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comparison contextSwitch.s @ 135:0b49fd35afc1

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distributed free working -app sends a VMSSemReqst to his Master which send a request to a different Master -Master send the request directly -The request structure is freed by the sender, when the request was handled There are still problems on shutdown. The shutdownVPs are all allocated by one Master which is likly to be terminated
author Merten Sach <msach@mailbox.tu-berlin.de>
date Fri, 16 Sep 2011 20:08:28 +0200
parents 9ddbb071142d
children 99343ffe1918
comparison
equal deleted inserted replaced
3:bbdbf025a867 4:043fc655dfc8
1 .data 1 .data
2 2
3 3
4 .text 4 .text
5 5 /* VirtProcr offsets:
6 * 0x10 stackPtr
7 * 0x18 framePtr
8 * 0x20 nextInstrPt
9 * 0x30 coreLoopFramePtr
10 * 0x38 coreLoopStackPtr
11 *
12 * _VMSMasterEnv offsets:
13 * 0x38 coreLoopReturnPt
14 * 0x44 masterLock
15 */
6 //Save return label address for the coreLoop to pointer 16 //Save return label address for the coreLoop to pointer
7 //Arguments: Pointer to variable holding address 17 //Arguments: Pointer to variable holding address
8 .globl saveCoreLoopReturnAddr 18 .globl saveCoreLoopReturnAddr
9 saveCoreLoopReturnAddr: 19 saveCoreLoopReturnAddr:
10 movq $coreLoopReturn, %rcx #load label address 20 movq $coreLoopReturn, %rcx #load label address
21 movq (%rsp) , %rax #get function addr 31 movq (%rsp) , %rax #get function addr
22 jmp *%rax 32 jmp *%rax
23 33
24 //Switches form CoreLoop to VP ether a normal VP or the Master Loop 34 //Switches form CoreLoop to VP ether a normal VP or the Master Loop
25 //switch to virt procr's stack and frame ptr then jump to virt procr fn 35 //switch to virt procr's stack and frame ptr then jump to virt procr fn
26 /* VirtProcr offsets:
27 * 0x10 stackPtr
28 * 0x18 framePtr
29 * 0x20 nextInstrPt
30 * 0x30 coreLoopFramePtr
31 * 0x38 coreLoopStackPtr
32 *
33 * _VMSMasterEnv offsets:
34 * 0x48 coreLoopReturnPt
35 * 0x54 masterLock
36 */
37 .globl switchToVP 36 .globl switchToVP
38 switchToVP: 37 switchToVP:
39 #VirtProcr in %rdi 38 #VirtProcr in %rdi
40 movq %rsp , 0x38(%rdi) #save core loop stack pointer 39 movq %rsp , 0x38(%rdi) #save core loop stack pointer
41 movq %rbp , 0x30(%rdi) #save core loop frame pointer 40 movq %rbp , 0x30(%rdi) #save core loop frame pointer
46 coreLoopReturn: 45 coreLoopReturn:
47 ret 46 ret
48 47
49 48
50 //switches to core loop. saves return address 49 //switches to core loop. saves return address
51 /* VirtProcr offsets:
52 * 0x10 stackPtr
53 * 0x18 framePtr
54 * 0x20 nextInstrPt
55 * 0x30 coreLoopFramePtr
56 * 0x38 coreLoopStackPtr
57 *
58 * _VMSMasterEnv offsets:
59 * 0x48 coreLoopReturnPt
60 * 0x54 masterLock
61 */
62 .globl switchToCoreLoop 50 .globl switchToCoreLoop
63 switchToCoreLoop: 51 switchToCoreLoop:
64 #VirtProcr in %rdi 52 #VirtProcr in %rdi
65 movq $VPReturn , 0x20(%rdi) #store return address 53 movq $VPReturn , 0x20(%rdi) #store return address
66 movq %rsp , 0x10(%rdi) #save stack pointer 54 movq %rsp , 0x10(%rdi) #save stack pointer
67 movq %rbp , 0x18(%rdi) #save frame pointer 55 movq %rbp , 0x18(%rdi) #save frame pointer
