implement several new section types including comdat for ELF, this potentially...

implement several new section types including comdat for ELF, this potentially breaks COFF and MACHO (will fix it asap)

[r27136]

ir/be/begnuas.h

@@ -31,19 +31,21 @@
 #include "be.h"
 #include "beemitter.h"
 
-typedef enum section_t {
-	GAS_SECTION_TEXT,   /**< text section - contains program code */
-	GAS_SECTION_DATA,   /**< data section - contains arbitrary data */
-	GAS_SECTION_RODATA, /**< rodata section - contains read-only data */
-	GAS_SECTION_BSS,    /**< bss section - contains uninitialized data */
-	GAS_SECTION_TLS_DATA, /**< thread local storage section */
-	GAS_SECTION_TLS_BSS,  /**< thread local storage yero initialized */
-	GAS_SECTION_CONSTRUCTORS,   /**< ctors section */
-	GAS_SECTION_DESTRUCTORS,    /**< dtors section */
-	GAS_SECTION_CSTRING, /**< section for constant strings */
+typedef enum {
+	GAS_SECTION_TEXT,            /**< text section - program code */
+	GAS_SECTION_DATA,            /**< data section - arbitrary data */
+	GAS_SECTION_RODATA,          /**< rodata section - read-only data */
+	GAS_SECTION_BSS,             /**< bss section - zero initialized data */
+	GAS_SECTION_CONSTRUCTORS,    /**< ctors section */
+	GAS_SECTION_DESTRUCTORS,     /**< dtors section */
+	GAS_SECTION_CSTRING,         /**< section for constant strings */
 	GAS_SECTION_PIC_TRAMPOLINES, /**< trampolines for pic codes */
 	GAS_SECTION_PIC_SYMBOLS,     /**< contains resolved pic symbols */
-	GAS_SECTION_LAST = GAS_SECTION_PIC_SYMBOLS
+	GAS_SECTION_LAST = GAS_SECTION_PIC_SYMBOLS,
+	GAS_SECTION_TYPE_MASK    = 0xFF,
+
+	GAS_SECTION_FLAG_TLS     = 1 << 8,  /**< thread local flag */
+	GAS_SECTION_FLAG_COMDAT  = 1 << 9   /**< thread local version of _BSS */
 } be_gas_section_t;
 
 typedef enum object_file_format_t {

ir/tr/trvrfy.c

@@ -452,8 +452,8 @@ int tr_vrfy(void)
 		/* this is odd and should not be allowed I think */
 		ASSERT_AND_RET(!is_method_entity(entity),
 		               "method in THREAD_LOCAL segment", 1);
-		ASSERT_AND_RET(!(get_entity_linkage(entity) & IR_LINKAGE_MERGE),
-		               "IR_LINKAGE_MERGE currently not support for thread locals", 1);
+		ASSERT_AND_RET(! (get_entity_linkage(entity) & IR_LINKAGE_CONSTANT),
+		               "thread locals must not be constant", 1);
 	}
 
 	return res;