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/*
* Copyright (C) 2016 Andes Technology, Inc.
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
/*
* For nds32 ISA, the syscall number(SWID) shall be determined at compile time.
* (ex: asm("syscall SWID"); )
* If the value of syscall number is determined at run time, we shall issue
* this syscall through sys_syscall.
* (ex:
* asm("move $r0, SYSCALL_number"
* "syscall 0x5071");
* where 0x5071 is syscall number for sys_syscall
* )
*
* The following two macros are implemented according that syscall number
* is determined in compiler time or run time,
*
* 1. INTERNAL_SYSCALL_NCS: the syscall number is determined at run time
* 2. INTERNAL_SYSCALL: the syscall number is determined at compile time
*
*/
#ifndef _BITS_SYSCALLS_H
#define _BITS_SYSCALLS_H
#ifndef _SYSCALL_H
# error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead."
#endif
#ifndef __ASSEMBLER__
#include <errno.h>
#include <common/sysdep.h>
#define X(x) #x
#define Y(x) X(x)
#define LIB_SYSCALL __NR_syscall
#define __issue_syscall(syscall_name) \
" syscall " Y(syscall_name) "; \n"
#undef INTERNAL_SYSCALL_ERROR_P
#define INTERNAL_SYSCALL_ERROR_P(val, err) ((unsigned int) (val) >= 0xfffff001u)
#undef INTERNAL_SYSCALL_ERRNO
#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
#undef INLINE_SYSCALL
#define INLINE_SYSCALL(name, nr, args...) \
({ \
INTERNAL_SYSCALL_DECL (err); \
long result_var = INTERNAL_SYSCALL (name, err, nr, args); \
if (INTERNAL_SYSCALL_ERROR_P (result_var, err)) \
{ \
__set_errno (INTERNAL_SYSCALL_ERRNO (result_var, err)); \
result_var = -1 ; \
} \
result_var; \
})
#undef INTERNAL_SYSCALL_DECL
#define INTERNAL_SYSCALL_DECL(err) do { } while (0)
#undef INTERNAL_SYSCALL
#define INTERNAL_SYSCALL(name, err, nr, args...) internal_syscall##nr(__NR_##name, err, args)
/*
The _NCS variant allows non-constant syscall numbers
*/
#undef INTERNAL_SYSCALL_NCS
#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) internal_syscall_ncs##nr(name, err, args)
#define internal_syscall0(name, err, dummy...) \
({ \
register long ___res __asm__("$r0"); \
__asm__ volatile ( \
__issue_syscall (name) \
: "=r" (___res) /* output operands */ \
: \
: __SYSCALL_CLOBBERS); /* list of clobbered registers */ \
___res; \
})
#define internal_syscall1(name, err, arg1) \
({ \
register long ___res __asm__("$r0"); \
register long __arg1 __asm__("$r0") = (long) (arg1); \
__asm__ volatile ( \
__issue_syscall (name) \
: "=r" (___res) /* output operands */ \
: "r" (__arg1) /* input operands */ \
: __SYSCALL_CLOBBERS); /* list of clobbered registers */ \
___res; \
})
#define internal_syscall2(name, err, arg1, arg2) \
({ \
register long ___res __asm__("$r0"); \
register long __arg1 __asm__("$r0") = (long) (arg1); \
register long __arg2 __asm__("$r1") = (long) (arg2); \
__asm__ volatile ( \
__issue_syscall (name) \
: "=r" (___res) /* output operands */ \
: "r" (__arg1) /* input operands */ \
, "r" (__arg2) /* input operands */ \
: __SYSCALL_CLOBBERS); /* list of clobbered registers */ \
___res; \
})
#define internal_syscall3(name, err, arg1, arg2, arg3) \
({ \
register long ___res __asm__("$r0"); \
register long __arg1 __asm__("$r0") = (long) (arg1); \
register long __arg2 __asm__("$r1") = (long) (arg2); \
register long __arg3 __asm__("$r2") = (long) (arg3); \
__asm__ volatile ( \
__issue_syscall (name) \
: "=r" (___res) /* output operands */ \
: "r" (__arg1) /* input operands */ \
, "r" (__arg2) /* input operands */ \
, "r" (__arg3) /* input operands */ \
: __SYSCALL_CLOBBERS); /* list of clobbered registers */ \
___res; \
})
#define internal_syscall4(name, err, arg1, arg2, arg3, arg4) \
({ \
register long ___res __asm__("$r0"); \
register long __arg1 __asm__("$r0") = (long) (arg1); \
register long __arg2 __asm__("$r1") = (long) (arg2); \
register long __arg3 __asm__("$r2") = (long) (arg3); \
