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Add initial macOS support.

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squidbus 2024-07-09 02:18:34 -07:00 • committed by TheTurtle
parent 36d528743a
commit 66fa29059c
29 changed files with 523 additions and 26 deletions
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19
src/core/address_space.cpp
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@ -245,14 +245,20 @@ struct AddressSpace::Impl {
Impl() {
// Allocate virtual address placeholder for our address space.
void* hint_address = reinterpret_cast<void*>(SYSTEM_MANAGED_MIN);
#ifdef __APPLE__
constexpr int virtual_flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE;
#else
constexpr int virtual_flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE | MAP_FIXED;
#endif
virtual_size = SystemSize + UserSize;
virtual_base = reinterpret_cast<u8*>(
mmap(hint_address, virtual_size, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE | MAP_FIXED, -1, 0));
mmap(hint_address, virtual_size, PROT_READ | PROT_WRITE, virtual_flags, -1, 0));
if (virtual_base == MAP_FAILED) {
LOG_CRITICAL(Kernel_Vmm, "mmap failed: {}", strerror(errno));
throw std::bad_alloc{};
}
#ifndef __APPLE__
madvise(virtual_base, virtual_size, MADV_HUGEPAGE);
backing_fd = memfd_create("BackingDmem", 0);
@ -260,6 +266,15 @@ struct AddressSpace::Impl {
LOG_CRITICAL(Kernel_Vmm, "memfd_create failed: {}", strerror(errno));
throw std::bad_alloc{};
}
#else
const auto shm_path = fmt::format("/BackingDmem{}", getpid());
backing_fd = shm_open(shm_path.c_str(), O_RDWR | O_CREAT | O_EXCL, 0600);
if (backing_fd < 0) {
LOG_CRITICAL(Kernel_Vmm, "shm_open failed: {}", strerror(errno));
throw std::bad_alloc{};
}
shm_unlink(shm_path.c_str());
#endif
// Defined to extend the file with zeros
int ret = ftruncate(backing_fd, BackingSize);