[PATCH] debugedit: Don't hang on DW_FORM_strx references

[contact@lsferreira.net]

Related to issue https://sourceware.org/bugzilla/show_bug.cgi?id=28728 and its duplicate https://sourceware.org/bugzilla/show_bug.cgi?id=29773 .



------- Original Message -------
On Thursday, November 10th, 2022 at 6:17 PM, Luís Ferreira <contact@lsferreira.net> wrote:


> 
> 
> Compilers that generate DWARF5 can write to .debug_info a DW_FORM_strx
> reference. The code seem to handle it but hangs on the abbreviation
> sanity check.
> 
> Signed-off-by: Luís Ferreira contact@lsferreira.net
> 
> ---
> tools/debugedit.c | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/debugedit.c b/tools/debugedit.c
> index d82ae5a..4450b34 100644
> --- a/tools/debugedit.c
> +++ b/tools/debugedit.c
> @@ -778,12 +778,17 @@ no_memory:
> || form == DW_FORM_line_strp
> || form == DW_FORM_implicit_const
> || form == DW_FORM_addrx
> + || form == DW_FORM_strx
> || form == DW_FORM_loclistx
> || form == DW_FORM_rnglistx
> || form == DW_FORM_addrx1
> || form == DW_FORM_addrx2
> || form == DW_FORM_addrx3
> - || form == DW_FORM_addrx4)))
> + || form == DW_FORM_addrx4
> + || form == DW_FORM_strx1
> + || form == DW_FORM_strx2
> + || form == DW_FORM_strx3
> + || form == DW_FORM_strx4)))
> {
> error (0, 0, "%s: Unknown DWARF DW_FORM_0x%x", dso->filename,
> 
> form);
> --
> 2.38.1