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=elf32
  14 EXTRA_EM_FILE=mipself
  15
  16 case x"$EMULATION_NAME" in
  17 xelf32*n32*) ELFSIZE=32 ;;
  18 xelf64*) ELFSIZE=64 ;;
  19 x) ;;
  20 *) echo $0: unhandled emulation $EMULATION_NAME >&2; exit 1 ;;
  21 esac
  22
  23 if test `echo "$host" | sed -e s/64//` = `echo "$target" | sed -e s/64//`; then
  24   case " $EMULATION_LIBPATH " in
  25     *" ${EMULATION_NAME} "*)
  26       NATIVE=yes
  27       ;;
  28   esac
  29 fi
  30
  31 # Look for 64 bit target libraries in /lib64, /usr/lib64 etc., first.
  32 LIBPATH_SUFFIX=$ELFSIZE
  33
  34 GENERATE_SHLIB_SCRIPT=yes
  35 GENERATE_PIE_SCRIPT=yes
  36
  37 TEXT_START_ADDR=0x10000000
  38 MAXPAGESIZE="CONSTANT (MAXPAGESIZE)"
  39 ENTRY=__start
  40
  41 # Unlike most targets, the MIPS backend puts all dynamic relocations
  42 # in a single dynobj section, which it also calls ".rel.dyn".  It does
  43 # this so that it can easily sort all dynamic relocations before the
  44 # output section has been populated.
  45 OTHER_GOT_RELOC_SECTIONS="
  46   .rel.dyn      ${RELOCATING-0} : { *(.rel.dyn) }
  47 "
  48 # GOT-related settings.
  49 # If the output has a GOT section, there must be exactly 0x7ff0 bytes
  50 # between .got and _gp.  The ". = ." below stops the orphan code from
  51 # inserting other sections between the assignment to _gp and the start
  52 # of .got.
  53 OTHER_GOT_SYMBOLS='
  54   . = .;
  55   HIDDEN (_gp = ALIGN (16) + 0x7ff0);
  56 '
  57 # .got.plt is only used for the PLT psABI extension.  It should not be
  58 # included in the .sdata block with .got, as there is no need to access
  59 # the section from _gp.  Note that the traditional:
  60 #
  61 #      . = .
  62 #      _gp = ALIGN (16) + 0x7ff0;
  63 #      .got : { *(.got.plt) *(.got) }
  64 #
  65 # would set _gp to the wrong value; _gp - 0x7ff0 must point to the start
  66 # of *(.got).
  67 GOT=".got          ${RELOCATING-0} : { *(.got) }"
  68 unset OTHER_READWRITE_SECTIONS
  69 unset OTHER_RELRO_SECTIONS
  70 if test -n "$RELRO_NOW"; then
  71   OTHER_RELRO_SECTIONS=".got.plt      ${RELOCATING-0} : { *(.got.plt) }"
  72 else
  73   OTHER_READWRITE_SECTIONS=".got.plt      ${RELOCATING-0} : { *(.got.plt) }"
  74 fi
  75
  76 OTHER_SDATA_SECTIONS="
  77   .lit8         ${RELOCATING-0} : { *(.lit8) }
  78   .lit4         ${RELOCATING-0} : { *(.lit4) }
  79   .srdata       ${RELOCATING-0} : { *(.srdata) }
  80 "
  81
  82 # Magic symbols.
  83 TEXT_START_SYMBOLS='_ftext = . ;'
  84 DATA_START_SYMBOLS='_fdata = . ;'
  85 OTHER_BSS_SYMBOLS='_fbss = .;'
  86
  87 INITIAL_READONLY_SECTIONS=
  88 if test -z "${CREATE_SHLIB}"; then
  89   INITIAL_READONLY_SECTIONS=".interp       ${RELOCATING-0} : { *(.interp) }"
  90 fi
  91 INITIAL_READONLY_SECTIONS="${INITIAL_READONLY_SECTIONS}
  92   .MIPS.abiflags      ${RELOCATING-0} : { *(.MIPS.abiflags) }
  93   .reginfo      ${RELOCATING-0} : { *(.reginfo) }"
  94 # Discard any .MIPS.content* or .MIPS.events* sections.  The linker
  95 # doesn't know how to adjust them.
  96 OTHER_SECTIONS="/DISCARD/ : { *(.MIPS.content*) *(.MIPS.events*) }"
  97
  98 TEXT_DYNAMIC=