diff options
Diffstat (limited to 'debug')
| -rw-r--r-- | debug/memcpy_chk.c | 66 | ||||
| -rw-r--r-- | debug/memmove_chk.c | 98 | ||||
| -rw-r--r-- | debug/mempcpy_chk.c | 67 | ||||
| -rw-r--r-- | debug/memset_chk.c | 92 | ||||
| -rw-r--r-- | debug/readonly-area.c | 34 | ||||
| -rw-r--r-- | debug/segfault.c | 214 | ||||
| -rw-r--r-- | debug/stpcpy_chk.c | 45 | ||||
| -rw-r--r-- | debug/stpncpy_chk.c | 85 | ||||
| -rw-r--r-- | debug/strcat_chk.c | 58 | ||||
| -rw-r--r-- | debug/strcpy_chk.c | 68 | ||||
| -rw-r--r-- | debug/strncat_chk.c | 100 | ||||
| -rw-r--r-- | debug/strncpy_chk.c | 89 |
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; +} |