Question: LTO and failing objcopy in "u-boot-initial-env" target
Patrick DELAUNAY
patrick.delaunay at foss.st.com
Fri Oct 22 17:16:18 CEST 2021
Hi,
I made tests with LTO option activated on stm32mp15 boards but if have a
issue
with the U-Boot target "u-boot-initial-env" (this command used by YOCTO)
$> make u-boot-initial-env
...
GENENV u-boot-initial-env
arm-none-linux-gnueabihf-objcopy: env/common.o: can't dump section
'.rodata.default_environment' - it does not exist: file format not
recognized
sed: can't read u-boot-initial-env: No such file or directory
make[1]: *** [/local/home/frq07632/views/u-boot/Makefile:2315:
u-boot-initial-env] Error 2
make[1]: Leaving directory
'/local/home/frq07632/views/build/stm32mp15_defconfig'
make: *** [Makefile:177: sub-make] Error 2
But I reproduced it with sandbox:
$> make sandbox_defconfig
$> make all
$> make u-boot-initial-env
....
LTO u-boot
OBJCOPY u-boot-nodtb.bin
COPY u-boot.bin
GENENV u-boot-initial-env
objcopy: env/common.o: can't dump section '.rodata.default_environment'
- it does not exist: file format not recognized
sed: can't read u-boot-initial-env: No such file or directory
make: *** [Makefile:2315: u-boot-initial-env] Error 2
Do you already know this issue for other board which activate the LTO
feature ?
I don't see any remarks about this issue on mailing list.
Today I am known how to solve this issue.
PS: The same command is executed in "scripts/get_default_envs.sh"
Regards
Patrick
I am ussing gcc 10.2
gcc version 10.2.1 20201103 (GNU Toolchain for the A-profile
Architecture 10.2-2020.11 (arm-10.16))
And the name of the section change with LTO: .gnu.lto_default_environment.*
for exmaple:
$> arm-none-linux-gnueabihf-objdump -x -g -S common.o
common.o: file format elf32-littlearm
common.o
architecture: armv7, flags 0x00000011:
HAS_RELOC, HAS_SYMS
start address 0x00000000
private flags = 5000000: [Version5 EABI]
Sections:
Idx Name Size VMA LMA File off Algn
0 .text 00000000 00000000 00000000 00000034 2**0
CONTENTS, ALLOC, LOAD, READONLY, CODE
1 .data 00000000 00000000 00000000 00000034 2**0
CONTENTS, ALLOC, LOAD, DATA
2 .bss 00000000 00000000 00000000 00000034 2**0
ALLOC
3 .gnu.debuglto_.debug_info 000010a5 00000000 00000000 00000034 2**0
CONTENTS, RELOC, READONLY, EXCLUDE
4 .gnu.debuglto_.debug_abbrev 000002a1 00000000 00000000 000010d9 2**0
CONTENTS, READONLY, EXCLUDE
5 .gnu.debuglto_.debug_line 00000214 00000000 00000000 0000137a 2**0
CONTENTS, READONLY, EXCLUDE
6 .gnu.debuglto_.debug_str 000012e3 00000000 00000000 0000158e 2**0
CONTENTS, READONLY, EXCLUDE
7 .gnu.lto_.profile.69d69ac49136740e 0000000b 00000000 00000000
00002871 2**0
CONTENTS, READONLY, EXCLUDE
8 .gnu.lto_.icf.69d69ac49136740e 0000007b 00000000 00000000
0000287c 2**0
CONTENTS, READONLY, EXCLUDE
9 .gnu.lto_.ipa_sra.69d69ac49136740e 0000008c 00000000 00000000
000028f7 2**0
CONTENTS, READONLY, EXCLUDE
10 .gnu.lto_.inline.69d69ac49136740e 000002bc 00000000 00000000
00002983 2**0
CONTENTS, READONLY, EXCLUDE
11 .gnu.lto_.jmpfuncs.69d69ac49136740e 0000031c 00000000 00000000
