From patchwork Tue May 24 15:14:30 2011
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Subject: [build] Fix Solaris 2/x86 GD/LD TLS code sequences with Sun ld
Date: Tue, 24 May 2011 05:14:30 -0000
From: Uros Bizjak <ubizjak@gmail.com>
X-Patchwork-Id: 97172
Message-Id: <BANLkTi=Y1fm9Lyj_Xox-EedHqqOg2xvc1A@mail.gmail.com>
To: Rainer Orth <ro@cebitec.uni-bielefeld.de>
Cc: gcc-patches@gcc.gnu.org

On Tue, May 24, 2011 at 5:09 PM, Rainer Orth
<ro@cebitec.uni-bielefeld.de> wrote:

>> Since handling of "p" is not conditional (that is, controlled by some
>> compile flag), it is IMO better to just output correct assembly from
>> the insn pattern itself.  You will also output lower-case "@plt" which
>
> I think I tried something along these lines, but failed with duplicate
> @plt@plt for PIC code.

Hm, there is no %P1 present, so I don't think this should be an issue.

>> is IIRC preferred by Sun assebler.
>
> I've never seen such an issue.

OK, it is your call... please change @plt to @PLT if desired.

>> Something like attached (untested) patch.
>
> Unfortunately, the Solaris 10/x86 bootstrap fails in the stage1 libgomp:
>
> /vol/gcc/src/hg/trunk/solaris/libgomp/single.c: In function 'GOMP_single_start':
> /vol/gcc/src/hg/trunk/solaris/libgomp/single.c:55:1: internal compiler error: ou
> tput_operand: '%&' used without any local dynamic TLS references

Yeah, I found the problem in tlsgdplt template, please find attached
new version of the patch...

Uros.


Index: i386.md
===================================================================
--- i386.md	(revision 174119)
+++ i386.md	(working copy)
@@ -12367,6 +12367,12 @@
 {
   output_asm_insn
     ("lea{l}\t{%a2@tlsgd(,%1,1), %0|%0, %a2@tlsgd[%1*1]}", operands);
+  if (TARGET_SUN_TLS)
+#ifdef HAVE_AS_IX86_TLSGDPLT
+    return "call\t%a2@tlsgdplt";
+#else
+    return "call\t%a3@plt";
+#endif
   return "call\t%P3";
 }
   [(set_attr "type" "multi")
@@ -12397,6 +12403,8 @@
     ("lea{q}\t{%a1@tlsgd(%%rip), %%rdi|rdi, %a1@tlsgd[rip]}", operands);
   fputs (ASM_SHORT "0x6666\n", asm_out_file);
   fputs ("\trex64\n", asm_out_file);
+  if (TARGET_SUN_TLS)
+    return "call\t%a2@plt";
   return "call\t%P2";
 }
   [(set_attr "type" "multi")
@@ -12424,6 +12432,12 @@
 {
   output_asm_insn
     ("lea{l}\t{%&@tlsldm(%1), %0|%0, %&@tlsldm[%1]}", operands);
+  if (TARGET_SUN_TLS)
+#ifdef HAVE_AS_IX86_TLSLDMPLT
+    return "call\t%&@tlsldmplt";
+#else
+    return "call\t%a2@plt";
+#endif
   return "call\t%P2";
 }
   [(set_attr "type" "multi")
@@ -12450,6 +12464,8 @@
 {
   output_asm_insn
     ("lea{q}\t{%&@tlsld(%%rip), %%rdi|rdi, %&@tlsld[rip]}", operands);
+  if (TARGET_SUN_TLS)
+    return "call\t%a1@plt";
   return "call\t%P1";
 }
   [(set_attr "type" "multi")