59 lines
1.9 KiB
C
59 lines
1.9 KiB
C
|
// Copyright 2019 The Marl Authors.
|
||
|
|
//
|
||
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
// you may not use this file except in compliance with the License.
|
||
|
|
// You may obtain a copy of the License at
|
||
|
|
//
|
||
|
|
// https://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
//
|
||
|
|
// Unless required by applicable law or agreed to in writing, software
|
||
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
// See the License for the specific language governing permissions and
|
||
|
|
// limitations under the License.
|
||
|
|
|
||
|
|
#if defined(__aarch64__)
|
||
|
|
|
||
|
|
#include <stddef.h>
|
||
|
|
|
||
|
|
#include "osfiber_asm_aarch64.h"
|
||
|
|
|
||
|
|
#include "marl/export.h"
|
||
|
|
|
||
|
|
MARL_EXPORT
|
||
|
|
void marl_fiber_trampoline(void (*target)(void*), void* arg) {
|
||
|
|
target(arg);
|
||
|
|
}
|
||
|
|
|
||
|
|
// __attribute__((weak)) doesn't work on MacOS.
|
||
|
|
#if defined(linux) || defined(__linux) || defined(__linux__)
|
||
|
|
// This is needed for HWSAan runtimes that don't have this commit:
|
||
|
|
// https://reviews.llvm.org/D149228.
|
||
|
|
__attribute__((weak)) void __hwasan_tag_memory(const volatile void *p,
|
||
|
|
unsigned char tag, size_t size);
|
||
|
|
__attribute((weak)) void *__hwasan_tag_pointer(const volatile void *p,
|
||
|
|
unsigned char tag);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
MARL_EXPORT
|
||
|
|
void marl_fiber_set_target(struct marl_fiber_context* ctx,
|
||
|
|
void* stack,
|
||
|
|
uint32_t stack_size,
|
||
|
|
void (*target)(void*),
|
||
|
|
void* arg) {
|
||
|
|
|
||
|
|
#if defined(linux) || defined(__linux) || defined(__linux__)
|
||
|
|
if (__hwasan_tag_memory && __hwasan_tag_pointer) {
|
||
|
|
stack = __hwasan_tag_pointer(stack, 0);
|
||
|
|
__hwasan_tag_memory(stack, 0, stack_size);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
uintptr_t* stack_top = (uintptr_t*)((uint8_t*)(stack) + stack_size);
|
||
|
|
ctx->LR = (uintptr_t)&marl_fiber_trampoline;
|
||
|
|
ctx->r0 = (uintptr_t)target;
|
||
|
|
ctx->r1 = (uintptr_t)arg;
|
||
|
|
ctx->SP = ((uintptr_t)stack_top) & ~(uintptr_t)15;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif // defined(__aarch64__)
|