1 files changed, 54 insertions, 0 deletions
diff --git a/kernel_call/platform.c b/kernel_call/platform.c
new file mode 100755
index 0000000..6ced006
--- /dev/null
+++ b/kernel_call/platform.c
@@ -0,0 +1,54 @@
+/*
+ * platform.c
+ * Brandon Azad
+ */
+#define PLATFORM_EXTERN
+#include "platform.h"
+
+#include <assert.h>
+#include <mach/mach.h>
+#include <sys/sysctl.h>
+#include <sys/utsname.h>
+
+#include "log.h"
+
+// ---- Initialization ----------------------------------------------------------------------------
+
+void
+platform_init() {
+	// Only initialize once.
+	static bool initialized = false;
+	if (initialized) {
+		return;
+	}
+	initialized = true;
+	// Set the page size.
+	platform.page_size = vm_kernel_page_size;
+	page_size = platform.page_size;
+	// Get the machine name (e.g. iPhone11,8).
+	struct utsname u = {};
+	int error = uname(&u);
+	assert(error == 0);
+	strncpy((char *)platform.machine, u.machine, sizeof(platform.machine));
+	// Get the build (e.g. 16C50).
+	size_t osversion_size = sizeof(platform.osversion);
+	error = sysctlbyname("kern.osversion",
+			(void *)platform.osversion, &osversion_size, NULL, 0);
+	assert(error == 0);
+	// Get basic host info.
+	mach_port_t host = mach_host_self();
+	assert(MACH_PORT_VALID(host));
+	host_basic_info_data_t basic_info;
+	mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
+	kern_return_t kr = host_info(host, HOST_BASIC_INFO, (host_info_t) &basic_info, &count);
+	assert(kr == KERN_SUCCESS);
+	platform.cpu_type     = basic_info.cpu_type;
+	platform.cpu_subtype  = basic_info.cpu_subtype;
+	platform.physical_cpu = basic_info.physical_cpu;
+	platform.logical_cpu  = basic_info.logical_cpu;
+	platform.memory_size  = basic_info.max_mem;
+    INFO("memory_size: %zu", platform.memory_size);
+	mach_port_deallocate(mach_task_self(), host);
+	// Log basic platform info.
+	DEBUG_TRACE(1, "platform: %s %s", platform.machine, platform.osversion);
+}