https://sourceware.org/bugzilla/show_bug.cgi?id=24881
Bug ID: 24881
Summary: x86_64-linux-gnu-ld.bfd does not convert instructions
for GOTPCRELX if output format is binary
Product: binutils
Version: 2.32
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: kariya_mitsuru at hotmail dot com
Target Milestone: ---
Created attachment 11937
--> https://sourceware.org/bugzilla/attachment.cgi?id=11937&action=edit
Test case
If an operand of mov (or call) is a locally defined symbol with GOTPCRELX, then
x86_64-linux-gnu-ld.bfd converts it into immediate operand.
However, if output format is binary, x86_64-linux-gnu-ld.bfd does not convert
it.
================= m.s =================
.globl main
.type main, @function
main:
movq f@GOTPCREL(%rip), %rax
callq *f@GOTPCREL(%rip)
xorl %edi, %edi
movl $60, %eax
syscall
.size main, . - main
================= m.s =================
============= m.o(disasm) =============
0: 48 8b 05 00 00 00 00 mov 0x0(%rip),%rax # 7 <main+0x7>
3: R_X86_64_REX_GOTPCRELX f-0x4
7: ff 15 00 00 00 00 callq *0x0(%rip) # d <main+0xd>
9: R_X86_64_GOTPCRELX f-0x4
d: 31 ff xor %edi,%edi
f: b8 3c 00 00 00 mov $0x3c,%eax
14: 0f 05 syscall
============= m.o(disasm) =============
============ m.elf(disasm) ============
400000: 48 c7 c0 16 00 40 00 mov $0x400016,%rax
400007: 67 e8 09 00 00 00 addr32 callq 0x400016
40000d: 31 ff xor %edi,%edi
40000f: b8 3c 00 00 00 mov $0x3c,%eax
400014: 0f 05 syscall
============ m.elf(disasm) ============
============ m.bin(disasm) ============
400000: 48 8b 05 0f 00 00 00 mov 0xf(%rip),%rax # 0x400016
400007: ff 15 09 00 00 00 callq *0x9(%rip) # 0x400016
40000d: 31 ff xor %edi,%edi
40000f: b8 3c 00 00 00 mov $0x3c,%eax
400014: 0f 05 syscall
============ m.bin(disasm) ============
IMHO, the instructions should be converted even though output format is binary.
I think that PR22419(binary format generated by LD is incorrect) is same
problem for V850.
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