dfbd7790d4
we can switch to 64M-sized identity mappings and not having to map the first 64M. This is especially important because the first 1M contains the VGA frame buffer and is otherwise a legacy memory range. Best to make as little assumptions about it as possible. Switching to 64M-sized mappings is important to avoid creating overlapping translations, which have the side-effect of triggering machine checks. This is currently what's preventing us to boot on an Intel Tiger 4. Note that since we currently use 256M-sized identity mappings, we would reduce the size of the mappings and consequently increase the TLB pressure. The performance implications of this are minimal if measurable at all because identify mappings are not our primary means for memory management. Also note that there's no guarantee that physical memory exists at 64M. Then again, we didn't had the guarantee when we were loading at 5M. We'll deal with this when it's a problem. Discussed with: arun@
146 lines
4.9 KiB
Plaintext
146 lines
4.9 KiB
Plaintext
/* $FreeBSD$ */
|
|
OUTPUT_FORMAT("elf64-ia64-little", "elf64-ia64-little", "elf64-ia64-little")
|
|
OUTPUT_ARCH(ia64)
|
|
ENTRY(__start)
|
|
SEARCH_DIR(/usr/lib);
|
|
kernel_text = 0xe000000004000000;
|
|
SECTIONS
|
|
{
|
|
/* Read-only sections, merged into text segment: */
|
|
. = kernel_text + SIZEOF_HEADERS;
|
|
.interp : { *(.interp) }
|
|
.hash : { *(.hash) }
|
|
.dynsym : { *(.dynsym) }
|
|
.dynstr : { *(.dynstr) }
|
|
.gnu.version : { *(.gnu.version) }
|
|
.gnu.version_d : { *(.gnu.version_d) }
|
|
.gnu.version_r : { *(.gnu.version_r) }
|
|
.rela.init : { *(.rela.init) }
|
|
.rela.text : { *(.rela.text .rela.text.* .rela.gnu.linkonce.t.*) }
|
|
.rela.fini : { *(.rela.fini) }
|
|
.rela.rodata : { *(.rela.rodata .rela.rodata.* .rela.gnu.linkonce.r.*) }
|
|
.rela.data : { *(.rela.data .rela.data.* .rela.gnu.linkonce.d.*) }
|
|
.rela.ctors : { *(.rela.ctors) }
|
|
.rela.dtors : { *(.rela.dtors) }
|
|
.rela.got : { *(.rela.got) }
|
|
.rela.sdata : { *(.rela.sdata .rela.sdata.* .rela.gnu.linkonce.s.*) }
|
|
.rela.sbss : { *(.rela.sbss .rela.sbss.* .rela.gnu.linkonce.sb.*) }
|
|
.rela.sdata2 : { *(.rela.sdata2 .rela.sdata2.* .rela.gnu.linkonce.s2.*) }
|
|
.rela.sbss2 : { *(.rela.sbss2 .rela.sbss2.* .rela.gnu.linkonce.sb2.*) }
|
|
.rela.bss : { *(.rela.bss .rela.bss.* .rela.gnu.linkonce.b.*) }
|
|
.rela.plt : { *(.rela.plt) }
|
|
.rela.IA_64.pltoff : { *(.rela.IA_64.pltoff) }
|
|
.init :
|
|
{
|
|
*(.init)
|
|
} =0x00300000010070000002000001000400
|
|
.plt : { *(.plt) }
|
|
.text :
|
|
{
|
|
*(.text .stub .text.* .gnu.linkonce.t.*)
|
|
/* .gnu.warning sections are handled specially by elf32.em. */
|
|
*(.gnu.warning)
|
|
} =0x00300000010070000002000001000400
|
|
.fini :
|
|
{
|
|
*(.fini)
|
|
} =0x00300000010070000002000001000400
|
|
_etext = .;
|
|
PROVIDE (etext = .);
|
|
.rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
|
|
.rodata1 : { *(.rodata1) }
|
|
.sdata2 : { *(.sdata2 .sdata2.* .gnu.linkonce.s2.*) }
|
|
.sbss2 : { *(.sbss2 .sbss2.* .gnu.linkonce.sb2.*) }
|
|
.opd : { *(.opd) }
|
|
.IA_64.unwind_info : { *(.IA_64.unwind_info* .gnu.linkonce.ia64unwi.*) }
|
|
.IA_64.unwind : { *(.IA_64.unwind* .gnu.linkonce.ia64unw.*) }
|
|
/* Adjust the address for the data segment. We want to adjust up to
|
|
the same address within the page on the next page up. */
|
|
. = . + 8192;
|
|
.data :
|
|
{
|
|
*(.data.proc0 .data .data.* .gnu.linkonce.d.*)
|
|
SORT(CONSTRUCTORS)
|
|
}
|
|
.data1 : { *(.data1) }
|
|
.dynamic : { *(.dynamic) }
|
|
.ctors :
|
|
{
|
|
*(.ctors)
|
|
*(SORT(.ctors.*))
|
|
}
|
|
.dtors :
|
|
{
|
|
*(.dtors)
|
|
*(SORT(.dtors.*))
|
|
}
|
|
.got : { *(.got.plt) *(.got) }
|
|
.IA_64.pltoff : { *(.IA_64.pltoff) }
|
|
/* 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.*)
|
|
}
|
|
_edata = .;
|
|
PROVIDE (edata = .);
|
|
__bss_start = .;
|
|
.sbss :
|
|
{
|
|
PROVIDE (__sbss_start = .);
|
|
PROVIDE (___sbss_start = .);
|
|
*(.dynsbss)
|
|
*(.sbss .sbss.* .gnu.linkonce.sb.*)
|
|
*(.scommon)
|
|
PROVIDE (__sbss_end = .);
|
|
PROVIDE (___sbss_end = .);
|
|
}
|
|
.bss :
|
|
{
|
|
*(.dynbss)
|
|
*(.bss .bss.* .gnu.linkonce.b.*)
|
|
*(COMMON)
|
|
/* Align here to ensure that the .bss section occupies space up to
|
|
_end. Align after .bss to ensure correct alignment even if the
|
|
.bss section disappears because there are no input sections. */
|
|
. = ALIGN(64 / 8);
|
|
}
|
|
. = ALIGN(64 / 8);
|
|
_end = .;
|
|
PROVIDE (end = .);
|
|
/* 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 .gnu.linkonce.wi.*) }
|
|
.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) }
|
|
}
|