diff options
| author | Alan Modra <amodra@gmail.com> | 2021-01-21 16:46:20 +1030 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2021-01-21 19:10:15 +1030 |
| commit | 498ff0328fed7689f7a675d8c9f0f04bed1f1522 (patch) | |
| tree | ee8cea2ec11763f9ced83643600e3d39978e04dc /gas/dwarf2dbg.c | |
| parent | c78eec4424a6322682b3a164d1691135dcf004b3 (diff) | |
| download | gdb-498ff0328fed7689f7a675d8c9f0f04bed1f1522.zip gdb-498ff0328fed7689f7a675d8c9f0f04bed1f1522.tar.gz gdb-498ff0328fed7689f7a675d8c9f0f04bed1f1522.tar.bz2 | |
PR27218, memory access violation in dwarf2dbg.c
PR 27218
* dwarf2dbg.c (dwarf2_gen_line_info): Correct setting of dwarf_level.
(dwarf2_directive_filename, dwarf2_directive_loc): Likewise, and
error for negative file numbers.
Diffstat (limited to 'gas/dwarf2dbg.c')
| -rw-r--r-- | gas/dwarf2dbg.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/gas/dwarf2dbg.c b/gas/dwarf2dbg.c index 069f631..635a31c 100644 --- a/gas/dwarf2dbg.c +++ b/gas/dwarf2dbg.c @@ -550,9 +550,10 @@ dwarf2_gen_line_info (addressT ofs, struct dwarf2_line_info *loc) /* Early out for as-yet incomplete location information. */ if (loc->line == 0) return; - if (loc->filenum == 0 && DWARF2_LINE_VERSION < 5) + if (loc->filenum == 0) { - dwarf_level = 5; + if (dwarf_level < 5) + dwarf_level = 5; if (DWARF2_LINE_VERSION < 5) return; } @@ -1046,10 +1047,11 @@ dwarf2_directive_filename (void) num = get_absolute_expression (); - if ((offsetT) num < 1 && DWARF2_LINE_VERSION < 5) + if ((offsetT) num < 1) { - dwarf_level = 5; - if (DWARF2_LINE_VERSION < 5) + if (num == 0 && dwarf_level < 5) + dwarf_level = 5; + if ((offsetT) num < 0 || DWARF2_LINE_VERSION < 5) { as_bad (_("file number less than one")); ignore_rest_of_line (); @@ -1149,18 +1151,16 @@ dwarf2_directive_loc (int dummy ATTRIBUTE_UNUSED) if (filenum < 1) { - if (filenum != 0 || DWARF2_LINE_VERSION < 5) + if (filenum == 0 && dwarf_level < 5) + dwarf_level = 5; + if (filenum < 0 || DWARF2_LINE_VERSION < 5) { - dwarf_level = 5; - if (DWARF2_LINE_VERSION < 5) - { - as_bad (_("file number less than one")); - return; - } + as_bad (_("file number less than one")); + return; } } - if (filenum >= (int) files_in_use || files[filenum].filename == NULL) + if ((valueT) filenum >= files_in_use || files[filenum].filename == NULL) { as_bad (_("unassigned file number %ld"), (long) filenum); return; |