diff options
Diffstat (limited to 'c/src/lib/libbsp/m68k/efi332/startup/linkcmds_ROM')
| -rw-r--r-- | c/src/lib/libbsp/m68k/efi332/startup/linkcmds_ROM | 211 |
1 files changed, 148 insertions, 63 deletions
diff --git a/c/src/lib/libbsp/m68k/efi332/startup/linkcmds_ROM b/c/src/lib/libbsp/m68k/efi332/startup/linkcmds_ROM index acfee4c07f..bdc7206975 100644 --- a/c/src/lib/libbsp/m68k/efi332/startup/linkcmds_ROM +++ b/c/src/lib/libbsp/m68k/efi332/startup/linkcmds_ROM @@ -8,6 +8,7 @@ STARTUP(except_vect_332_ROM.o) __DYNAMIC = 0; /* + * The memory map looks like this: * ROM: * +--------------------+ <- low memory * | .text | @@ -22,30 +23,38 @@ __DYNAMIC = 0; * * RAM: * +--------------------+ <- low memory + * | _RamBase | * | .data | initialized data goes here * | _sdata | * | _edata | * +--------------------+ * | .bss | - * | __bss_start | start of bss, cleared by crt0 + * | _clear_start| start of bss, cleared by crt0 * | _end | start of heap, used by sbrk() * +--------------------+ + * | _WorkspaceBase + * | work space | + * | heapStart | * | heap space | - * | _ENDHEAP | - * | stack space | - * | __stack | top of stack + * | _RamEnd | top of stack * +--------------------+ <- high memory */ +/* + * Declare some sizes. + */ +_RamBase = DEFINED(_RamBase) ? _RamBase : 0x80000; +_RamSize = DEFINED(_RamSize) ? _RamSize : 0x40000; +_RamEnd = _RamBase + _RamSize; +_HeapSize = DEFINED(_HeapSize) ? _HeapSize : 0x10000; +_StackSize = DEFINED(_StackSize) ? _StackSize : 0x1000; + MEMORY { rom : ORIGIN = 0x00000, LENGTH = 256K - ram : ORIGIN = 0x80000, LENGTH = 512K + ram : ORIGIN = 0x80000, LENGTH = 256K } -_RamBase = DEFINED(_RamBase) ? _RamBase : 0x080000; - -__end_of_ram = 0x100000; _copy_data_from_rom = 1; /* @@ -53,69 +62,145 @@ _copy_data_from_rom = 1; */ SECTIONS { - .text : - { - CREATE_OBJECT_SYMBOLS - text_start = .; - _text_start = .; + ram : { + . = .; + } >ram + + /* + * Text, data and bss segments + */ + .text : { *(.text) - . = ALIGN (16); - *(.eh_fram) - . = 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) - etext = ALIGN(0x10); - _etext = .; - __CTOR_LIST__ = .; - LONG((__CTOR_END__ - __CTOR_LIST__) / 4 - 2) + /* + * 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) - LONG(0) - __CTOR_END__ = .; - __DTOR_LIST__ = .; - LONG((__DTOR_END__ - __DTOR_LIST__) / 4 - 2) + *crtend.o(.ctors) + *crtbegin.o(.dtors) *(.dtors) - LONG(0) - __DTOR_END__ = .; - *(.lit) - *(.shdata) - _endtext = .; - } > rom - .gcc_exc : - AT ( ADDR(.text) + SIZEOF( .text ) ) - { - *(.gcc_exc) - } > ram + *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 = .); + } >rom .data : + AT ( ADDR(.text) + SIZEOF( .text ) ) { - data_start = .; - _data_start = .; - _sdata = . ; + PROVIDE (_copy_start = .); *(.data) - CONSTRUCTORS - edata = ALIGN(0x10); - _edata = .; - } > ram - .shbss : - { - *(.shbss) - } > ram - .bss : - { - __bss_start = ALIGN(0x8); - bss_start = .; - _bss_start = .; + *(.gnu.linkonce.d*) + *(.gcc_except_table) + . = ALIGN (16); + PROVIDE (_edata = .); + PROVIDE (_copy_end = .); + } >ram + .bss : { + _clear_start = .; *(.bss) *(COMMON) - end = .; - _end = ALIGN(0x8); - __end = ALIGN(0x8); - } > ram - .stab . (NOLOAD) : - { - [ .stab ] - } - .stabstr . (NOLOAD) : - { - [ .stabstr ] - } + . = ALIGN (16); + PROVIDE (end = .); + + . += _StackSize; + . = ALIGN (16); + _stack_init = .; + _clear_end = .; + + _WorkspaceBase = .; + } >ram + + /* Stabs debugging sections. */ + .stab 0 : { *(.stab) } + .stabstr 0 : { *(.stabstr) } + .stab.excl 0 : { *(.stab.excl) } + .stab.exclstr 0 : { *(.stab.exclstr) } + .stab.index 0 : { *(.stab.index) } + .stab.indexstr 0 : { *(.stab.indexstr) } + .comment 0 : { *(.comment) } + + /* DWARF debug sections. + Symbols in the DWARF debugging sections are relative to the beginning + of the section so we begin them at 0. */ + /* DWARF 1 */ + .debug 0 : { *(.debug) } + .line 0 : { *(.line) } + + /* GNU DWARF 1 extensions */ + .debug_srcinfo 0 : { *(.debug_srcinfo) } + .debug_sfnames 0 : { *(.debug_sfnames) } + + /* DWARF 1.1 and DWARF 2 */ + .debug_aranges 0 : { *(.debug_aranges) } + .debug_pubnames 0 : { *(.debug_pubnames) } + + /* DWARF 2 */ + .debug_info 0 : { *(.debug_info) } + .debug_abbrev 0 : { *(.debug_abbrev) } + .debug_line 0 : { *(.debug_line) } + .debug_frame 0 : { *(.debug_frame) } + .debug_str 0 : { *(.debug_str) } + .debug_loc 0 : { *(.debug_loc) } + .debug_macinfo 0 : { *(.debug_macinfo) } + + /* SGI/MIPS DWARF 2 extensions */ + .debug_weaknames 0 : { *(.debug_weaknames) } + .debug_funcnames 0 : { *(.debug_funcnames) } + .debug_typenames 0 : { *(.debug_typenames) } + .debug_varnames 0 : { *(.debug_varnames) } + /* These must appear regardless of . */ } |