[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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[cb0e6de] | 31 | extern void __leave_monitor_desc( struct monitor_desc * this ); |
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[82ff5845] | 32 | extern void disable_interrupts(); |
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| 33 | extern void enable_interrupts(); |
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[78b3f52] | 34 | |
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[b58a5772] | 35 | void CtxInvokeCoroutine( |
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[80d9e49] | 36 | void (*main)(void *), |
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[c3acb841] | 37 | struct coroutine_desc *(*get_coroutine)(void *), |
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[80d9e49] | 38 | void *this |
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| 39 | ) { |
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[c84e80a] | 40 | // LIB_DEBUG_PRINTF("Invoke Coroutine : Received %p (main %p, get_c %p)\n", this, main, get_coroutine); |
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[80d9e49] | 41 | |
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[c3acb841] | 42 | struct coroutine_desc* cor = get_coroutine( this ); |
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[80d9e49] | 43 | |
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| 44 | if(cor->state == Primed) { |
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[0c92c9f] | 45 | __suspend_internal(); |
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[80d9e49] | 46 | } |
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[78b3f52] | 47 | |
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| 48 | cor->state = Active; |
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| 49 | |
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[80d9e49] | 50 | main( this ); |
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[8118303] | 51 | |
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[ee897e4b] | 52 | cor->state = Halted; |
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[8f49a54] | 53 | |
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[8118303] | 54 | //Final suspend, should never return |
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[0c92c9f] | 55 | __suspend_internal(); |
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| 56 | abortf("Resumed dead coroutine"); |
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[8118303] | 57 | } |
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| 58 | |
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| 59 | void CtxInvokeThread( |
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[9f1695b] | 60 | void (*dtor)(void *), |
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[8118303] | 61 | void (*main)(void *), |
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[348006f] | 62 | struct thread_desc *(*get_thread)(void *), |
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[8118303] | 63 | void *this |
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| 64 | ) { |
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[0c92c9f] | 65 | __suspend_internal(); |
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[8118303] | 66 | |
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[348006f] | 67 | struct thread_desc* thrd = get_thread( this ); |
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[17af7d1] | 68 | struct coroutine_desc* cor = &thrd->cor; |
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[cb0e6de] | 69 | struct monitor_desc* mon = &thrd->mon; |
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[8118303] | 70 | cor->state = Active; |
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[82ff5845] | 71 | enable_interrupts(); |
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[8118303] | 72 | |
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[c84e80a] | 73 | // LIB_DEBUG_PRINTF("Invoke Thread : invoking main %p (args %p)\n", main, this); |
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[8118303] | 74 | main( this ); |
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| 75 | |
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[82ff5845] | 76 | disable_interrupts(); |
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[cb0e6de] | 77 | __leave_monitor_desc( mon ); |
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[c84e80a] | 78 | |
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[8118303] | 79 | //Final suspend, should never return |
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[0c92c9f] | 80 | __suspend_internal(); |
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| 81 | abortf("Resumed dead thread"); |
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[78b3f52] | 82 | } |
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| 83 | |
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[5c81105] | 84 | |
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[b58a5772] | 85 | void CtxStart( |
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[80d9e49] | 86 | void (*main)(void *), |
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[c3acb841] | 87 | struct coroutine_desc *(*get_coroutine)(void *), |
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[80d9e49] | 88 | void *this, |
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| 89 | void (*invoke)(void *) |
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| 90 | ) { |
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[c84e80a] | 91 | // 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] | 92 | |
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[80d9e49] | 93 | struct coStack_t* stack = &get_coroutine( this )->stack; |
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[78b3f52] | 94 | |
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[d9c44c3] | 95 | #if defined( __i386__ ) |
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| 96 | |
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| 97 | struct FakeStack { |
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| 98 | void *fixedRegisters[3]; // fixed registers ebx, edi, esi (popped on 1st uSwitch, values unimportant) |
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[17af7d1] | 99 | uint32_t mxcr; // SSE Status and Control bits (control bits are preserved across function calls) |
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| 100 | uint16_t fcw; // X97 FPU control word (preserved across function calls) |
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| 101 | void *rturn; // where to go on return from uSwitch |
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[d9c44c3] | 102 | void *dummyReturn; // fake return compiler would have pushed on call to uInvoke |
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[80d9e49] | 103 | void *argument[3]; // for 16-byte ABI, 16-byte alignment starts here |
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| 104 | void *padding; // padding to force 16-byte alignment, as "base" is 16-byte aligned |
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[d9c44c3] | 105 | }; |
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| 106 | |
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| 107 | ((struct machine_context_t *)stack->context)->SP = (char *)stack->base - sizeof( struct FakeStack ); |
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| 108 | ((struct machine_context_t *)stack->context)->FP = NULL; // terminate stack with NULL fp |
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| 109 | |
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| 110 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->dummyReturn = NULL; |
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[80d9e49] | 111 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->argument[0] = this; // argument to invoke |
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[d9c44c3] | 112 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->rturn = invoke; |
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[17af7d1] | 113 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->mxcr = 0x1F80; //Vol. 2A 3-520 |
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| 114 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->fcw = 0x037F; //Vol. 1 8-7 |
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[d9c44c3] | 115 | |
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| 116 | #elif defined( __x86_64__ ) |
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| 117 | |
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[78b3f52] | 118 | struct FakeStack { |
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[17af7d1] | 119 | void *fixedRegisters[5]; // fixed registers rbx, r12, r13, r14, r15 |
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| 120 | uint32_t mxcr; // SSE Status and Control bits (control bits are preserved across function calls) |
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| 121 | uint16_t fcw; // X97 FPU control word (preserved across function calls) |
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| 122 | void *rturn; // where to go on return from uSwitch |
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| 123 | void *dummyReturn; // NULL return address to provide proper alignment |
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[d9c44c3] | 124 | }; |
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[78b3f52] | 125 | |
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| 126 | ((struct machine_context_t *)stack->context)->SP = (char *)stack->base - sizeof( struct FakeStack ); |
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| 127 | ((struct machine_context_t *)stack->context)->FP = NULL; // terminate stack with NULL fp |
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| 128 | |
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| 129 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->dummyReturn = NULL; |
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[b58a5772] | 130 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->rturn = CtxInvokeStub; |
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[80d9e49] | 131 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->fixedRegisters[0] = this; |
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[5c81105] | 132 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->fixedRegisters[1] = invoke; |
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[8761006c] | 133 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->mxcr = 0x1F80; //Vol. 2A 3-520 |
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| 134 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->fcw = 0x037F; //Vol. 1 8-7 |
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[d9c44c3] | 135 | #else |
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| 136 | #error Only __i386__ and __x86_64__ is supported for threads in cfa |
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| 137 | #endif |
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[e4745d7a] | 138 | } |
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