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Update.
* posix/Makefile (tests): Add tst-mmap. * posix/tst-mmap.c: New file. * sysdeps/unix/sysv/linux/i386/mmap64.S: Pop registers after mmap2 call before handling error.
This commit is contained in:
Ulrich Drepper
parent
29b3c4f2ad
commit
56b6e214d5
@ -1,5 +1,11 @@
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2000-01-02 Ulrich Drepper <drepper@cygnus.com>
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* posix/Makefile (tests): Add tst-mmap.
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* posix/tst-mmap.c: New file.
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* sysdeps/unix/sysv/linux/i386/mmap64.S: Pop registers after mmap2
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call before handling error.
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* sysdeps/unix/sysv/linux/i386/mmap64.S: Handle unaligned offsets.
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* sysdeps/unix/sysv/linux/i386/mmap.S: Likewise.
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@ -1,4 +1,4 @@
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# Copyright (C) 1991,92,93,94,95,96,97,98,99 Free Software Foundation, Inc.
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# Copyright (C) 1991-1999, 2000 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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# The GNU C Library is free software; you can redistribute it and/or
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@ -57,7 +57,7 @@ include ../Makeconfig
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aux := init-posix environ
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tests := tstgetopt testfnm runtests runptests \
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tst-preadwrite test-vfork regexbug1 tst-getlogin
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tst-preadwrite test-vfork regexbug1 tst-getlogin tst-mmap
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ifeq (yes,$(build-shared))
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test-srcs := globtest
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tests += wordexp-test
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196
posix/tst-mmap.c
Normal file
196
posix/tst-mmap.c
Normal file
@ -0,0 +1,196 @@
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#include <assert.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/mman.h>
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int
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main (void)
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{
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int result = 0;
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FILE *fp;
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int c;
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char buf[1000];
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int fd;
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char *ptr;
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size_t ps = sysconf (_SC_PAGESIZE);
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void *mem;
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/* Create a file and put some data in it. */
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fp = tmpfile ();
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if (fp == NULL)
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{
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printf ("Cannot create temporary file: %m\n");
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return 1;
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}
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fd = fileno (fp);
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for (c = 0; c < sizeof (buf); ++c)
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buf[c] = '0' + (c % 10);
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for (c = 0; c < 20; ++c)
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if (fwrite (buf, 1, sizeof (buf), fp) != sizeof (buf))
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{
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printf ("`fwrite' failed: %m\n");
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return 1;
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}
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assert (ps + 1000 < c * sizeof (buf));
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/* First try something which is not allowed: map at an offset which is
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not module the pagesize. */
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ptr = mmap (NULL, 1000, PROT_READ, MAP_SHARED, fd, ps - 1);
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if (ptr != MAP_FAILED)
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{
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puts ("mapping at offset with mod pagesize != 0 succeeded!");
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result = 1;
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}
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else if (errno != EINVAL && errno != ENOSYS)
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{
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puts ("wrong error value for mapping at offset with mod pagesize != 0: %m (should be EINVAL)");
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result = 1;
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}
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/* Try the same for mmap64. */
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ptr = mmap64 (NULL, 1000, PROT_READ, MAP_SHARED, fd, ps - 1);
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if (ptr != MAP_FAILED)
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{
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puts ("mapping at offset with mod pagesize != 0 succeeded!");
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result = 1;
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}
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else if (errno != EINVAL && errno != ENOSYS)
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{
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puts ("wrong error value for mapping at offset with mod pagesize != 0: %m (should be EINVAL)");
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result = 1;
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}
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/* And the same for private mapping. */
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ptr = mmap (NULL, 1000, PROT_READ, MAP_PRIVATE, fd, ps - 1);
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if (ptr != MAP_FAILED)
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{
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puts ("mapping at offset with mod pagesize != 0 succeeded!");
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result = 1;
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}
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else if (errno != EINVAL && errno != ENOSYS)
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{
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puts ("wrong error value for mapping at offset with mod pagesize != 0: %m (should be EINVAL)");
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result = 1;
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}
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/* Try the same for mmap64. */
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ptr = mmap64 (NULL, 1000, PROT_READ, MAP_PRIVATE, fd, ps - 1);
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if (ptr != MAP_FAILED)
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{
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puts ("mapping at offset with mod pagesize != 0 succeeded!");
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result = 1;
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}
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else if (errno != EINVAL && errno != ENOSYS)
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{
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puts ("wrong error value for mapping at offset with mod pagesize != 0: %m (should be EINVAL)");
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result = 1;
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}
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/* Get a valid address. */
