+2020-11-27 Jozef Lawrynowicz <jozef.l@mittosystems.com>
+
+ * elf.c (special_sections_g): Add .gnu.linkonce.n and .gnu.linkonce.p.
+ (special_sections_n): Add .noinit.
+ (special_sections_p): Add .persistent.
+
2020-11-26 Nick Clifton <nickc@redhat.com>
PR 26946
static const struct bfd_elf_special_section special_sections_g[] =
{
{ STRING_COMMA_LEN (".gnu.linkonce.b"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
+ { STRING_COMMA_LEN (".gnu.linkonce.n"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
+ { STRING_COMMA_LEN (".gnu.linkonce.p"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
{ STRING_COMMA_LEN (".gnu.lto_"), -1, SHT_PROGBITS, SHF_EXCLUDE },
{ STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
{ STRING_COMMA_LEN (".gnu.version"), 0, SHT_GNU_versym, 0 },
static const struct bfd_elf_special_section special_sections_n[] =
{
+ { STRING_COMMA_LEN (".noinit"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
{ STRING_COMMA_LEN (".note.GNU-stack"), 0, SHT_PROGBITS, 0 },
{ STRING_COMMA_LEN (".note"), -1, SHT_NOTE, 0 },
{ NULL, 0, 0, 0, 0 }
static const struct bfd_elf_special_section special_sections_p[] =
{
+ { STRING_COMMA_LEN (".persistent"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
{ STRING_COMMA_LEN (".preinit_array"), -2, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
{ STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
{ NULL, 0, 0, 0, 0 }
+2020-11-27 Jozef Lawrynowicz <jozef.l@mittosystems.com>
+
+ * testsuite/lib/binutils-common.exp (supports_noinit_section): New.
+ (supports_persistent_section): New.
+
2020-11-23 Nick Alcock <nick.alcock@oracle.com>
* readelf.c (dump_section_as_ctf): Call ctf_arc_symsect_endianness.
return $relro_available_saved
}
+# Check for support of the .noinit section, used for data that is not
+# initialized at load, or during the application's initialization sequence.
+proc supports_noinit_section {} {
+ # .noinit is only supported by ELF targets.
+ if { ![is_elf_format] } {
+ return 0;
+ }
+
+ # Targets that set HAVE_NOINIT=yes in their emulparams script utilizing
+ # elf.sc, or explicitly define a .noinit section in their linker script.
+ #
+ # arc-*-* is not included here, since it only supports .noinit with the
+ # non-default arcv2elf emulation.
+ if {[istarget "arm-*-*"]
+ || [istarget "avr-*-*"]
+ || [istarget "msp430-*-*"]
+ || [istarget "pru-*-*"] } {
+ return 1;
+ }
+ return 0;
+}
+
+# Check for support of the .persistent section, used for data that is
+# initialized at load, but not during the application's initialization sequence.
+proc supports_persistent_section {} {
+ # .persistent is only supported by ELF targets.
+ if { ![is_elf_format] } {
+ return 0;
+ }
+
+ # Targets that set HAVE_PERSISTENT=yes in their emulparams script utilizing
+ # elf.sc, or explicitly define a .persistent section in their linker script.
+ if { [istarget "arm-*-*"]
+ || [istarget "msp430-*-*"] } {
+ return 1;
+ }
+ return 0;
+}
+
# Compare two files line-by-line. FILE_1 is the actual output and FILE_2
# is the expected output. Ignore blank lines in either file.
#
+2020-11-27 Jozef Lawrynowicz <jozef.l@mittosystems.com>
+
+ * 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.
+
2020-11-25 Alan Modra <amodra@gmail.com>
* output-file.c (output_file_close): Remove "can't close" from
run_dump_test "section23b"
run_dump_test "section24a"
run_dump_test "section24b"
+ run_dump_test "section25"
+ run_dump_test "section26"
run_dump_test "sh-link-zero"
run_dump_test "dwarf2-1" $dump_opts
run_dump_test "dwarf2-2" $dump_opts
--- /dev/null
+#name: sections 25 (.noinit)
+#target: [supports_noinit_section]
+#source: section25.s
+#readelf: -S --wide
+
+#...
