mirror of https://github.com/torvalds/linux.git
142 lines
7.2 KiB
C
142 lines
7.2 KiB
C
/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
|
|
/*
|
|
* m68k specific definitions for NOLIBC
|
|
* Copyright (C) 2025 Daniel Palmer<daniel@thingy.jp>
|
|
*
|
|
* Roughly based on one or more of the other arch files.
|
|
*
|
|
*/
|
|
|
|
#ifndef _NOLIBC_ARCH_M68K_H
|
|
#define _NOLIBC_ARCH_M68K_H
|
|
|
|
#include "compiler.h"
|
|
#include "crt.h"
|
|
|
|
#define _NOLIBC_SYSCALL_CLOBBERLIST "memory"
|
|
|
|
#define my_syscall0(num) \
|
|
({ \
|
|
register long _num __asm__ ("d0") = (num); \
|
|
\
|
|
__asm__ volatile ( \
|
|
"trap #0\n" \
|
|
: "+r"(_num) \
|
|
: "r"(_num) \
|
|
: _NOLIBC_SYSCALL_CLOBBERLIST \
|
|
); \
|
|
_num; \
|
|
})
|
|
|
|
#define my_syscall1(num, arg1) \
|
|
({ \
|
|
register long _num __asm__ ("d0") = (num); \
|
|
register long _arg1 __asm__ ("d1") = (long)(arg1); \
|
|
\
|
|
__asm__ volatile ( \
|
|
"trap #0\n" \
|
|
: "+r"(_num) \
|
|
: "r"(_arg1) \
|
|
: _NOLIBC_SYSCALL_CLOBBERLIST \
|
|
); \
|
|
_num; \
|
|
})
|
|
|
|
#define my_syscall2(num, arg1, arg2) \
|
|
({ \
|
|
register long _num __asm__ ("d0") = (num); \
|
|
register long _arg1 __asm__ ("d1") = (long)(arg1); \
|
|
register long _arg2 __asm__ ("d2") = (long)(arg2); \
|
|
\
|
|
__asm__ volatile ( \
|
|
"trap #0\n" \
|
|
: "+r"(_num) \
|
|
: "r"(_arg1), "r"(_arg2) \
|
|
: _NOLIBC_SYSCALL_CLOBBERLIST \
|
|
); \
|
|
_num; \
|
|
})
|
|
|
|
#define my_syscall3(num, arg1, arg2, arg3) \
|
|
({ \
|
|
register long _num __asm__ ("d0") = (num); \
|
|
register long _arg1 __asm__ ("d1") = (long)(arg1); \
|
|
register long _arg2 __asm__ ("d2") = (long)(arg2); \
|
|
register long _arg3 __asm__ ("d3") = (long)(arg3); \
|
|
\
|
|
__asm__ volatile ( \
|
|
"trap #0\n" \
|
|
: "+r"(_num) \
|
|
: "r"(_arg1), "r"(_arg2), "r"(_arg3) \
|
|
: _NOLIBC_SYSCALL_CLOBBERLIST \
|
|
); \
|
|
_num; \
|
|
})
|
|
|
|
#define my_syscall4(num, arg1, arg2, arg3, arg4) \
|
|
({ \
|
|
register long _num __asm__ ("d0") = (num); \
|
|
register long _arg1 __asm__ ("d1") = (long)(arg1); \
|
|
register long _arg2 __asm__ ("d2") = (long)(arg2); \
|
|
register long _arg3 __asm__ ("d3") = (long)(arg3); \
|
|
register long _arg4 __asm__ ("d4") = (long)(arg4); \
|
|
\
|
|
__asm__ volatile ( \
|
|
"trap #0\n" \
|
|
: "+r" (_num) \
|
|
: "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4) \
|
|
: _NOLIBC_SYSCALL_CLOBBERLIST \
|
|
); \
|
|
_num; \
|
|
})
|
|
|
|
#define my_syscall5(num, arg1, arg2, arg3, arg4, arg5) \
|
|
({ \
|
|
register long _num __asm__ ("d0") = (num); \
|
|
register long _arg1 __asm__ ("d1") = (long)(arg1); \
|
|
register long _arg2 __asm__ ("d2") = (long)(arg2); \
|
|
register long _arg3 __asm__ ("d3") = (long)(arg3); \
|
|
register long _arg4 __asm__ ("d4") = (long)(arg4); \
|
|
register long _arg5 __asm__ ("d5") = (long)(arg5); \
|
|
\
|
|
__asm__ volatile ( \
|
|
"trap #0\n" \
|
|
: "+r" (_num) \
|
|
: "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5) \
|
|
: _NOLIBC_SYSCALL_CLOBBERLIST \
|
|
); \
|
|
_num; \
|
|
})
|
|
|
|
#define my_syscall6(num, arg1, arg2, arg3, arg4, arg5, arg6) \
|
|
({ \
|
|
register long _num __asm__ ("d0") = (num); \
|
|
register long _arg1 __asm__ ("d1") = (long)(arg1); \
|
|
register long _arg2 __asm__ ("d2") = (long)(arg2); \
|
|
register long _arg3 __asm__ ("d3") = (long)(arg3); \
|
|
register long _arg4 __asm__ ("d4") = (long)(arg4); \
|
|
register long _arg5 __asm__ ("d5") = (long)(arg5); \
|
|
register long _arg6 __asm__ ("a0") = (long)(arg6); \
|
|
\
|
|
__asm__ volatile ( \
|
|
"trap #0\n" \
|
|
: "+r" (_num) \
|
|
: "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), \
|
|
"r"(_arg6) \
|
|
: _NOLIBC_SYSCALL_CLOBBERLIST \
|
|
); \
|
|
_num; \
|
|
})
|
|
|
|
void _start(void);
|
|
void __attribute__((weak, noreturn)) __nolibc_entrypoint __no_stack_protector _start(void)
|
|
{
|
|
__asm__ volatile (
|
|
"movel %sp, %sp@-\n"
|
|
"jsr _start_c\n"
|
|
);
|
|
__nolibc_entrypoint_epilogue();
|
|
}
|
|
|
|
#endif /* _NOLIBC_ARCH_M68K_H */
|