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comparison VMS.c @ 14:65c8fb2821ee

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Forgot to commit after had working test -- changed stack & frame ptrs in thd params to be instead in virt procr struc -- stopped working! Saving now, then going back to way had it..
author Me
date Tue, 22 Jun 2010 11:52:41 -0700
parents d801fe740275
children 734c665500e4
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3:8f2dd6dd4ccf 4:b21e0df42f17
103 */ 103 */
104 void 104 void
105 VMS__start() 105 VMS__start()
106 { int coreIdx; 106 { int coreIdx;
107 107
108 //TODO: Save "orig" stack pointer and frame ptr -- restore in VMS__end()
108 //Create the win threads that animate the core loops 109 //Create the win threads that animate the core loops
109 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ ) 110 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
110 { 111 {
111 coreLoopThdParams[coreIdx] = (ThdParams *)malloc( sizeof(ThdParams) ); 112 coreLoopThdParams[coreIdx] = (ThdParams *)malloc( sizeof(ThdParams) );
112 coreLoopThdParams[coreIdx]->coreNum = coreIdx; 113 coreLoopThdParams[coreIdx]->coreNum = coreIdx;
143 newPr = malloc( sizeof(VirtProcr) ); 144 newPr = malloc( sizeof(VirtProcr) );
144 newPr->procrID = numProcrsCreated++; 145 newPr->procrID = numProcrsCreated++;
145 newPr->nextInstrPt = fnPtr; 146 newPr->nextInstrPt = fnPtr;
146 newPr->initialData = initialData; 147 newPr->initialData = initialData;
147 148
149 //fnPtr takes two params -- void *initData & void *animProcr
148 //alloc stack locations, make stackPtr be the highest addr minus room 150 //alloc stack locations, make stackPtr be the highest addr minus room
149 // for 2 params. Put initData at stackPtr, animatingPr just above 151 // for 2 params + return addr. Return addr (NULL) is in loc pointed to
152 // by stackPtr, initData at stackPtr + 4 bytes, animatingPr just above
150 stackLocs = malloc( 0x100000 ); //1 meg stack -- default Win thread's size 153 stackLocs = malloc( 0x100000 ); //1 meg stack -- default Win thread's size
151 stackPtr = ( (char *)stackLocs + 0x100000 - 0x8 ); 154 stackPtr = ( (char *)stackLocs + 0x100000 - 0x10 );
152 //setup __cdecl on stack -- coreloop will switch to stackPtr before jmp 155 //setup __cdecl on stack -- coreloop will switch to stackPtr before jmp
153 *( (int *)stackPtr + 1) = (int) newPr; //rightmost param -- 32bit pointer 156 *( (int *)stackPtr + 2 ) = (int) newPr; //rightmost param -- 32bit pointer
154 *( (int *)stackPtr ) = (int) initialData; //next param to left 157 *( (int *)stackPtr + 1 ) = (int) initialData; //next param to left
155 newPr->stackPtr = stackPtr; //core loop will switch to this, then 158 newPr->stackPtr = stackPtr; //core loop will switch to this, then
156 newPr->framePtr = stackPtr; //suspend loop will save new stack & frame ptr 159 newPr->framePtr = stackPtr; //suspend loop will save new stack & frame ptr
157 160
158 return newPr; 161 return newPr;
159 } 162 }
181 * there, and will get passed along, inside the request handler, to the 184 * there, and will get passed along, inside the request handler, to the
182 * next work-unit for that procr. 185 * next work-unit for that procr.
183 */ 186 */
184 void 187 void
185 VMS__suspend_processor( VirtProcr *callingPr ) 188 VMS__suspend_processor( VirtProcr *callingPr )
186 { void *jmpPt, *stackPtr, *framePtr; 189 { void *jmpPt, *stackPtrAddr, *framePtrAddr, *coreLoopStackPtr;
187 190 void *coreLoopFramePtr;
191 int coreIdx;
192
193 //The request to master will cause this suspended virt procr to get
194 // scheduled again at some future point -- to resume, core loop jumps
195 // to the resume point (below), which causes restore of saved regs and
196 // "return" from this call.
188 callingPr->nextInstrPt = &&ResumePt; 197 callingPr->nextInstrPt = &&ResumePt;
189 198
190 //return ownership of the virt procr and sched slot to Master virt pr 199 //return ownership of the virt procr and sched slot to Master virt pr
191 callingPr->schedSlot->workIsDone = TRUE; 200 callingPr->schedSlot->workIsDone = TRUE;
192 201 // coreIdx = callingPr->coreAnimatedBy;
193 jmpPt = callingPr->coreLoopStartPt; 202
194 stackPtr = &(callingPr->stackPtr); 203 // stackPtrAddr = &(callingPr->stackPtr);
195 framePtr = &(callingPr->framePtr); 204 // framePtrAddr = &(callingPr->framePtr);
196 205
197 //put all regs in the clobber list to make sure GCC has saved all 206 jmpPt = callingPr->coreLoopStartPt;
198 // so safe to jump to core loop, where they *will* get clobbered 207 coreLoopFramePtr = callingPr->coreLoopFramePtr;//need this only
208 coreLoopStackPtr = callingPr->coreLoopStackPtr;
209 // coreLoopStackPtr = coreLoopThdParams[ coreIdx ]->stackPtr;//prob dont need
210
211 //Save the virt procr's stack and frame ptrs, restore coreloop's frame
212 // ptr, then jump back to "start" of core loop
199 asm volatile("movl %%esp, %0; \ 213 asm volatile("movl %%esp, %0; \
200 movl %%ebp, %1; \ 214 movl %%ebp, %1; \
201 jmp %2 " 215 movl %3, %%eax; \
202 /* outputs */ : "=g" (stackPtr), "=g" (framePtr) 216 movl %2, %%ebp; \
203 /* inputs */ : "g" (jmpPt) 217 jmp %%eax " \
204 /* clobber */ : "memory", "%eax", "%ebx", "%ecx", "%edx", "%edi","%esi" 218 /* outputs */ : "=g" (callingPr->stackPtr), "=g" (callingPr->framePtr) \
219 /* inputs */ : "g"(coreLoopFramePtr), "g" (jmpPt) \
220 /* clobber */ : "memory", "%eax", "%ebx", "%ecx", "%edx", "%edi","%esi" \
205 ); //list everything as clobbered to force GCC to save all 221 ); //list everything as clobbered to force GCC to save all
206 // live vars that are in regs on stack before this 222 // live vars that are in regs on stack before this
207 // assembly, so that stack pointer is correct, before jmp 223 // assembly, so that stack pointer is correct, before jmp
208 224
209 ResumePt: 225 ResumePt:
227 * special virt processor whose next instr pt is the core-end label. 243 * special virt processor whose next instr pt is the core-end label.
228 */ 244 */
229 void 245 void
230 VMS__shutdown() 246 VMS__shutdown()
231 { int coreIdx; 247 { int coreIdx;
248 VirtProcr *shutDownPr;
232 249
233 //Create the win threads that animate the core loops 250 //TODO: restore the "orig" stack pointer and frame ptr saved in VMS__start
251 //create a "special" virtual processor, one for each core loop that has
252 // the "loop end" point as its "next instr" point -- when the core loop
253 // jumps to animate the virt procr, the jump lands it at its own
254 // shut-down code.
234 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ ) 255 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
235 { 256 {
236 257 shutDownPr = VMS__create_procr( NULL, NULL );
258 shutDownPr->nextInstrPt = _VMSMasterEnv->coreLoopShutDownPt;
237 } 259 }
238 } 260 }
239 261
240 262
241 263