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Problems with symbol versioning on MIPS/ELF


Hi,

 I am getting following errors from ld:

mipsel-linux-as  -o symver.o symver.s
mipsel-linux-ld  -shared --version-script=symver.map -o symver.so symver.o
mipsel-linux-ld: bfd assertion fail elf32-mips.c:5281
mipsel-linux-ld: bfd assertion fail elf32-mips.c:5155
mipsel-linux-ld: bfd assertion fail elf32-mips.c:5158
symver.o: In function `sym1':
symver.o(.text+0x4): relocation truncated to fit: R_MIPS_GOT16 _DYNAMIC
mipsel-linux-ld: bfd assertion fail elf32-mips.c:8169
mipsel-linux-ld: bfd assertion fail elf32-mips.c:8169
mipsel-linux-ld: bfd assertion fail elf32-mips.c:8169
mipsel-linux-ld: bfd assertion fail elf32-mips.c:8169
mipsel-linux-ld: bfd assertion fail elf32-mips.c:8169
mipsel-linux-ld: bfd assertion fail elf32-mips.c:8169
mipsel-linux-ld: bfd assertion fail elf32-mips.c:8169
mipsel-linux-ld: bfd assertion fail elf32-mips.c:8169
mipsel-linux-ld: bfd assertion fail elf32-mips.c:8169
mipsel-linux-ld: bfd assertion fail elf32-mips.c:8169
mipsel-linux-ld: bfd assertion fail elf32-mips.c:8169
mipsel-linux-ld: bfd assertion fail elf32-mips.c:8169
mipsel-linux-ld: bfd assertion fail elf32-mips.c:8169
make: *** [symver.so] Error 1


symvers.s:

	.abicalls
	.text
	.set	noreorder

	.globl	sym1
	.type	sym1,@function
	.cprestore 16
sym1:
	la	$5,_DYNAMIC
	jal	sym2
	nop


symver.map:

VER_1.0 {
	global:
		sym1;
	local:
		*;
};


 Also if the jal opcode is absent from the above code, ld segfaults:

Program received signal SIGSEGV, Segmentation fault.
0x807fb96 in mips_elf_global_got_index (abfd=0x810e9a8, h=0x8109a70)
    at elf32-mips.c:5155
5155      BFD_ASSERT (h->dynindx >= g->global_gotsym->dynindx);
(gdb) print g->global_gotsym
$14 = (struct elf_link_hash_entry *) 0x0


 It looks like not all BFD structures get updated properly for symbols
that get forced to be local by a version script.  I tried to track the
problem down and created a following patch that fullfills the first
assertion.

diff -u --recursive --new-file --exclude-from=.exclude binutils.macro/bfd/elflink.h binutils/bfd/elflink.h
--- binutils.macro/bfd/elflink.h	Fri Oct  8 16:41:22 1999
+++ binutils/bfd/elflink.h	Mon Oct 11 22:45:11 1999
@@ -3597,6 +3597,7 @@
 			      h->elf_link_hash_flags &=~
 				ELF_LINK_HASH_NEEDS_PLT;
 			      h->dynindx = -1;
+			      --elf_hash_table (info)->dynsymcount;
 			      h->plt.offset = (bfd_vma) -1;
 			      /* FIXME: The name of the symbol has
 				 already been recorded in the dynamic
@@ -3711,6 +3712,7 @@
 			  h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL;
 			  h->elf_link_hash_flags &=~ ELF_LINK_HASH_NEEDS_PLT;
 			  h->dynindx = -1;
+			  --elf_hash_table (info)->dynsymcount;
 			  h->plt.offset = (bfd_vma) -1;
 			  /* FIXME: The name of the symbol has already
 			     been recorded in the dynamic string table
@@ -3735,6 +3737,7 @@
 	      h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL;
 	      h->elf_link_hash_flags &=~ ELF_LINK_HASH_NEEDS_PLT;
 	      h->dynindx = -1;
+	      --elf_hash_table (info)->dynsymcount;
 	      h->plt.offset = (bfd_vma) -1;
 	      /* FIXME: The name of the symbol has already been
 		 recorded in the dynamic string table section.  */

Unfortunately I don't know how to make mips_elf_local_relocation_p()
return a valid result for relocations that refer to symbols forced to be
local.  Any help would be appreciated.

  Maciej

-- 
+  Maciej W. Rozycki, Technical University of Gdansk, Poland   +
+--------------------------------------------------------------+
+        e-mail: macro@ds2.pg.gda.pl, PGP key available        +


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