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-rw-r--r--Lessons/Lesson_51/README.md359
-rw-r--r--Lessons/Lesson_51/UefiLessonsPkg/HIIStringsMan/HIIStringsMan.c14
-rw-r--r--Lessons/Lesson_51/UefiLessonsPkg/HIIStringsMan/HIIStringsMan.inf19
-rw-r--r--Lessons/Lesson_51/UefiLessonsPkg/HIIStringsMan/Strings.uni30
-rw-r--r--Lessons/Lesson_51/UefiLessonsPkg/UefiLessonsPkg.dsc69
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diff --git a/Lessons/Lesson_51/Man1.png b/Lessons/Lesson_51/Man1.png
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diff --git a/Lessons/Lesson_51/README.md b/Lessons/Lesson_51/README.md
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@@ -0,0 +1,359 @@
+Every command in UEFI Shell has a help message which you can read if you supply command with a `-?` argument. For example:
+```
+Shell> reset -?
+Resets the system.
+
+RESET [-w [string]]
+RESET [-s [string]]
+RESET [-c [string]]
+
+ -s - Performs a shutdown.
+ -w - Performs a warm boot.
+ -c - Performs a cold boot.
+ string - Describes a reason for the reset.
+
+NOTES:
+ 1. This command resets the system.
+ 2. The default is to perform a cold reset unless the -w parameter is
+ specified.
+ 3. If a reset string is specified, it is passed into the Reset()
+ function, and the system records the reason for the system reset.
+```
+
+In this lesson we would investigate how we can add this help/man functionality to our application.
+
+The Shell module responsible for the man finding and parsing is `ShellManParser`:
+- https://github.com/tianocore/edk2/blob/master/ShellPkg/Application/Shell/ShellManParser.h
+- https://github.com/tianocore/edk2/blob/master/ShellPkg/Application/Shell/ShellManParser.c
+
+If you look close at the module `ProcessManFile` function you'll see that besides everything it tries to:
+- open image protocol by `gEfiHiiPackageListProtocolGuid`
+- if found, register recieved Package list with `gHiiDatabase->NewPackageList`
+- go through all possible string IDs with a help of `HiiGetString`
+- if `ManFileFindTitleSection` function returns true for some string, execute `ManFileFindSections`
+
+`ManFileFindTitleSection` basically searches for a string that has a special man formatting.
+
+You could learn more about this formatting from the UEFI Shell specification (https://uefi.org/sites/default/files/resources/UEFI_Shell_Spec_2_0.pdf)
+
+![Manual Page Syntax1](Man1.png?raw=true "Manual page1")
+![Manual Page Syntax2](Man2.png?raw=true "Manual page2")
+
+# Create an app with a minimal manual
+
+Let's create an application with a manual.
+
+Use shell script to create app from template:
+```
+./createNewApp.sh HIIStringsMan
+```
+
+Add newly created app to the UefiLessonsPkg/UefiLessonsPkg.dsc:
+```
+[Components]
+ UefiLessonsPkg/HIIStringsMan/HIIStringsMan.inf
+```
+
+As you remember `ShellManParser` searched for the manual strings in the `gEfiHiiPackageListProtocolGuid` protocol data. Therefore our manual strings we need to include directly in the image resource section UefiLessonsPkg/HIIStringsMan/HIIStringsMan.inf:
+```
+[Defines]
+ ...
+ UEFI_HII_RESOURCE_SECTION = TRUE
+
+[Sources]
+ ...
+ Strings.uni
+```
+
+Here is a minimal content for our strings file UefiLessonsPkg/HIIStringsMan/Strings.uni:
+```
+#langdef en-US "English"
+
+#string STR_HELP #language en-US ""
+".TH HIIStringsMan 0 "Simple application with a manual inside."\r\n"
+".SH NAME\r\n"
+"HIIStringsMan application.\r\n"
+```
+
+If you build our application and try to execute it, there wouldn't be any help now:
+```
+FS0:\> HIIStringsMan.efi -?
+No help could be found for command 'HIIStringsMan.efi'.
