Re-factored sandbox into a single executable

sandbox/base/include/socks/types.h

@@ -0,0 +1,8 @@
+#ifndef SOCKS_TYPES_H_
+#define SOCKS_TYPES_H_
+
+#include <stdint.h>
+
+typedef uintptr_t phys_addr_t;
+
+#endif

sandbox/base/main.c

@@ -0,0 +1,68 @@
+#include <stdio.h>
+#include <stddef.h>
+#include <inttypes.h>
+#include <sys/mman.h>
+#include <socks/memblock.h>
+
+/* we're working with 4MiB of simulated system RAM */
+#define MEMORY_SIZE_MB 128
+
+/* virtual address of where system memory is mapped */
+static void *system_memory = NULL;
+
+#define MEMPTR(offset) ((uintptr_t)system_memory + (offset))
+#define MB_TO_BYTES(v) ((size_t)(v) * 0x100000)
+
+#define PHYS_TO_VIRT(p) ((void *)((uintptr_t)system_memory + (p)))
+#define VIRT_TO_PHYS(p) ((void *)((p) - (uintptr_t)system_memory))
+
+int main(int argc, const char **argv)
+{
+	system_memory = mmap(
+			NULL,
+			MB_TO_BYTES(MEMORY_SIZE_MB),
+			PROT_READ | PROT_WRITE,
+			MAP_PRIVATE | MAP_ANONYMOUS,
+			-1, 0);
+
+	if (system_memory == MAP_FAILED) {
+		perror("mmap");
+		fprintf(stderr, "cannot allocate simulated system RAM buffer\n");
+		return -1;
+	}
+
+	printf("allocated %u MiB (0x%zx bytes) of memory to act as system RAM at %p\n", MEMORY_SIZE_MB, MB_TO_BYTES(MEMORY_SIZE_MB), system_memory);
+
+	memblock_add(0, MB_TO_BYTES(MEMORY_SIZE_MB));
+
+	memblock_reserve(0x10000, 0x40000);
+	memblock_reserve(0x60000, 0x20000);
+	memblock_reserve(0x30000, 0x40000);
+	memblock_reserve(0x100000, 0x10000);
+
+	printf("memory regions:\n");
+
+	memblock_iter_t it;
+	for_each_mem_range(&it, 0, 0x100000) {
+		printf("\t%08" PRIxPTR "-%08" PRIxPTR "\n",
+				it.base,
+				it.limit);
+	}
+
+	printf("reserved regions:\n");
+	for_each_reserved_mem_range(&it, 0, 0x100000) {
+		printf("\t%08" PRIxPTR "-%08" PRIxPTR "\n",
+				it.base,
+				it.limit);
+	}
+
+	printf("free regions:\n");
+	for_each_free_mem_range(&it, 0, ULLONG_MAX) {
+		printf("\t%08" PRIxPTR "-%08" PRIxPTR "\n",
+				it.base,
+				it.limit);
+	}
+
+	munmap(system_memory, MB_TO_BYTES(MEMORY_SIZE_MB));
+	return 0;
+}