FreeChainXenon/gcc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

libgcc: Fix eh_frame fast path in find_fde_tail

Browse source 
The eh_frame value is only used by linear_search_fdes, not the binary
search directly in find_fde_tail, so the bug is not immediately
apparent with most programs.

Fixes commit e724b0480b ("libgcc:
Special-case BFD ld unwind table encodings in find_fde_tail").

libgcc/

	PR libgcc/109712
	* unwind-dw2-fde-dip.c (find_fde_tail): Correct fast path for
	parsing eh_frame.
This commit is contained in:
Florian Weimer 2023-06-06 11:01:07 +02:00
parent b6235dbcfc
commit 49310a9933
1 changed files with 1 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
libgcc/unwind-dw2-fde-dip.c
View file

@ -403,8 +403,8 @@ find_fde_tail (_Unwind_Ptr pc,
BFD ld generates. */
signed value __attribute__ ((mode (SI)));
memcpy (&value, p, sizeof (value));
eh_frame = p + value;
p += sizeof (value);
dbase = value; /* No adjustment because pcrel has base 0. */
}
else
p = read_encoded_value_with_base (hdr->eh_frame_ptr_enc,