706 lines
25 KiB
C
706 lines
25 KiB
C
/* elfos.h -- operating system specific defines to be used when
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targeting GCC for some generic ELF system
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Copyright (C) 1991, 1994, 1995, 1999, 2000 Free Software Foundation, Inc.
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Based on svr4.h contributed by Ron Guilmette (rfg@netcom.com).
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* For the sake of libgcc2.c, indicate target supports atexit. */
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#define HAVE_ATEXIT
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#undef ENDFILE_SPEC
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#define ENDFILE_SPEC "crtend.o%s"
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#undef STARTFILE_SPEC
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#define STARTFILE_SPEC "%{!shared: \
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%{!symbolic: \
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%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}}\
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crtbegin.o%s"
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/* Attach a special .ident directive to the end of the file to identify
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the version of GCC which compiled this code. The format of the
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.ident string is patterned after the ones produced by native svr4
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C compilers. */
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#define IDENT_ASM_OP ".ident"
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#define ASM_FILE_END(FILE) \
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do { \
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if (!flag_no_ident) \
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fprintf ((FILE), "\t%s\t\"GCC: (GNU) %s\"\n", \
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IDENT_ASM_OP, version_string); \
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} while (0)
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/* Output #ident as a .ident. */
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#define ASM_OUTPUT_IDENT(FILE, NAME) \
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fprintf (FILE, "\t%s\t\"%s\"\n", IDENT_ASM_OP, NAME);
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/* Use periods rather than dollar signs in special g++ assembler names. */
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#define NO_DOLLAR_IN_LABEL
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/* Writing `int' for a bitfield forces int alignment for the structure. */
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#define PCC_BITFIELD_TYPE_MATTERS 1
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/* Implicit library calls should use memcpy, not bcopy, etc. */
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#define TARGET_MEM_FUNCTIONS
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/* Handle #pragma weak and #pragma pack. */
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#define HANDLE_SYSV_PRAGMA
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/* System V Release 4 uses DWARF debugging info. */
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#define DWARF_DEBUGGING_INFO
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/* All ELF targets can support DWARF-2. */
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#define DWARF2_DEBUGGING_INFO
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/* Also allow them to support STABS debugging. */
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#include "dbxelf.h"
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/* The GNU tools operate better with stabs. Since we don't have
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any native tools to be compatible with, default to stabs. */
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#ifndef PREFERRED_DEBUGGING_TYPE
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#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
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#endif
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#undef ASM_BYTE_OP
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#define ASM_BYTE_OP ".byte"
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#undef SET_ASM_OP
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#define SET_ASM_OP ".set"
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/* This is how to begin an assembly language file. Most svr4 assemblers want
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at least a .file directive to come first, and some want to see a .version
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directive come right after that. Here we just establish a default
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which generates only the .file directive. If you need a .version
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directive for any specific target, you should override this definition
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in the target-specific file which includes this one. */
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#undef ASM_FILE_START
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#define ASM_FILE_START(FILE) \
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output_file_directive ((FILE), main_input_filename)
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/* This is how to allocate empty space in some section. The .zero
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pseudo-op is used for this on most svr4 assemblers. */
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#define SKIP_ASM_OP ".zero"
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#undef ASM_OUTPUT_SKIP
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#define ASM_OUTPUT_SKIP(FILE,SIZE) \
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fprintf (FILE, "\t%s\t%u\n", SKIP_ASM_OP, (SIZE))
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/* This is how to output a reference to a user-level label named NAME.
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`assemble_name' uses this.
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For System V Release 4 the convention is *not* to prepend a leading
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underscore onto user-level symbol names. */
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#undef ASM_OUTPUT_LABELREF
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#define ASM_OUTPUT_LABELREF(FILE,NAME) fprintf (FILE, "%s", NAME)
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/* This is how to output an internal numbered label where
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PREFIX is the class of label and NUM is the number within the class.
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For most svr4 systems, the convention is that any symbol which begins
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with a period is not put into the linker symbol table by the assembler. */
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#undef ASM_OUTPUT_INTERNAL_LABEL
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#define ASM_OUTPUT_INTERNAL_LABEL(FILE, PREFIX, NUM) \
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do { \
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fprintf (FILE, ".%s%d:\n", PREFIX, NUM); \
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} while (0)
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/* This is how to store into the string LABEL
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the symbol_ref name of an internal numbered label where
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PREFIX is the class of label and NUM is the number within the class.
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This is suitable for output with `assemble_name'.
