46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
// Copyright 2019 The Marl Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#if defined(__x86_64__)
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#include "osfiber_asm_x64.h"
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#include "marl/export.h"
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#include "marl/sanitizers.h"
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// You can find an explanation of this code here:
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// https://github.com/google/marl/issues/199
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MARL_UNDEFINED_SANITIZER_ONLY(__attribute__((no_sanitize("function"))))
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MARL_EXPORT
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void marl_fiber_trampoline(void (*target)(void*), void* arg) {
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target(arg);
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}
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MARL_EXPORT
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void marl_fiber_set_target(struct marl_fiber_context* ctx,
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void* stack,
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uint32_t stack_size,
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void (*target)(void*),
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void* arg) {
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uintptr_t* stack_top = (uintptr_t*)((uint8_t*)(stack) + stack_size);
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ctx->RIP = (uintptr_t)&marl_fiber_trampoline;
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ctx->RDI = (uintptr_t)target;
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ctx->RSI = (uintptr_t)arg;
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ctx->RSP = (uintptr_t)&stack_top[-3];
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stack_top[-2] = 0; // No return target.
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}
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#endif // defined(__x86_64__)
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