/* Definitions for SOM assembler support.
- Copyright (C) 1999 Free Software Foundation, Inc.
+ Copyright (C) 1999, 2001, 2002, 2003 Free Software Foundation, Inc.
This file is part of GNU CC.
Boston, MA 02111-1307, USA. */
/* So we can conditionalize small amounts of code in pa.c or pa.md. */
-#define OBJ_SOM
+#undef TARGET_SOM
+#define TARGET_SOM 1
/* We do not use BINCL stabs in SOM.
??? If it does not hurt, we probably should to avoid useless divergence
from other embedded stabs implementations. */
#undef DBX_USE_BINCL
-#undef ASM_IDENTIFY_GCC
-#define ASM_IDENTIFY_GCC(FILE)
-
-#undef ASM_IDENTIFY_GCC_AFTER_SOURCE
-#define ASM_IDENTIFY_GCC_AFTER_SOURCE(FILE)
-
/* We make the first line stab special to avoid adding several
gross hacks to GAS. */
#undef ASM_OUTPUT_SOURCE_LINE
last_function_decl = current_function_decl; \
sym_lineno += 1; }
-/* gdb needs a null N_SO at the end of each file for scattered loading. */
+/* gdb needs a null N_SO at the end of each file for scattered loading. */
#undef DBX_OUTPUT_MAIN_SOURCE_FILE_END
#define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME) \
fprintf (FILE, \
"\t.stabs \"\",%d,0,0,L$text_end0000\nL$text_end0000:\n", N_SO)
+/* Select a format to encode pointers in exception handling data. CODE
+ is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is
+ true if the symbol may be affected by dynamic relocations. Because
+ the HP assembler does auto alignment, it is necessary to use
+ DW_EH_PE_aligned instead of the default DW_EH_PE_absptr. */
+
+#define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
+ (TARGET_GAS ? DW_EH_PE_absptr : DW_EH_PE_aligned)
+
/* HPUX has a program 'chatr' to list the dependencies of dynamically
linked executables and shared libraries. */
#define LDD_SUFFIX "chatr"
that the section name will have a "." prefix. */
#define ASM_OUTPUT_FUNCTION_PREFIX(FILE, NAME) \
{ \
- const char *name; \
- STRIP_NAME_ENCODING (name, NAME); \
+ const char *name = (*targetm.strip_name_encoding) (NAME); \
if (TARGET_GAS && in_section == in_text) \
fputs ("\t.NSUBSPA $CODE$,QUAD=0,ALIGN=8,ACCESS=44,CODE_ONLY\n", FILE); \
else if (TARGET_GAS) \
} \
} \
/* anonymous args */ \
- if ((TYPE_ARG_TYPES (tree_type) != 0 \
- && (TREE_VALUE (tree_last (TYPE_ARG_TYPES (tree_type)))\
- != void_type_node)) \
- || current_function_varargs) \
+ if (TYPE_ARG_TYPES (tree_type) != 0 \
+ && (TREE_VALUE (tree_last (TYPE_ARG_TYPES (tree_type)))\
+ != void_type_node)) \
{ \
for (; i < 4; i++) \
fprintf (FILE, ",ARGW%d=GR", i); \
/* Supposedly the assembler rejects the command if there is no tab! */
#define READONLY_DATA_ASM_OP "\t.SPACE $TEXT$\n\t.SUBSPA $LIT$\n"
-#define READONLY_DATA_SECTION readonly_data
-
-/* Output before writable data. */
-
-/* Supposedly the assembler rejects the command if there is no tab! */
-#define DATA_SECTION_ASM_OP "\t.SPACE $PRIVATE$\n\t.SUBSPA $DATA$\n"
-
-/* Output before uninitialized data. */
-
-#define BSS_SECTION_ASM_OP "\t.SPACE $PRIVATE$\n\t.SUBSPA $BSS$\n"
-
-/* Define the .bss section for ASM_OUTPUT_LOCAL to use. */
-
-#ifndef CTORS_SECTION_FUNCTION
#define EXTRA_SECTIONS in_readonly_data
-#define CTORS_SECTION_FUNCTION
-#define DTORS_SECTION_FUNCTION
-#else
-#define EXTRA_SECTIONS in_readonly_data, in_ctors, in_dtors
-#endif
-
-/* Switch into a generic section.
