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display_debug_macinfo

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The existing code went to the bother of using strnlen for scanning but
went wild when printing, and possibly incremented curr past end.

	* dwarf.c (display_debug_macinfo): Print strings that might not
	be zero terminated with %*s.  Don't bump curr if unterminated.
This commit is contained in:
Alan Modra
2021-05-15 15:01:51 +09:30
parent 35b2c89ec8
commit c03df92247
2 changed files with 20 additions and 9 deletions
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24
binutils/dwarf.c
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@ -5780,17 +5780,21 @@ display_debug_macinfo (struct dwarf_section *section,
case DW_MACINFO_define:
READ_ULEB (lineno, curr, end);
string = curr;
curr += strnlen ((char *) string, end - string) + 1;
printf (_(" DW_MACINFO_define - lineno : %d macro : %s\n"),
lineno, string);
curr += strnlen ((char *) string, end - string);
printf (_(" DW_MACINFO_define - lineno : %d macro : %*s\n"),
lineno, (int) (curr - string), string);
if (curr < end)
curr++;
break;
case DW_MACINFO_undef:
READ_ULEB (lineno, curr, end);
string = curr;
curr += strnlen ((char *) string, end - string) + 1;
printf (_(" DW_MACINFO_undef - lineno : %d macro : %s\n"),
lineno, string);
curr += strnlen ((char *) string, end - string);
printf (_(" DW_MACINFO_undef - lineno : %d macro : %*s\n"),
lineno, (int) (curr - string), string);
if (curr < end)
curr++;
break;
case DW_MACINFO_vendor_ext:
@ -5799,9 +5803,11 @@ display_debug_macinfo (struct dwarf_section *section,
READ_ULEB (constant, curr, end);
string = curr;
curr += strnlen ((char *) string, end - string) + 1;
printf (_(" DW_MACINFO_vendor_ext - constant : %d string : %s\n"),
constant, string);
curr += strnlen ((char *) string, end - string);
printf (_(" DW_MACINFO_vendor_ext - constant : %d string : %*s\n"),
constant, (int) (curr - string), string);
if (curr < end)
curr++;
}
break;
}