9411e24df3
This is a general cleanup of the relocatable kernel support on powerpc, needed to enable kernel ifuncs. * Fix some relocatable issues in the kernel linker, and change to using a RELOCATABLE_KERNEL #define instead of #ifdef __powerpc__ for parts that other platforms can use in the future if they wish to have ET_DYN kernels. * Get rid of the DB_STOFFS hack now that the kernel is relocated to the DMAP properly across the board on powerpc64. * Add powerpc64 and powerpc32 ifunc functionality. * Allow AIM64 virtual mode OF kernels to run from the DMAP like other AIM64 by implementing a virtual mode restart. This fixes the runtime address on PowerMac G5. * Fix symbol relocation problems on post-relocation kernels by relocating the symbol table. * Add an undocumented method for supplying kernel symbols on powernv and other powerpc machines using linux-style kernel/initrd loading -- If you pass the kernel in as the initrd as well, the copy resident in initrd will be used as a source for symbols when initializing the debugger. This method is subject to removal once we have a better way of doing this. Approved by: jhibbits Relnotes: yes Sponsored by: Tag1 Consulting, Inc. Differential Revision: https://reviews.freebsd.org/D23156
156 lines
4.6 KiB
Plaintext
156 lines
4.6 KiB
Plaintext
/* $FreeBSD$ */
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OUTPUT_FORMAT("elf32-powerpc-freebsd", "elf32-powerpc-freebsd",
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"elf32-powerpc-freebsd")
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OUTPUT_ARCH(powerpc)
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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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PHDRS
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{
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kernel PT_LOAD;
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dynamic PT_DYNAMIC;
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}
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SECTIONS
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{
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/* Read-only sections, merged into text segment: */
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. = kernbase + SIZEOF_HEADERS;
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PROVIDE (begin = . - SIZEOF_HEADERS);
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.text :
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{
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*(.glink)
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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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} :kernel =0
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_etext = .;
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PROVIDE (etext = .);
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.interp : { *(.interp) }
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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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.note.gnu.build-id : {
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PROVIDE (__build_id_start = .);
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*(.note.gnu.build-id)
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PROVIDE (__build_id_end = .);
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}
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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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. = ((. + 0x1000) & ~(0x1000 - 1));
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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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.got1 : { *(.got1) }
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. = ALIGN(4096);
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.got : { *(.got) }
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.got.plt : { *(.got.plt) }
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.dynamic : { *(.dynamic) } :kernel :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) } :kernel
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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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