ld/scripttempl/xstormy16.sc

   1 # Copyright (C) 2014 Free Software Foundation, Inc.
   2 #
   3 # Copying and distribution of this file, with or without modification,
   4 # are permitted in any medium without royalty provided the copyright
   5 # notice and this notice are preserved.
   6 #
   7 # Unusual variables checked by this code:
   8 #       NOP - two byte opcode for no-op (defaults to 0)
   9 #       INITIAL_READONLY_SECTIONS - at start of text segment
  10 #       OTHER_READONLY_SECTIONS - other than .text .init .rodata ...
  11 #               (e.g., .PARISC.milli)
  12 #       OTHER_TEXT_SECTIONS - these get put in .text when relocating
  13 #       OTHER_READWRITE_SECTIONS - other than .data .bss .ctors .sdata ...
  14 #               (e.g., .PARISC.global)
  15 #       OTHER_SECTIONS - at the end
  16 #       EXECUTABLE_SYMBOLS - symbols that must be defined for an
  17 #               executable (e.g., _DYNAMIC_LINK)
  18 #       TEXT_START_SYMBOLS - symbols that appear at the start of the
  19 #               .text section.
  20 #       DATA_START_SYMBOLS - symbols that appear at the start of the
  21 #               .data section.
  22 #       OTHER_GOT_SYMBOLS - symbols defined just before .got.
  23 #       OTHER_GOT_SECTIONS - sections just after .got and .sdata.
  24 #       OTHER_BSS_SYMBOLS - symbols that appear at the start of the
  25 #               .bss section besides __bss_start.
  26 #       INPUT_FILES - INPUT command of files to always include
  27 #       INIT_START, INIT_END -  statements just before and just after
  28 #       combination of .init sections.
  29 #       FINI_START, FINI_END - statements just before and just after
  30 #       combination of .fini sections.
  31 #
  32 # When adding sections, do note that the names of some sections are used
  33 # when specifying the start address of the next.
  34 #
  35
  36 #  Many sections come in three flavours.  There is the 'real' section,
  37 #  like ".data".  Then there are the per-procedure or per-variable
  38 #  sections, generated by -ffunction-sections and -fdata-sections in GCC,
  39 #  and useful for --gc-sections, which for a variable "foo" might be
  40 #  ".data.foo".  Then there are the linkonce sections, for which the linker
  41 #  eliminates duplicates, which are named like ".gnu.linkonce.d.foo".
  42 #  The exact correspondences are:
  43 #
  44 #  Section      Linkonce section
  45 #  .text        .gnu.linkonce.t.foo
  46 #  .rodata      .gnu.linkonce.r.foo
  47 #  .data        .gnu.linkonce.d.foo
  48 #  .bss         .gnu.linkonce.b.foo
  49 #  .sdata       .gnu.linkonce.s.foo
  50 #  .sbss        .gnu.linkonce.sb.foo
  51 #  .sdata2      .gnu.linkonce.s2.foo
  52 #  .sbss2       .gnu.linkonce.sb2.foo
  53 #
  54 #  Each of these can also have corresponding .rel.* and .rela.* sections.
  55
  56 test -z "$ENTRY" && ENTRY=_start
  57 test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
  58 test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
  59 if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi
  60 test -z "${ELFSIZE}" && ELFSIZE=32
  61 test -z "${ALIGNMENT}" && ALIGNMENT="${ELFSIZE} / 8"
  62 CTOR=".ctors ${CONSTRUCTING-0} :
  63   {
  64     ${CONSTRUCTING+${CTOR_START}}
  65     /* gcc uses crtbegin.o to find the start of
  66        the constructors, so we make sure it is
  67        first.  Because this is a wildcard, it
  68        doesn't matter if the user does not
  69        actually link against crtbegin.o; the
  70        linker won't look for a file to match a
  71        wildcard.  The wildcard also means that it
  72        doesn't matter which directory crtbegin.o
  73        is in.  */
  74
  75     KEEP (*crtbegin.o(.ctors))
  76     KEEP (*crtbegin?.o(.ctors))
  77
  78     /* We don't want to include the .ctor section from
  79        the crtend.o file until after the sorted ctors.
  80        The .ctor section from the crtend file contains the
  81        end of ctors marker and it must be last */
  82
  83     KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .ctors))
  84     KEEP (*(SORT(.ctors.*)))
  85     KEEP (*(.ctors))
  86     ${CONSTRUCTING+${CTOR_END}}
  87   } > ROM"
  88
  89 DTOR=" .dtors       ${CONSTRUCTING-0} :
  90   {
  91     ${CONSTRUCTING+${DTOR_START}}
  92     KEEP (*crtbegin.o(.dtors))
  93     KEEP (*crtbegin?.o(.dtors))
  94     KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .dtors))
  95     KEEP (*(SORT(.dtors.*)))
  96     KEEP (*(.dtors))
  97     ${CONSTRUCTING+${DTOR_END}}
  98   } > ROM"
  99
 100 cat <<EOF
 101 /* Copyright (C) 2014 Free Software Foundation, Inc.
