ld/scripttempl/avr.sc

   1 # Copyright (C) 2014-2022 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 # RODATA_PM_OFFSET
   8 #         If empty, .rodata sections will be part of .data.  This is for
   9 #         devices where it is not possible to use LD* instructions to read
  10 #         from flash.
  11 #
  12 #         If non-empty, .rodata is not part of .data and the .rodata
  13 #         objects are assigned addresses at an offest of RODATA_PM_OFFSET.
  14 #         This is for devices that feature reading from flash by means of
  15 #         LD* instructions, provided the addresses are offset by
  16 #         __RODATA_PM_OFFSET__ (which defaults to RODATA_PM_OFFSET).
  17
  18 cat <<EOF
  19 /* Copyright (C) 2014-2022 Free Software Foundation, Inc.
  20
  21    Copying and distribution of this script, with or without modification,
  22    are permitted in any medium without royalty provided the copyright
  23    notice and this notice are preserved.  */
  24
  25 OUTPUT_FORMAT("${OUTPUT_FORMAT}","${OUTPUT_FORMAT}","${OUTPUT_FORMAT}")
  26 OUTPUT_ARCH(${ARCH})
  27 EOF
  28
  29 test -n "${RELOCATING}" && cat <<EOF
  30 __TEXT_REGION_LENGTH__ = DEFINED(__TEXT_REGION_LENGTH__) ? __TEXT_REGION_LENGTH__ : $TEXT_LENGTH;
  31 __DATA_REGION_LENGTH__ = DEFINED(__DATA_REGION_LENGTH__) ? __DATA_REGION_LENGTH__ : $DATA_LENGTH;
  32 ${EEPROM_LENGTH+__EEPROM_REGION_LENGTH__ = DEFINED(__EEPROM_REGION_LENGTH__) ? __EEPROM_REGION_LENGTH__ : $EEPROM_LENGTH;}
  33 __FUSE_REGION_LENGTH__ = DEFINED(__FUSE_REGION_LENGTH__) ? __FUSE_REGION_LENGTH__ : $FUSE_LENGTH;
  34 __LOCK_REGION_LENGTH__ = DEFINED(__LOCK_REGION_LENGTH__) ? __LOCK_REGION_LENGTH__ : $LOCK_LENGTH;
  35 __SIGNATURE_REGION_LENGTH__ = DEFINED(__SIGNATURE_REGION_LENGTH__) ? __SIGNATURE_REGION_LENGTH__ : $SIGNATURE_LENGTH;
  36 ${USER_SIGNATURE_LENGTH+__USER_SIGNATURE_REGION_LENGTH__ = DEFINED(__USER_SIGNATURE_REGION_LENGTH__) ? __USER_SIGNATURE_REGION_LENGTH__ : $USER_SIGNATURE_LENGTH;}
  37 ${RODATA_PM_OFFSET+__RODATA_PM_OFFSET__ = DEFINED(__RODATA_PM_OFFSET__) ? __RODATA_PM_OFFSET__ : $RODATA_PM_OFFSET;}
  38 MEMORY
  39 {
  40   text   (rx)   : ORIGIN = 0, LENGTH = __TEXT_REGION_LENGTH__
  41   data   (rw!x) : ORIGIN = $DATA_ORIGIN, LENGTH = __DATA_REGION_LENGTH__
  42 ${EEPROM_LENGTH+  eeprom (rw!x) : ORIGIN = 0x810000, LENGTH = __EEPROM_REGION_LENGTH__}
  43   $FUSE_NAME      (rw!x) : ORIGIN = 0x820000, LENGTH = __FUSE_REGION_LENGTH__
  44   lock      (rw!x) : ORIGIN = 0x830000, LENGTH = __LOCK_REGION_LENGTH__
  45   signature (rw!x) : ORIGIN = 0x840000, LENGTH = __SIGNATURE_REGION_LENGTH__
  46 ${USER_SIGNATURE_LENGTH+  user_signatures (rw!x) : ORIGIN = 0x850000, LENGTH = __USER_SIGNATURE_REGION_LENGTH__}
  47 }
  48 EOF
  49
  50 cat <<EOF
  51 SECTIONS
  52 {
  53   /* Read-only sections, merged into text segment: */
  54   ${TEXT_DYNAMIC+${DYNAMIC}}
  55   .hash        ${RELOCATING-0} : { *(.hash)             }
  56   .dynsym      ${RELOCATING-0} : { *(.dynsym)           }
  57   .dynstr      ${RELOCATING-0} : { *(.dynstr)           }
