97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
/*
|
|
* This file is part of ltrace.
|
|
* Copyright (C) 2004,2008,2009 Juan Cespedes
|
|
* Copyright (C) 2006 Ian Wienand
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of the
|
|
* License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
|
|
* 02110-1301 USA
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
#include <signal.h>
|
|
#include <sys/ptrace.h>
|
|
#include <asm/ptrace.h>
|
|
|
|
#include "proc.h"
|
|
#include "common.h"
|
|
#include "debug.h"
|
|
|
|
#if (!defined(PTRACE_PEEKUSER) && defined(PTRACE_PEEKUSR))
|
|
# define PTRACE_PEEKUSER PTRACE_PEEKUSR
|
|
#endif
|
|
|
|
#if (!defined(PTRACE_POKEUSER) && defined(PTRACE_POKEUSR))
|
|
# define PTRACE_POKEUSER PTRACE_POKEUSR
|
|
#endif
|
|
|
|
void
|
|
get_arch_dep(struct process *proc)
|
|
{
|
|
}
|
|
|
|
/* Returns 1 if syscall, 2 if sysret, 0 otherwise.
|
|
*/
|
|
int
|
|
syscall_p(struct process *proc, int status, int *sysnum)
|
|
{
|
|
if (WIFSTOPPED(status)
|
|
&& WSTOPSIG(status) == (SIGTRAP | proc->tracesysgood)) {
|
|
char *ip = get_instruction_pointer(proc) - 4;
|
|
long x = ptrace(PTRACE_PEEKTEXT, proc->pid, ip, 0);
|
|
debug(2, "instr: %016lx", x);
|
|
if ((x & 0xffffffff) != 0x00000083)
|
|
return 0;
|
|
*sysnum =
|
|
ptrace(PTRACE_PEEKUSER, proc->pid, 0 /* REG_R0 */ , 0);
|
|
if (proc->callstack_depth > 0 &&
|
|
proc->callstack[proc->callstack_depth - 1].is_syscall &&
|
|
proc->callstack[proc->callstack_depth - 1].c_un.syscall == *sysnum) {
|
|
return 2;
|
|
}
|
|
if (*sysnum >= 0 && *sysnum < 500) {
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
long
|
|
gimme_arg(enum tof type, struct process *proc, int arg_num,
|
|
struct arg_type_info *info)
|
|
{
|
|
if (arg_num == -1) { /* return value */
|
|
return ptrace(PTRACE_PEEKUSER, proc->pid, 0 /* REG_R0 */ , 0);
|
|
}
|
|
|
|
if (type == LT_TOF_FUNCTION || type == LT_TOF_FUNCTIONR) {
|
|
if (arg_num <= 5)
|
|
return ptrace(PTRACE_PEEKUSER, proc->pid,
|
|
arg_num + 16 /* REG_A0 */ , 0);
|
|
else
|
|
return ptrace(PTRACE_PEEKTEXT, proc->pid,
|
|
proc->stack_pointer + 8 * (arg_num - 6),
|
|
0);
|
|
} else if (type == LT_TOF_SYSCALL || type == LT_TOF_SYSCALLR) {
|
|
return ptrace(PTRACE_PEEKUSER, proc->pid,
|
|
arg_num + 16 /* REG_A0 */ , 0);
|
|
} else {
|
|
fprintf(stderr, "gimme_arg called with wrong arguments\n");
|
|
exit(1);
|
|
}
|
|
return 0;
|
|
}
|