diff options
Diffstat (limited to 'src/arch/ppc/init/ldscript.lb')
| -rw-r--r-- | src/arch/ppc/init/ldscript.lb | 460 |
1 files changed, 91 insertions, 369 deletions
diff --git a/src/arch/ppc/init/ldscript.lb b/src/arch/ppc/init/ldscript.lb index 0afc563b50..63a32b735d 100644 --- a/src/arch/ppc/init/ldscript.lb +++ b/src/arch/ppc/init/ldscript.lb @@ -1,372 +1,94 @@ -/*----------------------------------------------------------------------------+ -| Memory layout. RAM length is referenced again in __heap_size variable -| definition. -+----------------------------------------------------------------------------*/ -MEMORY -{ - RAM_VECT (rwx) : ORIGIN = 0x00000000, LENGTH = 0x00010000 - RAM (rwx) : ORIGIN = 0x00010000, LENGTH = 0x003F0000 - ROM_INIT (r x) : ORIGIN = 0xFFF00000, LENGTH = 0x00002000 - ROM (r x) : ORIGIN = 0xFFF02000, LENGTH = 0x000FE000 -} - -/*----------------------------------------------------------------------------+ -| Sections originally taken from default GNU LD script. -+----------------------------------------------------------------------------*/ +/* + * Memory map: + * + * _ROMBASE : start of ROM + * _RESET : reset vector (may be at top of ROM) + * _EXCEPTIONS_VECTORS : exception table + * + * _ROMSTART : linuxbios text + * : payload text + * + * _RAMBASE : address to copy payload + */ + +/* + * Written by Johan Rydberg, based on work by Daniel Kahlin. + * Rewritten by Eric Biederman + * Re-rewritten by Greg Watson for PPC + */ + +/* + * We use ELF as output format. So that we can + * debug the code in some form. + */ + +OUTPUT_FORMAT("elf32-powerpc") +ENTRY(_start) + +TARGET(binary) +INPUT(linuxbios_ram.rom) SECTIONS { - - /*-------------------------------------------------------------------------+ - | Create dummy section. We need to do this so that the __stext symbol is - | set correctly. - +-------------------------------------------------------------------------*/ - .dummyt : - { - LONG(0x00000000) - } > RAM - - /*-------------------------------------------------------------------------+ - | Create variable holding the value of the start of the text. - +-------------------------------------------------------------------------*/ - __stext = . - SIZEOF(.dummyt); - - .hash : - { - *(.hash) - } > RAM - - .dynsym : - { - *(.dynsym) - } > RAM - - .dynstr : - { - *(.dynstr) - } > RAM - - .rel.init : - { - *(.rel.init) - } > RAM - - .rela.init : - { - *(.rela.init) - } > RAM - - .rel.text : - { - *(.rel.text) - *(.rel.text.*) - *(.rel.gnu.linkonce.t.*) - } > RAM - - .rela.text : - { - *(.rela.text) - *(.rela.text.*) - *(.rela.gnu.linkonce.t.*) - } > RAM - - .rel.rodata : - { - *(.rel.rodata) - *(.rel.rodata.*) - *(.rel.gnu.linkonce.r.*) - } > RAM - - .rela.rodata : - { - *(.rela.rodata) - *(.rela.rodata.*) - *(.rela.gnu.linkonce.r.*) - } > RAM - - .rel.data : - { - *(.rel.data) - *(.rel.data.*) - *(.rel.gnu.linkonce.d.*) - } > RAM - - .rela.data : - { - *(.rela.data) - *(.rela.data.*) - *(.rela.gnu.linkonce.d.*) - } > RAM - - .rel.sdata : - { - *(.rel.sdata) - *(.rel.sdata.*) - *(.rel.gnu.linkonce.s.*) - } > RAM - - .rela.sdata : - { - *(.rela.sdata) - *(.rela.sdata.*) - *(.rela.gnu.linkonce.s.*) - } > RAM - - .rel.sbss : - { - *(.rel.sbss) - *(.rel.sbss.*) - *(.rel.gnu.linkonce.sb.*) - } > RAM - - .rela.sbss : - { - *(.rela.sbss) - *(.rela.sbss.*) - *(.rel.gnu.linkonce.sb.*) - } > RAM - - .rel.sdata2 : - { - *(.rel.sdata2) - *(.rel.sdata2.*) - *(.rel.gnu.linkonce.s2.*) - } > RAM - - .rela.sdata2 : - { - *(.rela.sdata2) - *(.rela.sdata2.*) - *(.rela.gnu.linkonce.s2.*) - } > RAM - - .rel.sbss2 : - { - *(.rel.sbss2) - *(.rel.sbss2.*) - *(.rel.gnu.linkonce.sb2.*) - } > RAM - - .rela.sbss2 : - { - *(.rela.sbss2) - *(.rela.sbss2.*) - *(.rela.gnu.linkonce.sb2.*) - } > RAM - - .rel.bss : - { - *(.rel.bss) - *(.rel.bss.*) - *(.rel.gnu.linkonce.b.*) - } > RAM - - .rela.bss : - { - *(.rela.bss) - *(.rela.bss.*) - *(.rela.gnu.linkonce.b.*) - } > RAM - - .rel.plt : - { - *(.rel.plt) - } > RAM - - .rela.plt : - { - *(.rela.plt) - } > RAM - - /*-------------------------------------------------------------------------+ - | Keep the .init sections even if they are not referenced. Fill in the - | space (if any) in the .init serctions with 0. - +-------------------------------------------------------------------------*/ - .text : - { - *(.text) - *(.text.*) - *(.stub) - *(.gnu.warning) - *(.gnu.linkonce.t.