diff options
Diffstat (limited to '')
-rw-r--r-- | c/src/lib/libbsp/m68k/mrm332/startup/linkcmds | 153 | ||||
-rw-r--r-- | c/src/lib/libbsp/m68k/mrm332/startup/linkcmds_ROM | 163 |
2 files changed, 316 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/m68k/mrm332/startup/linkcmds b/c/src/lib/libbsp/m68k/mrm332/startup/linkcmds new file mode 100644 index 0000000000..830f3a6572 --- /dev/null +++ b/c/src/lib/libbsp/m68k/mrm332/startup/linkcmds @@ -0,0 +1,153 @@ +/* linkcmds + * + * $Id$ + */ + +OUTPUT_ARCH(m68k) +__DYNAMIC = 0; + +/* + * The memory map looks like this: + * +--------------------+ <- low memory + * | .text | + * | etext | + * | ctor list | the ctor and dtor lists are for + * | dtor list | C++ support + * | _endtext | + * +--------------------+ + * | .data | initialized data goes here + * | _sdata | + * | _edata | + * +--------------------+ + * | .bss | + * | _clear_start| start of bss, cleared by crt0 + * | _end | start of heap, used by sbrk() + * +--------------------+ + * | heap space | + * | _ENDHEAP | + * | stack space | + * | __stack | top of stack + * +--------------------+ <- high memory + */ + +/* + * Declare some sizes. + */ +_RamBase = DEFINED(_RamBase) ? _RamBase : 0x03000; +_RamSize = DEFINED(_RamSize) ? _RamSize : 0x80000; +_RamEnd = _RamBase + _RamSize; +_HeapSize = DEFINED(_HeapSize) ? _HeapSize : 0x10000; +_StackSize = DEFINED(_StackSize) ? _StackSize : 0x1000; + +MEMORY +{ + ram : ORIGIN = 0x03000, LENGTH = 0x7d000 +} + +_copy_data_from_rom = 0; + +/* + * stick everything in ram (of course) + */ +SECTIONS +{ + 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 : { + _clear_start = .; + *(.bss) + *(COMMON) + . = ALIGN (16); + PROVIDE (end = .); + + . += _StackSize; + . = ALIGN (16); + _stack_init = .; + _clear_end = .; + + _WorkspaceBase = .; + } >ram +} diff --git a/c/src/lib/libbsp/m68k/mrm332/startup/linkcmds_ROM b/c/src/lib/libbsp/m68k/mrm332/startup/linkcmds_ROM new file mode 100644 index 0000000000..7467f78a25 --- /dev/null +++ b/c/src/lib/libbsp/m68k/mrm332/startup/linkcmds_ROM @@ -0,0 +1,163 @@ +/* linkcmds + * + * $Id$ + */ + +OUTPUT_ARCH(m68k) +STARTUP(except_vect_332_ROM.o) +__DYNAMIC = 0; + +/* + * ROM: + * +--------------------+ <- low memory + * | .text | + * | etext | + * | ctor list | the ctor and dtor lists are for + * | dtor list | C++ support + * | _endtext | + * | temporary .data | .data is moved to RAM by crt0 + * | | + * +--------------------+ <- high memory + * + * + * RAM: + * +--------------------+ <- low memory + * | .data | initialized data goes here + * | _sdata | + * | _edata | + * +--------------------+ + * | .bss | + * | __bss_start | start of bss, cleared by crt0 + * | _end | start of heap, used by sbrk() + * +--------------------+ + * | heap space | + * | _ENDHEAP | + * | stack space | + * | __stack | top of stack + * +--------------------+ <- high memory + */ + +MEMORY +{ + rom : ORIGIN = 0x90000, LENGTH = 0x70000 + ram : ORIGIN = 0x03000, LENGTH = 0x7d000 +} + +_RamBase = DEFINED(_RamBase) ? _RamBase : 0x003000; +_RamSize = DEFINED(_RamSize) ? _RamSize : 0x7d000; +_RamEnd = _RamBase + _RamSize; + +__end_of_ram = 0x080000; +_copy_data_from_rom = 1; +_HeapSize = DEFINED(_HeapSize) ? _HeapSize : 0x10000; +_StackSize = DEFINED(_StackSize) ? _StackSize : 0x1000; + +/* + * + */ +SECTIONS +{ + .text : + { + . = .; + CREATE_OBJECT_SYMBOLS + text_start = .; + _text_start = .; + *(.text) + . = ALIGN (16); + + + /* + * 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) + + *(.eh_fram) + . = ALIGN (16); + + /* + * Read-only data + */ + . = ALIGN (16); + _rodata_start = . ; + *(.rodata) + *(.gnu.linkonce.r*) + + etext = ALIGN(0x10); + __CTOR_LIST__ = .; + LONG((__CTOR_END__ - __CTOR_LIST__) / 4 - 2) + *(.ctors) + LONG(0) + __CTOR_END__ = .; + __DTOR_LIST__ = .; + LONG((__DTOR_END__ - __DTOR_LIST__) / 4 - 2) + *(.dtors) + LONG(0) + __DTOR_END__ = .; + *(.lit) + *(.shdata) + _etext = .; + _endtext = .; + } > rom + .gcc_exc : + AT ( ADDR(.text) + SIZEOF( .text ) ) + { + *(.gcc_exc) + } > ram + .data : + { + data_start = .; + _data_start = .; + _copy_start = .; + _sdata = . ; + *(.data) + CONSTRUCTORS + edata = ALIGN(0x10); + _edata = .; + } > ram + .shbss : + { + *(.shbss) + } > ram + .bss : + { + __bss_start = ALIGN(0x8); + bss_start = .; + _bss_start = .; + _clear_start = .; + *(.bss) + *(COMMON) + end = .; + _end = ALIGN(0x8); + __end = ALIGN(0x8); + + _WorkspaceBase = . + _StackSize; + } > ram + .stab . (NOLOAD) : + { + [ .stab ] + } + .stabstr . (NOLOAD) : + { + [ .stabstr ] + } +} |