ba916c8af2
* ldexp.h (segment_type): New type. (segments): New variable. * ldexp.c (segments): New variable. (exp_print_token): Handle SEGMENT_START. (fold_binary): Likewise. * ldgram.y (SEGMENT_START): Declare it as a token. (exp): Handle SEGMENT_START. * ldlang.h (lang_address_statement_type): Add segment field. (lang_section_start): Change prototype. * ldlang.c (map_input_to_output_sections): Do not process section assignments if a corresponding SEGMENT_START has already been seen. (lang_section_start): Add segment parameter. * ldlex.l (SEGMENT_START): Add it. * lexsup.c (seg_segment_start): New function. (parse_args): Use it for -Tbss, -Tdata, and -Ttext. * ld.texinfo (SEGMENT_START): Document it. * emulparams/armsymbian.sh (EMBEDDED): Set it. * scripttempl/armbpabi.sc: Use SEGMENT_START to control segment base addresses. Do not map relocations. * NEWS: Mention SEGMENT_START.
376 lines
14 KiB
Python
376 lines
14 KiB
Python
# This variant of elf.sc is used for ARM BPABI platforms, like Symbian
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# OS, where a separate postlinker will operated on the generated
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# executable or shared object. See elf.sc for configuration variables
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# that apply; only BPABI-specific variables will be noted here.
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test -z "$ENTRY" && ENTRY=_start
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test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
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test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
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if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi
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test -z "${ELFSIZE}" && ELFSIZE=32
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test -z "${ALIGNMENT}" && ALIGNMENT="${ELFSIZE} / 8"
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test "$LD_FLAG" = "N" && DATA_ADDR=.
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test -n "$CREATE_SHLIB$CREATE_PIE" && test -n "$SHLIB_DATA_ADDR" && COMMONPAGESIZE=""
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test -z "$CREATE_SHLIB$CREATE_PIE" && test -n "$DATA_ADDR" && COMMONPAGESIZE=""
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test -n "$RELRO_NOW" && unset SEPARATE_GOTPLT
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DATA_SEGMENT_ALIGN="ALIGN(${SEGMENT_SIZE}) + (. & (${MAXPAGESIZE} - 1))"
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DATA_SEGMENT_RELRO_END=""
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DATA_SEGMENT_RELRO_GOTPLT_END=""
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DATA_SEGMENT_END=""
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if test -n "${COMMONPAGESIZE}"; then
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DATA_SEGMENT_ALIGN="ALIGN (${SEGMENT_SIZE}) - ((${MAXPAGESIZE} - .) & (${MAXPAGESIZE} - 1)); . = DATA_SEGMENT_ALIGN (${MAXPAGESIZE}, ${COMMONPAGESIZE})"
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DATA_SEGMENT_END=". = DATA_SEGMENT_END (.);"
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if test -n "${SEPARATE_GOTPLT}"; then
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DATA_SEGMENT_RELRO_GOTPLT_END=". = DATA_SEGMENT_RELRO_END (. + ${SEPARATE_GOTPLT});"
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else
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DATA_SEGMENT_RELRO_END=". = DATA_SEGMENT_RELRO_END (.);"
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fi
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fi
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INTERP=".interp 0 : { *(.interp) }"
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PLT=".plt ${RELOCATING-0} : { *(.plt) }"
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RODATA=".rodata ${RELOCATING-0} : { *(.rodata${RELOCATING+ .rodata.* .gnu.linkonce.r.*}) }"
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DATARELRO=".data.rel.ro : { *(.data.rel.ro.local) *(.data.rel.ro*) }"
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STACKNOTE="/DISCARD/ : { *(.note.GNU-stack) }"
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if test -z "${NO_SMALL_DATA}"; then
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SBSS=".sbss ${RELOCATING-0} :
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{
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${RELOCATING+PROVIDE (__sbss_start = .);}
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${RELOCATING+PROVIDE (___sbss_start = .);}
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*(.dynsbss)
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*(.sbss${RELOCATING+ .sbss.* .gnu.linkonce.sb.*})
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*(.scommon)
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${RELOCATING+PROVIDE (__sbss_end = .);}
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${RELOCATING+PROVIDE (___sbss_end = .);}
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}"
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SBSS2=".sbss2 ${RELOCATING-0} : { *(.sbss2${RELOCATING+ .sbss2.* .gnu.linkonce.sb2.*}) }"
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SDATA="/* 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 ${RELOCATING-0} :
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{
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${RELOCATING+${SDATA_START_SYMBOLS}}
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*(.sdata${RELOCATING+ .sdata.* .gnu.linkonce.s.*})
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}"
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SDATA2=".sdata2 ${RELOCATING-0} : { *(.sdata2${RELOCATING+ .sdata2.* .gnu.linkonce.s2.*}) }"
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REL_SDATA=".rel.sdata ${RELOCATING-0} : { *(.rel.sdata${RELOCATING+ .rel.sdata.* .rel.gnu.linkonce.s.*}) }
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.rela.sdata ${RELOCATING-0} : { *(.rela.sdata${RELOCATING+ .rela.sdata.* .rela.gnu.linkonce.s.*}) }"
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REL_SBSS=".rel.sbss ${RELOCATING-0} : { *(.rel.sbss${RELOCATING+ .rel.sbss.* .rel.gnu.linkonce.sb.*}) }
