https://sourceware.org/bugzilla/show_bug.cgi?id=22756
Bug ID: 22756
Summary: Linker relaxation miscalculates symbol addresses on
riscv
Product: binutils
Version: 2.30
Status: NEW
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: sch...@linux-m68k.org
Target Milestone: ---
Target: riscv64-*-*
The test program created by the copy_setup proc in
testsuite/binutils-all/objcopy.exp is broken by linker relaxation.
$ objdump -d tmpdir/testprog
tmpdir/testprog: file format elf64-littleriscv
Disassembly of section .plt:
0000000000000690 <.plt>:
690: 00002397 auipc t2,0x2
694: 41c30333 sub t1,t1,t3
698: 9883be03 ld t3,-1656(t2) # 2018 <__TMC_END__>
69c: fd430313 addi t1,t1,-44
6a0: 98838293 addi t0,t2,-1656
6a4: 00135313 srli t1,t1,0x1
6a8: 0082b283 ld t0,8(t0)
6ac: 000e0067 jr t3
00000000000006b0 <__libc_start_main@plt>:
6b0: 00002e17 auipc t3,0x2
6b4: 978e3e03 ld t3,-1672(t3) # 2028
<__libc_start_main@GLIBC_2.27>
6b8: 000e0367 jalr t1,t3
6bc: 00000013 nop
00000000000006c0 <abort@plt>:
6c0: 00002e17 auipc t3,0x2
6c4: 970e3e03 ld t3,-1680(t3) # 2030 <abort@GLIBC_2.27>
6c8: 000e0367 jalr t1,t3
6cc: 00000013 nop
00000000000006d0 <_exit@plt>:
6d0: 00002e17 auipc t3,0x2
6d4: 968e3e03 ld t3,-1688(t3) # 2038 <_exit@GLIBC_2.27>
6d8: 000e0367 jalr t1,t3
6dc: 00000013 nop
00000000000006e0 <strlen@plt>:
6e0: 00002e17 auipc t3,0x2
6e4: 960e3e03 ld t3,-1696(t3) # 2040 <strlen@GLIBC_2.27>
6e8: 000e0367 jalr t1,t3
6ec: 00000013 nop
00000000000006f0 <puts@plt>:
6f0: 00002e17 auipc t3,0x2
6f4: 958e3e03 ld t3,-1704(t3) # 2048 <puts@GLIBC_2.27>
6f8: 000e0367 jalr t1,t3
6fc: 00000013 nop
0000000000000700 <exit@plt>:
700: 00002e17 auipc t3,0x2
704: 950e3e03 ld t3,-1712(t3) # 2050 <exit@GLIBC_2.27>
708: 000e0367 jalr t1,t3
70c: 00000013 nop
0000000000000710 <write@plt>:
710: 00002e17 auipc t3,0x2
714: 948e3e03 ld t3,-1720(t3) # 2058 <write@GLIBC_2.27>
718: 000e0367 jalr t1,t3
71c: 00000013 nop
Disassembly of section .text:
0000000000000720 <_start>:
720: 02c000ef jal ra,74c <_start+0x2c>
724: 87aa mv a5,a0
726: 00002517 auipc a0,0x2
72a: 94a53503 ld a0,-1718(a0) # 2070
<__wrap_main@@Base+0x160e>
72e: 6582 ld a1,0(sp)
730: 0030 addi a2,sp,8
732: ff017113 andi sp,sp,-16
736: 00000697 auipc a3,0x0
73a: 35c68693 addi a3,a3,860 # a92 <__libc_csu_init>
73e: 00000717 auipc a4,0x0
742: 3ac70713 addi a4,a4,940 # aea <__libc_csu_fini>
746: 880a mv a6,sp
