ld/scripttempl/avr.sc

   1 # Copyright (C) 2014-2023 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) 2014-2023 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_ORIGIN__ = DEFINED(__DATA_REGION_ORIGIN__) ? __DATA_REGION_ORIGIN__ : $DATA_ORIGIN;
  32 __DATA_REGION_LENGTH__ = DEFINED(__DATA_REGION_LENGTH__) ? __DATA_REGION_LENGTH__ : $DATA_LENGTH;
  33
  34 ${EEPROM_LENGTH+__EEPROM_REGION_LENGTH__ = DEFINED(__EEPROM_REGION_LENGTH__) ? __EEPROM_REGION_LENGTH__ : $EEPROM_LENGTH;}
  35 __FUSE_REGION_LENGTH__ = DEFINED(__FUSE_REGION_LENGTH__) ? __FUSE_REGION_LENGTH__ : $FUSE_LENGTH;
  36 __LOCK_REGION_LENGTH__ = DEFINED(__LOCK_REGION_LENGTH__) ? __LOCK_REGION_LENGTH__ : $LOCK_LENGTH;
  37 __SIGNATURE_REGION_LENGTH__ = DEFINED(__SIGNATURE_REGION_LENGTH__) ? __SIGNATURE_REGION_LENGTH__ : $SIGNATURE_LENGTH;
  38 ${USER_SIGNATURE_LENGTH+__USER_SIGNATURE_REGION_LENGTH__ = DEFINED(__USER_SIGNATURE_REGION_LENGTH__) ? __USER_SIGNATURE_REGION_LENGTH__ : $USER_SIGNATURE_LENGTH;}
  39 ${RODATA_PM_OFFSET+__RODATA_PM_OFFSET__ = DEFINED(__RODATA_PM_OFFSET__) ? __RODATA_PM_OFFSET__ : $RODATA_PM_OFFSET;}
  40 MEMORY
  41 {
  42   text   (rx)   : ORIGIN = 0, LENGTH = __TEXT_REGION_LENGTH__
  43   data   (rw!x) : ORIGIN = __DATA_REGION_ORIGIN__, LENGTH = __DATA_REGION_LENGTH__
  44 ${EEPROM_LENGTH+  eeprom (rw!x) : ORIGIN = 0x810000, LENGTH = __EEPROM_REGION_LENGTH__}
  45   $FUSE_NAME      (rw!x) : ORIGIN = 0x820000, LENGTH = __FUSE_REGION_LENGTH__
  46   lock      (rw!x) : ORIGIN = 0x830000, LENGTH = __LOCK_REGION_LENGTH__
  47   signature (rw!x) : ORIGIN = 0x840000, LENGTH = __SIGNATURE_REGION_LENGTH__
  48 ${USER_SIGNATURE_LENGTH+  user_signatures (rw!x) : ORIGIN = 0x850000, LENGTH = __USER_SIGNATURE_REGION_LENGTH__}
  49 }
  50 EOF
  51
  52 cat <<EOF
  53 SECTIONS
  54 {
  55   /* Read-only sections, merged into text segment: */
  56   ${TEXT_DYNAMIC+${DYNAMIC}}
  57   .hash        ${RELOCATING-0} : { *(.hash)             }
  58   .dynsym      ${RELOCATING-0} : { *(.dynsym)           }
  59   .dynstr      ${RELOCATING-0} : { *(.dynstr)           }
  60   .gnu.version ${RELOCATING-0} : { *(.gnu.version)      }
  61   .gnu.version_d ${RELOCATING-0} : { *(.gnu.version_d)  }
  62   .gnu.version_r ${RELOCATING-0} : { *(.gnu.version_r)  }
  63
  64   .rel.init    ${RELOCATING-0} : { *(.rel.init)         }
  65   .rela.init   ${RELOCATING-0} : { *(.rela.init)        }
  66   .rel.text    ${RELOCATING-0} :
  67     {
  68       *(.rel.text)
  69       ${RELOCATING+*(.rel.text.*)}
  70       ${RELOCATING+*(.rel.gnu.linkonce.t*)}
  71     }
  72   .rela.text   ${RELOCATING-0} :
  73     {
  74       *(.rela.text)
  75       ${RELOCATING+*(.rela.text.*)}
  76       ${RELOCATING+*(.rela.gnu.linkonce.t*)}
  77     }