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.rela.sbss ${RELOCATING-0} : { *(.rela.sbss${RELOCATING+ .rela.sbss.* .rela.gnu.linkonce.sb.*}) }"
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REL_SDATA2=".rel.sdata2 ${RELOCATING-0} : { *(.rel.sdata2${RELOCATING+ .rel.sdata2.* .rel.gnu.linkonce.s2.*}) }
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.rela.sdata2 ${RELOCATING-0} : { *(.rela.sdata2${RELOCATING+ .rela.sdata2.* .rela.gnu.linkonce.s2.*}) }"
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REL_SBSS2=".rel.sbss2 ${RELOCATING-0} : { *(.rel.sbss2${RELOCATING+ .rel.sbss2.* .rel.gnu.linkonce.sb2.*}) }
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.rela.sbss2 ${RELOCATING-0} : { *(.rela.sbss2${RELOCATING+ .rela.sbss2.* .rela.gnu.linkonce.sb2.*}) }"
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else
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NO_SMALL_DATA=" "
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fi
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test -n "$SEPARATE_GOTPLT" && SEPARATE_GOTPLT=" "
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CTOR=".ctors ${CONSTRUCTING-0} :
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{
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${CONSTRUCTING+${CTOR_START}}
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/* gcc uses crtbegin.o to find the start of
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the constructors, so we make sure it is
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first. Because this is a wildcard, it
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doesn't matter if the user does not
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actually link against crtbegin.o; the
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linker won't look for a file to match a
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wildcard. The wildcard also means that it
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doesn't matter which directory crtbegin.o
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is in. */
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KEEP (*crtbegin*.o(.ctors))
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/* We don't want to include the .ctor section from
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from the crtend.o file until after the sorted ctors.
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The .ctor section from the crtend file contains the
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end of ctors marker and it must be last */
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KEEP (*(EXCLUDE_FILE (*crtend*.o $OTHER_EXCLUDE_FILES) .ctors))
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KEEP (*(SORT(.ctors.*)))
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KEEP (*(.ctors))
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${CONSTRUCTING+${CTOR_END}}
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}"
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DTOR=".dtors ${CONSTRUCTING-0} :
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{
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${CONSTRUCTING+${DTOR_START}}
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KEEP (*crtbegin*.o(.dtors))
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KEEP (*(EXCLUDE_FILE (*crtend*.o $OTHER_EXCLUDE_FILES) .dtors))
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KEEP (*(SORT(.dtors.*)))
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KEEP (*(.dtors))
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${CONSTRUCTING+${DTOR_END}}
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}"
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STACK=" .stack ${RELOCATING-0}${RELOCATING+${STACK_ADDR}} :
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{
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${RELOCATING+_stack = .;}
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*(.stack)
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}"
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TEXT_START_ADDR="SEGMENT_START(\"text\", ${TEXT_START_ADDR})"
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SHLIB_TEXT_START_ADDR="SEGMENT_START(\"text\", ${SHLIB_TEXT_START_ADDR:-0})"
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DATA_ADDR="SEGMENT_START(\"data\", ${DATA_ADDR-${DATA_SEGMENT_ALIGN}})"
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SHLIB_DATA_ADDR="SEGMENT_START(\"data\", ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}})"
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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="${TEXT_START_ADDR} + SIZEOF_HEADERS"
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SHLIB_BASE_ADDRESS="${SHLIB_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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SHLIB_BASE_ADDRESS="${SHLIB_TEXT_START_ADDR}"
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fi
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cat <<EOF
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OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
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"${LITTLE_OUTPUT_FORMAT}")
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OUTPUT_ARCH(${OUTPUT_ARCH})
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ENTRY(${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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${RELOCATING+${INPUT_FILES}}
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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-${CREATE_PIE-${RELOCATING+PROVIDE (__executable_start = ${TEXT_START_ADDR}); . = ${TEXT_BASE_ADDRESS};}}}
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${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_BASE_ADDRESS};}}
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${CREATE_PIE+${RELOCATING+. = ${SHLIB_BASE_ADDRESS};}}
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${INITIAL_READONLY_SECTIONS}
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EOF
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cat <<EOF
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.init ${RELOCATING-0} :
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{
