3d9268b697
* pa.c (pa_output_function_prologue): Don't accumulate the total number of code bytes when using TARGET_64BIT, or gas, SOM and not the portable runtime. (output_deferred_plabels): Handle 64bit plabels. (output_cbranch): Use $PIC_pcrel$0 for pc relative relocations when generating pic code using the GAS assembler for object formats that are not SOM (ie., ELF32 and ELF64). (output_millicode_call): Check attribute type if attribute length is 28. Likewise use $PIC_pcrel$0. Only call get_attr_length and dbr_sequence_length once. (output_call): Likewise use $PIC_pcrel$0, and call get_attr_length and dbr_sequence_length once. * pa.h (TARGET_SOM): Define if not defined. * pa.md (pattern to load address of label): Likewise use $PIC_pcrel$0 with GAS and not SOM. (jump, call_internal_reg, call_value_internal_reg): Likewise. * som.h (OBJ_SOM): Rename to TARGET_SOM. Undefine before defining. From-SVN: r52196
375 lines
13 KiB
C
375 lines
13 KiB
C
/* Definitions for SOM assembler support.
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Copyright (C) 1999, 2001, 2002 Free Software Foundation, Inc.
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* So we can conditionalize small amounts of code in pa.c or pa.md. */
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#undef TARGET_SOM
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#define TARGET_SOM 1
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/* We do not use BINCL stabs in SOM.
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??? If it does not hurt, we probably should to avoid useless divergence
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from other embedded stabs implementations. */
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#undef DBX_USE_BINCL
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/* We make the first line stab special to avoid adding several
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gross hacks to GAS. */
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#undef ASM_OUTPUT_SOURCE_LINE
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#define ASM_OUTPUT_SOURCE_LINE(file, line) \
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{ static int sym_lineno = 1; \
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static tree last_function_decl = NULL; \
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if (current_function_decl == last_function_decl) \
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fprintf (file, "\t.stabn 68,0,%d,L$M%d-%s\nL$M%d:\n", \
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line, sym_lineno, \
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XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0) + 1, \
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sym_lineno); \
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else \
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fprintf (file, "\t.stabn 68,0,%d,0\n", line); \
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last_function_decl = current_function_decl; \
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sym_lineno += 1; }
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/* gdb needs a null N_SO at the end of each file for scattered loading. */
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#undef DBX_OUTPUT_MAIN_SOURCE_FILE_END
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#define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME) \
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text_section (); \
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fputs ("\t.SPACE $TEXT$\n\t.NSUBSPA $CODE$,QUAD=0,ALIGN=8,ACCESS=44,CODE_ONLY\n", FILE); \
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fprintf (FILE, \
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"\t.stabs \"\",%d,0,0,L$text_end0000\nL$text_end0000:\n", N_SO)
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/* Select a format to encode pointers in exception handling data. CODE
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is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is
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true if the symbol may be affected by dynamic relocations. Because
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the HP assembler does auto alignment, it is necessary to use
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DW_EH_PE_aligned instead of the default DW_EH_PE_absptr. */
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#define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
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(TARGET_GAS ? DW_EH_PE_absptr : DW_EH_PE_aligned)
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/* HPUX has a program 'chatr' to list the dependencies of dynamically
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linked executables and shared libraries. */
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#define LDD_SUFFIX "chatr"
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/* Look for lines like "dynamic /usr/lib/X11R5/libX11.sl"
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or "static /usr/lib/X11R5/libX11.sl".
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HPUX 10.20 also has lines like "static branch prediction ..."
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so we filter that out explicitly.
