448 lines
13 KiB
Python
448 lines
13 KiB
Python
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# Copyright (C) 2014-2022 Free Software Foundation, Inc.
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#
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# Copying and distribution of this file, with or without modification,
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# are permitted in any medium without royalty provided the copyright
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# notice and this notice are preserved.
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#
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# Unusual variables checked by this code:
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# NOP - four 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_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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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}:${MACHINE}; fi
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test "$LD_FLAG" = "N" && DATA_ADDR=.
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CTOR=".ctors ${CONSTRUCTING-0} :
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{
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${CONSTRUCTING+ PROVIDE (__CTOR_LIST__ = .); }
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${CONSTRUCTING+${CTOR_START}}
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KEEP (*(.ctors))
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${CONSTRUCTING+${CTOR_END}}
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${CONSTRUCTING+ PROVIDE(__CTOR_END__ = .); }
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} ${RELOCATING+ > ${TEXT_MEMORY}}"
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DTOR=" .dtors ${CONSTRUCTING-0} :
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{
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${CONSTRUCTING+ PROVIDE(__DTOR_LIST__ = .); }
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KEEP (*(.dtors))
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${CONSTRUCTING+ PROVIDE(__DTOR_END__ = .); }
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} ${RELOCATING+ > ${TEXT_MEMORY}}"
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VECTORS="
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/* If the 'vectors_addr' symbol is defined, it indicates the start address
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of interrupt vectors. This depends on the 68HC11 operating mode:
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Addr
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Single chip 0xffc0
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Extended mode 0xffc0
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Bootstrap 0x00c0
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Test 0xbfc0
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In general, the vectors address is 0xffc0. This can be overriden
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with the '-defsym vectors_addr=0xbfc0' ld option.
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Note: for the bootstrap mode, the interrupt vectors are at 0xbfc0 but
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they are redirected to 0x00c0 by the internal PROM. Application's vectors
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must also consist of jump instructions (see Motorola's manual). */
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PROVIDE (_vectors_addr = DEFINED (vectors_addr) ? vectors_addr : 0xffc0);
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.vectors DEFINED (vectors_addr) ? vectors_addr : 0xffc0 :
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{
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KEEP (*(.vectors))
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}"
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#
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# We provide two emulations: a fixed on that defines some memory banks
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# and a configurable one that includes a user provided memory definition.
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#
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case $GENERIC_BOARD in
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yes|1|YES)
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MEMORY_DEF="
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/* Get memory banks definition from some user configuration file.
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This file must be located in some linker directory (search path
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with -L<dir>). See fixed memory banks emulation script. */
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INCLUDE memory.x;
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"
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;;
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*)
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MEMORY_DEF="
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/* Fixed definition of the available memory banks.
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See generic emulation script for a user defined configuration. */
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MEMORY
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{
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page0 (rwx) : ORIGIN = 0x0, LENGTH = 256
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text (rx) : ORIGIN = ${ROM_START_ADDR}, LENGTH = ${ROM_SIZE}
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data : ORIGIN = ${RAM_START_ADDR}, LENGTH = ${RAM_SIZE}
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eeprom : ORIGIN = ${EEPROM_START_ADDR}, LENGTH = ${EEPROM_SIZE}
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}
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/* Setup the stack on the top of the data memory bank. */
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PROVIDE (_stack = ${RAM_START_ADDR} + ${RAM_SIZE} - 1);
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"
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;;
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esac
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STARTUP_CODE="
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/* Startup code. */
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KEEP (*(.install0)) /* Section should setup the stack pointer. */
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KEEP (*(.install1)) /* Place holder for applications. */
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KEEP (*(.install2)) /* Optional installation of data sections in RAM. */
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KEEP (*(.install3)) /* Place holder for applications. */
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KEEP (*(.install4)) /* Section that calls the main. */
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"
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FINISH_CODE="
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/* Finish code. */
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KEEP (*(.fini0)) /* Beginning of finish code (_exit symbol). */
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KEEP (*(.fini1)) /* Place holder for applications. */
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KEEP (*(.fini2)) /* C++ destructors. */
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KEEP (*(.fini3)) /* Place holder for applications. */
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KEEP (*(.fini4)) /* Runtime exit. */
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"
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PRE_COMPUTE_DATA_SIZE="
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/* SCz: this does not work yet... This is supposed to force the loading
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of _map_data.o (from libgcc.a) when the .data section is not empty.
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By doing so, this should bring the code that copies the .data section
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from ROM to RAM at init time.
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___pre_comp_data_size = SIZEOF(.data);
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__install_data_sections = ___pre_comp_data_size > 0 ?
