minix/include/minix/ipc.h
Ben Gras 2d72cbec41 SYSENTER/SYSCALL support
. add cpufeature detection of both
	. use it for both ipc and kernelcall traps, using a register
	  for call number
	. SYSENTER/SYSCALL does not save any context, therefore userland
	  has to save it
	. to accomodate multiple kernel entry/exit types, the entry
	  type is recorded in the process struct. hitherto all types
	  were interrupt (soft int, exception, hard int); now SYSENTER/SYSCALL
	  is new, with the difference that context is not fully restored
	  from proc struct when running the process again. this can't be
	  done as some information is missing.
	. complication: cases in which the kernel has to fully change
	  process context (i.e. sigreturn). in that case the exit type
	  is changed from SYSENTER/SYSEXIT to soft-int (i.e. iret) and
	  context is fully restored from the proc struct. this does mean
	  the PC and SP must change, as the sysenter/sysexit userland code
	  will otherwise try to restore its own context. this is true in the
	  sigreturn case.
	. override all usage by setting libc_ipc=1
2012-09-24 15:53:43 +02:00

189 lines
5.7 KiB
C

#ifndef _IPC_H
#define _IPC_H
#ifdef __NBSD_LIBC
#endif
#include <minix/ipcconst.h>
#include <minix/type.h>
#include <minix/const.h>
/*==========================================================================*
* Types relating to messages. *
*==========================================================================*/
#define M1 1
#define M3 3
#define M4 4
#define M3_STRING 14 /* legacy m3_ca1 size (must not be changed) */
#define M3_LONG_STRING 16 /* current m3_ca1 size (may be increased) */
typedef struct {int m1i1, m1i2, m1i3; char *m1p1, *m1p2, *m1p3;} mess_1;
typedef struct {int m2i1, m2i2, m2i3; long m2l1, m2l2; char *m2p1;
short m2s1;} mess_2;
typedef struct {int m3i1, m3i2; char *m3p1; char m3ca1[M3_LONG_STRING];} mess_3;
typedef struct {long m4l1, m4l2, m4l3, m4l4, m4l5;} mess_4;
typedef struct {short m5s1, m5s2; int m5i1, m5i2; long m5l1, m5l2, m5l3;}mess_5;
typedef struct {long m6l1, m6l2, m6l3; short m6s1, m6s2, m6s3; char m6c1, m6c2;
char *m6p1, *m6p2;} mess_6;
typedef struct {int m7i1, m7i2, m7i3, m7i4, m7i5; char *m7p1, *m7p2;} mess_7;
typedef struct {int m8i1, m8i2; char *m8p1, *m8p2, *m8p3, *m8p4;} mess_8;
typedef struct {long m9l1, m9l2, m9l3, m9l4, m9l5;
short m9s1, m9s2, m9s3, m9s4; } mess_9;
typedef struct {int m10i1, m10i2, m10i3, m10i4;
long m10l1, m10l2, m10l3; } mess_10;
typedef struct {
endpoint_t m_source; /* who sent the message */
int m_type; /* what kind of message is it */
union {
mess_1 m_m1;
mess_2 m_m2;
mess_3 m_m3;
mess_4 m_m4;
mess_5 m_m5;
mess_7 m_m7;
mess_8 m_m8;
mess_6 m_m6;
mess_9 m_m9;
mess_10 m_m10;
} m_u;
} message __aligned(16);
/* The following defines provide names for useful members. */
#define m1_i1 m_u.m_m1.m1i1
#define m1_i2 m_u.m_m1.m1i2
#define m1_i3 m_u.m_m1.m1i3
#define m1_p1 m_u.m_m1.m1p1
#define m1_p2 m_u.m_m1.m1p2
#define m1_p3 m_u.m_m1.m1p3
#define m2_i1 m_u.m_m2.m2i1
#define m2_i2 m_u.m_m2.m2i2
#define m2_i3 m_u.m_m2.m2i3
#define m2_l1 m_u.m_m2.m2l1
#define m2_l2 m_u.m_m2.m2l2
#define m2_p1 m_u.m_m2.m2p1
#define m2_s1 m_u.m_m2.m2s1
#define m3_i1 m_u.m_m3.m3i1
#define m3_i2 m_u.m_m3.m3i2
#define m3_p1 m_u.m_m3.m3p1
#define m3_ca1 m_u.m_m3.m3ca1
#define m4_l1 m_u.m_m4.m4l1
#define m4_l2 m_u.m_m4.m4l2
#define m4_l3 m_u.m_m4.m4l3
