| /* Definitions for ARM running Linux-based GNU systems using ELF |
| Copyright (C) 1993, 1994, 1997, 1998, 1999 Free Software Foundation, Inc. |
| Contributed by Philip Blundell <philb@gnu.org> |
| |
| This file is part of GNU CC. |
| |
| GNU CC 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 2, or (at your option) |
| any later version. |
| |
| GNU CC 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 this program; see the file COPYING. If not, write to |
| the Free Software Foundation, 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| /* Run-time Target Specification. */ |
| #define TARGET_VERSION fputs (" (ARM GNU/Linux with ELF)", stderr); |
| |
| /* We have libgcc2. */ |
| #define HAVE_ATEXIT |
| |
| /* Default is to use APCS-32 mode. */ |
| #ifndef SUBTARGET_DEFAULT_APCS26 |
| #define TARGET_DEFAULT (ARM_FLAG_APCS_32 | ARM_FLAG_SHORT_BYTE) |
| #define SUBTARGET_EXTRA_LINK_SPEC \ |
| " %{mapcs-26:-m elf32arm26} %{!mapcs-26:-m elf32arm}" |
| #define SUBTARGET_EXTRA_ASM_SPEC \ |
| " %{mapcs-26:-mapcs-26} %(!mapcs-26:-mapcs-32}" |
| #endif |
| |
| /* This was defined in linux.h. Define it here also. */ |
| #undef DEFAULT_VTABLE_THUNKS |
| #define DEFAULT_VTABLE_THUNKS 1 |
| |
| /* Handle #pragma weak and #pragma pack. */ |
| #define HANDLE_SYSV_PRAGMA |
| |
| /* Now we define the strings used to build the spec file. */ |
| #define LIB_SPEC \ |
| "%{shared: -lc} \ |
| %{!shared: %{pthread:-lpthread} \ |
| %{profile:-lc_p} %{!profile: -lc}}" |
| |
| #define LIBGCC_SPEC "%{msoft-float:-lfloat} -lgcc" |
| |
| /* Provide a STARTFILE_SPEC appropriate for GNU/Linux. Here we add |
| the GNU/Linux magical crtbegin.o file (see crtstuff.c) which |
| provides part of the support for getting C++ file-scope static |
| object constructed before entering `main'. */ |
| |
| #define STARTFILE_SPEC \ |
| "%{!shared: \ |
| %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \ |
| %{!p:%{profile:gcrt1.o%s} \ |
| %{!profile:crt1.o%s}}}} \ |
| crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}" |
| |
| /* Provide a ENDFILE_SPEC appropriate for GNU/Linux. Here we tack on |
| the GNU/Linux magical crtend.o file (see crtstuff.c) which |
| provides part of the support for getting C++ file-scope static |
| object constructed before entering `main', followed by a normal |
| GNU/Linux "finalizer" file, `crtn.o'. */ |
| |
| #define ENDFILE_SPEC \ |
| "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s" |
| |
| #define LINK_SPEC "%{h*} %{version:-v} \ |
| %{b} %{Wl,*:%*} \ |
| %{static:-Bstatic} \ |
| %{shared:-shared} \ |
| %{symbolic:-Bsymbolic} \ |
| %{rdynamic:-export-dynamic} \ |
| %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2} \ |
| -X \ |
| %{mbig-endian:-EB}" \ |
| SUBTARGET_EXTRA_LINK_SPEC |
| |
| #undef CPP_PREDEFINES |
| #define CPP_PREDEFINES \ |
| "-Dunix -Darm -Dlinux -Asystem(unix) -Asystem(posix) -Acpu(arm) \ |
| -Amachine(arm) -D__ELF__ -Darm_elf" |
| |
| #ifndef SUBTARGET_DEFAULT_APCS26 |
| #define CPP_APCS_PC_DEFAULT_SPEC "-D__APCS_32__" |
| #endif |
| |
| /* Allow #sccs in preprocessor. */ |
| #define SCCS_DIRECTIVE |
| |
| #define USER_LABEL_PREFIX "" /* For ELF the default is no underscores */ |
| #define LOCAL_LABEL_PREFIX "." |
| |
| /* Attach a special .ident directive to the end of the file to identify |
| the version of GCC which compiled this code. */ |
| #define IDENT_ASM_OP ".ident" |
| |
| /* Output #ident as a .ident. */ |
| #define ASM_OUTPUT_IDENT(FILE, NAME) \ |
| fprintf (FILE, "\t%s\t\"%s\"\n", IDENT_ASM_OP, NAME); |
| |
| #ifdef IDENTIFY_WITH_IDENT |
| #define ASM_IDENTIFY_GCC(FILE) /* nothing */ |
| #define ASM_IDENTIFY_LANGUAGE(FILE) \ |
| fprintf (FILE, "\t%s \"GCC (%s) %s\"\n", IDENT_ASM_OP, \ |
| lang_identify (), version_string) |
| #else |
| #define ASM_FILE_END(FILE) \ |
| do { \ |
| if (!flag_no_ident) \ |
| fprintf ((FILE), "\t%s\t\"GCC: (GNU) %s\"\n", \ |
| IDENT_ASM_OP, version_string); \ |
| } while (0) |
| #endif |
| |
| /* Support const sections and the ctors and dtors sections for g++. |
| Note that there appears to be two different ways to support const |
| sections at the moment. You can either #define the symbol |
| READONLY_DATA_SECTION (giving it some code which switches to the |
| readonly data section) or else you can #define the symbols |
| EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and |
| SELECT_RTX_SECTION. We do both here just to be on the safe side. */ |
| #define USE_CONST_SECTION 1 |
| |
| /* Support for Constructors and Destructors. */ |
| #define READONLY_DATA_SECTION() const_section () |
| |
| /* A default list of other sections which we might be "in" at any given |
| time. For targets that use additional sections (e.g. .tdesc) you |
| should override this definition in the target-specific file which |
| includes this file. */ |
| #define SUBTARGET_EXTRA_SECTIONS in_const, |
| |
| /* A default list of extra section function definitions. For targets |
| that use additional sections (e.g. .tdesc) you should override this |
| definition in the target-specific file which includes this file. */ |
| #define SUBTARGET_EXTRA_SECTION_FUNCTIONS CONST_SECTION_FUNCTION |
| |
| extern void text_section (); |
| |
| #define CONST_SECTION_ASM_OP ".section\t.rodata" |
| |
| #define CONST_SECTION_FUNCTION \ |
| void \ |
| const_section () \ |
| { \ |
| if (!USE_CONST_SECTION) \ |
| text_section (); \ |
| else if (in_section != in_const) \ |
| { \ |
| fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP); \ |
| in_section = in_const; \ |
| } \ |
| } |
| |
| /* 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) \ |
| fprintf (FILE, ".section\t%s,\"%s\",%%progbits\n", NAME, \ |
| (DECL) && TREE_CODE (DECL) == FUNCTION_DECL ? "ax" : \ |
| (DECL) && DECL_READONLY_SECTION (DECL, RELOC) ? "a" : "aw") |
| |
| /* A C statement or statements to switch to the appropriate |
| section for output of DECL. DECL is either a `VAR_DECL' node |
| or a constant of some sort. RELOC indicates whether forming |
| the initial value of DECL requires link-time relocations. */ |
| #define SELECT_SECTION(DECL,RELOC) \ |
| { \ |
| if (TREE_CODE (DECL) == STRING_CST) \ |
| { \ |
| if (! flag_writable_strings) \ |
| const_section (); \ |
| else \ |
| data_section (); \ |
| } \ |
| else if (TREE_CODE (DECL) == VAR_DECL) \ |
| { \ |
| if ((flag_pic && RELOC) \ |
| || !TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL) \ |
| || !DECL_INITIAL (DECL) \ |
| || (DECL_INITIAL (DECL) != error_mark_node \ |
| && !TREE_CONSTANT (DECL_INITIAL (DECL)))) \ |
| data_section (); \ |
| else \ |
| const_section (); \ |
| } \ |
| else \ |
| const_section (); \ |
| } |
| |
| /* A C statement or statements to switch to the appropriate |
| section for output of RTX in mode MODE. RTX is some kind |
| of constant in RTL. The argument MODE is redundant except |
| in the case of a `const_int' rtx. Currently, these always |
| go into the const section. */ |
| #define SELECT_RTX_SECTION(MODE,RTX) const_section () |
| |
| /* On svr4, we *do* have support for the .init and .fini sections, and we |
| can put stuff in there to be executed before and after `main'. We let |
| crtstuff.c and other files know this by defining the following symbols. |
| The definitions say how to change sections to the .init and .fini |
| sections. This is the same for all known svr4 assemblers. */ |
| #define INIT_SECTION_ASM_OP ".section\t.init" |
| #define FINI_SECTION_ASM_OP ".section\t.fini" |
| |
| |
| /* This is how we tell the assembler that a symbol is weak. */ |
| #define ASM_WEAKEN_LABEL(FILE,NAME) \ |
| do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \ |
| fputc ('\n', FILE); } while (0) |
| |
| /* This is how we tell the assembler that two symbols have the same value. */ |
| |
| #define ASM_OUTPUT_DEF(FILE,NAME1,NAME2) \ |
| do { assemble_name (FILE, NAME1); \ |
| fputs (" = ", FILE); \ |
| assemble_name (FILE, NAME2); \ |
| fputc ('\n', FILE); } while (0) |
| |
| /* Make DWARF2 an option, but keep DBX as the default for now. |
| Use -gdwarf-2 to turn on DWARF2. */ |
| #define DWARF2_DEBUGGING_INFO |
| #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG |
| |
| /* Get the standard ELF stabs definitions. */ |
| #include "dbxelf.h" |
| |
| #include "arm/elf.h" |
| #include "arm/linux-gas.h" |
| |
| #ifndef SUBTARGET_DEFAULT_APCS26 |
| /* On 32-bit machine it is always safe to assume we have the "new" |
| floating point system. |
| ?? Make this happen for all targets when NWFPE is better established. */ |
| #undef FP_DEFAULT |
| #define FP_DEFAULT FP_SOFT3 |
| #endif |