748: f69ff06f j 6b0 <__libc_start_main@plt>
74c: 00002197 auipc gp,0x2
750: 14418193 addi gp,gp,324 # 2890 <__global_pointer$>
754: 8082 ret
0000000000000756 <deregister_tm_clones>:
756: 00002517 auipc a0,0x2
75a: 8c250513 addi a0,a0,-1854 # 2018 <__TMC_END__>
75e: 00002797 auipc a5,0x2
762: 8ba78793 addi a5,a5,-1862 # 2018 <__TMC_END__>
766: 00a78963 beq a5,a0,778 <deregister_tm_clones+0x22>
76a: 00002317 auipc t1,0x2
76e: 8fe33303 ld t1,-1794(t1) # 2068
<_ITM_deregisterTMCloneTable>
772: 00030363 beqz t1,778 <deregister_tm_clones+0x22>
776: 8302 jr t1
778: 8082 ret
000000000000077a <register_tm_clones>:
77a: 00002517 auipc a0,0x2
77e: 89e50513 addi a0,a0,-1890 # 2018 <__TMC_END__>
782: 00002597 auipc a1,0x2
786: 89658593 addi a1,a1,-1898 # 2018 <__TMC_END__>
78a: 8d89 sub a1,a1,a0
78c: 858d srai a1,a1,0x3
78e: 03f5d793 srli a5,a1,0x3f
792: 95be add a1,a1,a5
794: 8585 srai a1,a1,0x1
796: c981 beqz a1,7a6 <register_tm_clones+0x2c>
798: 00002317 auipc t1,0x2
79c: 8f033303 ld t1,-1808(t1) # 2088
<_ITM_registerTMCloneTable>
7a0: 00030363 beqz t1,7a6 <register_tm_clones+0x2c>
7a4: 8302 jr t1
7a6: 8082 ret
00000000000007a8 <__do_global_dtors_aux>:
7a8: 00002797 auipc a5,0x2
7ac: 8e87c783 lbu a5,-1816(a5) # 2090 <_edata>
7b0: eb85 bnez a5,7e0 <__do_global_dtors_aux+0x38>
7b2: 1141 addi sp,sp,-16
7b4: e406 sd ra,8(sp)
7b6: 00002797 auipc a5,0x2
7ba: 8ca7b783 ld a5,-1846(a5) # 2080
<__cxa_finalize@GLIBC_2.27>
7be: c799 beqz a5,7cc <__do_global_dtors_aux+0x24>
7c0: 00002717 auipc a4,0x2
7c4: 84070713 addi a4,a4,-1984 # 2000 <__data_start>
7c8: 6308 ld a0,0(a4)
7ca: 9782 jalr a5
7cc: f8bff0ef jal ra,756 <deregister_tm_clones>
7d0: 60a2 ld ra,8(sp)
7d2: 4785 li a5,1
7d4: 00002717 auipc a4,0x2
7d8: 8af70e23 sb a5,-1860(a4) # 2090 <_edata>
7dc: 0141 addi sp,sp,16
7de: 8082 ret
7e0: 8082 ret
00000000000007e2 <frame_dummy>:
7e2: f99ff06f j 77a <register_tm_clones>
00000000000007e6 <fn>:
7e6: 1141 addi sp,sp,-16
7e8: e422 sd s0,8(sp)
7ea: 0800 addi s0,sp,16
7ec: 478d li a5,3
7ee: 853e mv a0,a5
7f0: 6422 ld s0,8(sp)
7f2: 0141 addi sp,sp,16
7f4: 8082 ret
00000000000007f6 <main>:
7f6: 1141 addi sp,sp,-16
7f8: e406 sd ra,8(sp)
7fa: e022 sd s0,0(sp)
7fc: 0800 addi s0,sp,16
7fe: 00002797 auipc a5,0x2
802: 87a7b783 ld a5,-1926(a5) # 2078 <common@@Base-0x20>
806: 439c lw a5,0(a5)
808: e39d bnez a5,82e <main+0x38>
80a: 00001797 auipc a5,0x1
80e: 7fe78793 addi a5,a5,2046 # 2008 <global>
