From b123d06e21fbd622806df67951942605d879971e Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@redhat.com>
Date: Sun, 10 Feb 2002 07:44:36 +0000
Subject: Update.

	* elf/Makefile (tests): Add tst-tls1.
	* elf/tst-tls1.c: New file.

	* sysdeps/generic/dl-tls.c (_dl_determine_tlsoffset): Don't handle
	alignment of TCB for now.

	* elf/rtld.c (dl_main): Use p_vaddr as address of TLS
	initialization image for the application itself.

	loop to initialize TLS block.
---
 elf/tst-tls1.c | 81 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 elf/tst-tls1.c

(limited to 'elf/tst-tls1.c')

diff --git a/elf/tst-tls1.c b/elf/tst-tls1.c
new file mode 100644
index 0000000000..4d0913890c
--- /dev/null
+++ b/elf/tst-tls1.c
@@ -0,0 +1,81 @@
+/* glibc test for TLS in ld.so.  */
+#include <stdio.h>
+
+#include <tls.h>
+
+
+/* XXX Until gcc gets told how to define and use thread-local
+   variables we will have to resort to use asms.  */
+//asm (".tls_common foo,4,4");
+asm (".section \".tdata\", \"awT\", @progbits\n\t"
+     ".align 4\n\t"
+     ".globl foo\n"
+     "foo:\t.long 0\n\t"
+     ".globl bar\n"
+     "bar:\t.long 0\n\t"
+     ".previous");
+
+
+int
+main (void)
+{
+#ifdef USE_TLS
+  int result = 0;
+  int a, b;
+
+  /* XXX Each architecture must have its own asm for now.  */
+# ifdef __i386__
+  /* Set the variable using the local exec model.  */
+  puts ("set bar to 1 (LE)");
+  asm ("movl %gs:0,%eax\n\t"
+     "subl $bar@tpoff,%eax\n\t"
+     "movl $1,(%eax)");
+
+#if 0
+  // XXX Doesn't work yet; no runtime relocations.
+  fputs ("get sum of foo and bar (IE)", stdout);
+  asm ("call 1f\n\t"
+       ".subsection 1\n"
+       "1:\tmovl (%%esp), %%ebx\n\t"
+       "ret\n\t"
+       ".previous\n\t"
+       "addl $_GLOBAL_OFFSET_TABLE_, %%ebx\n\t"
+       "movl %%gs:0,%%eax\n\t"
+       "movl %%eax,%%edx\n\t"
+       "addl foo@gottpoff(%%ebx),%%eax\n\t"
+       "addl bar@gottpoff(%%ebx),%%eax\n\t"
+       "movl (%%eax), %0\n\t"
+       "addl (%%edx), %0"
+       : "=a" (a), "=&b" (b));
+  printf (" = %d\n", a);
+  result |= a != 1;
+#endif
+
+  fputs ("get sum of foo and bar (GD)", stdout);
+  asm ("call 1f\n\t"
+       ".subsection 1\n"
+       "1:\tmovl (%%esp), %%ebx\n\t"
+       "ret\n\t"
+       ".previous\n\t"
+       "addl $_GLOBAL_OFFSET_TABLE_, %%ebx\n\t"
+       "leal foo@tlsgd(%%ebx),%%eax\n\t"
+       "call ___tls_get_addr@plt\n\t"
+       "nop\n\t"
+       "movl (%%eax), %%edx\n\t"
+       "leal bar@tlsgd(%%ebx),%%eax\n\t"
+       "call ___tls_get_addr@plt\n\t"
+       "nop\n\t"
+       "addl (%%eax), %%edx\n\t"
+       : "=&a" (a), "=d" (b));
+  printf (" = %d\n", b);
+  result |= b != 1;
+
+# else
+#  error "No support for this architecture so far."
+# endif
+
+  return result;
+#else
+  return 0;
+#endif
+}
-- 
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