342 lines
9.9 KiB
Bash
342 lines
9.9 KiB
Bash
#!/bin/sh
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# genScript.sh
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#
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# a shell script to generate linker scripts.
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#
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# TODO:
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# 1. convenience labels like etext, edata, end, and wrs_kernel_*_{start,end}
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# are primarily used by ROM kernels and can most likely be omitted from RAM
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# kernels. But they're harmless and it makes script sharing easier.
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# 2. "classic" convenience labels (etext/edata/end) should be phased out in
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# favor of the newer ones. Further, DAT has requested that we make the new
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# names conform to wrsInitialCapitals style.
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# 3. Due to the template generation strategy employed here, the final output
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# may look a little awkwardly formatted and certainly is not as clean and
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# simple as the early versions of the Diab scripts. Suggestions welcome.
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# I actually think this might not be such a bad application for (gasp!) Tcl,
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# so a future Tcl rewrite (which also helps windows users) is possible.
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# 4. Currently GNU aligns everything to 16. This is probably overkill on many
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# chips, and especially once everyone is ELF, the internal section alignment
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# should take care of things -- except for convenience labels which need to
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# guarantee 4 byte alignment for use with copyLongs and fillLongs.
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# 5. General convergence...
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mod_history()
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{
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cat <<'EOF'
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/*
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modification history
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--------------------
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01r,25aug05,dlk Support .text.init, .text.fast, .data.init, .data.fast.
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01r,29jul05,slk SPR 104264: fix MIPS romResident images
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01q,06may05,rlg changes for MIPS specific devices
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01p,03jul04,f_b Improved support for data alignment
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01o,12dec03,sn added more .rodata.str1.* handlers
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01n,04dec03,sn Diab: .rodata.* is not handled correctly by Diab linker; instead
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use specific names
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01m,28oct03,sn Diab: collapse .rodata.cst* sections into .rodata
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01l,29may02,tpw Diab: pad out sections, needed for MIPS byteswap. SPR 78076
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01k,24apr02,sn GNU: SPR 75835 - added support for relocatable script link.OUT
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01j,19apr02,tpw Diab: provide _etext for ColdFire. SPR 75122
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01i,06feb02,sn Both: place .got2 to handle tramp.o (_x_gnu_tramp.o).
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01h,25jan02,tpw GNU: give debug sections explicit 0 addresses.
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01g,14jan02,tpw Diab: place .eh_frame data, in case of insistent GNU objects.
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01f,14dec01,tpw Diab: provide both underscore options of wrs_kernel* here too.
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01e,05dec01,tpw Both: Add .boot and .reset section support, for PPC 4xx series
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and Book E.
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01d,05dec01,tpw Diab: Add .frame_info section to text region.
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01c,03dec01,jab Diab: replaced LOAD() with AT()
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01b,14nov01,tpw ALL: Correct some more bootrom/kernel issues.
