binutils-gdb/gold/testsuite/pr20308_main.c

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gold: Support 386 TLS code sequences without PLT There are extensions to 386 psABI: https://groups.google.com/forum/#!topic/ia32-abi/awsRSvJOJfs to call tls_get_addr via GOT: call *___tls_get_addr@GOT(%reg) where EBX register isn't required as GOT base. Since direct call is 4-byte long and indirect call, is 5-byte long, the extra one byte must be handled properly. For general dynamic model, 7-byte lea instruction before call instruction is replaced by 6-byte one to make room for indirect call. For local dynamic model, we simply use 5-byte indirect call. TLS linker optimization is updated to recognize new instruction patterns. For local dynamic model to local exec model transition, we generate a 6-byte lea instruction as nop, instead of a 1-byte nop plus a 4-byte lea instruction. PR gold/20308 * i386.cc (Target_i386::Relocate::relocate): Allow R_386_GOT32X relocation against ___tls_get_addr. (Target_i386::Relocate::tls_gd_to_ie): Support indirect call to __tls_get_addr. (Target_i386::Relocate::tls_gd_to_le): Likewise. (Target_i386::Relocate::tls_ld_to_le): Likewise. * testsuite/Makefile.am (check_PROGRAMS): Add pr20308a_test, pr20308b_test, pr20308c_test, pr20308d_test, pr20308e_test. (pr20308a_test_SOURCES): New. (pr20308a_test_DEPENDENCIES): Likewise. (pr20308a_test_CFLAGS): Likewise. (pr20308a_test_LDFLAGS): Likewise. (pr20308a_test_LDADD): Likewise. (pr20308b_test_SOURCES): Likewise. (pr20308b_test_DEPENDENCIES): Likewise. (pr20308b_test_CFLAGS): Likewise. (pr20308b_test_LDFLAGS): Likewise. (pr20308b_test_LDADD): Likewise. (pr20308c_test_SOURCES): Likewise. (pr20308c_test_DEPENDENCIES): Likewise. (pr20308c_test_CFLAGS): Likewise. (pr20308c_test_LDFLAGS): Likewise. (pr20308c_test_LDADD): Likewise. (pr20308d_test_SOURCES): Likewise. (pr20308d_test_DEPENDENCIES): Likewise. (pr20308d_test_CFLAGS): Likewise. (pr20308d_test_LDFLAGS): Likewise. (pr20308d_test_LDADD): Likewise. (pr20308e_test_SOURCES): Likewise. (pr20308e_test_DEPENDENCIES): Likewise. (pr20308e_test_CFLAGS): Likewise. (pr20308e_test_LDFLAGS): Likewise. (pr20308e_test_LDADD): Likewise. (pr20308a.so): Likewise. (pr20308b.so): Likewise. (pr20308_gd.o): Likewise. (pr20308_ld.o): Likewise. (MOSTLYCLEANFILES): Add pr20308a.so pr20308b.so. * testsuite/Makefile.in: Regenerated. * testsuite/pr20308_def.c: New file. * testsuite/pr20308_gd.S: Likewise. * testsuite/pr20308_ld.S: Likewise. * testsuite/pr20308_main.c: Likewise.
2016-06-29 23:38:43 +08:00
#include <stdio.h>
#include <stdlib.h>
extern int * get_gd (void);
extern void set_gd (int);
extern int test_gd (int);
extern int * get_ld (void);
extern void set_ld (int);
extern int test_ld (int);
int
main ()
{
int *p;
p = get_gd ();
set_gd (3);
if (*p != 3 || !test_gd (3))
abort ();
p = get_ld ();
set_ld (4);
if (*p != 4 || !test_ld (4))
abort ();
printf ("PASS\n");
return 0;
}