00002c3f 2**0
CONTENTS, READONLY, EXCLUDE
12 .gnu.lto_.pureconst.69d69ac49136740e 0000002f 00000000 00000000
00002f5b 2**0
CONTENTS, READONLY, EXCLUDE
13 .gnu.lto_.lto.69d69ac49136740e 00000008 00000000 00000000
00002f8a 2**0
CONTENTS, READONLY, EXCLUDE
14 .gnu.lto_default_environment.154.69d69ac49136740e 00000507
00000000 00000000 00002f92 2**0
CONTENTS, READONLY, EXCLUDE
15 .gnu.lto_env_htab.155.69d69ac49136740e 00000062 00000000 00000000
00003499 2**0
CONTENTS, READONLY, EXCLUDE
16 .gnu.lto_env_get_yesno.156.69d69ac49136740e 00000244 00000000
00000000 000034fb 2**0
CONTENTS, READONLY, EXCLUDE
17 .gnu.lto_env_get_default.157.69d69ac49136740e 000003dc 00000000
00000000 0000373f 2**0
CONTENTS, READONLY, EXCLUDE
18 .gnu.lto_env_set_default.158.69d69ac49136740e 000004bf 00000000
00000000 00003b1b 2**0
CONTENTS, READONLY, EXCLUDE
19 .gnu.lto_env_set_default_vars.159.69d69ac49136740e 000001c1
00000000 00000000 00003fda 2**0
CONTENTS, READONLY, EXCLUDE
20 .gnu.lto_env_import.160.69d69ac49136740e 00000582 00000000
00000000 0000419b 2**0
CONTENTS, READONLY, EXCLUDE
21 .gnu.lto_env_check_redund.162.69d69ac49136740e 0000088a 00000000
00000000 0000471d 2**0
CONTENTS, READONLY, EXCLUDE
22 .gnu.lto_env_import_redund.163.69d69ac49136740e 00000461 00000000
00000000 00004fa7 2**0
CONTENTS, READONLY, EXCLUDE
23 .gnu.lto_env_export.164.69d69ac49136740e 000003a0 00000000
00000000 00005408 2**0
CONTENTS, READONLY, EXCLUDE
24 .gnu.lto_env_relocate.165.69d69ac49136740e 00000231 00000000
00000000 000057a8 2**0
CONTENTS, READONLY, EXCLUDE
25 .gnu.lto_env_complete.166.69d69ac49136740e 00000880 00000000
00000000 000059d9 2**0
CONTENTS, READONLY, EXCLUDE
26 .gnu.lto_env_relocate.part.0.203.69d69ac49136740e 000001ab
00000000 00000000 00006259 2**0
CONTENTS, READONLY, EXCLUDE
27 .gnu.lto_.symbol_nodes.69d69ac49136740e 000001f2 00000000
00000000 00006404 2**0
CONTENTS, READONLY, EXCLUDE
28 .gnu.lto_.refs.69d69ac49136740e 0000004f 00000000 00000000
000065f6 2**0
CONTENTS, READONLY, EXCLUDE
29 .gnu.lto_.decls.69d69ac49136740e 00001fbf 00000000 00000000
00006645 2**0
CONTENTS, READONLY, EXCLUDE
30 .gnu.lto_.symtab.69d69ac49136740e 000002de 00000000 00000000
00008604 2**0
CONTENTS, READONLY, EXCLUDE
31 .gnu.lto_.ext_symtab.69d69ac49136740e 00000039 00000000 00000000
000088e2 2**0
CONTENTS, READONLY, EXCLUDE
32 .gnu.lto_.opts 000001d6 00000000 00000000 0000891b 2**0
CONTENTS, READONLY, EXCLUDE
33 .comment 0000005e 00000000 00000000 00008af1 2**0
CONTENTS, READONLY
34 .note.GNU-stack 00000000 00000000 00000000 00008b4f 2**0
CONTENTS, READONLY
35 .ARM.attributes 00000031 00000000 00000000 00008b4f 2**0
CONTENTS, READONLY
SYMBOL TABLE:
00000000 l df *ABS* 00000000 common.c
00000000 l d .text 00000000 .text
00000000 l d .data 00000000 .data
00000000 l d .bss 00000000 .bss
00000000 l d .gnu.debuglto_.debug_info 00000000
.gnu.debuglto_.debug_info
00000000 l d .gnu.debuglto_.debug_abbrev 00000000
.gnu.debuglto_.debug_abbrev
00000000 l d .gnu.debuglto_.debug_line 00000000
