[Bug ld/24673] New: [RISCV] -fPIC -pie and -fPIC -no-pie create unexpected R_RISCV_NONE R_RISCV_DTPMOD64 relocations

[maskray at google dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=24673

            Bug ID: 24673
           Summary: [RISCV] -fPIC -pie and -fPIC -no-pie create unexpected
                    R_RISCV_NONE R_RISCV_DTPMOD64 relocations
           Product: binutils
           Version: 2.33 (HEAD)
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: maskray at google dot com
  Target Milestone: ---

static __thread int a;
int foo() {return a;}
int main() {}

riscv-gcc -fuse-ld=bfd -fPIC -no-pie d.c -o d
readelf -r d

Relocation section '.rela.dyn' at offset 0x378 contains 1 entry:
    Offset             Info             Type               Symbol's Value 
Symbol's Name + Addend
0000000000000000  0000000000000000 R_RISCV_NONE                              0

riscv-gcc -fuse-ld=bfd -fPIC -pie d.c -o d
readelf -r d

Relocation section '.rela.dyn' at offset 0x458 contains 9 entries:
...
0000000000001978  0000000000000007 R_RISCV_TLS_DTPMOD64                      0


There is no correctness issue.
1) In both cases, the DTPREL GOT slot is correctly pre-populated.
2) In the -fPIC -no-pie case, the DTPMOD GOT slot is pre-populated as 1.

But the dynamic relocations are unexpected and made me wonder if there is a bug
:)

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