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authorUlrich Drepper <drepper@redhat.com>2005-12-14 15:06:39 +0000
committerUlrich Drepper <drepper@redhat.com>2005-12-14 15:06:39 +0000
commit9d13fb2413921c713f83efe331e8e4d219c62c6b (patch)
tree2d44d7ac45ab2d147eb8361bbff880c365aa8ad5 /debug
parentb6ab06cef4670e02756bcdd4d2c33a49369a4346 (diff)
downloadglibc-9d13fb2413921c713f83efe331e8e4d219c62c6b.tar.gz
Moved to csu/errno-loc.c.
Diffstat (limited to 'debug')
-rw-r--r--debug/memcpy_chk.c66
-rw-r--r--debug/memmove_chk.c98
-rw-r--r--debug/mempcpy_chk.c67
-rw-r--r--debug/memset_chk.c92
-rw-r--r--debug/readonly-area.c34
-rw-r--r--debug/segfault.c214
-rw-r--r--debug/stpcpy_chk.c45
-rw-r--r--debug/stpncpy_chk.c85
-rw-r--r--debug/strcat_chk.c58
-rw-r--r--debug/strcpy_chk.c68
-rw-r--r--debug/strncat_chk.c100
-rw-r--r--debug/strncpy_chk.c89
12 files changed, 1016 insertions, 0 deletions
diff --git a/debug/memcpy_chk.c b/debug/memcpy_chk.c
new file mode 100644
index 0000000000..638cd0e4fb
--- /dev/null
+++ b/debug/memcpy_chk.c
@@ -0,0 +1,66 @@
+/* Copy memory to memory until the specified number of bytes
+ has been copied with error checking. Overlap is NOT handled correctly.
+ Copyright (C) 1991, 1997, 2003, 2004 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Torbjorn Granlund (tege@sics.se).
+
+ 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 <string.h>
+#include <memcopy.h>
+#include <pagecopy.h>
+
+void *
+__memcpy_chk (dstpp, srcpp, len, dstlen)
+ void *dstpp;
+ const void *srcpp;
+ size_t len;
+ size_t dstlen;
+{
+ if (__builtin_expect (dstlen < len, 0))
+ __chk_fail ();
+
+ unsigned long int dstp = (long int) dstpp;
+ unsigned long int srcp = (long int) srcpp;
+
+ /* Copy from the beginning to the end. */
+
+ /* If there not too few bytes to copy, use word copy. */
+ if (len >= OP_T_THRES)
+ {
+ /* Copy just a few bytes to make DSTP aligned. */
+ len -= (-dstp) % OPSIZ;
+ BYTE_COPY_FWD (dstp, srcp, (-dstp) % OPSIZ);
+
+ /* Copy whole pages from SRCP to DSTP by virtual address manipulation,
+ as much as possible. */
+
+ PAGE_COPY_FWD_MAYBE (dstp, srcp, len, len);
+
+ /* Copy from SRCP to DSTP taking advantage of the known alignment of
+ DSTP. Number of bytes remaining is put in the third argument,
+ i.e. in LEN. This number may vary from machine to machine. */
+
+ WORD_COPY_FWD (dstp, srcp, len, len);
+
+ /* Fall out and copy the tail. */
+ }
+
+ /* There are just a few bytes to copy. Use byte memory operations. */
+ BYTE_COPY_FWD (dstp, srcp, len);
+
+ return dstpp;
+}
diff --git a/debug/memmove_chk.c b/debug/memmove_chk.c
new file mode 100644
index 0000000000..f3b74d23d9
--- /dev/null
+++ b/debug/memmove_chk.c
@@ -0,0 +1,98 @@
+/* Copy memory to memory until the specified number of bytes
+ has been copied with error checking. Overlap is handled correctly.
+ Copyright (C) 1991,1995,1996,1997,2003,2004 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Torbjorn Granlund (tege@sics.se).
