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authorUlrich Drepper <drepper@redhat.com>2002-02-10 07:44:36 +0000
committerUlrich Drepper <drepper@redhat.com>2002-02-10 07:44:36 +0000
commitb123d06e21fbd622806df67951942605d879971e (patch)
tree2793b19baca280270087a29f9e3ebf97ec609c3d /elf/tst-tls1.c
parent3065b0c799c01456e8b7095b51bc5b50ffab251f (diff)
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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.
Diffstat (limited to 'elf/tst-tls1.c')
-rw-r--r--elf/tst-tls1.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/elf/tst-tls1.c b/elf/tst-tls1.c
new file mode 100644
index 0000000..4d09138
--- /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
+}