+FS0:\>
+```
+
+This is because our program don't reference string tokens and they got optimized in the build process `Build/UefiLessonsPkg/RELEASE_GCC5/X64/UefiLessonsPkg/HIIStringsMan/HIIStringsMan/DEBUG/HIIStringsManStrDefs.h`:
+```
+//
+//Unicode String ID
+//
+// #define $LANGUAGE_NAME 0x0000 // not referenced
+// #define $PRINTABLE_LANGUAGE_NAME 0x0001 // not referenced
+// #define STR_HELLO_WORLD_HELP_INFORMATION 0x0002 // not referenced
+```
+
+To fix it add this string to our `UefiLessonsPkg/HIIStringsMan/HIIStringsMan.c` file:
+```
+GLOBAL_REMOVE_IF_UNREFERENCED EFI_STRING_ID mStringHelpTokenId = STRING_TOKEN(STR_HELP);
+```
+
+You can verify after the build that now string is not optimized `Build/UefiLessonsPkg/RELEASE_GCC5/X64/UefiLessonsPkg/HIIStringsMan/HIIStringsMan/DEBUG/HIIStringsManStrDefs.h`:
+```
+//
+//Unicode String ID
+//
+// #define $LANGUAGE_NAME 0x0000 // not referenced
+// #define $PRINTABLE_LANGUAGE_NAME 0x0001 // not referenced
+#define STR_HELP 0x0002
+```
+
+If you execute our application you would get:
+```
+FS0:\> HIIStringsMan.efi -?
+HIIStringsMan application.
+```
+
+# Expand our manual
+
+Let's try to add all possible sections to our manual:
+```
+#langdef en-US "English"
+
+#string STR_HELP #language en-US ""
+".TH HIIStringsMan 0 "Simple application with a manual inside."\r\n"
+".SH NAME\r\n"
+"HIIStringsMan application.\r\n"
+".SH SYNOPSIS\r\n"
+"This is the synopsis section.\r\n"
+".SH DESCRIPTION\r\n"
+"This is the description section.\r\n"
+".SH OPTIONS\r\n"
+"This is the options section.\r\n"
+".SH RETURN VALUES\r\n"
+"This is the return values section.\r\n"
+".SH ENVIRONMENT VARIABLES\r\n"
+"This is the section for used environment variables\r\n"
+".SH FILES\r\n"
+"This is the section for files associated with the subject.\r\n"
+".SH EXAMPLES\r\n"
+"This is the section for examples and suggestions.\r\n"
+".SH ERRORS\r\n"
+"This is the section for errors reported by the command.\r\n"
+".SH STANDARDS\r\n"
+"This is the section for conformance to applicable standards.\r\n"
+".SH BUGS\r\n"
+"This is the section for errors and caveats.\r\n"
+".SH CATEGORY\r\n"
+"This is the section for categories.\r\n"
+".SH CUSTOMSECTION\r\n"
+"This is an example of a custom section.\r\n"
+```
+
+If you build and execute our app now, you would get:
+```
+FS0:\> HIIStringsMan.efi -?
+HIIStringsMan application.
+This is the synopsis section.
+This is the description section.
+This is the options section.
+This is the section for examples and suggestions.
+```
+
+As you can see not all section were printed. Let's find out why.
+
+First of all let's investigate what happens when we add `-?` to our command. If you look at the shell sources you'll see that if shell find `-?` as one of the command arguments it redirects command and all the rest arguments to the `help` command https://github.com/tianocore/edk2/blob/master/ShellPkg/Application/Shell/Shell.c:
+```
+/**
+ Reprocess the command line to direct all -? to the help command.
+ if found, will add "help" as argv[0], and move the rest later.
+ @param[in,out] CmdLine pointer to the command line to update
+**/
+EFI_STATUS
+DoHelpUpdate(
+ IN OUT CHAR16 **CmdLine
+ )
+{
+ ...
+ if (StrStr(CurrentParameter, L"-?") == CurrentParameter) {
+ CurrentParameter[0] = L' ';
+ CurrentParameter[1] = L' ';
+ NewCmdLineSize = StrSize(L"help ") + StrSize(*CmdLine);
+ NewCommandLine = AllocateZeroPool(NewCmdLineSize);
+ if (NewCommandLine == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ break;
+ }
+
+ //
+ // We know the space is sufficient since we just calculated it.
