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Diffstat (limited to 'gcc-4.9/gcc/config/pa/som.h')
| -rw-r--r-- | gcc-4.9/gcc/config/pa/som.h | 345 |
1 files changed, 345 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/config/pa/som.h b/gcc-4.9/gcc/config/pa/som.h new file mode 100644 index 000000000..aa0402aa3 --- /dev/null +++ b/gcc-4.9/gcc/config/pa/som.h @@ -0,0 +1,345 @@ +/* Definitions for SOM assembler support. + Copyright (C) 1999-2014 Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 3, or (at your option) +any later version. + +GCC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING3. If not see +<http://www.gnu.org/licenses/>. */ + +/* So we can conditionalize small amounts of code in pa.c or pa.md. */ +#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 + +#define DBX_LINES_FUNCTION_RELATIVE 1 + +/* gdb needs a null N_SO at the end of each file for scattered loading. */ + +#define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END + +/* HPUX has a program 'chatr' to list the dependencies of dynamically + linked executables and shared libraries. */ +#define LDD_SUFFIX "chatr" +/* Look for lines like "dynamic /usr/lib/X11R5/libX11.sl" + or "static /usr/lib/X11R5/libX11.sl". + + HPUX 10.20 also has lines like "static branch prediction ..." + so we filter that out explicitly. + + We also try to bound our search for libraries with marker + lines. What a pain. */ +#define PARSE_LDD_OUTPUT(PTR) \ +do { \ + static int in_shlib_list = 0; \ + while (*PTR == ' ') PTR++; \ + if (strncmp (PTR, "shared library list:", \ + sizeof ("shared library list:") - 1) == 0) \ + { \ + PTR = 0; \ + in_shlib_list = 1; \ + } \ + else if (strncmp (PTR, "shared library binding:", \ + sizeof ("shared library binding:") - 1) == 0)\ + { \ + PTR = 0; \ + in_shlib_list = 0; \ + } \ + else if (strncmp (PTR, "static branch prediction disabled", \ + sizeof ("static branch prediction disabled") - 1) == 0)\ + { \ + PTR = 0; \ + in_shlib_list = 0; \ + } \ + else if (in_shlib_list \ + && strncmp (PTR, "dynamic", sizeof ("dynamic") - 1) == 0) \ + { \ + PTR += sizeof ("dynamic") - 1; \ + while (*p == ' ') PTR++; \ + } \ + else if (in_shlib_list \ + && strncmp (PTR, "static", sizeof ("static") - 1) == 0) \ + { \ + PTR += sizeof ("static") - 1; \ + while (*p == ' ') PTR++; \ + } \ + else \ + PTR = 0; \ +} while (0) + +/* Output the label for a function definition. */ +#ifndef HP_FP_ARG_DESCRIPTOR_REVERSED +#define ASM_DOUBLE_ARG_DESCRIPTORS(FILE, ARG0, ARG1) \ + do { fprintf (FILE, ",ARGW%d=FR", (ARG0)); \ + fprintf (FILE, ",ARGW%d=FU", (ARG1));} while (0) +#define DFMODE_RETURN_STRING ",RTNVAL=FU" +#define SFMODE_RETURN_STRING ",RTNVAL=FR" +#else +#define ASM_DOUBLE_ARG_DESCRIPTORS(FILE, ARG0, ARG1) \ + do { fprintf (FILE, ",ARGW%d=FU", (ARG0)); \ + fprintf (FILE, ",ARGW%d=FR", (ARG1));} while (0) +#define DFMODE_RETURN_STRING ",RTNVAL=FR" +#define SFMODE_RETURN_STRING ",RTNVAL=FU" +#endif + + +#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ + do { tree fntype = TREE_TYPE (TREE_TYPE (DECL)); \ + tree tree_type = TREE_TYPE (DECL); \ + tree parm; \ + int i; \ + if (TREE_PUBLIC (DECL) || TARGET_GAS) \ + { \ + if (TREE_PUBLIC (DECL)) \ + { \ + fputs ("\t.EXPORT ", FILE); \ + assemble_name (FILE, NAME); \ + fputs (",ENTRY,PRIV_LEV=3", FILE); \ + } \ + else \ + { \ + fputs ("\t.PARAM ", FILE); \ + assemble_name (FILE, NAME); \ + fputs (",PRIV_LEV=3", FILE); \ + } \ + for (parm = DECL_ARGUMENTS (DECL), i = 0; parm && i < 4; \ + parm = DECL_CHAIN (parm)) \ + { \ + if (TYPE_MODE (DECL_ARG_TYPE (parm)) == SFmode \ + && ! TARGET_SOFT_FLOAT) \ + fprintf (FILE, ",ARGW%d=FR", i++); \ + else if (TYPE_MODE (DECL_ARG_TYPE (parm)) == DFmode \ + && ! TARGET_SOFT_FLOAT) \ + { \ + if (i <= 2) \ + { \ + if (i == 1) i++; \ + ASM_DOUBLE_ARG_DESCRIPTORS (FILE, i++, i++); \ + } \ + else \ + break; \ + } \ + else \ + { \ + int arg_size = \ + FUNCTION_ARG_SIZE (TYPE_MODE (DECL_ARG_TYPE (parm)),\ + DECL_ARG_TYPE (parm)); \ + /* Passing structs by invisible reference uses \ + one general register. */ \ + if (arg_size > 2 \ + || TREE_ADDRESSABLE (DECL_ARG_TYPE (parm))) \ + arg_size = 1; \ + if (arg_size == 2 && i <= 2) \ + { \ + if (i == 1) i++; \ + fprintf (FILE, ",ARGW%d=GR", i++); \ + fprintf (FILE, ",ARGW%d=GR", i++); \ + } \ + else if (arg_size == 1) \ + fprintf (FILE, ",ARGW%d=GR", i++); \ + else \ + i += arg_size; \ + } \ + } \ + /* anonymous args */ \ + if (stdarg_p (tree_type)) \ + { \ + for (; i < 4; i++) \ + fprintf (FILE, ",ARGW%d=GR", i); \ + } \ + if (TYPE_MODE (fntype) == DFmode && ! TARGET_SOFT_FLOAT) \ + fputs (DFMODE_RETURN_STRING, FILE); \ + else if (TYPE_MODE (fntype) == SFmode && ! TARGET_SOFT_FLOAT) \ + fputs (SFMODE_RETURN_STRING, FILE); \ + else if (fntype != void_type_node) \ + fputs (",RTNVAL=GR", FILE); \ + fputs ("\n", FILE); \ + }} while (0) + +#define TARGET_ASM_FILE_START pa_som_file_start +#define TARGET_ASM_INIT_SECTIONS pa_som_asm_init_sections + +/* String to output before writable data. */ +#define DATA_SECTION_ASM_OP "\t.SPACE $PRIVATE$\n\t.SUBSPA $DATA$\n" + +/* String to output before uninitialized data. */ +#define BSS_SECTION_ASM_OP "\t.SPACE $PRIVATE$\n\t.SUBSPA $BSS$\n" + +/* This is how to output a command to make the user-level label + named NAME defined for reference from other files. We use + assemble_name_raw instead of assemble_name since a symbol in + a .IMPORT directive that isn't otherwise referenced is not + placed in the symbol table of the assembled object. + + Failure to import a function reference can cause the HP linker + to segmentation fault! + + Note that the SOM based tools need the symbol imported as a + CODE symbol, while the ELF based tools require the symbol to + be imported as an ENTRY symbol. */ + +#define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \ + pa_hpux_asm_output_external ((FILE), (DECL), (NAME)) +#define ASM_OUTPUT_EXTERNAL_REAL(FILE, DECL, NAME) \ + do { fputs ("\t.IMPORT ", FILE); \ + assemble_name_raw (FILE, NAME); \ + if (FUNCTION_NAME_P (NAME)) \ + fputs (",CODE\n", FILE); \ + else \ + fputs (",DATA\n", FILE); \ + } while (0) + +/* The bogus HP assembler requires ALL external references to be + "imported", even library calls. They look a bit different, so + here's this macro. + + 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. + + We must also ensure that a libcall that has been previously + exported is not subsequently imported since the HP assembler may + change the type from an ENTRY to a CODE symbol. This would make + the symbol local. We are forced to use the identifier node + associated with the real assembler name