syscall.h

Commit: 5ef818f0 Author: jokerz Raw Copy

/* syscall.h - System call interface for Pactor64 */

#ifndef _SYSCALL_H

#define _SYSCALL_H

#include "pactor64.h"

/* Linux x86-64 compatible syscall numbers */

#define SYS_READ    0

#define SYS_WRITE   1

#define SYS_OPEN    2

#define SYS_CLOSE   3

#define SYS_LSEEK   8

#define SYS_BRK     12

#define SYS_IOCTL   16

#define SYS_PIPE    22

#define SYS_DUP     32

#define SYS_GETPID  39

#define SYS_EXIT    60

#define SYS_GETUID  102

#define SYS_GETGID  104

/* MSR addresses for SYSCALL support */

#define MSR_STAR    0xC0000081

#define MSR_LSTAR   0xC0000082

#define MSR_FMASK   0xC0000084

#define MAX_SYSCALL 128

/* Initialize the syscall interface (sets up STAR/LSTAR MSRs) */

void syscall_init(void);

/* The syscall handler (called from assembly stub) */

uint64_t syscall_dispatch(uint64_t num, uint64_t arg1, uint64_t arg2,

                          uint64_t arg3, uint64_t arg4, uint64_t arg5);

/* Assembly syscall entry point */

extern void syscall_entry(void);

/* Return from userspace back to kernel shell (called from sys_exit) */

extern void return_to_kernel(void) __attribute__((noreturn));

/* Low-level MSR read/write */

static inline uint64_t read_msr(uint32_t msr) {

    uint32_t lo, hi;

    __asm__ volatile ("rdmsr" : "=a"(lo), "=d"(hi) : "c"(msr));

    return ((uint64_t)hi << 32) | lo;

}

static inline void write_msr(uint32_t msr, uint64_t val) {

    uint32_t lo = (uint32_t)val;

    uint32_t hi = (uint32_t)(val >> 32);

    __asm__ volatile ("wrmsr" : : "a"(lo), "d"(hi), "c"(msr));

}

#endif /* _SYSCALL_H */

1	/* syscall.h - System call interface for Pactor64 */
2	#ifndef _SYSCALL_H
3	#define _SYSCALL_H
4
5	#include "pactor64.h"
6
7	/* Linux x86-64 compatible syscall numbers */
8	#define SYS_READ 0
9	#define SYS_WRITE 1
10	#define SYS_OPEN 2
11	#define SYS_CLOSE 3
12	#define SYS_LSEEK 8
13	#define SYS_BRK 12
14	#define SYS_IOCTL 16
15	#define SYS_PIPE 22
16	#define SYS_DUP 32
17	#define SYS_GETPID 39
18	#define SYS_EXIT 60
19	#define SYS_GETUID 102
20	#define SYS_GETGID 104
21
22	/* MSR addresses for SYSCALL support */
23	#define MSR_STAR 0xC0000081
24	#define MSR_LSTAR 0xC0000082
25	#define MSR_FMASK 0xC0000084
26
27	#define MAX_SYSCALL 128
28
29	/* Initialize the syscall interface (sets up STAR/LSTAR MSRs) */
30	void syscall_init(void);
31
32	/* The syscall handler (called from assembly stub) */
33	uint64_t syscall_dispatch(uint64_t num, uint64_t arg1, uint64_t arg2,
34	uint64_t arg3, uint64_t arg4, uint64_t arg5);
35
36	/* Assembly syscall entry point */
37	extern void syscall_entry(void);
38
39	/* Return from userspace back to kernel shell (called from sys_exit) */
40	extern void return_to_kernel(void) __attribute__((noreturn));
41
42	/* Low-level MSR read/write */
43	static inline uint64_t read_msr(uint32_t msr) {
44	uint32_t lo, hi;
45	__asm__ volatile ("rdmsr" : "=a"(lo), "=d"(hi) : "c"(msr));
46	return ((uint64_t)hi << 32) \| lo;
47	}
48
49	static inline void write_msr(uint32_t msr, uint64_t val) {
50	uint32_t lo = (uint32_t)val;
51	uint32_t hi = (uint32_t)(val >> 32);
52	__asm__ volatile ("wrmsr" : : "a"(lo), "d"(hi), "c"(msr));
53	}
54
55	#endif /* _SYSCALL_H */
56