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STARTUP(crt0.o)
OUTPUT_ARCH(m68k)
/* Uncomment this if you want srecords. This is needed for a.out
* if you plan to use GDB.
OUTPUT_FORMAT(srec)
*/
SEARCH_DIR(.)
GROUP(-lidpgdb -lc -lgcc)
__DYNAMIC = 0;
/*
* Setup the memory map of the MC68ec0x0 Board (IDP)
* stack grows down from high memory. This works for
* both the rom68k and the mon68k monitors.
*
* The memory map look like this:
* +--------------------+ <- low memory
* | .text |
* | _etext |
* | ctor list | the ctor and dtor lists are for
* | dtor list | C++ support
* +--------------------+
* | .data | initialized data goes here
* | _edata |
* +--------------------+
* | .bss |
* | __bss_start | start of bss, cleared by crt0
* | _end | start of heap, used by sbrk()
* +--------------------+
* . .
* . .
* . .
* | __stack | top of stack
* +--------------------+
*/
/*
* When the IDP is not remapped (see rom68k's MP command in the
* "M68EC0x0IDP Users Manual", the first 64K bytes are reserved;
* Otherwise the first 256K bytes are reserved.
*
* The following memory map describes a unmapped IDP w/2MB RAM.
*/
MEMORY
{
ram (rwx) : ORIGIN = 0x00010000, LENGTH = 2M-64K
rom0 : ORIGIN = 0x00800000, LENGTH = 1M
rom1 : ORIGIN = 0x00900000, LENGTH = 1M
}
/*
* allocate the stack to be at the top of memory, since the stack
* grows down
*/
PROVIDE (__stack = 2M - 8);
/*
* Initalize some symbols to be zero so we can reference them in the
* crt0 without core dumping. These functions are all optional, but
* we do this so we can have our crt0 always use them if they exist.
* This is so BSPs work better when using the crt0 installed with gcc.
* We have to initalize them twice, so we cover a.out (which prepends
* an underscore) and coff object file formats.
*/
PROVIDE (hardware_init_hook = 0);
PROVIDE (_hardware_init_hook = 0);
PROVIDE (software_init_hook = 0);
PROVIDE (_software_init_hook = 0);
/*
* stick everything in ram (of course)
*/
SECTIONS
{
.text :
{
CREATE_OBJECT_SYMBOLS
*(.text)
. = ALIGN(0x4);
/* These are for running static constructors and destructors under ELF. */
KEEP (*crtbegin.o(.ctors))
KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
KEEP (*(SORT(.ctors.*)))
KEEP (*(.ctors))
KEEP (*crtbegin.o(.dtors))
KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
KEEP (*(SORT(.dtors.*)))
KEEP (*(.dtors))
*(.rodata)
. = ALIGN(0x4);
*(.gcc_except_table)
. = ALIGN(0x4);
*(.eh_frame)
. = ALIGN(0x4);
__INIT_SECTION__ = . ;
LONG (0x4e560000) /* linkw %fp,#0 */
*(.init)
SHORT (0x4e5e) /* unlk %fp */
SHORT (0x4e75) /* rts */
. = ALIGN(0x4);
__FINI_SECTION__ = . ;
LONG (0x4e560000) /* linkw %fp,#0 */
*(.fini)
SHORT (0x4e5e) /* unlk %fp */
SHORT (0x4e75) /* rts */
_etext = .;
*(.lit)
} > ram
.data :
{
*(.shdata)
*(.data)
_edata = .;
} > ram
.bss :
{
. = ALIGN(0x4);
__bss_start = . ;
*(.shbss)
*(.bss)
*(COMMON)
_end = ALIGN (0x8);
__end = _end;
} > ram
.stab 0 (NOLOAD) :
{
*(.stab)
}
.stabstr 0 (NOLOAD) :
{
*(.stabstr)
}
}
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