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