+
+ 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 <string.h>
+#include <memcopy.h>
+#include <pagecopy.h>
+
+void *
+__memmove_chk (dest, src, len, destlen)
+ void *dest;
+ const void *src;
+ size_t len;
+ size_t destlen;
+{
+ if (__builtin_expect (destlen < len, 0))
+ __chk_fail ();
+
+ unsigned long int dstp = (long int) dest;
+ unsigned long int srcp = (long int) src;
+
+ /* This test makes the forward copying code be used whenever possible.
+ Reduces the working set. */
+ if (dstp - srcp >= len) /* *Unsigned* compare! */
+ {
+ /* Copy from the beginning to the end. */
+
+ /* If there not too few bytes to copy, use word copy. */
+ if (len >= OP_T_THRES)
+ {
+ /* Copy just a few bytes to make DSTP aligned. */
+ len -= (-dstp) % OPSIZ;
+ BYTE_COPY_FWD (dstp, srcp, (-dstp) % OPSIZ);
+
+ /* Copy whole pages from SRCP to DSTP by virtual address
+ manipulation, as much as possible. */
+
+ PAGE_COPY_FWD_MAYBE (dstp, srcp, len, len);
+
+ /* Copy from SRCP to DSTP taking advantage of the known
+ alignment of DSTP. Number of bytes remaining is put
+ in the third argument, i.e. in LEN. This number may
+ vary from machine to machine. */
+
+ WORD_COPY_FWD (dstp, srcp, len, len);
+
+ /* Fall out and copy the tail. */
+ }
+
+ /* There are just a few bytes to copy. Use byte memory operations. */
+ BYTE_COPY_FWD (dstp, srcp, len);
+ }
+ else
+ {
+ /* Copy from the end to the beginning. */
+ srcp += len;
+ dstp += len;
+
+ /* If there not too few bytes to copy, use word copy. */
+ if (len >= OP_T_THRES)
+ {
+ /* Copy just a few bytes to make DSTP aligned. */
+ len -= dstp % OPSIZ;
+ BYTE_COPY_BWD (dstp, srcp, dstp % OPSIZ);
+
+ /* Copy from SRCP to DSTP taking advantage of the known
+ alignment of DSTP. Number of bytes remaining is put
+ in the third argument, i.e. in LEN. This number may
+ vary from machine to machine. */
+
+ WORD_COPY_BWD (dstp, srcp, len, len);
+
+ /* Fall out and copy the tail. */
+ }
+
+ /* There are just a few bytes to copy. Use byte memory operations. */
+ BYTE_COPY_BWD (dstp, srcp, len);
+ }
+
+ return dest;
+}
diff --git a/debug/mempcpy_chk.c b/debug/mempcpy_chk.c
new file mode 100644
index 0000000000..5297bbab92
--- /dev/null
+++ b/debug/mempcpy_chk.c
@@ -0,0 +1,67 @@
+/* Copy memory to memory until the specified number of bytes
+ has been copied, return pointer to following byte, with error checking.
+ Overlap is NOT handled correctly.
+ Copyright (C) 1991, 1997, 1998, 2002, 2004 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Torbjorn Granlund (tege@sics.se).
