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33c50ef428
elf/tls-macros.h was added for TLS testing when GCC did not support __thread. __thread and tls_model attributes are mature now and have been used by many newer tests. Also delete tst-tls2.c which tests .tls_common (unused by modern GCC and unsupported by Clang/LLD). .tls_common and .tbss definition are almost identical after linking, so the runtime test doesn't add additional coverage. Assembler and linker tests should be on the binutils side. When LLD 13.0.0 is allowed in configure.ac (https://sourceware.org/pipermail/libc-alpha/2021-August/129866.html), `make check` result is on par with glibc built with GNU ld on aarch64 and x86_64. As a future clean-up, TLS_GD/TLS_LD/TLS_IE/TLS_IE macros can be removed from sysdeps/*/tls-macros.h. We can add optional -mtls-dialect={gnu2,trad} tests to ensure coverage. Tested on aarch64-linux-gnu, powerpc64le-linux-gnu, and x86_64-linux-gnu. Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
48 lines
1.1 KiB
C
48 lines
1.1 KiB
C
/* shared library to test for __tls_get_addr optimization. */
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#include <stdio.h>
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#include "dl-tls.h"
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__thread int foo __attribute__ ((tls_model("global-dynamic")));
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int
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tls_get_addr_opt_test (void)
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{
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int result = 0;
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/* Get variable using general dynamic model. */
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int *ap = &foo;
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if (*ap != 0)
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{
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printf ("foo = %d\n", *ap);
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result = 1;
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}
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tls_index *tls_arg;
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#ifdef __powerpc64__
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register unsigned long thread_pointer __asm__ ("r13");
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asm ("addi %0,2,foo@got@tlsgd" : "=r" (tls_arg));
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#else
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register unsigned long thread_pointer __asm__ ("r2");
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asm ("bcl 20,31,1f\n1:\t"
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"mflr %0\n\t"
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"addis %0,%0,_GLOBAL_OFFSET_TABLE_-1b@ha\n\t"
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"addi %0,%0,_GLOBAL_OFFSET_TABLE_-1b@l\n\t"
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"addi %0,%0,foo@got@tlsgd" : "=b" (tls_arg));
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#endif
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if (tls_arg->ti_module != 0)
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{
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printf ("tls_index not optimized, binutils too old?\n");
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result = 1;
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}
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else if (tls_arg->ti_offset + thread_pointer != (unsigned long) ap)
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{
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printf ("tls_index->ti_offset wrong value\n");
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result = 1;
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}
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return result;
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}
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