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${RELOCATING+${INIT_START}}
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KEEP (*(.init))
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${RELOCATING+${INIT_END}}
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} =${NOP-0}
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${DATA_PLT-${BSS_PLT-${PLT}}}
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.text ${RELOCATING-0} :
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{
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${RELOCATING+${TEXT_START_SYMBOLS}}
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*(.text .stub${RELOCATING+ .text.* .gnu.linkonce.t.*})
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KEEP (*(.text.*personality*))
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/* .gnu.warning sections are handled specially by elf32.em. */
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*(.gnu.warning)
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${RELOCATING+${OTHER_TEXT_SECTIONS}}
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} =${NOP-0}
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.fini ${RELOCATING-0} :
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{
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${RELOCATING+${FINI_START}}
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KEEP (*(.fini))
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${RELOCATING+${FINI_END}}
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} =${NOP-0}
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${RELOCATING+PROVIDE (__etext = .);}
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${RELOCATING+PROVIDE (_etext = .);}
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${RELOCATING+PROVIDE (etext = .);}
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${WRITABLE_RODATA-${RODATA}}
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.rodata1 ${RELOCATING-0} : { *(.rodata1) }
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${CREATE_SHLIB-${SDATA2}}
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${CREATE_SHLIB-${SBSS2}}
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${OTHER_READONLY_SECTIONS}
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.eh_frame_hdr : { *(.eh_frame_hdr) }
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.eh_frame ${RELOCATING-0} : ONLY_IF_RO { KEEP (*(.eh_frame)) }
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.gcc_except_table ${RELOCATING-0} : ONLY_IF_RO { KEEP (*(.gcc_except_table)) *(.gcc_except_table.*) }
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/* Adjust the address for the data segment. We want to adjust up to
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the same address within the page on the next page up. */
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${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+. = ${DATA_ADDR};}}}
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${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_DATA_ADDR};}}
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${CREATE_PIE+${RELOCATING+. = ${SHLIB_DATA_ADDR};}}
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/* Exception handling */
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.eh_frame ${RELOCATING-0} : ONLY_IF_RW { KEEP (*(.eh_frame)) }
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.gcc_except_table ${RELOCATING-0} : ONLY_IF_RW { KEEP (*(.gcc_except_table)) *(.gcc_except_table.*) }
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/* Thread Local Storage sections */
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.tdata ${RELOCATING-0} : { *(.tdata${RELOCATING+ .tdata.* .gnu.linkonce.td.*}) }
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.tbss ${RELOCATING-0} : { *(.tbss${RELOCATING+ .tbss.* .gnu.linkonce.tb.*})${RELOCATING+ *(.tcommon)} }
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/* Ensure the __preinit_array_start label is properly aligned. We
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could instead move the label definition inside the section, but
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the linker would then create the section even if it turns out to
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be empty, which isn't pretty. */
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${RELOCATING+. = ALIGN(${ALIGNMENT});}
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${RELOCATING+${CREATE_SHLIB-PROVIDE (__preinit_array_start = .);}}
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.preinit_array ${RELOCATING-0} : { *(.preinit_array) }
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${RELOCATING+${CREATE_SHLIB-PROVIDE (__preinit_array_end = .);}}
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${RELOCATING+${CREATE_SHLIB-PROVIDE (__init_array_start = .);}}
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.init_array ${RELOCATING-0} : { *(.init_array) }
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${RELOCATING+${CREATE_SHLIB-PROVIDE (__init_array_end = .);}}
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${RELOCATING+${CREATE_SHLIB-PROVIDE (__fini_array_start = .);}}
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.fini_array ${RELOCATING-0} : { *(.fini_array) }
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${RELOCATING+${CREATE_SHLIB-PROVIDE (__fini_array_end = .);}}
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${RELOCATING+${CTOR}}
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${RELOCATING+${DTOR}}
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.jcr ${RELOCATING-0} : { KEEP (*(.jcr)) }
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${RELOCATING+${DATARELRO}}
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${OTHER_RELRO_SECTIONS}
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${RELOCATING+${DATA_SEGMENT_RELRO_END}}
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${DATA_PLT+${PLT_BEFORE_GOT-${PLT}}}
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.data ${RELOCATING-0} :
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{
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${RELOCATING+${DATA_START_SYMBOLS}}
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*(.data${RELOCATING+ .data.* .gnu.linkonce.d.*})