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We also try to bound our search for libraries with marker
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lines. What a pain. */
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#define PARSE_LDD_OUTPUT(PTR) \
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do { \
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static int in_shlib_list = 0; \
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while (*PTR == ' ') PTR++; \
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if (strncmp (PTR, "shared library list:", \
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sizeof ("shared library list:") - 1) == 0) \
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{ \
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PTR = 0; \
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in_shlib_list = 1; \
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} \
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else if (strncmp (PTR, "shared library binding:", \
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sizeof ("shared library binding:") - 1) == 0)\
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{ \
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PTR = 0; \
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in_shlib_list = 0; \
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} \
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else if (strncmp (PTR, "static branch prediction disabled", \
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sizeof ("static branch prediction disabled") - 1) == 0)\
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{ \
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PTR = 0; \
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in_shlib_list = 0; \
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} \
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else if (in_shlib_list \
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&& strncmp (PTR, "dynamic", sizeof ("dynamic") - 1) == 0) \
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{ \
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PTR += sizeof ("dynamic") - 1; \
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while (*p == ' ') PTR++; \
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} \
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else if (in_shlib_list \
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&& strncmp (PTR, "static", sizeof ("static") - 1) == 0) \
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{ \
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PTR += sizeof ("static") - 1; \
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while (*p == ' ') PTR++; \
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} \
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else \
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PTR = 0; \
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} while (0)
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/* Output the label for a function definition. */
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#ifndef HP_FP_ARG_DESCRIPTOR_REVERSED
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#define ASM_DOUBLE_ARG_DESCRIPTORS(FILE, ARG0, ARG1) \
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do { fprintf (FILE, ",ARGW%d=FR", (ARG0)); \
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fprintf (FILE, ",ARGW%d=FU", (ARG1));} while (0)
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#define DFMODE_RETURN_STRING ",RTNVAL=FU"
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#define SFMODE_RETURN_STRING ",RTNVAL=FR"
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#else
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#define ASM_DOUBLE_ARG_DESCRIPTORS(FILE, ARG0, ARG1) \
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do { fprintf (FILE, ",ARGW%d=FU", (ARG0)); \
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fprintf (FILE, ",ARGW%d=FR", (ARG1));} while (0)
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#define DFMODE_RETURN_STRING ",RTNVAL=FR"
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#define SFMODE_RETURN_STRING ",RTNVAL=FU"
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#endif
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/* NAME refers to the function's name. If we are placing each function into
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its own section, we need to switch to the section for this function. Note
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that the section name will have a "." prefix. */
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#define ASM_OUTPUT_FUNCTION_PREFIX(FILE, NAME) \
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{ \
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const char *name; \
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STRIP_NAME_ENCODING (name, NAME); \
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if (TARGET_GAS && in_section == in_text) \
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fputs ("\t.NSUBSPA $CODE$,QUAD=0,ALIGN=8,ACCESS=44,CODE_ONLY\n", FILE); \
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else if (TARGET_GAS) \
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fprintf (FILE, \
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"\t.SUBSPA .%s\n", name); \
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}
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#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
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do { tree fntype = TREE_TYPE (TREE_TYPE (DECL)); \
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tree tree_type = TREE_TYPE (DECL); \
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tree parm; \
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int i; \
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if (TREE_PUBLIC (DECL) || TARGET_GAS) \
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{ \
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if (TREE_PUBLIC (DECL)) \
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{ \
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fputs ("\t.EXPORT ", FILE); \
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assemble_name (FILE, NAME); \
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fputs (",ENTRY,PRIV_LEV=3", FILE); \
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} \
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else \
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{ \
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fputs ("\t.PARAM ", FILE); \
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assemble_name (FILE, NAME); \
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fputs (",PRIV_LEV=3", FILE); \
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} \
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for (parm = DECL_ARGUMENTS (DECL), i = 0; parm && i < 4; \
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parm = TREE_CHAIN (parm)) \
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{ \
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if (TYPE_MODE (DECL_ARG_TYPE (parm)) == SFmode \
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&& ! TARGET_SOFT_FLOAT) \
