[Bug ld/12608] TLS relocations issues on alpha

[baryluk at smp dot if.uj.edu.pl]

http://sourceware.org/bugzilla/show_bug.cgi?id=12608

--- Comment #4 from Witold Baryluk <baryluk at smp dot if.uj.edu.pl> 2011-03-31 
00:32:44 UTC ---
Additionally, .o files are only differing in this places

$ cmp --verbose source-ev{4,5}.o
  871  35 175
  872  42 247
  875 175  35
  876 247  42
 8409  44  50
 8433  50  44
$

This actually do not exactly much my understaning relating object code and this
numers (they do not much when doing, hex<->dec, but I will blame cmp reporting
in strange way). Here is the same file piped thru hd, and then compared.


address@hidden:~/tls-relocation-bug$ diff -Nu source-ev4.o.hd  source-ev5.o.hd
--- source-ev4.o.hd    2011-03-31 01:37:45.000000000 +0200
+++ source-ev5.o.hd    2011-03-31 01:37:49.000000000 +0200
@@ -52,7 +52,7 @@
 00000330  2d 00 20 e4 00 00 3d a4  0d 00 5f 20 22 37 44 48  |-. ...=..._ "7DH|
 00000340  01 04 20 40 19 00 42 20  00 00 61 a4 23 36 7e 48  |.. @..B ..a.#6~H|
 00000350  a2 05 62 40 24 00 40 e4  08 00 21 a4 a1 75 23 40  
|address@hidden@...!..u#@|
-00000360  21 00 20 e4 00 00 1d 22  00 00 7d a7 00 40 5b 6b  |!. 
...."address@hidden|
+00000360  21 00 20 e4 00 00 7d a7  00 00 1d 22 00 40 5b 6b  |!. 
...}...."address@hidden|
 00000370  00 00 ba 27 00 00 00 24  11 00 3f 20 00 00 40 a4  |...'...$..? 
address@hidden|
 00000380  00 00 bd 23 21 17 24 48  22 36 5e 48 10 00 21 20  |...#!.$H"6^H..! |
 00000390  a1 05 41 40 14 00 20 e4  00 00 00 20 08 00 20 a4  |address@hidden 
.... .. .|
@@ -521,9 +521,9 @@
 000020a0  10 00 00 00 00 00 00 00  bc 02 00 00 00 00 00 00  |................|
 000020b0  25 00 00 00 18 00 00 00  00 00 00 00 00 00 00 00  |%...............|
 000020c0  f4 02 00 00 00 00 00 00  25 00 00 00 1a 00 00 00  |........%.......|
-000020d0  00 00 00 00 00 00 00 00  24 03 00 00 00 00 00 00  |........$.......|
+000020d0  00 00 00 00 00 00 00 00  28 03 00 00 00 00 00 00  |........(.......|
 000020e0  1e 00 00 00 07 00 00 00  00 00 00 00 00 00 00 00  |................|
-000020f0  28 03 00 00 00 00 00 00  04 00 00 00 13 00 00 00  |(...............|
+000020f0  24 03 00 00 00 00 00 00  04 00 00 00 13 00 00 00  |$...............|
 00002100  00 00 00 00 00 00 00 00  2c 03 00 00 00 00 00 00  |........,.......|
 00002110  05 00 00 00 01 00 00 00  05 00 00 00 00 00 00 00  |................|
 00002120  2c 03 00 00 00 00 00 00  08 00 00 00 13 00 00 00  |,...............|

PS. Ah, sorry, cmp --verbose, output in base-8. Now it matches.

This is what I got in resulting .so file in my case (remember binutils 2.18),

$ hd tst-tlsmod7-z-ev4.so | grep '75 23' -A 2
00000ec0  a2 05 62 40 24 00 40 e4  08 00 21 a4 a1 75 23 40  
|address@hidden@...!..u#@|
00000ed0  21 00 20 e4 58 80 1d a6  00 00 fe 2f 9e 00 00 00  |!. .X....../....|
00000ee0  00 04 00 42 00 00 00 24  11 00 3f 20 58 00 40 a4  |...B...$..? 
address@hidden|

After locating it in objdump -d, I have this

 ebc:   23 36 7e 48     zapnot  t2,0xf1,t2
 ec0:   a2 05 62 40     cmpeq   t2,t1,t1
 ec4:   24 00 40 e4     beq     t1,f58 <check1+0x178>
 ec8:   08 00 21 a4     ldq     t0,8(t0)
 ecc:   a1 75 23 40     cmpeq   t0,0x1b,t0
 ed0:   21 00 20 e4     beq     t0,f58 <check1+0x178>
 ed4:   58 80 1d a6     ldq     a0,-32680(gp)
 ed8:   00 00 fe 2f     unop    
 edc:   9e 00 00 00     rduniq
 ee0:   00 04 00 42     addq    a0,v0,v0
 ee4:   00 00 00 24     ldah    v0,0(v0)

for both ev4 and ev5 .so. This matches a result of Aurelien's ev4.so

I will try bissecting problem.

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