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/* Copyright (C) 1995-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <sys/types.h>
#include <sys/ptrace.h>
#include <sys/user.h>
#include <stdarg.h>
#include <signal.h>
#include <sysdep.h>
#include <sys/syscall.h>
#include <bp-checks.h>
long int
ptrace (enum __ptrace_request request, ...)
{
long int res, ret;
va_list ap;
pid_t pid;
void *addr, *data;
va_start (ap, request);
pid = va_arg (ap, pid_t);
addr = va_arg (ap, void *);
data = va_arg (ap, void *);
va_end (ap);
if (request > 0 && request < 4)
data = &ret;
#if __BOUNDED_POINTERS__
switch (request)
{
case PTRACE_PEEKTEXT:
case PTRACE_PEEKDATA:
case PTRACE_PEEKUSER:
case PTRACE_POKETEXT:
case PTRACE_POKEDATA:
case PTRACE_POKEUSER:
(void) CHECK_1 ((int *) addr);
(void) CHECK_1 ((int *) data);
break;
case PTRACE_GETREGS:
case PTRACE_SETREGS:
#ifdef __i386__
(void) CHECK_1 ((struct user_regs_struct *) data);
#else
/* We don't know the size of data, so the best we can do is ensure
that `data' is valid for at least one word. */
(void) CHECK_1 ((int *) data);
#endif
break;
case PTRACE_GETFPREGS:
case PTRACE_SETFPREGS:
#ifdef __i386__
(void) CHECK_1 ((struct user_fpregs_struct *) data);
#else
/* We don't know the size of data, so the best we can do is ensure
that `data' is valid for at least one word. */
(void) CHECK_1 ((int *) data);
#endif
break;
case PTRACE_GETFPXREGS:
case PTRACE_SETFPXREGS:
#ifdef __i386__
(void) CHECK_1 ((struct user_fpxregs_struct *) data);
#else
/* We don't know the size of data, so the best we can do is ensure
that `data' is valid for at least one word. */
(void) CHECK_1 ((int *) data);
#endif
break;
case PTRACE_GETSIGINFO:
case PTRACE_SETSIGINFO:
(void) CHECK_1 ((siginfo_t *) data);
break;
case PTRACE_GETEVENTMSG:
(void) CHECK_1 ((unsigned long *) data);
break;
case PTRACE_SETOPTIONS:
(void) CHECK_1 ((long *) data);
break;
case PTRACE_TRACEME:
case PTRACE_CONT:
case PTRACE_KILL:
case PTRACE_SINGLESTEP:
case PTRACE_ATTACH:
case PTRACE_DETACH:
case PTRACE_SYSCALL:
/* Neither `data' nor `addr' needs any checks. */
break;
};
#endif
res = INLINE_SYSCALL (ptrace, 4, request, pid,
__ptrvalue (addr), __ptrvalue (data));
if (res >= 0 && request > 0 && request < 4)
{
__set_errno (0);
return ret;
}
return res;
}
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