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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1996, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#include <link.h>
#include <sys/types.h>
#include <sys/param.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <signal.h>
#include "env.h"
#include "mach.h"
static Elist *bindto_list = NULL;
static Elist *bindfrom_list = NULL;
static uint_t pidout = 0;
static pid_t pid;
static FILE *outfile = stderr;
static uint_t indent = 1;
static uint_t indent_level = 1;
static uint_t trussall = 0;
static uint_t noexit = 0;
static sigset_t iset;
/*
* It's not possible to gather the return code on routines
* which actually have a dependence on the 'stack frame structure'.
* Below is a list of known symbols which have this dependency,
* truss.so will disable the la_pltexit() entry point for these
* routines, which will remove the requirement for the extra
* stackframe that the link_auditing interface creates.
*
* NOTE: this list *must* be mainted in alphabetical order.
* if this list ever became to long a faster search mechanism
* should be considered.
*/
static char *spec_sym[] = {
#if defined(__sparc)
".stret1",
".stret2",
".stret4",
".stret8",
#endif
"__getcontext",
"_getcontext",
"_getsp",
"_longjmp",
"_setcontext",
"_setjmp",
"_siglongjmp",
"_sigsetjmp",
"_vfork",
"getcontext",
"getsp",
"longjmp",
"setcontext",
"setjmp",
"siglongjmp",
"sigsetjmp",
"vfork",
(char *)0
};
uint_t
la_version(uint_t version)
{
char *str;
if (version > LAV_CURRENT)
(void) fprintf(stderr, "truss.so: unexpected version: %d\n",
version);
build_env_list(&bindto_list, (const char *)"TRUSS_BINDTO");
build_env_list(&bindfrom_list, (const char *)"TRUSS_BINDFROM");
if (checkenv((const char *)"TRUSS_PID")) {
pidout = 1;
pid = getpid();
} else {
char *str = "LD_AUDIT=";
/*
* This disables truss output in subsequent fork()/exec
* processes.
*/
(void) putenv(str);
}
if (checkenv((const char *)"TRUSS_NOEXIT")) {
noexit++;
indent = 0;
}
if (checkenv((const char *)"TRUSS_NOINDENT"))
indent = 0;
if (checkenv((const char *)"TRUSS_ALL"))
trussall++;
if (str = checkenv((const char *)"TRUSS_OUTPUT")) {
FILE *fp;
char fname[MAXPATHLEN];
if (pidout)
(void) snprintf(fname, MAXPATHLEN, "%s.%d", str,
(int)pid);
else
(void) strncpy(fname, str, MAXPATHLEN);
if (fp = fopen(fname, (const char *)"w")) {
outfile = fp;
} else
(void) fprintf(stderr,
"truss.so: unable to open file=`%s': %s\n",
fname, strerror(errno));
}
/*
* Initalize iset to the full set of signals to be masked durring
* pltenter/pltexit
*/
(void) sigfillset(&iset);
return (LAV_CURRENT);
}
/* ARGSUSED1 */
uint_t
la_objopen(Link_map *lmp, Lmid_t lmid, uintptr_t *cookie)
{
uint_t flags;
char *basename;
static int first = 1;
if ((bindto_list == NULL) || (trussall))
flags = LA_FLG_BINDTO;
else if (check_list(bindto_list, lmp->l_name))
flags = LA_FLG_BINDTO;
else
flags = 0;
if (((bindfrom_list == NULL) && first) || trussall ||
(check_list(bindfrom_list, lmp->l_name)))
flags |= LA_FLG_BINDFROM;
first = 0;
if (flags) {
if ((basename = strrchr(lmp->l_name, '/')) != NULL)
basename++;
else
basename = lmp->l_name;
*cookie = (uintptr_t)basename;
}
return (flags);
}
/* ARGSUSED1 */
#if defined(_LP64)
uintptr_t
la_symbind64(Elf64_Sym *symp, uint_t symndx, uintptr_t *refcook,
uintptr_t *defcook, uint_t *sb_flags, const char *sym_name)
#else
uintptr_t
la_symbind32(Elf32_Sym *symp, uint_t symndx, uintptr_t *refcook,
uintptr_t *defcook, uint_t *sb_flags)
#endif
{
#if !defined(_LP64)
const char *sym_name = (const char *)symp->st_name;
#endif
if (noexit)
*sb_flags |= LA_SYMB_NOPLTEXIT;
/*
* Check to see if this symbol is one of the 'special' symbols.
