mirror of
https://sourceware.org/git/binutils-gdb.git
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24f5deb64d
Supply these symbols as computed by the linker scripts, even when there are weak definitions. PR 31124 * scripttempl/avr.sc (__flmap, __flmap_init_label): Remove PROVIDE.
468 lines
16 KiB
Python
468 lines
16 KiB
Python
# Copyright (C) 2014-2024 Free Software Foundation, Inc.
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#
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# Copying and distribution of this file, with or without modification,
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# are permitted in any medium without royalty provided the copyright
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# notice and this notice are preserved.
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# RODATA_PM_OFFSET
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# If empty and not HAVE_FLMAP, .rodata sections will be part of .data.
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# This is for devices where it is not possible to use LD* instructions
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# to read from flash.
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#
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# If non-empty, .rodata is not part of .data and the .rodata
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# objects are assigned addresses at an offest of RODATA_PM_OFFSET.
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# This is for devices that feature reading from flash by means of
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# LD* instructions, provided the addresses are offset by
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# __RODATA_PM_OFFSET__ (which defaults to RODATA_PM_OFFSET).
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# HAVE_FLMAP
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# The .rodata section is located in program memory. Devices from
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# the AVR64* and AVR128* families (from avrxmega2 and avrxmega4)
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# see a 32k segment of their program memory in their RAM address
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# space. Which 32k segment is visible is determined by the
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# bit-field NVMCTRL_CTRLB.FLMAP.
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# Output section .rodata is placed in MEMORY region rodata.
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# The LMA of the .rodata section can be set by means of:
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# * __RODATA_FLASH_START__ specifies the byte address of the
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# rodata LMA.
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# * __flmap specifies which 32k block is visible in RAM provided
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# __RODATA_FLASH_START__ is undefined
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# * When __flmap and __RODATA_FLASH_START__ are undefined, then an
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# emulation-specific default is used (the last 32k block).
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# MAYBE_FLMAP
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# For devices from avrxmega2 and avrxmega4: The user can chose whether
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# or not .rodata is located in flash (if HAVE_FLMAP) or located in
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# in RAM (if not HAVE_FLMAP by means of -mrodata-in-ram). This is
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# achieved by new emulations avrxmega2_flmap and avrxmega4_flmap that
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# are selected by compiler option -mno-rodata-in-ram.
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#
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# In order to facilitate initialization of NVMCTRL_CTRLB.FLMAP and
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# NVMCTRL_CTRLB.FLMAPLOCK in the startup code irrespective of
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# HAVE_FLMAP, the following symbols are used / defined in order to
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# communicate with the startup code.
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# Notice that the hardware default for FLMAP is the last 32k block,
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# so that explicit initialization of FLMAP is only required when the
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# user wants to deviate from the defaults.
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#
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# __flmap = HAVE_FLMAP
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# ? given by __flmap resp. __RODATA_FLASH_START__ >> 15
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# : 0;
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#
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# __flmap_value = __flmap << __flmap_bpos;
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#
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# __flmap_value_with_lock = __flmap__value | __flmap_lock_mask;
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#
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# __flmap_init_label = HAVE_FLMAP
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# ? __flmap_init_start
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# : __flmap_noinit_start;
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# Supposed to be used as a jump target for RJMP so that the code
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# can initialize FLMAP / skip initialization of FLMAP depending
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# on the chosen emulation, and without the need to support two code
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# versions of crt<mcu>.o for the two possible emulations.
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#
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# __flmap_lock is a bool provided by the user when FLMAP should be
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# protected from any further changes.
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#
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# __flmap_lock_mask is an 8-bit mask like NVMCTRL_FLMAPLOCK_bm
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# provided by the user which is set in __flmap_value_with_lock
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# when __flmap_lock is on.
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#
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# __do_init_flmap = HAVE_FLMAP ? 1 : 0;
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# Whether or not FLMAP is supposed to be initialized according
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# to, and for the purpose of, .rodata in flash.
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#
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# Apart from that, the compiler (device-specs actually) defines the
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# following macros:
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#
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# __AVR_HAVE_FLMAP__
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# Defined if a device has the NVMCTRL_CTRLB.FLMAP bitfield
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# *AND* if it's unknown at compile-time / assembler-time whether
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# emulation avrxmega* is used or avrxmega*_flmap.
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cat <<EOF
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/* Copyright (C) 2014-2024 Free Software Foundation, Inc.
