diff options
Diffstat (limited to 'gas/dwarf2dbg.c')
| -rw-r--r-- | gas/dwarf2dbg.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/gas/dwarf2dbg.c b/gas/dwarf2dbg.c index b77751d..cc36957 100644 --- a/gas/dwarf2dbg.c +++ b/gas/dwarf2dbg.c @@ -751,8 +751,14 @@ get_filenum (const char *filename, unsigned int num) unsigned int old = files_allocated; files_allocated = i + 32; - files = XRESIZEVEC (struct file_entry, files, files_allocated); + /* Catch wraparound. */ + if (files_allocated <= old) + { + as_bad (_("file number %u is too big"), i); + return 0; + } + files = XRESIZEVEC (struct file_entry, files, files_allocated); memset (files + old, 0, (i + 32 - old) * sizeof (struct file_entry)); } @@ -803,13 +809,18 @@ dwarf2_directive_filename (void) being supplied. Turn off gas generated debug info. */ debug_type = DEBUG_NONE; - if (num < (int) files_in_use && files[num].filename != 0) + if (num < (offsetT) files_in_use && files[num].filename != 0) { as_bad (_("file number %ld already allocated"), (long) num); return NULL; } + else if (num < 0) + { + as_bad (_("file number %ld is too small!"), (long) num); + return NULL; + } - get_filenum (filename, num); + get_filenum (filename, (unsigned int) num); return filename; } |