+ \[..\] .noinit[ ]+NOBITS[ ]+[0-9a-f]+ [0-9a-f]+ [0-9a-f]+ 00 WA .*
+#...
+ \[..\] .noinit.foo[ ]+NOBITS[ ]+[0-9a-f]+ [0-9a-f]+ [0-9a-f]+ 00 WA .*
+#...
+ \[..\] .gnu.linkonce.n.bar[ ]+NOBITS[ ]+[0-9a-f]+ [0-9a-f]+ [0-9a-f]+ 00 WA .*
+#pass
--- /dev/null
+.section .noinit
+.word 0
+
+.section .noinit.foo
+.word 0
+
+.section .gnu.linkonce.n.bar
+.word 0
--- /dev/null
+#name: sections 26 (.persistent)
+#target: [supports_persistent_section]
+#source: section26.s
+#readelf: -S --wide
+
+#...
+ \[..\] .persistent[ ]+PROGBITS[ ]+[0-9a-f]+ [0-9a-f]+ [0-9a-f]+ 00 WA .*
+#...
+ \[..\] .persistent.foo[ ]+PROGBITS[ ]+[0-9a-f]+ [0-9a-f]+ [0-9a-f]+ 00 WA .*
+#...
+ \[..\] .gnu.linkonce.p.bar[ ]+PROGBITS[ ]+[0-9a-f]+ [0-9a-f]+ [0-9a-f]+ 00 WA .*
+#pass
--- /dev/null
+.section .persistent
+.word 0
+
+.section .persistent.foo
+.word 0
+
+.section .gnu.linkonce.p.bar
+.word 0
+2020-11-27 Jozef Lawrynowicz <jozef.l@mittosystems.com>
+
+ * 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.
+
2020-11-26 Alan Modra <amodra@gmail.com>
PR 26936
OTHER_BSS_SYMBOLS="${CREATE_SHLIB+PROVIDE (}__bss_start__ = .${CREATE_SHLIB+)};"
OTHER_BSS_END_SYMBOLS="${CREATE_SHLIB+PROVIDE (}_bss_end__ = .${CREATE_SHLIB+)}; ${CREATE_SHLIB+PROVIDE (}__bss_end__ = .${CREATE_SHLIB+)};"
OTHER_END_SYMBOLS="${CREATE_SHLIB+PROVIDE (}__end__ = .${CREATE_SHLIB+)};"
-OTHER_SECTIONS='
-.note.gnu.arm.ident 0 : { KEEP (*(.note.gnu.arm.ident)) }
-/* This section contains data that is not initialised during load
- *or* application reset. */
- .noinit (NOLOAD) :
- {
- . = ALIGN(2);
- PROVIDE (__noinit_start = .);
- *(.noinit)
- . = ALIGN(2);
- PROVIDE (__noinit_end = .);
- }
-'
+OTHER_SECTIONS='.note.gnu.arm.ident 0 : { KEEP (*(.note.gnu.arm.ident)) }'
ATTRS_SECTIONS='.ARM.attributes 0 : { KEEP (*(.ARM.attributes)) KEEP (*(.gnu.attributes)) }'
OTHER_READONLY_SECTIONS="
.ARM.extab ${RELOCATING-0} : { *(.ARM.extab${RELOCATING+* .gnu.linkonce.armextab.*}) }
# ARM does not support .s* sections.
NO_SMALL_DATA=yes
+
+# ARM supports the .noinit and .persistent sections.
+HAVE_NOINIT=yes
+HAVE_PERSISTENT=yes
.noinit ${RELOCATING+ ADDR(.bss) + SIZEOF (.bss)} ${RELOCATING-0}: ${RELOCATING+ AT (ADDR (.noinit))}
{
${RELOCATING+ PROVIDE (__noinit_start = .) ; }
- *(.noinit*)
+ *(.noinit${RELOCATING+ .noinit.* .gnu.linkonce.n.*})
${RELOCATING+ PROVIDE (__noinit_end = .) ; }
${RELOCATING+ _end = . ; }
${RELOCATING+ PROVIDE (__heap_start = .) ; }
# NOP - four byte opcode for no-op (defaults to none)
# NO_SMALL_DATA - no .sbss/.sbss2/.sdata/.sdata2 sections if not
# empty.
+# HAVE_NOINIT - Include a .noinit output section in the script.
