https://sourceware.org/bugzilla/show_bug.cgi?id=18599
Bug ID: 18599
Summary: Use .strtab section for section names in ELF object
files
Product: binutils
Version: 2.26 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: gas
Assignee: unassigned at sourceware dot org
Reporter: hjl.tools at gmail dot com
Target Milestone: ---
[hjl@gnu-6 xxx]$ cat x.S
#define GLOBAL(x) \
.section .data.##x,"aw",%progbits; \
.globl x; x: .byte 0
GLOBAL(xxxxxxxxxxxxxxxxx1)
GLOBAL(xxxxxxxxxxxxxxxxx2)
GLOBAL(xxxxxxxxxxxxxxxxx3)
GLOBAL(xxxxxxxxxxxxxxxxx4)
[hjl@gnu-6 xxx]$ make
gcc -B./ -c -o x.o x.S
./ld -shared -o x.so x.o
readelf -x .strtab -x .shstrtab x.o
Hex dump of section '.shstrtab':
0x00000000 002e7379 6d746162 002e7374 72746162 ..symtab..strtab
0x00000010 002e7368 73747274 6162002e 74657874 ..shstrtab..text
0x00000020 002e6461 7461002e 62737300 2e646174 ..data..bss..dat
0x00000030 612e7878 78787878 78787878 78787878 a.xxxxxxxxxxxxxx
0x00000040 78787831 002e6461 74612e78 78787878 xxx1..data.xxxxx
0x00000050 78787878 78787878 78787878 32002e64 xxxxxxxxxxxx2..d
0x00000060 6174612e 78787878 78787878 78787878 ata.xxxxxxxxxxxx
0x00000070 78787878 7833002e 64617461 2e787878 xxxxx3..data.xxx
0x00000080 78787878 78787878 78787878 78783400 xxxxxxxxxxxxxx4.
Hex dump of section '.strtab':
0x00000000 00787878 78787878 78787878 78787878 .xxxxxxxxxxxxxxx
0x00000010 78783100 78787878 78787878 78787878 xx1.xxxxxxxxxxxx
0x00000020 78787878 78320078 78787878 78787878 xxxxx2.xxxxxxxxx
0x00000030 78787878 78787878 33007878 78787878 xxxxxxxx3.xxxxxx
0x00000040 78787878 78787878 78787834 00 xxxxxxxxxxx4.
[hjl@gnu-6 xxx]$
If we use .strtab, instead of .shstrtab, for section names in object
files, it will reduce file size for object files compiled with
"-ffunction-sections -fdata-sections".
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