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__map_data_sections : 0;
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*/
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"
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INSTALL_RELOC="
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.install0 0 : { *(.install0) }
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.install1 0 : { *(.install1) }
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.install2 0 : { *(.install2) }
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.install3 0 : { *(.install3) }
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.install4 0 : { *(.install4) }
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"
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FINISH_RELOC="
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.fini0 0 : { *(.fini0) }
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.fini1 0 : { *(.fini1) }
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.fini2 0 : { *(.fini2) }
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.fini3 0 : { *(.fini3) }
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.fini4 0 : { *(.fini4) }
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"
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BSS_DATA_RELOC="
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.data1 0 : { *(.data1) }
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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 0 : { *(.sdata) }
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.sbss 0 : { *(.sbss) }
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.scommon 0 : { *(.scommon) }
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"
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SOFT_REGS_RELOC="
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.softregs 0 : { *(.softregs) }
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"
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cat <<EOF
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/* Copyright (C) 2014-2022 Free Software Foundation, Inc.
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Copying and distribution of this script, with or without modification,
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are permitted in any medium without royalty provided the copyright
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notice and this notice are preserved. */
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${RELOCATING+/* Linker script for 68HC11 executable (PROM). */}
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${RELOCATING-/* Linker script for 68HC11 object file (ld -r). */}
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OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
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"${LITTLE_OUTPUT_FORMAT}")
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OUTPUT_ARCH(${OUTPUT_ARCH})
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${RELOCATING+ENTRY(${ENTRY})}
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${RELOCATING+${LIB_SEARCH_DIRS}}
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${RELOCATING+${EXECUTABLE_SYMBOLS}}
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${RELOCATING+${MEMORY_DEF}}
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SECTIONS
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{
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.hash ${RELOCATING-0} : { *(.hash) }
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.dynsym ${RELOCATING-0} : { *(.dynsym) }
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.dynstr ${RELOCATING-0} : { *(.dynstr) }
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.gnu.version ${RELOCATING-0} : { *(.gnu.version) }
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.gnu.version_d ${RELOCATING-0} : { *(.gnu.version_d) }
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.gnu.version_r ${RELOCATING-0} : { *(.gnu.version_r) }
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.rel.text ${RELOCATING-0} :
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{
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*(.rel.text)
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${RELOCATING+*(.rel.text.*)}
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${RELOCATING+*(.rel.gnu.linkonce.t.*)}
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}
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.rela.text ${RELOCATING-0} :
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{
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*(.rela.text)
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${RELOCATING+*(.rela.text.*)}
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${RELOCATING+*(.rela.gnu.linkonce.t.*)}
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}
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.rel.data ${RELOCATING-0} :
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{
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*(.rel.data)
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${RELOCATING+*(.rel.data.*)}
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${RELOCATING+*(.rel.gnu.linkonce.d.*)}
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}
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.rela.data ${RELOCATING-0} :
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{
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*(.rela.data)
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${RELOCATING+*(.rela.data.*)}
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${RELOCATING+*(.rela.gnu.linkonce.d.*)}
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}
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.rel.rodata ${RELOCATING-0} :
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{
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*(.rel.rodata)
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${RELOCATING+*(.rel.rodata.*)}
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${RELOCATING+*(.rel.gnu.linkonce.r.*)}
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}
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.rela.rodata ${RELOCATING-0} :
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{
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*(.rela.rodata)
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${RELOCATING+*(.rela.rodata.*)}
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${RELOCATING+*(.rela.gnu.linkonce.r.*)}
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}
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.rel.sdata ${RELOCATING-0} :
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{
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*(.rel.sdata)
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${RELOCATING+*(.rel.sdata.*)}
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${RELOCATING+*(.rel.gnu.linkonce.s.*)}
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}
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.rela.sdata ${RELOCATING-0} :
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{
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*(.rela.sdata)
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${RELOCATING+*(.rela.sdata.*)}
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${RELOCATING+*(.rela.gnu.linkonce.s.*)}
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}
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.rel.sbss ${RELOCATING-0} :
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{
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*(.rel.sbss)
