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Newlib update

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This commit is contained in:
felsabbagh3 2020-03-30 23:08:38 -07:00
parent bcf894b581
commit ba8bc95c90
1 changed files with 59 additions and 56 deletions
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115
runtime/newlib/newlib.c
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@ -154,25 +154,26 @@ int _isatty (int file)
int _lseek(int fd, int offset, int whence) int _lseek(int fd, int offset, int whence)
{ {
// vx_print_str("Hello from _lseek\n"); // // vx_print_str("Hello from _lseek\n");
char * write_buffer = (char *) FILE_IO_WRITE; // char * write_buffer = (char *) FILE_IO_WRITE;
char * read_buffer = (char *) FILE_IO_READ; // char * read_buffer = (char *) FILE_IO_READ;
int cmd_id = LSEEK; // int cmd_id = LSEEK;
upload((char **) &write_buffer, (char *) &cmd_id , sizeof(int)); // upload((char **) &write_buffer, (char *) &cmd_id , sizeof(int));
upload((char **) &write_buffer, (char *) &fd , sizeof(int)); // upload((char **) &write_buffer, (char *) &fd , sizeof(int));
upload((char **) &write_buffer, (char *) &offset , sizeof(int)); // upload((char **) &write_buffer, (char *) &offset , sizeof(int));
upload((char **) &write_buffer, (char *) &whence , sizeof(int)); // upload((char **) &write_buffer, (char *) &whence , sizeof(int));
trap_to_simulator(); // trap_to_simulator();
int retval; // int retval;
download((char **) &read_buffer, (char *) &retval); // download((char **) &read_buffer, (char *) &retval);
return retval; // return retval;
return 0;
} }
@ -184,47 +185,48 @@ int _lseek(int fd, int offset, int whence)
int _read (int file, char *ptr, int len) int _read (int file, char *ptr, int len)
{ {
char * write_buffer = (char *) FILE_IO_WRITE; // char * write_buffer = (char *) FILE_IO_WRITE;
char * read_buffer = (char *) FILE_IO_READ; // char * read_buffer = (char *) FILE_IO_READ;
int cmd_id = READ; // int cmd_id = READ;
upload((char **) &write_buffer, (char *) &cmd_id, sizeof(int)); // upload((char **) &write_buffer, (char *) &cmd_id, sizeof(int));
upload((char **) &write_buffer, (char *) &file , sizeof(int)); // upload((char **) &write_buffer, (char *) &file , sizeof(int));
upload((char **) &write_buffer, (char *) &ptr , sizeof(int)); // upload((char **) &write_buffer, (char *) &ptr , sizeof(int));
upload((char **) &write_buffer, (char *) &len , sizeof(int)); // upload((char **) &write_buffer, (char *) &len , sizeof(int));
trap_to_simulator(); // trap_to_simulator();
return len; // return len;
return 0;
} }
int _write (int file, char *buf, int nbytes) int _write (int file, char *buf, int nbytes)
{ {
char * write_buffer = (char *) FILE_IO_WRITE; // char * write_buffer = (char *) FILE_IO_WRITE;
int cmd_id = WRITE; // int cmd_id = WRITE;
upload((char **) &write_buffer, (char *) &cmd_id, sizeof(int)); // upload((char **) &write_buffer, (char *) &cmd_id, sizeof(int));
upload((char **) &write_buffer, (char *) &file , sizeof(int)); // upload((char **) &write_buffer, (char *) &file , sizeof(int));
upload((char **) &write_buffer, (char *) buf , nbytes); // upload((char **) &write_buffer, (char *) buf , nbytes);
trap_to_simulator(); // trap_to_simulator();
// vx_print_str("Hello from _write\n"); // vx_print_str("Hello from _write\n");
// int i; int i;
// unsigned int volatile * const print_addr = (unsigned int *) 0x00010000; unsigned int volatile * const print_addr = (unsigned int *) 0x00010000;
// for (i = 0; i < nbytes; i++) for (i = 0; i < nbytes; i++)
// { {
// (*print_addr) = buf[i]; (*print_addr) = buf[i];
// } }
return nbytes; return nbytes;
@ -232,12 +234,12 @@ int _write (int file, char *buf, int nbytes)
static int heap_start = (int) 0x10000000; static int heap_start = (int) 0x30000000;
static int head_end = (int) 0x20000000; static int head_end = (int) 0x40000000;
void * _sbrk (int nbytes) void * _sbrk (int nbytes)
{ {
// vx_print_str("Hello from _sbrk\n"); vx_print_str("Hello from _sbrk\n");
// vx_printf("nbytes: ", nbytes); // vx_printf("nbytes: ", nbytes);
//if (nbytes < 0) //vx_print_str("nbytes less than zero\n"); //if (nbytes < 0) //vx_print_str("nbytes less than zero\n");
@ -250,10 +252,10 @@ void * _sbrk (int nbytes)
// vx_printf("New nbytes: ", nbytes); // vx_printf("New nbytes: ", nbytes);
// if (nbytes > 10240) if (nbytes > 10240)
// { {
// nbytes = 10240; nbytes = 10240;
// } }
// if (((unsigned) head_end) > ((unsigned) (heap_ptr + nbytes))) // if (((unsigned) head_end) > ((unsigned) (heap_ptr + nbytes)))
if (true) if (true)
@ -265,11 +267,11 @@ void * _sbrk (int nbytes)
// vx_print_str("\n"); // vx_print_str("\n");
return (void *) base; return (void *) base;
} }
else // else
{ // {
errno = ENOMEM; // errno = ENOMEM;
return (void *) -1; // return (void *) -1;
} // }
} /* _sbrk () */ } /* _sbrk () */
@ -282,24 +284,25 @@ void _exit(int val)
int _open(const char *name, int flags, int mode) int _open(const char *name, int flags, int mode)
{ {
char * write_buffer = (char *) FILE_IO_WRITE; // char * write_buffer = (char *) FILE_IO_WRITE;
char * read_buffer = (char *) FILE_IO_READ; // char * read_buffer = (char *) FILE_IO_READ;
int cmd_id = OPEN; // int cmd_id = OPEN;
upload((char **) &write_buffer, (char *) &cmd_id, sizeof(int)); // upload((char **) &write_buffer, (char *) &cmd_id, sizeof(int));
upload((char **) &write_buffer, (char *) &name , sizeof (char *)); // upload((char **) &write_buffer, (char *) &name , sizeof (char *));
upload((char **) &write_buffer, (char *) &flags , sizeof(int)); // upload((char **) &write_buffer, (char *) &flags , sizeof(int));
upload((char **) &write_buffer, (char *) & mode , sizeof(int)); // upload((char **) &write_buffer, (char *) & mode , sizeof(int));
trap_to_simulator(); // trap_to_simulator();
int fd; // int fd;
download((char **) &read_buffer, (char *) &fd); // download((char **) &read_buffer, (char *) &fd);
return fd; // return fd;
return 0;
} }