+ //
+ StrnCpyS(NewCommandLine, NewCmdLineSize/sizeof(CHAR16), L"help ", 5);
+ StrnCatS(NewCommandLine, NewCmdLineSize/sizeof(CHAR16), *CmdLine, StrLen(*CmdLine));
+ SHELL_FREE_NON_NULL(*CmdLine);
+ *CmdLine = NewCommandLine;
+ break;
+ }
+ ...
+}
+```
+
+You can verify that result would be the same if you use `help` command directly to our program:
+```
+FS0:\> help HIIStringsMan.efi
+HIIStringsMan application.
+This is the synopsis section.
+This is the description section.
+This is the options section.
+This is the section for examples and suggestions.
+```
+
+Now look at the `help` command source code https://github.com/tianocore/edk2/blob/master/ShellPkg/Library/UefiShellLevel3CommandsLib/Help.c:
+```
+SHELL_STATUS
+EFIAPI
+ShellCommandRunHelp (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+ ...
+ //
+ // Get the section name for the given command name
+ //
+ if (ShellCommandLineGetFlag(Package, L"-section")) {
+ StrnCatGrow(&SectionToGetHelpOn, NULL, ShellCommandLineGetValue(Package, L"-section"), 0);
+ } else if (ShellCommandLineGetFlag(Package, L"-usage")) {
+ StrnCatGrow(&SectionToGetHelpOn, NULL, L"NAME,SYNOPSIS", 0);
+ } else if (ShellCommandLineGetFlag(Package, L"-verbose") || ShellCommandLineGetFlag(Package, L"-v")) {
+ } else {
+ //
+ // The output of help <command> will display NAME, SYNOPSIS, OPTIONS, DESCRIPTION, and EXAMPLES sections.
+ //
+ StrnCatGrow (&SectionToGetHelpOn, NULL, L"NAME,SYNOPSIS,OPTIONS,DESCRIPTION,EXAMPLES", 0);
+ }
+ ...
+}
+```
+
+Here you can see how `help` parses its incoming arguments:
+- by default the sections NAME, SYNOPSIS, OPTIONS, DESCRIPTION, EXAMPLES are printed,
+- it is possible to print particular section with a `-section <SECTION NAME>` argument,
+- it is possible to print all sections by supplying `-verbose` or `-v` argument
+
+You can verify this in shell:
+```
+FS0:\> help HIIStringsMan.efi -v
+HIIStringsMan application.
+This is the synopsis section.
+This is the description section.
+This is the options section.
+This is the return values section.
+This is the section for used environment variables
+This is the section for files associated with the subject.
+This is the section for examples and suggestions.
+This is the section for errors reported by the command.
+This is the section for conformance to applicable standards.
+This is the section for errors and caveats.
+This is the section for categories.
+This is an example of a custom section.
+FS0:\> help HIIStringsMan.efi -section BUGS
+This is the section for errors and caveats.
+```
+The same goes for the `-?`:
+```
+FS0:\> HIIStringsMan.efi -? -section "RETURN VALUES"
+This is the return values section.
+FS0:\> HIIStringsMan.efi -? -verbose
+HIIStringsMan application.
+This is the synopsis section.
+This is the description section.
+This is the options section.
+This is the return values section.
+This is the section for used environment variables
+This is the section for files associated with the subject.
+This is the section for examples and suggestions.
+This is the section for errors reported by the command.
+This is the section for conformance to applicable standards.
+This is the section for errors and caveats.
+This is the section for categories.
+This is an example of a custom section.
+```
+
+# How the ShellManParser is called
+
+We've started this lesson with the assumption that `ShellManParser` will parse our application strings. Let's investigate how `help` program would end up using this module.
+
+
+In the end `ShellCommandRunHelp` would call `ShellPrintHelp` function https://github.com/tianocore/edk2/blob/master/ShellPkg/Library/UefiShellLevel3CommandsLib/Help.c:
+```
+SHELL_STATUS
+EFIAPI
+ShellCommandRunHelp (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+ ...
