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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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