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Copying and distribution of this script, with or without modification,
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are permitted in any medium without royalty provided the copyright
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notice and this notice are preserved. */
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OUTPUT_FORMAT("${OUTPUT_FORMAT}","${OUTPUT_FORMAT}","${OUTPUT_FORMAT}")
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OUTPUT_ARCH(${ARCH})
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EOF
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test -n "${RELOCATING}" && cat <<EOF
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__TEXT_REGION_ORIGIN__ = DEFINED(__TEXT_REGION_ORIGIN__) ? __TEXT_REGION_ORIGIN__ : 0;
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__TEXT_REGION_LENGTH__ = DEFINED(__TEXT_REGION_LENGTH__) ? __TEXT_REGION_LENGTH__ : $TEXT_LENGTH;
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__DATA_REGION_ORIGIN__ = DEFINED(__DATA_REGION_ORIGIN__) ? __DATA_REGION_ORIGIN__ : $DATA_ORIGIN;
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__DATA_REGION_LENGTH__ = DEFINED(__DATA_REGION_LENGTH__) ? __DATA_REGION_LENGTH__ : $DATA_LENGTH;
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${EEPROM_LENGTH+__EEPROM_REGION_LENGTH__ = DEFINED(__EEPROM_REGION_LENGTH__) ? __EEPROM_REGION_LENGTH__ : $EEPROM_LENGTH;}
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__FUSE_REGION_LENGTH__ = DEFINED(__FUSE_REGION_LENGTH__) ? __FUSE_REGION_LENGTH__ : $FUSE_LENGTH;
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__LOCK_REGION_LENGTH__ = DEFINED(__LOCK_REGION_LENGTH__) ? __LOCK_REGION_LENGTH__ : $LOCK_LENGTH;
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__SIGNATURE_REGION_LENGTH__ = DEFINED(__SIGNATURE_REGION_LENGTH__) ? __SIGNATURE_REGION_LENGTH__ : $SIGNATURE_LENGTH;
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${USER_SIGNATURE_LENGTH+__USER_SIGNATURE_REGION_LENGTH__ = DEFINED(__USER_SIGNATURE_REGION_LENGTH__) ? __USER_SIGNATURE_REGION_LENGTH__ : $USER_SIGNATURE_LENGTH;}
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${RODATA_PM_OFFSET+__RODATA_PM_OFFSET__ = DEFINED(__RODATA_PM_OFFSET__) ? __RODATA_PM_OFFSET__ : $RODATA_PM_OFFSET;}
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${HAVE_FLMAP+__RODATA_VMA__ = ${RODATA_VMA};}
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${HAVE_FLMAP+__RODATA_LDS_OFFSET__ = DEFINED(__RODATA_LDS_OFFSET__) ? __RODATA_LDS_OFFSET__ : ${RODATA_LDS_OFFSET};}
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${HAVE_FLMAP+__RODATA_REGION_LENGTH__ = DEFINED(__RODATA_REGION_LENGTH__) ? __RODATA_REGION_LENGTH__ : ${RODATA_LENGTH};}
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${HAVE_FLMAP+__RODATA_ORIGIN__ = __RODATA_VMA__ + __RODATA_LDS_OFFSET__;}
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MEMORY
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{
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text (rx) : ORIGIN = __TEXT_REGION_ORIGIN__, LENGTH = __TEXT_REGION_LENGTH__
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data (rw!x) : ORIGIN = __DATA_REGION_ORIGIN__, LENGTH = __DATA_REGION_LENGTH__
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${EEPROM_LENGTH+ eeprom (rw!x) : ORIGIN = 0x810000, LENGTH = __EEPROM_REGION_LENGTH__}
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$FUSE_NAME (rw!x) : ORIGIN = 0x820000, LENGTH = __FUSE_REGION_LENGTH__
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lock (rw!x) : ORIGIN = 0x830000, LENGTH = __LOCK_REGION_LENGTH__
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signature (rw!x) : ORIGIN = 0x840000, LENGTH = __SIGNATURE_REGION_LENGTH__
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${USER_SIGNATURE_LENGTH+ user_signatures (rw!x) : ORIGIN = 0x850000, LENGTH = __USER_SIGNATURE_REGION_LENGTH__}
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${HAVE_FLMAP+ rodata (r!x) : ORIGIN = __RODATA_ORIGIN__, LENGTH = __RODATA_REGION_LENGTH__}
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}
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EOF
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cat <<EOF
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SECTIONS
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{
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/* Read-only sections, merged into text segment: */
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${TEXT_DYNAMIC+${DYNAMIC}}
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.hash ${RELOCATING-0} : { *(.hash) }
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.dynsym ${RELOCATING-0} : { *(.dynsym) }
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.dynstr ${RELOCATING-0} : { *(.dynstr) }
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.gnu.version ${RELOCATING-0} : { *(.gnu.version) }
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.gnu.version_d ${RELOCATING-0} : { *(.gnu.version_d) }
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.gnu.version_r ${RELOCATING-0} : { *(.gnu.version_r) }
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.rel.init ${RELOCATING-0} : { *(.rel.init) }
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.rela.init ${RELOCATING-0} : { *(.rela.init) }
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.rel.text ${RELOCATING-0} :
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{
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*(.rel.text)
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${RELOCATING+*(.rel.text.*)}
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${RELOCATING+*(.rel.gnu.linkonce.t*)}
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}
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.rela.text ${RELOCATING-0} :
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{
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*(.rela.text)
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${RELOCATING+*(.rela.text.*)}
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${RELOCATING+*(.rela.gnu.linkonce.t*)}
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}
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.rel.fini ${RELOCATING-0} : { *(.rel.fini) }
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.rela.fini ${RELOCATING-0} : { *(.rela.fini) }
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.rel.rodata ${RELOCATING-0} :
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{
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*(.rel.rodata)
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${RELOCATING+*(.rel.rodata.*)}
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${RELOCATING+*(.rel.gnu.linkonce.r*)}
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}
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.rela.rodata ${RELOCATING-0} :
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{
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*(.rela.rodata)
