|
|
err(1, "cannot fstat %s", filename);
|
|
if ((mapbase = mmap(0, s.st_size, PROT_READ, MAP_SHARED, fd, 0)) ==
|
|
MAP_FAILED)
|
|
err(1, "cannot mmap %s", filename);
|
|
close(fd);
|
|
|
|
base = (const char *)mapbase;
|
|
shdrs = (const Elf_Shdr *)(base + h.e_shoff);
|
|
|
|
/* Find the symbol table and associated string table section. */
|
|
for (i = 1; i < h.e_shnum; i++)
|
|
if (shdrs[i].sh_type == SHT_SYMTAB)
|
|
break;
|
|
if (i == h.e_shnum)
|
|
errx(1, "%s has no symbol table", filename);
|
|
sh_symtab = &shdrs[i];
|
|
sh_strtab = &shdrs[sh_symtab->sh_link];
|
|
|
|
symtab = (const Elf_Sym *)(base + sh_symtab->sh_offset);
|
|
symtabct = sh_symtab->sh_size / sh_symtab->sh_entsize;
|
|
strtab = (const char *)(base + sh_strtab->sh_offset);
|
|
|
|
/* Count the symbols that we're interested in. */
|
|
nname = 0;
|
|
for (i = 1; i < symtabct; i++)
|
|
if (wantsym(&symtab[i], strtab))
|
|
nname++;
|
|
|
|
/* Allocate memory for them, plus a terminating entry. */
|
|
if ((nl = (nltype *)calloc(nname + 1, sizeof(nltype))) == NULL)
|
|
errx(1, "insufficient memory for symbol table");
|
|
|
|
/* Read them in. */
|
|
npe = nl;
|
|
for (i = 1; i < symtabct; i++) {
|
|
const Elf_Sym *sym = &symtab[i];
|
|
|
|
if (wantsym(sym, strtab)) {
|
|
npe->value = sym->st_value;
|
|
npe->name = strtab + sym->st_name;
|
|
npe++;
|
|
}
|
|
}
|
|
npe->value = -1;
|
|
|
|
*defaultEs = excludes;
|
|
return 0;
|
|
}
|
|
|
|
static bool
|
|
wantsym(const Elf_Sym *sym, const char *strtab)
|
|
{
|
|
int type;
|
|
int bind;
|
|
|
|
type = ELF_ST_TYPE(sym->st_info);
|
|
bind = ELF_ST_BIND(sym->st_info);
|
|
|
|
if (type != STT_FUNC ||
|
|
(aflag && bind == STB_LOCAL) ||
|
|
(uflag && strchr(strtab + sym->st_name, '.') != NULL))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|