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de386cf61f
binutils-gdb/ld/scripttempl/elfmips.sc
Ian Lance Taylor de386cf61f fix comment
1997-03-28 19:27:51 +00:00

208 lines
7.8 KiB
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#
# Unusual variables checked by this code:
# NOP - two byte opcode for no-op (defaults to 0)
# DATA_ADDR - if end-of-text-plus-one-page isn't right for data start
# OTHER_READONLY_SECTIONS - other than .text .init .rodata ...
# (e.g., .PARISC.milli)
# OTHER_READWRITE_SECTIONS - other than .data .bss .ctors .sdata ...
# (e.g., .PARISC.global)
# OTHER_SECTIONS - at the end
# EXECUTABLE_SYMBOLS - symbols that must be defined for an
# executable (e.g., _DYNAMIC_LINK)
# TEXT_START_SYMBOLS - symbols that appear at the start of the
# .text section.
# DATA_START_SYMBOLS - symbols that appear at the start of the
# .data section.
# OTHER_BSS_SYMBOLS - symbols that appear at the start of the
# .bss section besides __bss_start.
# EMBEDDED - whether this is for an embedded system.
#
# When adding sections, do note that the names of some sections are used
# when specifying the start address of the next.
#
# We use a start address of __start for Irix 5 and GNU/Linux/MIPS,
# _start for other targets. This is for compatibility with Irix 5,
# and with old MIPS ELF toolchains.
if [ -z "$ENTRY" ]; then
case "${target}" in
mips*-*-irix5*) ENTRY=__start ;;
mips*-*-linux*) ENTRY=__start ;;
*) ENTRY=_start ;;
esac
fi
# if this is for an embedded system, don't add SIZEOF_HEADERS.
if [ -z "$EMBEDDED" ]; then
test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR} + SIZEOF_HEADERS"
else
test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}"
fi
test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
test "$LD_FLAG" = "N" && DATA_ADDR=.
INTERP=".interp ${RELOCATING-0} : { *(.interp) }"
cat <<EOF
OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
"${LITTLE_OUTPUT_FORMAT}")
OUTPUT_ARCH(${ARCH})
ENTRY(${ENTRY})
${RELOCATING+${LIB_SEARCH_DIRS}}
${RELOCATING+/* Do we need any of these for elf?
__DYNAMIC = 0; ${STACKZERO+${STACKZERO}} ${SHLIB_PATH+${SHLIB_PATH}} */}
${RELOCATING+${EXECUTABLE_SYMBOLS}}
${RELOCATING- /* For some reason, the Solaris linker makes bad executables
if gld -r is used and the intermediate file has sections starting
at non-zero addresses. Could be a Solaris ld bug, could be a GNU ld
bug. But for now assigning the zero vmas works. */}
SECTIONS
{
/* Read-only sections, merged into text segment: */
${CREATE_SHLIB-${RELOCATING+. = ${TEXT_BASE_ADDRESS};}}
${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR} + SIZEOF_HEADERS;}}
${CREATE_SHLIB-${INTERP}}
.reginfo ${RELOCATING-0} : { *(.reginfo) }
.dynamic ${RELOCATING-0} : { *(.dynamic) }
.dynstr ${RELOCATING-0} : { *(.dynstr) }
.dynsym ${RELOCATING-0} : { *(.dynsym) }
.hash ${RELOCATING-0} : { *(.hash) }
.rel.text ${RELOCATING-0} :
{ *(.rel.text) *(.rel.gnu.linkonce.t*) }
.rela.text ${RELOCATING-0} :
{ *(.rela.text) *(.rela.gnu.linkonce.t*) }
.rel.data ${RELOCATING-0} :
{ *(.rel.data) *(.rel.gnu.linkonce.d*) }
.rela.data ${RELOCATING-0} :
{ *(.rela.data) *(.rela.gnu.linkonce.d*) }
.rel.rodata ${RELOCATING-0} :
{ *(.rel.rodata) *(.rel.gnu.linkonce.r*) }
.rela.rodata ${RELOCATING-0} :
{ *(.rela.rodata) *(.rela.gnu.linkonce.r*) }
.rel.got ${RELOCATING-0} : { *(.rel.got) }
