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Diffstat (limited to 'newlib/libc/sys/mmixware/syscall.h')
| -rw-r--r-- | newlib/libc/sys/mmixware/syscall.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/newlib/libc/sys/mmixware/syscall.h b/newlib/libc/sys/mmixware/syscall.h new file mode 100644 index 000000000..e639ba2c0 --- /dev/null +++ b/newlib/libc/sys/mmixware/syscall.h @@ -0,0 +1,138 @@ +/* syscall defines for MMIXware. + + Copyright (C) 2001 Hans-Peter Nilsson. + + Permission to use, copy, modify, and distribute this software is freely + granted, provided that this notice is preserved with no changes. + THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + PURPOSE. */ + +/* These are the mmixware simulator calls that are of use in newlib. */ + +#define SYS_halt 0 +#define SYS_Fopen 1 +#define SYS_Fclose 2 +#define SYS_Fread 3 +#define SYS_Fwrite 6 +#define SYS_Fseek 9 +#define SYS_Ftell 10 + + +enum MMIX_filemode + { + TextRead = 0, + TextWrite = 1, + BinaryRead = 2, + BinaryWrite = 3, + BinaryReadWrite = 4 + }; + +#define N_MMIX_FILEHANDLES 32 + +/* We store a bitmap of allocated filehandles + _MMIX_allocated_filehandle[fileno] in an array. There are 32 of them. + Indexes 0, 1 and 2 are allocated from start. The reason we keep track + of them is that *we* have to allocate a filehandle when opening a file. + Had we got a filehandle from the simulator, we wouldn't have to keep + track of it. A value of 0 denotes a free handle. */ +extern unsigned char _MMIX_allocated_filehandle[N_MMIX_FILEHANDLES]; + +/* We use this file-handle number as a temporary; not used by usual file + I/O. */ +#define TMPFNO 127 + +/* Simulator call with one argument. Also used for zero-argument calls; + pass a zero as ARG1. */ +#define TRAP1i(FUN, ARG1) \ + ({ long ret_; \ + __asm__ ("TRAP 0,%1,%2\n\tSET %0,$255" \ + : "=r" (ret_) : "i" (FUN), "i" (ARG1) \ + : "memory"); \ + ret_; \ + }) + +/* Helper macros to cope with the file-handle parameter to the simulator + being *constant*. We support up to 32 simultaneously open files. */ +#define I3f(FUN, ARG1, N, ARGS) \ + if (ARG1 == N) \ + __asm__ ("SET $255,%3\n\tTRAP 0,%1,%2\n\tSET %0,$255" \ + : "=r" (ret_) : "i" (FUN), "i" (N), "r" (ARGS) \ + : "memory") + +/* Using if:s rather than switches to help GCC optimize the rest away. */ +#define DO32(FUN, ARG1, ARGS) \ + I3f (FUN, ARG1, 0, ARGS); \ + else I3f (FUN, ARG1, 1, ARGS); \ + else I3f (FUN, ARG1, 2, ARGS); \ + else I3f (FUN, ARG1, 3, ARGS); \ + else I3f (FUN, ARG1, 4, ARGS); \ + else I3f (FUN, ARG1, 5, ARGS); \ + else I3f (FUN, ARG1, 6, ARGS); \ + else I3f (FUN, ARG1, 7, ARGS); \ + else I3f (FUN, ARG1, 8, ARGS); \ + else I3f (FUN, ARG1, 9, ARGS); \ + else I3f (FUN, ARG1, 10, ARGS); \ + else I3f (FUN, ARG1, 11, ARGS); \ + else I3f (FUN, ARG1, 12, ARGS); \ + else I3f (FUN, ARG1, 13, ARGS); \ + else I3f (FUN, ARG1, 14, ARGS); \ + else I3f (FUN, ARG1, 15, ARGS); \ + else I3f (FUN, ARG1, 16, ARGS); \ + else I3f (FUN, ARG1, 17, ARGS); \ + else I3f (FUN, ARG1, 18, ARGS); \ + else I3f (FUN, ARG1, 19, ARGS); \ + else I3f (FUN, ARG1, 20, ARGS); \ + else I3f (FUN, ARG1, 21, ARGS); \ + else I3f (FUN, ARG1, 22, ARGS); \ + else I3f (FUN, ARG1, 23, ARGS); \ + else I3f (FUN, ARG1, 24, ARGS); \ + else I3f (FUN, ARG1, 25, ARGS); \ + else I3f (FUN, ARG1, 26, ARGS); \ + else I3f (FUN, ARG1, 27, ARGS); \ + else I3f (FUN, ARG1, 28, ARGS); \ + else I3f (FUN, ARG1, 29, ARGS); \ + else I3f (FUN, ARG1, 30, ARGS); \ + else I3f (FUN, ARG1, 31, ARGS); \ + else \ + { \ + errno = EBADF; \ + return -1; \ + } + +#define TRAP1f(FUN, ARG1) \ + ({ long ret_; \ + DO32 (FUN, ARG1, 0); \ + ret_; \ + }) + +#define TRAP2f(FUN, ARG1, ARG2) \ + ({ long ret_; \ + DO32 (FUN, ARG1, ARG2); \ + ret_; \ + }) + +#define TRAP3f(FUN, ARG1, ARG2, ARG3) \ + ({ long ret_; \ + unsigned long args_[] \ + = { (unsigned long) (ARG2), (unsigned long) (ARG3) }; \ + DO32 (FUN, ARG1, args_); \ + ret_; \ + }) + +#ifndef __GNUC__ +/* Probably will not happen. Nevertheless... */ +# define UNIMPLEMENTED(MSG) +#else +# define UNIMPLEMENTED(MSG) UNIMPLEMENTEDi MSG +# define UNIMPLEMENTEDi(MSG, ARGS...) \ + do { \ + char buf[2000]; \ + sprintf (buf, "UNIMPLEMENTED %s in %s\n", __FUNCTION__, __FILE__); \ + write (2, buf, strlen (buf)); \ + sprintf (buf, MSG , ##ARGS); \ + write (2, buf, strlen (buf)); \ + write (2, "\n", 1); \ + } while (0) +#endif |