ld/emulparams/elf32bmipn32-defs.sh

   1 # If you change this file, please also look at files which source this one:
   2 # elf64bmip.sh elf64btsmip.sh elf32btsmipn32.sh elf32bmipn32.sh
   3
   4 # This is an ELF platform.
   5 SCRIPT_NAME=elf
   6
   7 # Handle both big- and little-ended 32-bit MIPS objects.
   8 ARCH=mips
   9 OUTPUT_FORMAT="elf32-bigmips"
  10 BIG_OUTPUT_FORMAT="elf32-bigmips"
  11 LITTLE_OUTPUT_FORMAT="elf32-littlemips"
  12
  13 TEMPLATE_NAME=elf
  14 EXTRA_EM_FILE=mipself
  15
  16 # Note: use "x$var" not x"$var" in case directive in order to work around bug in bash 4.2
  17 case "x$EMULATION_NAME" in
  18 xelf32*n32*) ELFSIZE=32 ;;
  19 xelf64*) ELFSIZE=64 ;;
  20 x) ;;
  21 *) echo $0: unhandled emulation $EMULATION_NAME >&2; exit 1 ;;
  22 esac
  23
  24 if test `echo "$host" | sed -e s/64//` = `echo "$target" | sed -e s/64//`; then
  25   case " $EMULATION_LIBPATH " in
  26     *" ${EMULATION_NAME} "*)
  27       NATIVE=yes
  28       ;;
  29   esac
  30 fi
  31
  32 # Look for 64 bit target libraries in /lib64, /usr/lib64 etc., first.
  33 LIBPATH_SUFFIX=$ELFSIZE
  34
  35 GENERATE_SHLIB_SCRIPT=yes
  36 GENERATE_PIE_SCRIPT=yes
  37
  38 TEXT_START_ADDR=0x10000000
  39 MAXPAGESIZE="CONSTANT (MAXPAGESIZE)"
  40 ENTRY=__start
  41
  42 # Unlike most targets, the MIPS backend puts all dynamic relocations
  43 # in a single dynobj section, which it also calls ".rel.dyn".  It does
  44 # this so that it can easily sort all dynamic relocations before the
  45 # output section has been populated.
  46 OTHER_GOT_RELOC_SECTIONS="
  47   .rel.dyn      ${RELOCATING-0} : { *(.rel.dyn) }
  48 "
  49 # GOT-related settings.
  50 # If the output has a GOT section, there must be exactly 0x7ff0 bytes
  51 # between .got and _gp.
  52 OTHER_GOT_SYMBOLS='HIDDEN (_gp = ALIGN (16) + 0x7ff0);'
  53
  54 # .got.plt is only used for the PLT psABI extension.  It should not be
  55 # included in the .sdata block with .got, as there is no need to access
  56 # the section from _gp.  Note that the traditional:
  57 #
  58 #      . = .
  59 #      _gp = ALIGN (16) + 0x7ff0;
  60 #      .got : { *(.got.plt) *(.got) }
  61 #
  62 # would set _gp to the wrong value; _gp - 0x7ff0 must point to the start
  63 # of *(.got).
  64 GOT=".got          ${RELOCATING-0} : { *(.got) }"
  65 unset OTHER_READWRITE_SECTIONS
  66 unset OTHER_RELRO_SECTIONS
  67 if test -n "$RELRO_NOW"; then
  68   OTHER_RELRO_SECTIONS=".got.plt      ${RELOCATING-0} : { *(.got.plt) }"
  69 else
  70   OTHER_READWRITE_SECTIONS=".got.plt      ${RELOCATING-0} : { *(.got.plt) }"
  71 fi
  72
  73 OTHER_SDATA_SECTIONS="
  74   .lit8         ${RELOCATING-0} : { *(.lit8) }
  75   .lit4         ${RELOCATING-0} : { *(.lit4) }
  76   .srdata       ${RELOCATING-0} : { *(.srdata) }
  77 "
  78
  79 # Magic symbols.
  80 TEXT_START_SYMBOLS="${CREATE_SHLIB+PROVIDE (}_ftext = .${CREATE_SHLIB+)};"
  81 DATA_START_SYMBOLS="${CREATE_SHLIB+PROVIDE (}_fdata = .${CREATE_SHLIB+)};"
  82 OTHER_BSS_SYMBOLS="${CREATE_SHLIB+PROVIDE (}_fbss = .${CREATE_SHLIB+)};"
  83
  84 INITIAL_READONLY_SECTIONS=
  85 if test -z "${CREATE_SHLIB}"; then
  86   INITIAL_READONLY_SECTIONS=".interp       ${RELOCATING-0} : { *(.interp) }"
  87 fi
  88 INITIAL_READONLY_SECTIONS="${INITIAL_READONLY_SECTIONS}
  89   .MIPS.abiflags      ${RELOCATING-0} : { *(.MIPS.abiflags) }
  90   .MIPS.xhash      ${RELOCATING-0} : { *(.MIPS.xhash) }
  91   .reginfo      ${RELOCATING-0} : { *(.reginfo) }"
  92 # Discard any .MIPS.content* or .MIPS.events* sections.  The linker
  93 # doesn't know how to adjust them.
  94 OTHER_SECTIONS="/DISCARD/ : { *(.MIPS.content*) *(.MIPS.events*) }"
  95
  96 TEXT_DYNAMIC=