/* Definitions of target machine for GNU compiler.
For ARM with ELF obj format.
- Copyright (C) 1995 - 1999 Free Software Foundation, Inc.
+ Copyright (C) 1995-2022 Free Software Foundation, Inc.
Contributed by Philip Blundell <philb@gnu.org> and
Catherine Moore <clm@cygnus.com>
-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 3, 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. */
+ Under Section 7 of GPL version 3, you are granted additional
+ permissions described in the GCC Runtime Library Exception, version
+ 3.1, as published by the Free Software Foundation.
+ You should have received a copy of the GNU General Public License and
+ a copy of the GCC Runtime Library Exception along with this program;
+ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+ <http://www.gnu.org/licenses/>. */
-#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_asm_float_spec", SUBTARGET_ASM_FLOAT_SPEC }, \
+ SUBSUBTARGET_EXTRA_SPECS
+#endif
+
#ifndef SUBTARGET_EXTRA_ASM_SPEC
-#define SUBTARGET_EXTRA_ASM_SPEC
+#define SUBTARGET_EXTRA_ASM_SPEC ""
#endif
+#ifndef SUBTARGET_ASM_FLOAT_SPEC
+#define SUBTARGET_ASM_FLOAT_SPEC "\
+%{mapcs-float:-mfloat}"
+#endif
+
+#undef SUBSUBTARGET_EXTRA_SPECS
+#define SUBSUBTARGET_EXTRA_SPECS
+
#ifndef ASM_SPEC
#define ASM_SPEC "\
%{mbig-endian:-EB} \
-%{mcpu=*:-m%*} \
-%{march=*:-m%*} \
+%{mlittle-endian:-EL} \
+%(asm_cpu_spec) \
%{mapcs-*:-mapcs-%*} \
-%{mapcs-float:-mfloat} \
-%{msoft-float:-mno-fpu} \
+%(subtarget_asm_float_spec) \
%{mthumb-interwork:-mthumb-interwork} \
-" SUBTARGET_EXTRA_ASM_SPEC
+%{mfloat-abi=*} %{!mfpu=auto: %{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
+/* The ARM uses @ are a comment character so we need to redefine
+ TYPE_OPERAND_FMT. */
+#undef TYPE_OPERAND_FMT
+#define TYPE_OPERAND_FMT "%%%s"
-/* 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 ".type"
-#define SIZE_ASM_OP ".size"
+/* We might need a ARM specific header to function declarations. */
+#undef ASM_DECLARE_FUNCTION_NAME
+#define ASM_DECLARE_FUNCTION_NAME arm_asm_declare_function_name
-/* 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, "\t%s\t ", 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) \
- do \
- { \
- fprintf (FILE, "\t%s\t ", 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, "\t%s\t ", 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); \
- } \
- 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, "\t%s\t ", 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); \
+ ARM_OUTPUT_FN_UNWIND (FILE, FALSE); \
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, "\t%s\t ", 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 and Thumb-2 jump tables in the text section, because it makes
+ the code more efficient, but for Thumb-1 it's better to put them out of
+ band unless we are generating compressed tables. */
+#define JUMP_TABLES_IN_TEXT_SECTION \
+ ((TARGET_32BIT || (TARGET_THUMB && (optimize_size || flag_pic))) \
+ && !target_pure_code)
#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. */
-#ifndef TARGET_VERSION
-#define TARGET_VERSION fputs (" (ARM/elf)", stderr)
-#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" }
-#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)
\f
-
-/* A C statement to output assembler commands which will identify the
- object file as having been compiled with GNU CC (or another GNU
- compiler). */
-/* Define this to NULL so we don't get anything.
- We have ASM_IDENTIFY_LANGUAGE.
- Also, when using stabs, gcc2_compiled must be a stabs entry, not an
- ordinary symbol, or gdb won't see it. The stabs entry must be
- before the N_SO in order for gdb to find it. */
-#ifndef ASM_IDENTIFY_GCC
-#define ASM_IDENTIFY_GCC(STREAM) \
- fprintf (STREAM, "%sgcc2_compiled.:\n", LOCAL_LABEL_PREFIX )
-#endif
-
-/* 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
-\f
-/* 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_FILE_DIRECTIVE true
\f
-/* Support the ctors/dtors sections for g++. */
-#ifndef INT_ASM_OP
-#define INT_ASM_OP ".word"
-#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, "\t%s\t ", 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, "\t%s\t ", INT_ASM_OP); \
- assemble_name (STREAM, NAME); \
- fprintf (STREAM, "\n"); \
- } \
- while (0)
-#endif
+/* Output an element in the static constructor array. */
+#undef TARGET_ASM_CONSTRUCTOR
+#define TARGET_ASM_CONSTRUCTOR arm_elf_asm_constructor
-/* 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)
+#undef TARGET_ASM_DESTRUCTOR
+#define TARGET_ASM_DESTRUCTOR arm_elf_asm_destructor
/* For PIC code we need to explicitly specify (PLT) and (GOT) relocs. */
#define NEED_PLT_RELOC flag_pic
/* The ELF assembler handles GOT addressing differently to NetBSD. */
#define GOT_PCREL 0
-/* Biggest alignment supported by the object file format of this
- machine. Use this macro to limit the alignment which can be
- specified using the `__attribute__ ((aligned (N)))' construct. If
- not defined, the default value is `BIGGEST_ALIGNMENT'. */
-#define MAX_OFILE_ALIGNMENT (32768 * 8)
-
/* Align output to a power of two. Note ".align 0" is redundant,
and also GAS will treat it as ".align 2" which we do not want. */
#define ASM_OUTPUT_ALIGN(STREAM, POWER) \
} \
while (0)
-#include "aout.h"
+/* Horrible hack: We want to prevent some libgcc routines being included
+ for some multilibs. The condition should match the one in
+ libgcc/config/arm/lib1funcs.S and libgcc/config/arm/t-elf. */
+#if __ARM_ARCH_ISA_ARM || __ARM_ARCH_ISA_THUMB != 1
+#undef L_fixdfsi
+#undef L_fixunsdfsi
+#undef L_truncdfsf2
+#undef L_fixsfsi
+#undef L_fixunssfsi
+#undef L_floatdidf
+#undef L_floatdisf
+#undef L_floatundidf
+#undef L_floatundisf
+#endif
+
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