  58   .gnu.version ${RELOCATING-0} : { *(.gnu.version)      }
  59   .gnu.version_d ${RELOCATING-0} : { *(.gnu.version_d)  }
  60   .gnu.version_r ${RELOCATING-0} : { *(.gnu.version_r)  }
  61
  62   .rel.init    ${RELOCATING-0} : { *(.rel.init)         }
  63   .rela.init   ${RELOCATING-0} : { *(.rela.init)        }
  64   .rel.text    ${RELOCATING-0} :
  65     {
  66       *(.rel.text)
  67       ${RELOCATING+*(.rel.text.*)}
  68       ${RELOCATING+*(.rel.gnu.linkonce.t*)}
  69     }
  70   .rela.text   ${RELOCATING-0} :
  71     {
  72       *(.rela.text)
  73       ${RELOCATING+*(.rela.text.*)}
  74       ${RELOCATING+*(.rela.gnu.linkonce.t*)}
  75     }
  76   .rel.fini    ${RELOCATING-0} : { *(.rel.fini)         }
  77   .rela.fini   ${RELOCATING-0} : { *(.rela.fini)        }
  78   .rel.rodata  ${RELOCATING-0} :
  79     {
  80       *(.rel.rodata)
  81       ${RELOCATING+*(.rel.rodata.*)}
  82       ${RELOCATING+*(.rel.gnu.linkonce.r*)}
  83     }
  84   .rela.rodata ${RELOCATING-0} :
  85     {
  86       *(.rela.rodata)
  87       ${RELOCATING+*(.rela.rodata.*)}
  88       ${RELOCATING+*(.rela.gnu.linkonce.r*)}
  89     }
  90   .rel.data    ${RELOCATING-0} :
  91     {
  92       *(.rel.data)
  93       ${RELOCATING+*(.rel.data.*)}
  94       ${RELOCATING+*(.rel.gnu.linkonce.d*)}
  95     }
  96   .rela.data   ${RELOCATING-0} :
  97     {
  98       *(.rela.data)
  99       ${RELOCATING+*(.rela.data.*)}
 100       ${RELOCATING+*(.rela.gnu.linkonce.d*)}
 101     }
 102   .rel.ctors   ${RELOCATING-0} : { *(.rel.ctors)        }
 103   .rela.ctors  ${RELOCATING-0} : { *(.rela.ctors)       }
 104   .rel.dtors   ${RELOCATING-0} : { *(.rel.dtors)        }
 105   .rela.dtors  ${RELOCATING-0} : { *(.rela.dtors)       }
 106   .rel.got     ${RELOCATING-0} : { *(.rel.got)          }
 107   .rela.got    ${RELOCATING-0} : { *(.rela.got)         }
 108   .rel.bss     ${RELOCATING-0} : { *(.rel.bss)          }
 109   .rela.bss    ${RELOCATING-0} : { *(.rela.bss)         }
 110   .rel.plt     ${RELOCATING-0} : { *(.rel.plt)          }
 111   .rela.plt    ${RELOCATING-0} : { *(.rela.plt)         }
 112
 113   /* Internal text space or external memory.  */
 114   .text ${RELOCATING-0} :
 115   {
 116     ${RELOCATING+*(.vectors)
 117     KEEP(*(.vectors))
 118
 119     /* For data that needs to reside in the lower 64k of progmem.  */
 120     *(.progmem.gcc*)
 121
 122     /* PR 13812: Placing the trampolines here gives a better chance
 123        that they will be in range of the code that uses them.  */
 124     . = ALIGN(2);
 125     __trampolines_start = . ;
 126     /* The jump trampolines for the 16-bit limited relocs will reside here.  */
 127     *(.trampolines)
 128     *(.trampolines*)
 129     __trampolines_end = . ;
 130
 131     /* avr-libc expects these data to reside in lower 64K. */
 132     *libprintf_flt.a:*(.progmem.data)
 133     *libc.a:*(.progmem.data)
 134
 135     *(.progmem.*)
 136
 137     . = ALIGN(2);
 138
 139     /* For code that needs to reside in the lower 128k progmem.  */
 140     *(.lowtext)
 141     *(.lowtext*)}