  78   .rel.fini    ${RELOCATING-0} : { *(.rel.fini)         }
  79   .rela.fini   ${RELOCATING-0} : { *(.rela.fini)        }
  80   .rel.rodata  ${RELOCATING-0} :
  81     {
  82       *(.rel.rodata)
  83       ${RELOCATING+*(.rel.rodata.*)}
  84       ${RELOCATING+*(.rel.gnu.linkonce.r*)}
  85     }
  86   .rela.rodata ${RELOCATING-0} :
  87     {
  88       *(.rela.rodata)
  89       ${RELOCATING+*(.rela.rodata.*)}
  90       ${RELOCATING+*(.rela.gnu.linkonce.r*)}
  91     }
  92   .rel.data    ${RELOCATING-0} :
  93     {
  94       *(.rel.data)
  95       ${RELOCATING+*(.rel.data.*)}
  96       ${RELOCATING+*(.rel.gnu.linkonce.d*)}
  97     }
  98   .rela.data   ${RELOCATING-0} :
  99     {
 100       *(.rela.data)
 101       ${RELOCATING+*(.rela.data.*)}
 102       ${RELOCATING+*(.rela.gnu.linkonce.d*)}
 103     }
 104   .rel.ctors   ${RELOCATING-0} : { *(.rel.ctors)        }
 105   .rela.ctors  ${RELOCATING-0} : { *(.rela.ctors)       }
 106   .rel.dtors   ${RELOCATING-0} : { *(.rel.dtors)        }
 107   .rela.dtors  ${RELOCATING-0} : { *(.rela.dtors)       }
 108   .rel.got     ${RELOCATING-0} : { *(.rel.got)          }
 109   .rela.got    ${RELOCATING-0} : { *(.rela.got)         }
 110   .rel.bss     ${RELOCATING-0} : { *(.rel.bss)          }
 111   .rela.bss    ${RELOCATING-0} : { *(.rela.bss)         }
 112   .rel.plt     ${RELOCATING-0} : { *(.rel.plt)          }
 113   .rela.plt    ${RELOCATING-0} : { *(.rela.plt)         }
 114
 115   /* Internal text space or external memory.  */
 116   .text ${RELOCATING-0} :
 117   {
 118     ${RELOCATING+*(.vectors)
 119     KEEP(*(.vectors))
 120
 121     /* For data that needs to reside in the lower 64k of progmem.  */
 122     *(.progmem.gcc*)
 123
 124     /* PR 13812: Placing the trampolines here gives a better chance
 125        that they will be in range of the code that uses them.  */
 126     . = ALIGN(2);
 127     __trampolines_start = . ;
 128     /* The jump trampolines for the 16-bit limited relocs will reside here.  */
 129     *(.trampolines)
 130     *(.trampolines*)
 131     __trampolines_end = . ;
 132
 133     /* avr-libc expects these data to reside in lower 64K. */
 134     *libprintf_flt.a:*(.progmem.data)
 135     *libc.a:*(.progmem.data)
 136
 137     *(.progmem.*)
 138
 139     . = ALIGN(2);
 140
 141     /* For code that needs to reside in the lower 128k progmem.  */
 142     *(.lowtext)
 143     *(.lowtext*)}
 144
 145     ${CONSTRUCTING+ __ctors_start = . ; }
 146     ${CONSTRUCTING+ *(.ctors) }
 147     ${CONSTRUCTING+ __ctors_end = . ; }
 148     ${CONSTRUCTING+ __dtors_start = . ; }
 149     ${CONSTRUCTING+ *(.dtors) }
 150     ${CONSTRUCTING+ __dtors_end = . ; }
 151     ${RELOCATING+KEEP(SORT(*)(.ctors))
 152     KEEP(SORT(*)(.dtors))
