// MIT License, Copyright (c) 2020 Marvin Borner #include #include #include #include #include #include #include #define PROC_STACK_SIZE 0x4000 s32 bin_load(const char *path, struct proc *proc) { if (!path || !memory_valid(path) || !proc) return -EFAULT; struct stat s = { 0 }; memory_bypass_enable(); s32 stat = vfs_stat(path, &s); memory_bypass_disable(); if (stat != 0) return stat; strcpy(proc->name, path); struct page_dir *prev; memory_backup_dir(&prev); memory_switch_dir(proc->page_dir); u32 size = PAGE_ALIGN_UP(s.size); u32 data = (u32)memory_alloc(proc->page_dir, size, MEMORY_USER | MEMORY_CLEAR); memory_bypass_enable(); s32 read = vfs_read(proc->name, (void *)data, 0, s.size); memory_bypass_disable(); if (read <= 0) { memory_switch_dir(prev); return read; } u32 stack = (u32)memory_alloc(proc->page_dir, PROC_STACK_SIZE, MEMORY_USER | MEMORY_CLEAR); proc->regs.ebp = stack; proc->regs.useresp = stack; proc->regs.eip = data; proc->entry = data; memory_switch_dir(prev); return 0; }