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- With the addition of TLS support binutils started to make the addend

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values for resolved symbols relative to relocbase instead of sections
  so detect this case and handle as appropriate, which allows using
  kernel modules linked with affected versions of binutils. Actually I
  think this is a bug in binutils but given that apparently nobody
  complained for nearly six years and powerpc has basically the same
  workaround I decided to put it in for the sparc64 kernel, too.
- Fix R_SPARC_HIX22 relocations. Apparently these are hardly ever used.
This commit is contained in:
Marius Strobl 2011-03-06 15:20:11 +00:00
parent d374d11285
commit 25b31a9496
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=219340
2 changed files with 14 additions and 1 deletions
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3
libexec/rtld-elf/sparc64/reloc.c
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@ -355,6 +355,9 @@ reloc_nonplt_object(Obj_Entry *obj, const Elf_Rela *rela, SymCache *cache,
if (type == R_SPARC_OLO10)
value = (value & 0x3ff) + ELF64_R_TYPE_DATA(rela->r_info);
if (type == R_SPARC_HIX22)
value ^= 0xffffffffffffffff;
if (RELOC_PC_RELATIVE(type))
value -= (Elf_Addr)where;

12
sys/sparc64/sparc64/elf_machdep.c
View File

@ -332,7 +332,14 @@ elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type,
addr = lookup(lf, symidx, 1);
if (addr == 0)
return (-1);
value += addr;
/*
* With the addition of TLS support binutils started to make
* addend values relative to relocbase instead of sections.
*/
if (addr > relocbase && addr <= relocbase + value)
value += relocbase;
else
value += addr;
if (RELOC_BARE_SYMBOL(rtype))
value = elf_relocaddr(lf, value);
}
@ -340,6 +347,9 @@ elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type,
if (rtype == R_SPARC_OLO10)
value = (value & 0x3ff) + ELF64_R_TYPE_DATA(rela->r_info);
if (rtype == R_SPARC_HIX22)
value ^= 0xffffffffffffffff;
if (RELOC_PC_RELATIVE(rtype))
value -= (Elf_Addr)where;