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|
KEEP (*(.gnu.linkonce.d.*personality*))
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${CONSTRUCTING+SORT(CONSTRUCTORS)}
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}
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.data1 ${RELOCATING-0} : { *(.data1) }
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${WRITABLE_RODATA+${RODATA}}
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${OTHER_READWRITE_SECTIONS}
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${DATA_PLT+${PLT_BEFORE_GOT+${PLT}}}
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${CREATE_SHLIB+${SDATA2}}
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${CREATE_SHLIB+${SBSS2}}
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${SDATA}
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${OTHER_SDATA_SECTIONS}
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|
${RELOCATING+_edata = .;}
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${RELOCATING+PROVIDE (edata = .);}
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${RELOCATING+. = DEFINED(__bss_segment_start) ? __bss_segment_start : .;}
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${RELOCATING+__bss_start = .;}
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${RELOCATING+${OTHER_BSS_SYMBOLS}}
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${SBSS}
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${BSS_PLT+${PLT}}
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.bss ${RELOCATING-0} :
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{
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*(.dynbss)
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*(.bss${RELOCATING+ .bss.* .gnu.linkonce.b.*})
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*(COMMON)
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/* Align here to ensure that the .bss section occupies space up to
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_end. Align after .bss to ensure correct alignment even if the
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.bss section disappears because there are no input sections. */
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${RELOCATING+. = ALIGN(${ALIGNMENT});}
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}
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${OTHER_BSS_SECTIONS}
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${RELOCATING+. = ALIGN(${ALIGNMENT});}
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${RELOCATING+_end = .;}
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${RELOCATING+${OTHER_BSS_END_SYMBOLS}}
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${RELOCATING+PROVIDE (end = .);}
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${RELOCATING+${DATA_SEGMENT_END}}
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/* These sections are not mapped under the BPABI. */
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.dynamic 0 : { *(.dynamic) }
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.hash 0 : { *(.hash) }
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.dynsym 0 : { *(.dynsym) }
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.dynstr 0 : { *(.dynstr) }
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.gnu.version 0 : { *(.gnu.version) }
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.gnu.version_d 0: { *(.gnu.version_d) }
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.gnu.version_r 0: { *(.gnu.version_r) }
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${CREATE_SHLIB-${INTERP}}
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/* Stabs debugging sections. */
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.stab 0 : { *(.stab) }
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|
.stabstr 0 : { *(.stabstr) }
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.stab.excl 0 : { *(.stab.excl) }
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.stab.exclstr 0 : { *(.stab.exclstr) }
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.stab.index 0 : { *(.stab.index) }
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.stab.indexstr 0 : { *(.stab.indexstr) }
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.comment 0 : { *(.comment) }
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/* DWARF debug sections.
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Symbols in the DWARF debugging sections are relative to the beginning
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of the section so we begin them at 0. */
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/* DWARF 1 */
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.debug 0 : { *(.debug) }
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.line 0 : { *(.line) }
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/* GNU DWARF 1 extensions */
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.debug_srcinfo 0 : { *(.debug_srcinfo) }
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.debug_sfnames 0 : { *(.debug_sfnames) }
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/* DWARF 1.1 and DWARF 2 */
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.debug_aranges 0 : { *(.debug_aranges) }
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.debug_pubnames 0 : { *(.debug_pubnames) }
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/* DWARF 2 */
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.debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
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.debug_abbrev 0 : { *(.debug_abbrev) }
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.debug_line 0 : { *(.debug_line) }
|
|
.debug_frame 0 : { *(.debug_frame) }
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.debug_str 0 : { *(.debug_str) }
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.debug_loc 0 : { *(.debug_loc) }
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.debug_macinfo 0 : { *(.debug_macinfo) }
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/* SGI/MIPS DWARF 2 extensions */
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|
.debug_weaknames 0 : { *(.debug_weaknames) }
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.debug_funcnames 0 : { *(.debug_funcnames) }
