https://sourceware.org/bugzilla/show_bug.cgi?id=32961
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Last reconfirmed| |2025-05-13
Assignee|unassigned at sourceware dot org |hjl.tools at gmail dot
com
Status|UNCONFIRMED |WAITING
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 16082
--> https://sourceware.org/bugzilla/attachment.cgi?id=16082&action=edit
A patch to add --unique-pushsection
Please try this. I got
[hjl@gnu-tgl-3 pr32961]$ make
gcc -B./ -Wa,--unique-pushsection -O2 -ffunction-sections -c -o x.o x.c
./ld -e entry_func --gc-sections -o x x.o
readelf -sW x
Symbol table '.symtab' contains 6 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND
1: 0000000000000000 0 FILE LOCAL DEFAULT ABS x.c
2: 0000000000400160 6 FUNC GLOBAL DEFAULT 1 entry_func
3: 0000000000402000 0 NOTYPE GLOBAL DEFAULT 4 __bss_start
4: 0000000000402000 0 NOTYPE GLOBAL DEFAULT 4 _edata
5: 0000000000402000 0 NOTYPE GLOBAL DEFAULT 4 _end
[hjl@gnu-tgl-3 pr32961]$ readelf -SW x.o
There are 25 section headers, starting at offset 0x480:
Section Headers:
[Nr] Name Type Address Off Size ES Flg
Lk Inf Al
[ 0] NULL 0000000000000000 000000 000000 00
0 0 0
[ 1] .text PROGBITS 0000000000000000 000040 000000 00 AX
0 0 1
[ 2] .data PROGBITS 0000000000000000 000040 000000 00 WA
0 0 1
[ 3] .bss NOBITS 0000000000000000 000040 000000 00 WA
0 0 1
[ 4] .text.foo1 PROGBITS 0000000000000000 000040 000001 00 AX
0 0 16
[ 5] .text.foo2 PROGBITS 0000000000000000 000048 000006 00 AX
0 0 16
[ 6] .rela.text.foo2 RELA 0000000000000000 000298 000018 18 I
22 5 8
[ 7] .alt_section.text.foo1 PROGBITS 0000000000000000 00004e 000005 00
AX 0 0 1
[ 8] .rela.alt_section.text.foo1 RELA 0000000000000000 0002b0
000018 18 I 22 7 8
[ 9] .text.foo3 PROGBITS 0000000000000000 000058 000006 00 AX
0 0 16
[10] .rela.text.foo3 RELA 0000000000000000 0002c8 000018 18 I
22 9 8
[11] .alt_section.text.foo2 PROGBITS 0000000000000000 00005e 000005 00
AX 0 0 1
[12] .rela.alt_section.text.foo2 RELA 0000000000000000 0002e0
000018 18 I 22 11 8
[13] .text.entry_func PROGBITS 0000000000000000 000068 000006 00 AX
0 0 16
[14] .rela.text.entry_func RELA 0000000000000000 0002f8 000018 18
I 22 13 8
[15] .alt_section.text.foo3 PROGBITS 0000000000000000 00006e 000005 00
AX 0 0 1
[16] .rela.alt_section.text.foo3 RELA 0000000000000000 000310
000018 18 I 22 15 8
[17] .comment PROGBITS 0000000000000000 000073 00002f 01 MS
0 0 1
[18] .note.GNU-stack PROGBITS 0000000000000000 0000a2 000000 00
0 0 1
[19] .note.gnu.property NOTE 0000000000000000 0000a8 000030 00 A
0 0 8
[20] .eh_frame PROGBITS 0000000000000000 0000d8 000068 00 A
0 0 8
[21] .rela.eh_frame RELA 0000000000000000 000328 000060 18 I
22 20 8
[22] .symtab SYMTAB 0000000000000000 000140 000138 18
23 9 8
[23] .strtab STRTAB 0000000000000000 000278 00001f 00
0 0 1
[24] .shstrtab STRTAB 0000000000000000 000388 0000f1 00
0 0 1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings), I (info),
L (link order), O (extra OS processing required), G (group), T (TLS),
C (compressed), x (unknown), o (OS specific), E (exclude),
D (mbind), l (large), p (processor specific)
[hjl@gnu-tgl-3 pr32961]$
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