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libgcc: Fix eh_frame fast path in find_fde_tail

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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 e724b0480bfa5ec04f39be8c7290330b495c59de ("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.

(cherry picked from commit 49310a993308492348119f4033e4db0bda4fe46a)
This commit is contained in:
Florian Weimer 2023-06-06 11:01:07 +02:00
parent a1322d76ca
commit 7302f8a2fa
1 changed files with 1 additions and 1 deletions
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libgcc/unwind-dw2-fde-dip.c
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@ -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,