 142
 143     ${CONSTRUCTING+ __ctors_start = . ; }
 144     ${CONSTRUCTING+ *(.ctors) }
 145     ${CONSTRUCTING+ __ctors_end = . ; }
 146     ${CONSTRUCTING+ __dtors_start = . ; }
 147     ${CONSTRUCTING+ *(.dtors) }
 148     ${CONSTRUCTING+ __dtors_end = . ; }
 149     ${RELOCATING+KEEP(SORT(*)(.ctors))
 150     KEEP(SORT(*)(.dtors))
 151
 152     /* From this point on, we do not bother about whether the insns are
 153        below or above the 16 bits boundary.  */
 154     *(.init0)  /* Start here after reset.  */
 155     KEEP (*(.init0))
 156     *(.init1)
 157     KEEP (*(.init1))
 158     *(.init2)  /* Clear __zero_reg__, set up stack pointer.  */
 159     KEEP (*(.init2))
 160     *(.init3)
 161     KEEP (*(.init3))
 162     *(.init4)  /* Initialize data and BSS.  */
 163     KEEP (*(.init4))
 164     *(.init5)
 165     KEEP (*(.init5))
 166     *(.init6)  /* C++ constructors.  */
 167     KEEP (*(.init6))
 168     *(.init7)
 169     KEEP (*(.init7))
 170     *(.init8)
 171     KEEP (*(.init8))
 172     *(.init9)  /* Call main().  */
 173     KEEP (*(.init9))}
 174     *(.text)
 175     ${RELOCATING+. = ALIGN(2);
 176     *(.text.*)
 177     . = ALIGN(2);
 178     *(.fini9)  /* _exit() starts here.  */
 179     KEEP (*(.fini9))
 180     *(.fini8)
 181     KEEP (*(.fini8))
 182     *(.fini7)
 183     KEEP (*(.fini7))
 184     *(.fini6)  /* C++ destructors.  */
 185     KEEP (*(.fini6))
 186     *(.fini5)
 187     KEEP (*(.fini5))
 188     *(.fini4)
 189     KEEP (*(.fini4))
 190     *(.fini3)
 191     KEEP (*(.fini3))
 192     *(.fini2)
 193     KEEP (*(.fini2))
 194     *(.fini1)
 195     KEEP (*(.fini1))
 196     *(.fini0)  /* Infinite loop after program termination.  */
 197     KEEP (*(.fini0))
 198
 199     /* For code that needs not to reside in the lower progmem.  */
 200     *(.hightext)
 201     *(.hightext*)
 202
 203     *(.progmemx.*)
 204
 205     . = ALIGN(2);
 206
 207     /* For tablejump instruction arrays.  We do not relax
 208        JMP / CALL instructions within these sections.  */
 209     *(.jumptables)
 210     *(.jumptables*)
 211
 212     _etext = . ;}
 213   } ${RELOCATING+ > text}
 214 EOF
 215
 216 # Devices like ATtiny816 allow to read from flash memory by means of LD*
 217 # instructions provided we add an offset of __RODATA_PM_OFFSET__ to the
 218 # flash addresses.
 219
 220 if test -n "$RODATA_PM_OFFSET"; then
 221     cat <<EOF
 222   .rodata ${RELOCATING+ ADDR(.text) + SIZEOF (.text) + __RODATA_PM_OFFSET__ } ${RELOCATING-0} :
 223   {
 224     *(.rodata)
 225     ${RELOCATING+ *(.rodata*)
 226     *(.gnu.linkonce.r*)}
 227   } ${RELOCATING+AT> text}
 228 EOF
 229 fi
 230
 231 cat <<EOF
 232   .data        ${RELOCATING-0} :
 233   {
 234     ${RELOCATING+ PROVIDE (__data_start = .) ; }
 235     *(.data)
 236     ${RELOCATING+ *(.data*)
 237     *(.gnu.linkonce.d*)}
 238 EOF
 239
 240 # Classical devices that don't show flash memory in the SRAM address space
 241 # need .rodata to be part of .data because the compiler will use LD*
 242 # instructions and LD* cannot access flash.