register long __arg4 __asm__("$r3") = (long) (arg4); \
__asm__ volatile ( \
__issue_syscall (name) \
: "=r" (___res) /* output operands */ \
: "r" (__arg1) /* input operands */ \
, "r" (__arg2) /* input operands */ \
, "r" (__arg3) /* input operands */ \
, "r" (__arg4) /* input operands */ \
: __SYSCALL_CLOBBERS); /* list of clobbered registers */ \
___res; \
})
#define internal_syscall5(name, err, arg1, arg2, arg3, arg4, arg5) \
({ \
register long ___res __asm__("$r0"); \
register long __arg1 __asm__("$r0") = (long) (arg1); \
register long __arg2 __asm__("$r1") = (long) (arg2); \
register long __arg3 __asm__("$r2") = (long) (arg3); \
register long __arg4 __asm__("$r3") = (long) (arg4); \
register long __arg5 __asm__("$r4") = (long) (arg5); \
__asm__ volatile ( \
__issue_syscall (name) \
: "=r" (___res) /* output operands */ \
: "r" (__arg1) /* input operands */ \
, "r" (__arg2) /* input operands */ \
, "r" (__arg3) /* input operands */ \
, "r" (__arg4) /* input operands */ \
, "r" (__arg5) /* input operands */ \
: __SYSCALL_CLOBBERS); /* list of clobbered registers */ \
___res; \
})
#define internal_syscall6(name, err, arg1, arg2, arg3, arg4, arg5, arg6) \
({ \
register long ___res __asm__("$r0"); \
register long __arg1 __asm__("$r0") = (long) (arg1); \
register long __arg2 __asm__("$r1") = (long) (arg2); \
register long __arg3 __asm__("$r2") = (long) (arg3); \
register long __arg4 __asm__("$r3") = (long) (arg4); \
register long __arg5 __asm__("$r4") = (long) (arg5); \
register long __arg6 __asm__("$r5") = (long) (arg6); \
__asm__ volatile ( \
__issue_syscall (name) \
: "=r" (___res) /* output operands */ \
: "r" (__arg1) /* input operands */ \
, "r" (__arg2) /* input operands */ \
, "r" (__arg3) /* input operands */ \
, "r" (__arg4) /* input operands */ \
, "r" (__arg5) /* input operands */ \
, "r" (__arg6) /* input operands */ \
: __SYSCALL_CLOBBERS); /* list of clobbered registers */ \
___res; \
})
#define internal_syscall7(name, err, arg1, arg2, arg3, arg4, arg5, arg6, arg7) \
({ \
register long ___res __asm__("$r0"); \
register long __arg1 __asm__("$r0") = (long) (arg1); \
register long __arg2 __asm__("$r1") = (long) (arg2); \
register long __arg3 __asm__("$r2") = (long) (arg3); \
register long __arg4 __asm__("$r3") = (long) (arg4); \
register long __arg5 __asm__("$r4") = (long) (arg5); \
register long __arg6 __asm__("$r5") = (long) (arg6); \
__asm__ volatile ( \
"addi10.sp\t #-4\n\t" \
CFI_ADJUST_CFA_OFFSET(4)"\n\t" \
"push\t %7\n\t" \
CFI_ADJUST_CFA_OFFSET(4)"\n\t" \
__issue_syscall (name) \
"addi10.sp\t #4\n\t" \
CFI_ADJUST_CFA_OFFSET(-4)"\n\t" \
"pop\t %7\n\t" \
CFI_ADJUST_CFA_OFFSET(-4)"\n\t" \
: "=r" (___res) /* output operands */ \
: "r" (__arg1) /* input operands */ \
, "r" (__arg2) /* input operands */ \
, "r" (__arg3) /* input operands */ \
, "r" (__arg4) /* input operands */ \
, "r" (__arg5) /* input operands */ \
, "r" (__arg6) /* input operands */ \
, "r" (arg7) /* input operands */ \
: __SYSCALL_CLOBBERS); /* list of clobbered registers */ \
___res; \
})
#define internal_syscall_ncs0(name, err, dummy...) \
({ \
register long __res __asm__("$r0"); \
register long __no __asm__("$r0") = (long) (name); \
__asm__ volatile ( \
__issue_syscall (LIB_SYSCALL) \
: "=r" (__res) /* output operands */ \
: "r" (__no) /* input operands */ \
: __SYSCALL_CLOBBERS); /* list of clobbered registers */ \
__res; \
})
#define internal_syscall_ncs1(name, err, arg1) \
({ \
register long __res __asm__("$r0"); \
register long __no __asm__("$r0") = (long) (name); \
register long __arg1 __asm__("$r1") = (long) (arg1); \
__asm__ volatile ( \
__issue_syscall (LIB_SYSCALL) \
: "=r" (__res) /* output operands */ \
: "r" (__arg1) /* input operands */ \
, "r" (__no) /* input operands */ \
: __SYSCALL_CLOBBERS); /* list of clobbered registers */ \
__res; \
})
#define internal_syscall_ncs2(name, err, arg1, arg2) \
