[hbelusca] 74725: [FREELDR/WINLDR]: Rework LoadModule() so that we can load custom kernels & hals via the /KERNEL= and /HAL= boot option switches.
31 May
2017
31 May
'17
6:40 p.m.
Author: hbelusca
Date: Wed May 31 18:40:29 2017
New Revision: 74725
URL: http://svn.reactos.org/svn/reactos?rev=74725&view=rev
Log:
[FREELDR/WINLDR]: Rework LoadModule() so that we can load custom kernels & hals via
the /KERNEL= and /HAL= boot option switches.
Modified:
trunk/reactos/boot/freeldr/freeldr/ntldr/winldr.c
Modified: trunk/reactos/boot/freeldr/freeldr/ntldr/winldr.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/boot/freeldr/freeldr/ntldr…
==============================================================================
--- trunk/reactos/boot/freeldr/freeldr/ntldr/winldr.c [iso-8859-1] (original)
+++ trunk/reactos/boot/freeldr/freeldr/ntldr/winldr.c [iso-8859-1] Wed May 31 18:40:29
2017
@@ -96,7 +96,7 @@
/* Construct SystemRoot and ArcBoot from SystemPath */
PathSeparator = strstr(BootPath, "\\") - BootPath;
strncpy(ArcBoot, BootPath, PathSeparator);
- ArcBoot[PathSeparator] = 0;
+ ArcBoot[PathSeparator] = ANSI_NULL;
TRACE("ArcBoot: %s\n", ArcBoot);
TRACE("SystemRoot: %s\n", SystemRoot);
@@ -249,7 +249,7 @@
{
// There is no directory in the path
strcpy(DllName, DriverPath);
- DriverPath[0] = 0;
+ DriverPath[0] = ANSI_NULL;
}
TRACE("DriverPath: %s, DllName: %s, LPB\n", DriverPath, DllName);
@@ -426,13 +426,13 @@
static
BOOLEAN
LoadModule(
- PLOADER_PARAMETER_BLOCK LoaderBlock,
- PCCH Path,
- PCCH File,
- TYPE_OF_MEMORY MemoryType,
- PLDR_DATA_TABLE_ENTRY *Dte,
- BOOLEAN IsKdTransportDll,
- ULONG Percentage)
+ IN OUT PLOADER_PARAMETER_BLOCK LoaderBlock,
+ IN PCCH Path,
+ IN PCCH File,
+ IN PCCH ImportName, // BaseDllName
+ IN TYPE_OF_MEMORY MemoryType,
+ OUT PLDR_DATA_TABLE_ENTRY *Dte,
+ IN ULONG Percentage)
{
BOOLEAN Success;
CHAR FullFileName[MAX_PATH];
@@ -444,7 +444,6 @@
UiDrawProgressBarCenter(Percentage, 100, ProgressString);
strcpy(FullFileName, Path);
- strcat(FullFileName, "SYSTEM32\\");
strcat(FullFileName, File);
Success = WinLdrLoadImage(FullFileName, MemoryType, &BaseAddress);
@@ -455,15 +454,13 @@
}
TRACE("%s loaded successfully at %p\n", File, BaseAddress);
- strcpy(FullFileName, "WINDOWS\\SYSTEM32\\");
- strcat(FullFileName, File);
/*
* Cheat about the base DLL name if we are loading
* the Kernel Debugger Transport DLL, to make the
* PE loader happy.
*/
Success = WinLdrAllocateDataTableEntry(&LoaderBlock->LoadOrderListHead,
- (IsKdTransportDll ? "KDCOM.DLL" :
File),
+ ImportName,
FullFileName,
BaseAddress,
Dte);
@@ -475,22 +472,82 @@
BOOLEAN
LoadWindowsCore(IN USHORT OperatingSystemVersion,
IN OUT PLOADER_PARAMETER_BLOCK LoaderBlock,
- IN LPCSTR BootOptions,
- IN LPCSTR BootPath,
+ IN PCSTR BootOptions,
+ IN PCSTR BootPath,
IN OUT PLDR_DATA_TABLE_ENTRY* KernelDTE)
{
BOOLEAN Success;
+ PCSTR Options;
CHAR DirPath[MAX_PATH];
+ CHAR KernelFileName[MAX_PATH];
+ CHAR HalFileName[MAX_PATH];
CHAR KdTransportDllName[MAX_PATH];
PLDR_DATA_TABLE_ENTRY HalDTE, KdComDTE = NULL;
if (!KernelDTE) return FALSE;
+ /* Initialize SystemRoot\System32 path */
+ strcpy(DirPath, BootPath);
+ strcat(DirPath, "SYSTEM32\\");
+
+ //
+ // TODO: Parse also the separate INI values "Kernel=" and "Hal="
+ //
+
+ /* Default KERNEL and HAL file names */
+ strcpy(KernelFileName, "NTOSKRNL.EXE");
+ strcpy(HalFileName , "HAL.DLL");
+
+ /* Find any /KERNEL= or /HAL= switch in the boot options */
+ Options = BootOptions;
+ while (Options)
+ {
+ /* Skip possible initial whitespace */
+ Options += strspn(Options, " \t");
+
+ /* Check whether a new commutator starts and it is either KERNEL or HAL */
+ if (*Options != '/' || (++Options,
+ !(_strnicmp(Options, "KERNEL=", 7) == 0 ||
+ _strnicmp(Options, "HAL=", 4) == 0)) )
+ {
+ /* Search for another whitespace */
+ Options = strpbrk(Options, " \t");
+ continue;
+ }
+ else
+ {
+ size_t i = strcspn(Options, " \t"); /* Skip whitespace */
