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/* 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 */
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