[0157ca7] | 1 | // -*- Mode: C -*- |
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[8def349] | 2 | // |
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| 3 | // Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo |
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| 4 | // |
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| 5 | // The contents of this file are covered under the licence agreement in the |
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| 6 | // file "LICENCE" distributed with Cforall. |
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| 7 | // |
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| 8 | // invoke.c -- |
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| 9 | // |
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| 10 | // Author : Thierry Delisle |
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| 11 | // Created On : Tue Jan 17 12:27:26 2016 |
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| 12 | // Last Modified By : Thierry Delisle |
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| 13 | // Last Modified On : -- |
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| 14 | // Update Count : 0 |
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| 15 | // |
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[78b3f52] | 16 | |
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| 17 | #include <stdbool.h> |
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| 18 | #include <stdlib.h> |
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| 19 | #include <stdio.h> |
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| 20 | |
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[d9c44c3] | 21 | #include "libhdr.h" |
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[78b3f52] | 22 | #include "invoke.h" |
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| 23 | |
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[5c81105] | 24 | #define __CFA_INVOKE_PRIVATE__ |
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| 25 | #include "invoke.h" |
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[78b3f52] | 26 | |
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| 27 | // magically invoke the "main" of the most derived class |
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| 28 | // Called from the kernel when starting a coroutine or task so must switch back to user mode. |
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[5c81105] | 29 | |
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[0c92c9f] | 30 | extern void __suspend_internal(void); |
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| 31 | extern void __thread_signal_termination(struct thread*); |
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[78b3f52] | 32 | |
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[b58a5772] | 33 | void CtxInvokeCoroutine( |
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[80d9e49] | 34 | void (*main)(void *), |
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| 35 | struct coroutine *(*get_coroutine)(void *), |
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| 36 | void *this |
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| 37 | ) { |
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[c84e80a] | 38 | // LIB_DEBUG_PRINTF("Invoke Coroutine : Received %p (main %p, get_c %p)\n", this, main, get_coroutine); |
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[80d9e49] | 39 | |
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| 40 | struct coroutine* cor = get_coroutine( this ); |
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| 41 | |
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| 42 | if(cor->state == Primed) { |
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[0c92c9f] | 43 | __suspend_internal(); |
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[80d9e49] | 44 | } |
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[78b3f52] | 45 | |
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| 46 | cor->state = Active; |
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| 47 | |
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[80d9e49] | 48 | main( this ); |
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[8118303] | 49 | |
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[8f49a54] | 50 | cor->state = Halt; |
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| 51 | cor->notHalted = false; |
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| 52 | |
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[8118303] | 53 | //Final suspend, should never return |
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[0c92c9f] | 54 | __suspend_internal(); |
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| 55 | abortf("Resumed dead coroutine"); |
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[8118303] | 56 | } |
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| 57 | |
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| 58 | void CtxInvokeThread( |
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| 59 | void (*main)(void *), |
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[e15df4c] | 60 | struct thread *(*get_thread)(void *), |
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[8118303] | 61 | void *this |
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| 62 | ) { |
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[0c92c9f] | 63 | __suspend_internal(); |
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[8118303] | 64 | |
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[e15df4c] | 65 | struct thread* thrd = get_thread( this ); |
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[c84e80a] | 66 | struct coroutine* cor = &thrd->c; |
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[8118303] | 67 | cor->state = Active; |
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| 68 | |
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[c84e80a] | 69 | // LIB_DEBUG_PRINTF("Invoke Thread : invoking main %p (args %p)\n", main, this); |
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[8118303] | 70 | main( this ); |
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| 71 | |
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[0c92c9f] | 72 | __thread_signal_termination(thrd); |
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[c84e80a] | 73 | |
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[8118303] | 74 | //Final suspend, should never return |
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[0c92c9f] | 75 | __suspend_internal(); |
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| 76 | abortf("Resumed dead thread"); |
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[78b3f52] | 77 | } |
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| 78 | |
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[5c81105] | 79 | |
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[b58a5772] | 80 | void CtxStart( |
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[80d9e49] | 81 | void (*main)(void *), |
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| 82 | struct coroutine *(*get_coroutine)(void *), |
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| 83 | void *this, |
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| 84 | void (*invoke)(void *) |
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| 85 | ) { |
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[c84e80a] | 86 | // LIB_DEBUG_PRINTF("StartCoroutine : Passing in %p (main %p) to invoke (%p) from start (%p)\n", this, main, invoke, CtxStart); |
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[5c81105] | 87 | |
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[80d9e49] | 88 | struct coStack_t* stack = &get_coroutine( this )->stack; |
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[78b3f52] | 89 | |
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[d9c44c3] | 90 | #if defined( __i386__ ) |
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| 91 | |
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| 92 | struct FakeStack { |
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| 93 | void *fixedRegisters[3]; // fixed registers ebx, edi, esi (popped on 1st uSwitch, values unimportant) |
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| 94 | void *rturn; // where to go on return from uSwitch |
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| 95 | void *dummyReturn; // fake return compiler would have pushed on call to uInvoke |
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[80d9e49] | 96 | void *argument[3]; // for 16-byte ABI, 16-byte alignment starts here |
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| 97 | void *padding; // padding to force 16-byte alignment, as "base" is 16-byte aligned |
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[d9c44c3] | 98 | }; |
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| 99 | |
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| 100 | ((struct machine_context_t *)stack->context)->SP = (char *)stack->base - sizeof( struct FakeStack ); |
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| 101 | ((struct machine_context_t *)stack->context)->FP = NULL; // terminate stack with NULL fp |
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| 102 | |
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| 103 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->dummyReturn = NULL; |
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[80d9e49] | 104 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->argument[0] = this; // argument to invoke |
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[d9c44c3] | 105 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->rturn = invoke; |
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| 106 | |
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| 107 | #elif defined( __x86_64__ ) |
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| 108 | |
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[78b3f52] | 109 | struct FakeStack { |
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| 110 | void *fixedRegisters[5]; // fixed registers rbx, r12, r13, r14, r15 |
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[ffc3b26] | 111 | uint32_t mxcr; // SSE Status and Control bits (control bits are preserved across function calls) |
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| 112 | uint16_t fcw; // X97 FPU control word (preserved across function calls) |
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| 113 | void *rturn; // where to go on return from uSwitch |
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[78b3f52] | 114 | void *dummyReturn; // NULL return address to provide proper alignment |
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[d9c44c3] | 115 | }; |
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[78b3f52] | 116 | |
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| 117 | ((struct machine_context_t *)stack->context)->SP = (char *)stack->base - sizeof( struct FakeStack ); |
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| 118 | ((struct machine_context_t *)stack->context)->FP = NULL; // terminate stack with NULL fp |
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| 119 | |
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| 120 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->dummyReturn = NULL; |
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[b58a5772] | 121 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->rturn = CtxInvokeStub; |
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[80d9e49] | 122 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->fixedRegisters[0] = this; |
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[5c81105] | 123 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->fixedRegisters[1] = invoke; |
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[8761006c] | 124 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->mxcr = 0x1F80; //Vol. 2A 3-520 |
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| 125 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->fcw = 0x037F; //Vol. 1 8-7 |
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[d9c44c3] | 126 | #else |
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| 127 | #error Only __i386__ and __x86_64__ is supported for threads in cfa |
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| 128 | #endif |
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[e4745d7a] | 129 | } |
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