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${RELOCATING+*(.rela.rodata.*)}
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${RELOCATING+*(.rela.gnu.linkonce.r*)}
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}
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.rel.data ${RELOCATING-0} :
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{
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*(.rel.data)
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${RELOCATING+*(.rel.data.*)}
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${RELOCATING+*(.rel.gnu.linkonce.d*)}
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}
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.rela.data ${RELOCATING-0} :
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{
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*(.rela.data)
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${RELOCATING+*(.rela.data.*)}
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${RELOCATING+*(.rela.gnu.linkonce.d*)}
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}
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.rel.ctors ${RELOCATING-0} : { *(.rel.ctors) }
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.rela.ctors ${RELOCATING-0} : { *(.rela.ctors) }
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.rel.dtors ${RELOCATING-0} : { *(.rel.dtors) }
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.rela.dtors ${RELOCATING-0} : { *(.rela.dtors) }
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.rel.got ${RELOCATING-0} : { *(.rel.got) }
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.rela.got ${RELOCATING-0} : { *(.rela.got) }
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.rel.bss ${RELOCATING-0} : { *(.rel.bss) }
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.rela.bss ${RELOCATING-0} : { *(.rela.bss) }
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.rel.plt ${RELOCATING-0} : { *(.rel.plt) }
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.rela.plt ${RELOCATING-0} : { *(.rela.plt) }
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/* Internal text space or external memory. */
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.text ${RELOCATING-0} :
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{
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${RELOCATING+*(.vectors)
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KEEP(*(.vectors))
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/* For data that needs to reside in the lower 64k of progmem. */
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*(.progmem.gcc*)
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/* PR 13812: Placing the trampolines here gives a better chance
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that they will be in range of the code that uses them. */
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. = ALIGN(2);
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__trampolines_start = . ;
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/* The jump trampolines for the 16-bit limited relocs will reside here. */
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*(.trampolines)
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*(.trampolines*)
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__trampolines_end = . ;
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/* avr-libc expects these data to reside in lower 64K. */
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*libprintf_flt.a:*(.progmem.data)
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*libc.a:*(.progmem.data)
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*(.progmem.*)
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. = ALIGN(2);
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/* For code that needs to reside in the lower 128k progmem. */
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*(.lowtext)
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*(.lowtext*)}
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${CONSTRUCTING+ __ctors_start = . ; }
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${CONSTRUCTING+ *(.ctors) }
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${CONSTRUCTING+ __ctors_end = . ; }
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${CONSTRUCTING+ __dtors_start = . ; }
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${CONSTRUCTING+ *(.dtors) }
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${CONSTRUCTING+ __dtors_end = . ; }
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${RELOCATING+KEEP(SORT(*)(.ctors))
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KEEP(SORT(*)(.dtors))
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/* From this point on, we do not bother about whether the insns are
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below or above the 16 bits boundary. */
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*(.init0) /* Start here after reset. */
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KEEP (*(.init0))
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*(.init1)
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KEEP (*(.init1))
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*(.init2) /* Clear __zero_reg__, set up stack pointer. */
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KEEP (*(.init2))
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*(.init3)
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KEEP (*(.init3))
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*(.init4) /* Initialize data and BSS. */
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KEEP (*(.init4))
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*(.init5)
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KEEP (*(.init5))
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*(.init6) /* C++ constructors. */
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KEEP (*(.init6))
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*(.init7)
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KEEP (*(.init7))
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*(.init8)
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KEEP (*(.init8))
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*(.init9) /* Call main(). */
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KEEP (*(.init9))}
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*(.text)
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${RELOCATING+. = ALIGN(2);
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*(.text.*)
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. = ALIGN(2);
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*(.fini9) /* _exit() starts here. */
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KEEP (*(.fini9))
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*(.fini8)
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KEEP (*(.fini8))
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*(.fini7)
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KEEP (*(.fini7))