+
+ 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 <string.h>
+#include <memcopy.h>
+#include <pagecopy.h>
+
+void *
+__mempcpy_chk (dstpp, srcpp, len, dstlen)
+ void *dstpp;
+ const void *srcpp;
+ size_t len;
+ size_t dstlen;
+{
+ if (__builtin_expect (dstlen < len, 0))
+ __chk_fail ();
+
+ unsigned long int dstp = (long int) dstpp;
+ unsigned long int srcp = (long int) srcpp;
+
+ /* Copy from the beginning to the end. */
+
+ /* If there not too few bytes to copy, use word copy. */
+ if (len >= OP_T_THRES)
+ {
+ /* Copy just a few bytes to make DSTP aligned. */
+ len -= (-dstp) % OPSIZ;
+ BYTE_COPY_FWD (dstp, srcp, (-dstp) % OPSIZ);
+
+ /* Copy whole pages from SRCP to DSTP by virtual address manipulation,
+ as much as possible. */
+
+ PAGE_COPY_FWD_MAYBE (dstp, srcp, len, len);
+
+ /* Copy from SRCP to DSTP taking advantage of the known alignment of
+ DSTP. Number of bytes remaining is put in the third argument,
+ i.e. in LEN. This number may vary from machine to machine. */
+
+ WORD_COPY_FWD (dstp, srcp, len, len);
+
+ /* Fall out and copy the tail. */
+ }
+
+ /* There are just a few bytes to copy. Use byte memory operations. */
+ BYTE_COPY_FWD (dstp, srcp, len);
+
+ return (void *) dstp;
+}
diff --git a/debug/memset_chk.c b/debug/memset_chk.c
new file mode 100644
index 0000000000..d6206ffc99
--- /dev/null
+++ b/debug/memset_chk.c
@@ -0,0 +1,92 @@
+/* Copyright (C) 1991, 1997, 2003, 2004, 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 <string.h>
+#include <memcopy.h>
+
+void *
+__memset_chk (dstpp, c, len, dstlen)
+ void *dstpp;
+ int c;
+ size_t len;
+ size_t dstlen;
+{
+ if (__builtin_expect (dstlen < len, 0))
+ __chk_fail ();
+
+ long int dstp = (long int) dstpp;
+
+ if (len >= 8)
+ {
+ size_t xlen;
+ op_t cccc;
+
+ cccc = (unsigned char) c;
+ cccc |= cccc << 8;
+ cccc |= cccc << 16;
+ if (OPSIZ > 4)
+ /* Do the shift in two steps to avoid warning if long has 32 bits. */
+ cccc |= (cccc << 16) << 16;
+
+ /* There are at least some bytes to set.
+ No need to test for LEN == 0 in this alignment loop. */
+ while (dstp % OPSIZ != 0)
+ {
+ ((byte *) dstp)[0] = c;
+ dstp += 1;
+ len -= 1;
+ }
+
+ /* Write 8 `op_t' per iteration until less than 8 `op_t' remain. */
+ xlen = len / (OPSIZ * 8);
+ while (xlen > 0)
+ {
+ ((op_t *) dstp)[0] = cccc;
+ ((op_t *) dstp)[1] = cccc;
+ ((op_t *) dstp)[2] = cccc;
+ ((op_t *) dstp)[3] = cccc;
+ ((op_t *) dstp)[4] = cccc;
+ ((op_t *) dstp)[5] = cccc;
+ ((op_t *) dstp)[6] = cccc;
+ ((op_t *) dstp)[7] = cccc;
+ dstp += 8 * OPSIZ;
+ xlen -= 1;
+ }
+ len %= OPSIZ * 8;
+
+ /* Write 1 `op_t' per iteration until less than OPSIZ bytes remain. */
+ xlen = len / OPSIZ;
+ while (xlen > 0)
+ {
+ ((op_t *) dstp)[0] = cccc;
+ dstp += OPSIZ;
+ xlen -= 1;
+ }
+ len %= OPSIZ;
+ }
+
+ /* Write the last few bytes. */
+ while (len > 0)
+ {
+ ((byte *) dstp)[0] = c;
+ dstp += 1;
+ len -= 1;
+ }
+
+ return dstpp;
+}
diff --git a/debug/readonly-area.c b/debug/readonly-area.c
new file mode 100644
index 0000000000..4b8172f193
--- /dev/null
+++ b/debug/readonly-area.c
@@ -0,0 +1,34 @@
+/* Copyright (C) 2004 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 <stdlib.h>
+
+/* Return 1 if the whole area PTR .. PTR+SIZE is not writable.
+ Return -1 if it is writable. */
+
+int
+__readonly_area (const void *ptr, size_t size)
+{
+ /* We cannot determine in general whether memory is writable or not.
+ This must be handled in a system-dependent manner. to not
+ unconditionally break code we need to return here a positive
+ answer. This disables this security measure but that is the
+ price people have to pay for using systems without a real
+ implementation of this interface. */
+ return 1;
+}
diff --git a/debug/segfault.c b/debug/segfault.c
new file mode 100644
index 0000000000..f141fff661
--- /dev/null
+++ b/debug/segfault.c
@@ -0,0 +1,214 @@
+/* Catch segmentation faults and print backtrace.
+ Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004
+ Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
+
+ 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 <alloca.h>
+#include <ctype.h>
+#include <errno.h>
+#include <execinfo.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdio-common/_itoa.h>
+#include <ldsodefs.h>
+
+#include <bp-checks.h>
+
+/* This file defines macros to access the content of the sigcontext element
+ passed up by the signal handler. */
+#include <sigcontextinfo.h>
+
+/* Get code to possibly dump the content of all registers. */
+#include <register-dump.h>
+
+/* We'll use tis a lot. */
+#define WRITE_STRING(s) write (fd, s, strlen (s))
+
+/* Name of the output file. */
+static const char *fname;
+
+
+/* We better should not use `strerror' since it can call far too many
+ other functions which might fail. Do it here ourselves. */
+static void
+write_strsignal (int fd, int signal)
+{
+ if (signal < 0 || signal >= _NSIG || _sys_siglist[signal] == NULL)
+ {
+ char buf[30];
+ char *ptr = _itoa_word (signal, &buf[sizeof (buf)], 10, 0);
+ WRITE_STRING ("signal ");
+ write (fd, buf, &buf[sizeof (buf)] - ptr);
+ }
+ else
+ WRITE_STRING (_sys_siglist[signal]);
+}
+
+
+/* This function is called when a segmentation fault is caught. The system
+ is in an instable state now. This means especially that malloc() might
+ not work anymore. */
+static void
+catch_segfault (int signal, SIGCONTEXT ctx)
+{
+ int fd, cnt, i;
+ void **arr;
+ struct sigaction sa;
+ uintptr_t pc;
+
+ /* This is the name of the file we are writing to. If none is given
+ or we cannot write to this file write to stderr. */
+ fd = 2;
+ if (fname != NULL)
+ {
+ fd = open (fname, O_TRUNC | O_WRONLY | O_CREAT, 0666);
+ if (fd == -1)
+ fd = 2;
+ }
+
+ WRITE_STRING ("*** ");
+ write_strsignal (fd, signal);
+ WRITE_STRING ("\n");
+
+#ifdef REGISTER_DUMP
+ REGISTER_DUMP;
+#endif
+
+ WRITE_STRING ("\nBacktrace:\n");
+
+ /* Get the backtrace. */
+ arr = alloca (256 * sizeof (void *));
+ cnt = backtrace (arr, 256);
+
+ /* Now try to locate the PC from signal context in the backtrace.
+ Normally it will be found at arr[2], but it might appear later
+ if there were some signal handler wrappers. Allow a few bytes
+ difference to cope with as many arches as possible. */
+ pc = (uintptr_t) GET_PC (ctx);
+ for (i = 0; i < cnt; ++i)
+ if ((uintptr_t) arr[i] >= pc - 16 && (uintptr_t) arr[i] <= pc + 16)
+ break;
+
+ /* If we haven't found it, better dump full backtrace even including
+ the signal handler frames instead of not dumping anything. */
+ if (i == cnt)
+ i = 0;
+
+ /* Now generate nicely formatted output. */
+ __backtrace_symbols_fd (arr + i, cnt - i, fd);
+
+#ifdef HAVE_PROC_SELF
+ /* Now the link map. */
+ int mapfd = open ("/proc/self/maps", O_RDONLY);
+ if (mapfd != -1)
+ {
+ write (fd, "\nMemory map:\n\n", 14);
