CVS commit: src/sys/kern

["Christos Zoulas" <christos%netbsd.org@localhost>]

Module Name:    src
Committed By:   christos
Date:           Wed Jun  9 15:15:35 UTC 2021

Modified Files:
        src/sys/kern: subr_kobj.c

Log Message:
Work around abs rela relocations issue (for now):

$ readelf -r compat_linux
...
Relocation section '.rela.data' at offset 0x37270 contains 537 entries:
Offset          Info           Type           Sym. Value    Sym. Name + Addend
...
000000000040  000000000001 R_X86_64_64                          0
000000000048  000000000001 R_X86_64_64                          0
...

$ objdump -r compat_linux
...
RELOCATION RECORDS FOR [.data]:
OFFSET           TYPE              VALUE
...
0000000000000040 R_X86_64_64       *ABS*
0000000000000048 R_X86_64_64       *ABS*
...

Since those have symidx == 0, and the 0 symbol table entry is special,
treat them as SHN_ABS.

Change ENOENT -> ENOEXEC to avoid confusion (like other linking errors),
and add some debugging when that happens.


To generate a diff of this commit:
cvs rdiff -u -r1.67 -r1.68 src/sys/kern/subr_kobj.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.