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These are the user uploaded subtitles that are being translated: 1 00:00:00.05 --> 00:00:01.05 - [Instructor] Let's check out the second 2 00:00:01.05 --> 00:00:03.02 dissembler we've loaded. 3 00:00:03.02 --> 00:00:07.01 We'll select GoAsm 64 4 00:00:07.01 --> 00:00:09.03 in the configuration. 5 00:00:09.03 --> 00:00:12.07 We'll select a classic console application 6 00:00:12.07 --> 00:00:19.07 and we'll call the project goatest. 7 00:00:19.07 --> 00:00:21.08 Okay. 8 00:00:21.08 --> 00:00:23.03 Easy code opens up the project 9 00:00:23.03 --> 00:00:24.09 with skeleton code, 10 00:00:24.09 --> 00:00:29.05 but we'll remove this and we'll do all the coding ourselves. 11 00:00:29.05 --> 00:00:30.09 The first thing we need to do 12 00:00:30.09 --> 00:00:37.02 is check the project properties in the tools tab. 13 00:00:37.02 --> 00:00:39.05 We can see where I've set the paths 14 00:00:39.05 --> 00:00:41.05 for the GoAsm, assembler, linker, 15 00:00:41.05 --> 00:00:45.01 and resource compiler tools. 16 00:00:45.01 --> 00:00:50.06 We'll also go into tools, settings, 17 00:00:50.06 --> 00:00:53.04 and we'll set the default configuration for new projects 18 00:00:53.04 --> 00:00:58.09 to GoAsm 64 and on the tools tab, 19 00:00:58.09 --> 00:01:04.08 we'll check the debugger path. 20 00:01:04.08 --> 00:01:14.08 And set it to X64debug.exe. 21 00:01:14.08 --> 00:01:17.09 We'll apply that and close. 22 00:01:17.09 --> 00:01:20.05 Let's now put in another simple hello world program 23 00:01:20.05 --> 00:01:23.01 this time using GoAsm. 24 00:01:23.01 --> 00:01:25.05 Again we won't worry about the coding at this stage. 25 00:01:25.05 --> 00:01:26.09 All we want to do is check 26 00:01:26.09 --> 00:01:29.08 we have a good installation of GoAsm. 27 00:01:29.08 --> 00:01:33.07 We'll start with the data section 28 00:01:33.07 --> 00:01:36.06 and define a field for the number of bytes written 29 00:01:36.06 --> 00:01:45.08 to be returned as a 64 bit value till you count dq 0. 30 00:01:45.08 --> 00:01:49.05 We'll define a hello world message string. 31 00:01:49.05 --> 00:02:03.08 Hello db hello 64 world from GoAsm. 32 00:02:03.08 --> 00:02:09.01 Now for the code section .code. 33 00:02:09.01 --> 00:02:10.03 And the default entry point 34 00:02:10.03 --> 00:02:14.04 is to start label again start. 35 00:02:14.04 --> 00:02:16.07 We can use the assemblers macro capability 36 00:02:16.07 --> 00:02:18.05 to define arguments. 37 00:02:18.05 --> 00:02:21.09 In this case, we'll set the value to minus 11, 38 00:02:21.09 --> 00:02:24.00 to invoke a request for standard windows, 39 00:02:24.00 --> 00:02:31.04 API console output handle arg minus 11, 40 00:02:31.04 --> 00:02:36.04 and we'll invoke get standard handle invoke, 41 00:02:36.04 --> 00:02:42.04 get standard handle. 42 00:02:42.04 --> 00:02:43.05 Next, we'll set up a call 43 00:02:43.05 --> 00:02:45.02 to display the message. 44 00:02:45.02 --> 00:02:48.04 We'll be invoking the windows right file function. 45 00:02:48.04 --> 00:02:50.07 And again, using the arg and invoke macros 46 00:02:50.07 --> 00:02:52.08 to set up the parameters. 47 00:02:52.08 --> 00:02:54.07 These are coded in the reverse order 48 00:02:54.07 --> 00:02:57.00 to the Wynn API documentation, 49 00:02:57.00 --> 00:02:58.00 starting with a zero 50 00:02:58.00 --> 00:03:00.02 to specify no overlap. 51 00:03:00.02 --> 00:03:02.02 The address of the return number of bytes written 52 00:03:02.02 --> 00:03:03.01 in the number of bytes 53 00:03:03.01 --> 00:03:05.01 we want to write, 54 00:03:05.01 --> 00:03:17.04 arg 0,addr wcount,27. 