source: rtems/c/src/lib/libbsp/m68k/mvme136/startup/linkcmds @ b2b4835

4.104.114.84.95
Last change on this file since b2b4835 was b2b4835, checked in by Joel Sherrill <joel.sherrill@…>, on Jan 12, 2000 at 4:38:57 PM

Eric Norum <eric@…> submitted linker script and bsp_specs
for the gen68360 that let it work with ELF and C++ exceptions. This
was used as the basis for changes to EVERY m68k bsp_specs and linkcmds.
Before this modification is over, the layout of the starting stack,
heap, and workspace will likely be modified for every m68k BSP. Then
they will all be very similar.

  • Property mode set to 100644
File size: 3.3 KB
Line 
1/*
2 *  This file contains directives for the GNU linker which are specific
3 *  to the Motorola MVME136/MVME135 boards.
4 *
5 *  COPYRIGHT (c) 1989-1999.
6 *  On-Line Applications Research Corporation (OAR).
7 *
8 *  The license and distribution terms for this file may be
9 *  found in the file LICENSE in this distribution or at
10 *  http://www.OARcorp.com/rtems/license.html.
11 *
12 *  $Id$
13 */
14
15/*
16 * Declare some sizes.
17 */
18HeapSize = DEFINED(HeapSize) ? HeapSize : 0x10000;
19StackSize = DEFINED(StackSize) ? StackSize : 0x1000;
20
21MEMORY
22{
23        ram : org = 0x0, l = 1M
24}
25
26SECTIONS
27{
28        ram : {
29                . = 0x3000;
30        } >ram
31
32        /*
33         * Text, data and bss segments
34         */
35        .text : {
36                *(.text)
37
38                /*
39                 * C++ constructors/destructors
40                 *
41                 * Various files can provide initialization and finalization
42                 * functions.  crtbegin.o and crtend.o are two instances. The
43                 * body of these functions are in .init and .fini sections. We
44                 * accumulate the bodies here, and prepend function prologues
45                 * from crti.o and function epilogues from crtn.o. crti.o must
46                 * be linked first; crtn.o must be linked last.  Because these
47                 * are wildcards, it doesn't matter if the user does not
48                 * actually link against crti.o and crtn.o; the linker won't
49                 * look for a file to match a wildcard.  The wildcard also
50                 * means that it doesn't matter which directory crti.o and
51                 * crtn.o are in.
52                 */
53                *(.gnu.linkonce.t.*)
54
55                /*
56                 * Initialization and finalization code.
57                 *
58                 * gcc uses crtbegin.o to find the start of the constructors
59                 * and destructors so we make sure it is first.  Because this
60                 * is a wildcard, it doesn't matter if the user does not
61                 * actually link against crtbegin.o; the linker won't look for
62                 * a file to match a wildcard.  The wildcard also means that
63                 * it doesn't matter which directory crtbegin.o is in. The
64                 * constructor and destructor list are terminated in
65                 * crtend.o.  The same comments apply to it.
66                 */
67                PROVIDE (_init = .);
68                *crti.o(.init)
69                *(.init)
70                *crtn.o(.init)
71                PROVIDE (_fini = .);
72                *crti.o(.fini)
73                *(.fini)
74                *crtn.o(.fini)
75
76                /*
77                 * C++ constructors/destructors
78                 */
79                . = ALIGN (16);
80                *crtbegin.o(.ctors)
81                *(.ctors)
82                *crtend.o(.ctors)
83                *crtbegin.o(.dtors)
84                *(.dtors)
85                *crtend.o(.dtors)
86
87                /*
88                 * Exception frame info
89                 */
90                . = ALIGN (16);
91                *(.eh_frame)
92
93                /*
94                 * Read-only data
95                 */
96                . = ALIGN (16);
97                _rodata_start = . ;
98                *(.rodata)
99                *(.gnu.linkonce.r*)
100
101                 . = ALIGN (16);
102                PROVIDE (_etext = .);
103        } >ram
104        .data : {
105                PROVIDE (_copy_start = .);
106                *(.data)
107                *(.gnu.linkonce.d*)
108                *(.gcc_except_table)
109                . = ALIGN (16);
110                PROVIDE (_edata = .);
111                PROVIDE (_copy_end = .);
112        } >ram
113        .bss : {
114                PROVIDE (_bss_start = .);
115                PROVIDE (_clear_start = .);
116                *(.bss)
117                *(COMMON)
118                . = ALIGN (16);
119                PROVIDE (end = .);
120
121                . += StackSize;
122                PROVIDE (_stack_init = .);
123
124                . = ALIGN (16);
125                PROVIDE (_HeapStart = .);
126                . += HeapSize;
127                PROVIDE (_HeapEnd = .);
128
129                clear_end = .;
130
131                PROVIDE (_WorkspaceBase = .);
132        } >ram
133}
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