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Diffstat (limited to 'gcc_arm/config/arm/linux-elf.h')
| -rwxr-xr-x | gcc_arm/config/arm/linux-elf.h | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/gcc_arm/config/arm/linux-elf.h b/gcc_arm/config/arm/linux-elf.h new file mode 100755 index 0000000..d906093 --- /dev/null +++ b/gcc_arm/config/arm/linux-elf.h @@ -0,0 +1,204 @@ +/* Definitions for ARM running Linux-based GNU systems using ELF + Copyright (C) 1993, 1994, 1997, 1998 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 + +/* Now we define the strings used to build the spec file. */ +#define LIB_SPEC "%{!shared:%{!symbolic:-lc}}" + +/* Add the compiler's crtend, and the library's crtn. */ +#define ENDFILE_SPEC "%{!shared:crtend.o%s} %{shared:crtendS.o%s} \ + %{pg:gcrtn.o%s}%{!pg:crtn.o%s}" + +#define STARTFILE_SPEC "%{!shared:crt1.o%s} \ + crti.o%s \ + %{!shared:crtbegin.o%s} %{shared:crtbeginS.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 +#undef CPP_APCS_PC_DEFAULT_SPEC +#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 { \ + 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) + +#include "arm/elf.h" +#include "arm/linux-gas.h" |