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01b,06nov01,tpw GNU: Add /DISCARD/ directive to discard uninteresting sections
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01a,01nov01,tpw gnu script written
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01a,29oct01,jab diab script written
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*/
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EOF
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}
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filename="$1"
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TOOL="$2"
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shift 2
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style="$*"
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align=16
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am1=`expr $align - 1`
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bind=""
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[ "$TOOL" = diab ] && bind=BIND
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dot_boot_text="
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.boot $bind(wrs_kernel_text_start + wrs_kernel_rom_size - 0x800) :
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{
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*(.boot)
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}
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.reset $bind(wrs_kernel_text_start + wrs_kernel_rom_size - 4) :
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{
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*(.reset)
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}
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"
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bind=""
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[ "$TOOL" = diab ] && bind=BIND
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kseg0data_text="
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.kseg0data $bind((_VX_START_TEXT - 0x7e00) & 0xbfffffff) :
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{
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*(.kseg0data)
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}
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"
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bind=""
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[ "$TOOL" = diab ] && bind=BIND
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kseg0data_data="
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.kseg0data $bind((_VX_START_DATA - 0x7e00) & 0xbfffffff) :
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{
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*(.kseg0data)
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}
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"
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diab_data_group_text=" }
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GROUP BIND(_VX_START_DATA) : {"
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diab_data_group_aligned=" }
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GROUP BIND((etext + _VX_DATA_ALIGN - 1) & -_VX_DATA_ALIGN) : {"
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gnu_data_group_aligned=" . = ALIGN(_VX_DATA_ALIGN);"
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named_debug_sections="
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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) }
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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_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) }
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.debug_varnames 0 : { *(.debug_varnames) }"
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rom_at=""
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dot_boot=""
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kseg0data=""
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gnu_data_group=""
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diab_data_group=""
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zero=""
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wrs_kernel_text_start="wrs_kernel_text_start = .; _wrs_kernel_text_start = .;"
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wrs_kernel_text_fast="wrs_kernel_text_fast = .; _wrs_kernel_text_fast = .;"
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wrs_kernel_text_init="wrs_kernel_text_init = .; _wrs_kernel_text_init = .;"
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wrs_kernel_text_end="wrs_kernel_text_end = .; _wrs_kernel_text_end = .;"
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etext="etext = .; _etext = .;"
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wrs_kernel_data_start="wrs_kernel_data_start = .; _wrs_kernel_data_start = .;"
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wrs_kernel_data_fast="wrs_kernel_data_fast = .; _wrs_kernel_data_fast = .;"
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wrs_kernel_data_init="wrs_kernel_data_init = .; _wrs_kernel_data_init = .;"
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wrs_kernel_data_end="wrs_kernel_data_end = .; _wrs_kernel_data_end = .;"
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edata="edata = .; _edata = .;"
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wrs_kernel_bss_start="wrs_kernel_bss_start = .; _wrs_kernel_bss_start = .;"
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wrs_kernel_bss_end="wrs_kernel_bss_end = .; _wrs_kernel_bss_end = .;"
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end="end = .; _end = .;"
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gp_mips_diab="_gp = ((. + $am1) & ~$am1) + 0x7ff0;"
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gp_mips_gnu="_gp = ALIGN(16) + 0x7ff0; /* set gp for MIPS startup code */"
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sec_align_diab=". = ((. + 3) & ~3);"
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sec_align_gnu=". = ALIGN($align);"
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for arg
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do
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case "$arg" in
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AOUT) named_debug_sections="" ;;
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ROM) diab_data_group="$diab_data_group_text" ;
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if [ "$kseg0data" != "" ]; then
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kseg0data="$kseg0data_data"
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fi
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rom_at=" AT(etext)" ;;
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RAM) gnu_data_group="$gnu_data_group_aligned" ;
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diab_data_group="$diab_data_group_aligned" ;;
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DOTBOOT) dot_boot="$dot_boot_text" ;;
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MIPS) kseg0data="$kseg0data_text" ;;
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OUT) zero="0"
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wrs_kernel_text_start=""
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wrs_kernel_text_fast=""
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wrs_kernel_text_init=""
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wrs_kernel_text_end=""
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etext=""
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wrs_kernel_data_start=""
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wrs_kernel_data_fast=""
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wrs_kernel_data_init=""
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wrs_kernel_data_end=""
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edata=""
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wrs_kernel_bss_start=""
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wrs_kernel_bss_end=""
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end=""
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gp_mips_gnu=""
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gp_mips_diab=""
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sec_align_gnu=""
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sec_align_diab=""
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;;
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*) echo "$0: '$arg' unknown." 1>&2 ; exit 1 ;;
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esac
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done
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cat <<EOF
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/* $filename - $TOOL linker command file for VxWorks: $style */
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/* Copyright 1984-2001 Wind River Systems, Inc. */
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/* This file was automatically generated using tool/common/ldscripts. */
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EOF
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mod_history
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if [ "$TOOL" = diab ]; then