({ \
register long __res __asm__("$r0"); \
register long __no __asm__("$r0") = (long) (name); \
register long __arg1 __asm__("$r1") = (long) (arg1); \
register long __arg2 __asm__("$r2") = (long) (arg2); \
__asm__ volatile ( \
__issue_syscall (LIB_SYSCALL) \
: "=r" (__res) /* output operands */ \
: "r" (__arg1) /* input operands */ \
, "r" (__arg2) /* input operands */ \
, "r" (__no) /* input operands */ \
: __SYSCALL_CLOBBERS); /* list of clobbered registers */ \
__res; \
})
#define internal_syscall_ncs3(name, err, arg1, arg2, arg3) \
({ \
register long __res __asm__("$r0"); \
register long __no __asm__("$r0") = (long) (name); \
register long __arg1 __asm__("$r1") = (long) (arg1); \
register long __arg2 __asm__("$r2") = (long) (arg2); \
register long __arg3 __asm__("$r3") = (long) (arg3); \
__asm__ volatile ( \
__issue_syscall (LIB_SYSCALL) \
: "=r" (__res) /* output operands */ \
: "r" (__arg1) /* input operands */ \
, "r" (__arg2) /* input operands */ \
, "r" (__arg3) /* input operands */ \
, "r" (__no) /* input operands */ \
: __SYSCALL_CLOBBERS); /* list of clobbered registers */ \
__res; \
})
#define internal_syscall_ncs4(name, err, arg1, arg2, arg3, arg4) \
({ \
register long __res __asm__("$r0"); \
register long __no __asm__("$r0") = (long) (name); \
register long __arg1 __asm__("$r1") = (long) (arg1); \
register long __arg2 __asm__("$r2") = (long) (arg2); \
register long __arg3 __asm__("$r3") = (long) (arg3); \
register long __arg4 __asm__("$r4") = (long) (arg4); \
__asm__ volatile ( \
__issue_syscall (LIB_SYSCALL) \
: "=r" (__res) /* output operands */ \
: "r" (__arg1) /* input operands */ \
, "r" (__arg2) /* input operands */ \
, "r" (__arg3) /* input operands */ \
, "r" (__arg4) /* input operands */ \
, "r" (__no) /* input operands */ \
: __SYSCALL_CLOBBERS); /* list of clobbered registers */ \
__res; \
})
#define internal_syscall_ncs5(name, err, arg1, arg2, arg3, arg4, arg5) \
({ \
register long ___res __asm__("$r0"); \
register long __no __asm__("$r0") = (long) (name); \
register long __arg1 __asm__("$r1") = (long) (arg1); \
register long __arg2 __asm__("$r2") = (long) (arg2); \
register long __arg3 __asm__("$r3") = (long) (arg3); \
register long __arg4 __asm__("$r4") = (long) (arg4); \
register long __arg5 __asm__("$r5") = (long) (arg5); \
__asm__ volatile ( \
__issue_syscall (LIB_SYSCALL) \
: "=r" (___res) /* output operands */ \
: "r" (__arg1) /* input operands */ \
, "r" (__arg2) /* input operands */ \
, "r" (__arg3) /* input operands */ \
, "r" (__arg4) /* input operands */ \
, "r" (__arg5) /* input operands */ \
: __SYSCALL_CLOBBERS); /* list of clobbered registers */ \
___res; \
})
#define internal_syscall_ncs6(name, err, arg1, arg2, arg3, arg4, arg5, arg6) \
({ \
register long __res __asm__("$r0"); \
register long __no __asm__("$r0") = (long) (name); \
register long __arg1 __asm__("$r1") = (long) (arg1); \
register long __arg2 __asm__("$r2") = (long) (arg2); \
register long __arg3 __asm__("$r3") = (long) (arg3); \
register long __arg4 __asm__("$r4") = (long) (arg4); \
register long __arg5 __asm__("$r5") = (long) (arg5); \
__asm__ volatile ( \
"addi10.sp\t #-4\n\t" \
CFI_ADJUST_CFA_OFFSET(4)"\n\t" \
"push\t %7\n\t" \
CFI_ADJUST_CFA_OFFSET(4)"\n\t" \
__issue_syscall (LIB_SYSCALL) \
"pop\t %7\n\t" \
CFI_ADJUST_CFA_OFFSET(-4)"\n\t" \
"addi10.sp\t #4\n\t" \
CFI_ADJUST_CFA_OFFSET(-4)"\n\t" \
: "=r" (__res) /* output operands */ \
: "r" (__no) /* input operands */ \
, "r" (__arg1) /* input operands */ \
, "r" (__arg2) /* input operands */ \
, "r" (__arg3) /* input operands */ \
, "r" (__arg4) /* input operands */ \
, "r" (__arg5) /* input operands */ \
, "r" (arg6) /* input operands */ \
: __SYSCALL_CLOBBERS); /* list of clobbered registers */ \
__res; \
})
#define __SYSCALL_CLOBBERS "$lp", "memory"
#endif /* ! __ASSEMBLER__ */
#endif /* _BITS_SYSCALLS_H */
|
