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/*
 * This file contains GNU linker directives for a generic MC68340/349 board.
 * Variations in hardware type and dynamic memory size can be made
 * by overriding some values with linker command-line arguments.
 *
 * ATTENTION: RAM and ROM placement must accord those in start340.S!!
 *            (next time I'll use some shared variables :) )
 *
 * Geoffroy Montel
 * France Telecom - CNET/DSM/TAM/CAT
 * 4, rue du Clos Courtel
 * 35512 CESSON-SEVIGNE
 * FRANCE
 *
 * e-mail: g_montel@yahoo.com
 *
 *  $Id: linkcmds,v 1.2 2001-09-27 12:00:07 chris Exp $
 */
 
/*
 * Declare some sizes.
 */
_RamBase = DEFINED(_RamBase) ? _RamBase : 0x10000000;
_RamSize = DEFINED(_RamSize) ? _RamSize : 4M;
_HeapSize = DEFINED(_HeapSize) ? _HeapSize : 0x10000;
_StackSize = DEFINED(_StackSize) ? _StackSize : 0x1000;
 
/*
 * Declare on-board memory.
 * It would be nice if the ram length could be given as
 * LENGTH=_RamSize, but gld doesn't allow non-constant
 * values in the LENGTH expression.
 */
MEMORY {
          ram : ORIGIN = 0x10000000, LENGTH = 4M
          rom : ORIGIN = 0x01000000, LENGTH = 4M
/*        dpram : ORIGIN = 0xFE000000, LENGTH = 8k */
}
 
/*
 * Declare low-order three octets of Ethernet address.
 */
ETHERNET_ADDRESS = DEFINED(ETHERNET_ADDRESS) ? ETHERNET_ADDRESS : 0xDEAD12;
 
/*
 * Load objects
 */
SECTIONS {
 
        /*
         * Boot PROM
         */
        rom : {
                _RomBase = .;
                __RomBase = .;
        } >rom
 
        /*
         * Dynamic RAM
         */
        ram : {
                . = .;
        } >ram
 
        /*
         * Text, data and bss segments
         */
        .text : {
                *(.text)
 
                /*
                 * C++ constructors/destructors
                 */
                *(.gnu.linkonce.t.*)
 
                /*
                 * Initialization and finalization code.
                 *
                 * Various files can provide initialization and finalization
                 * functions.  crtbegin.o and crtend.o are two instances. The
                 * body of these functions are in .init and .fini sections. We
                 * accumulate the bodies here, and prepend function prologues
                 * from crti.o and function epilogues from crtn.o. crti.o must
                 * be linked first; crtn.o must be linked last.  Because these
                 * are wildcards, it doesn't matter if the user does not
                 * actually link against crti.o and crtn.o; the linker won't
                 * look for a file to match a wildcard.  The wildcard also
                 * means that it doesn't matter which directory crti.o and
                 * crtn.o are in.
                 */
                PROVIDE (_init = .);
                *crti.o(.init)
                *(.init)
                *crtn.o(.init)
                PROVIDE (_fini = .);
                *crti.o(.fini)
                *(.fini)
                *crtn.o(.fini)
 
                /*
                 * C++ constructors/destructors
                 *
                 * gcc uses crtbegin.o to find the start of the constructors
                 * and destructors so we make sure it is first.  Because this
                 * is a wildcard, it doesn't matter if the user does not
                 * actually link against crtbegin.o; the linker won't look for
                 * a file to match a wildcard.  The wildcard also means that
                 * it doesn't matter which directory crtbegin.o is in. The
                 * constructor and destructor list are terminated in
                 * crtend.o.  The same comments apply to it.
                 */
                . = ALIGN (16);
                *crtbegin.o(.ctors)
                *(.ctors)
                *crtend.o(.ctors)
                *crtbegin.o(.dtors)
                *(.dtors)
                *crtend.o(.dtors)
 
                /*
                 * Exception frame info
                 */
                . = ALIGN (16);
                *(.eh_frame)
 
                /*
                 * Read-only data
                 */
                . = ALIGN (16);
                _rodata_start = . ;
                *(.rodata)
                *(.gnu.linkonce.r*)
 
                 . = ALIGN (16);
                PROVIDE (_etext = .);
        } >ram
        .data : {
                PROVIDE (_copy_start = .);
                *(.data)
                *(.gnu.linkonce.d*)
                *(.gcc_except_table)
                . = ALIGN (16);
                PROVIDE (_edata = .);
                PROVIDE (_copy_end = .);
        } >ram
        .bss : {
                M68Kvec = .;
                . += (256 * 4);
                _clear_start = .;
                *(.bss)
                *(COMMON)
                . = ALIGN (16);
                PROVIDE (end = .);
 
                . += _StackSize;
                . = ALIGN (16);
                _stack_init = .;
                _clear_end = .;
 
                _WorkspaceBase = .;
        } >ram
 
       /*
        * On-chip memory/peripherals
        *
        */
        dpram : {
                m340 = .;
                _m340 = .;
                . += (8 * 1024);
        } >ram
 