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For most svr4 systems, the convention is that any symbol which begins
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with a period is not put into the linker symbol table by the assembler. */
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#undef ASM_GENERATE_INTERNAL_LABEL
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#define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
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do { \
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sprintf (LABEL, "*.%s%d", PREFIX, NUM); \
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} while (0)
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/* Output the label which precedes a jumptable. Note that for all svr4
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systems where we actually generate jumptables (which is to say every
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svr4 target except i386, where we use casesi instead) we put the jump-
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tables into the .rodata section and since other stuff could have been
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put into the .rodata section prior to any given jumptable, we have to
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make sure that the location counter for the .rodata section gets pro-
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perly re-aligned prior to the actual beginning of the jump table. */
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#define ALIGN_ASM_OP ".align"
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#ifndef ASM_OUTPUT_BEFORE_CASE_LABEL
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#define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \
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ASM_OUTPUT_ALIGN ((FILE), 2);
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#endif
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#undef ASM_OUTPUT_CASE_LABEL
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#define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,JUMPTABLE) \
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do { \
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ASM_OUTPUT_BEFORE_CASE_LABEL (FILE, PREFIX, NUM, JUMPTABLE) \
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ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); \
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} while (0)
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/* The standard SVR4 assembler seems to require that certain builtin
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library routines (e.g. .udiv) be explicitly declared as .globl
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in each assembly file where they are referenced. */
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#define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
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ASM_GLOBALIZE_LABEL (FILE, XSTR (FUN, 0))
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/* This says how to output assembler code to declare an
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uninitialized external linkage data object. Under SVR4,
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the linker seems to want the alignment of data objects
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to depend on their types. We do exactly that here. */
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#define COMMON_ASM_OP ".comm"
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#undef ASM_OUTPUT_ALIGNED_COMMON
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#define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
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do { \
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fprintf ((FILE), "\t%s\t", COMMON_ASM_OP); \
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assemble_name ((FILE), (NAME)); \
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fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT); \
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} while (0)
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/* This says how to output assembler code to declare an
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uninitialized internal linkage data object. Under SVR4,
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the linker seems to want the alignment of data objects
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to depend on their types. We do exactly that here. */
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#define LOCAL_ASM_OP ".local"
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#undef ASM_OUTPUT_ALIGNED_LOCAL
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#define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
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do { \
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fprintf ((FILE), "\t%s\t", LOCAL_ASM_OP); \
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assemble_name ((FILE), (NAME)); \
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fprintf ((FILE), "\n"); \
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ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN); \
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} while (0)
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/* This is the pseudo-op used to generate a 32-bit word of data with a
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specific value in some section. This is the same for all known svr4
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assemblers. */
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#define INT_ASM_OP ".long"
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/* This is the pseudo-op used to generate a contiguous sequence of byte
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values from a double-quoted string WITHOUT HAVING A TERMINATING NUL
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AUTOMATICALLY APPENDED. This is the same for most svr4 assemblers. */
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#undef ASCII_DATA_ASM_OP
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#define ASCII_DATA_ASM_OP ".ascii"
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/* Support const sections and the ctors and dtors sections for g++.
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Note that there appears to be two different ways to support const
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sections at the moment. You can either #define the symbol
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READONLY_DATA_SECTION (giving it some code which switches to the
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readonly data section) or else you can #define the symbols
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EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and
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SELECT_RTX_SECTION. We do both here just to be on the safe side. */
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#define USE_CONST_SECTION 1
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#define CONST_SECTION_ASM_OP ".section\t.rodata"
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/* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
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Note that we want to give these sections the SHF_WRITE attribute
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because these sections will actually contain data (i.e. tables of
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addresses of functions in the current root executable or shared library
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file) and, in the case of a shared library, the relocatable addresses
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will have to be properly resolved/relocated (and then written into) by
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the dynamic linker when it actually attaches the given shared library
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to the executing process. (Note that on SVR4, you may wish to use the
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`-z text' option to the ELF linker, when building a shared library, as
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an additional check that you are doing everything right. But if you do
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use the `-z text' option when building a shared library, you will get
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errors unless the .ctors and .dtors sections are marked as writable
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via the SHF_WRITE attribute.) */
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#define CTORS_SECTION_ASM_OP ".section\t.ctors,\"aw\""
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#define DTORS_SECTION_ASM_OP ".section\t.dtors,\"aw\""
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/* On svr4, we *do* have support for the .init and .fini sections, and we
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can put stuff in there to be executed before and after `main'. We let
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crtstuff.c and other files know this by defining the following symbols.