68 movq 0x38(%rdi), %rsp #restore stack pointer 56 movq 0x38(%rdi), %rsp #restore stack pointer
69 movq 0x30(%rdi), %rbp #restore frame pointer 57 movq 0x30(%rdi), %rbp #restore frame pointer
70 movq $_VMSMasterEnv, %rcx 58 movq $_VMSMasterEnv, %rcx
71 movq (%rcx) , %rcx 59 movq (%rcx) , %rcx
72 movq 0x48(%rcx), %rax #get CoreLoopStartPt 60 movq 0x38(%rcx), %rax #get CoreLoopStartPt
73 jmp *%rax #jmp to CoreLoop 61 jmp *%rax #jmp to CoreLoop
74 VPReturn: 62 VPReturn:
75 ret 63 ret
76 64
77 65
78 66
79 //switches to core loop from master. saves return address 67 //switches to core loop from master. saves return address
80 //Releases masterLock so the next MasterLoop can be executed 68 //Releases masterLock so the next MasterLoop can be executed
81 /* VirtProcr offsets:
82 * 0x10 stackPtr
83 * 0x18 framePtr
84 * 0x20 nextInstrPt
85 * 0x30 coreLoopFramePtr
86 * 0x38 coreLoopStackPtr
87 *
88 * _VMSMasterEnv offsets:
89 * 0x48 coreLoopReturnPt
90 * 0x54 masterLock
91 */
92 .globl masterSwitchToCoreLoop 69 .globl masterSwitchToCoreLoop
93 masterSwitchToCoreLoop: 70 masterSwitchToCoreLoop:
94 #VirtProcr in %rdi 71 #VirtProcr in %rdi
95 movq $MasterReturn, 0x20(%rdi) #store return address 72 movq $MasterReturn, 0x20(%rdi) #store return address
96 movq %rsp , 0x10(%rdi) #save stack pointer 73 movq %rsp , 0x10(%rdi) #save stack pointer
97 movq %rbp , 0x18(%rdi) #save frame pointer 74 movq %rbp , 0x18(%rdi) #save frame pointer
98 movq 0x38(%rdi), %rsp #restore stack pointer 75 movq 0x38(%rdi), %rsp #restore stack pointer
99 movq 0x30(%rdi), %rbp #restore frame pointer 76 movq 0x30(%rdi), %rbp #restore frame pointer
100 movq $_VMSMasterEnv, %rcx 77 movq $_VMSMasterEnv, %rcx
101 movq (%rcx) , %rcx 78 movq (%rcx) , %rcx
102 movq 0x48(%rcx), %rax #get CoreLoopStartPt 79 movq 0x38(%rcx), %rax #get CoreLoopStartPt
103 movl $0x0 , 0x54(%rcx) #release lock 80 movl $0x0 , 0x44(%rcx) #release lock
104 jmp *%rax #jmp to CoreLoop 81 jmp *%rax #jmp to CoreLoop
105 MasterReturn: 82 MasterReturn:
106 ret 83 ret
107 84
108 85
110 //therefor switch to coreLoop context from master context 87 //therefor switch to coreLoop context from master context
111 // no need to call because the stack is already set up for switchVP 88 // no need to call because the stack is already set up for switchVP
112 // and virtPr is in %rdi 89 // and virtPr is in %rdi
113 // and both functions have the same argument. 90 // and both functions have the same argument.
114 // do not save register of VP because this function will never return 91 // do not save register of VP because this function will never return
115 /* VirtProcr offsets:
116 * 0x10 stackPtr
117 * 0x18 framePtr
118 * 0x20 nextInstrPt
119 * 0x30 coreLoopFramePtr
120 * 0x38 coreLoopStackPtr
121 *
122 * _VMSMasterEnv offsets:
123 * 0x48 coreLoopReturnPt
124 * 0x58 masterLock
125 */
126 .globl asmTerminateCoreLoop 92 .globl asmTerminateCoreLoop
127 asmTerminateCoreLoop: 93 asmTerminateCoreLoop:
128 #VirtProcr in %rdi 94 #VirtProcr in %rdi
129 movq 0x38(%rdi), %rsp #restore stack pointer 95 movq 0x38(%rdi), %rsp #restore stack pointer
130 movq 0x30(%rdi), %rbp #restore frame pointer 96 movq 0x30(%rdi), %rbp #restore frame pointer