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