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*(.fini6) /* C++ destructors. */
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KEEP (*(.fini6))
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*(.fini5)
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KEEP (*(.fini5))
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*(.fini4)
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KEEP (*(.fini4))
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*(.fini3)
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KEEP (*(.fini3))
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*(.fini2)
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KEEP (*(.fini2))
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*(.fini1)
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KEEP (*(.fini1))
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*(.fini0) /* Infinite loop after program termination. */
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KEEP (*(.fini0))
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/* For code that needs not to reside in the lower progmem. */
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*(.hightext)
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*(.hightext*)
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*(.progmemx.*)
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. = ALIGN(2);
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/* For tablejump instruction arrays. We do not relax
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JMP / CALL instructions within these sections. */
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*(.jumptables)
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*(.jumptables*)
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_etext = . ;}
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} ${RELOCATING+ > text}
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EOF
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# Devices like ATtiny816 allow to read from flash memory by means of LD*
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# instructions provided we add an offset of __RODATA_PM_OFFSET__ to the
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# flash addresses.
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if test -n "$RODATA_PM_OFFSET"; then
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cat <<EOF
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.rodata ${RELOCATING+ ADDR(.text) + SIZEOF (.text) + __RODATA_PM_OFFSET__ } ${RELOCATING-0} :
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{
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*(.rodata)
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${RELOCATING+ *(.rodata*)
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*(.gnu.linkonce.r*)}
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} ${RELOCATING+AT> text}
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EOF
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fi
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cat <<EOF
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.data ${RELOCATING-0} :
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{
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${RELOCATING+ PROVIDE (__data_start = .) ; }
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*(.data)
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${RELOCATING+ *(.data*)
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*(.gnu.linkonce.d*)}
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EOF
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# Classical devices that don't show flash memory in the SRAM address space
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# need .rodata to be part of .data because the compiler will use LD*
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# instructions and LD* cannot access flash.
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if test -z "$RODATA_PM_OFFSET" && test -z "${HAVE_FLMAP}" && test -n "${RELOCATING}"; then
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cat <<EOF
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*(.rodata) /* We need to include .rodata here if gcc is used */
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*(.rodata*) /* with -fdata-sections. */
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*(.gnu.linkonce.r*)
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EOF
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fi
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cat <<EOF
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${RELOCATING+. = ALIGN(2);}
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${RELOCATING+ _edata = . ; }
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${RELOCATING+ PROVIDE (__data_end = .) ; }
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} ${RELOCATING+ > data ${RELOCATING+AT> text}}
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.bss ${RELOCATING+ ADDR(.data) + SIZEOF (.data)} ${RELOCATING-0} :${RELOCATING+ AT (ADDR (.bss))}
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{
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${RELOCATING+ PROVIDE (__bss_start = .) ; }
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*(.bss)
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${RELOCATING+ *(.bss*)}
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${RELOCATING+ *(COMMON)}
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${RELOCATING+ PROVIDE (__bss_end = .) ; }
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} ${RELOCATING+ > data}
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${RELOCATING+ __data_load_start = LOADADDR(.data); }
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${RELOCATING+ __data_load_end = __data_load_start + SIZEOF(.data); }
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/* Global data not cleared after reset. */
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.noinit ${RELOCATING+ ADDR(.bss) + SIZEOF (.bss)} ${RELOCATING-0}: ${RELOCATING+ AT (ADDR (.noinit))}
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{
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${RELOCATING+ PROVIDE (__noinit_start = .) ; }
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*(.noinit${RELOCATING+ .noinit.* .gnu.linkonce.n.*})
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${RELOCATING+ PROVIDE (__noinit_end = .) ; }
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${RELOCATING+ _end = . ; }
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${RELOCATING+ PROVIDE (__heap_start = .) ; }
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} ${RELOCATING+ > data}
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EOF
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# Devices like AVR128DA32 and AVR64DA32 see a 32 KiB block of their program
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# memory at 0x8000 (RODATA_LDS_OFFSET). Which portion will be determined by
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# bitfield NVMCTRL_CTRLB.FLMAP.
