source: rtems/c/src/lib/libbsp/m68k/ods68302/startup/linkcmds @ 35ff211

Last change on this file since 35ff211 was 35ff211, checked in by Joel Sherrill <joel.sherrill@…>, on 04/05/00 at 19:09:06

Now all m68k BSPs specify _RamBase. This is necessary for the shared
m68kbsppretaskinghook.c to work.
  • Property mode set to 100644
File size: 3.1 KB
Line 
1/*
2 * $Id$
3 *
4 * MC68302 Linker command file
5 *
6 */
7
8/*
9 * Declare some sizes.
10 */
11_RamBase = DEFINED(_RamBase) ? _RamBase : 0x0;
12_RamSize = DEFINED(_RamSize) ? _RamSize : 1M;
13_HeapSize = DEFINED(_HeapSize) ? _HeapSize : 0x10000;
14_StackSize = DEFINED(_StackSize) ? _StackSize : 0x1000;
15
16/*
17 * Declare on-board memory.
18 */
19MEMORY {
20          ram : ORIGIN = 0x00000000, LENGTH = 1M
21}
22SECTIONS
23{
24        ram : {
25                . = .;
26        } >ram
27
28        .vtable :
29        {
30                vtable_start = .;
31                *(.vtable)
32                evtable = .;
33        } >ram
34
35
36        /*
37         * Text, data and bss segments
38         */
39        .text : {
40                *(.text)
41
42                /*
43                 * C++ constructors/destructors
44                 */
45                *(.gnu.linkonce.t.*)
46
47                /*
48                 * Initialization and finalization code.
49                 *
50                 * Various files can provide initialization and finalization
51                 * functions.  crtbegin.o and crtend.o are two instances. The
52                 * body of these functions are in .init and .fini sections. We
53                 * accumulate the bodies here, and prepend function prologues
54                 * from crti.o and function epilogues from crtn.o. crti.o must
55                 * be linked first; crtn.o must be linked last.  Because these
56                 * are wildcards, it doesn't matter if the user does not
57                 * actually link against crti.o and crtn.o; the linker won't
58                 * look for a file to match a wildcard.  The wildcard also
59                 * means that it doesn't matter which directory crti.o and
60                 * crtn.o are in.
61                 */
62                PROVIDE (_init = .);
63                *crti.o(.init)
64                *(.init)
65                *crtn.o(.init)
66                PROVIDE (_fini = .);
67                *crti.o(.fini)
68                *(.fini)
69                *crtn.o(.fini)
70
71                /*
72                 * C++ constructors/destructors
73                 *
74                 * gcc uses crtbegin.o to find the start of the constructors
75                 * and destructors so we make sure it is first.  Because this
76                 * is a wildcard, it doesn't matter if the user does not
77                 * actually link against crtbegin.o; the linker won't look for
78                 * a file to match a wildcard.  The wildcard also means that
79                 * it doesn't matter which directory crtbegin.o is in. The
80                 * constructor and destructor list are terminated in
81                 * crtend.o.  The same comments apply to it.
82                 */
83                . = ALIGN (16);
84                *crtbegin.o(.ctors)
85                *(.ctors)
86                *crtend.o(.ctors)
87                *crtbegin.o(.dtors)
88                *(.dtors)
89                *crtend.o(.dtors)
90
91                /*
92                 * Exception frame info
93                 */
94                . = ALIGN (16);
95                *(.eh_frame)
96
97                /*
98                 * Read-only data
99                 */
100                . = ALIGN (16);
101                _rodata_start = . ;
102                *(.rodata)
103                *(.gnu.linkonce.r*)
104
105                 . = ALIGN (16);
106                PROVIDE (_etext = .);
107        } >ram
108        .data : {
109                PROVIDE (_copy_start = .);
110                *(.data)
111                *(.gnu.linkonce.d*)
112                *(.gcc_except_table)
113                . = ALIGN (16);
114                PROVIDE (_edata = .);
115                PROVIDE (_copy_end = .);
116        } >ram
117        .bss : {
118                _clear_start = .;
119                *(.bss)
120                *(COMMON)
121                . = ALIGN (16);
122                PROVIDE (end = .);
123
124                . += _StackSize;
125                . = ALIGN (16);
126                _stack_init = .;
127                _clear_end = .;
128
129                _WorkspaceBase = .;
130        } >ram
131}
132
133m302 = MC68302_BASE;
134_VBR = ADDR(.vtable);           /* location of the VBR table (in RAM) */
135
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