feat(kernel): Add eBPF Virtual Machine & Verifier, VMA Memory Mapper, Sysfs KObject Tree, Unix98 PTY, and 2D Canvas Graphics Engine

include/kernel/bpf.h

@@ -0,0 +1,95 @@
+#ifndef _KERNEL_BPF_H
+#define _KERNEL_BPF_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+#define BPF_MAX_INSNS 256
+#define BPF_MAX_MAPS  16
+#define BPF_MAX_PROGS 16
+#define BPF_REG_CNT   11 // R0 (ret), R1-R5 (args), R6-R9 (callee-saved), R10 (frame pointer)
+
+// BPF Instruction Class
+#define BPF_CLASS_LD   0x00
+#define BPF_CLASS_LDX  0x01
+#define BPF_CLASS_ST   0x02
+#define BPF_CLASS_STX  0x03
+#define BPF_CLASS_ALU  0x04
+#define BPF_CLASS_JMP  0x05
+#define BPF_CLASS_ALU64 0x07
+
+// BPF ALU Operations
+#define BPF_OP_ADD  0x00
+#define BPF_OP_SUB  0x10
+#define BPF_OP_MUL  0x20
+#define BPF_OP_DIV  0x30
+#define BPF_OP_OR   0x40
+#define BPF_OP_AND  0x50
+#define BPF_OP_LSH  0x60
+#define BPF_OP_RSH  0x70
+#define BPF_OP_NEG  0x80
+#define BPF_OP_MOD  0x90
+#define BPF_OP_XOR  0xa0
+#define BPF_OP_MOV  0xb0
+
+// BPF Jump Operations
+#define BPF_JMP_JA   0x00
+#define BPF_JMP_JEQ  0x10
+#define BPF_JMP_JGT  0x20
+#define BPF_JMP_JGE  0x30
+#define BPF_JMP_JNE  0x50
+#define BPF_JMP_CALL 0x80
+#define BPF_JMP_EXIT 0x90
+
+typedef struct {
+    uint8_t  opcode;
+    uint8_t  dst_reg:4;
+    uint8_t  src_reg:4;
+    int16_t  offset;
+    int32_t  imm;
+} __attribute__((packed)) bpf_insn_t;
+
+typedef enum {
+    BPF_PROG_TYPE_UNSPEC = 0,
+    BPF_PROG_TYPE_SOCKET_FILTER,
+    BPF_PROG_TYPE_KPROBE,
+    BPF_PROG_TYPE_TRACEPOINT,
+    BPF_PROG_TYPE_XDP,
+    BPF_PROG_TYPE_SYSCALL
+} bpf_prog_type_t;
+
+typedef struct {
+    uint32_t id;
+    char name[32];
+    bpf_prog_type_t type;
+    bpf_insn_t insns[BPF_MAX_INSNS];
+    uint32_t insn_count;
+    uint64_t run_count;
+    uint64_t total_runtime_ns;
+    bool in_use;
+} bpf_prog_t;
+
+typedef struct {
+    uint32_t id;
+    char name[32];
+    uint32_t key_size;
+    uint32_t value_size;
+    uint32_t max_entries;
+    uint8_t* data;
+    bool in_use;
+} bpf_map_t;
+
+void bpf_init(void);
+int  bpf_prog_load(bpf_prog_type_t type, const char* name, const bpf_insn_t* insns, uint32_t count);
+int  bpf_prog_run(uint32_t prog_id, void* ctx, uint64_t* ret_val);
+bool bpf_verify_prog(const bpf_insn_t* insns, uint32_t count);
+
+int  bpf_map_create(const char* name, uint32_t key_size, uint32_t value_size, uint32_t max_entries);
+int  bpf_map_update_elem(uint32_t map_id, const void* key, const void* value);
+int  bpf_map_lookup_elem(uint32_t map_id, const void* key, void* value_out);
+
+size_t bpf_get_prog_count(void);
+const bpf_prog_t* bpf_get_prog(size_t index);
+
+#endif // _KERNEL_BPF_H

include/kernel/kobject.h

@@ -0,0 +1,38 @@
+#ifndef _KERNEL_KOBJECT_H
+#define _KERNEL_KOBJECT_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+#define KOBJ_NAME_LEN 32
+#define MAX_KOBJECTS  64
+
+typedef enum {
+    KOBJ_TYPE_GENERIC = 0,
+    KOBJ_TYPE_BUS,
+    KOBJ_TYPE_DEVICE,
+    KOBJ_TYPE_DRIVER,
+    KOBJ_TYPE_CLASS,
+    KOBJ_TYPE_SUBSYS
+} kobj_type_t;
+
+typedef struct kobject {
+    char name[KOBJ_NAME_LEN];
+    kobj_type_t type;
+    struct kobject* parent;
+    uint32_t ref_count;
+    char path[128];
+    bool in_use;
+} kobject_t;
+
+void kobject_subsystem_init(void);
+kobject_t* kobject_create_and_add(const char* name, kobj_type_t type, kobject_t* parent);
+void kobject_get(kobject_t* kobj);
+void kobject_put(kobject_t* kobj);
+
+size_t kobject_get_total_count(void);
+const kobject_t* kobject_get_at(size_t index);
+void kobject_dump_tree(void);
+
+#endif // _KERNEL_KOBJECT_H