VirtualBox

source: vbox/trunk/src/VBox/VMM/VMMR0/TRPMR0A.asm@ 15144

Last change on this file since 15144 was 14515, checked in by vboxsync, 16 years ago

SUPDrv,SUPLib,VMM: Kicked out the dead VBOX_WITH_IDT_PATCHING code.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 3.9 KB
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1; $Id: TRPMR0A.asm 14515 2008-11-24 12:33:00Z vboxsync $
2;; @file
3; TRPM - Host Context Ring-0
4;
5
6;
7; Copyright (C) 2006-2007 Sun Microsystems, Inc.
8;
9; This file is part of VirtualBox Open Source Edition (OSE), as
10; available from http://www.virtualbox.org. This file is free software;
11; you can redistribute it and/or modify it under the terms of the GNU
12; General Public License (GPL) as published by the Free Software
13; Foundation, in version 2 as it comes in the "COPYING" file of the
14; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16;
17; Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18; Clara, CA 95054 USA or visit http://www.sun.com if you need
19; additional information or have any questions.
20;
21
22;*******************************************************************************
23;* Header Files *
24;*******************************************************************************
25%include "VBox/asmdefs.mac"
26%include "VBox/x86.mac"
27
28
29BEGINCODE
30 align 16
31
32;;
33; Calls the interrupt gate as if we received an interrupt while in Ring-0.
34;
35; @param uIP x86:[ebp+8] msc:rcx gcc:rdi The interrupt gate IP.
36; @param SelCS x86:[ebp+12] msc:dx gcc:si The interrupt gate CS.
37; @param RSP msc:r8 gcc:rdx The interrupt gate RSP. ~0 if no stack switch should take place. (only AMD64)
38;DECLASM(void) trpmR0DispatchHostInterrupt(RTR0UINTPTR uIP, RTSEL SelCS, RTR0UINTPTR RSP);
39BEGINPROC trpmR0DispatchHostInterrupt
40 push xBP
41 mov xBP, xSP
42
43%ifdef RT_ARCH_AMD64
44 mov r11, rsp ; save the RSP for the iret frame.
45 and rsp, 0fffffffffffffff0h ; align the stack. (do it unconditionally saves some jump mess)
46
47 ; switch stack?
48 %ifdef ASM_CALL64_MSC
49 cmp r8, 0ffffffffffffffffh
50 je .no_stack_switch
51 mov rsp, r8
52 %else
53 cmp rdx, 0ffffffffffffffffh
54 je .no_stack_switch
55 mov rsp, rdx
56 %endif
57.no_stack_switch:
58
59 ; create the iret frame
60 push 0 ; SS
61 push r11 ; RSP
62 pushfq ; RFLAGS
63 and dword [rsp], ~X86_EFL_IF
64 mov ax, cs
65 push rax ; CS
66 lea r10, [.return wrt rip] ; RIP
67 push r10
68
69 ; create the retf frame
70 %ifdef ASM_CALL64_MSC
71 movzx rdx, dx
72 cmp rdx, r11
73 je .dir_jump
74 push rdx
75 push rcx
76 %else
77 movzx rsi, si
78 cmp rsi, r11
79 je .dir_jump
80 push rsi
81 push rdi
82 %endif
83
84 ; dispatch it
85 db 048h
86 retf
87
88 ; dispatch it by a jmp (don't mess up the IST stack)
89.dir_jump:
90 %ifdef ASM_CALL64_MSC
91 jmp rcx
92 %else
93 jmp rdi
94 %endif
95
96%else ; 32-bit:
97 mov ecx, [ebp + 8] ; uIP
98 movzx edx, word [ebp + 12] ; SelCS
99
100 ; create the iret frame
101 pushfd ; EFLAGS
102 and dword [esp], ~X86_EFL_IF
103 push cs ; CS
104 push .return ; EIP
105
106 ; create the retf frame
107 push edx
108 push ecx
109
110 ; dispatch it!
111 retf
112%endif
113.return:
114 cli
115
116 leave
117 ret
118ENDPROC trpmR0DispatchHostInterrupt
119
120
121;;
122; Issues a software interrupt to the specified interrupt vector.
123;
124; @param uActiveVector x86:[esp+4] msc:rcx gcc:rdi The vector number.
125;
126;DECLASM(void) trpmR0DispatchHostInterruptSimple(RTUINT uActiveVector);
127BEGINPROC trpmR0DispatchHostInterruptSimple
128%ifdef RT_ARCH_X86
129 mov eax, [esp + 4]
130 jmp dword [.jmp_table + eax * 4]
131%else
132 lea r9, [.jmp_table wrt rip]
133 %ifdef ASM_CALL64_MSC
134 jmp qword [r9 + rcx * 8]
135 %else
136 jmp qword [r9 + rdi * 8]
137 %endif
138%endif
139
140.jmp_table:
141%assign i 0
142%rep 256
143RTCCPTR_DEF .int_ %+ i
144%assign i i+1
145%endrep
146
147%assign i 0
148%rep 256
149 ALIGNCODE(4)
150.int_ %+ i:
151 int i
152 ret
153%assign i i+1
154%endrep
155
156ENDPROC trpmR0DispatchHostInterruptSimple
157
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