# # 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, _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 ;; *) 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) } .rela.text ${RELOCATING-0} : { *(.rela.text) } .rel.data ${RELOCATING-0} : { *(.rel.data) } .rela.data ${RELOCATING-0} : { *(.rela.data) } .rel.rodata ${RELOCATING-0} : { *(.rel.rodata) } .rela.rodata ${RELOCATING-0} : { *(.rela.rodata) } .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) } .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) } =${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). */ ${RELOCATING+. += ${DATA_ADDR} - ${TEXT_START_ADDR};} ${RELOCATING+. += 0x10000;} .data ${RELOCATING-0} : { ${RELOCATING+${DATA_START_SYMBOLS}} *(.data) ${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 .debug DWARF section are relative to the beginning of the section so we begin .debug at 0. It's not clear yet what needs to happen for the others. */ .debug 0 : { *(.debug) } .debug_info 0 : { *(.debug_info) } .debug_abbrev 0 : { *(.debug_abbrev) } .debug_line 0 : { *(.debug_line) } .debug_frame 0 : { *(.debug_frame) } .debug_srcinfo 0 : { *(.debug_srcinfo) } .debug_aranges 0 : { *(.debug_aranges) } .debug_pubnames 0 : { *(.debug_pubnames) } .debug_sfnames 0 : { *(.debug_sfnames) } .line 0 : { *(.line) } /* These must appear regardless of ${RELOCATING}. */ ${OTHER_SECTIONS} } EOF