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fprintf (FILE, ",ARGW%d=FR", i++); \
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else if (TYPE_MODE (DECL_ARG_TYPE (parm)) == DFmode \
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&& ! TARGET_SOFT_FLOAT) \
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{ \
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if (i <= 2) \
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{ \
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if (i == 1) i++; \
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ASM_DOUBLE_ARG_DESCRIPTORS (FILE, i++, i++); \
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} \
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else \
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break; \
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} \
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else \
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{ \
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int arg_size = \
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FUNCTION_ARG_SIZE (TYPE_MODE (DECL_ARG_TYPE (parm)),\
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DECL_ARG_TYPE (parm)); \
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/* Passing structs by invisible reference uses \
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one general register. */ \
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if (arg_size > 2 \
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|| TREE_ADDRESSABLE (DECL_ARG_TYPE (parm))) \
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arg_size = 1; \
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if (arg_size == 2 && i <= 2) \
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{ \
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if (i == 1) i++; \
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fprintf (FILE, ",ARGW%d=GR", i++); \
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fprintf (FILE, ",ARGW%d=GR", i++); \
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} \
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else if (arg_size == 1) \
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fprintf (FILE, ",ARGW%d=GR", i++); \
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else \
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i += arg_size; \
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} \
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} \
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/* anonymous args */ \
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if ((TYPE_ARG_TYPES (tree_type) != 0 \
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&& (TREE_VALUE (tree_last (TYPE_ARG_TYPES (tree_type)))\
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!= void_type_node)) \
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|| current_function_varargs) \
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{ \
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for (; i < 4; i++) \
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fprintf (FILE, ",ARGW%d=GR", i); \
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} \
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if (TYPE_MODE (fntype) == DFmode && ! TARGET_SOFT_FLOAT) \
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fputs (DFMODE_RETURN_STRING, FILE); \
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else if (TYPE_MODE (fntype) == SFmode && ! TARGET_SOFT_FLOAT) \
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fputs (SFMODE_RETURN_STRING, FILE); \
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else if (fntype != void_type_node) \
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fputs (",RTNVAL=GR", FILE); \
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fputs ("\n", FILE); \
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}} while (0)
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/* Output at beginning of assembler file. */
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#define ASM_FILE_START(FILE) \
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do { \
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if (TARGET_PA_20) \
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fputs("\t.LEVEL 2.0\n", FILE); \
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else if (TARGET_PA_11) \
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fputs("\t.LEVEL 1.1\n", FILE); \
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else \
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fputs("\t.LEVEL 1.0\n", FILE); \
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fputs ("\t.SPACE $PRIVATE$\n\
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\t.SUBSPA $DATA$,QUAD=1,ALIGN=8,ACCESS=31\n\
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\t.SUBSPA $BSS$,QUAD=1,ALIGN=8,ACCESS=31,ZERO,SORT=82\n\
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\t.SPACE $TEXT$\n\
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\t.SUBSPA $LIT$,QUAD=0,ALIGN=8,ACCESS=44\n\
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\t.SUBSPA $CODE$,QUAD=0,ALIGN=8,ACCESS=44,CODE_ONLY\n\
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\t.IMPORT $global$,DATA\n\
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\t.IMPORT $$dyncall,MILLICODE\n", FILE);\
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if (profile_flag)\
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fprintf (FILE, "\t.IMPORT _mcount, CODE\n");\
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if (write_symbols != NO_DEBUG) \
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output_file_directive ((FILE), main_input_filename); \
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} while (0)
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/* Output before code. */
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/* Supposedly the assembler rejects the command if there is no tab! */
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#define TEXT_SECTION_ASM_OP "\t.SPACE $TEXT$\n\t.SUBSPA $CODE$\n"
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/* Output before read-only data. */
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/* Supposedly the assembler rejects the command if there is no tab! */
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#define READONLY_DATA_ASM_OP "\t.SPACE $TEXT$\n\t.SUBSPA $LIT$\n"
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#define READONLY_DATA_SECTION readonly_data
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/* Output before writable data. */
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/* Supposedly the assembler rejects the command if there is no tab! */
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#define DATA_SECTION_ASM_OP "\t.SPACE $PRIVATE$\n\t.SUBSPA $DATA$\n"
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/* Output before uninitialized data. */
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#define BSS_SECTION_ASM_OP "\t.SPACE $PRIVATE$\n\t.SUBSPA $BSS$\n"
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/* We must not have a reference to an external symbol defined in a
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shared library in a readonly section, else the SOM linker will
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complain.