 243
 244 if test -z "$RODATA_PM_OFFSET" && test -n "${RELOCATING}"; then
 245     cat <<EOF
 246     *(.rodata)  /* We need to include .rodata here if gcc is used */
 247     *(.rodata*) /* with -fdata-sections.  */
 248     *(.gnu.linkonce.r*)
 249 EOF
 250 fi
 251
 252 cat <<EOF
 253     ${RELOCATING+. = ALIGN(2);}
 254     ${RELOCATING+ _edata = . ; }
 255     ${RELOCATING+ PROVIDE (__data_end = .) ; }
 256   } ${RELOCATING+ > data ${RELOCATING+AT> text}}
 257
 258   .bss ${RELOCATING+ ADDR(.data) + SIZEOF (.data)} ${RELOCATING-0} :${RELOCATING+ AT (ADDR (.bss))}
 259   {
 260     ${RELOCATING+ PROVIDE (__bss_start = .) ; }
 261     *(.bss)
 262     ${RELOCATING+ *(.bss*)}
 263     ${RELOCATING+ *(COMMON)}
 264     ${RELOCATING+ PROVIDE (__bss_end = .) ; }
 265   } ${RELOCATING+ > data}
 266
 267   ${RELOCATING+ __data_load_start = LOADADDR(.data); }
 268   ${RELOCATING+ __data_load_end = __data_load_start + SIZEOF(.data); }
 269
 270   /* Global data not cleared after reset.  */
 271   .noinit ${RELOCATING+ ADDR(.bss) + SIZEOF (.bss)} ${RELOCATING-0}: ${RELOCATING+ AT (ADDR (.noinit))}
 272   {
 273     ${RELOCATING+ PROVIDE (__noinit_start = .) ; }
 274     *(.noinit${RELOCATING+ .noinit.* .gnu.linkonce.n.*})
 275     ${RELOCATING+ PROVIDE (__noinit_end = .) ; }
 276     ${RELOCATING+ _end = . ;  }
 277     ${RELOCATING+ PROVIDE (__heap_start = .) ; }
 278   } ${RELOCATING+ > data}
 279 EOF
 280
 281 if test -n "${EEPROM_LENGTH}"; then
 282 cat <<EOF
 283
 284   .eeprom ${RELOCATING-0}:
 285   {
 286     /* See .data above...  */
 287     KEEP(*(.eeprom*))
 288     ${RELOCATING+ __eeprom_end = . ; }
 289   } ${RELOCATING+ > eeprom}
 290 EOF
 291 fi
 292
 293 if test "$FUSE_NAME" = "fuse" ; then
 294 cat <<EOF
 295
 296   .fuse ${RELOCATING-0}:
 297   {
 298     KEEP(*(.fuse))
 299     ${RELOCATING+KEEP(*(.lfuse))
 300     KEEP(*(.hfuse))
 301     KEEP(*(.efuse))}
 302   } ${RELOCATING+ > fuse}
 303 EOF
 304 fi
 305
 306 cat <<EOF
 307
 308   .lock ${RELOCATING-0}:
 309   {
 310     KEEP(*(.lock*))
 311   } ${RELOCATING+ > lock}
 312
 313   .signature ${RELOCATING-0}:
 314   {
 315     KEEP(*(.signature*))
 316   } ${RELOCATING+ > signature}
 317 EOF
 318
 319 if test "$FUSE_NAME" = "config" ; then
 320 cat <<EOF
 321
 322   .config ${RELOCATING-0}:
 323   {
 324     KEEP(*(.config*))
 325   } ${RELOCATING+ > config}
 326 EOF
 327 fi
 328
 329 cat <<EOF
 330
 331   /* Stabs debugging sections.  */
 332   .stab 0 : { *(.stab) }
 333   .stabstr 0 : { *(.stabstr) }
 334   .stab.excl 0 : { *(.stab.excl) }
 335   .stab.exclstr 0 : { *(.stab.exclstr) }
 336   .stab.index 0 : { *(.stab.index) }
 337   .stab.indexstr 0 : { *(.stab.indexstr) }
 338   .comment 0 : { *(.comment) }
 339   .note.gnu.build-id ${RELOCATING-0} : { *(.note.gnu.build-id) }
 340 EOF
 341
 342 . $srcdir/scripttempl/DWARF.sc
 343
 344 cat <<EOF
 345 }
 346 EOF