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tst-tlsopt-powerpc as a shared lib
This makes the __tls_get_addr_opt test run as a shared library, and so actually test that DTPMOD64/DTPREL64 pairs are processed by ld.so to support the __tls_get_adfr_opt call stub fast return. After a 2017-01-24 patch (binutils f0158f4416) ld.bfd no longer emitted unnecessary dynamic relocations against local thread variables, instead setting up the __tls_index GOT entries for the call stub fast return. This meant tst-tlsopt-powerpc passed but did not check ld.so relocation support. After a 2017-07-16 patch (binutils 676ee2b5fa) ld.bfd no longer set up the __tls_index GOT entries for the call stub fast return, and tst-tlsopt-powerpc failed. Compiling mod-tlsopt-powerpc.c with -DSHARED exposed a bug in powerpc64/tls-macros.h, which defines a __TLS_GET_ADDR macro that clashes with one defined in dl-tls.h. The tls-macros.h version is only used in that file, so delete it and expand. * sysdeps/powerpc/mod-tlsopt-powerpc.c: Extract from tst-tlsopt-powerpc.c with function name change and no test harness. * sysdeps/powerpc/tst-tlsopt-powerpc.c: Remove body of test. Call tls_get_addr_opt_test. * sysdeps/powerpc/Makefile (LDFLAGS-tst-tlsopt-powerpc): Don't define. (modules-names): Add mod-tlsopt-powerpc. (mod-tlsopt-powerpc.so-no-z-defs): Define. (tst-tlsopt-powerpc): Depend on .so. * sysdeps/powerpc/powerpc64/tls-macros.h (__TLS_GET_ADDR): Don't define. Expand use in TLS_GD and TLS_LD.
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ChangeLog
13
ChangeLog
@ -1,3 +1,16 @@
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2017-08-03 Alan Modra <amodra@gmail.com>
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* sysdeps/powerpc/mod-tlsopt-powerpc.c: Extract from
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tst-tlsopt-powerpc.c with function name change and no test harness.
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* sysdeps/powerpc/tst-tlsopt-powerpc.c: Remove body of test.
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Call tls_get_addr_opt_test.
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* sysdeps/powerpc/Makefile (LDFLAGS-tst-tlsopt-powerpc): Don't define.
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(modules-names): Add mod-tlsopt-powerpc.
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(mod-tlsopt-powerpc.so-no-z-defs): Define.
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(tst-tlsopt-powerpc): Depend on .so.
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* sysdeps/powerpc/powerpc64/tls-macros.h (__TLS_GET_ADDR): Don't
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define. Expand use in TLS_GD and TLS_LD.
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2017-08-02 Samuel Thibault <samuel.thibault@ens-lyon.org>
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* sysdeps/mach/hurd/enbl-secure.c (__libc_init_secure): Define
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@ -8,9 +8,11 @@ sysdep-dl-routines += dl-machine hwcapinfo
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sysdep_routines += dl-machine hwcapinfo
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# extra shared linker files to link only into dl-allobjs.so
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sysdep-rtld-routines += dl-machine hwcapinfo
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# Don't optimize GD tls sequence to LE.
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LDFLAGS-tst-tlsopt-powerpc += -Wl,--no-tls-optimize
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modules-names += mod-tlsopt-powerpc
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mod-tlsopt-powerpc.so-no-z-defs = yes
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tests += tst-tlsopt-powerpc
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$(objpfx)tst-tlsopt-powerpc: $(objpfx)mod-tlsopt-powerpc.so
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ifneq (no,$(multi-arch))
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tests-static += tst-tlsifunc-static
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49
sysdeps/powerpc/mod-tlsopt-powerpc.c
Normal file
49
sysdeps/powerpc/mod-tlsopt-powerpc.c
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@ -0,0 +1,49 @@
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/* shared library to test for __tls_get_addr optimization. */
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#include <stdio.h>
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#include "../../elf/tls-macros.h"
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#include "dl-tls.h"
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/* common 'int' variable in TLS. */
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COMMON_INT_DEF(foo);
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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 = TLS_GD (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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@ -18,13 +18,11 @@
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__result; \
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})
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#define __TLS_GET_ADDR "__tls_get_addr"
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/* PowerPC64 Local Dynamic TLS access. */
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#define TLS_LD(x) \
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({ int * __result; \
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asm ("addi 3,2," #x "@got@tlsld\n\t" \
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"bl " __TLS_GET_ADDR "\n\t" \
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"bl __tls_get_addr\n\t" \
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"nop \n\t" \
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"addis %0,3," #x "@dtprel@ha\n\t" \
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"addi %0,%0," #x "@dtprel@l" \
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@ -36,7 +34,7 @@
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#define TLS_GD(x) \
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({ register int *__result __asm__ ("r3"); \
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asm ("addi 3,2," #x "@got@tlsgd\n\t" \
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"bl " __TLS_GET_ADDR "\n\t" \
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"bl __tls_get_addr\n\t" \
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"nop " \
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: "=r" (__result) : \
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: __TLS_CALL_CLOBBERS); \
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@ -1,51 +1,11 @@
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/* glibc test for __tls_get_addr optimization. */
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#include <stdio.h>
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#include "../../elf/tls-macros.h"
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#include "dl-tls.h"
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/* common 'int' variable in TLS. */
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COMMON_INT_DEF(foo);
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static int
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do_test (void)
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{
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int result = 0;
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extern int tls_get_addr_opt_test (void);
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/* Get variable using general dynamic model. */
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int *ap = TLS_GD (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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return tls_get_addr_opt_test ();
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}
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#include <support/test-driver.c>
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