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https://sourceware.org/git/binutils-gdb.git
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2c6f3e56cb
The ".persistent" section is for data that should be initialized during load, but not during application reset. The ".noinit" section is for data that should not be initialized during load or application reset. Targets utilizing the elf.sc linker script template can define HAVE_{NOINIT,PERSISTENT}=yes to include the .noinit or .persistent output sections in the generated linker script. Targets with existing support for .noinit did not handle unique .noinit.* and .gnu.linkonce.n.* sections the .noinit output section, this patch also fixes that. bfd/ChangeLog: * elf.c (special_sections_g): Add .gnu.linkonce.n and .gnu.linkonce.p. (special_sections_n): Add .noinit. (special_sections_p): Add .persistent. binutils/ChangeLog: * testsuite/lib/binutils-common.exp (supports_noinit_section): New. (supports_persistent_section): New. gas/ChangeLog: * testsuite/gas/elf/elf.exp: Run new tests. * testsuite/gas/elf/section25.d: New test. * testsuite/gas/elf/section25.s: New test. * testsuite/gas/elf/section26.d: New test. * testsuite/gas/elf/section26.s: New test. ld/ChangeLog: * emulparams/armelf.sh (OTHER_SECTIONS): Remove .noinit section definition. Define HAVE_{NOINIT,PERSISTENT}=yes. * scripttempl/avr.sc (.noinit): Add .noinit.* and .gnu.linkonce.n.* input section wildcard patterns. * scripttempl/elf.sc: Define .noinit and .persistent sections when HAVE_NOINIT or HAVE_PERSISTENT are defined to "yes". * scripttempl/elf32msp430.sc (.noinit): Add .noinit.* and .gnu.linkonce.n.*. input section wildcard patterns. (.persistent): Add .persistent.* and .gnu.linkonce.p.*. input section wildcard patterns. * scripttempl/elfarcv2.sc (.noinit): Add .noinit.* and .gnu.linkonce.n.*. input section wildcard patterns. * scripttempl/pru.sc: Likewise. * testsuite/ld-elf/noinit-sections-1.d: New test. * testsuite/ld-elf/noinit-sections-2.d: New test. * testsuite/ld-elf/noinit-sections-2.l: New test. * testsuite/ld-elf/noinit-sections.s: New test. * testsuite/ld-elf/persistent-sections-1.d: New test. * testsuite/ld-elf/persistent-sections-2.d: New test. * testsuite/ld-elf/persistent-sections-2.l: New test. * testsuite/ld-elf/persistent-sections.s: New test.
196 lines
6.0 KiB
Python
196 lines
6.0 KiB
Python
cat <<EOF
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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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MEMORY
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{
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imem (x) : ORIGIN = $TEXT_ORIGIN, LENGTH = $TEXT_LENGTH
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dmem (rw!x) : ORIGIN = $DATA_ORIGIN, LENGTH = $DATA_LENGTH
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}
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__HEAP_SIZE = DEFINED(__HEAP_SIZE) ? __HEAP_SIZE : 32;
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__STACK_SIZE = DEFINED(__STACK_SIZE) ? __STACK_SIZE : 512;
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PROVIDE (_stack_top = ORIGIN(dmem) + LENGTH(dmem));
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ENTRY (_start)
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EOF
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cat <<EOF
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SECTIONS
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{
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/* Read-only sections, merged into text segment: */
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${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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${RELOCATING+*(.rel.text:*)}
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${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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${RELOCATING+*(.rela.text:*)}
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${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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${RELOCATING+*(.rel.rodata:*)}
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${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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${RELOCATING+*(.rela.rodata:*)}
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${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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${RELOCATING+*(.rel.data:*)}
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${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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${RELOCATING+*(.rela.data:*)}
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${RELOCATING+*(.rela.gnu.linkonce.d*)}
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}
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.rel.init_array ${RELOCATING-0} : { *(.rel.init_array) }
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.rela.init_array ${RELOCATING-0} : { *(.rela.init_array) }
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.rel.fini_array ${RELOCATING-0} : { *(.rel.fini_array) }
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.rela.fini_array ${RELOCATING-0} : { *(.rela.fini_array) }
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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. */
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.text ${RELOCATING-0} :
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{
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${RELOCATING+ _text_start = . ; }
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${RELOCATING+. = ALIGN(4);}
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${RELOCATING+*(.init0) /* Start here after reset. */}
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${RELOCATING+KEEP (*(.init0))}
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${RELOCATING+. = ALIGN(4);}
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*(.text)
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${RELOCATING+. = ALIGN(4);}
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${RELOCATING+*(.text.*)}
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${RELOCATING+. = ALIGN(4);}
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${RELOCATING+*(.text:*)}
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${RELOCATING+. = ALIGN(4);}
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${RELOCATING+*(.gnu.linkonce.t*)}