- This is currently only used to support section attributes.
- We make the section read-only and executable for a function decl,
- read-only for a const data decl, and writable for a non-const data decl. */
-#define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME, RELOC) \
- if (DECL && TREE_CODE (DECL) == FUNCTION_DECL) \
- { \
- fputs ("\t.SPACE $TEXT$\n", FILE); \
- fprintf (FILE, \
- "\t.SUBSPA %s%s%s,QUAD=0,ALIGN=8,ACCESS=44,CODE_ONLY,SORT=24\n",\
- TARGET_GAS ? "" : "$", NAME, TARGET_GAS ? "" : "$"); \
- } \
- else if (DECL && DECL_READONLY_SECTION (DECL, RELOC)) \
- { \
- fputs ("\t.SPACE $TEXT$\n", FILE); \
- fprintf (FILE, \
- "\t.SUBSPA %s%s%s,QUAD=0,ALIGN=8,ACCESS=44,SORT=16\n", \
- TARGET_GAS ? "" : "$", NAME, TARGET_GAS ? "" : "$"); \
- } \
- else \
- { \
- fputs ("\t.SPACE $PRIVATE$\n", FILE); \
- fprintf (FILE, \
- "\t.SUBSPA %s%s%s,QUAD=1,ALIGN=8,ACCESS=31,SORT=16\n", \
- TARGET_GAS ? "" : "$", NAME, TARGET_GAS ? "" : "$"); \
- }
+#define EXTRA_SECTION_FUNCTIONS \
+extern void readonly_data PARAMS ((void)); \
+void \
+readonly_data () \
+{ \
+ if (in_section != in_readonly_data) \
+ { \
+ in_section = in_readonly_data; \
+ fprintf (asm_out_file, "%s\n", READONLY_DATA_ASM_OP); \
+ } \
+}
/* FIXME: HPUX ld generates incorrect GOT entries for "T" fixups
which reference data within the $TEXT$ space (for example constant
data into the $PRIVATE$ subspace (this reduces sharing, but it
works correctly). */
-#define EXTRA_SECTION_FUNCTIONS \
-void \
-readonly_data () \
-{ \
- if (in_section != in_readonly_data) \
- { \
- if (flag_pic) \
- fprintf (asm_out_file, "%s\n", DATA_SECTION_ASM_OP); \
- else \
- fprintf (asm_out_file, "%s\n", READONLY_DATA_ASM_OP); \
- in_section = in_readonly_data; \
- } \
-} \
-CTORS_SECTION_FUNCTION \
-DTORS_SECTION_FUNCTION
+#define READONLY_DATA_SECTION (flag_pic ? data_section : readonly_data)
+
+/* Output before writable data. */
+
+/* Supposedly the assembler rejects the command if there is no tab! */
+#define DATA_SECTION_ASM_OP "\t.SPACE $PRIVATE$\n\t.SUBSPA $DATA$\n"
+
+/* Output before uninitialized data. */
+
+#define BSS_SECTION_ASM_OP "\t.SPACE $PRIVATE$\n\t.SUBSPA $BSS$\n"
+
+/* We must not have a reference to an external symbol defined in a
+ shared library in a readonly section, else the SOM linker will
+ complain.
+
+ So, we force exception information into the data section. */
+#define TARGET_ASM_EXCEPTION_SECTION data_section
/* This is how to output a command to make the user-level label named NAME
defined for reference from other files.
#define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
do { int save_referenced; \
save_referenced = TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (DECL)); \
- fputs ("\t.IMPORT ", FILE); \
- assemble_name (FILE, NAME); \
+ fputs ("\t.IMPORT ", FILE); \
+ assemble_name (FILE, NAME); \
if (FUNCTION_NAME_P (NAME)) \
fputs (",CODE\n", FILE); \
else \
"imported", even library calls. They look a bit different, so
here's this macro.