+
+ char buf[256];
+ ssize_t n;
+
+ while ((n = TEMP_FAILURE_RETRY (read (mapfd, buf, sizeof (buf)))) > 0)
+ TEMP_FAILURE_RETRY (write (fd, buf, n));
+
+ close (mapfd);
+ }
+#endif
+
+ /* Pass on the signal (so that a core file is produced). */
+ sa.sa_handler = SIG_DFL;
+ sigemptyset (&sa.sa_mask);
+ sa.sa_flags = 0;
+ sigaction (signal, &sa, NULL);
+ raise (signal);
+}
+
+
+static void
+__attribute__ ((constructor))
+install_handler (void)
+{
+ struct sigaction sa;
+ const char *sigs = getenv ("SEGFAULT_SIGNALS");
+ const char *name;
+
+ sa.sa_handler = (void *) catch_segfault;
+ sigemptyset (&sa.sa_mask);
+ sa.sa_flags = SA_RESTART;
+
+ /* Maybe we are expected to use an alternative stack. */
+ if (getenv ("SEGFAULT_USE_ALTSTACK") != 0)
+ {
+ void *stack_mem = malloc (2 * SIGSTKSZ);
+ struct sigaltstack ss;
+
+ if (stack_mem != NULL)
+ {
+ ss.ss_sp = stack_mem;
+ ss.ss_flags = 0;
+ ss.ss_size = 2 * SIGSTKSZ;
+
+ if (sigaltstack (&ss, NULL) == 0)
+ sa.sa_flags |= SA_ONSTACK;
+ }
+ }
+
+ if (sigs == NULL)
+ sigaction (SIGSEGV, &sa, NULL);
+ else if (sigs[0] == '\0')
+ /* Do not do anything. */
+ return;
+ else
+ {
+ const char *where;
+ int all = __strcasecmp (sigs, "all") == 0;
+
+#define INSTALL_FOR_SIG(sig, name) \
+ where = __strcasestr (sigs, name); \
+ if (all || (where != NULL \
+ && (where == sigs || !isalnum (where[-1])) \
+ && !isalnum (where[sizeof (name) - 1]))) \
+ sigaction (sig, &sa, NULL);
+
+ INSTALL_FOR_SIG (SIGSEGV, "segv");
+ INSTALL_FOR_SIG (SIGILL, "ill");
+#ifdef SIGBUS
+ INSTALL_FOR_SIG (SIGBUS, "bus");
+#endif
+#ifdef SIGSTKFLT
+ INSTALL_FOR_SIG (SIGSTKFLT, "stkflt");
+#endif
+ INSTALL_FOR_SIG (SIGABRT, "abrt");
+ INSTALL_FOR_SIG (SIGFPE, "fpe");
+ }
+
+ /* Preserve the output file name if there is any given. */
+ name = getenv ("SEGFAULT_OUTPUT_NAME");
+ if (name != NULL && name[0] != '\0')
+ {
+ int ret = access (name, R_OK | W_OK);
+
+ if (ret == 0 || (ret == -1 && errno == ENOENT))
+ fname = __strdup (name);
+ }
+}
diff --git a/debug/stpcpy_chk.c b/debug/stpcpy_chk.c
new file mode 100644
index 0000000000..dacda0115a
--- /dev/null
+++ b/debug/stpcpy_chk.c
@@ -0,0 +1,45 @@
+/* Copyright (C) 1992, 1995, 1997, 2002, 2004 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. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <string.h>
+
+
+/* Copy SRC to DEST, returning the address of the terminating '\0' in DEST. */
+char *
+__stpcpy_chk (dest, src, destlen)
+ char *dest;
+ const char *src;
+ size_t destlen;
+{
+ register char *d = dest;
+ register const char *s = src;
+
+ do
+ {
+ if (__builtin_expect (destlen-- == 0, 0))
+ __chk_fail ();
+ *d++ = *s;
+ }
+ while (*s++ != '\0');
+
+ return d - 1;
+}
diff --git a/debug/stpncpy_chk.c b/debug/stpncpy_chk.c
new file mode 100644
index 0000000000..d136339dea
--- /dev/null
+++ b/debug/stpncpy_chk.c
@@ -0,0 +1,85 @@
