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Diffstat (limited to 'libgloss/mips/nullmon.c')
| -rw-r--r-- | libgloss/mips/nullmon.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/libgloss/mips/nullmon.c b/libgloss/mips/nullmon.c new file mode 100644 index 000000000..12a157e8b --- /dev/null +++ b/libgloss/mips/nullmon.c @@ -0,0 +1,69 @@ +/* nullmon.c - Stub or monitor services. + * + * Copyright (c) 1998 Cygnus Support + * + * The authors hereby grant permission to use, copy, modify, distribute, + * and license this software and its documentation for any purpose, provided + * that existing copyright notices are retained in all copies and that this + * notice is included verbatim in any distributions. No written agreement, + * license, or royalty fee is required for any of the authorized uses. + * Modifications to this software may be copyrighted by their authors + * and need not follow the licensing terms described here, provided that + * the new terms are clearly indicated on the first page of each file where + * they apply. + */ + +/* This is a ROMSTUB + Various libraries in libgloss may reference board specific services. + These are often performed by system calls and by rom specific + interfaces such as dvemon.c This file defines the null interface in + which the rom monitor either does not exist or is not used. + Linking with this file supports applications which only exercise + the processor, specifically, the GDB test suite. + By linking this object in rather than a monitor specific support + we can insure that the testsuite will run without references or + linkages to nonexistent monitor services. + Similarly, every service provided by this file muse be provided by all + monitor speciifc interfaces. + PLEASE DO NOT MAKE THIS FILE SPECIFIC TO ANY MONITOR + */ + +/* This form is giving linker relocation errors */ +#if ! defined(BOARD_MEM_SIZE) +#define BOARD_MEM_SIZE 0x100000 /* About a megabyte */ +#endif +extern unsigned char _ftext ; /* Defined in nullmon.ld */ +extern unsigned char _end ; /* Defined in nullmon.ld */ + +#if defined(FIXME_WARNINGS) +#warning("FIXME: struct s_mem belongs in a header file") +#endif +struct s_mem +{ unsigned int size; + unsigned int icsize; + unsigned int dcsize; +}; + +void +get_mem_info (mem) + struct s_mem *mem; +{ char * t1, * t2 ; + unsigned long long tmp ; + t1 = & _ftext ; + t2 = & _end ; + tmp = (unsigned long long) (t2 - t1) ; + tmp = (unsigned long long) BOARD_MEM_SIZE - tmp ; + mem->size = tmp ; +} + +/* SYSTEM INTERFACE + Since we are defining a NULL operating environment here, I am + entering the stub definitions for the GNUpro libraries, System Calls. + I would rather not to even pretend to support these functions but, they + get pulled in by other libraries. +*/ + +int read(int file, char * ptr , int len) { return 0 ; } +int close (int file) { return -1 ; } +int write(int file , char * ptr, int len) { return 0 ; } +/*eof*/ |