*) - } > RAM = 0 - - /*-------------------------------------------------------------------------+ - | Create variable holding the value of the end of the text. - +-------------------------------------------------------------------------*/ - __etext = .; - - /*-------------------------------------------------------------------------+ - | Create variable holding the value of the start of the data. - +-------------------------------------------------------------------------*/ - __sdata = .; - - .rodata : - { - *(.rodata) - *(.rodata.*) - *(.gnu.linkonce.r.*) - } > RAM - - .rodata1 : - { - *(.rodata1) - } > RAM - - .sdata2 : - { - *(.sdata2) - *(.sdata2.*) - *(.gnu.linkonce.s2.*) - } > RAM - - .sbss2 : - { - *(.sbss2) - *(.sbss2.*) - *(.gnu.linkonce.sb2.*) - } > RAM - - /*-------------------------------------------------------------------------+ - | Align data to word boundary. - +-------------------------------------------------------------------------*/ - . = ALIGN(4); - - .data : - { - *(.data) - *(.data.*) - *(.gnu.linkonce.d.*) - } > RAM - - .toc : - { - *(.toc) - *(.toc.*) - } > RAM - - .opd : - { - *(.opd) - *(.opd.*) - } > RAM - - .data1 : - { - *(.data1) - } > RAM - - .eh_frame : - { - KEEP(*(.eh_frame)) - } > RAM - - .fixup : - { - *(.fixup) - } > RAM - - .dynamic : - { - *(.dynamic) - } > RAM - - /*-------------------------------------------------------------------------+ - | We want the small data sections together, so single-instruction offsets - | can access them all, and initialized data all before uninitialized, so - | we can shorten the on-disk segment size. - +-------------------------------------------------------------------------*/ - .sdata : - { - *(.sdata) - *(.sdata.*) - *(.gnu.linkonce.s.*) - } > RAM - - /*-------------------------------------------------------------------------+ - | Create variable holding the value of the end of the data. - +-------------------------------------------------------------------------*/ - __edata = .; - - /*-------------------------------------------------------------------------+ - | Create variable holding the value of the start of the bss. - +-------------------------------------------------------------------------*/ - __sbss = .; - - .sbss : - { - *(.dynsbss) - *(.sbss) - *(.sbss.*) - *(.gnu.linkonce.sb.*) - *(.scommon) - } > RAM - - .plt : - { - *(.plt) - } > RAM - - /*-------------------------------------------------------------------------+ - | Common symbols are placed in the BSS section. - +-------------------------------------------------------------------------*/ - .bss : - { - *(.dynbss) - *(.bss) - *(.bss.*) - *(.gnu.linkonce.b.*) - *(COMMON) - } > RAM - - /*-------------------------------------------------------------------------+ - | Align so that the bss size and __ebss are word aligned. - +-------------------------------------------------------------------------*/ - . = ALIGN(4); - - /*-------------------------------------------------------------------------+ - | Create variable holding the value of the end of the bss. - +-------------------------------------------------------------------------*/ - __ebss = .; - - /*-------------------------------------------------------------------------+ - | Create variables describing the heap. The value "0x3F0000" must be - | equal to RAM length. - +-------------------------------------------------------------------------*/ - __heap_start = .; - __heap_size = 0x3F0000 + ADDR(.dummyt) - .; - - /*-------------------------------------------------------------------------+ - | Stabs. Symbols in the following sections are relative to the beginning - | of the section so we begin them at 0. - +-------------------------------------------------------------------------*/ - .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) - } - + /* + * Absolute location of base of ROM + */ + . = _ROMBASE; + + /* + * Absolute location of reset vector. This may actually be at the + * the top of ROM. + */ + . = _RESET; + .reset . : { + *(.rom.reset); + . = ALIGN(16); + } + + /* + * Absolute location of exception vector table. + */ + . = _EXCEPTION_VECTORS; + .exception_vectors . : { + *(.rom.exception_vectors); + . = ALIGN(16); + } + + /* + * Absolute location of LinuxBIOS initialization code in ROM. + */ + . = _ROMSTART; + .rom . : { + _rom = .; + *(.rom.text); + *(.text); + *(.rom.data); + *(.rodata); + *(EXCLUDE_FILE(linuxbios_ram.rom) .data); + . = ALIGN(16); + _erom = .; + } + _lrom = LOADADDR(.rom); + _elrom = LOADADDR(.rom) + SIZEOF(.rom); + + /* + * Ram is the LinuxBIOS code that runs from RAM. + */ + .ram . : { + _ram = . ; + linuxbios_ram.rom(*) + _eram = . ; + } + + /* + * Absolute location of where LinuxBIOS will be relocated in RAM. + */ + _iseg = _RAMBASE; + _eiseg = _iseg + SIZEOF(.ram); + _liseg = _ram; + _eliseg = _eram; + + /DISCARD/ : { + *(.comment) + *(.note) + } } |