55 00:03:17.04 --> 00:03:20.09 Then we provide as arguments 56 00:03:20.09 --> 00:03:26.01 the address of our string address hello, 57 00:03:26.01 --> 00:03:29.09 and the 64 bit register rax 58 00:03:29.09 --> 00:03:31.09 in which we'll pass the handle that we received 59 00:03:31.09 --> 00:03:35.03 from the previous invoke core. 60 00:03:35.03 --> 00:03:39.00 We can now invoke the right to the console 61 00:03:39.00 --> 00:03:46.02 invoke right file. 62 00:03:46.02 --> 00:03:48.05 Finally, we'll use an exclusive or trig 63 00:03:48.05 --> 00:03:50.01 to clear the rax register, 64 00:03:50.01 --> 00:03:53.09 which holds the exit code for the program. 65 00:03:53.09 --> 00:04:01.04 Xor rax,rax and ret. 66 00:04:01.04 --> 00:04:09.03 Okay, let's go to build build goatest.exe. 67 00:04:09.03 --> 00:04:10.09 In the console at the bottom, 68 00:04:10.09 --> 00:04:13.03 we can see we've got no errors. 69 00:04:13.03 --> 00:04:15.08 We should also check our debugger. 70 00:04:15.08 --> 00:04:19.02 Let's go to build debug, 71 00:04:19.02 --> 00:04:23.05 goatest.exe and easy code passes us through 72 00:04:23.05 --> 00:04:25.07 to the X64debug program, 73 00:04:25.07 --> 00:04:28.01 which also provides command shell. 74 00:04:28.01 --> 00:04:30.07 I'll minimize the command shell, 75 00:04:30.07 --> 00:04:33.00 and maximize the debugger. 76 00:04:33.00 --> 00:04:33.08 Okay. 77 00:04:33.08 --> 00:04:34.08 To start debugging. 78 00:04:34.08 --> 00:04:37.01 We press the icon with the person showing, 79 00:04:37.01 --> 00:04:38.08 which runs the code through 80 00:04:38.08 --> 00:04:41.06 to our user code. 81 00:04:41.06 --> 00:04:45.01 We can see where it's address 401000. 82 00:04:45.01 --> 00:04:46.06 And we can see some preliminary 83 00:04:46.06 --> 00:04:48.07 instructions before we do a move a 84 00:04:48.07 --> 00:04:51.00 to address 401008, 85 00:04:51.00 --> 00:04:52.08 where we can see a lot of Fs 86 00:04:52.08 --> 00:04:57.04 and finishing with a five that's minus 11 in hexadecimal. 87 00:04:57.04 --> 00:04:58.09 Following that we can see a call 88 00:04:58.09 --> 00:05:01.03 to get standard handle. 89 00:05:01.03 --> 00:05:02.07 We can see here the value 90 00:05:02.07 --> 00:05:04.09 of using a simple arg and invoke, 91 00:05:04.09 --> 00:05:08.01 which saved us writing six instructions. 92 00:05:08.01 --> 00:05:12.09 Let's step through this by pressing F8, 93 00:05:12.09 --> 00:05:17.00 as we get to instruction 401012. 94 00:05:17.00 --> 00:05:21.04 We can see this RCX has now changed to negative 11. 95 00:05:21.04 --> 00:05:22.03 We don't need to spend a lot 96 00:05:22.03 --> 00:05:24.06 of time looking at the code at this stage, 97 00:05:24.06 --> 00:05:30.06 but if we step down to 401047, 98 00:05:30.06 --> 00:05:34.07 and then step over that we can check the console 99 00:05:34.07 --> 00:05:38.03 and we can see that our message has appeared. 100 00:05:38.03 --> 00:05:40.03 Okay, back in the debugger, 101 00:05:40.03 --> 00:05:44.03 we can run to the end of the program 102 00:05:44.03 --> 00:05:47.03 and close the debugger. 103 00:05:47.03 --> 00:05:50.00 Right, we've now got the easy code ID set up 104 00:05:50.00 --> 00:05:52.04 with the X64 debugger installed and running. 105 00:05:52.04 --> 00:05:55.03 Or we can choose to use either the masm 106 00:05:55.03 --> 00:05:57.06 or the GoAsm assemblers. 107 00:05:57.06 --> 00:05:59.04 We're all set for development. 108 00:05:59.04 --> 00:06:00.02 And for this course, 109 00:06:00.02 --> 00:06:03.02 we'll be focusing on the GoAsm 64 assembler. 8065