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[/] [openrisc/] [tags/] [gnu-src/] [newlib-1.18.0/] [newlib-1.18.0-or32-1.0rc2/] [newlib/] [libc/] [sys/] [z8ksim/] [glue.c] - Rev 753
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#include "sys/syscall.h" #include <sys/types.h> #include <sys/stat.h> #include <_ansi.h> #include <errno.h> extern char _start_heap; extern char _end_heap; extern char _start_bss; extern char _end_bss; static int argl(long value) { asm("ld r0,%H0" : : "r" (value)); asm("ld r1,%I0" : : "r" (value)); asm("sc %0" : : "i" (SYS_ARG)); } static int argw(value) { asm("ld r1,%H0" : : "r" ( value)); asm("ld r0,#0"); asm("sc %0" : : "i" (SYS_ARG)); } static int argp(void *value) { #ifdef __Z8001__ asm("ld r0,%H0" : : "r" (value)); asm("ld r1,%I0" : : "r" (value)); #else asm("ld r1,%H0" : : "r" ( value)); asm("ld r0,#0"); #endif asm("sc %0" : : "i" (SYS_ARG)); } #define ARGL(n, value) argl(value) #define ARGW(n, value) argw(value) #define ARGP(n, value) argp(value) #define MACRO(n) asm("sc %0" : : "i" (n)); int _read (int fd, char *buf,size_t nbytes) { ARGW(0,fd); ARGP(1,buf); ARGP(2,(void *)(nbytes)); MACRO(SYS_read); } int _write (int fd, char *buf, size_t nbytes) { ARGW(0,fd); ARGP(1,buf); ARGP(2,(void *)(nbytes)); MACRO(SYS_write); } int _open (const char *buf, int flags, int mode) { ARGP(0, buf); ARGW(1, flags); ARGW(2, mode); MACRO(SYS_open); } int _close (int fd) { ARGW(0,fd); MACRO(SYS_close ); } /* * sbrk -- changes heap size size. Get nbytes more * RAM. We just increment a pointer in what's * left of memory on the board. */ caddr_t _sbrk (size_t nbytes) { static char* heap_ptr = NULL; caddr_t base; if (heap_ptr == NULL) { heap_ptr = (caddr_t)&_start_heap; } if (heap_ptr + nbytes < &_end_heap) { base = heap_ptr; heap_ptr += nbytes; return (heap_ptr); } else { errno = ENOMEM; return ((caddr_t)-1); } } int isatty (int fd) { ARGW(0,fd); MACRO(SYS_isatty); } off_t _lseek (int fd, off_t offset, int whence) { ARGW(0,fd); ARGL(1,offset); ARGW(2, whence); MACRO(SYS_lseek); } int _fstat (int fd, struct stat *buf) { ARGW(0,fd); ARGP(1,buf); MACRO(SYS_fstat); } int _exit(int val) { ARGW(0,val); MACRO(SYS_exit); } time_t _time(time_t *timer) { ARGP(0,timer); MACRO(SYS_time); } int _creat (const char *path, int mode) { ARGP(0, path); ARGW(1, mode); MACRO(SYS_creat); } _kill(int pid, int val) { _exit(val); } _getpid() { return 1; }
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