refactor: promote new architecture to repository root

Archive the deprecated implementation under lume-legacy, make the new kernel the default root-level build, and update repository entry points without changing kernel behavior.

1 files changed, 0 insertions, 260 deletions

diff --git a/src/kernel/proc/exec.cc b/src/kernel/proc/exec.cc
deleted file mode 100644
index 8d8c467..0000000
--- a/src/kernel/proc/exec.cc
+++ /dev/null
@@ -1,260 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2026 Richard QIn
- */
-#include "common/types.h"
-#include "kernel/riscv.h"
-#include "kernel/proc.h"
-#include "kernel/mm.h"
-#include "kernel/elf.h"
-#include "fs/fs.h"
-#include "lib/string.h"
-#include "drivers/uart.h"
-#include "kernel/trap.h"
-
-extern char trampoline[];
-
-// RAII: Page Table Resource Management
-class VmGuard
-{
-public:
-    uint64 *pagetable = nullptr;
-    uint64 sz = 0;
-
-    VmGuard() : pagetable(VM::uvmcreate()) {}
-
-    ~VmGuard()
-    {
-        if (pagetable)
-        {
-            VM::uvmfree(pagetable, sz);
-        }
-    }
-
-    // Copying is prohibited
-    VmGuard(const VmGuard &) = delete;
-    VmGuard &operator=(const VmGuard &) = delete;
-
-    // Submit resources: Ownership transfer, destructor no longer releases
-    uint64 *commit()
-    {
-        uint64 *pt = pagetable;
-        pagetable = nullptr;
-        return pt;
-    }
-};
-
-// RAII: Inode Lock Management
-class InodeGuard
-{
-public:
-    Inode *ip;
-    InodeGuard(Inode *i) : ip(i)
-    {
-        if (ip)
-            VFS::ilock(ip);
-    }
-    ~InodeGuard()
-    {
-        if (ip)
-        {
-            VFS::iunlockput(ip); // Automatically unlock and release references
-        }
-    }
-    // Copying is prohibited
-    InodeGuard(const InodeGuard &) = delete;
-    InodeGuard &operator=(const InodeGuard &) = delete;
-};
-
-// laod segment
-static int loadseg(uint64 *pagetable, uint64 va, Inode *ip, uint64 offset, uint64 sz)
-{
-    for (uint64 i = 0; i < sz; i += PGSIZE)
-    {
-        uint64 pa = VM::walkaddr(pagetable, va + i);
-        if (pa == 0)
-        {
-            Drivers::uart_puts("[Exec Debug] loadseg: walkaddr failed\n");
-            return -1;
-        }
-
-        uint64 n = PGSIZE - (va + i) % PGSIZE;
-        if (i + n > sz)
-            n = sz - i;
-
-        // Read physical address (isUser=0)
-        if (ip->read((char *)(pa + (va + i) % PGSIZE), offset + i, n, 0) != (int)n)
-        {
-            Drivers::uart_puts("[Exec Debug] loadseg: read failed\n");
-            return -1;
-        }
-    }
-    return 0;
-}
-
-namespace Exec
-{
-    int exec(char *path, char **argv)
-    {
-        // 1. Get Inode
-        Inode *raw_ip = VFS::namei(path);
-        if (!raw_ip)
-        {
-            Drivers::uart_puts("[Exec Debug] namei failed for path: ");
-            Drivers::uart_puts(path);
-            Drivers::uart_puts("\n");
-            return -1;
-        }
-        InodeGuard iguard(raw_ip);
-
-        // Get ELF head
-        struct elfhdr elf;
-        if (raw_ip->read((char *)&elf, 0, sizeof(elf), 0) != sizeof(elf))
-        {
-            Drivers::uart_puts("[Exec Debug] read elf header failed\n");
-            return -1;
-        }
-        if (elf.magic != ELF_MAGIC)
-        {
-            Drivers::uart_puts("[Exec Debug] invalid elf magic\n");
-            return -1;
-        }
-
-        // Create new pagetable
-        VmGuard vm_guard;
-        if (!vm_guard.pagetable)
-        {
-            Drivers::uart_puts("[Exec Debug] uvmcreate failed\n");
-            return -1;
-        }
-
-        // Load Program Segment
-        struct proghdr ph;
-        for (int i = 0; i < elf.phnum; i++)
-        {
-            uint64 off = elf.phoff + i * sizeof(ph);
-            if (raw_ip->read((char *)&ph, off, sizeof(ph), 0) != sizeof(ph))