for this check as the + symbol_ref available in ASM_DECLARE_FUNCTION_NAME is not the + same as the one used here. As a result, we can't use flags + in the symbol_ref for this check. The identifier check assumes + assemble_external_libcall is called before the symbol is used. */ + +#define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, RTL) \ + do { const char *name; \ + tree id; \ + \ + if (!function_label_operand (RTL, VOIDmode)) \ + pa_encode_label (RTL); \ + \ + 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_raw (FILE, XSTR ((RTL), 0)); \ + fputs (",CODE\n", FILE); \ + } \ + } while (0) + +/* 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 + removing the dead (but important) initialization of + REFERENCE. */ + +#define DO_GLOBAL_DTORS_BODY \ +do { \ + extern void __gcc_plt_call (void); \ + void (*reference)(void) = &__gcc_plt_call; \ + func_ptr *p; \ + __asm__ ("" : : "r" (reference)); \ + for (p = __DTOR_LIST__ + 1; *p; ) \ + (*p++) (); \ +} while (0) + +/* This macro specifies the biggest alignment supported by the object + file format of this machine. + + The .align directive in the HP assembler allows alignments up to 4096 + bytes. However, the maximum alignment of a global common symbol is 8 + bytes for objects smaller than the page size (4096 bytes). For larger + objects, the linker provides an alignment of 32 bytes. Unfortunately, + this macro doesn't provide a mechanism to test for common symbols. */ +#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. */ +#undef TARGET_ALWAYS_STRIP_DOTDOT +#define TARGET_ALWAYS_STRIP_DOTDOT true + +/* If GAS supports weak, we can support weak when we have working linker + support for secondary definitions and are generating code for GAS. + This is primarily for one-only support as SOM doesn't allow undefined + weak symbols. */ +#ifdef HAVE_GAS_WEAK +#define TARGET_SUPPORTS_WEAK (TARGET_SOM_SDEF && TARGET_GAS) +#else +#define TARGET_SUPPORTS_WEAK 0 +#endif + +/* CVS GAS as of 4/28/04 supports a comdat parameter for the .nsubspa + directive. This provides one-only linkage semantics even though we + don't have weak support. */ +#ifdef HAVE_GAS_NSUBSPA_COMDAT +#define SUPPORTS_SOM_COMDAT (TARGET_GAS) +#else +#define SUPPORTS_SOM_COMDAT 0 +#endif + +/* We can support one only if we support weak or comdat. */ +#define SUPPORTS_ONE_ONLY (TARGET_SUPPORTS_WEAK || SUPPORTS_SOM_COMDAT) + +/* We use DECL_COMMON for uninitialized one-only variables as we don't + have linkonce .bss. We use SOM secondary definitions or comdat for + initialized variables and functions. */ +#define MAKE_DECL_ONE_ONLY(DECL) \ + do { \ + if (TREE_CODE (DECL) == VAR_DECL \ + && (DECL_INITIAL (DECL) == 0 \ + || DECL_INITIAL (DECL) == error_mark_node)) \ + DECL_COMMON (DECL) = 1; \ + else if (TARGET_SUPPORTS_WEAK) \ + DECL_WEAK (DECL) = 1; \ + } while (0) + +/* 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); \ + targetm.asm_out.globalize_label (FILE, NAME); \ + } while (0) + +/* 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 + +/* Shared library suffix. Collect2 strips the version string after + this suffix when generating constructor/destructor names. */ +#define SHLIB_SUFFIX ".sl" + +#define TARGET_HAVE_NAMED_SECTIONS false + +#define TARGET_ASM_TM_CLONE_TABLE_SECTION pa_som_tm_clone_table_section |