diff options
Diffstat (limited to 'libc/sysdeps/unix/sysv/linux/ptrace.c')
-rw-r--r-- | libc/sysdeps/unix/sysv/linux/ptrace.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/libc/sysdeps/unix/sysv/linux/ptrace.c b/libc/sysdeps/unix/sysv/linux/ptrace.c new file mode 100644 index 000000000..e33eee0ee --- /dev/null +++ b/libc/sysdeps/unix/sysv/linux/ptrace.c @@ -0,0 +1,113 @@ +/* Copyright (C) 1995,1996,1997,1998,2000,2003 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <errno.h> +#include <sys/types.h> +#include <sys/ptrace.h> +#include <sys/user.h> +#include <stdarg.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_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; +} |