[0157ca7] | 1 | // -*- Mode: C -*- |
---|
[8def349] | 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 | // |
---|
[78b3f52] | 16 | |
---|
| 17 | #include <stdbool.h> |
---|
| 18 | #include <stdlib.h> |
---|
| 19 | #include <stdio.h> |
---|
| 20 | |
---|
[d9c44c3] | 21 | #include "libhdr.h" |
---|
[78b3f52] | 22 | #include "invoke.h" |
---|
| 23 | |
---|
[5c81105] | 24 | #define __CFA_INVOKE_PRIVATE__ |
---|
| 25 | #include "invoke.h" |
---|
[78b3f52] | 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. |
---|
[5c81105] | 29 | |
---|
[0c92c9f] | 30 | extern void __suspend_internal(void); |
---|
| 31 | extern void __thread_signal_termination(struct thread*); |
---|
[78b3f52] | 32 | |
---|
[b58a5772] | 33 | void CtxInvokeCoroutine( |
---|
[80d9e49] | 34 | void (*main)(void *), |
---|
| 35 | struct coroutine *(*get_coroutine)(void *), |
---|
| 36 | void *this |
---|
| 37 | ) { |
---|
[c84e80a] | 38 | // LIB_DEBUG_PRINTF("Invoke Coroutine : Received %p (main %p, get_c %p)\n", this, main, get_coroutine); |
---|
[80d9e49] | 39 | |
---|
| 40 | struct coroutine* cor = get_coroutine( this ); |
---|
| 41 | |
---|
| 42 | if(cor->state == Primed) { |
---|
[0c92c9f] | 43 | __suspend_internal(); |
---|
[80d9e49] | 44 | } |
---|
[78b3f52] | 45 | |
---|
| 46 | cor->state = Active; |
---|
| 47 | |
---|
[80d9e49] | 48 | main( this ); |
---|
[8118303] | 49 | |
---|
[8f49a54] | 50 | cor->state = Halt; |
---|
| 51 | cor->notHalted = false; |
---|
| 52 | |
---|
[8118303] | 53 | //Final suspend, should never return |
---|
[0c92c9f] | 54 | __suspend_internal(); |
---|
| 55 | abortf("Resumed dead coroutine"); |
---|
[8118303] | 56 | } |
---|
| 57 | |
---|
| 58 | void CtxInvokeThread( |
---|
| 59 | void (*main)(void *), |
---|
[e15df4c] | 60 | struct thread *(*get_thread)(void *), |
---|
[8118303] | 61 | void *this |
---|
| 62 | ) { |
---|
[0c92c9f] | 63 | __suspend_internal(); |
---|
[8118303] | 64 | |
---|
[e15df4c] | 65 | struct thread* thrd = get_thread( this ); |
---|
[c84e80a] | 66 | struct coroutine* cor = &thrd->c; |
---|
[8118303] | 67 | cor->state = Active; |
---|
| 68 | |
---|
[c84e80a] | 69 | // LIB_DEBUG_PRINTF("Invoke Thread : invoking main %p (args %p)\n", main, this); |
---|
[8118303] | 70 | main( this ); |
---|
| 71 | |
---|
[0c92c9f] | 72 | __thread_signal_termination(thrd); |
---|
[c84e80a] | 73 | |
---|
[8118303] | 74 | //Final suspend, should never return |
---|
[0c92c9f] | 75 | __suspend_internal(); |
---|
| 76 | abortf("Resumed dead thread"); |
---|
[78b3f52] | 77 | } |
---|
| 78 | |
---|
[5c81105] | 79 | |
---|
[b58a5772] | 80 | void CtxStart( |
---|
[80d9e49] | 81 | void (*main)(void *), |
---|
| 82 | struct coroutine *(*get_coroutine)(void *), |
---|
| 83 | void *this, |
---|
| 84 | void (*invoke)(void *) |
---|
| 85 | ) { |
---|
[c84e80a] | 86 | // LIB_DEBUG_PRINTF("StartCoroutine : Passing in %p (main %p) to invoke (%p) from start (%p)\n", this, main, invoke, CtxStart); |
---|
[5c81105] | 87 | |
---|
[80d9e49] | 88 | struct coStack_t* stack = &get_coroutine( this )->stack; |
---|
[78b3f52] | 89 | |
---|
[d9c44c3] | 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 |
---|
[80d9e49] | 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 |
---|
[d9c44c3] | 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; |
---|
[80d9e49] | 104 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->argument[0] = this; // argument to invoke |
---|
[d9c44c3] | 105 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->rturn = invoke; |
---|
| 106 | |
---|
| 107 | #elif defined( __x86_64__ ) |
---|
| 108 | |
---|
[78b3f52] | 109 | struct FakeStack { |
---|
| 110 | void *fixedRegisters[5]; // fixed registers rbx, r12, r13, r14, r15 |
---|
| 111 | void *rturn; // where to go on return from uSwitch |
---|
| 112 | void *dummyReturn; // NULL return address to provide proper alignment |
---|
[d9c44c3] | 113 | }; |
---|
[78b3f52] | 114 | |
---|
| 115 | ((struct machine_context_t *)stack->context)->SP = (char *)stack->base - sizeof( struct FakeStack ); |
---|
| 116 | ((struct machine_context_t *)stack->context)->FP = NULL; // terminate stack with NULL fp |
---|
| 117 | |
---|
| 118 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->dummyReturn = NULL; |
---|
[b58a5772] | 119 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->rturn = CtxInvokeStub; |
---|
[80d9e49] | 120 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->fixedRegisters[0] = this; |
---|
[5c81105] | 121 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->fixedRegisters[1] = invoke; |
---|
[d9c44c3] | 122 | #else |
---|
| 123 | #error Only __i386__ and __x86_64__ is supported for threads in cfa |
---|
| 124 | #endif |
---|
[e4745d7a] | 125 | } |
---|