gordonturner · November 13, 2020 14:52 · Mar 7, 2016 · Mar 6, 2016 · Feb 20, 2016 · Feb 20, 2016
diff --git a/KVM OSX Guest SMC Read.md b/KVM OSX Guest SMC Read.md
@@ -1,7 +1,7 @@
 KVM OSX Guest SMC Read
 ======================
 
-- 2015-02-20: OX 10.11.1 on Apple hardware works
+- 2015-02-20: OX 10.10.5 on Apple hardware can successfully build
 - NOTE: Credit and thanks to Amit Singh
 - Reference:
 
@@ -90,7 +90,17 @@ gcc -Wall -o smc_read smc_read.c -framework IOKit
 ./smc_read
 ```
 
-- On 2015-12-09 output is a constant value
+- On 2015-12-09 output is:
+
+```
+ourhardworkbythesewordsguardedpleasedontsteal(c)AppleComputerInc
+```
+
+- Reference:
+
+http://www.osxbook.com/book/bonus/chapter7/tpmdrmmyth/
+
+https://bbs.archlinux.org/viewtopic.php?id=162768
 
 
 Error Compiling

diff --git a/KVM OSX Guest SMC Read.md b/KVM OSX Guest SMC Read.md
@@ -1,7 +1,7 @@
 KVM OSX Guest SMC Read
 ======================
 
-- 2015-02-20: OX 10.10.5 on Apple hardware works
+- 2015-02-20: OX 10.11.1 on Apple hardware works
 - NOTE: Credit and thanks to Amit Singh
 - Reference:
 

diff --git a/KVM OSX Guest SMC Read.md b/KVM OSX Guest SMC Read.md
@@ -1,4 +1,7 @@
-- 2015-12-09: OX 10.10.5 on Apple hardware works
+KVM OSX Guest SMC Read
+======================
+
+- 2015-02-20: OX 10.10.5 on Apple hardware works
 - NOTE: Credit and thanks to Amit Singh
 - Reference:
 

diff --git a/KVM OSX Guest SMC Read.md b/KVM OSX Guest SMC Read.md
@@ -1,8 +1,5 @@
-- 2016-02-20 with OX 10.11.3 works
-- OSX, running on Apple hardware
-
+- 2015-12-09: OX 10.10.5 on Apple hardware works
 - NOTE: Credit and thanks to Amit Singh
-
 - Reference:
 
 http://www.osxbook.com/book/bonus/chapter7/tpmdrmmyth/

diff --git a/KVM OSX Guest SMC Read.md b/KVM OSX Guest SMC Read.md
@@ -1,7 +1,5 @@
-
-- OSX, running on Apple hardware
 - 2016-02-20 with OX 10.11.3 works
-
+- OSX, running on Apple hardware
 
 - NOTE: Credit and thanks to Amit Singh
 

diff --git a/KVM OSX Guest SMC Read → KVM OSX Guest SMC Read.md b/KVM OSX Guest SMC Read → KVM OSX Guest SMC Read.md
diff --git a/KVM OSX Guest SMC Read b/KVM OSX Guest SMC Read
@@ -0,0 +1,112 @@
+
+- OSX, running on Apple hardware
+- 2016-02-20 with OX 10.11.3 works
+
+
+- NOTE: Credit and thanks to Amit Singh
+
+- Reference:
+
+http://www.osxbook.com/book/bonus/chapter7/tpmdrmmyth/
+
+
+Build
+-----
+
+- Create `smc_read.c` and paste in code:
+
+```
+vi smc_read.c
+```
+
+```
+/*
+ * smc_read.c: Written for Mac OS X 10.5. Compile as follows:
+ *
+ * gcc -Wall -o smc_read smc_read.c -framework IOKit
+ */
+
+#include <stdio.h>
+#include <IOKit/IOKitLib.h>
+
+typedef struct {
+    uint32_t key;
+    uint8_t  __d0[22];
+    uint32_t datasize;
+    uint8_t  __d1[10];
+    uint8_t  cmd;
+    uint32_t __d2;
+    uint8_t  data[32];
+} AppleSMCBuffer_t;
+
+int
+main(void)
+{
+    io_service_t service = IOServiceGetMatchingService(kIOMasterPortDefault,
+                               IOServiceMatching("AppleSMC"));
+    if (!service)
+        return -1;
+
+    io_connect_t port = (io_connect_t)0;
+    kern_return_t kr = IOServiceOpen(service, mach_task_self(), 0, &port);
+    IOObjectRelease(service);
+    if (kr != kIOReturnSuccess)
+        return kr;
+
+    AppleSMCBuffer_t inputStruct = { 'OSK0', {0}, 32, {0}, 5, }, outputStruct;
+    size_t outputStructCnt = sizeof(outputStruct);
+
+    kr = IOConnectCallStructMethod((mach_port_t)port, (uint32_t)2,
+             (const void*)&inputStruct, sizeof(inputStruct),
+             (void*)&outputStruct, &outputStructCnt);
+    if (kr != kIOReturnSuccess)
+        return kr;
+
+    int i = 0;
+    for (i = 0; i < 32; i++)
+        printf("%c", outputStruct.data[i]);
+
+    inputStruct.key = 'OSK1';
+    kr = IOConnectCallStructMethod((mach_port_t)port, (uint32_t)2,
+             (const void*)&inputStruct, sizeof(inputStruct),
+             (void*)&outputStruct, &outputStructCnt);
+    if (kr == kIOReturnSuccess)
+        for (i = 0; i < 32; i++)
+            printf("%c", outputStruct.data[i]);
+
+    printf("\n");
+
+    return IOServiceClose(port);
+}
+```
+
+- Compile:
+
+```
+gcc -Wall -o smc_read smc_read.c -framework IOKit
+```
+
+- Run:
+
+```
+./smc_read
+```
+
+- On 2015-12-09 output is a constant value
+
+
+Error Compiling
+---------------
+
+- Error message:
+
+```
+2015-12-09 19:47:32.799 xcodebuild[9169:2013175] [MT] PluginLoading: Required plug-in compatibility UUID 7265231C-39B4-402C-89E1-16167C4CC990 for plug-in at path '~/Library/Application Support/Developer/Shared/Xcode/Plug-ins/OFPlugin.xcplugin' not present in DVTPlugInCompatibilityUUIDs
+```
+
+- Confirm that Xcode command line tools are installed:
+
+```
+xcode-select --install
+```
+