[78b3f52] | 1 | |
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| 2 | #include <stdbool.h> |
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| 3 | #include <stdlib.h> |
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| 4 | #include <stdio.h> |
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| 5 | |
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[d9c44c3] | 6 | #include "libhdr.h" |
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[78b3f52] | 7 | #include "invoke.h" |
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| 8 | |
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| 9 | struct machine_context_t { |
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| 10 | void *SP; |
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| 11 | void *FP; |
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| 12 | void *PC; |
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| 13 | }; |
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| 14 | |
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| 15 | extern void coInvokeStub( void ); |
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| 16 | |
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| 17 | // magically invoke the "main" of the most derived class |
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| 18 | // Called from the kernel when starting a coroutine or task so must switch back to user mode. |
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| 19 | void __invokeCoroutine__F_P9scoVtablePv__1(struct coVtable *vtable, void* vthis) |
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| 20 | { |
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[d9c44c3] | 21 | LIB_DEBUG_PRINTF("Invoke : Received %p (v %p)\n", vthis, vtable); |
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[78b3f52] | 22 | |
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| 23 | struct coroutine* cor = vtable->this_coroutine(vthis); |
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| 24 | |
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| 25 | cor->state = Active; |
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| 26 | |
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| 27 | vtable->main(vthis); |
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| 28 | } |
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| 29 | |
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| 30 | void __startCoroutine__A0_1_0___this_coroutine__PFP10scoroutine_Pd0___co_main__PF_Pd0___vtable__PFP9scoVtable_Pd0__F_Pd0PF_P9scoVtablePv___1( |
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[e4745d7a] | 31 | struct coroutine *(*this_coroutine)(void * ), |
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| 32 | void (*co_main)(void *), |
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| 33 | struct coVtable *(*get_vtable)(void *), |
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| 34 | void *vthis, |
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[78b3f52] | 35 | void (*invoke)(struct coVtable *, void *) |
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| 36 | ) { |
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[d9c44c3] | 37 | LIB_DEBUG_PRINTF("StartCoroutine : Passing in %p (v %p) to %p\n", vthis, vtable, invoke); |
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[78b3f52] | 38 | |
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| 39 | struct coVtable * vtable = get_vtable( vthis ); |
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| 40 | struct coroutine* this = this_coroutine( vthis ); |
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| 41 | struct coStack_t* stack = &this->stack; |
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| 42 | |
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[d9c44c3] | 43 | #if defined( __i386__ ) |
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| 44 | |
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| 45 | struct FakeStack { |
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| 46 | void *fixedRegisters[3]; // fixed registers ebx, edi, esi (popped on 1st uSwitch, values unimportant) |
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| 47 | void *rturn; // where to go on return from uSwitch |
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| 48 | void *dummyReturn; // fake return compiler would have pushed on call to uInvoke |
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| 49 | void *argument[2]; // for 16-byte ABI, 16-byte alignment starts here |
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| 50 | void *padding[2]; // padding to force 16-byte alignment, as "base" is 16-byte aligned |
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| 51 | }; |
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| 52 | |
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| 53 | ((struct machine_context_t *)stack->context)->SP = (char *)stack->base - sizeof( struct FakeStack ); |
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| 54 | ((struct machine_context_t *)stack->context)->FP = NULL; // terminate stack with NULL fp |
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| 55 | |
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| 56 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->dummyReturn = NULL; |
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| 57 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->argument[0] = vtable; // argument to invoke |
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| 58 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->argument[1] = vthis; // argument to invoke |
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| 59 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->rturn = invoke; |
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| 60 | |
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| 61 | #elif defined( __x86_64__ ) |
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| 62 | |
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[78b3f52] | 63 | struct FakeStack { |
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| 64 | void *fixedRegisters[5]; // fixed registers rbx, r12, r13, r14, r15 |
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| 65 | void *rturn; // where to go on return from uSwitch |
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| 66 | void *dummyReturn; // NULL return address to provide proper alignment |
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[d9c44c3] | 67 | }; |
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[78b3f52] | 68 | |
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| 69 | ((struct machine_context_t *)stack->context)->SP = (char *)stack->base - sizeof( struct FakeStack ); |
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| 70 | ((struct machine_context_t *)stack->context)->FP = NULL; // terminate stack with NULL fp |
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| 71 | |
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| 72 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->dummyReturn = NULL; |
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| 73 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->rturn = coInvokeStub; |
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| 74 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->fixedRegisters[0] = vtable; |
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| 75 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->fixedRegisters[1] = vthis; |
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| 76 | ((struct FakeStack *)(((struct machine_context_t *)stack->context)->SP))->fixedRegisters[2] = invoke; |
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[d9c44c3] | 77 | #else |
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| 78 | #error Only __i386__ and __x86_64__ is supported for threads in cfa |
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| 79 | #endif |
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[e4745d7a] | 80 | } |
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