}

Line No.	Rev	Author	Line
1	30	unneback	`/*`
2			`* This file contains GNU linker directives for a generic MC68340/349 board.`
3			`* Variations in hardware type and dynamic memory size can be made`
4			`* by overriding some values with linker command-line arguments.`
5			`*`
6			`* ATTENTION: RAM and ROM placement must accord those in start340.S!!`
7			`* (next time I'll use some shared variables :) )`
8			`*`
9			`* Geoffroy Montel`
10			`* France Telecom - CNET/DSM/TAM/CAT`
11			`* 4, rue du Clos Courtel`
12			`* 35512 CESSON-SEVIGNE`
13			`* FRANCE`
14			`*`
15			`* e-mail: g_montel@yahoo.com`
16			`*`
17			`* $Id: linkcmds,v 1.2 2001-09-27 12:00:07 chris Exp $`
18			`*/`
19
20			`/*`
21			`* Declare some sizes.`
22			`*/`
23			`_RamBase = DEFINED(_RamBase) ? _RamBase : 0x10000000;`
24			`_RamSize = DEFINED(_RamSize) ? _RamSize : 4M;`
25			`_HeapSize = DEFINED(_HeapSize) ? _HeapSize : 0x10000;`
26			`_StackSize = DEFINED(_StackSize) ? _StackSize : 0x1000;`
27
28			`/*`
29			`* Declare on-board memory.`
30			`* It would be nice if the ram length could be given as`
31			`* LENGTH=_RamSize, but gld doesn't allow non-constant`
32			`* values in the LENGTH expression.`
33			`*/`
34			`MEMORY {`
35			`ram : ORIGIN = 0x10000000, LENGTH = 4M`
36			`rom : ORIGIN = 0x01000000, LENGTH = 4M`
37			`/* dpram : ORIGIN = 0xFE000000, LENGTH = 8k */`
38			`}`
39
40			`/*`
41			`* Declare low-order three octets of Ethernet address.`
42			`*/`
43			`ETHERNET_ADDRESS = DEFINED(ETHERNET_ADDRESS) ? ETHERNET_ADDRESS : 0xDEAD12;`
44
45			`/*`
46			`* Load objects`
47			`*/`
48			`SECTIONS {`
49
50			`/*`
51			`* Boot PROM`
52			`*/`
53			`rom : {`
54			`_RomBase = .;`
55			`__RomBase = .;`
56			`} >rom`
57
58			`/*`
59			`* Dynamic RAM`
60			`*/`
61			`ram : {`
62			`. = .;`
63			`} >ram`
64
65			`/*`
66			`* Text, data and bss segments`
67			`*/`
68			`.text : {`
69			`*(.text)`
70
71			`/*`
72			`* C++ constructors/destructors`
73			`*/`
74			`(.gnu.linkonce.t.)`
75
76			`/*`
77			`* Initialization and finalization code.`
78			`*`
79			`* Various files can provide initialization and finalization`
80			`* functions. crtbegin.o and crtend.o are two instances. The`
81			`* body of these functions are in .init and .fini sections. We`
82			`* accumulate the bodies here, and prepend function prologues`
83			`* from crti.o and function epilogues from crtn.o. crti.o must`
84			`* be linked first; crtn.o must be linked last. Because these`
85			`* are wildcards, it doesn't matter if the user does not`
86			`* actually link against crti.o and crtn.o; the linker won't`
87			`* look for a file to match a wildcard. The wildcard also`
88			`* means that it doesn't matter which directory crti.o and`
89			`* crtn.o are in.`
90			`*/`
91			`PROVIDE (_init = .);`
92			`*crti.o(.init)`
93			`*(.init)`
94			`*crtn.o(.init)`
95			`PROVIDE (_fini = .);`
96			`*crti.o(.fini)`
97			`*(.fini)`
98			`*crtn.o(.fini)`
99
100			`/*`
101			`* C++ constructors/destructors`
102			`*`
103			`* gcc uses crtbegin.o to find the start of the constructors`
104			`* and destructors so we make sure it is first. Because this`
105			`* is a wildcard, it doesn't matter if the user does not`
106			`* actually link against crtbegin.o; the linker won't look for`
107			`* a file to match a wildcard. The wildcard also means that`
108			`* it doesn't matter which directory crtbegin.o is in. The`
109			`* constructor and destructor list are terminated in`
110			`* crtend.o. The same comments apply to it.`
111			`*/`
112			`. = ALIGN (16);`
113			`*crtbegin.o(.ctors)`
114			`*(.ctors)`
115			`*crtend.o(.ctors)`
116			`*crtbegin.o(.dtors)`
117			`*(.dtors)`
118			`*crtend.o(.dtors)`
119
120			`/*`
121			`* Exception frame info`
122			`*/`
123			`. = ALIGN (16);`
124			`*(.eh_frame)`
125
126			`/*`
127			`* Read-only data`
128			`*/`
129			`. = ALIGN (16);`
130			`_rodata_start = . ;`
131			`*(.rodata)`
132			`(.gnu.linkonce.r)`
133
134			`. = ALIGN (16);`
135			`PROVIDE (_etext = .);`
136			`} >ram`
137			`.data : {`
138			`PROVIDE (_copy_start = .);`
139			`*(.data)`
140			`(.gnu.linkonce.d)`
141			`*(.gcc_except_table)`
142			`. = ALIGN (16);`
143			`PROVIDE (_edata = .);`
144			`PROVIDE (_copy_end = .);`
145			`} >ram`
146			`.bss : {`
147			`M68Kvec = .;`
148			`. += (256 * 4);`
149			`_clear_start = .;`
150			`*(.bss)`
151			`*(COMMON)`
152			`. = ALIGN (16);`
153			`PROVIDE (end = .);`
154
155			`. += _StackSize;`
156			`. = ALIGN (16);`
157			`_stack_init = .;`
158			`_clear_end = .;`
159
160			`_WorkspaceBase = .;`
161			`} >ram`
162
163			`/*`
164			`* On-chip memory/peripherals`
165			`*`
166			`*/`
167			`dpram : {`
168			`m340 = .;`
169			`_m340 = .;`
170			`. += (8 * 1024);`
171			`} >ram`
172
173			`}`

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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [m68k/] [gen68340/] [startup/] [linkcmds] - Blame information for rev 30