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The definitions say how to change sections to the .init and .fini
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sections. This is the same for all known svr4 assemblers. */
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#define INIT_SECTION_ASM_OP ".section\t.init"
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#define FINI_SECTION_ASM_OP ".section\t.fini"
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/* A default list of other sections which we might be "in" at any given
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time. For targets that use additional sections (e.g. .tdesc) you
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should override this definition in the target-specific file which
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includes this file. */
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#undef EXTRA_SECTIONS
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#define EXTRA_SECTIONS in_const, in_ctors, in_dtors
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/* A default list of extra section function definitions. For targets
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that use additional sections (e.g. .tdesc) you should override this
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definition in the target-specific file which includes this file. */
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#undef EXTRA_SECTION_FUNCTIONS
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#define EXTRA_SECTION_FUNCTIONS \
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CONST_SECTION_FUNCTION \
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CTORS_SECTION_FUNCTION \
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DTORS_SECTION_FUNCTION
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#define READONLY_DATA_SECTION() const_section ()
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extern void text_section ();
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#define CONST_SECTION_FUNCTION \
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void \
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const_section () \
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{ \
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if (!USE_CONST_SECTION) \
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text_section(); \
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else if (in_section != in_const) \
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{ \
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fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP); \
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in_section = in_const; \
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} \
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}
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#define CTORS_SECTION_FUNCTION \
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void \
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ctors_section () \
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{ \
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if (in_section != in_ctors) \
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{ \
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fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP); \
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in_section = in_ctors; \
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} \
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}
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#define DTORS_SECTION_FUNCTION \
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void \
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dtors_section () \
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{ \
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if (in_section != in_dtors) \
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{ \
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fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP); \
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in_section = in_dtors; \
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} \
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}
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/* Switch into a generic section.
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This is currently only used to support section attributes. */
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#define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME, RELOC) \
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do { \
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static struct section_info \
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{ \
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struct section_info *next; \
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char *name; \
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enum sect_enum {SECT_RW, SECT_RO, SECT_EXEC} type; \
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} *sections; \
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struct section_info *s; \
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char *mode; \
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enum sect_enum type; \
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\
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for (s = sections; s; s = s->next) \
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if (!strcmp (NAME, s->name)) \
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break; \
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\
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if (DECL && TREE_CODE (DECL) == FUNCTION_DECL) \
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type = SECT_EXEC, mode = "ax"; \
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else if (DECL && DECL_READONLY_SECTION (DECL, RELOC)) \
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type = SECT_RO, mode = "a"; \
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else \
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type = SECT_RW, mode = "aw"; \
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\
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if (s == 0) \
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{ \
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s = (struct section_info *) xmalloc (sizeof (struct section_info)); \
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s->name = xmalloc ((strlen (NAME) + 1) * sizeof (*NAME)); \
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strcpy (s->name, NAME); \
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s->type = type; \
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s->next = sections; \
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sections = s; \
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fprintf (FILE, ".section\t%s,\"%s\",@progbits\n", NAME, mode); \
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} \
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else \
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{ \
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if (DECL && s->type != type) \
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error_with_decl (DECL, "%s causes a section type conflict"); \
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\
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fprintf (FILE, ".section\t%s\n", NAME); \
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} \
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} while (0)
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#define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
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#define UNIQUE_SECTION_P(DECL) (DECL_ONE_ONLY (DECL))
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#define UNIQUE_SECTION(DECL,RELOC) \
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do { \
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int len; \
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char *name, *string, *prefix; \
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\
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name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL)); \
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\
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if (! DECL_ONE_ONLY (DECL)) \
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{ \
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if (TREE_CODE (DECL) == FUNCTION_DECL) \
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prefix = ".text."; \
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else if (DECL_READONLY_SECTION (DECL, RELOC)) \
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prefix = ".rodata."; \
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else \
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prefix = ".data."; \
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} \
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else if (TREE_CODE (DECL) == FUNCTION_DECL) \
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prefix = ".gnu.linkonce.t."; \
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else if (DECL_READONLY_SECTION (DECL, RELOC)) \
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prefix = ".gnu.linkonce.r."; \
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else \