* If so we disable PLTEXIT calls for that symbol.
*/
if ((*sb_flags & LA_SYMB_NOPLTEXIT) == 0) {
uint_t ndx;
char *str;
/* LINTED */
for (ndx = 0; str = spec_sym[ndx]; ndx++) {
int cmpval;
cmpval = strcmp(sym_name, str);
if (cmpval < 0)
break;
if (cmpval == 0) {
*sb_flags |= LA_SYMB_NOPLTEXIT;
break;
}
}
}
return (symp->st_value);
}
/* ARGSUSED1 */
#if defined(__sparcv9)
uintptr_t
la_sparcv9_pltenter(Elf64_Sym *symp, uint_t symndx, uintptr_t *refcookie,
uintptr_t *defcookie, La_sparcv9_regs *regset, uint_t *sb_flags,
const char *sym_name)
#elif defined(__sparc)
uintptr_t
la_sparcv8_pltenter(Elf32_Sym *symp, uint_t symndx, uintptr_t *refcookie,
uintptr_t *defcookie, La_sparcv8_regs *regset, uint_t *sb_flags)
#elif defined(__amd64)
uintptr_t
la_amd64_pltenter(Elf64_Sym *symp, uint_t symndx, uintptr_t *refcookie,
uintptr_t *defcookie, La_amd64_regs *regset, uint_t *sb_flags,
const char *sym_name)
#elif defined(__i386)
uintptr_t
la_i86_pltenter(Elf32_Sym *symp, uint_t symndx, uintptr_t *refcookie,
uintptr_t *defcookie, La_i86_regs *regset, uint_t *sb_flags)
#endif
{
char *istr;
char *defname = (char *)(*defcookie);
char *refname = (char *)(*refcookie);
#if !defined(_LP64)
const char *sym_name = (const char *)symp->st_name;
#endif
sigset_t oset;
(void) sigprocmask(SIG_BLOCK, &iset, &oset);
if (pidout)
(void) fprintf(outfile, "%5d:", (int)getpid());
if ((*sb_flags & LA_SYMB_NOPLTEXIT) == 0)
istr = "";
else
istr = "*";
(void) fprintf(outfile, "%-15s -> %15s:%-*s%s(0x%lx, 0x%lx, 0x%lx)\n",
refname, defname, indent_level, istr, sym_name,
(long)GETARG0(regset), (long)GETARG1(regset),
(long)GETARG2(regset));
(void) fflush(outfile);
if (indent && ((*sb_flags & LA_SYMB_NOPLTEXIT) == 0))
indent_level++;
(void) sigprocmask(SIG_SETMASK, &oset, NULL);
return (symp->st_value);
}
/* ARGSUSED1 */
#if defined(_LP64)
/* ARGSUSED */
uintptr_t
la_pltexit64(Elf64_Sym *symp, uint_t symndx, uintptr_t *refcookie,
uintptr_t *defcookie, uintptr_t retval, const char *sym_name)
#else
uintptr_t
la_pltexit(Elf32_Sym *symp, uint_t symndx, uintptr_t *refcookie,
uintptr_t *defcookie, uintptr_t retval)
#endif
{
char *defname = (char *)(*defcookie);
char *refname = (char *)(*refcookie);
sigset_t oset;
#if !defined(_LP64)
const char *sym_name = (const char *)symp->st_name;
#endif
(void) sigprocmask(SIG_BLOCK, &iset, &oset);
if (pidout)
(void) fprintf(outfile, "%5d:", (int)pid);
if (indent)
indent_level--;
(void) fprintf(outfile, "%-15s -> %15s:%*s%s - 0x%lx\n", refname,
defname, indent_level, "", sym_name, (ulong_t)retval);
(void) fflush(outfile);
(void) sigprocmask(SIG_SETMASK, &oset, NULL);
return (retval);
}
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