+ Status = ShellPrintHelp(CommandToGetHelpOn, SectionToGetHelpOn, FALSE);
+ ...
+}
+```
+
+This function is defined https://github.com/tianocore/edk2/blob/master/ShellPkg/Library/UefiShellLib/UefiShellLib.c. It mainly call the `GetHelpText` function from the `EFI_SHELL_PROTOCOL`:
+```
+EFI_STATUS
+EFIAPI
+ShellPrintHelp (
+ IN CONST CHAR16 *CommandToGetHelpOn,
+ IN CONST CHAR16 *SectionToGetHelpOn,
+ IN BOOLEAN PrintCommandText
+ )
+{
+ ...
+ Status = gEfiShellProtocol->GetHelpText (CommandToGetHelpOn, SectionToGetHelpOn, &OutText);
+ ...
+}
+```
+
+
+Here is a description for this function from the UEFI Shell Specification:
+```
+EFI_SHELL_PROTOCOL.GetHelpText()
+
+Summary:
+Return help information about a specific command.
+
+Prototype:
+typedef
+EFI_STATUS
+(EFIAPI *EFI_SHELL_GET_HELP_TEXT) (
+ IN CONST CHAR16 *Command,
+ IN CONST CHAR16 *Sections,
+ OUT CHAR16 **HelpText
+ );
+
+Parameters:
+Command Points to the null-terminated UEFI Shell command name.
+Sections Points to the null-terminated comma-delimited section names to return. If NULL, then all sections will be returned.
+HelpText On return, points to a callee-allocated buffer containing all specified help text.
+```
+
+Prototype for the `EFI_SHELL_PROTOCOL` structure in edk2 is in the https://github.com/tianocore/edk2/blob/master/MdePkg/Include/Protocol/Shell.h
+```
+typedef struct _EFI_SHELL_PROTOCOL {
+ ...
+ EFI_SHELL_GET_HELP_TEXT GetHelpText;
+ ...
+} EFI_SHELL_PROTOCOL;
+```
+
+And initialization for this protocol is in the https://github.com/tianocore/edk2/blob/master/ShellPkg/Application/Shell/ShellProtocol.c
+```
+EFI_SHELL_PROTOCOL mShellProtocol = {
+ ...
+ EfiShellGetHelpText,
+ ...
+}
+```
+
+This function is defined in the same file above, and if you look at its definition you'll see that it is calling function from the `ProcessManFile` module.
+
+
diff --git a/Lessons/Lesson_51/UefiLessonsPkg/HIIStringsMan/HIIStringsMan.c b/Lessons/Lesson_51/UefiLessonsPkg/HIIStringsMan/HIIStringsMan.c
new file mode 100644
index 0000000..569f2d7
--- /dev/null
+++ b/Lessons/Lesson_51/UefiLessonsPkg/HIIStringsMan/HIIStringsMan.c
@@ -0,0 +1,14 @@
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiLib.h>
+
+GLOBAL_REMOVE_IF_UNREFERENCED EFI_STRING_ID mStringHelpTokenId = STRING_TOKEN(STR_HELP);
+
+EFI_STATUS
+EFIAPI
+UefiMain (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ return EFI_SUCCESS;
+}
diff --git a/Lessons/Lesson_51/UefiLessonsPkg/HIIStringsMan/HIIStringsMan.inf b/Lessons/Lesson_51/UefiLessonsPkg/HIIStringsMan/HIIStringsMan.inf
new file mode 100644
index 0000000..bf2afd2
--- /dev/null
+++ b/Lessons/Lesson_51/UefiLessonsPkg/HIIStringsMan/HIIStringsMan.inf
@@ -0,0 +1,19 @@
+[Defines]
+ INF_VERSION = 1.25
