* targhooks.h (default_emutls_var_fields,

	default_emutls_var_init): Declare.
	* tree.h (DECL_THREAD_LOCAL): Compare against TLS_MODEL_REAL.
	* target.h (struct gcc_target): Add struct emutls member.
	* target-def.h (TARGET_EMUTLS_GET_ADDRESS,
	TARGET_EMUTLS_REGISTER_COMMON, TARGET_EMUTLS_VAR_SECTION,
	TARGET_EMUTLS_TMPL_SECTION, TARGET_EMUTLS_VAR_PREFIX,
	TARGET_EMUTLS_TMPL_PREFIX, TARGET_EMUTLS_VAR_FIELDS,
	TARGET_EMUTLS_VAR_INIT, TARGET_EMUTLS_DEBUG_FORM_TLS_ADDRESS,
	TARGET_EMUTLS_VAR_ALIGN_FIXED, TARGET_EMUTLS): New.
	(TARGET_INITIALIZER): Add TARGET_EMUTLS.
	* builtins.def (BUILT_IN_EMUTLS_GET_ADDRESS,
	BUILT_IN_EMUTLS_REGISTER_COMMON): Get name from targetm structure.
	* dwarf2out.c (loc_descriptor_from_tree_1): Check if emutls can
	emit debug information.
	* coretypes.h (tls_model): Add TLS_MODEL_EMULATED, TLS_MODEL_REAL.
	* varasm.c: Include targhooks.h.
	(emutls_object_section, emutls_tmpl_section): New.
	(EMUTLS_VAR_PREFIX, EMUTLS_TMPL_PREFIX): Remove.
	(EMUTLS_SEPARATOR): New.
	(prefix_name): New.
	(get_emutls_object_name): New.
	(default_emutls_var_fields): New, broken out of ...
	(get_emutls_object_type): ... here.  Adjust to use target hooks.
	(get_emutls_init_templ_addr): Adjust to use target hooks.
	(emutls_decl): Adjust to use target hooks.
	(emutls_finish): Likewise.
	(default_emutls_var_init): New, broken out of ...
	(assemble_variable): ... here.  Adjust to use target hooks.
	* output.h (enum section_category): Add SECCAT_EMUTLS_VAR,
	SECCAT_EMUTLS_TMPL.
	* c-common.c (handle_section_attribute): Prevent overriding
	sections for emulated tls with special sections.
	* config/i386/i386.c (x86_64_elf_select_section): Add
	SECCAT_EMUTLS_VAR and SECCAT_EMUTLS_TMPL.
	(x86_64_elf_unique_section): Likewise.
	* config/vxworks.c: Include tree.h.
	(vxworks_emutls_var_fields, vxworks_emutls_var_init): New.
	(vxworks_override_options): Set TLS scheme.
	* gcc/doc/tm.texi (Emulated TLS): New node.

	gcc/testsuite/
	* gcc.dg/tls/section-2.c: New.
	* gcc.dg/tls/emutls-1.c: New.
	* lib/target-supports.exp (check_effective_target_tls_native):
	Exclude vxworks.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@134729 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 28 insertions, 0 deletions

diff --git a/gcc/target.h b/gcc/target.h
index 128a0292a15..c331020b6ab 100644
--- a/gcc/target.h
+++ b/gcc/target.h
@@ -917,6 +917,34 @@ struct gcc_target
     void (*adjust_class_at_definition) (tree type);
   } cxx;
 
+  /* Functions and data for emulated TLS support.  */
+  struct emutls {
+    /* Name of the address and common functions.  */
+    const char *get_address;
+    const char *register_common;
+
+    /* Prefixes for proxy variable and template.  */
+    const char *var_section;
+    const char *tmpl_section;
+
+    /* Prefixes for proxy variable and template.  */
+    const char *var_prefix;
+    const char *tmpl_prefix;
+    
+    /* Function to generate field definitions of the proxy variable.  */
+    tree (*var_fields) (tree, tree *);
+
+    /* Function to initialize a proxy variable.  */
+    tree (*var_init) (tree, tree, tree);
+
+    /* Whether we are allowed to alter the usual alignment of the
+       proxy variable.  */
+    bool var_align_fixed;
+
+    /* Whether we can emit debug information for TLS vars.  */
+    bool debug_form_tls_address;
+  } emutls;  
+
   /* For targets that need to mark extra registers as live on entry to
      the function, they should define this target hook and set their
      bits in the bitmap passed in. */