70f654991a
is used as the bootloader on a number of PPC64 platforms. This involves the following pieces: - Making the first instruction a valid kernel entry point, since kexec ignores the ELF entry value. This requires a separate section and linker magic to prevent the linker from filling the beginning of the section with stubs. - Adding an entry point at 0x60 past the first instruction for systems lacking firmware CPU shutdown support (notably PS3). - Linker script changes to support the above. MFC after: 1 month
155 lines
4.7 KiB
Plaintext
155 lines
4.7 KiB
Plaintext
/* $FreeBSD$ */
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OUTPUT_FORMAT("elf64-powerpc-freebsd", "elf64-powerpc-freebsd",
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"elf64-powerpc-freebsd")
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OUTPUT_ARCH(powerpc:common64)
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ENTRY(__start)
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SEARCH_DIR(/usr/lib);
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PROVIDE (__stack = 0);
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SECTIONS
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{
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/* Low-address wrapper for bootloaders (kexec/kboot) that can't parse ELF */
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. = kernbase - 0x100;
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.kboot : { *(.text.kboot) }
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/* Read-only sections, merged into text segment: */
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. = kernbase;
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PROVIDE (begin = .);
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.text :
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{
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*(.text)
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*(.stub)
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/* .gnu.warning sections are handled specially by elf32.em. */
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*(.gnu.warning)
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*(.gnu.linkonce.t*)
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} =0
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_etext = .;
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PROVIDE (etext = .);
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/* Do not emit PT_INTERP section, which confuses some loaders (kexec-lite) */
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.interpX : { *(.interp) } : NONE
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/DISCARD/ : { *(.interp) }
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/* Also delete notes */
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/DISCARD/ : { *(.note.*) }
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.hash : { *(.hash) }
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.dynsym : { *(.dynsym) }
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.dynstr : { *(.dynstr) }
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.gnu.version : { *(.gnu.version) }
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.gnu.version_d : { *(.gnu.version_d) }
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.gnu.version_r : { *(.gnu.version_r) }
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.rela.text :
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{ *(.rela.text) *(.rela.gnu.linkonce.t*) }
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.rela.data :
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{ *(.rela.data) *(.rela.gnu.linkonce.d*) }
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.rela.rodata :
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{ *(.rela.rodata) *(.rela.gnu.linkonce.r*) }
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.rela.got : { *(.rela.got) }
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.rela.got1 : { *(.rela.got1) }
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.rela.got2 : { *(.rela.got2) }
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.rela.ctors : { *(.rela.ctors) }
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.rela.dtors : { *(.rela.dtors) }
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.rela.init : { *(.rela.init) }
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.rela.fini : { *(.rela.fini) }
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.rela.bss : { *(.rela.bss) }
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.rela.plt : { *(.rela.plt) }
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.rela.sdata : { *(.rela.sdata) }
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.rela.sbss : { *(.rela.sbss) }
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.rela.sdata2 : { *(.rela.sdata2) }
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.rela.sbss2 : { *(.rela.sbss2) }
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.init : { *(.init) } =0
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.fini : { *(.fini) } =0
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.rodata : { *(.rodata) *(.gnu.linkonce.r*) }
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.rodata1 : { *(.rodata1) }
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.sdata2 : { *(.sdata2) }
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.sbss2 : { *(.sbss2) }
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/* Adjust the address for the data segment to the next page up. */
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. = ALIGN(4096);
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.data :
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{
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*(.data)
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*(.gnu.linkonce.d*)
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}
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.data1 : { *(.data1) }
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.toc1 : ALIGN(8) { *(.toc1) }
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.opd : ALIGN(8) { KEEP (*(.opd)) }
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.branch_lt : ALIGN(8) { *(.branch_lt) }
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. = ALIGN(4096);
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.got : ALIGN(8) { __tocbase = .; *(.got .toc) }
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.dynamic : { *(.dynamic) }
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/* Put .ctors and .dtors next to the .got2 section, so that the pointers
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get relocated with -mrelocatable. Also put in the .fixup pointers.
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The current compiler no longer needs this, but keep it around for 2.7.2 */
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PROVIDE (_GOT2_START_ = .);
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.got2 : { *(.got2) }
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PROVIDE (__CTOR_LIST__ = .);
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.ctors : { *(.ctors) }
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PROVIDE (__CTOR_END__ = .);
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PROVIDE (__DTOR_LIST__ = .);
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.dtors : { *(.dtors) }
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PROVIDE (__DTOR_END__ = .);
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PROVIDE (_FIXUP_START_ = .);
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.fixup : { *(.fixup) }
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PROVIDE (_FIXUP_END_ = .);
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PROVIDE (_GOT2_END_ = .);
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/* We want the small data sections together, so single-instruction offsets
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can access them all, and initialized data all before uninitialized, so
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we can shorten the on-disk segment size. */
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.sdata : { *(.sdata) }
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_edata = .;
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PROVIDE (edata = .);
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.sbss :
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{
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PROVIDE (__sbss_start = .);
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*(.sbss)
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*(.scommon)
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*(.dynsbss)
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PROVIDE (__sbss_end = .);
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}
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.plt : { *(.plt) }
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.bss :
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{
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PROVIDE (__bss_start = .);
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*(.dynbss)
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*(.bss)
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*(COMMON)
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}
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_end = . ;
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PROVIDE (end = .);
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/* Stabs debugging sections. */
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.stab 0 : { *(.stab) }
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.stabstr 0 : { *(.stabstr) }
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/* DWARF debug sections.
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Symbols in the DWARF debugging sections are relative to the beginning
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of the section so we begin them at 0. */
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/* DWARF 1 */
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.debug 0 : { *(.debug) }
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.line 0 : { *(.line) }
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/* GNU DWARF 1 extensions */
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.debug_srcinfo 0 : { *(.debug_srcinfo) }
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.debug_sfnames 0 : { *(.debug_sfnames) }
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/* DWARF 1.1 and DWARF 2 */
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.debug_aranges 0 : { *(.debug_aranges) }
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.debug_pubnames 0 : { *(.debug_pubnames) }
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/* DWARF 2 */
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.debug_info 0 : { *(.debug_info) }
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.debug_abbrev 0 : { *(.debug_abbrev) }
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.debug_line 0 : { *(.debug_line) }
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.debug_frame 0 : { *(.debug_frame) }
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.debug_str 0 : { *(.debug_str) }
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.debug_loc 0 : { *(.debug_loc) }
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.debug_macinfo 0 : { *(.debug_macinfo) }
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/* SGI/MIPS DWARF 2 extensions */
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.debug_weaknames 0 : { *(.debug_weaknames) }
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.debug_funcnames 0 : { *(.debug_funcnames) }
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.debug_typenames 0 : { *(.debug_typenames) }
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.debug_varnames 0 : { *(.debug_varnames) }
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/* These must appear regardless of . */
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}
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