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Annotation of linux/include/asm/system.h, revision 1.1

1.1     ! root        1: #define move_to_user_mode() \
        !             2: __asm__ ("movl %%esp,%%eax\n\t" \
        !             3:        "pushl $0x17\n\t" \
        !             4:        "pushl %%eax\n\t" \
        !             5:        "pushfl\n\t" \
        !             6:        "pushl $0x0f\n\t" \
        !             7:        "pushl $1f\n\t" \
        !             8:        "iret\n" \
        !             9:        "1:\tmovl $0x17,%%eax\n\t" \
        !            10:        "movw %%ax,%%ds\n\t" \
        !            11:        "movw %%ax,%%es\n\t" \
        !            12:        "movw %%ax,%%fs\n\t" \
        !            13:        "movw %%ax,%%gs" \
        !            14:        :::"ax")
        !            15: 
        !            16: #define sti() __asm__ ("sti"::)
        !            17: #define cli() __asm__ ("cli"::)
        !            18: #define nop() __asm__ ("nop"::)
        !            19: 
        !            20: #define iret() __asm__ ("iret"::)
        !            21: 
        !            22: #define _set_gate(gate_addr,type,dpl,addr) \
        !            23: __asm__ ("movw %%dx,%%ax\n\t" \
        !            24:        "movw %0,%%dx\n\t" \
        !            25:        "movl %%eax,%1\n\t" \
        !            26:        "movl %%edx,%2" \
        !            27:        : \
        !            28:        : "i" ((short) (0x8000+(dpl<<13)+(type<<8))), \
        !            29:        "o" (*((char *) (gate_addr))), \
        !            30:        "o" (*(4+(char *) (gate_addr))), \
        !            31:        "d" ((char *) (addr)),"a" (0x00080000))
        !            32: 
        !            33: #define set_intr_gate(n,addr) \
        !            34:        _set_gate(&idt[n],14,0,addr)
        !            35: 
        !            36: #define set_trap_gate(n,addr) \
        !            37:        _set_gate(&idt[n],15,0,addr)
        !            38: 
        !            39: #define set_system_gate(n,addr) \
        !            40:        _set_gate(&idt[n],15,3,addr)
        !            41: 
        !            42: #define _set_seg_desc(gate_addr,type,dpl,base,limit) {\
        !            43:        *(gate_addr) = ((base) & 0xff000000) | \
        !            44:                (((base) & 0x00ff0000)>>16) | \
        !            45:                ((limit) & 0xf0000) | \
        !            46:                ((dpl)<<13) | \
        !            47:                (0x00408000) | \
        !            48:                ((type)<<8); \
        !            49:        *((gate_addr)+1) = (((base) & 0x0000ffff)<<16) | \
        !            50:                ((limit) & 0x0ffff); }
        !            51: 
        !            52: #define _set_tssldt_desc(n,addr,type) \
        !            53: __asm__ ("movw $104,%1\n\t" \
        !            54:        "movw %%ax,%2\n\t" \
        !            55:        "rorl $16,%%eax\n\t" \
        !            56:        "movb %%al,%3\n\t" \
        !            57:        "movb $" type ",%4\n\t" \
        !            58:        "movb $0x00,%5\n\t" \
        !            59:        "movb %%ah,%6\n\t" \
        !            60:        "rorl $16,%%eax" \
        !            61:        ::"a" (addr), "m" (*(n)), "m" (*(n+2)), "m" (*(n+4)), \
        !            62:         "m" (*(n+5)), "m" (*(n+6)), "m" (*(n+7)) \
        !            63:        )
        !            64: 
        !            65: #define set_tss_desc(n,addr) _set_tssldt_desc(((char *) (n)),addr,"0x89")
        !            66: #define set_ldt_desc(n,addr) _set_tssldt_desc(((char *) (n)),addr,"0x82")

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