+ BASE_NAME = HIIStringsMan
+ FILE_GUID = 55fd4de5-0f19-4a23-a001-72bef56f8966
+ MODULE_TYPE = UEFI_APPLICATION
+ VERSION_STRING = 1.0
+ ENTRY_POINT = UefiMain
+ UEFI_HII_RESOURCE_SECTION = TRUE
+
+[Sources]
+ HIIStringsMan.c
+ Strings.uni
+
+[Packages]
+ MdePkg/MdePkg.dec
+
+[LibraryClasses]
+ UefiApplicationEntryPoint
+ UefiLib
diff --git a/Lessons/Lesson_51/UefiLessonsPkg/HIIStringsMan/Strings.uni b/Lessons/Lesson_51/UefiLessonsPkg/HIIStringsMan/Strings.uni
new file mode 100644
index 0000000..b6e0635
--- /dev/null
+++ b/Lessons/Lesson_51/UefiLessonsPkg/HIIStringsMan/Strings.uni
@@ -0,0 +1,30 @@
+#langdef en-US "English"
+
+#string STR_HELP #language en-US ""
+".TH HIIStringsMan 0 "Simple application with a manual inside."\r\n"
+".SH NAME\r\n"
+"HIIStringsMan application.\r\n"
+".SH SYNOPSIS\r\n"
+"This is the synopsis section.\r\n"
+".SH DESCRIPTION\r\n"
+"This is the description section.\r\n"
+".SH OPTIONS\r\n"
+"This is the options section.\r\n"
+".SH RETURN VALUES\r\n"
+"This is the return values section.\r\n"
+".SH ENVIRONMENT VARIABLES\r\n"
+"This is the section for used environment variables\r\n"
+".SH FILES\r\n"
+"This is the section for files associated with the subject.\r\n"
+".SH EXAMPLES\r\n"
+"This is the section for examples and suggestions.\r\n"
+".SH ERRORS\r\n"
+"This is the section for errors reported by the command.\r\n"
+".SH STANDARDS\r\n"
+"This is the section for conformance to applicable standards.\r\n"
+".SH BUGS\r\n"
+"This is the section for errors and caveats.\r\n"
+".SH CATEGORY\r\n"
+"This is the section for categories.\r\n"
+".SH CUSTOMSECTION\r\n"
+"This is an example of a custom section.\r\n"
diff --git a/Lessons/Lesson_51/UefiLessonsPkg/UefiLessonsPkg.dsc b/Lessons/Lesson_51/UefiLessonsPkg/UefiLessonsPkg.dsc
new file mode 100644
index 0000000..c409dfa
--- /dev/null
+++ b/Lessons/Lesson_51/UefiLessonsPkg/UefiLessonsPkg.dsc
@@ -0,0 +1,69 @@
+[Defines]
+ DSC_SPECIFICATION = 0x0001001C
+ PLATFORM_GUID = 3db7270f-ffac-4139-90a4-0ae68f3f8167
+ PLATFORM_VERSION = 0.01
+ PLATFORM_NAME = UefiLessonsPkg
+ SKUID_IDENTIFIER = DEFAULT
+ SUPPORTED_ARCHITECTURES = X64
+ BUILD_TARGETS = RELEASE
+
+
+[LibraryClasses]
+ UefiApplicationEntryPoint|MdePkg/Library/UefiApplicationEntryPoint/UefiApplicationEntryPoint.inf
+ UefiBootServicesTableLib|MdePkg/Library/UefiBootServicesTableLib/UefiBootServicesTableLib.inf
+ DebugLib|MdePkg/Library/UefiDebugLibConOut/UefiDebugLibConOut.inf
+ BaseLib|MdePkg/Library/BaseLib/BaseLib.inf
+ #PcdLib|MdePkg/Library/BasePcdLibNull/BasePcdLibNull.inf
+ PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
+ BaseMemoryLib|MdePkg/Library/BaseMemoryLib/BaseMemoryLib.inf
+ RegisterFilterLib|MdePkg/Library/RegisterFilterLibNull/RegisterFilterLibNull.inf