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${RELOCATING+. = ALIGN(4);}
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${RELOCATING+ _text_end = . ; }
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} ${RELOCATING+ > imem}
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.data ${RELOCATING-0} :
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{
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/* Optional variable that user is prepared to have NULL address. */
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${RELOCATING+ *(.data.atzero*)}
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/* CRT is prepared for constructor/destructor table to have
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a "valid" NULL address. */
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${CONSTRUCTING+ __init_array_start = . ; }
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${CONSTRUCTING+ KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*)))}
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${CONSTRUCTING+ KEEP (*(.init_array))}
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${CONSTRUCTING+ __init_array_end = . ; }
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${CONSTRUCTING+ __fini_array_start = . ; }
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${CONSTRUCTING+ KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*)))}
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${CONSTRUCTING+ KEEP (*(.fini_array))}
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${CONSTRUCTING+ __fini_array_end = . ; }
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${RELOCATING+/* DATA memory starts at address 0. So to avoid placing a valid static
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variable at the invalid NULL address, we introduce the .data.atzero
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section. If CRT can make some use of it - great. Otherwise skip a
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word. In all cases .data/.bss sections must start at non-zero. */
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. += (. == 0 ? 4 : 0);}
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${RELOCATING+ PROVIDE (_data_start = .) ; }
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*(.data)
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${RELOCATING+ *(.data*)}
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${RELOCATING+ *(.data:*)}
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${RELOCATING+ *(.rodata) /* We need to include .rodata here if gcc is used. */}
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${RELOCATING+ *(.rodata.*) /* with -fdata-sections. */}
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${RELOCATING+ *(.rodata:*)}
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${RELOCATING+*(.gnu.linkonce.d*)}
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${RELOCATING+*(.gnu.linkonce.r*)}
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${RELOCATING+. = ALIGN(4);}
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${RELOCATING+ PROVIDE (_data_end = .) ; }
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} ${RELOCATING+ > dmem }
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.resource_table ${RELOCATING-0} :
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{
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KEEP (*(.resource_table))
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} ${RELOCATING+ > dmem}
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.bss ${RELOCATING-0} :
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{
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${RELOCATING+ PROVIDE (_bss_start = .) ; }
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*(.bss)
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${RELOCATING+ *(.bss.*)}
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${RELOCATING+ *(.bss:*)}
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${RELOCATING+*(.gnu.linkonce.b*)}
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${RELOCATING+*(COMMON)}
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${RELOCATING+ PROVIDE (_bss_end = .) ; }
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} ${RELOCATING+ > dmem}
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/* Global data not cleared after reset. */
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.noinit ${RELOCATING-0} :
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{
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${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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${RELOCATING+ PROVIDE (_heap_start = .) ; }
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${RELOCATING+ . += __HEAP_SIZE ; }
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${RELOCATING+/* Stack is not here really. It will be put at the end of DMEM.
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But we take into account its size here, in order to allow
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for MEMORY overflow checking during link time. */}
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${RELOCATING+ . += __STACK_SIZE ; }
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} ${RELOCATING+ > dmem}
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/* Stabs debugging sections. */
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.stab 0 : { *(.stab) }
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.stabstr 0 : { *(.stabstr) }
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.stab.excl 0 : { *(.stab.excl) }
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.stab.exclstr 0 : { *(.stab.exclstr) }
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.stab.index 0 : { *(.stab.index) }
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.stab.indexstr 0 : { *(.stab.indexstr) }
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.comment 0 : { *(.comment) }
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.note.gnu.build-id ${RELOCATING-0} : { *(.note.gnu.build-id) }
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EOF
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. $srcdir/scripttempl/DWARF.sc
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cat <<EOF
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}
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EOF
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