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/*[
c_xfer.h
Transfer of Control Support.
----------------------------
LOCAL CHAR SccsID[]="@(#)c_xfer.h 1.5 02/17/95";
]*/
/*
Bit mapped identities (caller_id) for the invokers of far
transfers of control.
*/
#define CALL_ID 0
#define JMP_ID 1
#define INT_ID 0
/*
Legal far destinations (dest_type).
*/
/* greater privilege is mapped directly to the Intel privilege */
#define MORE_PRIVILEGE0 0
#define MORE_PRIVILEGE1 1
#define MORE_PRIVILEGE2 2
/* our own (arbitary) mappings */
#define SAME_LEVEL 3
#define LOWER_PRIVILEGE 4
#define NEW_TASK 5
IMPORT VOID update_relative_ip
IPT1(
IU32, rel_offset
);
IMPORT VOID validate_far_dest
IPT6(
IU16 *, cs,
IU32 *, ip,
IU32 *, descr_addr,
IU8 *, count,
ISM32 *, dest_type,
ISM32, caller_id
);
IMPORT VOID validate_gate_dest
IPT4(
ISM32, caller_id,
IU16, new_cs,
IU32 *, descr_addr,
ISM32 *, dest_type
);
IMPORT ISM32 validate_task_dest
IPT2(
IU16, selector,
IU32 *, descr_addr
);
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