X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=gcc%2Fconfig%2Farm%2Felf.h;h=56f8422ee503629eb0b0f41ae3f84db2e39ba9b8;hb=c54c7322513c602b6a0e108afc3146ce9cc2b8f8;hp=71fe99b2687ef61a2cb6a22f59cd908e15172689;hpb=30506ece757ccb765160740e59a90be165226110;p=gcc.git diff --git a/gcc/config/arm/elf.h b/gcc/config/arm/elf.h index 71fe99b2687..56f8422ee50 100644 --- a/gcc/config/arm/elf.h +++ b/gcc/config/arm/elf.h @@ -1,180 +1,105 @@ /* Definitions of target machine for GNU compiler. For ARM with ELF obj format. - Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001 + Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2004 Free Software Foundation, Inc. Contributed by Philip Blundell and Catherine Moore -This file is part of GNU CC. + This file is part of GCC. -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. + 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 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. + 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 GNU CC; see the file COPYING. If not, write to -the Free Software Foundation, 59 Temple Place - Suite 330, -Boston, MA 02111-1307, USA. */ + You should have received a copy of the GNU General Public License + along with GCC; see the file COPYING. If not, write to + the Free Software Foundation, 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ - -#define OBJECT_FORMAT_ELF +#ifndef OBJECT_FORMAT_ELF + #error elf.h included before elfos.h +#endif #ifndef LOCAL_LABEL_PREFIX #define LOCAL_LABEL_PREFIX "." #endif -#ifndef USER_LABEL_PREFIX -#define USER_LABEL_PREFIX "" -#endif - #ifndef SUBTARGET_CPP_SPEC #define SUBTARGET_CPP_SPEC "-D__ELF__" #endif #ifndef SUBTARGET_EXTRA_SPECS #define SUBTARGET_EXTRA_SPECS \ - { "subtarget_extra_asm_spec", SUBTARGET_EXTRA_ASM_SPEC }, + { "subtarget_extra_asm_spec", SUBTARGET_EXTRA_ASM_SPEC }, \ + { "subtarget_asm_float_spec", SUBTARGET_ASM_FLOAT_SPEC }, #endif #ifndef SUBTARGET_EXTRA_ASM_SPEC #define SUBTARGET_EXTRA_ASM_SPEC "" #endif +#ifndef SUBTARGET_ASM_FLOAT_SPEC +#define SUBTARGET_ASM_FLOAT_SPEC "\ +%{mapcs-float:-mfloat}" +#endif + #ifndef ASM_SPEC #define ASM_SPEC "\ %{mbig-endian:-EB} \ -%{mcpu=*:-m%*} \ -%{march=*:-m%*} \ +%{mlittle-endian:-EL} \ +%{mcpu=*:-mcpu=%*} \ +%{march=*:-march=%*} \ %{mapcs-*:-mapcs-%*} \ -%{mapcs-float:-mfloat} \ -%{msoft-float:-mno-fpu} \ +%(subtarget_asm_float_spec) \ %{mthumb-interwork:-mthumb-interwork} \ +%{msoft-float:-mfloat-abi=soft} %{mhard-float:-mfloat-abi=hard} \ +%{mfloat-abi=*} %{mfpu=*} \ %(subtarget_extra_asm_spec)" #endif -/* The following macro defines the format used to output the second - operand of the .type assembler directive. Different svr4 assemblers - expect various different forms for this operand. The one given here - is just a default. You may need to override it in your machine- - specific tm.h file (depending upon the particulars of your assembler). */ -#define TYPE_OPERAND_FMT "%s" - -/* Write the extra assembler code needed to declare a function's result. - Most svr4 assemblers don't require any special declaration of the - result value, but there are exceptions. */ -#ifndef ASM_DECLARE_RESULT -#define ASM_DECLARE_RESULT(FILE, RESULT) -#endif - -/* These macros generate the special .type and .size directives which - are used to set the corresponding fields of the linker symbol table - entries in an ELF object file under SVR4. These macros also output - the starting labels for the relevant functions/objects. */ -#define TYPE_ASM_OP "\t.type\t" -#define SIZE_ASM_OP "\t.size\t" +/* The ARM uses @ are a comment character so we need to redefine + TYPE_OPERAND_FMT. */ +#undef TYPE_OPERAND_FMT +#define TYPE_OPERAND_FMT "%%%s" -/* Write the extra assembler code needed to declare a function properly. - Some svr4 assemblers need to also have something extra said about the - function's return value. We allow for that here. */ -#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ - do \ - { \ - ARM_DECLARE_FUNCTION_NAME (FILE, NAME, DECL); \ - fprintf (FILE, "%s", TYPE_ASM_OP); \ - assemble_name (FILE, NAME); \ - putc (',', FILE); \ - fprintf (FILE, TYPE_OPERAND_FMT, "function"); \ - putc ('\n', FILE); \ - ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \ - ASM_OUTPUT_LABEL(FILE, NAME); \ - } \ - while (0) - -/* Write the extra assembler code needed to declare an object properly. */ -#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \ +/* We might need a ARM specific header to function declarations. */ +#undef ASM_DECLARE_FUNCTION_NAME +#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ do \ { \ - fprintf (FILE, "%s", TYPE_ASM_OP); \ - assemble_name (FILE, NAME); \ - putc (',', FILE); \ - fprintf (FILE, TYPE_OPERAND_FMT, "object"); \ - putc ('\n', FILE); \ - size_directive_output = 0; \ - if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \ - { \ - size_directive_output = 1; \ - fprintf (FILE, "%s", SIZE_ASM_OP); \ - assemble_name (FILE, NAME); \ - putc (',', FILE); \ - fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, \ - int_size_in_bytes (TREE_TYPE (DECL))); \ - fputc ('\n', FILE); \ - } \ + ARM_DECLARE_FUNCTION_NAME (FILE, NAME, DECL); \ + ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function"); \ + ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \ ASM_OUTPUT_LABEL(FILE, NAME); \ } \ while (0) -/* Output the size directive for a decl in rest_of_decl_compilation - in the case where we did not do so before the initializer. - Once we find the error_mark_node, we know that the value of - size_directive_output was set - by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */ -#define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \ - do \ - { \ - const char * name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \ - if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \ - && ! AT_END && TOP_LEVEL \ - && DECL_INITIAL (DECL) == error_mark_node \ - && !size_directive_output) \ - { \ - size_directive_output = 1; \ - fprintf (FILE, "%s", SIZE_ASM_OP); \ - assemble_name (FILE, name); \ - putc (',', FILE); \ - fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, \ - int_size_in_bytes (TREE_TYPE (DECL))); \ - fputc ('\n', FILE); \ - } \ - } \ - while (0) - -/* This is how to declare the size of a function. */ +/* We might need an ARM specific trailer for function declarations. */ +#undef ASM_DECLARE_FUNCTION_SIZE #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \ do \ { \ ARM_DECLARE_FUNCTION_SIZE (FILE, FNAME, DECL); \ if (!flag_inhibit_size_directive) \ - { \ - char label[256]; \ - static int labelno; \ - labelno ++; \ - ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno); \ - ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno); \ - fprintf (FILE, "%s", SIZE_ASM_OP); \ - assemble_name (FILE, (FNAME)); \ - fprintf (FILE, ","); \ - assemble_name (FILE, label); \ - fprintf (FILE, "-"); \ - assemble_name (FILE, (FNAME)); \ - putc ('\n', FILE); \ - } \ + ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME); \ } \ while (0) /* Define this macro if jump tables (for `tablejump' insns) should be output in the text section, along with the assembler instructions. Otherwise, the readonly data section is used. */ -#define JUMP_TABLES_IN_TEXT_SECTION 1 +/* We put ARM jump tables in the text section, because it makes the code + more efficient, but for Thumb it's better to put them out of band. */ +#define JUMP_TABLES_IN_TEXT_SECTION (TARGET_ARM) #ifndef LINK_SPEC -#define LINK_SPEC "%{mbig-endian:-EB} -X" +#define LINK_SPEC "%{mbig-endian:-EB} %{mlittle-endian:-EL} -X" #endif /* Run-time Target Specification. */ @@ -183,200 +108,21 @@ Boston, MA 02111-1307, USA. */ #endif #ifndef TARGET_DEFAULT -#define TARGET_DEFAULT (ARM_FLAG_SOFT_FLOAT | ARM_FLAG_APCS_32 | ARM_FLAG_APCS_FRAME) +#define TARGET_DEFAULT (MASK_APCS_FRAME) #endif #ifndef MULTILIB_DEFAULTS #define MULTILIB_DEFAULTS \ - { "marm", "mlittle-endian", "msoft-float", "mapcs-32", "mno-thumb-interwork", "fno-leading-underscore" } + { "marm", "mlittle-endian", "msoft-float", "mno-thumb-interwork", "fno-leading-underscore" } #endif - -/* A C expression whose value is nonzero if IDENTIFIER with arguments ARGS - is a valid machine specific attribute for DECL. - The attributes in ATTRIBUTES have previously been assigned to DECL. */ -#define VALID_MACHINE_DECL_ATTRIBUTE(DECL, ATTRIBUTES, IDENTIFIER, ARGS) \ - arm_valid_machine_decl_attribute (DECL, IDENTIFIER, ARGS) - -/* This outputs a lot of .req's to define alias for various registers. - Let's try to avoid this. */ -#ifndef ASM_FILE_START -#define ASM_FILE_START(STREAM) \ - do \ - { \ - fprintf (STREAM, "%s Generated by gcc %s for ARM/elf\n", \ - ASM_COMMENT_START, version_string); \ - output_file_directive (STREAM, main_input_filename); \ - fprintf (STREAM, ASM_APP_OFF); \ - } \ - while (0) -#endif - -/* Output an internal label definition. */ -#ifndef ASM_OUTPUT_INTERNAL_LABEL -#define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) \ - do \ - { \ - char * s = (char *) alloca (40 + strlen (PREFIX)); \ - extern int arm_target_label, arm_ccfsm_state; \ - extern rtx arm_target_insn; \ - \ - if (arm_ccfsm_state == 3 && arm_target_label == (NUM) \ - && !strcmp (PREFIX, "L")) \ - { \ - arm_ccfsm_state = 0; \ - arm_target_insn = NULL; \ - } \ - ASM_GENERATE_INTERNAL_LABEL (s, (PREFIX), (NUM)); \ - ASM_OUTPUT_LABEL (STREAM, s); \ - } \ - while (0) -#endif - -/* Support the ctors/dtors and other sections. */ - -/* Define the pseudo-ops used to switch to the .ctors and .dtors sections. - - Note that we want to give these sections the SHF_WRITE attribute - because these sections will actually contain data (i.e. tables of - addresses of functions in the current root executable or shared library - file) and, in the case of a shared library, the relocatable addresses - will have to be properly resolved/relocated (and then written into) by - the dynamic linker when it actually attaches the given shared library - to the executing process. (Note that on SVR4, you may wish to use the - `-z text' option to the ELF linker, when building a shared library, as - an additional check that you are doing everything right. But if you do - use the `-z text' option when building a shared library, you will get - errors unless the .ctors and .dtors sections are marked as writable - via the SHF_WRITE attribute.) */ -#ifndef CTORS_SECTION_ASM_OP -#define CTORS_SECTION_ASM_OP "\t.section\t.ctors,\"aw\"" -#endif - -#ifndef DTORS_SECTION_ASM_OP -#define