https://sourceware.org/bugzilla/show_bug.cgi?id=17795
Bug ID: 17795
Summary: Initial-Exec to Local-Exec may change the previous
instruction
Product: binutils
Version: 2.26 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: gold
Assignee: ccoutant at google dot com
Reporter: hjl.tools at gmail dot com
CC: ian at airs dot com
[hjl@gnu-6 gold]$ cat x.s
.text
.globl _start
_start:
movq %fs:0, %rax
addl $0x4c000000,%ebx
addl external_ie@GOTTPOFF(%rip), %eax
retq
.globl external_ie
.section .tdata,"awT",@progbits
.align 4
.type external_ie, @object
.size external_ie, 4
external_ie:
.long 100
[hjl@gnu-6 gold]$ make
cc -O2 -c x.s
./ld -o x x.o
objdump -dw x
x: file format elf64-x86-64
Disassembly of section .text:
00000000004000e8 <_start>:
4000e8: 64 48 8b 04 25 00 00 00 00 mov %fs:0x0,%rax
4000f1: 81 c3 00 00 00 4d add $0x4d000000,%ebx
4000f7: 8d 80 fc ff ff ff lea -0x4(%rax),%eax
4000fd: c3 retq
[hjl@gnu-6 gold]$
The second instruction is changed from
addl $0x4c000000,%ebx
to
add $0x4d000000,%ebx
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