812: 439c lw a5,0(a5)
814: 873e mv a4,a5
816: 4785 li a5,1
818: 00f71b63 bne a4,a5,82e <main+0x38>
81c: 00001797 auipc a5,0x1
820: 7f078793 addi a5,a5,2032 # 200c <local>
824: 439c lw a5,0(a5)
826: 873e mv a4,a5
828: 4789 li a5,2
82a: 00f70a63 beq a4,a5,83e <main+0x48>
82e: 00000517 auipc a0,0x0
832: 2d250513 addi a0,a0,722 # b00 <string+0x8>
836: ebbff0ef jal ra,6f0 <puts@plt>
83a: 4785 li a5,1
83c: a801 j 84c <main+0x56>
83e: 00000517 auipc a0,0x0
842: 2ca50513 addi a0,a0,714 # b08 <string+0x10>
846: eabff0ef jal ra,6f0 <puts@plt>
84a: 4781 li a5,0
84c: 853e mv a0,a5
84e: 60a2 ld ra,8(sp)
850: 6402 ld s0,0(sp)
852: 0141 addi sp,sp,16
854: 8082 ret
0000000000000856 <write_int>:
856: 7179 addi sp,sp,-48
858: f406 sd ra,40(sp)
85a: f022 sd s0,32(sp)
85c: 1800 addi s0,sp,48
85e: 87aa mv a5,a0
860: fcb43823 sd a1,-48(s0)
864: fcf42e23 sw a5,-36(s0)
868: fdc42783 lw a5,-36(s0)
86c: 2781 sext.w a5,a5
86e: 0207d263 bgez a5,892 <write_int+0x3c>
872: fd043783 ld a5,-48(s0)
876: 00178713 addi a4,a5,1
87a: fce43823 sd a4,-48(s0)
87e: 02d00713 li a4,45
882: 00e78023 sb a4,0(a5)
886: fdc42783 lw a5,-36(s0)
88a: 40f007bb negw a5,a5
88e: fcf42e23 sw a5,-36(s0)
892: fdc42783 lw a5,-36(s0)
896: 0007871b sext.w a4,a5
89a: 47a5 li a5,9
89c: 00e7df63 ble a4,a5,8ba <write_int+0x64>
8a0: fdc42703 lw a4,-36(s0)
8a4: 47a9 li a5,10
8a6: 02f747bb divw a5,a4,a5
8aa: 2781 sext.w a5,a5
8ac: fd043583 ld a1,-48(s0)
8b0: 853e mv a0,a5
8b2: fa5ff0ef jal ra,856 <write_int>
8b6: fca43823 sd a0,-48(s0)
8ba: fdc42703 lw a4,-36(s0)
8be: 47a9 li a5,10
8c0: 02f767bb remw a5,a4,a5
8c4: 2781 sext.w a5,a5
8c6: 0ff7f793 andi a5,a5,255
8ca: 0307879b addiw a5,a5,48
8ce: fef407a3 sb a5,-17(s0)
8d2: fd043783 ld a5,-48(s0)
8d6: 00178713 addi a4,a5,1
8da: fce43823 sd a4,-48(s0)
8de: fef44703 lbu a4,-17(s0)
8e2: 00e78023 sb a4,0(a5)
8e6: fd043783 ld a5,-48(s0)
8ea: 853e mv a0,a5
8ec: 70a2 ld ra,40(sp)
8ee: 7402 ld s0,32(sp)
00000000000008f0 <__wrap_exit>:
8f0: 6145 addi sp,sp,48
8f2: 8082 ret
8f4: 715d addi sp,sp,-80
8f6: e486 sd ra,72(sp)
8f8: e0a2 sd s0,64(sp)
8fa: 0880 addi s0,sp,80
8fc: 87aa mv a5,a0
8fe: faf42e23 sw a5,-68(s0)
902: fc840793 addi a5,s0,-56
906: 00000717 auipc a4,0x0
90a: 20a70713 addi a4,a4,522 # b10 <string+0x18>
90e: 6314 ld a3,0(a4)
910: e394 sd a3,0(a5)
912: 6718 ld a4,8(a4)
914: e798 sd a4,8(a5)
916: fc840793 addi a5,s0,-56