.gnu.debuglto_.debug_line
00000000 l d .gnu.debuglto_.debug_str 00000000
.gnu.debuglto_.debug_str
00000000 l d .gnu.lto_.profile.69d69ac49136740e 00000000
.gnu.lto_.profile.69d69ac49136740e
00000000 l d .gnu.lto_.icf.69d69ac49136740e 00000000
.gnu.lto_.icf.69d69ac49136740e
00000000 l d .gnu.lto_.ipa_sra.69d69ac49136740e 00000000
.gnu.lto_.ipa_sra.69d69ac49136740e
00000000 l d .gnu.lto_.inline.69d69ac49136740e 00000000
.gnu.lto_.inline.69d69ac49136740e
00000000 l d .gnu.lto_.jmpfuncs.69d69ac49136740e 00000000
.gnu.lto_.jmpfuncs.69d69ac49136740e
00000000 l d .gnu.lto_.pureconst.69d69ac49136740e 00000000
.gnu.lto_.pureconst.69d69ac49136740e
00000000 l d .gnu.lto_.lto.69d69ac49136740e 00000000
.gnu.lto_.lto.69d69ac49136740e
00000000 l d .gnu.lto_default_environment.154.69d69ac49136740e
00000000 .gnu.lto_default_environment.154.69d69ac49136740e
00000000 l d .gnu.lto_env_htab.155.69d69ac49136740e00000000
.gnu.lto_env_htab.155.69d69ac49136740e
00000000 l d .gnu.lto_env_get_yesno.156.69d69ac49136740e 00000000
.gnu.lto_env_get_yesno.156.69d69ac49136740e
00000000 l d .gnu.lto_env_get_default.157.69d69ac49136740e 00000000
.gnu.lto_env_get_default.157.69d69ac49136740e
00000000 l d .gnu.lto_env_set_default.158.69d69ac49136740e 00000000
.gnu.lto_env_set_default.158.69d69ac49136740e
00000000 l d .gnu.lto_env_set_default_vars.159.69d69ac49136740e
00000000 .gnu.lto_env_set_default_vars.159.69d69ac49136740e
00000000 l d .gnu.lto_env_import.160.69d69ac49136740e 00000000
.gnu.lto_env_import.160.69d69ac49136740e
00000000 l d .gnu.lto_env_check_redund.162.69d69ac49136740e 00000000
.gnu.lto_env_check_redund.162.69d69ac49136740e
00000000 l d .gnu.lto_env_import_redund.163.69d69ac49136740e
00000000 .gnu.lto_env_import_redund.163.69d69ac49136740e
00000000 l d .gnu.lto_env_export.164.69d69ac49136740e 00000000
.gnu.lto_env_export.164.69d69ac49136740e
00000000 l d .gnu.lto_env_relocate.165.69d69ac49136740e 00000000
.gnu.lto_env_relocate.165.69d69ac49136740e
00000000 l d .gnu.lto_env_complete.166.69d69ac49136740e 00000000
.gnu.lto_env_complete.166.69d69ac49136740e
00000000 l d .gnu.lto_env_relocate.part.0.203.69d69ac49136740e
00000000 .gnu.lto_env_relocate.part.0.203.69d69ac49136740e
00000000 l d .gnu.lto_.symbol_nodes.69d69ac49136740e 00000000
.gnu.lto_.symbol_nodes.69d69ac49136740e
00000000 l d .gnu.lto_.refs.69d69ac49136740e 00000000
.gnu.lto_.refs.69d69ac49136740e
00000000 l d .gnu.lto_.decls.69d69ac49136740e 00000000
.gnu.lto_.decls.69d69ac49136740e
00000000 l d .gnu.lto_.symtab.69d69ac49136740e 00000000
.gnu.lto_.symtab.69d69ac49136740e
00000000 l d .gnu.lto_.ext_symtab.69d69ac49136740e 00000000
.gnu.lto_.ext_symtab.69d69ac49136740e
00000000 l d .gnu.lto_.opts 00000000 .gnu.lto_.opts
00000000 l d .note.GNU-stack 00000000 .note.GNU-stack
00000000 l d .comment 00000000 .comment
00000000 l d .ARM.attributes 00000000 .ARM.attributes
00000000 w .gnu.debuglto_.debug_info 00000000 .hidden
common.c.2c9afba8
00000001 O *COM* 00000001 __gnu_lto_slim
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