source: src/libcfa/concurrency/invoke.c @ 7b2c2c5f

aaron-thesisarm-ehcleanup-dtorsdeferred_resndemanglerjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprnew-envno_listpersistent-indexerresolv-newwith_gc
Last change on this file since 7b2c2c5f was 7b2c2c5f, checked in by Thierry Delisle <tdelisle@…>, 5 years ago

Fixed saving and loading of control words for i386

  • Property mode set to 100644
File size: 4.9 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 = Halted;
51
52      //Final suspend, should never return
53      __suspend_internal();
54      abortf("Resumed dead coroutine");
55}
56
57void CtxInvokeThread(
58      void (*main)(void *), 
59      struct thread *(*get_thread)(void *), 
60      void *this
61) {
62      __suspend_internal();
63
64      struct thread* thrd = get_thread( this );
65      struct coroutine* cor = &thrd->c;
66      cor->state = Active;
67
68      // LIB_DEBUG_PRINTF("Invoke Thread : invoking main %p (args %p)\n", main, this);
69      main( this );
70
71      __thread_signal_termination(thrd);
72
73      //Final suspend, should never return
74      __suspend_internal();
75      abortf("Resumed dead thread");
76}
77
78
79void CtxStart(
80      void (*main)(void *), 
81      struct coroutine *(*get_coroutine)(void *), 
82      void *this, 
83      void (*invoke)(void *)
84) {
85      // LIB_DEBUG_PRINTF("StartCoroutine : Passing in %p (main %p) to invoke (%p) from start (%p)\n", this, main, invoke, CtxStart);
86
87      struct coStack_t* stack = &get_coroutine( this )->stack;
88
89#if defined( __i386__ )
90
91        struct FakeStack {
92            void *fixedRegisters[3];                    // fixed registers ebx, edi, esi (popped on 1st uSwitch, values unimportant)
93            uint32_t mxcr;                              // SSE Status and Control bits (control bits are preserved across function calls)
94            uint16_t fcw;                               // X97 FPU control word (preserved across function calls)
95            void *rturn;                                // where to go on return from uSwitch
96            void *dummyReturn;                          // fake return compiler would have pushed on call to uInvoke
97            void *argument[3];                          // for 16-byte ABI, 16-byte alignment starts here
98            void *padding;                              // padding to force 16-byte alignment, as "base" is 16-byte aligned
99        };
100
101        ((struct machine_context_t *)stack->context)->SP = (char *)stack->base - sizeof( struct FakeStack );
102        ((struct machine_context_t *)stack->context)->FP = NULL;                // terminate stack with NULL fp
103
104        ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->dummyReturn = NULL;
105        ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->argument[0] = this;     // argument to invoke
106        ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->rturn = invoke;
107
108#elif defined( __x86_64__ )
109
110      struct FakeStack {
111            void *fixedRegisters[5];                    // fixed registers rbx, r12, r13, r14, r15
112            uint32_t mxcr;                              // SSE Status and Control bits (control bits are preserved across function calls)
113            uint16_t fcw;                               // X97 FPU control word (preserved across function calls)
114            void *rturn;                                // where to go on return from uSwitch
115            void *dummyReturn;                          // NULL return address to provide proper alignment
116      };
117
118      ((struct machine_context_t *)stack->context)->SP = (char *)stack->base - sizeof( struct FakeStack );
119      ((struct machine_context_t *)stack->context)->FP = NULL;          // terminate stack with NULL fp
120
121      ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->dummyReturn = NULL;
122      ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->rturn = CtxInvokeStub;
123      ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->fixedRegisters[0] = this;
124      ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->fixedRegisters[1] = invoke;
125      ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->mxcr = 0x1F80; //Vol. 2A 3-520
126      ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->fcw = 0x037F;  //Vol. 1 8-7
127#else
128      #error Only __i386__ and __x86_64__ is supported for threads in cfa
129#endif
130}
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