+ PrintLib|MdePkg/Library/BasePrintLib/BasePrintLib.inf
+ DebugPrintErrorLevelLib|MdePkg/Library/BaseDebugPrintErrorLevelLib/BaseDebugPrintErrorLevelLib.inf
+ UefiLib|MdePkg/Library/UefiLib/UefiLib.inf
+ MemoryAllocationLib|MdePkg/Library/UefiMemoryAllocationLib/UefiMemoryAllocationLib.inf
+ DevicePathLib|MdePkg/Library/UefiDevicePathLib/UefiDevicePathLib.inf
+ UefiRuntimeServicesTableLib|MdePkg/Library/UefiRuntimeServicesTableLib/UefiRuntimeServicesTableLib.inf
+ ShellCEntryLib|ShellPkg/Library/UefiShellCEntryLib/UefiShellCEntryLib.inf
+ ShellLib|ShellPkg/Library/UefiShellLib/UefiShellLib.inf
+ FileHandleLib|MdePkg/Library/UefiFileHandleLib/UefiFileHandleLib.inf
+ HiiLib|MdeModulePkg/Library/UefiHiiLib/UefiHiiLib.inf
+ SortLib|MdeModulePkg/Library/UefiSortLib/UefiSortLib.inf
+ UefiHiiServicesLib|MdeModulePkg/Library/UefiHiiServicesLib/UefiHiiServicesLib.inf
+ UefiDriverEntryPoint|MdePkg/Library/UefiDriverEntryPoint/UefiDriverEntryPoint.inf
+ #SimpleLibrary|UefiLessonsPkg/Library/SimpleLibrary/SimpleLibrary.inf
+ #SimpleLibrary|UefiLessonsPkg/Library/SimpleLibraryWithConstructor/SimpleLibraryWithConstructor.inf
+ SimpleLibrary|UefiLessonsPkg/Library/SimpleLibraryWithConstructorAndDestructor/SimpleLibraryWithConstructorAndDestructor.inf
+
+[Components]
+ UefiLessonsPkg/SimplestApp/SimplestApp.inf
+ UefiLessonsPkg/HelloWorld/HelloWorld.inf
+ UefiLessonsPkg/ImageHandle/ImageHandle.inf
+ UefiLessonsPkg/ImageInfo/ImageInfo.inf
+ UefiLessonsPkg/MemoryInfo/MemoryInfo.inf
+ UefiLessonsPkg/SimpleShellApp/SimpleShellApp.inf
+ UefiLessonsPkg/ListVariables/ListVariables.inf
+ UefiLessonsPkg/ShowBootVariables/ShowBootVariables.inf
+ UefiLessonsPkg/InteractiveApp/InteractiveApp.inf
+ UefiLessonsPkg/PCDLesson/PCDLesson.inf
+ UefiLessonsPkg/SmbiosInfo/SmbiosInfo.inf
+ UefiLessonsPkg/ShowTables/ShowTables.inf
+ UefiLessonsPkg/AcpiInfo/AcpiInfo.inf
+ UefiLessonsPkg/SaveBGRT/SaveBGRT.inf
+ UefiLessonsPkg/ListPCI/ListPCI.inf
+ UefiLessonsPkg/SimpleDriver/SimpleDriver.inf
+ UefiLessonsPkg/PCIRomInfo/PCIRomInfo.inf
+ UefiLessonsPkg/Library/SimpleLibrary/SimpleLibrary.inf
+ UefiLessonsPkg/Library/SimpleLibraryWithConstructor/SimpleLibraryWithConstructor.inf
+ UefiLessonsPkg/SimpleLibraryUser/SimpleLibraryUser.inf
+ UefiLessonsPkg/SimpleClassProtocol/SimpleClassProtocol.inf
+ UefiLessonsPkg/SimpleClassUser/SimpleClassUser.inf
+ UefiLessonsPkg/HotKeyDriver/HotKeyDriver.inf
+ UefiLessonsPkg/ShowHII/ShowHII.inf
+ UefiLessonsPkg/HIIStringsC/HIIStringsC.inf
+ UefiLessonsPkg/HIIStringsUNI/HIIStringsUNI.inf
+ UefiLessonsPkg/HIIStringsUNIRC/HIIStringsUNIRC.inf
+ UefiLessonsPkg/HIIStringsMan/HIIStringsMan.inf
+
+[PcdsFixedAtBuild]
+ gUefiLessonsPkgTokenSpaceGuid.PcdMyVar32_2|44
+