Linehu
3aa15e7b21
- log.c: color context (log_set_color / log_color_enable); ANSI only goes to serial, BOOTLOG.TXT buffer stays clean plain text - kernel_api.c: dkm_log_set_driver() — driver-name FNV-1a hash into an 8-color bright ANSI palette, deterministic per driver - load sites (dkm_core builtin + boot_modules external) set color around driver_init and clear after - FUCK [debug] color_log gate (dev=1, release=0) - QEMU verified: 1150 colored lines, per-driver stable colors (.build_tmp/qemu_serial_d4color.log)
133 lines
3.8 KiB
C
133 lines
3.8 KiB
C
#include <utsm/log.h>
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/* ---- 内存日志缓冲区（实机启动日志持久化） ----
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* 默认启用捕获：所有日志同时写串口和内存缓冲。
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* 块设备就绪后由 disk_log_flush() 把缓冲区写入 FAT32 文件
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* SYSTEM/DESHAB64/DEV/BOOTLOG.TXT（DEV 缺失时回退根目录 BOOTLOG.TXT）。 */
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#define LOG_BUF_SIZE 524288u /* 512KB, 覆盖 LBA 2-1000 (999 扇区 ~500KB) */
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static char g_log_buf[LOG_BUF_SIZE];
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static u32 g_log_len = 0;
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static int g_log_capture_on = 1;
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void log_capture_enable(int enable) {
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g_log_capture_on = enable;
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}
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const char *log_get_buffer(void) {
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return g_log_buf;
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}
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u32 log_get_length(void) {
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return g_log_len;
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}
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static void log_emit(const char *s) {
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/* Phase7: 日志行临界区——抢占可能把一行日志切成两半（串口与
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* BOOTLOG 缓冲都会花），pushfq/popfq 保存并恢复本上下文的 IF。 */
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u64 flags;
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__asm__ volatile("pushfq; popq %0; cli" : "=r"(flags) :: "memory");
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serial_write(s);
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if (g_log_capture_on && s) {
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while (*s) {
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if (g_log_len < LOG_BUF_SIZE) {
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g_log_buf[g_log_len++] = *s;
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}
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s++;
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}
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}
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/* BUG-GP-IRET: 只恢复 IF，不做全量 popfq。全量 popfq 会把进入本
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* 函数前 flags 里的历史污染位（如 NT=1）原样写回 RFLAGS 并在上下文
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* 间传播（NT=1 时下一次 iretq 直接 #GP(0)）。本临界区的语义仅仅是
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* "保存并恢复 IF"。 */
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if (flags & (1ULL << 9)) { /* 恢复进入前的 IF */
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__asm__ volatile("sti" ::: "memory");
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}
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}
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/* ---- D4: DKM 彩色日志 ----
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* 驱动 init 期间由 dkm_log_set_driver() 设置 ANSI 颜色上下文；
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* 颜色只走串口（QEMU stdio 可见），BOOTLOG 缓冲保持纯文本。 */
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static const char *g_log_color = 0;
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static int g_log_color_on = 1;
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void log_set_color(const char *ansi) {
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g_log_color = ansi;
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}
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void log_color_enable(int enable) {
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g_log_color_on = enable;
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if (!enable) g_log_color = 0;
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}
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/* 串口带色输出 + 缓冲纯文本（临界区内） */
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static void log_emit_colored(const char *color, const char *a,
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const char *b, const char *c) {
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u64 flags;
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__asm__ volatile("pushfq; popq %0; cli" : "=r"(flags) :: "memory");
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serial_write(color);
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serial_write(a);
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if (b) serial_write(b);
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if (c) serial_write(c);
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serial_write("\x1b[0m\n");
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if (g_log_capture_on) {
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const char *parts[3] = { a, b, c };
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for (int i = 0; i < 3; i++) {
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const char *s = parts[i];
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if (!s) continue;
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while (*s) {
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if (g_log_len < LOG_BUF_SIZE) {
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g_log_buf[g_log_len++] = *s;
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}
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s++;
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}
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}
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if (g_log_len < LOG_BUF_SIZE) {
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g_log_buf[g_log_len++] = '\n';
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}
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}
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if (flags & (1ULL << 9)) {
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__asm__ volatile("sti" ::: "memory");
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}
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}
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static void log_line(const char *level, const char *msg) {
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if (g_log_color && g_log_color_on) {
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log_emit_colored(g_log_color, level, " ", msg);
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return;
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}
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log_emit(level);
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log_emit(" ");
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log_emit(msg);
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log_emit("\n");
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}
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void log_info(const char *msg) {
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log_line("[INFO]", msg);
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}
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void log_warn(const char *msg) {
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log_line("[WARN]", msg);
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}
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void log_error(const char *msg) {
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log_line("[ERR ]", msg);
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}
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void log_hex64(const char *prefix, u64 value) {
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static const char hex[] = "0123456789abcdef";
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char buf[19];
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buf[0] = '0';
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buf[1] = 'x';
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for (int i = 0; i < 16; i++) {
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buf[2 + i] = hex[(value >> ((15 - i) * 4)) & 0xf];
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}
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buf[18] = 0;
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if (g_log_color && g_log_color_on) {
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log_emit_colored(g_log_color, prefix, buf, 0);
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return;
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}
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log_emit(prefix);
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log_emit(buf);
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log_emit("\n");
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}
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