+# HAVE_PERSISTENT - Include a .persistent output section in the script.
# SMALL_DATA_CTOR - .ctors contains small data.
# SMALL_DATA_DTOR - .dtors contains small data.
# DATA_ADDR - if end-of-text-plus-one-page isn't right for data start
# .lrodata .gnu.linkonce.lr.foo
# .ldata .gnu.linkonce.l.foo
# .lbss .gnu.linkonce.lb.foo
+# .noinit .gnu.linkonce.n.foo
+# .persistent .gnu.linkonce.p.foo
#
# Each of these can also have corresponding .rel.* and .rela.* sections.
*(.stack)
${RELOCATING+${STACK_SENTINEL}}
}"
+test "${HAVE_NOINIT}" = "yes" && NOINIT="
+ /* This section contains data that is not initialized during load,
+ or during the application's initialization sequence. */
+ .noinit (NOLOAD) :
+ {
+ ${RELOCATING+. = ALIGN(${ALIGNMENT});}
+ ${RELOCATING+PROVIDE (__noinit_start = .);}
+ *(.noinit${RELOCATING+ .noinit.* .gnu.linkonce.n.*})
+ ${RELOCATING+. = ALIGN(${ALIGNMENT});}
+ ${RELOCATING+PROVIDE (__noinit_end = .);}
+ }"
+test "${HAVE_PERSISTENT}" = "yes" && PERSISTENT="
+ /* This section contains data that is initialized during load,
+ but not during the application's initialization sequence. */
+ .persistent :
+ {
+ ${RELOCATING+. = ALIGN(${ALIGNMENT});}
+ ${RELOCATING+PROVIDE (__persistent_start = .);}
+ *(.persistent${RELOCATING+ .persistent.* .gnu.linkonce.p.*})
+ ${RELOCATING+. = ALIGN(${ALIGNMENT});}
+ ${RELOCATING+PROVIDE (__persistent_end = .);}
+ }"
TEXT_START_ADDR="SEGMENT_START(\"text-segment\", ${TEXT_START_ADDR})"
SHLIB_TEXT_START_ADDR="SEGMENT_START(\"text-segment\", ${SHLIB_TEXT_START_ADDR:-0})"
${DATA_SDATA-${SDATA}}
${DATA_SDATA-${OTHER_SDATA_SECTIONS}}
${RELOCATING+${DATA_END_SYMBOLS-${CREATE_SHLIB+PROVIDE (}${USER_LABEL_PREFIX}_edata = .${CREATE_SHLIB+)}; PROVIDE (${USER_LABEL_PREFIX}edata = .);}}
+ ${PERSISTENT}
${RELOCATING+. = .;}
${RELOCATING+${CREATE_SHLIB+PROVIDE (}${USER_LABEL_PREFIX}__bss_start = .${CREATE_SHLIB+)};}
${RELOCATING+${OTHER_BSS_SYMBOLS}}
${OTHER_BSS_SECTIONS}
${LARGE_BSS_AFTER_BSS+${LARGE_BSS}}
${RELOCATING+${OTHER_BSS_END_SYMBOLS}}
+ ${NOINIT}
${RELOCATING+. = ALIGN(${ALIGNMENT});}
EOF
} ${RELOCATING+ > data}
${RELOCATING+ PROVIDE (__bsssize = SIZEOF(.bss)); }
+ /* This section contains data that is not initialized during load,
+ or during the application's initialization sequence. */
.noinit ${RELOCATING-0}${RELOCATING+SIZEOF(.bss) + ADDR(.bss)} :
{
+ ${RELOCATING+. = ALIGN(2);}
${RELOCATING+ PROVIDE (__noinit_start = .) ; }
- *(.noinit)
+ *(.noinit${RELOCATING+ .noinit.* .gnu.linkonce.n.*})
+ ${RELOCATING+. = ALIGN(2);}
${RELOCATING+ PROVIDE (__noinit_end = .) ; }
} ${RELOCATING+ > data}
+ /* This section contains data that is initialized during load,
+ but not during the application's initialization sequence. */
.persistent ${RELOCATING-0}${RELOCATING+SIZEOF(.noinit) + ADDR(.noinit)} :
{
+ ${RELOCATING+. = ALIGN(2);}
${RELOCATING+ PROVIDE (__persistent_start = .) ; }