-            {
-                Drivers::uart_puts("[Exec Debug] read proghdr failed\n");
-                return -1;
-            }
-
-            if (ph.type != ELF_PROG_LOAD)
-                continue;
-            if (ph.memsz < ph.filesz)
-                return -1;
-            if (ph.vaddr + ph.memsz < ph.vaddr)
-                return -1;
-
-            uint64 sz1 = VM::uvmalloc(vm_guard.pagetable, vm_guard.sz, ph.vaddr + ph.memsz, PTE_W | PTE_X | PTE_R | PTE_U);
-            if (sz1 == 0)
-            {
-                Drivers::uart_puts("[Exec Debug] uvmalloc failed (segment)\n");
-                return -1;
-            }
-            vm_guard.sz = sz1;
-
-            if (loadseg(vm_guard.pagetable, ph.vaddr, raw_ip, ph.off, ph.filesz) < 0)
-                return -1;
-        }
-
-        // Prepare user stack
-        uint64 sz = PGROUNDUP(vm_guard.sz);
-
-        const int stack_data_pages = 16;
-        const int stack_total_pages = stack_data_pages + 1;
-
-        uint64 sz1 = VM::uvmalloc(vm_guard.pagetable, sz, sz + stack_total_pages * PGSIZE, PTE_W | PTE_R | PTE_U);
-        if (sz1 == 0)
-        {
-            Drivers::uart_puts("[Exec Debug] uvmalloc failed (stack)\n");
-            return -1;
-        }
-        vm_guard.sz = sz1;
-
-        VM::uvmunmap(vm_guard.pagetable, sz, 1, 0);
-
-        uint64 sp = sz1;
-        uint64 stackbase = sp - stack_data_pages * PGSIZE;
-        uint64 ustack[32];
-        uint64 argc = 0;
-
-        // Push parameter string
-        for (; argv[argc]; argc++)
-        {
-            if (argc >= 31)
-                return -1;
-            sp -= strlen(argv[argc]) + 1;
-            sp -= sp % 16;
-            if (sp < stackbase)
-            {
-                Drivers::uart_puts("[Exec Debug] stack overflow (args)\n");
-                return -1;
-            }
-
-            if (VM::copyout(vm_guard.pagetable, sp, argv[argc], strlen(argv[argc]) + 1) < 0)
-            {
-                Drivers::uart_puts("[Exec Debug] copyout arg string failed\n");
-                return -1;
-            }
-            ustack[argc] = sp;
-        }
-        ustack[argc] = 0;
-
-        // Push into parameter array
-        sp -= (argc + 1) * sizeof(uint64);
-        sp -= sp % 16;
-        if (sp < stackbase)
-        {
-            Drivers::uart_puts("[Exec Debug] stack overflow (argv array)\n");
-            return -1;
-        }
-        if (VM::copyout(vm_guard.pagetable, sp, (char *)ustack, (argc + 1) * sizeof(uint64)) < 0)
-        {
-            Drivers::uart_puts("[Exec Debug] copyout argv array failed\n");
-            return -1;
-        }
-
-        // Commit Changes
-        struct Proc *p = myproc();
-        if (VM::mappages(vm_guard.pagetable, TRAPFRAME, PGSIZE, (uint64)p->tf, PTE_R | PTE_W) < 0)
-        {
-            Drivers::uart_puts("[Exec Debug] mappages TRAPFRAME failed\n");
-            return -1;
-        }
-
-        uint64 oldsz = p->sz;
-        uint64 *oldpagetable = p->pagetable;
-
-        p->tf->a0 = argc;
-        p->tf->a1 = sp;
-        p->tf->sp = sp;
-        p->tf->epc = elf.entry;
-
-        char *s = path, *last = path;
-        while (*s)
-        {
-            if (*s == '/')
-                last = s + 1;
-            s++;
-        }
-
-        size_t len = 0;
-        while (last[len] && len < sizeof(p->name) - 1)
-        {
-            p->name[len] = last[len];
-            len++;
-        }
-        p->name[len] = '\0';
-
-        // change pagetable
-        p->pagetable = vm_guard.commit();
-        p->sz = vm_guard.sz;
-
-        // release old pagetable
-        VM::uvmfree(oldpagetable, oldsz);
-        asm volatile("fence.i");
-
-        return 0; // iguard unlocks and releases IP upon destruction
-    }
-}
\ No newline at end of file