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address translation

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This commit is contained in:
AlpinDale 2025-12-09 00:38:36 +04:30
parent 1c0617146c
commit 26900f9074
1 changed files with 63 additions and 0 deletions
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63
src/core/address_space.cpp
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@ -650,8 +650,32 @@ struct AddressSpace::Impl {
const int handle = phys_addr != -1 ? (fd == -1 ? backing_fd : fd) : -1;
const off_t host_offset = phys_addr != -1 ? phys_addr : 0;
const int flag = phys_addr != -1 ? MAP_SHARED : (MAP_ANONYMOUS | MAP_PRIVATE);
#if defined(__APPLE__) && defined(ARCH_ARM64)
// On ARM64 macOS, translate PS4 virtual addresses to host addresses
void* host_addr = nullptr;
if (virtual_addr >= SYSTEM_MANAGED_MIN && virtual_addr <= SYSTEM_MANAGED_MAX) {
// System managed region
u64 offset = virtual_addr - SYSTEM_MANAGED_MIN;
host_addr = system_managed_base + offset;
} else if (virtual_addr >= SYSTEM_RESERVED_MIN && virtual_addr <= SYSTEM_RESERVED_MAX) {
// System reserved region
u64 offset = virtual_addr - SYSTEM_RESERVED_MIN;
host_addr = system_reserved_base + offset;
} else if (virtual_addr >= USER_MIN && virtual_addr <= USER_MAX) {
// User region
u64 offset = virtual_addr - USER_MIN;
host_addr = user_base + offset;
} else {
LOG_CRITICAL(Kernel_Vmm, "Invalid virtual address for mapping: {:#x}", virtual_addr);
return MAP_FAILED;
}
void* ret = mmap(host_addr, size, prot, MAP_FIXED | flag, handle, host_offset);
#else
void* ret = mmap(reinterpret_cast<void*>(virtual_addr), size, prot, MAP_FIXED | flag,
handle, host_offset);
#endif
ASSERT_MSG(ret != MAP_FAILED, "mmap failed: {}", strerror(errno));
return ret;
}
@ -671,9 +695,29 @@ struct AddressSpace::Impl {
// Free the relevant region.
m_free_regions.insert({start_address, end_address});
#if defined(__APPLE__) && defined(ARCH_ARM64)
// On ARM64 macOS, translate PS4 virtual addresses to host addresses
void* host_addr = nullptr;
if (start_address >= SYSTEM_MANAGED_MIN && start_address <= SYSTEM_MANAGED_MAX) {
u64 offset = start_address - SYSTEM_MANAGED_MIN;
host_addr = system_managed_base + offset;
} else if (start_address >= SYSTEM_RESERVED_MIN && start_address <= SYSTEM_RESERVED_MAX) {
u64 offset = start_address - SYSTEM_RESERVED_MIN;
host_addr = system_reserved_base + offset;
} else if (start_address >= USER_MIN && start_address <= USER_MAX) {
u64 offset = start_address - USER_MIN;
host_addr = user_base + offset;
} else {
LOG_CRITICAL(Kernel_Vmm, "Invalid virtual address for unmapping: {:#x}", start_address);
return;
}
void* ret = mmap(host_addr, end_address - start_address,
PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
#else
// Return the adjusted pointers.
void* ret = mmap(reinterpret_cast<void*>(start_address), end_address - start_address,
PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
#endif
ASSERT_MSG(ret != MAP_FAILED, "mmap failed: {}", strerror(errno));
}
@ -690,7 +734,26 @@ struct AddressSpace::Impl {
flags |= PROT_EXEC;
}
#endif
#if defined(__APPLE__) && defined(ARCH_ARM64)
// On ARM64 macOS, translate PS4 virtual addresses to host addresses
void* host_addr = nullptr;
if (virtual_addr >= SYSTEM_MANAGED_MIN && virtual_addr <= SYSTEM_MANAGED_MAX) {
u64 offset = virtual_addr - SYSTEM_MANAGED_MIN;
host_addr = system_managed_base + offset;
} else if (virtual_addr >= SYSTEM_RESERVED_MIN && virtual_addr <= SYSTEM_RESERVED_MAX) {
u64 offset = virtual_addr - SYSTEM_RESERVED_MIN;
host_addr = system_reserved_base + offset;
} else if (virtual_addr >= USER_MIN && virtual_addr <= USER_MAX) {
u64 offset = virtual_addr - USER_MIN;
host_addr = user_base + offset;
} else {
LOG_CRITICAL(Kernel_Vmm, "Invalid virtual address for protection: {:#x}", virtual_addr);
return;
}
int ret = mprotect(host_addr, size, flags);
#else
int ret = mprotect(reinterpret_cast<void*>(virtual_addr), size, flags);
#endif
ASSERT_MSG(ret == 0, "mprotect failed: {}", strerror(errno));
}