diff options
Diffstat (limited to 'bsps/m68k/mrm332/start/linkcmds')
| -rw-r--r-- | bsps/m68k/mrm332/start/linkcmds | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/bsps/m68k/mrm332/start/linkcmds b/bsps/m68k/mrm332/start/linkcmds new file mode 100644 index 0000000000..1ee7117d6b --- /dev/null +++ b/bsps/m68k/mrm332/start/linkcmds @@ -0,0 +1,212 @@ +/* linkcmds + */ + +OUTPUT_ARCH(m68k) +ENTRY(start) +STARTUP(start.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 + */ + +/* + * Declare some sizes. + */ +RomBase = DEFINED(RomBase) ? RomBase : 0x90000; +RamBase = DEFINED(RamBase) ? RamBase : 0x03000; +RamSize = DEFINED(RamSize) ? RamSize : 0x7d000; +_RamEnd = RamBase + RamSize; + +MEMORY +{ + rom : ORIGIN = 0x90000, LENGTH = 0x70000 + ram : ORIGIN = 0x03000, LENGTH = 0x7d000 +} + +_copy_data_from_rom = 1; +HeapSize = DEFINED(HeapSize) ? HeapSize : 0x0; +_StackSize = DEFINED(_StackSize) ? _StackSize : 0x2000; + + +/* + * + */ +SECTIONS +{ + .text : + { + . = .; + text_start = .; + _text_start = .; + *(.text*) + . = ALIGN (16); + + /* + * 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) + + /* + * Special FreeBSD sysctl sections. + */ + . = ALIGN (16); + __start_set_sysctl_set = .; + *(set_sysctl_*); + __stop_set_sysctl_set = ABSOLUTE(.); + *(set_domain_*); + *(set_pseudo_*); + + /* + * 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*) + KEEP (*(SORT(.rtemsroset.*))) + *(.gnu.linkonce.r*) + + . = ALIGN (16); + PROVIDE (_etext = .); + _endtext = .; + __data_start_rom = .; + } > rom + .tdata : { + _TLS_Data_begin = .; + *(.tdata .tdata.* .gnu.linkonce.td.*) + _TLS_Data_end = .; + } > rom + .tbss : { + _TLS_BSS_begin = .; + *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon) + _TLS_BSS_end = .; + } > rom + _TLS_Data_size = _TLS_Data_end - _TLS_Data_begin; + _TLS_Data_begin = _TLS_Data_size != 0 ? _TLS_Data_begin : _TLS_BSS_begin; + _TLS_Data_end = _TLS_Data_size != 0 ? _TLS_Data_end : _TLS_BSS_begin; + _TLS_BSS_size = _TLS_BSS_end - _TLS_BSS_begin; + _TLS_Size = _TLS_BSS_end - _TLS_Data_begin; + _TLS_Alignment = MAX (ALIGNOF (.tdata), ALIGNOF (.tbss)); + .gcc_exc : + AT ( ADDR(.tdata) + SIZEOF( .tdata ) ) + { + *(.gcc_exc) + } > ram + .data : AT(__data_start_rom) + { + PROVIDE (_copy_start = .); + *(.data*) + KEEP (*(SORT(.rtemsrwset.*))) + *(.gnu.linkonce.d*) + *(.gcc_except_table*) + *(.jcr) + . = ALIGN (16); + PROVIDE (_edata = .); + PROVIDE (_copy_end = .); + } > ram + .shbss : + { + *(.shbss) + } > ram + .bss : + { + M68Kvec = .; + . += (256 * 4); + _clear_start = .; + *(.dynbss) + *(.bss* .gnu.linkonce.b.*) + *(COMMON) + . = ALIGN (16); + PROVIDE (end = .); + . += _StackSize; + . = ALIGN (16); + _stack_init = .; + _clear_end = .; + + WorkAreaBase = .; + } > ram + .stab . (NOLOAD) : + { + [ .stab ] + } + .stabstr . (NOLOAD) : + { + [ .stabstr ] + } +} |