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${RELOCATING+*(.rel.sbss.*)}
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${RELOCATING+*(.rel.gnu.linkonce.sb.*)}
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}
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.rela.sbss ${RELOCATING-0} :
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{
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*(.rela.sbss)
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${RELOCATING+*(.rela.sbss.*)}
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${RELOCATING+*(.rel.gnu.linkonce.sb.*)}
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}
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.rel.bss ${RELOCATING-0} :
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{
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*(.rel.bss)
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${RELOCATING+*(.rel.bss.*)}
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${RELOCATING+*(.rel.gnu.linkonce.b.*)}
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}
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.rela.bss ${RELOCATING-0} :
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{
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*(.rela.bss)
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${RELOCATING+*(.rela.bss.*)}
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${RELOCATING+*(.rela.gnu.linkonce.b.*)}
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}
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.rel.stext ${RELOCATING-0} : { *(.rel.stest) }
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.rela.stext ${RELOCATING-0} : { *(.rela.stest) }
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.rel.etext ${RELOCATING-0} : { *(.rel.etest) }
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.rela.etext ${RELOCATING-0} : { *(.rela.etest) }
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.rel.sdata ${RELOCATING-0} : { *(.rel.sdata) }
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.rela.sdata ${RELOCATING-0} : { *(.rela.sdata) }
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.rel.edata ${RELOCATING-0} : { *(.rel.edata) }
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.rela.edata ${RELOCATING-0} : { *(.rela.edata) }
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.rel.eit_v ${RELOCATING-0} : { *(.rel.eit_v) }
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.rela.eit_v ${RELOCATING-0} : { *(.rela.eit_v) }
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.rel.ebss ${RELOCATING-0} : { *(.rel.ebss) }
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.rela.ebss ${RELOCATING-0} : { *(.rela.ebss) }
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.rel.srodata ${RELOCATING-0} : { *(.rel.srodata) }
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.rela.srodata ${RELOCATING-0} : { *(.rela.srodata) }
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.rel.erodata ${RELOCATING-0} : { *(.rel.erodata) }
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.rela.erodata ${RELOCATING-0} : { *(.rela.erodata) }
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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.plt ${RELOCATING-0} : { *(.rel.plt) }
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.rela.plt ${RELOCATING-0} : { *(.rela.plt) }
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/* Concatenate .page0 sections. Put them in the page0 memory bank
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unless we are creating a relocatable file. */
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.page0 :
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{
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*(.page0)
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${RELOCATING+*(.softregs)}
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} ${RELOCATING+ > page0}
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/* Start of text section. */
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.stext ${RELOCATING-0} :
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{
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*(.stext)
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} ${RELOCATING+ > ${TEXT_MEMORY}}
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.init ${RELOCATING-0} :
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{
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KEEP (*(SORT_NONE(.init)))
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} ${RELOCATING+=${NOP-0}}
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${RELOCATING-${INSTALL_RELOC}}
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${RELOCATING-${FINISH_RELOC}}
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.text ${RELOCATING-0}:
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{
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/* Put startup code at beginning so that _start keeps same address. */
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${RELOCATING+${STARTUP_CODE}}
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*(.text)
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${RELOCATING+*(.text.*)}
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/* .gnu.warning sections are handled specially by elf.em. */
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*(.gnu.warning)
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${RELOCATING+*(.gnu.linkonce.t.*)}
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${RELOCATING+*(.tramp)}
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${RELOCATING+*(.tramp.*)}
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${RELOCATING+KEEP (*(SORT_NONE(.fini)))}
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${RELOCATING+${FINISH_CODE}}
|
||
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||
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${RELOCATING+_etext = .;}
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||
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${RELOCATING+PROVIDE (etext = .);}
|
||
|
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|
||
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} ${RELOCATING+ > ${TEXT_MEMORY}}
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||
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|
||
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.eh_frame ${RELOCATING-0} :
|
||
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{
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||
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KEEP (*(.eh_frame))
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||
|
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} ${RELOCATING+ > ${TEXT_MEMORY}}
|
||
|
|
|
||
|
|
.gcc_except_table ${RELOCATING-0} :
|
||
|
|
{
|
||
|
|
*(.gcc_except_table)
|
||
|
|
} ${RELOCATING+ > ${TEXT_MEMORY}}
|
||
|
|
|
||
|
|
.rodata ${RELOCATING-0} :
|
||
|
|
{
|
||
|
|
*(.rodata)
|
||
|
|
${RELOCATING+*(.rodata.*)}
|
||
|
|
${RELOCATING+*(.gnu.linkonce.r*)}
|
||
|
|
} ${RELOCATING+ > ${TEXT_MEMORY}}
|
||
|
|
|
||
|
|
.rodata1 ${RELOCATING-0} :
|
||
|
|
{
|
||
|
|
*(.rodata1)
|
||
|
|
} ${RELOCATING+ > ${TEXT_MEMORY}}
|
||
|
|
|
||
|
|
/* Constructor and destructor tables are in ROM. */
|
||
|
|
${RELOCATING+${CTOR}}
|
||
|
|
${RELOCATING+${DTOR}}
|
||
|
|
|
||
|
|
.jcr ${RELOCATING-0} :
|
||
|
|
{
|
||
|
|
KEEP (*(.jcr))
|
||
|
|
} ${RELOCATING+ > ${TEXT_MEMORY}}
|
||
|
|
|
||
|
|
/* Start of the data section image in ROM. */
|
||
|
|
${RELOCATING+__data_image = .;}
|
||
|
|
${RELOCATING+PROVIDE (__data_image = .);}
|
||
|
|
|
||
|
|
/* All read-only sections that normally go in PROM must be above.
