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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.17.0/] [libgloss/] [xstormy16/] [eva_app.c] - Blame information for rev 179

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Line No. Rev Author Line
1 148 jeremybenn
/* eva_app.c -- Glue code for linking apps to run under GDB debugger control.
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 *
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 * Copyright (c) 2001 Red Hat, Inc.
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 *
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 * The authors hereby grant permission to use, copy, modify, distribute,
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 * and license this software and its documentation for any purpose, provided
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 * that existing copyright notices are retained in all copies and that this
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 * notice is included verbatim in any distributions. No written agreement,
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 * license, or royalty fee is required for any of the authorized uses.
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 * Modifications to this software may be copyrighted by their authors
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 * and need not follow the licensing terms described here, provided that
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 * the new terms are clearly indicated on the first page of each file where
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 * they apply.
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 */
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#include "glue.h"
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typedef void (*write_proc_t)(char *buf, int nbytes);
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typedef int  (*read_proc_t)(char *buf, int nbytes);
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/* There is no "syscall", so we just call directly into the stub code
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   at fixed addresses. */
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#define STUB_WRITE(p,n) ((write_proc_t)0x8084)((p),(n))
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#define STUB_READ(p,n)  ((read_proc_t)0x8088)((p),(n))
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/*
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 * print -- do a raw print of a string
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 */
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void
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print(char *ptr)
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{
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  STUB_WRITE(ptr, strlen(ptr));
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}
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/*
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 * write -- write bytes to the serial port. Ignore fd, since
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 *          stdout and stderr are the same. Since we have no filesystem,
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 *          open will only return an error.
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 */
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int
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_write (int fd, char *buf, int nbytes)
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{
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  STUB_WRITE(buf, nbytes);
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  return (nbytes);
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}
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int
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_read (int fd, char *buf, int nbytes)
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{
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  return STUB_READ(buf, nbytes);
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}
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extern char _end[];
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#define HEAP_LIMIT ((char *)0xffff)
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void *
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_sbrk(int inc)
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{
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  static char *heap_ptr = _end;
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  void *base;
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  if (inc > (HEAP_LIMIT - heap_ptr))
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    return (void *)-1;
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  base = heap_ptr;
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  heap_ptr += inc;
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  return base;
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}
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void
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_exit(int n)
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{
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  while (1)
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   {
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     asm volatile ("nop");
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     asm volatile (".hword 0x0006");  /* breakpoint (special illegal insn) */
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   }
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}

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