From 931fae8133c14bf6240ca3439cb6ba2af120ebfb Mon Sep 17 00:00:00 2001 From: Jerome Lambourg Date: Tue, 27 Jun 2017 09:15:55 +0000 Subject: [PATCH] vxworks.h (VXWORKS_LIB_SPEC): Incorporate ... 2017-06-27 Jerome Lambourg Olivier Hainque * config/vxworks.h (VXWORKS_LIB_SPEC): Incorporate ... (TLS_SYM): New local macro, forcing reference to __tls__ on link command lines for VxWorks 7 RTPs, triggering initialization of tlsLib. (VXWORKS_HAVE_TLS): New macro. State whether the target VxWorks OS features TLS support, true for RTPs on VxWorks 7. * config/vxworks.c (vxworks_override_options): Setup emutls accordingly. Co-Authored-By: Olivier Hainque From-SVN: r249684 --- gcc/ChangeLog | 12 ++++++++++++ gcc/config/vxworks.c | 32 ++++++++++++++++++-------------- gcc/config/vxworks.h | 9 +++++++++ 3 files changed, 39 insertions(+), 14 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 36773196eec..2da6160a0b5 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,15 @@ +2017-06-27 Jerome Lambourg + Olivier Hainque + + * config/vxworks.h (VXWORKS_LIB_SPEC): Incorporate ... + (TLS_SYM): New local macro, forcing reference to __tls__ on + link command lines for VxWorks 7 RTPs, triggering initialization + of tlsLib. + (VXWORKS_HAVE_TLS): New macro. State whether the target VxWorks + OS features TLS support, true for RTPs on VxWorks 7. + * config/vxworks.c (vxworks_override_options): Setup emutls + accordingly. + 2017-06-27 Jakub Jelinek * predict.c (test_prediction_value_range): Use -1U instead of -1 diff --git a/gcc/config/vxworks.c b/gcc/config/vxworks.c index 8f1c78d5207..944cc1d239b 100644 --- a/gcc/config/vxworks.c +++ b/gcc/config/vxworks.c @@ -125,20 +125,24 @@ vxworks_emutls_var_init (tree var, tree decl, tree tmpl_addr) void vxworks_override_options (void) { - /* We don't support __thread via target hooks. */ - targetm.have_tls = false; - - targetm.emutls.get_address = "__builtin___tls_lookup"; - targetm.emutls.register_common = NULL; - targetm.emutls.var_section = ".tls_vars"; - targetm.emutls.tmpl_section = ".tls_data"; - targetm.emutls.var_prefix = "__tls__"; - targetm.emutls.tmpl_prefix = ""; - targetm.emutls.var_fields = vxworks_emutls_var_fields; - targetm.emutls.var_init = vxworks_emutls_var_init; - targetm.emutls.var_align_fixed = true; - targetm.emutls.debug_form_tls_address = true; - + /* Setup the tls emulation bits if the OS misses proper + tls support. */ + targetm.have_tls = VXWORKS_HAVE_TLS; + + if (!VXWORKS_HAVE_TLS) + { + targetm.emutls.get_address = "__builtin___tls_lookup"; + targetm.emutls.register_common = NULL; + targetm.emutls.var_section = ".tls_vars"; + targetm.emutls.tmpl_section = ".tls_data"; + targetm.emutls.var_prefix = "__tls__"; + targetm.emutls.tmpl_prefix = ""; + targetm.emutls.var_fields = vxworks_emutls_var_fields; + targetm.emutls.var_init = vxworks_emutls_var_init; + targetm.emutls.var_align_fixed = true; + targetm.emutls.debug_form_tls_address = true; + } + /* We can use .ctors/.dtors sections only in RTP mode. */ targetm.have_ctors_dtors = TARGET_VXWORKS_RTP; diff --git a/gcc/config/vxworks.h b/gcc/config/vxworks.h index 9afd332e014..e78ea280050 100644 --- a/gcc/config/vxworks.h +++ b/gcc/config/vxworks.h @@ -81,16 +81,22 @@ along with GCC; see the file COPYING3. If not see and its structure is fixed and does not depend on the arch. We can thus tell gcc where to look for when linking with RTP libraries. */ +/* On Vx7 RTP, we need to drag the __tls__ symbol to trigger initialization of + tlsLib, responsible for TLS support by the OS. */ + #if TARGET_VXWORKS7 #define VXWORKS_LIBS_DIR_RTP "-L%:getenv(VSB_DIR /usr/lib/common)" +#define TLS_SYM "-u __tls__" #else #define VXWORKS_LIBS_DIR_RTP "" +#define TLS_SYM "" #endif #undef VXWORKS_LIB_SPEC #define VXWORKS_LIB_SPEC \ "%{mrtp:%{shared:-u " USER_LABEL_PREFIX "__init -u " USER_LABEL_PREFIX "__fini} \ %{!shared:%{non-static:-u " USER_LABEL_PREFIX "_STI__6__rtld -ldl} \ + " TLS_SYM " \ --start-group " VXWORKS_LIBS_RTP " --end-group} \ " VXWORKS_LIBS_DIR_RTP "}" @@ -126,6 +132,9 @@ along with GCC; see the file COPYING3. If not see #define VXWORKS_ENDFILE_SPEC "" /* Do VxWorks-specific parts of TARGET_OPTION_OVERRIDE. */ + +#define VXWORKS_HAVE_TLS (TARGET_VXWORKS7 && TARGET_VXWORKS_RTP) + #undef VXWORKS_OVERRIDE_OPTIONS #define VXWORKS_OVERRIDE_OPTIONS vxworks_override_options () extern void vxworks_override_options (void); -- 2.30.2