diff options
Diffstat (limited to 'c/src/lib/libbsp/m68k/gen68340/startup/linkcmds')
| -rw-r--r-- | c/src/lib/libbsp/m68k/gen68340/startup/linkcmds | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/m68k/gen68340/startup/linkcmds b/c/src/lib/libbsp/m68k/gen68340/startup/linkcmds new file mode 100644 index 0000000000..4dbfa37084 --- /dev/null +++ b/c/src/lib/libbsp/m68k/gen68340/startup/linkcmds @@ -0,0 +1,155 @@ +/* + * This file contains GNU linker directives for a generic MC68340/349 board. + * Variations in hardware type and dynamic memory size can be made + * by overriding some values with linker command-line arguments. + * + * ATTENTION: RAM and ROM placement must accord those in start340.S!! + * (next time I'll use some shared variables :) ) + * + * Geoffroy Montel + * France Telecom - CNET/DSM/TAM/CAT + * 4, rue du Clos Courtel + * 35512 CESSON-SEVIGNE + * FRANCE + * + * e-mail: g_montel@yahoo.com + * + * $Id$ + */ + +/* + * a.out format doesn't handle prom images very well + */ +OUTPUT_FORMAT(coff-m68k) + +/* + * Declare some sizes. + * XXX: The assignment of ". += XyzSize;" fails in older gld's if the + * number used there is not constant. If this happens to you, edit + * the lines marked XXX below to use a constant value. + */ +RamSize = DEFINED(RamSize) ? RamSize : 4M; +HeapSize = DEFINED(HeapSize) ? HeapSize : 0x10000; +StackSize = DEFINED(StackSize) ? StackSize : 0x1000; + +/* + * Declare on-board memory. + * It would be nice if the ram length could be given as + * LENGTH=RamSize, but gld doesn't allow non-constant + * values in the LENGTH expression. + */ +MEMORY { + ram : ORIGIN = 0x10000000, LENGTH = 4M + rom : ORIGIN = 0x01000000, LENGTH = 4M +/* dpram : ORIGIN = 0xFE000000, LENGTH = 8k */ +} + +/* + * Declare low-order three octets of Ethernet address. + */ +ETHERNET_ADDRESS = DEFINED(ETHERNET_ADDRESS) ? ETHERNET_ADDRESS : 0xDEAD12; + +/* + * Load objects + */ +SECTIONS { + /* + * Hardware variations + */ + _RamSize = RamSize; + __RamSize = RamSize; + + /* + * Boot PROM + */ + rom : { + _RomBase = .; + __RomBase = .; + } >rom + + /* + * Dynamic RAM + */ + ram : { + _RamBase = .; + __RamBase = .; + } >ram + + /* + * Text, data and bss segments + */ + .text : { + CREATE_OBJECT_SYMBOLS + *(.text) + . = ALIGN (16); + + /* + * C++ constructors + */ + __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__ = .; + + etext = .; + _etext = .; + } >rom + + .eh_fram : { + . = ALIGN (16); + *(.eh_fram) + } >ram + + .gcc_exc : { + . = ALIGN (16); + *(.gcc_exc) + } >ram + + /* + * On-chip memory/peripherals + * + */ + dpram : { + m340 = .; + _m340 = .; + . += (8 * 1024); + } >ram + + .data : { + copy_start = .; + *(.data) + . = ALIGN (16); + _edata = .; + copy_end = .; + } >ram + + .bss : { + M68Kvec = .; + _M68Kvec = .; + . += (256 * 4); + clear_start = .; + *(.bss) + *(COMMON) + . = ALIGN (16); + _end = .; + + _HeapStart = .; + __HeapStart = .; + . += HeapSize; /* XXX -- Old gld can't handle this */ + . += StackSize; /* XXX -- Old gld can't handle this */ + /* . += 0x10000; */ /* HeapSize for old gld */ + /* . += 0x1000; */ /* StackSize for old gld */ + . = ALIGN (16); + stack_init = .; + clear_end = .; + + _WorkspaceBase = .; + __WorkspaceBase = .; + } >ram +} |