+/* Copyright (C) 1993,1995,1996,1997,2002,2005 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. */
+
+/* This is almost copied from strncpy.c, written by Torbjorn Granlund. */
+
+#include <string.h>
+
+
+/* Copy no more than N characters of SRC to DEST, returning the address of
+ the terminating '\0' in DEST, if any, or else DEST + N. */
+char *
+__stpncpy_chk (char *dest, const char *src, size_t n, size_t destlen)
+{
+ char c;
+ char *s = dest;
+
+ if (__builtin_expect (destlen < n, 0))
+ __chk_fail ();
+
+ if (n >= 4)
+ {
+ size_t n4 = n >> 2;
+
+ for (;;)
+ {
+ c = *src++;
+ *dest++ = c;
+ if (c == '\0')
+ break;
+ c = *src++;
+ *dest++ = c;
+ if (c == '\0')
+ break;
+ c = *src++;
+ *dest++ = c;
+ if (c == '\0')
+ break;
+ c = *src++;
+ *dest++ = c;
+ if (c == '\0')
+ break;
+ if (--n4 == 0)
+ goto last_chars;
+ }
+ n -= dest - s;
+ goto zero_fill;
+ }
+
+ last_chars:
+ n &= 3;
+ if (n == 0)
+ return dest;
+
+ for (;;)
+ {
+ c = *src++;
+ --n;
+ *dest++ = c;
+ if (c == '\0')
+ break;
+ if (n == 0)
+ return dest;
+ }
+
+ zero_fill:
+ while (n-- > 0)
+ dest[n] = '\0';
+
+ return dest - 1;
+}
diff --git a/debug/strcat_chk.c b/debug/strcat_chk.c
new file mode 100644
index 0000000000..b3fb3470b7
--- /dev/null
+++ b/debug/strcat_chk.c
@@ -0,0 +1,58 @@
+/* Copyright (C) 1991, 1997, 2003, 2004 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 <string.h>
+#include <memcopy.h>
+
+
+/* Append SRC on the end of DEST. */
+char *
+__strcat_chk (dest, src, destlen)
+ char *dest;
+ const char *src;
+ size_t destlen;
+{
+ char *s1 = dest;
+ const char *s2 = src;
+ reg_char c;
+
+ /* Find the end of the string. */
+ do
+ {
+ if (__builtin_expect (destlen-- == 0, 0))
+ __chk_fail ();
+ c = *s1++;
+ }
+ while (c != '\0');
+
+ /* Make S1 point before the next character, so we can increment
+ it while memory is read (wins on pipelined cpus). */
+ ++destlen;
+ s1 -= 2;
+
+ do
+ {
+ if (__builtin_expect (destlen-- == 0, 0))
+ __chk_fail ();
+ c = *s2++;
+ *++s1 = c;
+ }
+ while (c != '\0');
+
+ return dest;
+}
diff --git a/debug/strcpy_chk.c b/debug/strcpy_chk.c
new file mode 100644
index 0000000000..a4d909feda
--- /dev/null
+++ b/debug/strcpy_chk.c
@@ -0,0 +1,68 @@
+/* Copyright (C) 1991, 1997, 2000, 2003, 2004 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 <stddef.h>
+#include <string.h>
+#include <memcopy.h>
+
+#undef strcpy
+
+/* Copy SRC to DEST with checking of destination buffer overflow. */
+char *
+__strcpy_chk (dest, src, destlen)
+ char *dest;
+ const char *src;
+ size_t destlen;
+{
+ reg_char c;
+ char *s = (char *) src;
+ const ptrdiff_t off = dest - s;
+
+ while (__builtin_expect (destlen >= 4, 0))
+ {
+ c = s[0];
+ s[off] = c;
+ if (c == '\0')
+ return dest;
+ c = s[1];
+ s[off + 1] = c;
+ if (c == '\0')
+ return dest;
+ c = s[2];
+ s[off + 2] = c;
+ if (c == '\0')
+ return dest;
