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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2018 Kalray Inc.
*/
#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__
#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
({ \
register long _ret __asm__("r0"); \
register unsigned long _scno __asm__("r6") = name; \
LOAD_ARGS_##nr (args) \
__asm__ __volatile__("scall %[r_scno]" \
: "=r" (_ret) \
: [r_scno] "r" (_scno) ASM_ARGS_##nr \
: ASM_CLOBBER_##nr); \
_ret; \
})
/* Mark all argument registers as per ABI in the range r1-r5 as
clobbered when they are not used for the invocation of the scall */
#define ASM_CLOBBER_6 "cc", "memory", \
"r7", "r8", "r9", "r10", "r11", /* unused argument registers */ \
"r15", /* struct pointer */ \
"r16", "r17", /* veneer registers */ \
"r32", "r33", "r34", "r35", "r36", "r37", "r38", "r39", /* 32->63 are caller-saved */ \
"r40", "r41", "r42", "r43", "r44", "r45", "r46", "r47", \
"r48", "r49", "r50", "r51", "r52", "r53", "r54", "r55", \
"r56", "r57", "r58", "r59", "r60", "r61", "r62", "r63"
#define ASM_CLOBBER_5 "r5", ASM_CLOBBER_6
#define ASM_CLOBBER_4 "r4", ASM_CLOBBER_5
#define ASM_CLOBBER_3 "r3", ASM_CLOBBER_4
#define ASM_CLOBBER_2 "r2", ASM_CLOBBER_3
#define ASM_CLOBBER_1 "r1", ASM_CLOBBER_2
#define ASM_CLOBBER_0 ASM_CLOBBER_1
#define LOAD_ARGS_0()
#define ASM_ARGS_0
#define LOAD_ARGS_1(a1) \
LOAD_ARGS_0(); \
_ret = (long) a1;
#define ASM_ARGS_1 ASM_ARGS_0, "r"(_ret)
#define LOAD_ARGS_2(a1, a2) \
LOAD_ARGS_1(a1); \
register long _a2 __asm__("r1") = (long) a2;
#define ASM_ARGS_2 ASM_ARGS_1, "r"(_a2)
#define LOAD_ARGS_3(a1, a2, a3) \
LOAD_ARGS_2(a1, a2); \
register long _a3 __asm__("r2") = (long) a3;
#define ASM_ARGS_3 ASM_ARGS_2, "r"(_a3)
#define LOAD_ARGS_4(a1, a2, a3, a4) \
LOAD_ARGS_3(a1, a2, a3); \
register long _a4 __asm__("r3") = (long) a4;
#define ASM_ARGS_4 ASM_ARGS_3, "r"(_a4)
#define LOAD_ARGS_5(a1, a2, a3, a4, a5) \
LOAD_ARGS_4(a1, a2, a3, a4); \
register long _a5 __asm__("r4") = (long) a5;
#define ASM_ARGS_5 ASM_ARGS_4, "r"(_a5)
#define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \
LOAD_ARGS_5(a1, a2, a3, a4, a5); \
register long _a6 __asm__("r5") = (long) a6;
#define ASM_ARGS_6 ASM_ARGS_5, "r"(_a6)
#endif /* __ASSEMBLER__ */
#endif /* _BITS_SYSCALLS_H */
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