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[src/trunk]: src/sys/arch/i386/stand/boot Provide a boot ldscript that puts t...
details: https://anonhg.NetBSD.org/src/rev/5e5d13d26f1d
branches: trunk
changeset: 325635:5e5d13d26f1d
user: christos <christos%NetBSD.org@localhost>
date: Wed Jan 01 22:05:48 2014 +0000
description:
Provide a boot ldscript that puts the text.unlikely section after the text
section so that boot_start gets placed first. We also set the entry and the
start address, although we still override them from the command line.
This is a copy of elf_i386.xbn
diffstat:
sys/arch/i386/stand/boot/boot.ldscript | 200 +++++++++++++++++++++++++++++++++
1 files changed, 200 insertions(+), 0 deletions(-)
diffs (204 lines):
diff -r 42c285872381 -r 5e5d13d26f1d sys/arch/i386/stand/boot/boot.ldscript
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/i386/stand/boot/boot.ldscript Wed Jan 01 22:05:48 2014 +0000
@@ -0,0 +1,200 @@
+/* Script for -N: mix text and data on same page; don't align data */
+OUTPUT_FORMAT("elf32-i386", "elf32-i386",
+ "elf32-i386")
+OUTPUT_ARCH(i386)
+ENTRY(boot_start)
+SEARCH_DIR("=/usr/lib/i386");
+SECTIONS
+{
+ /* Read-only sections, merged into text segment: */
+ PROVIDE (__executable_start = SEGMENT_START("text-segment", 0)); . = SEGMENT_START("text-segment", 0) + SIZEOF_HEADERS;
+ .interp : { *(.interp) }
+ .note.gnu.build-id : { *(.note.gnu.build-id) }
+ .hash : { *(.hash) }
+ .gnu.hash : { *(.gnu.hash) }
+ .dynsym : { *(.dynsym) }
+ .dynstr : { *(.dynstr) }
+ .gnu.version : { *(.gnu.version) }
+ .gnu.version_d : { *(.gnu.version_d) }
+ .gnu.version_r : { *(.gnu.version_r) }
+ .rel.init : { *(.rel.init) }
+ .rel.text : { *(.rel.text .rel.text.* .rel.gnu.linkonce.t.*) }
+ .rel.fini : { *(.rel.fini) }
+ .rel.rodata : { *(.rel.rodata .rel.rodata.* .rel.gnu.linkonce.r.*) }
+ .rel.data.rel.ro : { *(.rel.data.rel.ro .rel.data.rel.ro.* .rel.gnu.linkonce.d.rel.ro.*) }
+ .rel.data : { *(.rel.data .rel.data.* .rel.gnu.linkonce.d.*) }
+ .rel.tdata : { *(.rel.tdata .rel.tdata.* .rel.gnu.linkonce.td.*) }
+ .rel.tbss : { *(.rel.tbss .rel.tbss.* .rel.gnu.linkonce.tb.*) }
+ .rel.ctors : { *(.rel.ctors) }
+ .rel.dtors : { *(.rel.dtors) }
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+ .rel.bss : { *(.rel.bss .rel.bss.* .rel.gnu.linkonce.b.*) }
+ .rel.ifunc : { *(.rel.ifunc) }
+ .rel.plt :
+ {
+ *(.rel.plt)
+ PROVIDE_HIDDEN (__rel_iplt_start = .);
+ *(.rel.iplt)
+ PROVIDE_HIDDEN (__rel_iplt_end = .);
+ }
+ .init :
+ {
+ KEEP (*(SORT_NONE(.init)))
+ }
+ .plt : { *(.plt) *(.iplt) }
+ .text :
+ {
+ PROVIDE_HIDDEN (__eprol = .);
+ *(.text .stub .text.* .gnu.linkonce.t.*)
+ *(.text.unlikely .text.*_unlikely)
+ *(.text.exit .text.exit.*)
+ *(.text.startup .text.startup.*)
+ *(.text.hot .text.hot.*)
+ /* .gnu.warning sections are handled specially by elf32.em. */
+ *(.gnu.warning)
+ }
+ .fini :
+ {
+ KEEP (*(SORT_NONE(.fini)))
+ }
+ PROVIDE (__etext = .);
+ PROVIDE (_etext = .);
+ PROVIDE (etext = .);
+ .rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
+ .rodata1 : { *(.rodata1) }
+ .eh_frame_hdr : { *(.eh_frame_hdr) }
+ .eh_frame : ONLY_IF_RO { KEEP (*(.eh_frame)) }
+ .gcc_except_table : ONLY_IF_RO { *(.gcc_except_table
+ .gcc_except_table.*) }
+ /* These sections are generated by the Sun/Oracle C++ compiler. */
+ .exception_ranges : ONLY_IF_RO { *(.exception_ranges
+ .exception_ranges*) }
