* PROGRAMMERS: Alex Ionescu (alex@relsoft.net)
* Timo Kreuzer (timo.kreuzer@reactos.org)
*/
-
+
// Arguments for idt
#define INT_32_DPL0 HEX(08E00)
#define INT_32_DPL3 HEX(0EE00)
#else
#define LOCK
#define ACQUIRE_SPINLOCK(x, y)
-#define RELEASE_SPINLOCK(x)
+#define RELEASE_SPINLOCK(x)
#endif
//
// @remark None.
//
MACRO(idt, Handler, Bits)
- .long \Handler
- .short \Bits
+ .long VAL(Handler)
+ .short VAL(Bits)
.short KGDT_R0_CODE
ENDM
mov [esp + KTRAP_FRAME_EAX], eax
/* Does the caller want nonvolatiles only? */
- if ((Flags AND KI_NONVOLATILES_ONLY) == 0)
+ if (NOT (Flags AND KI_NONVOLATILES_ONLY))
/* Otherwise, save the volatiles as well */
mov [esp + KTRAP_FRAME_ECX], ecx
mov [esp + KTRAP_FRAME_EDX], edx
endif
/* Save segment registers? */
- if ((Flags AND KI_DONT_SAVE_SEGS) == 0)
+ if (Flags AND KI_DONT_SAVE_SEGS)
+
+ /* Initialize TrapFrame segment registers with sane values */
+ mov eax, KGDT_R3_DATA OR 3
+ mov ecx, fs
+ mov [esp + KTRAP_FRAME_DS], eax
+ mov [esp + KTRAP_FRAME_ES], eax
+ mov [esp + KTRAP_FRAME_FS], ecx
+ mov dword ptr [esp + KTRAP_FRAME_GS], 0
+
+ else
/* Check for V86 mode */
- test byte ptr [esp + KTRAP_FRAME_EFLAGS + 2], (EFLAGS_V86_MASK >> 16)
+ test byte ptr [esp + KTRAP_FRAME_EFLAGS + 2], (EFLAGS_V86_MASK / HEX(10000))
jz not_v86_trap
/* Restore V8086 segments into Protected Mode segments */
mov es, ax
/* Fast system calls have fs already fixed */
- if ((Flags AND KI_FAST_SYSTEM_CALL) == 0)
+ if (NOT (Flags AND KI_FAST_SYSTEM_CALL))
/* Otherwise fix fs now */
mov ax, KGDT_R0_PCR
mov fs, ax
endif
+#if DBG
+ /* Keep the frame chain intact */
+ mov eax, [esp + KTRAP_FRAME_EIP]
+ mov [esp + KTRAP_FRAME_DEBUGEIP], eax
+ mov [esp + KTRAP_FRAME_DEBUGEBP], ebp
+ mov ebp, esp
+#endif
+
/* Set parameter 1 (ECX) to point to the frame */
mov ecx, esp
ENDM
+MACRO(KiCallHandler, Handler)
+#if DBG
+ /* Use a call to get the return address for back traces */
+ call Handler
+#else
+ /* Use the faster jmp */
+ jmp Handler
+#endif
+ nop
+ENDM
+
MACRO(TRAP_ENTRY, Trap, Flags)
EXTERN @&Trap&Handler@4 :PROC
PUBLIC _&Trap
_&Trap:
KiEnterTrap Flags
- jmp @&Trap&Handler@4
+ KiCallHandler @&Trap&Handler@4
+ENDM
+
+#define KI_RESTORE_EAX HEX(001)
+#define KI_RESTORE_ECX_EDX HEX(002)
+#define KI_RESTORE_FS HEX(004)
+#define KI_RESTORE_SEGMENTS HEX(008)
+#define KI_RESTORE_EFLAGS HEX(010)
+#define KI_EXIT_SYSCALL HEX(020)
+#define KI_EXIT_JMP HEX(040)
+#define KI_EXIT_RET HEX(080)
+#define KI_EXIT_IRET HEX(100)
+#define KI_EDITED_FRAME HEX(200)
