feat(panic): FUCK [panic] mode=strict|fallback + realtest image variant
- UTSM panic_full returns in fallback mode (logs [PANIC:FALLBACK] + code + hit count); panic_halt keeps always-halt sites (CPU exception, VMM-E11 LA57, VMM-E15 DSK jump, UTSM-E42 test hook). Call sites given safe continuations. - Mode passed to DSK/FirstInit/login/desktop via DSK_BOOT_FLAG_PANIC_FALLBACK; DKM kernel_api.panic / kern.log.panic return to driver; ext4 fatal aborts the op via setjmp/longjmp and DSK falls back to FAT32 ESP. - build.ps1/Makefile: dev=strict, release=fallback, new realtest (release options + strict); default -Variant all; serialized iso packing under -j. - Fix '*/' inside comments (dkm.h, kernel_api.h, bus.c) that broke the build. - Includes pending work: dkm_bus service bus, mt7920/wlan drivers, desktop files/startmenu/prank, pe-tools, diskinfo, docs. Co-authored-by: Cursor <cursoragent@cursor.com>
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/* pciscan.cpp — Deshab PCI/CPU 扫描（控制台 PE64 工具）
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*
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* 在 CMD 里敲 "pciscan" 运行（cmd.elf PATH：FAT32 根 → bin/）。
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* 输出走串口（shim putchar/puts → COM1；QEMU -serial stdio 可见）。
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* 注意 shim printf 仅支持 3 个格式参数 —— 全部输出用自制助手拼行。
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*
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* 内容：CPUID 厂商/型号串/核心数/hypervisor 位 + PCI 配置空间枚举
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* （bus 0-3，0xCF8/0xCFC 直读，Ring0 原生执行）+ RTC 日期时间。
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*/
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#include <windows.h>
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typedef unsigned int u32;
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typedef unsigned char u8;
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typedef unsigned short u16;
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static inline void outp(u16 port, u32 v) {
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__asm__ volatile("outl %0,%1" :: "a"(v), "Nd"(port));
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}
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static inline u32 inp(u16 port) {
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u32 v;
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__asm__ volatile("inl %1,%0" : "=a"(v) : "Nd"(port));
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return v;
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}
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static inline u8 inpb(u16 port) {
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u8 v;
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__asm__ volatile("inb %1,%0" : "=a"(v) : "Nd"(port));
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return v;
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}
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static inline void outpb(u16 port, u8 v) {
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__asm__ volatile("outb %0,%1" :: "a"(v), "Nd"(port));
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}
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/* ---- 输出助手（shim printf 参数受限，逐段 puts/putchar 拼行） ---- */
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static void ps(const char *s) { while (*s) putchar(*s++); }
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static void pch(char c) { putchar(c); }
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static void pd(u32 v) {
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char b[12];
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int n = 0;
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if (v == 0) { pch('0'); return; }
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while (v > 0) { b[n++] = (char)('0' + v % 10); v /= 10; }
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while (n > 0) pch(b[--n]);
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}
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static void ph(u32 v) {
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static const char hd[] = "0123456789ABCDEF";
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ps("0x");
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for (int i = 7; i >= 0; i--) pch(hd[(v >> (i * 4)) & 0xF]);
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}
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static void ph4(u32 v) {
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static const char hd[] = "0123456789ABCDEF";
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for (int i = 3; i >= 0; i--) pch(hd[(v >> (i * 4)) & 0xF]);
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}
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static u32 pci_read(u16 bus, u16 dev, u16 fn, u8 off) {
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outp(0xCF8, 0x80000000u | ((u32)bus << 16) | ((u32)dev << 11)
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| ((u32)fn << 8) | off);
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return inp(0xCFC);
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}
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static void cpuid_(u32 leaf, u32 *a, u32 *b, u32 *c, u32 *d) {
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__asm__ volatile("cpuid" : "=a"(*a), "=b"(*b), "=c"(*c), "=d"(*d)
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: "a"(leaf), "c"(0));
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}
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static int bcd(u8 v) { return (v >> 4) * 10 + (v & 0xF); }
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int main(void) {
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/* ---- CPU ---- */
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u32 a, b, c, d;
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cpuid_(0, &a, &b, &c, &d);
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char vendor[13];
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((u32 *)vendor)[0] = b; ((u32 *)vendor)[1] = d; ((u32 *)vendor)[2] = c;
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vendor[12] = 0;
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ps("Deshab pciscan\r\n");
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ps("CPU vendor: "); ps(vendor); ps("\r\n");
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ps("CPUID max leaf: "); ph(a); ps("\r\n");
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char brand[49];
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brand[0] = 0;
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if (a >= 0x80000004u) {
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for (u32 leaf = 0x80000002u; leaf <= 0x80000004u; leaf++) {
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cpuid_(leaf, &a, &b, &c, &d);
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int off = (int)(leaf - 0x80000002u) * 16;
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((u32 *)brand)[off / 4 + 0] = a;
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((u32 *)brand)[off / 4 + 1] = b;
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((u32 *)brand)[off / 4 + 2] = c;
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((u32 *)brand)[off / 4 + 3] = d;
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}
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brand[48] = 0;
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ps("CPU brand: "); ps(brand); ps("\r\n");
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}
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cpuid_(1, &a, &b, &c, &d);
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ps("CPU cores (max APIC id): "); pd((b >> 16) & 0xFF); ps("\r\n");
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ps("Hypervisor: "); ps(((c >> 31) & 1) ? "yes" : "no"); ps("\r\n");
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/* ---- PCI ---- */
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ps("\r\nPCI devices (bus 0-3):\r\n");
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int found = 0;
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for (u16 bus = 0; bus < 4; bus++) {
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for (u16 dev = 0; dev < 32; dev++) {
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for (u16 fn = 0; fn < 8; fn++) {
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u32 vd = pci_read(bus, dev, fn, 0);
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u16 ven = vd & 0xFFFF, dev_id = vd >> 16;
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if (ven == 0xFFFF) continue;
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u32 cl = pci_read(bus, dev, fn, 8);
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u32 ht = pci_read(bus, dev, fn, 12);
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ps(" ");
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pd(bus); pch(':'); pd(dev); pch('.'); pch((char)('0' + fn));
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ps(" ");
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ph4(ven); pch(':'); ph4(dev_id);
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ps(" class "); ph4((cl >> 16) & 0xFFFF);
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ps(" rev "); ph4(cl & 0xFF);
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pch('\r'); pch('\n');
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found++;
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/* 非 multifunction 设备跳过 fn>0 */
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if (fn == 0 && !((ht >> 16) & 0x80)) break;
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}
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}
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}
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ps("Total PCI functions: "); pd((u32)found); ps("\r\n");
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/* ---- RTC ---- */
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outpb(0x70, 0x09); int yy = bcd(inpb(0x71));
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outpb(0x70, 0x08); int mo = bcd(inpb(0x71));
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outpb(0x70, 0x07); int dd = bcd(inpb(0x71));
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outpb(0x70, 0x04); int hh = bcd(inpb(0x71));
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outpb(0x70, 0x02); int mi = bcd(inpb(0x71));
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outpb(0x70, 0x00); int ss = bcd(inpb(0x71));
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if (yy < 100) yy += 2000;
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ps("RTC: "); pd((u32)yy); pch('-'); pd((u32)mo); pch('-'); pd((u32)dd);
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pch(' '); pd((u32)hh); pch(':'); pd((u32)mi); pch(':'); pd((u32)ss);
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ps("\r\n");
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ps("done.\r\n");
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ExitProcess(0);
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return 0;
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}
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