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|
.debug_typenames 0 : { *(.debug_typenames) }
|
|
.debug_varnames 0 : { *(.debug_varnames) }
|
|
|
|
${STACK_ADDR+${STACK}}
|
|
${OTHER_SECTIONS}
|
|
${RELOCATING+${OTHER_END_SYMBOLS}}
|
|
${RELOCATING+${STACKNOTE}}
|
|
EOF
|
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|
|
# These relocations sections are part of the read-only segment in SVR4
|
|
# executables, but are not mapped in BPABI executables.
|
|
if [ "x$COMBRELOC" = x ]; then
|
|
COMBRELOCCAT=cat
|
|
else
|
|
COMBRELOCCAT="cat > $COMBRELOC"
|
|
fi
|
|
eval $COMBRELOCCAT <<EOF
|
|
.rel.init 0 : { *(.rel.init) }
|
|
.rela.init 0 : { *(.rela.init) }
|
|
.rel.text 0 : { *(.rel.text${RELOCATING+ .rel.text.* .rel.gnu.linkonce.t.*}) }
|
|
.rela.text 0 : { *(.rela.text${RELOCATING+ .rela.text.* .rela.gnu.linkonce.t.*}) }
|
|
.rel.fini 0 : { *(.rel.fini) }
|
|
.rela.fini 0 : { *(.rela.fini) }
|
|
.rel.rodata 0 : { *(.rel.rodata${RELOCATING+ .rel.rodata.* .rel.gnu.linkonce.r.*}) }
|
|
.rela.rodata 0 : { *(.rela.rodata${RELOCATING+ .rela.rodata.* .rela.gnu.linkonce.r.*}) }
|
|
${OTHER_READONLY_RELOC_SECTIONS}
|
|
.rel.data.rel.ro 0 : { *(.rel.data.rel.ro${RELOCATING+*}) }
|
|
.rela.data.rel.ro 0 : { *(.rel.data.rel.ro${RELOCATING+*}) }
|
|
.rel.data 0 : { *(.rel.data${RELOCATING+ .rel.data.* .rel.gnu.linkonce.d.*}) }
|
|
.rela.data 0 : { *(.rela.data${RELOCATING+ .rela.data.* .rela.gnu.linkonce.d.*}) }
|
|
.rel.tdata 0 : { *(.rel.tdata${RELOCATING+ .rel.tdata.* .rel.gnu.linkonce.td.*}) }
|
|
.rela.tdata 0 : { *(.rela.tdata${RELOCATING+ .rela.tdata.* .rela.gnu.linkonce.td.*}) }
|
|
.rel.tbss 0 : { *(.rel.tbss${RELOCATING+ .rel.tbss.* .rel.gnu.linkonce.tb.*}) }
|
|
.rela.tbss 0 : { *(.rela.tbss${RELOCATING+ .rela.tbss.* .rela.gnu.linkonce.tb.*}) }
|
|
.rel.ctors 0 : { *(.rel.ctors) }
|
|
.rela.ctors 0 : { *(.rela.ctors) }
|
|
.rel.dtors 0 : { *(.rel.dtors) }
|
|
.rela.dtors 0 : { *(.rela.dtors) }
|
|
${REL_SDATA}
|
|
${REL_SBSS}
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|
${REL_SDATA2}
|
|
${REL_SBSS2}
|
|
.rel.bss 0 : { *(.rel.bss${RELOCATING+ .rel.bss.* .rel.gnu.linkonce.b.*}) }
|
|
.rela.bss 0 : { *(.rela.bss${RELOCATING+ .rela.bss.* .rela.gnu.linkonce.b.*}) }
|
|
EOF
|
|
if [ -n "$COMBRELOC" ]; then
|
|
cat <<EOF
|
|
.rel.dyn 0 :
|
|
{
|
|
EOF
|
|
sed -e '/^[ ]*[{}][ ]*$/d;/:[ ]*$/d;/\.rela\./d;s/^.*: { *\(.*\)}$/ \1/' $COMBRELOC
|
|
cat <<EOF
|
|
}
|
|
.rela.dyn 0 :
|
|
{
|
|
EOF
|
|
sed -e '/^[ ]*[{}][ ]*$/d;/:[ ]*$/d;/\.rel\./d;s/^.*: { *\(.*\)}/ \1/' $COMBRELOC
|
|
cat <<EOF
|
|
}
|
|
EOF
|
|
fi
|
|
cat <<EOF
|
|
.rel.plt 0 : { *(.rel.plt) }
|
|
.rela.plt 0 : { *(.rela.plt) }
|
|
${OTHER_PLT_RELOC_SECTIONS}
|
|
}
|
|
EOF
|