+#define KI_RESTORE_VOLATILES (KI_RESTORE_EAX OR KI_RESTORE_ECX_EDX)
+
+MACRO(KiTrapExitStub, Name, Flags)
+
+PUBLIC @&Name&@4
+@&Name&@4:
+
+ if (Flags AND KI_RESTORE_EFLAGS)
+
+ /* We will pop EFlags off the stack */
+ OffsetEsp = KTRAP_FRAME_EFLAGS
+
+ elseif (Flags AND KI_EXIT_IRET)
+
+ /* This is the IRET frame */
+ OffsetEsp = KTRAP_FRAME_EIP
+
+ else
+
+ OffsetEsp = 0
+
+ endif
+
+ if (Flags AND KI_EDITED_FRAME)
+
+ /* Load the requested ESP */
+ mov esp, [ecx + KTRAP_FRAME_TEMPESP]
+
+ /* Put return address on the new stack */
+ push [ecx + KTRAP_FRAME_EIP]
+
+ /* Put EFLAGS on the new stack */
+ push [ecx + KTRAP_FRAME_EFLAGS]
+
+ else
+
+ /* Point esp to an appropriate member of the frame */
+ lea esp, [ecx + OffsetEsp]
+
+ endif
+
+ /* Restore non volatiles */
+ mov ebx, [ecx + KTRAP_FRAME_EBX]
+ mov esi, [ecx + KTRAP_FRAME_ESI]
+ mov edi, [ecx + KTRAP_FRAME_EDI]
+ mov ebp, [ecx + KTRAP_FRAME_EBP]
+
+ if (Flags AND KI_RESTORE_EAX)
+
+ /* Restore eax */
+ mov eax, [ecx + KTRAP_FRAME_EAX]
+
+ endif
+
+ if (Flags AND KI_RESTORE_ECX_EDX)
+
+ /* Restore volatiles */
+ mov edx, [ecx + KTRAP_FRAME_EDX]
+ mov ecx, [ecx + KTRAP_FRAME_ECX]
+
+ elseif (Flags AND KI_EXIT_JMP)
+
+ /* Load return address into edx */
+ mov edx, [esp - OffsetEsp + KTRAP_FRAME_EIP]
+
+ elseif (Flags AND KI_EXIT_SYSCALL)
+
+ /* Set sysexit parameters */
+ mov edx, [esp - OffsetEsp + KTRAP_FRAME_EIP]
+ mov ecx, [esp - OffsetEsp + KTRAP_FRAME_ESP]
+
+ /* Keep interrupts disabled until the sti / sysexit */
+ and byte ptr [esp - OffsetEsp + KTRAP_FRAME_EFLAGS + 1], NOT (EFLAGS_INTERRUPT_MASK / HEX(100))
+
+ endif
+
+ if (Flags AND KI_RESTORE_SEGMENTS)
+
+ /* Restore segments for user mode */
+ mov ds, [esp - OffsetEsp + KTRAP_FRAME_DS]
+ mov es, [esp - OffsetEsp + KTRAP_FRAME_ES]
+ mov gs, [esp - OffsetEsp + KTRAP_FRAME_GS]
+
+ endif
+
+ if ((Flags AND KI_RESTORE_FS) OR (Flags AND KI_RESTORE_SEGMENTS))
+
+ /* Restore user mode FS */
+ mov fs, [esp - OffsetEsp + KTRAP_FRAME_FS]
+
+ endif
+
+ if (Flags AND KI_RESTORE_EFLAGS)
+
+ /* Restore EFLAGS */
+ popf
+
+ endif
+
+ if (Flags AND KI_EXIT_SYSCALL)
+
+ /* Enable interrupts and return to user mode.
+ Both must follow directly after another to be "atomic". */
+ sti
+ sysexit
+
+ elseif (Flags AND KI_EXIT_IRET)
+
+ /* Return with iret */
+ iret
+
+ elseif (Flags AND KI_EXIT_JMP)
+
+ /* Return to kernel mode with a jmp */
+ jmp edx
+
+ elseif (Flags AND KI_EXIT_RET)
+
+ /* Return to kernel mode with a ret */
+ ret
+
+ endif
+
ENDM
projects / reactos.git / blobdiff