THIS FILE IS MACHINE GENERATED WITH CGEN.
- the resultant file is machine generated, cgen-dis.in isn't
-Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
+Copyright 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
This file is part of the GNU Binutils and GDB, the GNU debugger.
{
const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
disassemble_info *info = (disassemble_info *) dis_info;
- const unsigned char *syn;
+ const CGEN_SYNTAX_CHAR_TYPE *syn;
CGEN_INIT_PRINT (cd);
ex_info->valid = (1 << buflen) - 1;
ex_info->insn_bytes = buf;
- switch (buflen)
- {
- case 1:
- *insn_value = buf[0];
- break;
- case 2:
- *insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb16 (buf) : bfd_getl16 (buf);
- break;
- case 4:
- *insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb32 (buf) : bfd_getl32 (buf);
- break;
- default:
- abort ();
- }
-
+ *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);
return 0;
}
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. */
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 */
/* 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
machine insn and extracts the fields. The second pass prints
them. */
-#if CGEN_INT_INSN_P
- /* Make sure the entire insn is loaded into insn_value. */
- if (CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize)
+ /* Make sure the entire insn is loaded into insn_value, if it
+ can fit. */
+ if (CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize &&
+ (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
{
unsigned long full_insn_value;
int rc = read_insn (cd, pc, info, buf,
(cd, insn, &ex_info, full_insn_value, &fields, pc);
}
else
-#endif
+ length = CGEN_EXTRACT_FN (cd, insn)
+ (cd, insn, &ex_info, insn_value_cropped, &fields, pc);
- length = CGEN_EXTRACT_FN (cd, insn)
- (cd, insn, &ex_info, insn_value, &fields, pc);
/* length < 0 -> error */
if (length < 0)
return length;
disassemble_info *info;
{
char buf[CGEN_MAX_INSN_SIZE];
+ int buflen;
int status;
- /* Read the base part of the insn. */
+ /* Attempt to read the base part of the insn. */
+ buflen = cd->base_insn_bitsize / 8;
+ status = (*info->read_memory_func) (pc, buf, buflen, info);
+
+ /* Try again with the minimum part, if min < base. */
+ if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize))
+ {
+ buflen = cd->min_insn_bitsize / 8;
+ status = (*info->read_memory_func) (pc, buf, buflen, info);
+ }
- status = (*info->read_memory_func) (pc, buf, cd->base_insn_bitsize / 8, info);
if (status != 0)
{
(*info->memory_error_func) (status, pc, info);
return -1;
}
- return print_insn (cd, pc, info, buf, cd->base_insn_bitsize / 8);
+ return print_insn (cd, pc, info, buf, buflen);
}
/* Main entry point.
arch = info->arch;
if (arch == bfd_arch_unknown)
arch = CGEN_BFD_ARCH;
-
- /* There's no standard way to compute the isa number (e.g. for arm thumb)
+
+ /* There's no standard way to compute the machine or isa number
so we leave it to the target. */
+#ifdef CGEN_COMPUTE_MACH
+ mach = CGEN_COMPUTE_MACH (info);
+#else
+ mach = info->mach;
+#endif
+
#ifdef CGEN_COMPUTE_ISA
isa = CGEN_COMPUTE_ISA (info);
#else
isa = 0;
#endif
- mach = info->mach;
-
/* If we've switched cpu's, close the current table and open a new one. */
if (cd
&& (isa != prev_isa
projects / deliverable / binutils-gdb.git / blobdiff