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| author | Nick Clifton <nickc@redhat.com> | 2020-11-12 11:43:20 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2020-11-12 11:43:20 +0000 |
| commit | bcb78b47614ed252226da1a688558a17d8a99ce8 (patch) | |
| tree | 18d3480d3cb634ae6c431ef27e1b338ccecfbe84 /gas/dwarf2dbg.c | |
| parent | ab33b15255460ac45a001c8ebf69ef73f6f1fba4 (diff) | |
| download | gdb-bcb78b47614ed252226da1a688558a17d8a99ce8.zip gdb-bcb78b47614ed252226da1a688558a17d8a99ce8.tar.gz gdb-bcb78b47614ed252226da1a688558a17d8a99ce8.tar.bz2 | |
Stop Gas from generating line info or address ranges for sections that do not contain code or are not loaded.
PR 26850
* dwarf2dbg.c (dwarf2_gen_line_info_1): Do not record lines in
sections that are not executable or not loadable.
(out_debug_line): Move warning message into dwarf2_gen_line_info_1.
* testsuite/gas/elf/dwarf2-20.s: New test.
* testsuite/gas/elf/dwarf2-20.d: New test driver.
* testsuite/gas/elf/elf.exp: Run the new test.
* testsuite/gas/elf/warn-2.s: Use the .nop directive.
Diffstat (limited to 'gas/dwarf2dbg.c')
| -rw-r--r-- | gas/dwarf2dbg.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/gas/dwarf2dbg.c b/gas/dwarf2dbg.c index 4e03c63..25ebc94 100644 --- a/gas/dwarf2dbg.c +++ b/gas/dwarf2dbg.c @@ -504,6 +504,18 @@ dwarf2_gen_line_info_1 (symbolS *label, struct dwarf2_line_info *loc) { struct line_subseg *lss; struct line_entry *e; + flagword need_flags = SEC_ALLOC | SEC_LOAD | SEC_CODE; + + /* PR 26850: Do not record LOCs in non-executable, non-allocated, + or non-loaded sections. */ + if ((now_seg->flags & need_flags) != need_flags) + { + if (! SEG_NORMAL (now_seg)) + /* FIXME: Add code to suppress multiple warnings ? */ + as_warn ("dwarf line number information for %s ignored", + segment_name (now_seg)); + return; + } e = XNEW (struct line_entry); e->next = NULL; @@ -2341,11 +2353,10 @@ out_debug_line (segT line_seg) /* For each section, emit a statement program. */ for (s = all_segs; s; s = s->next) + /* Paranoia - this check should have already have + been handled in dwarf2_gen_line_info_1(). */ if (SEG_NORMAL (s->seg)) process_entries (s->seg, s->head->head); - else - as_warn ("dwarf line number information for %s ignored", - segment_name (s->seg)); if (flag_dwarf_sections) /* We have to switch to the special .debug_line_end section @@ -2740,7 +2751,6 @@ dwarf2_init (void) flag_dwarf_cie_version = 1; } - /* Finish the dwarf2 debug sections. We emit .debug.line if there were any .file/.loc directives, or --gdwarf2 was given, and if the file has a non-empty .debug_info section and an empty .debug_line |