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prefix = ".gnu.linkonce.d."; \
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\
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len = strlen (name) + strlen (prefix); \
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string = alloca (len + 1); \
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sprintf (string, "%s%s", prefix, name); \
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\
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DECL_SECTION_NAME (DECL) = build_string (len, string); \
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} while (0)
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/* A C statement (sans semicolon) to output an element in the table of
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global constructors. */
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#define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \
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do { \
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ctors_section (); \
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fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
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assemble_name (FILE, NAME); \
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fprintf (FILE, "\n"); \
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} while (0)
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/* A C statement (sans semicolon) to output an element in the table of
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global destructors. */
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#define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
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do { \
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dtors_section (); \
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fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
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assemble_name (FILE, NAME); \
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fprintf (FILE, "\n"); \
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} while (0)
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/* A C statement or statements to switch to the appropriate
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section for output of DECL. DECL is either a `VAR_DECL' node
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or a constant of some sort. RELOC indicates whether forming
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the initial value of DECL requires link-time relocations. */
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#define SELECT_SECTION(DECL,RELOC) \
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{ \
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if (TREE_CODE (DECL) == STRING_CST) \
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{ \
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if (! flag_writable_strings) \
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const_section (); \
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else \
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data_section (); \
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} \
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else if (TREE_CODE (DECL) == VAR_DECL \
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|| TREE_CODE (DECL) == CONSTRUCTOR) \
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{ \
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if ((flag_pic && RELOC) \
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|| !TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL) \
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|| !DECL_INITIAL (DECL) \
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|| (DECL_INITIAL (DECL) != error_mark_node \
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&& !TREE_CONSTANT (DECL_INITIAL (DECL)))) \
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data_section (); \
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else \
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const_section (); \
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} \
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else \
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const_section (); \
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}
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/* A C statement or statements to switch to the appropriate
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section for output of RTX in mode MODE. RTX is some kind
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of constant in RTL. The argument MODE is redundant except
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in the case of a `const_int' rtx. Currently, these always
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go into the const section. */
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#undef SELECT_RTX_SECTION
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#define SELECT_RTX_SECTION(MODE,RTX) const_section()
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/* Define the strings used for the special svr4 .type and .size directives.
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These strings generally do not vary from one system running svr4 to
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another, but if a given system (e.g. m88k running svr) needs to use
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different pseudo-op names for these, they may be overridden in the
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file which includes this one. */
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#define TYPE_ASM_OP ".type"
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#define SIZE_ASM_OP ".size"
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/* This is how we tell the assembler that a symbol is weak. */
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#define ASM_WEAKEN_LABEL(FILE,NAME) \
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do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \
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fputc ('\n', FILE); } while (0)
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/* The following macro defines the format used to output the second
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operand of the .type assembler directive. Different svr4 assemblers
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expect various different forms for this operand. The one given here
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is just a default. You may need to override it in your machine-
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specific tm.h file (depending upon the particulars of your assembler). */
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#define TYPE_OPERAND_FMT "@%s"
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/* Write the extra assembler code needed to declare a function's result.
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Most svr4 assemblers don't require any special declaration of the
|
|
result value, but there are exceptions. */
|
|
|
|
#ifndef ASM_DECLARE_RESULT
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|
#define ASM_DECLARE_RESULT(FILE, RESULT)
|
|
#endif
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|
|
|
/* 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. */
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|
|
|
/* 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) \
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|
do { \
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|
fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
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|
assemble_name (FILE, NAME); \
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|
putc (',', FILE); \
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|
fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
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|
putc ('\n', FILE); \
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|
ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
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|
ASM_OUTPUT_LABEL(FILE, NAME); \
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|
} while (0)
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|
|
|
/* Write the extra assembler code needed to declare an object properly. */
|
|
|
|
#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
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|
do { \
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|
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); \
|
|
fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (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 { \
|
|
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); \
|
|
fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
|
|
} \
|
|
} while (0)
|
|
|
|
/* This is how to declare the size of a function. */
|
|
|
|
#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
|
|
do { \
|
|
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); \
|
|
} \
|
|
} while (0)
|
|
|
|
/* A table of bytes codes used by the ASM_OUTPUT_ASCII and
|
|
ASM_OUTPUT_LIMITED_STRING macros. Each byte in the table
|
|
corresponds to a particular byte value [0..255]. For any
|
|
given byte value, if the value in the corresponding table
|
|
position is zero, the given character can be output directly.
