diff options
Diffstat (limited to 'newlib/libc/sys/h8300hms/read.c')
| -rw-r--r-- | newlib/libc/sys/h8300hms/read.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/newlib/libc/sys/h8300hms/read.c b/newlib/libc/sys/h8300hms/read.c new file mode 100644 index 000000000..ba6b9e929 --- /dev/null +++ b/newlib/libc/sys/h8300hms/read.c @@ -0,0 +1,27 @@ +#include "sys/syscall.h" + +int _read(file, ptr, len) + int file; + char *ptr; + int len; +{ + register int ret asm("r0") ; + + /* Type cast int as short so that we can copy int values into 16 bit + registers in case of -mint32 switch is given. + This is not going to affect data as file= 0 for stdin and len=1024 */ + + asm("mov.b %0, r0l":: "i" (SYS_read)) ; /* Syscall Number */ + asm("mov.w %0, r1" :: "r"((short)file) :"r1", "r2", "r3") ; + asm("mov.w %0, r3" :: "r"((short)len) :"r1", "r2", "r3") ; +#ifdef __H8300__ + asm("mov.w %0, r2" :: "r"(ptr) :"r1", "r2", "r3") ; +#else + asm("mov.l %0, er2" :: "r"(ptr) :"r1", "er2", "r3") ; +#endif + // This is magic trap similar to _write for simulator + asm("jsr @@0xc8") ; + return ret; +} + + |