Bug 558576 - More relocation type for RISC-V need to support
Summary: More relocation type for RISC-V need to support
Status: RESOLVED FIXED
Alias: None
Product: TCF
Classification: Tools
Component: Agent (show other bugs)
Version: unspecified   Edit
Hardware: PC All
: P3 major (vote)
Target Milestone: 1.7   Edit
Assignee: Project Inbox CLA
QA Contact: Eugene Tarassov CLA
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2019-12-22 20:38 EST by wenyan xin CLA
Modified: 2021-06-25 16:23 EDT (History)
0 users

See Also:

Attachments
the binary file generated by ccriscv. (12.09 KB, application/octet-stream)
2019-12-22 20:38 EST, wenyan xin CLA 		no flags Details
a c language sample (49 bytes, application/octet-stream)
2019-12-22 20:40 EST, wenyan xin CLA 		no flags Details
View All Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description wenyan xin CLA 2019-12-22 20:38:52 EST 
Created attachment 281308 [details]
the binary file generated by ccriscv.

The attached file dkm.c is a c language sample for RISC-V.

And the other attached file r64_dkm.out is generated from ccriscv (the c language compile in gnu-8.3.0.1 for riscv).

When we loaded to run the r64_dkm.out file, TCF raised a exception about "Unsupported relocation type".

We checked and found the exception is generated from at line 56 in dwarfreloc-mdep.h file. It seems both R_RISCV_ADD64 and R_RISCV_SUB64  types does not support by TCF now.

--------------------------------------
readelfriscv -r r64_dkm.out

Relocation section '.rela.debug_info' at offset 0x1ec0 contains 60 entries:
  Offset          Info           Type           Sym. Value    Sym. Name + Addend
000000000019  001b00000002 R_RISCV_64        0000000000000000 .Ltext0 + 0
000000000021  001c00000024 R_RISCV_ADD64     0000000000000084 .Letext0 + 0
000000000021  001b00000028 R_RISCV_SUB64     0000000000000000 .Ltext0 + 0
000000000029  001d00000001 R_RISCV_32        0000000000000000 .Ldebug_line0 + 0
00000000002e  001e00000001 R_RISCV_32        000000000000006e .LASF12 + 0
Comment 1 wenyan xin CLA 2019-12-22 20:40:05 EST 
Created attachment 281309 [details]
a c language sample
Comment 2 Eugene Tarassov CLA 2019-12-23 22:54:03 EST 
Fixed.
Thanks!