 153
 154     /* From this point on, we do not bother about whether the insns are
 155        below or above the 16 bits boundary.  */
 156     *(.init0)  /* Start here after reset.  */
 157     KEEP (*(.init0))
 158     *(.init1)
 159     KEEP (*(.init1))
 160     *(.init2)  /* Clear __zero_reg__, set up stack pointer.  */
 161     KEEP (*(.init2))
 162     *(.init3)
 163     KEEP (*(.init3))
 164     *(.init4)  /* Initialize data and BSS.  */
 165     KEEP (*(.init4))
 166     *(.init5)
 167     KEEP (*(.init5))
 168     *(.init6)  /* C++ constructors.  */
 169     KEEP (*(.init6))
 170     *(.init7)
 171     KEEP (*(.init7))
 172     *(.init8)
 173     KEEP (*(.init8))
 174     *(.init9)  /* Call main().  */
 175     KEEP (*(.init9))}
 176     *(.text)
 177     ${RELOCATING+. = ALIGN(2);
 178     *(.text.*)
 179     . = ALIGN(2);
 180     *(.fini9)  /* _exit() starts here.  */
 181     KEEP (*(.fini9))
 182     *(.fini8)
 183     KEEP (*(.fini8))
 184     *(.fini7)
 185     KEEP (*(.fini7))
 186     *(.fini6)  /* C++ destructors.  */
 187     KEEP (*(.fini6))
 188     *(.fini5)
 189     KEEP (*(.fini5))
 190     *(.fini4)
 191     KEEP (*(.fini4))
 192     *(.fini3)
 193     KEEP (*(.fini3))
 194     *(.fini2)
 195     KEEP (*(.fini2))
 196     *(.fini1)
 197     KEEP (*(.fini1))
 198     *(.fini0)  /* Infinite loop after program termination.  */
 199     KEEP (*(.fini0))
 200
 201     /* For code that needs not to reside in the lower progmem.  */
 202     *(.hightext)
 203     *(.hightext*)
 204
 205     *(.progmemx.*)
 206
 207     . = ALIGN(2);
 208
 209     /* For tablejump instruction arrays.  We do not relax
 210        JMP / CALL instructions within these sections.  */
 211     *(.jumptables)
 212     *(.jumptables*)
 213
 214     _etext = . ;}
 215   } ${RELOCATING+ > text}
 216 EOF
 217
 218 # Devices like ATtiny816 allow to read from flash memory by means of LD*
 219 # instructions provided we add an offset of __RODATA_PM_OFFSET__ to the
 220 # flash addresses.
 221
 222 if test -n "$RODATA_PM_OFFSET"; then
 223     cat <<EOF
 224   .rodata ${RELOCATING+ ADDR(.text) + SIZEOF (.text) + __RODATA_PM_OFFSET__ } ${RELOCATING-0} :
 225   {
 226     *(.rodata)
 227     ${RELOCATING+ *(.rodata*)
 228     *(.gnu.linkonce.r*)}
 229   } ${RELOCATING+AT> text}
 230 EOF
 231 fi
 232
 233 cat <<EOF
 234   .data        ${RELOCATING-0} :
 235   {
 236     ${RELOCATING+ PROVIDE (__data_start = .) ; }
 237     *(.data)
 238     ${RELOCATING+ *(.data*)
 239     *(.gnu.linkonce.d*)}
 240 EOF
 241
 242 # Classical devices that don't show flash memory in the SRAM address space
 243 # need .rodata to be part of .data because the compiler will use LD*
 244 # instructions and LD* cannot access flash.