+ /* Adjust the address for the data segment. We want to adjust up to
+ the same address within the page on the next page up. */
+ . = .;
+ /* Exception handling */
+ .eh_frame : ONLY_IF_RW { KEEP (*(.eh_frame)) }
+ .gcc_except_table : ONLY_IF_RW { *(.gcc_except_table .gcc_except_table.*) }
+ .exception_ranges : ONLY_IF_RW { *(.exception_ranges .exception_ranges*) }
+ /* Thread Local Storage sections */
+ .tdata : { *(.tdata .tdata.* .gnu.linkonce.td.*) }
+ .tbss : { *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon) }
+ .preinit_array :
+ {
+ PROVIDE_HIDDEN (__preinit_array_start = .);
+ KEEP (*(.preinit_array))
+ PROVIDE_HIDDEN (__preinit_array_end = .);
+ }
+ .init_array :
+ {
+ PROVIDE_HIDDEN (__init_array_start = .);
+ KEEP (*(SORT(.init_array.*)))
+ KEEP (*(.init_array))
+ PROVIDE_HIDDEN (__init_array_end = .);
+ }
+ .fini_array :
+ {
+ PROVIDE_HIDDEN (__fini_array_start = .);
+ KEEP (*(SORT(.fini_array.*)))
+ KEEP (*(.fini_array))
+ PROVIDE_HIDDEN (__fini_array_end = .);
+ }
+ .ctors :
+ {
+ /* gcc uses crtbegin.o to find the start of
+ the constructors, so we make sure it is
+ first. Because this is a wildcard, it
+ doesn't matter if the user does not
+ actually link against crtbegin.o; the
+ linker won't look for a file to match a
+ wildcard. The wildcard also means that it
+ doesn't matter which directory crtbegin.o
+ is in. */
+ KEEP (*crtbegin.o(.ctors))
+ KEEP (*crtbegin?.o(.ctors))
+ /* We don't want to include the .ctor section from
+ the crtend.o file until after the sorted ctors.
+ The .ctor section from the crtend file contains the
+ end of ctors marker and it must be last */
+ KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
+ KEEP (*(SORT(.ctors.*)))
+ KEEP (*(.ctors))
+ }
+ .dtors :
+ {
+ KEEP (*crtbegin.o(.dtors))
+ KEEP (*crtbegin?.o(.dtors))
+ KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
+ KEEP (*(SORT(.dtors.*)))
+ KEEP (*(.dtors))
+ }
+ .jcr : { KEEP (*(.jcr)) }
+ .data.rel.ro : { *(.data.rel.ro.local* .gnu.linkonce.d.rel.ro.local.*) *(.data.rel.ro .data.rel.ro.* .gnu.linkonce.d.rel.ro.*) }
+ .dynamic : { *(.dynamic) }
+ .got : { *(.got) *(.igot) }
+ .got.plt : { *(.got.plt) *(.igot.plt) }
+ .data :
+ {
+ *(.data .data.* .gnu.linkonce.d.*)
+ SORT(CONSTRUCTORS)
+ }
+ .data1 : { *(.data1) }
+ _edata = .; PROVIDE (edata = .);
+ . = .;
+ __bss_start = .;
+ .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.
+ FIXME: Why do we need it? When there is no .bss section, we don't
+ pad the .data section. */
+ . = ALIGN(. != 0 ? 32 / 8 : 1);
+ }
+ . = ALIGN(32 / 8);
+ . = ALIGN(32 / 8);
+ _end = .; PROVIDE (end = .);
+ /* Stabs debugging sections. */
+ .stab 0 : { *(.stab) }
+ .stabstr 0 : { *(.stabstr) }
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+ .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 */
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+ .debug_pubnames 0 : { *(.debug_pubnames) }
+ /* DWARF 2 */
+ .debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
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+ .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) }
+ /* DWARF 3 */
+ .debug_pubtypes 0 : { *(.debug_pubtypes) }
+ .debug_ranges 0 : { *(.debug_ranges) }
+ /* DWARF Extension. */
+ .debug_macro 0 : { *(.debug_macro) }
+ .gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }
+ /DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) *(.gnu.lto_*) }
+}
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