FreeChainXenon/binutils-gdb
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PR27202, readelf -wL doesn't work on ".loc 0"

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For DWARF revision 4 and earlier, display_debug_lines_decoded
populates the file_table array with entries read from .debug_line
after the directory table.  file_table[0] contains the first entry.
DWARF rev 4 line number programs index this entry as file number one.
DWARF revision 5 changes .debug_line format quite extensively, and in
particular gives file number zero a meaning.

	PR 27202
	* dwarf.c (display_debug_lines_decoded): Correct indexing used
	for DWARF5 files.
This commit is contained in:
Alan Modra 2021-09-25 10:52:05 +09:30
parent abe8cab7cb
commit fba9460f7c
1 changed files with 8 additions and 3 deletions
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11
binutils/dwarf.c
View file

@ -5297,15 +5297,17 @@ display_debug_lines_decoded (struct dwarf_section * section,
state_machine_regs.file = uladv;
{
unsigned file = state_machine_regs.file - 1;
unsigned file = state_machine_regs.file;
unsigned dir;
if (linfo.li_version < 5)
--file;
if (file_table == NULL || n_files == 0)
printf (_("\n [Use file table entry %d]\n"), file);
/* PR 20439 */
else if (file >= n_files)
{
warn (_("file index %u > number of files %u\n"), file + 1, n_files);
warn (_("file index %u > number of files %u\n"), file, n_files);
printf (_("\n <over large file table index %u>"), file);
}
else if ((dir = file_table[file].directory_index) == 0)
@ -5414,7 +5416,10 @@ display_debug_lines_decoded (struct dwarf_section * section,
if (file_table)
{
unsigned indx = state_machine_regs.file - 1;
unsigned indx = state_machine_regs.file;
if (linfo.li_version < 5)
--indx;
/* PR 20439 */
if (indx >= n_files)
{