[FREELDR]

Convert most of the trap and blue screen code from asm to C, use KTRAP_FRAME and KSPECIAL_REGISTERS on the stack, instead of using a bunch of global variables. Convert multiply used asm code chunks into macros. Use intel syntax for remaining asm.
135 lines of C + 178 lines of asm, instead of 942 lines of asm

svn path=/trunk/; revision=49573

reactos/boot/freeldr/freeldr/arch/i386/i386bug.c

@@ -0,0 +1,135 @@
+
+#include <freeldr.h>
+
+#define NDEBUG
+#include <debug.h>
+
+typedef struct _FRAME
+{
+    struct _FRAME *Next;
+    void *Address;
+} FRAME;
+
+char *i386ExceptionDescriptionText[] =
+{
+    "Exception 00: DIVIDE BY ZERO\n\n",
+	"Exception 01: DEBUG EXCEPTION\n\n",
+	"Exception 02: NON-MASKABLE INTERRUPT EXCEPTION\n\n",
+	"Exception 03: BREAKPOINT (INT 3)\n\n",
+	"Exception 04: OVERFLOW\n\n",
+	"Exception 05: BOUND EXCEPTION\n\n",
+	"Exception 06: INVALID OPCODE\n\n",
+	"Exception 07: FPU NOT AVAILABLE\n\n",
+	"Exception 08: DOUBLE FAULT\n\n",
+	"Exception 09: COPROCESSOR SEGMENT OVERRUN\n\n",
+	"Exception 0A: INVALID TSS\n\n",
+	"Exception 0B: SEGMENT NOT PRESENT\n\n",
+	"Exception 0C: STACK EXCEPTION\n\n",
+	"Exception 0D: GENERAL PROTECTION FAULT\n\n",
+	"Exception 0E: PAGE FAULT\n\n",
+	"Exception 0F: Reserved\n\n",
+	"Exception 10: COPROCESSOR ERROR\n\n",
+	"Exception 11: ALIGNMENT CHECK\n\n",
+	"Exception 12: MACHINE CHECK\n\n"
+};
+
+#define SCREEN_ATTR 0x1f
+void
+i386PrintChar(char chr, ULONG x, ULONG y)
+{
+	MachVideoPutChar(chr, SCREEN_ATTR, x, y);
+}
+
+/* Used to store the current X and Y position on the screen */
+ULONG i386_ScreenPosX = 0;
+ULONG i386_ScreenPosY = 0;
+
+void
+i386PrintText(char *pszText)
+{
+    char chr;
+    while (1)
+    {
+        chr = *pszText++;
+        
+        if (chr == 0) break;
+        if (chr == '\n')
+        {
+            i386_ScreenPosY++;
+            i386_ScreenPosX = 0;
+            continue;
+        }
+        
+        MachVideoPutChar(chr, SCREEN_ATTR, i386_ScreenPosX, i386_ScreenPosY);
+        i386_ScreenPosX++;
+    }
+}
+
+void
+PrintText(const char *format, ...)
+{
+    va_list argptr;
+    char buffer[256];
+    
+    va_start(argptr, format);
+    _vsnprintf(buffer, sizeof(buffer), format, argptr);
+    buffer[sizeof(buffer) - 1] = 0;
+    va_end(argptr);
+    i386PrintText(buffer);
+}
+
+void
+i386PrintFrames(PKTRAP_FRAME TrapFrame)
+{
+    FRAME *Frame;
+
+    PrintText("Frames:\n");
+
+    for (Frame = (FRAME*)TrapFrame->Ebp;
+         Frame != 0 && (ULONG_PTR)Frame < STACK32ADDR;
+         Frame = Frame->Next)
+    {
+        PrintText("%p  ", Frame->Address);
+    }
+}
+
+void
+NTAPI
+i386PrintExceptionText(ULONG TrapIndex, PKTRAP_FRAME TrapFrame, PKSPECIAL_REGISTERS Special)
+{
+	MachVideoClearScreen(SCREEN_ATTR);
+	i386_ScreenPosX = 0;
+	i386_ScreenPosY = 0;
+
+    PrintText("An error occured in FreeLoader\n"
+              VERSION"\n"
+	          "Report this error to the ReactOS Development mailing list <ros-dev@reactos.org>\n\n"
+              "%s\n", i386ExceptionDescriptionText[TrapIndex]);
+
+    PrintText("EAX: %.8lx        ESP: %.8lx        CR0: %.8lx        DR0: %.8lx\n", 
+              TrapFrame->Eax, TrapFrame->HardwareEsp, Special->Cr0, TrapFrame->Dr0);
+    PrintText("EBX: %.8lx        EBP: %.8lx        CR1: ????????        DR1: %.8lx\n", 
+              TrapFrame->Ebx, TrapFrame->Ebp, TrapFrame->Dr1);
+    PrintText("ECX: %.8lx        ESI: %.8lx        CR2: %.8lx        DR2: %.8lx\n", 
+              TrapFrame->Ecx, TrapFrame->Esi, Special->Cr2, TrapFrame->Dr2);
+    PrintText("EDX: %.8lx        EDI: %.8lx        CR3: %.8lx        DR3: %.8lx\n", 
+              TrapFrame->Edx, TrapFrame->Edi, Special->Cr3, TrapFrame->Dr3);
+    PrintText("                                                               DR6: %.8lx\n", 
+              TrapFrame->Dr6);
+    PrintText("                                                               DR7: %.8lx\n\n", 
+              TrapFrame->Dr7);
+    PrintText("CS: %.4lx        EIP: %.8lx\n", 
+              TrapFrame->SegCs, TrapFrame->Eip);
+    PrintText("DS: %.4lx        ERROR CODE: %.8lx\n", 
+              TrapFrame->SegDs, TrapFrame->Eip);
+    PrintText("ES: %.4lx        EFLAGS: %.8lx\n", 
+              TrapFrame->SegEs, TrapFrame->EFlags);
+    PrintText("FS: %.4lx        GDTR Base: %.8lx Limit: %.4x\n", 
+              TrapFrame->SegFs, Special->Gdtr.Base, Special->Gdtr.Limit);
+    PrintText("GS: %.4lx        IDTR Base: %.8lx Limit: %.4x\n", 
+              TrapFrame->SegGs, Special->Idtr.Base, Special->Idtr.Limit);
+    PrintText("SS: %.4lx        LDTR: %.4lx TR: %.4lx\n\n", 
+              TrapFrame->HardwareSegSs, Special->Ldtr, Special->Idtr.Limit);
+
+	i386PrintFrames(TrapFrame);						// Display frames
+}

reactos/boot/freeldr/freeldr/freeldr_arch.rbuild

@@ -21,6 +21,7 @@
 				<file>hwacpi.c</file>
 				<file>hwapm.c</file>
 				<file>hwpci.c</file>
+				<file>i386bug.c</file>
 				<file>i386disk.c</file>
 				<file>i386rtl.c</file>
 				<file>i386vid.c</file>