- *(.persistent)
+ *(.persistent${RELOCATING+ .persistent.* .gnu.linkonce.p.*})
+ ${RELOCATING+. = ALIGN(2);}
${RELOCATING+ PROVIDE (__persistent_end = .) ; }
} ${RELOCATING+ > data}
/* Global data not cleared after reset. */
.noinit ${RELOCATING-0}:
{
- *(.noinit*)
+ *(.noinit${RELOCATING+ .noinit.* .gnu.linkonce.n.*})
${RELOCATING+. = ALIGN(${ALIGNMENT});}
${RELOCATING+ PROVIDE (__start_heap = .) ; }
} ${RELOCATING+ > ${DATA_MEMORY}}
.noinit ${RELOCATING-0} :
{
${RELOCATING+ PROVIDE (_noinit_start = .) ; }
- *(.noinit)
+ *(.noinit${RELOCATING+ .noinit.* .gnu.linkonce.n.*})
${RELOCATING+ PROVIDE (_noinit_end = .) ; }
${RELOCATING+ PROVIDE (_heap_start = .) ; }
${RELOCATING+ . += __HEAP_SIZE ; }
--- /dev/null
+#name: .noinit sections
+#ld: --orphan-handling=warn -e _start
+#source: noinit-sections.s
+#target: [supports_noinit_section]
+#readelf: -SW
+
+#...
+ +\[ *[0-9]+\] \.noinit +NOBITS +[0-9a-f]+ +[0-9a-f]+ [0-9a-f]+ +00 +WA .*
+#pass
--- /dev/null
+#name: .noinit sections (ld -r)
+#ld: --orphan-handling=warn -e _start -r
+#source: noinit-sections.s
+#target: [supports_noinit_section]
+#readelf: -SW
+#warning_output: noinit-sections-2.l
+
+#...
+ +\[ *[0-9]+\] \.noinit +NOBITS +[0-9a-f]+ +[0-9a-f]+ [0-9a-f]+ +00 +WA .*
+#pass
--- /dev/null
+#...
+[^:]*: warning: orphan section `.noinit.var_noinit' from \S+ being placed in section `.noinit.var_noinit'
+#...
+[^:]*: warning: orphan section `.gnu.linkonce.n.var_noinit2' from \S+ being placed in section `.gnu.linkonce.n.var_noinit2'
+#pass
--- /dev/null
+.section .noinit,"aw",%nobits
+.word 0
+
+.section .noinit.var_noinit,"aw",%nobits
+.word 0
+
+.section .gnu.linkonce.n.var_noinit2,"aw",%nobits
+.word 0
+
+.text
+.global _start
+_start:
+.word 0
--- /dev/null
+#name: .persistent sections
+#ld: --orphan-handling=warn -e _start
+#source: persistent-sections.s
+#target: [supports_persistent_section]
+#readelf: -SW
+
+#...
+ +\[ *[0-9]+\] \.persistent +PROGBITS +[0-9a-f]+ +[0-9a-f]+ [0-9a-f]+ +00 +WA .*
+#pass
--- /dev/null
+#name: .persistent sections (ld -r)
+#ld: --orphan-handling=warn -e _start -r
+#source: persistent-sections.s
+#target: [supports_persistent_section]
+#readelf: -SW
+#warning_output: persistent-sections-2.l
+
+#...
+ +\[ *[0-9]+\] \.persistent +PROGBITS +[0-9a-f]+ +[0-9a-f]+ [0-9a-f]+ +00 +WA .*
+#pass
--- /dev/null
+#...
+[^:]*: warning: orphan section `.persistent.var_persistent' from \S+ being placed in section `.persistent.var_persistent'
+#...
+[^:]*: warning: orphan section `.gnu.linkonce.p.var_persistent2' from \S+ being placed in section `.gnu.linkonce.p.var_persistent2'
+#pass
--- /dev/null
+.section .persistent,"aw"
+.word 1
+
+.section .persistent.var_persistent,"aw"
+.word 2
+
+.section .gnu.linkonce.p.var_persistent2,"aw"
+.word 3
+
+.text
+.global _start
+_start:
+.word 0
projects / binutils-gdb.git / commitdiff