- Also note not all libcall names are passed to ENCODE_SECTION_INFO
+ Also note not all libcall names are passed to pa_encode_section_info
(__main for example). To make sure all libcall names have section
- info recorded in them, we do it here. */
+ info recorded in them, we do it here. We must also ensure that
+ we don't import a libcall that has been previously exported since
+ the HP assembler may change an ENTRY symbol to a CODE symbol. */
#define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, RTL) \
- do { fputs ("\t.IMPORT ", FILE); \
+ do { const char *name; \
+ tree id; \
+ \
if (!function_label_operand (RTL, VOIDmode)) \
hppa_encode_label (RTL); \
- assemble_name (FILE, XSTR ((RTL), 0)); \
- fputs (",CODE\n", FILE); \
+ \
+ name = (*targetm.strip_name_encoding) (XSTR ((RTL), 0)); \
+ id = maybe_get_identifier (name); \
+ if (! id || ! TREE_SYMBOL_REFERENCED (id)) \
+ { \
+ fputs ("\t.IMPORT ", FILE); \
+ assemble_name (FILE, XSTR ((RTL), 0)); \
+ fputs (",CODE\n", FILE); \
+ } \
} while (0)
-#define ASM_FILE_END(FILE) output_deferred_plabels (FILE)
-
/* We want __gcc_plt_call to appear in every program built by
gcc, so we make a reference to it out of __main.
We use the asm statement to fool the optimizer into not
/* The .align directive in the HP assembler allows up to a 32 alignment. */
#define MAX_OFILE_ALIGNMENT 32768
+/* The SOM linker hardcodes paths into binaries. As a result, dotdots
+ must be removed from library prefixes to prevent binaries from depending
+ on the location of the GCC tool directory. The downside is GCC
+ cannot be moved after installation using a symlink. */
+#define ALWAYS_STRIP_DOTDOT 1
+
+/* Aggregates with a single float or double field should be passed and
+ returned in the general registers. */
+#define MEMBER_TYPE_FORCES_BLK(FIELD, MODE) (MODE==SFmode || MODE==DFmode)
+
+/* If GAS supports weak, we can support weak when we have working linker
+ support for secondary definitions and are generating code for GAS. */
#ifdef HAVE_GAS_WEAK
-#define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
+#define SUPPORTS_WEAK (TARGET_SOM_SDEF && TARGET_GAS)
+#else
+#define SUPPORTS_WEAK 0
+#endif
-/* This is how we tell the assembler that a symbol is weak. */
+/* We can support one only if we support weak. */
+#define SUPPORTS_ONE_ONLY SUPPORTS_WEAK
+/* Use weak (secondary definitions) to make one only declarations. */
+#define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
+
+/* This is how we tell the assembler that a symbol is weak. The SOM
+ weak implementation uses the secondary definition (sdef) flag.
+
+ The behavior of sdef symbols is similar to ELF weak symbols in that
+ multiple definitions can occur without incurring a link error.
+ However, they differ in the following ways:
+ 1) Undefined sdef symbols are not allowed.
+ 2) The linker searches for undefined sdef symbols and will load an
+ archive library member to resolve an undefined sdef symbol.
+ 3) The exported symbol from a shared library is a primary symbol
+ rather than a sdef symbol. Thus, more care is needed in the
+ ordering of libraries.
+
+ It appears that the linker discards extra copies of "weak" functions
+ when linking shared libraries, independent of whether or not they
+ are in their own section. In linking final executables, -Wl,-O can
+ be used to remove dead procedures. Thus, support for named sections
+ is not needed and in previous testing caused problems with various
+ HP tools. */
#define ASM_WEAKEN_LABEL(FILE,NAME) \
- do { fputs ("\t.weak\t", FILE); \
- assemble_name (FILE, NAME); \
- fputc ('\n', FILE); \
- if (! FUNCTION_NAME_P (NAME)) \
- { \
- fputs ("\t.EXPORT ", FILE); \
- assemble_name (FILE, NAME); \
- fputs (",DATA\n", FILE); \
- } \
+ do { fputs ("\t.weak\t", FILE); \
+ assemble_name (FILE, NAME); \
+ fputc ('\n', FILE); \
+ if (! FUNCTION_NAME_P (NAME)) \
+ { \
+ fputs ("\t.EXPORT ", FILE); \
+ assemble_name (FILE, NAME); \
+ fputs (",DATA\n", FILE); \
+ } \
} while (0)
-#endif
+
+/* We can't handle weak aliases, and therefore can't support pragma weak.
+ Suppress the use of pragma weak in gthr-dce.h and gthr-posix.h. */
+#define GTHREAD_USE_WEAK 0
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