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| 1 | /* SPDX-License-Identifier: LGPL-2.1 OR MIT */ |
|---|---|
| 2 | /* |
| 3 | * m68k specific definitions for NOLIBC |
| 4 | * Copyright (C) 2025 Daniel Palmer<daniel@thingy.jp> |
| 5 | * |
| 6 | * Roughly based on one or more of the other arch files. |
| 7 | * |
| 8 | */ |
| 9 | |
| 10 | #ifndef _NOLIBC_ARCH_M68K_H |
| 11 | #define _NOLIBC_ARCH_M68K_H |
| 12 | |
| 13 | #include "compiler.h" |
| 14 | #include "crt.h" |
| 15 | |
| 16 | #define _NOLIBC_SYSCALL_CLOBBERLIST "memory" |
| 17 | |
| 18 | #define my_syscall0(num) \ |
| 19 | ({ \ |
| 20 | register long _num __asm__ ("d0") = (num); \ |
| 21 | \ |
| 22 | __asm__ volatile ( \ |
| 23 | "trap #0\n" \ |
| 24 | : "+r"(_num) \ |
| 25 | : "r"(_num) \ |
| 26 | : _NOLIBC_SYSCALL_CLOBBERLIST \ |
| 27 | ); \ |
| 28 | _num; \ |
| 29 | }) |
| 30 | |
| 31 | #define my_syscall1(num, arg1) \ |
| 32 | ({ \ |
| 33 | register long _num __asm__ ("d0") = (num); \ |
| 34 | register long _arg1 __asm__ ("d1") = (long)(arg1); \ |
| 35 | \ |
| 36 | __asm__ volatile ( \ |
| 37 | "trap #0\n" \ |
| 38 | : "+r"(_num) \ |
| 39 | : "r"(_arg1) \ |
| 40 | : _NOLIBC_SYSCALL_CLOBBERLIST \ |
| 41 | ); \ |
| 42 | _num; \ |
| 43 | }) |
| 44 | |
| 45 | #define my_syscall2(num, arg1, arg2) \ |
| 46 | ({ \ |
| 47 | register long _num __asm__ ("d0") = (num); \ |
| 48 | register long _arg1 __asm__ ("d1") = (long)(arg1); \ |
| 49 | register long _arg2 __asm__ ("d2") = (long)(arg2); \ |
| 50 | \ |
| 51 | __asm__ volatile ( \ |
| 52 | "trap #0\n" \ |
| 53 | : "+r"(_num) \ |
| 54 | : "r"(_arg1), "r"(_arg2) \ |
| 55 | : _NOLIBC_SYSCALL_CLOBBERLIST \ |
| 56 | ); \ |
| 57 | _num; \ |
| 58 | }) |
| 59 | |
| 60 | #define my_syscall3(num, arg1, arg2, arg3) \ |
| 61 | ({ \ |
| 62 | register long _num __asm__ ("d0") = (num); \ |
| 63 | register long _arg1 __asm__ ("d1") = (long)(arg1); \ |
| 64 | register long _arg2 __asm__ ("d2") = (long)(arg2); \ |
| 65 | register long _arg3 __asm__ ("d3") = (long)(arg3); \ |
| 66 | \ |
| 67 | __asm__ volatile ( \ |
| 68 | "trap #0\n" \ |
| 69 | : "+r"(_num) \ |
| 70 | : "r"(_arg1), "r"(_arg2), "r"(_arg3) \ |
| 71 | : _NOLIBC_SYSCALL_CLOBBERLIST \ |
| 72 | ); \ |
| 73 | _num; \ |
| 74 | }) |
| 75 | |
| 76 | #define my_syscall4(num, arg1, arg2, arg3, arg4) \ |
| 77 | ({ \ |
| 78 | register long _num __asm__ ("d0") = (num); \ |
| 79 | register long _arg1 __asm__ ("d1") = (long)(arg1); \ |
| 80 | register long _arg2 __asm__ ("d2") = (long)(arg2); \ |
| 81 | register long _arg3 __asm__ ("d3") = (long)(arg3); \ |
| 82 | register long _arg4 __asm__ ("d4") = (long)(arg4); \ |
| 83 | \ |
| 84 | __asm__ volatile ( \ |
| 85 | "trap #0\n" \ |
| 86 | : "+r" (_num) \ |
| 87 | : "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4) \ |
| 88 | : _NOLIBC_SYSCALL_CLOBBERLIST \ |
| 89 | ); \ |
| 90 | _num; \ |
| 91 | }) |
| 92 | |
| 93 | #define my_syscall5(num, arg1, arg2, arg3, arg4, arg5) \ |
| 94 | ({ \ |
| 95 | register long _num __asm__ ("d0") = (num); \ |
| 96 | register long _arg1 __asm__ ("d1") = (long)(arg1); \ |
| 97 | register long _arg2 __asm__ ("d2") = (long)(arg2); \ |
| 98 | register long _arg3 __asm__ ("d3") = (long)(arg3); \ |
| 99 | register long _arg4 __asm__ ("d4") = (long)(arg4); \ |
| 100 | register long _arg5 __asm__ ("d5") = (long)(arg5); \ |
| 101 | \ |
| 102 | __asm__ volatile ( \ |
| 103 | "trap #0\n" \ |
| 104 | : "+r" (_num) \ |
| 105 | : "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5) \ |
| 106 | : _NOLIBC_SYSCALL_CLOBBERLIST \ |
| 107 | ); \ |
| 108 | _num; \ |
| 109 | }) |
| 110 | |
| 111 | #define my_syscall6(num, arg1, arg2, arg3, arg4, arg5, arg6) \ |
| 112 | ({ \ |
| 113 | register long _num __asm__ ("d0") = (num); \ |
| 114 | register long _arg1 __asm__ ("d1") = (long)(arg1); \ |
| 115 | register long _arg2 __asm__ ("d2") = (long)(arg2); \ |
| 116 | register long _arg3 __asm__ ("d3") = (long)(arg3); \ |
| 117 | register long _arg4 __asm__ ("d4") = (long)(arg4); \ |
| 118 | register long _arg5 __asm__ ("d5") = (long)(arg5); \ |
| 119 | register long _arg6 __asm__ ("a0") = (long)(arg6); \ |
| 120 | \ |
| 121 | __asm__ volatile ( \ |
| 122 | "trap #0\n" \ |
| 123 | : "+r" (_num) \ |
| 124 | : "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), \ |
| 125 | "r"(_arg6) \ |
| 126 | : _NOLIBC_SYSCALL_CLOBBERLIST \ |
| 127 | ); \ |
| 128 | _num; \ |
| 129 | }) |
| 130 | |
| 131 | void _start(void); |
| 132 | void __attribute__((weak, noreturn)) __nolibc_entrypoint __no_stack_protector _start(void) |
| 133 | { |
| 134 | __asm__ volatile ( |
| 135 | "movel %sp, %sp@-\n" |
| 136 | "jsr _start_c\n" |
| 137 | ); |
| 138 | __nolibc_entrypoint_epilogue(); |
| 139 | } |
| 140 | |
| 141 | #endif /* _NOLIBC_ARCH_M68K_H */ |
| 142 |
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