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cat <<EOF
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SECTIONS {
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GROUP BIND(_VX_START_TEXT) : {
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.text (TEXT) : {
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$wrs_kernel_text_start
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*(.text)
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$wrs_kernel_text_fast
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*(.text.fast)
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$wrs_kernel_text_init
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*(.text.init)
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*(.rdata) *(.rodata) *(.rodata.cst8) *(.rodata.cst4) *(.rodata.str1.1) *(.rodata.str1.2) *(.rodata.str1.4) *(.rodata.str1.8) *(.rodata.str1.16) *(.rodata.str1.32) *(.rodata.str1.64) *(.rodata.str1.128) *(.rodata.str1.256)
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*(.init) *(.fini)
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*(.frame_info)
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*(.sdata2)
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$sec_align_diab
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}
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$sec_align_diab
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$etext
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$wrs_kernel_text_end
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$diab_data_group
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.data (DATA)$rom_at : {
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$wrs_kernel_data_start
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*(.data)
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$wrs_kernel_data_fast
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*(.data.fast)
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$wrs_kernel_data_init
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*(.data.init)
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*(.eh_frame) /* Some GNU objects insist on having .eh_frame data. */
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*(.ctors)
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*(.dtors)
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/* set gp for MIPS startup code */
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$gp_mips_diab
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*(.got2)
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*(.sdata)
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$sec_align_diab
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}
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$sec_align_diab
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$edata
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$wrs_kernel_data_end
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.bss (BSS) : {
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$wrs_kernel_bss_start
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*(.sbss)
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*(.bss)
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$sec_align_diab
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}
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$sec_align_diab
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$end
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$wrs_kernel_bss_end
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}
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$kseg0data$dot_boot}
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EOF
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else
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# presume $TOOL = gnu
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cat <<EOF
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ENTRY(_start)
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SECTIONS
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{
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.text $zero :
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{
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$wrs_kernel_text_start
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_VX_START_TEXT = .;
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*(.text)
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$wrs_kernel_text_fast
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*(.text.fast)
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$wrs_kernel_text_init
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*(.text.init)
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*(.text.*) *(.stub) *(.gnu.warning) *(.gnu.linkonce.t*)
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KEEP(*(.init)) KEEP(*(.fini))
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*(.glue_7t) *(.glue_7) *(.rdata) /* for ARM */
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*(.mips16.fn.*) *(.mips16.call.*) *(.reginfo) /* for MIPS */
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*(.rodata) *(.rodata.*) *(.gnu.linkonce.r*) *(.rodata1)
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*(.sdata2) *(.sbss2) /* for PPC */
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$sec_align_gnu
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}
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$sec_align_gnu
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$wrs_kernel_text_end
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$etext
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$gnu_data_group
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.data $zero :$rom_at
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{
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$wrs_kernel_data_start
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_VX_START_DATA = .;
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*(.data)
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$wrs_kernel_data_fast
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*(.data.fast)
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$wrs_kernel_data_init
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*(.data.init)
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*(.data.*) *(.gnu.linkonce.d*) SORT(CONSTRUCTORS) *(.data1)
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*(.eh_frame) *(.gcc_except_table)
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KEEP (*crtbegin.o(.ctors))
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KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
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KEEP (*(SORT(.ctors.*)))
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KEEP (*(.ctors))
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KEEP (*crtbegin.o(.dtors))
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KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
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KEEP (*(SORT(.dtors.*)))
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KEEP (*(.dtors))
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$gp_mips_gnu
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/* got*, dynamic, sdata*, lit[48], and sbss should follow _gp */
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*(.got.plt) *(.got) *(.dynamic)
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*(.got2)
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*(.sdata) *(.sdata.*) *(.lit8) *(.lit4)
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$sec_align_gnu
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}
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$sec_align_gnu
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$edata
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$wrs_kernel_data_end
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.bss $zero :
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{
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$wrs_kernel_bss_start
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*(.sbss) *(.scommon) *(.dynbss) *(.bss) *(COMMON)
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$sec_align_gnu
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}
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$sec_align_gnu
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$end
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$wrs_kernel_bss_end
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$kseg0data$dot_boot
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/DISCARD/ :
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{
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*(.note) /* seen on Pentium ELF */
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*(.comment) /* seen on PPC & SH ELF */
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*(.pdr) /* seen on MIPS ELF */
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}$named_debug_sections
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}
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EOF
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fi
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