diff options
Diffstat (limited to 'elf/tst-tls1.c')
-rw-r--r-- | elf/tst-tls1.c | 81 |
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 +} |