91a: 853e mv a0,a5
91c: dc5ff0ef jal ra,6e0 <strlen@plt>
920: 872a mv a4,a0
922: fc840793 addi a5,s0,-56
926: 973e add a4,a4,a5
928: fbc42783 lw a5,-68(s0)
92c: 85ba mv a1,a4
92e: 853e mv a0,a5
930: f27ff0ef jal ra,856 <write_int>
934: fea43423 sd a0,-24(s0)
938: fe843783 ld a5,-24(s0)
93c: 00178713 addi a4,a5,1
940: fee43423 sd a4,-24(s0)
944: 4729 li a4,10
946: 00e78023 sb a4,0(a5)
94a: fc840793 addi a5,s0,-56
94e: fe843703 ld a4,-24(s0)
952: 40f707b3 sub a5,a4,a5
956: 873e mv a4,a5
958: fc840793 addi a5,s0,-56
95c: 863a mv a2,a4
95e: 85be mv a1,a5
960: 4505 li a0,1
962: dafff0ef jal ra,710 <write@plt>
966: 00001797 auipc a5,0x1
96a: 72e78793 addi a5,a5,1838 # 2094 <done_exit_message>
96e: 4705 li a4,1
970: c398 sw a4,0(a5)
972: fbc42783 lw a5,-68(s0)
976: 853e mv a0,a5
978: d89ff0ef jal ra,700 <exit@plt>
97c: 0001 nop
97e: 00001797 auipc a5,0x1
982: 69278793 addi a5,a5,1682 # 2010 <___constval>
986: 439c lw a5,0(a5)
988: fbfd bnez a5,97e <__wrap_exit+0x8e>
98a: 0001 nop
98c: 60a6 ld ra,72(sp)
98e: 6406 ld s0,64(sp)
990: 6161 addi sp,sp,80
992: 8082 ret
0000000000000994 <__wrap__exit>:
994: 715d addi sp,sp,-80
996: e486 sd ra,72(sp)
998: e0a2 sd s0,64(sp)
99a: 0880 addi s0,sp,80
99c: 87aa mv a5,a0
99e: faf42e23 sw a5,-68(s0)
9a2: 00001797 auipc a5,0x1
9a6: 6f278793 addi a5,a5,1778 # 2094 <done_exit_message>
9aa: 439c lw a5,0(a5)
9ac: e3bd bnez a5,a12 <__wrap__exit+0x7e>
9ae: fc840793 addi a5,s0,-56
9b2: 00000717 auipc a4,0x0
9b6: 15e70713 addi a4,a4,350 # b10 <string+0x18>
9ba: 6314 ld a3,0(a4)
9bc: e394 sd a3,0(a5)
9be: 6718 ld a4,8(a4)
9c0: e798 sd a4,8(a5)
9c2: fc840793 addi a5,s0,-56
9c6: 853e mv a0,a5
9c8: d19ff0ef jal ra,6e0 <strlen@plt>
9cc: 872a mv a4,a0
9ce: fc840793 addi a5,s0,-56
9d2: 973e add a4,a4,a5
9d4: fbc42783 lw a5,-68(s0)
9d8: 85ba mv a1,a4
9da: 853e mv a0,a5
9dc: e7bff0ef jal ra,856 <write_int>
9e0: fea43423 sd a0,-24(s0)
9e4: fe843783 ld a5,-24(s0)
9e8: 00178713 addi a4,a5,1
9ec: fee43423 sd a4,-24(s0)
9f0: 4729 li a4,10
9f2: 00e78023 sb a4,0(a5)
9f6: fc840793 addi a5,s0,-56
9fa: fe843703 ld a4,-24(s0)
9fe: 40f707b3 sub a5,a4,a5
a02: 873e mv a4,a5
a04: fc840793 addi a5,s0,-56
a08: 863a mv a2,a4
a0a: 85be mv a1,a5
a0c: 4505 li a0,1
a0e: d03ff0ef jal ra,710 <write@plt>
a12: fbc42783 lw a5,-68(s0)
a16: 853e mv a0,a5
0000000000000a18 <__wrap_abort>:
a18: cb9ff0ef jal ra,6d0 <_exit@plt>
a1c: 0001 nop
a1e: 00001797 auipc a5,0x1
