source: src/libcfa/concurrency/invoke.c @ 8761006c

aaron-thesisarm-ehcleanup-dtorsdeferred_resndemanglerenumforall-pointer-decayjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprnew-envno_listpersistent-indexerresolv-newwith_gc
Last change on this file since 8761006c was 8761006c, checked in by Thierry Delisle <tdelisle@…>, 6 years ago

Now properly initialize FPU and SSE control words

  • Property mode set to 100644
File size: 4.6 KB
Line 
1//                              -*- Mode: C -*-
2//
3// Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
4//
5// The contents of this file are covered under the licence agreement in the
6// file "LICENCE" distributed with Cforall.
7//
8// invoke.c --
9//
10// Author           : Thierry Delisle
11// Created On       : Tue Jan 17 12:27:26 2016
12// Last Modified By : Thierry Delisle
13// Last Modified On : --
14// Update Count     : 0
15//
16
17#include <stdbool.h>
18#include <stdlib.h>
19#include <stdio.h>
20
21#include "libhdr.h"
22#include "invoke.h"
23
24#define __CFA_INVOKE_PRIVATE__
25#include "invoke.h"
26
27// magically invoke the "main" of the most derived class
28// Called from the kernel when starting a coroutine or task so must switch back to user mode.
29
30extern void __suspend_internal(void);
31extern void __thread_signal_termination(struct thread*);
32
33void CtxInvokeCoroutine(
34      void (*main)(void *), 
35      struct coroutine *(*get_coroutine)(void *), 
36      void *this
37) {
38      // LIB_DEBUG_PRINTF("Invoke Coroutine : Received %p (main %p, get_c %p)\n", this, main, get_coroutine);
39
40      struct coroutine* cor = get_coroutine( this );
41
42      if(cor->state == Primed) {
43            __suspend_internal();
44      }
45
46      cor->state = Active;
47
48      main( this );
49
50      cor->state = Halt;
51      cor->notHalted = false;
52
53      //Final suspend, should never return
54      __suspend_internal();
55      abortf("Resumed dead coroutine");
56}
57
58void CtxInvokeThread(
59      void (*main)(void *), 
60      struct thread *(*get_thread)(void *), 
61      void *this
62) {
63      __suspend_internal();
64
65      struct thread* thrd = get_thread( this );
66      struct coroutine* cor = &thrd->c;
67      cor->state = Active;
68
69      // LIB_DEBUG_PRINTF("Invoke Thread : invoking main %p (args %p)\n", main, this);
70      main( this );
71
72      __thread_signal_termination(thrd);
73
74      //Final suspend, should never return
75      __suspend_internal();
76      abortf("Resumed dead thread");
77}
78
79
80void CtxStart(
81      void (*main)(void *), 
82      struct coroutine *(*get_coroutine)(void *), 
83      void *this, 
84      void (*invoke)(void *)
85) {
86      // LIB_DEBUG_PRINTF("StartCoroutine : Passing in %p (main %p) to invoke (%p) from start (%p)\n", this, main, invoke, CtxStart);
87
88      struct coStack_t* stack = &get_coroutine( this )->stack;
89
90#if defined( __i386__ )
91
92        struct FakeStack {
93            void *fixedRegisters[3];                    // fixed registers ebx, edi, esi (popped on 1st uSwitch, values unimportant)
94            void *rturn;                                      // where to go on return from uSwitch
95            void *dummyReturn;                          // fake return compiler would have pushed on call to uInvoke
96            void *argument[3];                          // for 16-byte ABI, 16-byte alignment starts here
97            void *padding;                              // padding to force 16-byte alignment, as "base" is 16-byte aligned
98        };
99
100        ((struct machine_context_t *)stack->context)->SP = (char *)stack->base - sizeof( struct FakeStack );
101        ((struct machine_context_t *)stack->context)->FP = NULL;                // terminate stack with NULL fp
102
103        ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->dummyReturn = NULL;
104        ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->argument[0] = this;     // argument to invoke
105        ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->rturn = invoke;
106
107#elif defined( __x86_64__ )
108
109      struct FakeStack {
110            void *fixedRegisters[5];                    // fixed registers rbx, r12, r13, r14, r15
111            uint32_t mxcr;                                  // SSE Status and Control bits (control bits are preserved across function calls)
112            uint16_t fcw;                                   // X97 FPU control word (preserved across function calls)
113            void *rturn;                                      // where to go on return from uSwitch
114            void *dummyReturn;                          // NULL return address to provide proper alignment
115      };
116
117      ((struct machine_context_t *)stack->context)->SP = (char *)stack->base - sizeof( struct FakeStack );
118      ((struct machine_context_t *)stack->context)->FP = NULL;          // terminate stack with NULL fp
119
120      ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->dummyReturn = NULL;
121      ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->rturn = CtxInvokeStub;
122      ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->fixedRegisters[0] = this;
123      ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->fixedRegisters[1] = invoke;
124      ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->mxcr = 0x1F80; //Vol. 2A 3-520
125      ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->fcw = 0x037F;  //Vol. 1 8-7
126#else
127      #error Only __i386__ and __x86_64__ is supported for threads in cfa
128#endif
129}
Note: See TracBrowser for help on using the repository browser.