This is the mail archive of the
binutils@sourceware.org
mailing list for the binutils project.
[gold] 2.27 generates GOT where 2.26 did not
- From: Jethro Beekman <binutils at jbeekman dot nl>
- To: binutils at sourceware dot org
- Date: Thu, 11 Aug 2016 17:31:15 -0700
- Subject: [gold] 2.27 generates GOT where 2.26 did not
- Authentication-results: sourceware.org; auth=none
I have these two files:
// asm_var.S
.section .rodata
.global asm_var
.protected asm_var
.size asm_var, 8
asm_var:
.org .+8
// get_addr.c
extern unsigned long asm_var;
void* get_addr() {
return &asm_var;
}
That I compile with:
gcc -O3 -fuse-ld=gold -fPIC -shared -nostdlib -Wl,-Bsymbolic asm_var.S get_addr.c
With gold 2.26.1 (and most likely older versions as well), this results in:
00000000000002f0 <get_addr>:
2f0: 48 8d 05 01 00 00 00 lea 0x1(%rip),%rax # 2f8 <asm_var>
2f7: c3 retq
Yet with 2.27 this results in:
0000000000000340 <get_addr>:
340: 48 8b 05 99 1c 00 00 mov 0x1c99(%rip),%rax # 1fe0 <_DYNAMIC+0x110>
347: c3 retq
What's at 1fe0?
000000001fe0 000500000006 R_X86_64_GLOB_DAT 0000000000000348 asm_var + 0
Is this a regression in 2.27? I really don't want to use the GOT. Is there a
flag I can pass to get the old behavior?
Jethro Beekman