|
||
|
|
We construct the DATA image section in PROM at end of all these
|
||
|
|
read-only sections. The data image must be copied at init time.
|
||
|
|
Refer to GNU ld, Section 3.6.8.2 Output Section LMA. */
|
||
|
|
.data ${RELOCATING-0} : ${RELOCATING+AT (__data_image)}
|
||
|
|
{
|
||
|
|
${RELOCATING+__data_section_start = .;}
|
||
|
|
${RELOCATING+PROVIDE (__data_section_start = .);}
|
||
|
|
|
||
|
|
${RELOCATING+${DATA_START_SYMBOLS}}
|
||
|
|
${RELOCATING+*(.sdata)}
|
||
|
|
*(.data)
|
||
|
|
${RELOCATING+*(.data.*)}
|
||
|
|
${RELOCATING+*(.data1)}
|
||
|
|
${RELOCATING+*(.gnu.linkonce.d.*)}
|
||
|
|
${CONSTRUCTING+CONSTRUCTORS}
|
||
|
|
|
||
|
|
${RELOCATING+_edata = .;}
|
||
|
|
${RELOCATING+PROVIDE (edata = .);}
|
||
|
|
} ${RELOCATING+ > ${DATA_MEMORY}}
|
||
|
|
|
||
|
|
${RELOCATING+__data_section_size = SIZEOF(.data);}
|
||
|
|
${RELOCATING+PROVIDE (__data_section_size = SIZEOF(.data));}
|
||
|
|
${RELOCATING+__data_image_end = __data_image + __data_section_size;}
|
||
|
|
|
||
|
|
${RELOCATING+${PRE_COMPUTE_DATA_SIZE}}
|
||
|
|
|
||
|
|
/* .install ${RELOCATING-0}:
|
||
|
|
{
|
||
|
|
. = _data_image_end;
|
||
|
|
} ${RELOCATING+ > ${TEXT_MEMORY}} */
|
||
|
|
|
||
|
|
/* Relocation for some bss and data sections. */
|
||
|
|
${RELOCATING-${BSS_DATA_RELOC}}
|
||
|
|
${RELOCATING-${SOFT_REGS_RELOC}}
|
||
|
|
|
||
|
|
.bss ${RELOCATING-0} :
|
||
|
|
{
|
||
|
|
${RELOCATING+__bss_start = .;}
|
||
|
|
${RELOCATING+*(.sbss)}
|
||
|
|
${RELOCATING+*(.scommon)}
|
||
|
|
${RELOCATING+*(.dynbss)}
|
||
|
|
*(.bss)
|
||
|
|
${RELOCATING+*(.bss.*)}
|
||
|
|
${RELOCATING+*(.gnu.linkonce.b.*)}
|
||
|
|
${RELOCATING+*(COMMON)}
|
||
|
|
${RELOCATING+PROVIDE (_end = .);}
|
||
|
|
} ${RELOCATING+ > ${DATA_MEMORY}}
|
||
|
|
${RELOCATING+__bss_size = SIZEOF(.bss);}
|
||
|
|
${RELOCATING+PROVIDE (__bss_size = SIZEOF(.bss));}
|
||
|
|
|
||
|
|
.eeprom ${RELOCATING-0} :
|
||
|
|
{
|
||
|
|
*(.eeprom)
|
||
|
|
${RELOCATING+*(.eeprom.*)}
|
||
|
|
} ${RELOCATING+ > ${EEPROM_MEMORY}}
|
||
|
|
|
||
|
|
${RELOCATING+${VECTORS}}
|
||
|
|
|
||
|
|
/* Stabs debugging sections. */
|
||
|
|
.stab 0 : { *(.stab) }
|
||
|
|
.stabstr 0 : { *(.stabstr) }
|
||
|
|
.stab.excl 0 : { *(.stab.excl) }
|
||
|
|
.stab.exclstr 0 : { *(.stab.exclstr) }
|
||
|
|
.stab.index 0 : { *(.stab.index) }
|
||
|
|
.stab.indexstr 0 : { *(.stab.indexstr) }
|
||
|
|
|
||
|
|
.comment 0 : { *(.comment) }
|
||
|
|
|
||
|
|
EOF
|
||
|
|
|
||
|
|
. $srcdir/scripttempl/DWARF.sc
|
||
|
|
|
||
|
|
cat <<EOF
|
||
|
|
}
|
||
|
|
EOF
|