+2000-09-05 Bruce Korb <bkorb@gnu.org>
+
+ * gcc/fixinc/fixincl.c(load_file): always read header files
+ with sizes that are a multiple of the page size.
+
2000-09-05 Alexandre Oliva <aoliva@redhat.com>
* gcse.c (hash_string_1): Add prototype.
2000-09-05 Alexandre Oliva <aoliva@redhat.com>
* gcse.c (hash_string_1): Add prototype.
if (stbf.st_size == 0)
return (char*)NULL;
if (stbf.st_size == 0)
return (char*)NULL;
+ /* Make the data map size one larger than the file size for documentation
+ purposes. Truth is that there will be a following NUL character if
+ the file size is not a multiple of the page size. If it is a multiple,
+ then this adjustment sometimes fails anyway. */
data_map_size = stbf.st_size+1;
data_map_fd = open (fname, O_RDONLY);
ttl_data_size += data_map_size-1;
data_map_size = stbf.st_size+1;
data_map_fd = open (fname, O_RDONLY);
ttl_data_size += data_map_size-1;
#ifdef HAVE_MMAP_FILE
curr_data_mapped = BOOL_TRUE;
#ifdef HAVE_MMAP_FILE
curr_data_mapped = BOOL_TRUE;
- res = (char*)mmap ((void*)NULL, data_map_size, PROT_READ, MAP_PRIVATE,
- data_map_fd, 0);
+
+ /* IF the file size is a multiple of the page size,
+ THEN sometimes you will seg fault trying to access a trailing byte */
+ if ((stbf.st_size & (PAGESIZE-1)) == 0)
+ res = (char*)BAD_ADDR;
+ else
+ res = (char*)mmap ((void*)NULL, data_map_size, PROT_READ,
+ MAP_PRIVATE, data_map_fd, 0);
if (res == (char*)BAD_ADDR)
{
curr_data_mapped = BOOL_FALSE;
if (res == (char*)BAD_ADDR)
{
curr_data_mapped = BOOL_FALSE;