feat: Add Process Manager, Limine Framebuffer GUI, RTL8139 Net stack, and extended UNIX commands

include/abi/net.h

@@ -0,0 +1,82 @@
+#pragma once
+#include "stdint.h"
+#include "stddef.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define ETHERTYPE_IPv4 0x0800
+#define ETHERTYPE_ARP  0x0806
+
+#define IP_PROTO_ICMP  1
+#define IP_PROTO_TCP   6
+#define IP_PROTO_UDP   17
+
+#define ICMP_ECHO_REPLY   0
+#define ICMP_ECHO_REQUEST 8
+
+#pragma pack(push, 1)
+
+typedef struct {
+    uint8_t  dest_mac[6];
+    uint8_t  src_mac[6];
+    uint16_t ethertype;
+} eth_hdr_t;
+
+typedef struct {
+    uint16_t hw_type;
+    uint16_t proto_type;
+    uint8_t  hw_len;
+    uint8_t  proto_len;
+    uint16_t opcode;
+    uint8_t  sender_mac[6];
+    uint32_t sender_ip;
+    uint8_t  target_mac[6];
+    uint32_t target_ip;
+} arp_hdr_t;
+
+typedef struct {
+    uint8_t  version_ihl;
+    uint8_t  tos;
+    uint16_t total_length;
+    uint16_t id;
+    uint16_t flags_fragment;
+    uint8_t  ttl;
+    uint8_t  protocol;
+    uint16_t checksum;
+    uint32_t src_ip;
+    uint32_t dst_ip;
+} ipv4_hdr_t;
+
+typedef struct {
+    uint8_t  type;
+    uint8_t  code;
+    uint16_t checksum;
+    uint16_t id;
+    uint16_t sequence;
+} icmp_hdr_t;
+
+#pragma pack(pop)
+
+typedef struct {
+    uint32_t ip;
+    uint32_t netmask;
+    uint32_t gateway;
+    uint8_t  mac[6];
+} net_config_t;
+
+extern net_config_t g_net_cfg;
+
+// Net API
+void net_init(void);
+uint16_t net_checksum(const void *buf, size_t len);
+int net_send_arp_request(uint32_t target_ip);
+int net_send_icmp_ping(uint32_t target_ip, uint16_t seq);
+int net_poll_icmp_reply(uint32_t *from_ip, uint16_t *seq);
+uint32_t parse_ip(const char *str);
+void format_ip(uint32_t ip, char *buf);
+
+#ifdef __cplusplus
+}
+#endif

include/abi/syscalls.h

@@ -17,6 +17,9 @@
 #define SYS_SHUTDOWN        12  /* Power off QEMU / system */
 #define SYS_REBOOT          13  /* Reboot system */
 #define SYS_RTC_GET         14  /* Get CMOS real-time clock */
+#define SYS_FB_INFO         15  /* Query Limine Linear Framebuffer */
+#define SYS_PROC_KILL       16  /* Terminate process/thread by PID */
+#define SYS_DMESG           17  /* Retrieve kernel boot log */
 
 #ifndef __ASSEMBLER__
 
@@ -24,6 +27,14 @@
 extern "C" {
 #endif
 
+typedef struct fb_info_data {
+    uint64_t fb_addr;
+    uint64_t width;
+    uint64_t height;
+    uint64_t pitch;
+    uint32_t bpp;
+} fb_info_data_t;
+
 typedef struct sysinfo_data {
     uint64_t uptime_ticks;
     uint64_t total_memory_bytes;