DTORS_SECTION_ASM_OP "\t.section\t.dtors,\"aw\"" -#endif - -/* A list of other sections which the compiler might be "in" at any - given time. */ -#ifndef SUBTARGET_EXTRA_SECTIONS -#define SUBTARGET_EXTRA_SECTIONS -#endif - -#ifndef EXTRA_SECTIONS -#define EXTRA_SECTIONS SUBTARGET_EXTRA_SECTIONS in_ctors, in_dtors -#endif - -/* A list of extra section function definitions. */ -#ifndef SUBTARGET_EXTRA_SECTION_FUNCTIONS -#define SUBTARGET_EXTRA_SECTION_FUNCTIONS -#endif - -#ifndef EXTRA_SECTION_FUNCTIONS -#define EXTRA_SECTION_FUNCTIONS \ - SUBTARGET_EXTRA_SECTION_FUNCTIONS \ - CTORS_SECTION_FUNCTION \ - DTORS_SECTION_FUNCTION -#endif - -#ifndef CTORS_SECTION_FUNCTION -#define CTORS_SECTION_FUNCTION \ -void \ -ctors_section () \ -{ \ - if (in_section != in_ctors) \ - { \ - fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP); \ - in_section = in_ctors; \ - } \ -} -#endif - -#ifndef DTORS_SECTION_FUNCTION -#define DTORS_SECTION_FUNCTION \ -void \ -dtors_section () \ -{ \ - if (in_section != in_dtors) \ - { \ - fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP); \ - in_section = in_dtors; \ - } \ -} -#endif - -/* A C statement to output something to the assembler file to switch to - section NAME for object DECL which is either a FUNCTION_DECL, a VAR_DECL - or NULL_TREE. */ -#undef ASM_OUTPUT_SECTION_NAME -#define ASM_OUTPUT_SECTION_NAME(STREAM, DECL, NAME, RELOC) \ - do \ - { \ - if ((DECL) && TREE_CODE (DECL) == FUNCTION_DECL) \ - fprintf (STREAM, "\t.section %s,\"ax\",%%progbits\n", NAME); \ - else if ((DECL) && DECL_READONLY_SECTION (DECL, RELOC)) \ - fprintf (STREAM, "\t.section %s,\"a\"\n", NAME); \ - else if (! strncmp (NAME, ".bss", 4)) \ - fprintf (STREAM, "\t.section %s,\"aw\",%%nobits\n", NAME); \ - else \ - fprintf (STREAM, "\t.section %s,\"aw\"\n", NAME); \ - } \ - while (0) +#define TARGET_ASM_FILE_START_APP_OFF true +#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true -/* Support the ctors/dtors sections for g++. */ -#ifndef INT_ASM_OP -#define INT_ASM_OP "\t.word\t" -#endif - -/* A C statement (sans semicolon) to output an element in the table of - global constructors. */ -#ifndef ASM_OUTPUT_CONSTRUCTOR -#define ASM_OUTPUT_CONSTRUCTOR(STREAM, NAME) \ - do \ - { \ - ctors_section (); \ - fprintf (STREAM, "%s", INT_ASM_OP); \ - assemble_name (STREAM, NAME); \ - fprintf (STREAM, "\n"); \ - } \ - while (0) -#endif - -/* A C statement (sans semicolon) to output an element in the table of - global destructors. */ -#ifndef ASM_OUTPUT_DESTRUCTOR -#define ASM_OUTPUT_DESTRUCTOR(STREAM, NAME) \ - do \ - { \ - dtors_section (); \ - fprintf (STREAM, "%s", INT_ASM_OP); \ - assemble_name (STREAM, NAME); \ - fprintf (STREAM, "\n"); \ - } \ - while (0) -#endif -/* 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) - -#ifndef ASM_OUTPUT_ALIGNED_COMMON -#define ASM_OUTPUT_ALIGNED_COMMON(STREAM, NAME, SIZE, ALIGN) \ - do \ - { \ - fprintf (STREAM, "\t.comm\t"); \ - assemble_name (STREAM, NAME); \ - fprintf (STREAM, ", %d, %d\n", SIZE, ALIGN); \ - } \ - while (0) -#endif +/* Output an element in the static constructor array. */ +#undef TARGET_ASM_CONSTRUCTOR +#define TARGET_ASM_CONSTRUCTOR arm_elf_asm_constructor /* For PIC code we need to explicitly specify (PLT) and (GOT) relocs. */ #define NEED_PLT_RELOC flag_pic @@ -401,4 +147,5 @@ dtors_section () \ } \ while (0) -#include "aout.h" +/* The EABI doesn't provide a way of implementing init_priority. */ +#define SUPPORTS_INIT_PRIORITY (!TARGET_AAPCS_BASED)