#define m4_l4 m_u.m_m4.m4l4
#define m4_l5 m_u.m_m4.m4l5
#define m5_s1 m_u.m_m5.m5s1
#define m5_s2 m_u.m_m5.m5s2
#define m5_i1 m_u.m_m5.m5i1
#define m5_i2 m_u.m_m5.m5i2
#define m5_l1 m_u.m_m5.m5l1
#define m5_l2 m_u.m_m5.m5l2
#define m5_l3 m_u.m_m5.m5l3
#define m6_l1 m_u.m_m6.m6l1
#define m6_l2 m_u.m_m6.m6l2
#define m6_l3 m_u.m_m6.m6l3
#define m6_s1 m_u.m_m6.m6s1
#define m6_s2 m_u.m_m6.m6s2
#define m6_s3 m_u.m_m6.m6s3
#define m6_c1 m_u.m_m6.m6c1
#define m6_c2 m_u.m_m6.m6c2
#define m6_p1 m_u.m_m6.m6p1
#define m6_p2 m_u.m_m6.m6p2
#define m7_i1 m_u.m_m7.m7i1
#define m7_i2 m_u.m_m7.m7i2
#define m7_i3 m_u.m_m7.m7i3
#define m7_i4 m_u.m_m7.m7i4
#define m7_i5 m_u.m_m7.m7i5
#define m7_p1 m_u.m_m7.m7p1
#define m7_p2 m_u.m_m7.m7p2
#define m8_i1 m_u.m_m8.m8i1
#define m8_i2 m_u.m_m8.m8i2
#define m8_p1 m_u.m_m8.m8p1
#define m8_p2 m_u.m_m8.m8p2
#define m8_p3 m_u.m_m8.m8p3
#define m8_p4 m_u.m_m8.m8p4
#define m9_l1 m_u.m_m9.m9l1
#define m9_l2 m_u.m_m9.m9l2
#define m9_l3 m_u.m_m9.m9l3
#define m9_l4 m_u.m_m9.m9l4
#define m9_l5 m_u.m_m9.m9l5
#define m9_s1 m_u.m_m9.m9s1
#define m9_s2 m_u.m_m9.m9s2
#define m9_s3 m_u.m_m9.m9s3
#define m9_s4 m_u.m_m9.m9s4
#define m10_i1 m_u.m_m10.m10i1
#define m10_i2 m_u.m_m10.m10i2
#define m10_i3 m_u.m_m10.m10i3
#define m10_i4 m_u.m_m10.m10i4
#define m10_l1 m_u.m_m10.m10l1
#define m10_l2 m_u.m_m10.m10l2
#define m10_l3 m_u.m_m10.m10l3
/*==========================================================================*
* Minix run-time system (IPC). *
*==========================================================================*/
/* Datastructure for asynchronous sends */
typedef struct asynmsg
{
unsigned flags;
endpoint_t dst;
int result;
message msg;
} asynmsg_t;
/* Defines for flags field */
#define AMF_EMPTY 000 /* slot is not inuse */
#define AMF_VALID 001 /* slot contains message */
#define AMF_DONE 002 /* Kernel has processed the message. The
* result is stored in 'result'
*/
#define AMF_NOTIFY 004 /* Send a notification when AMF_DONE is set */
#define AMF_NOREPLY 010 /* Not a reply message for a SENDREC */
#define AMF_NOTIFY_ERR 020 /* Send a notification when AMF_DONE is set and
* delivery of the message failed */
int _send_orig(endpoint_t dest, message *m_ptr);
int _receive_orig(endpoint_t src, message *m_ptr, int *status_ptr);
int _sendrec_orig(endpoint_t src_dest, message *m_ptr);
int _sendnb_orig(endpoint_t dest, message *m_ptr);
int _notify_orig(endpoint_t dest);
int _senda_orig(asynmsg_t *table, size_t count);
int _do_kernel_call_orig(message *m_ptr);
int _minix_kernel_info_struct(struct minix_kerninfo **);
struct minix_ipcvecs {
int (*send_ptr)(endpoint_t dest, message *m_ptr);
int (*receive_ptr)(endpoint_t src, message *m_ptr, int *st);
int (*sendrec_ptr)(endpoint_t src_dest, message *m_ptr);
int (*sendnb_ptr)(endpoint_t dest, message *m_ptr);
int (*notify_ptr)(endpoint_t dest);
int (*do_kernel_call_ptr)(message *m_ptr);
int (*senda_ptr)(asynmsg_t *table, size_t count);
};
/* kernel-set IPC vectors retrieved by a constructor in libc/sys-minix/init.c */
extern struct minix_ipcvecs _minix_ipcvecs;
#define CHOOSETRAP(name) (_minix_ipcvecs. name ## _ptr)
#define send CHOOSETRAP(send)
#define receive CHOOSETRAP(receive)
#define sendrec CHOOSETRAP(sendrec)
#define sendnb CHOOSETRAP(sendnb)
#define notify CHOOSETRAP(notify)
#define do_kernel_call CHOOSETRAP(do_kernel_call)
#define senda CHOOSETRAP(senda)
#endif /* _IPC_H */