diff options
Diffstat (limited to 'opcodes/cgen-dis.in')
| -rw-r--r-- | opcodes/cgen-dis.in | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/opcodes/cgen-dis.in b/opcodes/cgen-dis.in index 1cb8ea3..b2865f8 100644 --- a/opcodes/cgen-dis.in +++ b/opcodes/cgen-dis.in @@ -233,9 +233,15 @@ print_insn (cd, pc, info, buf, buflen) const CGEN_INSN_LIST *insn_list; CGEN_EXTRACT_INFO ex_info; - int rc = read_insn (cd, pc, info, buf, buflen, & ex_info, & insn_value); - if (rc != 0) - return rc; + /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */ + insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG); + + /* Fill in ex_info fields like read_insn would. Don't actually call + read_insn, since the incoming buffer is already read (and possibly + modified a la m32r). */ + ex_info.valid = (1 << buflen) - 1; + ex_info.dis_info = info; + ex_info.insn_bytes = buf; /* The instructions are stored in hash lists. Pick the first one and keep trying until we find the right one. */ @@ -246,6 +252,7 @@ print_insn (cd, pc, info, buf, buflen) const CGEN_INSN *insn = insn_list->insn; CGEN_FIELDS fields; int length; + unsigned long insn_value_cropped; #ifdef CGEN_VALIDATE_INSN_SUPPORTED /* not needed as insn shouldn't be in hash lists if not supported */ @@ -260,7 +267,17 @@ print_insn (cd, pc, info, buf, buflen) /* Basic bit mask must be correct. */ /* ??? May wish to allow target to defer this check until the extract handler. */ - if ((insn_value & CGEN_INSN_BASE_MASK (insn)) + + /* Base size may exceed this instruction's size. Extract the + relevant part from the buffer. */ + if ((CGEN_INSN_BITSIZE (insn) / 8) < buflen && + (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long)) + insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn), + info->endian == BFD_ENDIAN_BIG); + else + insn_value_cropped = insn_value; + + if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn)) == CGEN_INSN_BASE_VALUE (insn)) { /* Printing is handled in two passes. The first pass parses the |