a22: 5f278793 addi a5,a5,1522 # 2010 <___constval>
a26: 439c lw a5,0(a5)
a28: fbfd bnez a5,a1e <__wrap_abort+0x6>
a2a: 0001 nop
a2c: 60a6 ld ra,72(sp)
a2e: 6406 ld s0,64(sp)
a30: 6161 addi sp,sp,80
a32: 8082 ret
a34: 1141 addi sp,sp,-16
a36: e406 sd ra,8(sp)
a38: e022 sd s0,0(sp)
a3a: 0800 addi s0,sp,16
a3c: 4651 li a2,20
a3e: 00000597 auipc a1,0x0
a42: 0e258593 addi a1,a1,226 # b20 <string+0x28>
a46: 4505 li a0,1
a48: cc9ff0ef jal ra,710 <write@plt>
a4c: c75ff0ef jal ra,6c0 <abort@plt>
a50: 0001 nop
a52: 00001797 auipc a5,0x1
a56: 5be78793 addi a5,a5,1470 # 2010 <___constval>
a5a: 439c lw a5,0(a5)
a5c: fbfd bnez a5,a52 <__wrap_abort+0x3a>
a5e: fbbff0ef jal ra,a18 <__wrap_abort>
0000000000000a62 <__wrap_main>:
a62: 7179 addi sp,sp,-48
a64: f406 sd ra,40(sp)
a66: f022 sd s0,32(sp)
a68: 1800 addi s0,sp,48
a6a: 87aa mv a5,a0
a6c: feb43023 sd a1,-32(s0)
a70: fcc43c23 sd a2,-40(s0)
a74: fef42623 sw a5,-20(s0)
a78: fec42783 lw a5,-20(s0)
a7c: fd843603 ld a2,-40(s0)
a80: fe043583 ld a1,-32(s0)
a84: 853e mv a0,a5
a86: d71ff0ef jal ra,7f6 <main>
a8a: 87aa mv a5,a0
a8c: 853e mv a0,a5
a8e: e63ff0ef jal ra,8f0 <__wrap_exit>
0000000000000a92 <__libc_csu_init>:
a92: 7139 addi sp,sp,-64
a94: f822 sd s0,48(sp)
a96: f04a sd s2,32(sp)
a98: 00001417 auipc s0,0x1
a9c: 36840413 addi s0,s0,872 # 1e00
<__frame_dummy_init_array_entry>
aa0: 00001917 auipc s2,0x1
aa4: 36890913 addi s2,s2,872 # 1e08 <__init_array_end>
aa8: 40890933 sub s2,s2,s0
aac: fc06 sd ra,56(sp)
aae: f426 sd s1,40(sp)
ab0: ec4e sd s3,24(sp)
ab2: e852 sd s4,16(sp)
ab4: e456 sd s5,8(sp)
ab6: 40395913 srai s2,s2,0x3
aba: 00090f63 beqz s2,ad8 <__libc_csu_init+0x46>
abe: 8ab2 mv s5,a2
ac0: 8a2e mv s4,a1
ac2: 89aa mv s3,a0
ac4: 4481 li s1,0
ac6: 601c ld a5,0(s0)
ac8: 8656 mv a2,s5
aca: 85d2 mv a1,s4
acc: 854e mv a0,s3
ace: 0485 addi s1,s1,1
ad0: 9782 jalr a5
ad2: 0421 addi s0,s0,8
ad4: fe9919e3 bne s2,s1,ac6 <__libc_csu_init+0x34>
ad8: 70e2 ld ra,56(sp)
ada: 7442 ld s0,48(sp)
adc: 74a2 ld s1,40(sp)
ade: 7902 ld s2,32(sp)
ae0: 69e2 ld s3,24(sp)
ae2: 6a42 ld s4,16(sp)
ae4: 6aa2 ld s5,8(sp)
ae6: 6121 addi sp,sp,64
ae8: 8082 ret
0000000000000aea <__libc_csu_fini>:
aea: 8082 ret
Note how both __wrap_exit and __warp_abort are pointing to the wrong addresses:
__wrap_exit should point to 0x8f4, and __wrap_abort should point to 0xa34.
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