+ c = s[3];
+ s[off + 3] = c;
+ if (c == '\0')
+ return dest;
+ destlen -= 4;
+ s += 4;
+ }
+
+ do
+ {
+ if (__builtin_expect (destlen-- == 0, 0))
+ __chk_fail ();
+ c = *s;
+ *(s++ + off) = c;
+ }
+ while (c != '\0');
+
+ return dest;
+}
diff --git a/debug/strncat_chk.c b/debug/strncat_chk.c
new file mode 100644
index 0000000000..953b435a4b
--- /dev/null
+++ b/debug/strncat_chk.c
@@ -0,0 +1,100 @@
+/* Copyright (C) 1991, 1997, 2004 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 <string.h>
+
+#include <memcopy.h>
+
+
+char *
+__strncat_chk (s1, s2, n, s1len)
+ char *s1;
+ const char *s2;
+ size_t n;
+ size_t s1len;
+{
+ reg_char c;
+ char *s = s1;
+
+ /* Find the end of S1. */
+ do
+ {
+ if (__builtin_expect (s1len-- == 0, 0))
+ __chk_fail ();
+ c = *s1++;
+ }
+ while (c != '\0');
+
+ /* Make S1 point before next character, so we can increment
+ it while memory is read (wins on pipelined cpus). */
+ ++s1len;
+ s1 -= 2;
+
+ if (n >= 4)
+ {
+ size_t n4 = n >> 2;
+ do
+ {
+ if (__builtin_expect (s1len-- == 0, 0))
+ __chk_fail ();
+ c = *s2++;
+ *++s1 = c;
+ if (c == '\0')
+ return s;
+ if (__builtin_expect (s1len-- == 0, 0))
+ __chk_fail ();
+ c = *s2++;
+ *++s1 = c;
+ if (c == '\0')
+ return s;
+ if (__builtin_expect (s1len-- == 0, 0))
+ __chk_fail ();
+ c = *s2++;
+ *++s1 = c;
+ if (c == '\0')
+ return s;
+ if (__builtin_expect (s1len-- == 0, 0))
+ __chk_fail ();
+ c = *s2++;
+ *++s1 = c;
+ if (c == '\0')
+ return s;
+ } while (--n4 > 0);
+ n &= 3;
+ }
+
+ while (n > 0)
+ {
+ if (__builtin_expect (s1len-- == 0, 0))
+ __chk_fail ();
+ c = *s2++;
+ *++s1 = c;
+ if (c == '\0')
+ return s;
+ n--;
+ }
+
+ if (c != '\0')
+ {
+ if (__builtin_expect (s1len-- == 0, 0))
+ __chk_fail ();
+ *++s1 = '\0';
+ }
+
+ return s;
+}
diff --git a/debug/strncpy_chk.c b/debug/strncpy_chk.c
new file mode 100644
index 0000000000..bdede7738b
--- /dev/null
+++ b/debug/strncpy_chk.c
@@ -0,0 +1,89 @@
+/* Copyright (C) 1991, 1997, 2003, 2004 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 <string.h>
+#include <memcopy.h>
+
+
+char *
+__strncpy_chk (s1, s2, n, s1len)
+ char *s1;
+ const char *s2;
+ size_t n;
+ size_t s1len;
+{
+ reg_char c;
+ char *s = s1;
+
+ if (__builtin_expect (s1len < n, 0))
+ __chk_fail ();
+
+ --s1;
+
+ if (n >= 4)
+ {
+ size_t n4 = n >> 2;
+
+ for (;;)
+ {
+ c = *s2++;
+ *++s1 = c;
+ if (c == '\0')
+ break;
+ c = *s2++;
+ *++s1 = c;
+ if (c == '\0')
+ break;
+ c = *s2++;
+ *++s1 = c;
+ if (c == '\0')
+ break;
+ c = *s2++;
+ *++s1 = c;
+ if (c == '\0')
+ break;
+ if (--n4 == 0)
+ goto last_chars;
+ }
+ n = n - (s1 - s) - 1;
+ if (n == 0)
+ return s;
+ goto zero_fill;
+ }
+
+ last_chars:
+ n &= 3;
+ if (n == 0)
+ return s;
+
+ do
+ {
+ c = *s2++;
+ *++s1 = c;
+ if (--n == 0)
+ return s;
+ }
+ while (c != '\0');
+
+ zero_fill:
+ do
+ *++s1 = '\0';
+ while (--n > 0);
+
+ return s;
+}