1 // Copyright 2019 The Marl Authors.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #if defined(__aarch64__)
16
17 #include "osfiber_asm_aarch64.h"
18
19 #include "marl/export.h"
20
21 MARL_EXPORT
marl_fiber_trampoline(void (* target)(void *),void * arg)22 void marl_fiber_trampoline(void (*target)(void*), void* arg) {
23 target(arg);
24 }
25
26 MARL_EXPORT
marl_fiber_set_target(struct marl_fiber_context * ctx,void * stack,uint32_t stack_size,void (* target)(void *),void * arg)27 void marl_fiber_set_target(struct marl_fiber_context* ctx,
28 void* stack,
29 uint32_t stack_size,
30 void (*target)(void*),
31 void* arg) {
32 uintptr_t* stack_top = (uintptr_t*)((uint8_t*)(stack) + stack_size);
33 ctx->LR = (uintptr_t)&marl_fiber_trampoline;
34 ctx->r0 = (uintptr_t)target;
35 ctx->r1 = (uintptr_t)arg;
36 ctx->SP = ((uintptr_t)stack_top) & ~(uintptr_t)15;
37 }
38
39 #endif // defined(__aarch64__)
40