diff options
Diffstat (limited to 'debug')
| -rw-r--r-- | debug/Makefile | 6 | ||||
| -rw-r--r-- | debug/Versions | 1 | ||||
| -rw-r--r-- | debug/pread_chk.c | 9 | ||||
| -rw-r--r-- | debug/read_chk.c | 13 | ||||
| -rw-r--r-- | debug/warning-nop.c | 38 |
5 files changed, 50 insertions, 17 deletions
diff --git a/debug/Makefile b/debug/Makefile index a3f20fd9a7..c904913c35 100644 --- a/debug/Makefile +++ b/debug/Makefile @@ -24,14 +24,16 @@ subdir := debug headers := execinfo.h distribute = sigcontextinfo.h register-dump.h frame.h -routines := backtrace backtracesyms backtracesymsfd noophooks \ +routines = backtrace backtracesyms backtracesymsfd noophooks \ memcpy_chk memmove_chk mempcpy_chk memset_chk stpcpy_chk \ strcat_chk strcpy_chk strncat_chk strncpy_chk \ sprintf_chk vsprintf_chk snprintf_chk vsnprintf_chk \ printf_chk fprintf_chk vprintf_chk vfprintf_chk \ gets_chk chk_fail readonly-area fgets_chk fgets_u_chk \ read_chk pread_chk pread64_chk recv_chk recvfrom_chk \ - readlink_chk getwd_chk getcwd_chk + readlink_chk getwd_chk getcwd_chk \ + $(static-only-routines) +static-only-routines := warning-nop CFLAGS-backtrace.c = -fno-omit-frame-pointer CFLAGS-sprintf_chk.c = -D_IO_MTSAFE_IO diff --git a/debug/Versions b/debug/Versions index a4229d7852..fd97834171 100644 --- a/debug/Versions +++ b/debug/Versions @@ -22,7 +22,6 @@ libc { __fgets_chk; __fgets_unlocked_chk; __read_chk; __pread_chk; __pread64_chk; __readlink_chk; __getcwd_chk; __getwd_chk; - __memset_zero_constant_len_parameter; __recv_chk; __recvfrom_chk; } } diff --git a/debug/pread_chk.c b/debug/pread_chk.c index 6dfa2ab499..483b5d03ca 100644 --- a/debug/pread_chk.c +++ b/debug/pread_chk.c @@ -23,11 +23,8 @@ ssize_t __pread_chk (int fd, void *buf, size_t nbytes, off_t offset, size_t buflen) { - /* In case NBYTES is greater than BUFLEN, we read BUFLEN+1 bytes. - This might overflow the buffer but the damage is reduced to just - one byte. And the program will terminate right away. */ - ssize_t n = __pread (fd, buf, offset, MIN (nbytes, buflen + 1)); - if (n > 0 && (size_t) n > buflen) + if (nbytes > buflen) __chk_fail (); - return n; + + return __pread (fd, buf, offset, MIN (nbytes, buflen + 1)); } diff --git a/debug/read_chk.c b/debug/read_chk.c index 88404ed205..f738c48d6b 100644 --- a/debug/read_chk.c +++ b/debug/read_chk.c @@ -27,15 +27,12 @@ ssize_t __read_chk (int fd, void *buf, size_t nbytes, size_t buflen) { - /* In case NBYTES is greater than BUFLEN, we read BUFLEN+1 bytes. - This might overflow the buffer but the damage is reduced to just - one byte. And the program will terminate right away. */ + if (nbytes > buflen) + __chk_fail (); + #ifdef HAVE_INLINED_SYSCALLS - ssize_t n = INLINE_SYSCALL (read, 3, fd, buf, MIN (nbytes, buflen + 1)); + return = INLINE_SYSCALL (read, 3, fd, buf, nbytes); #else - ssize_t n = __read (fd, buf, MIN (nbytes, buflen + 1)); + return = __read (fd, buf, nbytes); #endif - if (n > 0 && (size_t) n > buflen) - __chk_fail (); - return n; } diff --git a/debug/warning-nop.c b/debug/warning-nop.c new file mode 100644 index 0000000000..84de3a9f17 --- /dev/null +++ b/debug/warning-nop.c @@ -0,0 +1,38 @@ +/* Dummy nop functions to elicit link-time warnings. + Copyright (C) 2005 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 <sys/cdefs.h> + +void __nop (void) +{ +} + +/* Don't insert any other #include's before this #undef! */ + +#undef __warndecl +#define __warndecl(name, msg) \ + strong_alias (__nop, name) link_warning (name, msg) + +#undef __USE_FORTIFY_LEVEL +#define __USE_FORTIFY_LEVEL 99 + +/* Following here we need an #include for each public header file + that uses __warndecl. */ + +#include <string.h> |