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if test -z "${HAVE_FLMAP}" && test -n "${RELOCATING}"; then
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cat <<EOF
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__flmap_init_label = DEFINED(__flmap_noinit_start) ? __flmap_noinit_start : 0 ;
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__flmap = DEFINED(__flmap) ? __flmap : 0 ;
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EOF
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fi
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if test -n "${HAVE_FLMAP}"; then
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cat <<EOF
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${RELOCATING+
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__flmap_init_label = DEFINED(__flmap_init_start) ? __flmap_init_start : 0 ;
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/* User can specify position of .rodata in flash (LMA) by supplying
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__RODATA_FLASH_START__ or __flmap, where the former takes precedence. */
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__RODATA_FLASH_START__ = DEFINED(__RODATA_FLASH_START__)
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? __RODATA_FLASH_START__
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: DEFINED(__flmap) ? __flmap * 32K : ${RODATA_FLASH_START};
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ASSERT (__RODATA_FLASH_START__ % 32K == 0, \"__RODATA_FLASH_START__ must be a multiple of 32 KiB\")
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__flmap = ${FLMAP_MASK} & (__RODATA_FLASH_START__ >> 15);
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__RODATA_FLASH_START__ = __flmap << 15;
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__rodata_load_start = MAX (__data_load_end, __RODATA_FLASH_START__);
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__rodata_start = __RODATA_ORIGIN__ + __rodata_load_start - __RODATA_FLASH_START__;}
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.rodata ${RELOCATING+ __rodata_start} ${RELOCATING-0} : ${RELOCATING+ AT (__rodata_load_start)}
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{
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*(.rodata)
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${RELOCATING+ *(.rodata*)}
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${RELOCATING+ *(.gnu.linkonce.r*)}
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${RELOCATING+ __rodata_end = ABSOLUTE(.) ;}
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} ${RELOCATING+ > rodata}
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${RELOCATING+ __rodata_load_end = __rodata_load_start + __rodata_end - __rodata_start;}
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EOF
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fi
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if test -n "${MAYBE_FLMAP}" && test -n "${RELOCATING}"; then
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cat <<EOF
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__do_init_flmap = ${HAVE_FLMAP-0};
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__flmap_value = __flmap << (DEFINED(__flmap_bpos) ? __flmap_bpos : 4);
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__flmap_value_with_lock =
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__flmap_value | (DEFINED(__flmap_lock) && DEFINED(__flmap_lock_mask)
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? (__flmap_lock && __do_init_flmap ? __flmap_lock_mask : 0)
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: 0);
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EOF
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fi
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|
|
if test -n "${EEPROM_LENGTH}"; then
|
|
cat <<EOF
|
|
|
|
.eeprom ${RELOCATING-0}:
|
|
{
|
|
/* See .data above... */
|
|
KEEP(*(.eeprom*))
|
|
${RELOCATING+ __eeprom_end = . ; }
|
|
} ${RELOCATING+ > eeprom}
|
|
EOF
|
|
fi
|
|
|
|
if test "$FUSE_NAME" = "fuse" ; then
|
|
cat <<EOF
|
|
|
|
.fuse ${RELOCATING-0}:
|
|
{
|
|
KEEP(*(.fuse))
|
|
${RELOCATING+KEEP(*(.lfuse))
|
|
KEEP(*(.hfuse))
|
|
KEEP(*(.efuse))}
|
|
} ${RELOCATING+ > fuse}
|
|
EOF
|
|
fi
|
|
|
|
cat <<EOF
|
|
|
|
.lock ${RELOCATING-0}:
|
|
{
|
|
KEEP(*(.lock*))
|
|
} ${RELOCATING+ > lock}
|
|
|
|
.signature ${RELOCATING-0}:
|
|
{
|
|
KEEP(*(.signature*))
|
|
} ${RELOCATING+ > signature}
|
|
EOF
|
|
|
|
if test "$FUSE_NAME" = "config" ; then
|
|
cat <<EOF
|
|
|
|
.config ${RELOCATING-0}:
|
|
{
|
|
KEEP(*(.config*))
|
|
} ${RELOCATING+ > config}
|
|
EOF
|
|
fi
|
|
|
|
source_sh $srcdir/scripttempl/misc-sections.sc
|
|
|
|
cat <<EOF
|
|
.note.gnu.build-id ${RELOCATING-0} : { *(.note.gnu.build-id) }
|
|
EOF
|
|
|
|
source_sh $srcdir/scripttempl/DWARF.sc
|
|
|
|
cat <<EOF
|
|
}
|
|
EOF
|