 102
 103    Copying and distribution of this script, with or without modification,
 104    are permitted in any medium without royalty provided the copyright
 105    notice and this notice are preserved.  */
 106
 107 OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
 108               "${LITTLE_OUTPUT_FORMAT}")
 109 OUTPUT_ARCH(${OUTPUT_ARCH})
 110 ${RELOCATING+ENTRY(${ENTRY})}
 111
 112 ${RELOCATING+${LIB_SEARCH_DIRS}}
 113 ${RELOCATING+${EXECUTABLE_SYMBOLS}}
 114 ${RELOCATING+${INPUT_FILES}}
 115 ${RELOCATING- /* For some reason, the Solaris linker makes bad executables
 116   if gld -r is used and the intermediate file has sections starting
 117   at non-zero addresses.  Could be a Solaris ld bug, could be a GNU ld
 118   bug.  But for now assigning the zero vmas works.  */}
 119
 120 /* There are two memory regions we care about, one from 0 through 0x7F00
 121    that is RAM and one from 0x8000 up which is ROM.  */
 122 MEMORY
 123 {
 124   RAM (w) : ORIGIN = 0, LENGTH = 0x7F00
 125   ROM (!w) : ORIGIN = 0x8000, LENGTH = 0xFF8000
 126 }
 127
 128 SECTIONS
 129 {
 130   .data  ${RELOCATING-0} :
 131   {
 132     ${RELOCATING+__rdata = .;}
 133     ${RELOCATING+__data = .;}
 134     ${RELOCATING+${DATA_START_SYMBOLS}}
 135     *(.data)
 136     ${RELOCATING+*(.data.*)}
 137     ${RELOCATING+*(.gnu.linkonce.d.*)}
 138     ${CONSTRUCTING+SORT(CONSTRUCTORS)}
 139   } > RAM
 140   ${RELOCATING+${OTHER_READWRITE_SECTIONS}}
 141   ${RELOCATING+${OTHER_GOT_SYMBOLS}}
 142   ${RELOCATING+${OTHER_GOT_SECTIONS}}
 143   ${RELOCATING+_edata = .;}
 144   ${RELOCATING+PROVIDE (edata = .);}
 145   ${RELOCATING+__bss_start = .;}
 146   ${RELOCATING+${OTHER_BSS_SYMBOLS}}
 147   .bss     ${RELOCATING-0} :
 148   {
 149    *(.dynbss)
 150    *(.bss)
 151    ${RELOCATING+*(.bss.*)}
 152    ${RELOCATING+*(.gnu.linkonce.b.*)}
 153    *(COMMON)
 154    /* Align here to ensure that the .bss section occupies space up to
 155       _end.  Align after .bss to ensure correct alignment even if the
 156       .bss section disappears because there are no input sections.  */
 157    ${RELOCATING+. = ALIGN(${ALIGNMENT});}
 158   } > RAM
 159   ${RELOCATING+${OTHER_BSS_END_SYMBOLS}}
 160   ${RELOCATING+. = ALIGN(${ALIGNMENT});}
 161   ${RELOCATING+${OTHER_END_SYMBOLS}}
 162   ${RELOCATING+_end = .;}
 163   ${RELOCATING+__stack = .;}
 164   ${RELOCATING+PROVIDE (end = .);}
 165
 166   /* Read-only sections in ROM.  */
 167   .int_vec     ${RELOCATING-0} : { *(.int_vec)  } ${RELOCATING+> ROM}
 168
 169   .rodata ${RELOCATING-0} : { *(.rodata) ${RELOCATING+*(.rodata.*)} ${RELOCATING+*(.gnu.linkonce.r.*)} } ${RELOCATING+> ROM}
 170   ${RELOCATING+${CTOR}}
 171   ${RELOCATING+${DTOR}}
 172   .jcr : { KEEP (*(.jcr)) } ${RELOCATING+> ROM}
 173   .eh_frame : { KEEP (*(.eh_frame)) } ${RELOCATING+> ROM}
 174   .gcc_except_table : { *(.gcc_except_table) *(.gcc_except_table.*) } ${RELOCATING+> ROM}
 175   .plt : { *(.plt) } ${RELOCATING+> ROM}
 176
 177   .text    ${RELOCATING-0} :
 178   {
 179     ${RELOCATING+${TEXT_START_SYMBOLS}}
 180     *(.text)
 181     ${RELOCATING+*(.text.*)}
 182     *(.stub)
 183     /* .gnu.warning sections are handled specially by elf32.em.  */
 184     *(.gnu.warning)
 185     ${RELOCATING+*(.gnu.linkonce.t.*)}
 186     ${RELOCATING+${OTHER_TEXT_SECTIONS}}
 187   } ${RELOCATING+> ROM =${NOP-0}}
 188   .init        ${RELOCATING-0} :
 189   {
 190     ${RELOCATING+${INIT_START}}
 191     KEEP (*(.init))
 192     ${RELOCATING+${INIT_END}}
 193   } ${RELOCATING+> ROM =${NOP-0}}
 194   .fini    ${RELOCATING-0} :
 195   {
 196     ${RELOCATING+${FINI_START}}
 197     KEEP (*(.fini))
 198     ${RELOCATING+${FINI_END}}
 199   } ${RELOCATING+> ROM =${NOP-0}}
 200   ${RELOCATING+PROVIDE (__etext = .);}
 201   ${RELOCATING+PROVIDE (_etext = .);}
 202   ${RELOCATING+PROVIDE (etext = .);}
 203   ${RELOCATING+${OTHER_READONLY_SECTIONS}}
 204
 205
 206   /* Stabs debugging sections.  */
 207   .stab 0 : { *(.stab) }
 208   .stabstr 0 : { *(.stabstr) }
 209   .stab.excl 0 : { *(.stab.excl) }
 210   .stab.exclstr 0 : { *(.stab.exclstr) }
 211   .stab.index 0 : { *(.stab.index) }
 212   .stab.indexstr 0 : { *(.stab.indexstr) }
 213
 214   .comment 0 : { *(.comment) }
 215
 216 EOF
 217
 218 . $srcdir/scripttempl/DWARF.sc
 219
 220 cat <<EOF
 221   ${RELOCATING+${OTHER_RELOCATING_SECTIONS}}
 222
 223   /* These must appear regardless of ${RELOCATING}.  */
 224   ${OTHER_SECTIONS}
 225 }
 226 EOF