问题 Why does this fail, once Masm reaches jmp? struct gdt_entry { unsigned short limit_low; unsigned short base_low; unsigned char base_middle; unsigned char access; unsigned char granularity; unsigned char base_high; }; struct gdt_ptr { unsigned short limit; unsigned int base; }; struct gdt_entry gdt[3]; struct gdt_ptr gp; void gdt_flush() { __asm{ lgdt [gp] mov ax, 0x10 mov ds, ax mov es, ax mov fs, ax mov gs, ax mov ss, ax ; push the address on the stack push 0x08 mov eax, offset flush2 push