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opcodes: blackfin: fix decoding of 32bit addresses on 64bit systems 

The Blackfin ISA is very exact with regards to address truncation when
under/over flowing its 32bit range.  On a 32bit system, things work the
same and so addresses are decoded properly.  On a 64bit system though,
the decoded addresses may include the bits that are supposed to have
been truncated.  So force a 32bit truncation after the address has been
calculated.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2010-09-22 21:55:17 +00:00
parent 35fc57f38c
commit 7a360e83fc
2 changed files with 7 additions and 0 deletions
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4
opcodes/ChangeLog
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@ -1,3 +1,7 @@
2010-09-22 Robin Getz <robin.getz@analog.com>
* bfin-dis.c (fmtconst): Cast address to 32bits.
2010-09-22 Mike Frysinger <vapier@gentoo.org>
* bfin-dis.c (decode_REGMV_0): Rewrite valid combo checks.

3
opcodes/bfin-dis.c
View File

@ -138,6 +138,9 @@ fmtconst (const_forms_t cf, TIword x, bfd_vma pc, disassemble_info *outf)
if (constant_formats[cf].pcrel)
ea += pc;
/* truncate to 32-bits for proper symbol lookup/matching */
ea = (bu32)ea;
if (outf->symbol_at_address_func (ea, outf) || !constant_formats[cf].exact)
{
outf->print_address_func (ea, outf);