 245
 246 if test -z "$RODATA_PM_OFFSET" && test -n "${RELOCATING}"; then
 247     cat <<EOF
 248     *(.rodata)  /* We need to include .rodata here if gcc is used */
 249     *(.rodata*) /* with -fdata-sections.  */
 250     *(.gnu.linkonce.r*)
 251 EOF
 252 fi
 253
 254 cat <<EOF
 255     ${RELOCATING+. = ALIGN(2);}
 256     ${RELOCATING+ _edata = . ; }
 257     ${RELOCATING+ PROVIDE (__data_end = .) ; }
 258   } ${RELOCATING+ > data ${RELOCATING+AT> text}}
 259
 260   .bss ${RELOCATING+ ADDR(.data) + SIZEOF (.data)} ${RELOCATING-0} :${RELOCATING+ AT (ADDR (.bss))}
 261   {
 262     ${RELOCATING+ PROVIDE (__bss_start = .) ; }
 263     *(.bss)
 264     ${RELOCATING+ *(.bss*)}
 265     ${RELOCATING+ *(COMMON)}
 266     ${RELOCATING+ PROVIDE (__bss_end = .) ; }
 267   } ${RELOCATING+ > data}
 268
 269   ${RELOCATING+ __data_load_start = LOADADDR(.data); }
 270   ${RELOCATING+ __data_load_end = __data_load_start + SIZEOF(.data); }
 271
 272   /* Global data not cleared after reset.  */
 273   .noinit ${RELOCATING+ ADDR(.bss) + SIZEOF (.bss)} ${RELOCATING-0}: ${RELOCATING+ AT (ADDR (.noinit))}
 274   {
 275     ${RELOCATING+ PROVIDE (__noinit_start = .) ; }
 276     *(.noinit${RELOCATING+ .noinit.* .gnu.linkonce.n.*})
 277     ${RELOCATING+ PROVIDE (__noinit_end = .) ; }
 278     ${RELOCATING+ _end = . ;  }
 279     ${RELOCATING+ PROVIDE (__heap_start = .) ; }
 280   } ${RELOCATING+ > data}
 281 EOF
 282
 283 if test -n "${EEPROM_LENGTH}"; then
 284 cat <<EOF
 285
 286   .eeprom ${RELOCATING-0}:
 287   {
 288     /* See .data above...  */
 289     KEEP(*(.eeprom*))
 290     ${RELOCATING+ __eeprom_end = . ; }
 291   } ${RELOCATING+ > eeprom}
 292 EOF
 293 fi
 294
 295 if test "$FUSE_NAME" = "fuse" ; then
 296 cat <<EOF
 297
 298   .fuse ${RELOCATING-0}:
 299   {
 300     KEEP(*(.fuse))
 301     ${RELOCATING+KEEP(*(.lfuse))
 302     KEEP(*(.hfuse))
 303     KEEP(*(.efuse))}
 304   } ${RELOCATING+ > fuse}
 305 EOF
 306 fi
 307
 308 cat <<EOF
 309
 310   .lock ${RELOCATING-0}:
 311   {
 312     KEEP(*(.lock*))
 313   } ${RELOCATING+ > lock}
 314
 315   .signature ${RELOCATING-0}:
 316   {
 317     KEEP(*(.signature*))
 318   } ${RELOCATING+ > signature}
 319 EOF
 320
 321 if test "$FUSE_NAME" = "config" ; then
 322 cat <<EOF
 323
 324   .config ${RELOCATING-0}:
 325   {
 326     KEEP(*(.config*))
 327   } ${RELOCATING+ > config}
 328 EOF
 329 fi
 330
 331 cat <<EOF
 332
 333   /* Stabs debugging sections.  */
 334   .stab 0 : { *(.stab) }
 335   .stabstr 0 : { *(.stabstr) }
 336   .stab.excl 0 : { *(.stab.excl) }
 337   .stab.exclstr 0 : { *(.stab.exclstr) }
 338   .stab.index 0 : { *(.stab.index) }
 339   .stab.indexstr 0 : { *(.stab.indexstr) }
 340   .comment 0 : { *(.comment) }
 341   .note.gnu.build-id ${RELOCATING-0} : { *(.note.gnu.build-id) }
 342 EOF
 343
 344 . $srcdir/scripttempl/DWARF.sc
 345
 346 cat <<EOF
 347 }
 348 EOF