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#include "xendefs.h"
#include "mem.h"
/*
* This must match io.h.
*/
#define VectorSYSCALL 0x40
/*
* Used to get to the first process:
* set up an interrupt return frame and IRET to user level.
*/
TEXT touser(SB), $0
PUSHL $(UDSEL) /* old ss */
MOVL sp+0(FP), AX /* old sp */
PUSHL AX
MOVL $0x200, AX /* interrupt enable flag */
PUSHL AX /* old flags */
PUSHL $(UESEL) /* old cs */
PUSHL $(UTZERO+32) /* old pc */
MOVL $(UDSEL), AX
MOVW AX, DS
MOVW AX, ES
MOVW AX, GS
MOVW AX, FS
IRETL
/*
* This is merely _strayintr from l.s optimised to vector
* to syscall() without going through trap().
*/
TEXT _syscallintr(SB), $0
PUSHL $VectorSYSCALL /* trap type */
PUSHL DS
PUSHL ES
PUSHL FS
PUSHL GS
PUSHAL
MOVL $(KDSEL), AX
MOVW AX, DS
MOVW AX, ES
PUSHL SP
CALL syscall(SB)
POPL AX
POPAL
POPL GS
POPL FS
POPL ES
POPL DS
ADDL $8, SP /* pop error code and trap type */
IRETL
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