ams: support building unit test programs on windows/linux/macos

libraries/libstratosphere/source/mem/impl/mem_impl_platform.os.linux.cpp

@@ -0,0 +1,142 @@
+/*
+ * Copyright (c) Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <stratosphere.hpp>
+#include <sys/mman.h>
+#include "mem_impl_platform.hpp"
+
+namespace ams::mem::impl {
+
+    errno_t virtual_alloc(void **ptr, size_t size) {
+        /* Ensure size is non-zero. */
+        if (size == 0) {
+            return EINVAL;
+        }
+
+        /* Allocate virtual memory. */
+        if (const auto address = ::mmap(nullptr, size, PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); address != MAP_FAILED) {
+            *ptr = reinterpret_cast<void *>(address);
+            return 0;
+        } else {
+            return errno;
+        }
+    }
+
+    errno_t virtual_free(void *ptr, size_t size) {
+        /* Ensure pointer/size aren't zero. */
+        if (ptr == nullptr || size == 0) {
+            return EINVAL;
+        }
+
+        /* Free the memory. */
+        if (::munmap(ptr, size) == 0) {
+            return 0;
+        } else {
+            return errno;
+        }
+    }
+
+    errno_t physical_alloc(void *ptr, size_t size, Prot prot) {
+        /* Ensure pointer isn't zero. */
+        if (ptr == nullptr) {
+            return EINVAL;
+        }
+
+        /* Convert the protection. */
+        int native_prot;
+        switch (util::ToUnderlying(prot)) {
+            case Prot_none:
+                native_prot = PROT_NONE;
+                break;
+            case Prot_read:
+                native_prot = PROT_READ;
+                break;
+            case Prot_write:
+            case Prot_write | Prot_read:
+                native_prot = PROT_READ | PROT_WRITE;
+                break;
+            case Prot_exec:
+                native_prot = PROT_EXEC;
+                break;
+            case Prot_exec | Prot_read:
+                native_prot = PROT_READ | PROT_EXEC;
+                break;
+            case Prot_exec | Prot_write:
+            case Prot_exec | Prot_write | Prot_read:
+                native_prot = PROT_READ | PROT_WRITE | PROT_EXEC;
+                break;
+            default:
+                return EINVAL;
+        }
+
+        if (::mprotect(ptr, size, native_prot)) {
+            return 0;
+        } else {
+            return errno;
+        }
+    }
+
+    errno_t physical_free(void *ptr, size_t size) {
+        /* Detect empty allocation. */
+        const uintptr_t aligned_start = util::AlignUp(reinterpret_cast<uintptr_t>(ptr),          os::MemoryPageSize);
+        const uintptr_t aligned_end   = util::AlignDown(reinterpret_cast<uintptr_t>(ptr) + size, os::MemoryPageSize);
+        const size_t    aligned_size  = aligned_end - aligned_start;
+        if (aligned_end <= aligned_start) {
+            return 0;
+        }
+
+        if (::mprotect(reinterpret_cast<void *>(aligned_start), aligned_size, PROT_NONE)) {
+            return 0;
+        } else {
+            return errno;
+        }
+    }
+
+    size_t strlcpy(char *dst, const char *src, size_t size) {
+        const size_t src_size = std::strlen(src);
+        if (src_size >= size) {
+            if (size) {
+                std::memcpy(dst, src, size - 1);
+                dst[size - 1] = 0;
+            }
+        } else {
+            std::memcpy(dst, src, src_size + 1);
+        }
+        return src_size;
+    }
+
+    errno_t gen_random(void *dst, size_t dst_size) {
+        /* TODO: CryptGenRandom? */
+        os::GenerateRandomBytes(dst, dst_size);
+        return 0;
+    }
+
+    errno_t epochtime(s64 *dst) {
+        /* TODO: Something more sane than this. */
+        auto ts   = os::ConvertToTimeSpan(os::GetSystemTick());
+        *dst = (ts.GetNanoSeconds() / INT64_C(100)) + INT64_C(0x8A09F909AE60000);
+        return 0;
+    }
+
+    errno_t getcpu(s32 *out) {
+        if (const auto core = sched_getcpu(); core >= 0) {
+            *out = core;
+            return 0;
+        } else {
+            return errno;
+        }
+    }
+
+}