.rela.got ${RELOCATING-0} : { *(.rela.got) }
.rel.ctors ${RELOCATING-0} : { *(.rel.ctors) }
.rela.ctors ${RELOCATING-0} : { *(.rela.ctors) }
.rel.dtors ${RELOCATING-0} : { *(.rel.dtors) }
.rela.dtors ${RELOCATING-0} : { *(.rela.dtors) }
.rel.init ${RELOCATING-0} : { *(.rel.init) }
.rela.init ${RELOCATING-0} : { *(.rela.init) }
.rel.fini ${RELOCATING-0} : { *(.rel.fini) }
.rela.fini ${RELOCATING-0} : { *(.rela.fini) }
.rel.bss ${RELOCATING-0} : { *(.rel.bss) }
.rela.bss ${RELOCATING-0} : { *(.rela.bss) }
.rel.plt ${RELOCATING-0} : { *(.rel.plt) }
.rela.plt ${RELOCATING-0} : { *(.rela.plt) }
.rodata ${RELOCATING-0} : { *(.rodata) *(.gnu.linkonce.r*) }
.rodata1 ${RELOCATING-0} : { *(.rodata1) }
.init ${RELOCATING-0} : { *(.init) } =${NOP-0}
.text ${RELOCATING-0} :
{
${RELOCATING+${TEXT_START_SYMBOLS}}
*(.text)
*(.stub)
/* .gnu.warning sections are handled specially by elf32.em. */
*(.gnu.warning)
${RELOCATING+*(.gnu.linkonce.t*)}
${RELOCATING+*(.mips16.fn.*)}
${RELOCATING+*(.mips16.call.*)}
} =${NOP-0}
${RELOCATING+_etext = .;}
${RELOCATING+PROVIDE (etext = .);}
.fini ${RELOCATING-0} : { *(.fini) } =${NOP-0}
/* Adjust the address for the data segment. We want to adjust up to
the same address within the page on the next page up. It would
be more correct to do this:
${RELOCATING+. = ${DATA_ADDR-ALIGN(${MAXPAGESIZE})
+ ((ALIGN(8) + ${MAXPAGESIZE} - ALIGN(${MAXPAGESIZE}))
& (${MAXPAGESIZE} - 1)};}
The current expression does not correctly handle the case of a
text segment ending precisely at the end of a page; it causes the
data segment to skip a page. The above expression does not have
this problem, but it will currently (2/95) cause BFD to allocate
a single segment, combining both text and data, for this case.
This will prevent the text segment from being shared among
multiple executions of the program; I think that is more
important than losing a page of the virtual address space (note
that no actual memory is lost; the page which is skipped can not
be referenced). */
${CREATE_SHLIB-${RELOCATING+. += ${DATA_ADDR} - ${TEXT_START_ADDR};}}
${CREATE_SHLIB-${RELOCATING+. += 0x10000;}}
${CREATE_SHLIB+${RELOCATING+. = ALIGN(${MAXPAGESIZE}) + (ALIGN(8) & (${MAXPAGESIZE} - 1));}}
.data ${RELOCATING-0} :
{
${RELOCATING+${DATA_START_SYMBOLS}}
*(.data)
*(.gnu.linkonce.d*)
${CONSTRUCTING+CONSTRUCTORS}
}
.data1 ${RELOCATING-0} : { *(.data1) }
.ctors ${RELOCATING-0} : { *(.ctors) }
.dtors ${RELOCATING-0} : { *(.dtors) }
${RELOCATING+${OTHER_GOT_SYMBOLS}}
.got ${RELOCATING-0} :
{
*(.got.plt) *(.got)
}
/* 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 ${RELOCATING-0} : { *(.sdata) }
${RELOCATING+${OTHER_READWRITE_SECTIONS}}
${RELOCATING+_edata = .;}
${RELOCATING+PROVIDE (edata = .);}
${RELOCATING+__bss_start = .;}
${RELOCATING+${OTHER_BSS_SYMBOLS}}
.sbss ${RELOCATING-0} : { *(.sbss) *(.scommon) }
.bss ${RELOCATING-0} :
{
*(.dynbss)
*(.bss)
*(COMMON)
}
${RELOCATING+_end = . ;}
${RELOCATING+PROVIDE (end = .);}
/* These are needed for ELF backends which have not yet been
converted to the new style linker. */
.stab 0 : { *(.stab) }
.stabstr 0 : { *(.stabstr) }
/* 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) }
.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) }
/* These must appear regardless of ${RELOCATING}. */
${OTHER_SECTIONS}
}
EOF
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