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mem = malloc (2 * ps);
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if (mem != NULL)
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{
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/* Now we map at an address which is not mod pagesize. */
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ptr = mmap (mem + 1, 1000, PROT_READ, MAP_SHARED | MAP_FIXED, fd, ps);
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if (ptr != MAP_FAILED)
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{
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puts ("mapping at address with mod pagesize != 0 succeeded!");
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result = 1;
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}
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else if (errno != EINVAL && errno != ENOSYS)
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{
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puts ("wrong error value for mapping at address with mod pagesize != 0: %m (should be EINVAL)");
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result = 1;
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}
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/* Try the same for mmap64. */
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ptr = mmap64 (mem + 1, 1000, PROT_READ, MAP_SHARED | MAP_FIXED, fd, ps);
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if (ptr != MAP_FAILED)
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{
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puts ("mapping at address with mod pagesize != 0 succeeded!");
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result = 1;
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}
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else if (errno != EINVAL && errno != ENOSYS)
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{
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puts ("wrong error value for mapping at address with mod pagesize != 0: %m (should be EINVAL)");
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result = 1;
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}
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/* And again for MAP_PRIVATE. */
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ptr = mmap (mem + 1, 1000, PROT_READ, MAP_PRIVATE | MAP_FIXED, fd, ps);
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if (ptr != MAP_FAILED)
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{
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puts ("mapping at address with mod pagesize != 0 succeeded!");
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result = 1;
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}
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else if (errno != EINVAL && errno != ENOSYS)
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{
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puts ("wrong error value for mapping at address with mod pagesize != 0: %m (should be EINVAL)");
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result = 1;
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}
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/* Try the same for mmap64. */
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ptr = mmap64 (mem + 1, 1000, PROT_READ, MAP_PRIVATE | MAP_FIXED, fd, ps);
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if (ptr != MAP_FAILED)
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{
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puts ("mapping at address with mod pagesize != 0 succeeded!");
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result = 1;
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}
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else if (errno != EINVAL && errno != ENOSYS)
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{
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puts ("wrong error value for mapping at address with mod pagesize != 0: %m (should be EINVAL)");
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result = 1;
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}
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free (mem);
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}
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/* Now map the memory and see whether the content of the mapped area
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is correct. */
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ptr = mmap (NULL, 1000, PROT_READ, MAP_SHARED, fd, ps);
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if (ptr == MAP_FAILED)
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{
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if (errno != ENOSYS)
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{
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printf ("cannot mmap file: %m\n");
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result = 1;
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}
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}
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else
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{
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for (c = ps; c < ps + 1000; ++c)
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if (ptr[c - ps] != '0' + (c % 10))
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{
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printf ("wrong data mapped at offset %d\n", c);
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result = 1;
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}
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}
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/* And for mmap64. */
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ptr = mmap64 (NULL, 1000, PROT_READ, MAP_SHARED, fd, ps);
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if (ptr == MAP_FAILED)
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{
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if (errno != ENOSYS)
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{
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printf ("cannot mmap file: %m\n");
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result = 1;
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}
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}
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else
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{
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for (c = ps; c < ps + 1000; ++c)
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if (ptr[c - ps] != '0' + (c % 10))
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{
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printf ("wrong data mapped at offset %d\n", c);
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result = 1;
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}
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}
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/* That's it. */
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return result;
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}
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@ -56,16 +56,16 @@ ENTRY (__mmap64)
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L(do_syscall):
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int $0x80
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/* If 0 > %eax > -4096 there was an error. */
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cmpl $-4096, %eax
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ja SYSCALL_ERROR_LABEL
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/* Restore registers. */
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popl %edi
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popl %esi
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popl %ebx
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popl %ebp
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/* If 0 > %eax > -4096 there was an error. */
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cmpl $-4096, %eax
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ja SYSCALL_ERROR_LABEL
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/* Successful; return the syscall's value. */
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L(pseudo_end):
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ret
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