+ if (i == 0)
+ {
+ /* Use the default values */
+ break;
+ }
+
+ /* We have found either KERNEL or HAL commutator */
+ if (_strnicmp(Options, "KERNEL=", 7) == 0)
+ {
+ Options += 7; i -= 7;
+ strncpy(KernelFileName, Options, i);
+ KernelFileName[i] = ANSI_NULL;
+ _strupr(KernelFileName);
+ }
+ else if (_strnicmp(Options, "HAL=", 4) == 0)
+ {
+ Options += 4; i -= 4;
+ strncpy(HalFileName, Options, i);
+ HalFileName[i] = ANSI_NULL;
+ _strupr(HalFileName);
+ }
+ }
+ }
+
+ TRACE("Kernel file = '%s' ; HAL file = '%s'\n",
KernelFileName, HalFileName);
+
/* Load the Kernel */
- LoadModule(LoaderBlock, BootPath, "NTOSKRNL.EXE", LoaderSystemCode,
KernelDTE, FALSE, 30);
+ LoadModule(LoaderBlock, DirPath, KernelFileName, "NTOSKRNL.EXE",
LoaderSystemCode, KernelDTE, 30);
/* Load the HAL */
- LoadModule(LoaderBlock, BootPath, "HAL.DLL", LoaderHalCode, &HalDTE,
FALSE, 45);
+ LoadModule(LoaderBlock, DirPath, HalFileName, "HAL.DLL", LoaderHalCode,
&HalDTE, 45);
/* Load the Kernel Debugger Transport DLL */
if (OperatingSystemVersion > _WIN32_WINNT_WIN2K)
@@ -525,27 +582,28 @@
* "...foo /DEBUGPORT= bar..."
* (in that case, we default the port to COM).
*/
- while (BootOptions)
+ Options = BootOptions;
+ while (Options)
{
/* Skip possible initial whitespace */
- BootOptions += strspn(BootOptions, " \t");
+ Options += strspn(Options, " \t");
/* Check whether a new commutator starts and it is the DEBUGPORT one */
- if (*BootOptions != '/' || _strnicmp(++BootOptions,
"DEBUGPORT=", 10) != 0)
+ if (*Options != '/' || _strnicmp(++Options, "DEBUGPORT=",
10) != 0)
{
/* Search for another whitespace */
- BootOptions = strpbrk(BootOptions, " \t");
+ Options = strpbrk(Options, " \t");
continue;
}
else
{
/* We found the DEBUGPORT commutator. Move to the port name. */
- BootOptions += 10;
+ Options += 10;
break;
}
}
- if (BootOptions)
+ if (Options)
{
/*
* We have found the DEBUGPORT commutator. Parse the port name.
@@ -553,33 +611,30 @@
* If we only have /DEBUGPORT= (i.e. without any port name), defaults it to
"COM".
*/
strcpy(KdTransportDllName, "KD");
- if (_strnicmp(BootOptions, "COM", 3) == 0 && '0'
<= BootOptions[3] && BootOptions[3] <= '9')
+ if (_strnicmp(Options, "COM", 3) == 0 && '0' <=
Options[3] && Options[3] <= '9')
{
- strncat(KdTransportDllName, BootOptions, 3);
+ strncat(KdTransportDllName, Options, 3);
}
else
{
- size_t i = strcspn(BootOptions, " \t:"); /* Skip valid
separators: whitespace or colon */
+ size_t i = strcspn(Options, " \t:"); /* Skip valid separators:
whitespace or colon */
if (i == 0)
strcat(KdTransportDllName, "COM");
else
- strncat(KdTransportDllName, BootOptions, i);
+ strncat(KdTransportDllName, Options, i);
}
strcat(KdTransportDllName, ".DLL");
_strupr(KdTransportDllName);
/*
- * Load the transport DLL. Specify it to LoadModule so that it can
- * change the base DLL name of the loaded transport DLL to the default
- * "KDCOM.DLL" name, to make the PE loader happy.
+ * Load the transport DLL. Override the base DLL name of the
+ * loaded transport DLL to the default "KDCOM.DLL" name.
*/
- LoadModule(LoaderBlock, BootPath, KdTransportDllName, LoaderSystemCode,
&KdComDTE, TRUE, 60);
+ LoadModule(LoaderBlock, DirPath, KdTransportDllName, "KDCOM.DLL",
LoaderSystemCode, &KdComDTE, 60);
}
}
/* Load all referenced DLLs for Kernel, HAL and Kernel Debugger Transport DLL */
- strcpy(DirPath, BootPath);
- strcat(DirPath, "system32\\");
Success = WinLdrScanImportDescriptorTable(&LoaderBlock->LoadOrderListHead,
DirPath, *KernelDTE);
Success &=
WinLdrScanImportDescriptorTable(&LoaderBlock->LoadOrderListHead, DirPath, HalDTE);
if (KdComDTE)
@@ -691,7 +746,7 @@
/* Allocate and minimalist-initialize LPB */
AllocateAndInitLPB(&LoaderBlock);
- /* Load Hive */
+ /* Load the system hive */
UiDrawBackdrop();
UiDrawProgressBarCenter(15, 100, "Loading system hive...");
Success = WinLdrInitSystemHive(LoaderBlock, BootPath);
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