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So, we force exception information into the data section. */
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#define TARGET_ASM_EXCEPTION_SECTION data_section
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/* Define the .bss section for ASM_OUTPUT_LOCAL to use. */
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#define EXTRA_SECTIONS in_readonly_data
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/* FIXME: HPUX ld generates incorrect GOT entries for "T" fixups
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which reference data within the $TEXT$ space (for example constant
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strings in the $LIT$ subspace).
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The assemblers (GAS and HP as) both have problems with handling
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the difference of two symbols which is the other correct way to
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reference constant data during PIC code generation.
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So, there's no way to reference constant data which is in the
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$TEXT$ space during PIC generation. Instead place all constant
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data into the $PRIVATE$ subspace (this reduces sharing, but it
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works correctly). */
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#define EXTRA_SECTION_FUNCTIONS \
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extern void readonly_data PARAMS ((void)); \
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void \
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readonly_data () \
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{ \
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if (in_section != in_readonly_data) \
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{ \
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if (flag_pic) \
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fprintf (asm_out_file, "%s\n", DATA_SECTION_ASM_OP); \
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else \
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fprintf (asm_out_file, "%s\n", READONLY_DATA_ASM_OP); \
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in_section = in_readonly_data; \
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} \
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}
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/* This is how to output a command to make the user-level label named NAME
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defined for reference from other files.
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We call assemble_name, which in turn sets TREE_SYMBOL_REFERENCED. This
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macro will restore the original value of TREE_SYMBOL_REFERENCED to avoid
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placing useless function definitions in the output file.
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Also note that the SOM based tools need the symbol imported as a CODE
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symbol, while the ELF based tools require the symbol to be imported as
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an ENTRY symbol. What a crock. */
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#define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
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do { int save_referenced; \
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save_referenced = TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (DECL)); \
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fputs ("\t.IMPORT ", FILE); \
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assemble_name (FILE, NAME); \
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if (FUNCTION_NAME_P (NAME)) \
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fputs (",CODE\n", FILE); \
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else \
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fputs (",DATA\n", FILE); \
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TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (DECL)) = save_referenced; \
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} while (0)
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/* The bogus HP assembler requires ALL external references to be
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"imported", even library calls. They look a bit different, so
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here's this macro.
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Also note not all libcall names are passed to ENCODE_SECTION_INFO
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(__main for example). To make sure all libcall names have section
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info recorded in them, we do it here. We must also ensure that
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we don't import a libcall that has been previously exported since
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the HP assembler may change an ENTRY symbol to a CODE symbol. */
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#define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, RTL) \
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do { const char *name; \
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tree id; \
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\
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if (!function_label_operand (RTL, VOIDmode)) \
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hppa_encode_label (RTL); \
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\
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STRIP_NAME_ENCODING (name, XSTR ((RTL), 0)); \
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id = maybe_get_identifier (name); \
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if (! id || ! TREE_SYMBOL_REFERENCED (id)) \
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{ \
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fputs ("\t.IMPORT ", FILE); \
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assemble_name (FILE, XSTR ((RTL), 0)); \
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fputs (",CODE\n", FILE); \
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} \
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} while (0)
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/* We want __gcc_plt_call to appear in every program built by
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gcc, so we make a reference to it out of __main.
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We use the asm statement to fool the optimizer into not
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removing the dead (but important) initialization of
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REFERENCE. */
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#define DO_GLOBAL_DTORS_BODY \
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do { \
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extern void __gcc_plt_call (); \
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void (*reference)() = &__gcc_plt_call; \
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func_ptr *p; \
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__asm__ ("" : : "r" (reference)); \
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for (p = __DTOR_LIST__ + 1; *p; ) \
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(*p++) (); \
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} while (0)
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/* The .align directive in the HP assembler allows up to a 32 alignment. */
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#define MAX_OFILE_ALIGNMENT 32768
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/* SOM does not support the init_priority C++ attribute. */
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#undef SUPPORTS_INIT_PRIORITY
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#define SUPPORTS_INIT_PRIORITY 0
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