6502/udis
1
0
Fork 0
mirror of https://github.com/jefftranter/udis.git synced 2025-04-22 13:37:00 +00:00
Code Issues Projects Releases Wiki Activity

Look for pluging in same directory as executable.

Browse Source
This commit is contained in:
Jeff Tranter 2015-06-21 16:49:25 -04:00
parent 7eee20a1d9
commit 72cadf7cf3
1 changed files with 13 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
udis.py
View File

@ -15,6 +15,7 @@
# See the License for the specific language governing permissions and
# limitations under the License.
import os
import sys
import fileinput
import argparse
@ -51,7 +52,9 @@ parser.add_argument("-i", "--invalid", help="Show invalid opcodes as ??? rather
args = parser.parse_args()
# Load CPU plugin based on command line option.
plugin = args.cpu + ".py"
# Looks for plugin in same directory as this program.
dir = os.path.dirname(os.path.realpath(__file__))
plugin = dir + os.sep + args.cpu + ".py"
try:
exec(open(plugin).read())
except FileNotFoundError:
@ -110,6 +113,8 @@ while True:
# Handle if opcode is a leadin byte
if opcode in leadInBytes:
b = f.read(1) # Get next byte of extended opcode
if len(b) == 0: # Unexpected EOF
break;
opcode = (opcode << 8) + ord(b)
leadin = True
else:
@ -152,14 +157,19 @@ while True:
# Get any operands and store in an array
for i in range(1, maxLength):
if (i < length):
# TODO: Could get EOF here
op[i] = ord(f.read(1)) # Get operand bytes
b = f.read(1)
if len(b) == 0: # Unexpected EOF
break;
op[i] = ord(b) # Get operand bytes
if args.nolist is False:
line += " {0:02X}".format(op[i])
else:
if args.nolist is False and leadin is False and i != length-1:
line += " "
if len(b) == 0: # Unexpected EOF
break;
# Handle relative addresses. Indicated by the flag pcr being set.
# Assumes the operand that needs to be PC relative is the last one.
# Note: Needs changes if more flags are added.