https://sourceware.org/bugzilla/show_bug.cgi?id=30277
Bug ID: 30277
Summary: GNU as produce '.symtab' entries with incorrect order
for 32-bit MIPS target
Product: binutils
Version: 2.40
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: gas
Assignee: unassigned at sourceware dot org
Reporter: msl023508 at gmail dot com
Target Milestone: ---
I have written a simple assembly code to test this issue:
$ cat sym-order-test.s
.text
.global func2, func4, func6
func1:
nop
func2:
nop
func3:
nop
func4:
nop
func5:
nop
func6:
nop
func7:
nop
$ mips64-none-elfabi64-as -mabi=32 sym-order-test.s -o sym-order-test.o
$ readelf --symbols sym-order-test.o
Symbol table '.symtab' contains 15 entries:
Num:Value Size TypeBind Vis Ndx Name
0: 0 NOTYPE LOCAL DEFAULT UND
1: 0 SECTION LOCAL DEFAULT1 .text
2: 0 SECTION LOCAL DEFAULT2 .data
3: 0 SECTION LOCAL DEFAULT3 .bss
4: 0 SECTION LOCAL DEFAULT4 .reginfo
5: 0 SECTION LOCAL DEFAULT5 .MIPS.abiflags
6: 0 SECTION LOCAL DEFAULT6 .pdr
7: 0 SECTION LOCAL DEFAULT7 .gnu.attributes
8: 0004 0 NOTYPE GLOBAL DEFAULT1 func2
9: 000c 0 NOTYPE GLOBAL DEFAULT1 func4
10: 0014 0 NOTYPE GLOBAL DEFAULT1 func6
11: 0 NOTYPE LOCAL DEFAULT1 func1
12: 0008 0 NOTYPE LOCAL DEFAULT1 func3
13: 0010 0 NOTYPE LOCAL DEFAULT1 func5
14: 0018 0 NOTYPE LOCAL DEFAULT1 func7
$ mips64-none-elfabi64-as --version
GNU assembler (GNU Binutils) 2.40
Copyright (C) 2023 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or later.
This program has absolutely no warranty.
This assembler was configured for a target of `mips64-none-elfabi64'.
As shown by readelf(1), there are some LOCAL symbols follow the last GLOBAL
symbol, this is not allowed by ELF specification.
This issue was raised by ld(1), which rejects the problematical object file
under some conditions:
$ mips64-none-elfabi64-ld -m elf32btsmip sym-order-test.o
mips64-none-elfabi64-ld: sym-order-test.o: .symtab local symbol at index 11 (>=
sh_info of 8)
mips64-none-elfabi64-ld: sym-order-test.o: error adding symbols: bad value
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