|
|
If the table value is 1, the byte must be output as a \ooo
|
|
octal escape. If the tables value is anything else, then the
|
|
byte value should be output as a \ followed by the value
|
|
in the table. Note that we can use standard UN*X escape
|
|
sequences for many control characters, but we don't use
|
|
\a to represent BEL because some svr4 assemblers (e.g. on
|
|
the i386) don't know about that. Also, we don't use \v
|
|
since some versions of gas, such as 2.2 did not accept it. */
|
|
|
|
#define ESCAPES \
|
|
"\1\1\1\1\1\1\1\1btn\1fr\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
|
|
\0\0\"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
|
|
\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\\\0\0\0\
|
|
\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\
|
|
\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
|
|
\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
|
|
\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
|
|
\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1"
|
|
|
|
/* Some svr4 assemblers have a limit on the number of characters which
|
|
can appear in the operand of a .string directive. If your assembler
|
|
has such a limitation, you should define STRING_LIMIT to reflect that
|
|
limit. Note that at least some svr4 assemblers have a limit on the
|
|
actual number of bytes in the double-quoted string, and that they
|
|
count each character in an escape sequence as one byte. Thus, an
|
|
escape sequence like \377 would count as four bytes.
|
|
|
|
If your target assembler doesn't support the .string directive, you
|
|
should define this to zero.
|
|
*/
|
|
|
|
#define STRING_LIMIT ((unsigned) 256)
|
|
|
|
#define STRING_ASM_OP ".string"
|
|
|
|
/* The routine used to output NUL terminated strings. We use a special
|
|
version of this for most svr4 targets because doing so makes the
|
|
generated assembly code more compact (and thus faster to assemble)
|
|
as well as more readable, especially for targets like the i386
|
|
(where the only alternative is to output character sequences as
|
|
comma separated lists of numbers). */
|
|
|
|
#define ASM_OUTPUT_LIMITED_STRING(FILE, STR) \
|
|
do \
|
|
{ \
|
|
register unsigned char *_limited_str = (unsigned char *) (STR); \
|
|
register unsigned ch; \
|
|
fprintf ((FILE), "\t%s\t\"", STRING_ASM_OP); \
|
|
for (; ch = *_limited_str; _limited_str++) \
|
|
{ \
|
|
register int escape; \
|
|
switch (escape = ESCAPES[ch]) \
|
|
{ \
|
|
case 0: \
|
|
putc (ch, (FILE)); \
|
|
break; \
|
|
case 1: \
|
|
fprintf ((FILE), "\\%03o", ch); \
|
|
break; \
|
|
default: \
|
|
putc ('\\', (FILE)); \
|
|
putc (escape, (FILE)); \
|
|
break; \
|
|
} \
|
|
} \
|
|
fprintf ((FILE), "\"\n"); \
|
|
} \
|
|
while (0)
|
|
|
|
/* The routine used to output sequences of byte values. We use a special
|
|
version of this for most svr4 targets because doing so makes the
|
|
generated assembly code more compact (and thus faster to assemble)
|
|
as well as more readable. Note that if we find subparts of the
|
|
character sequence which end with NUL (and which are shorter than
|
|
STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING. */
|
|
|
|
#undef ASM_OUTPUT_ASCII
|
|
#define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \
|
|
do \
|
|
{ \
|
|
register unsigned char *_ascii_bytes = (unsigned char *) (STR); \
|
|
register unsigned char *limit = _ascii_bytes + (LENGTH); \
|
|
register unsigned bytes_in_chunk = 0; \
|
|
for (; _ascii_bytes < limit; _ascii_bytes++) \
|
|
{ \
|
|
register unsigned char *p; \
|
|
if (bytes_in_chunk >= 60) \
|
|
{ \
|
|
fprintf ((FILE), "\"\n"); \
|
|
bytes_in_chunk = 0; \
|
|
} \
|
|
for (p = _ascii_bytes; p < limit && *p != '\0'; p++) \
|
|
continue; \
|
|
if (p < limit && (p - _ascii_bytes) <= STRING_LIMIT) \
|
|
{ \
|
|
if (bytes_in_chunk > 0) \
|
|
{ \
|
|
fprintf ((FILE), "\"\n"); \
|
|
bytes_in_chunk = 0; \
|
|
} \
|
|
ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes); \
|
|
_ascii_bytes = p; \
|
|
} \
|
|
else \
|
|
{ \
|
|
register int escape; \
|
|
register unsigned ch; \
|
|
if (bytes_in_chunk == 0) \
|
|
fprintf ((FILE), "\t%s\t\"", ASCII_DATA_ASM_OP); \
|
|
switch (escape = ESCAPES[ch = *_ascii_bytes]) \
|
|
{ \
|
|
case 0: \
|
|
putc (ch, (FILE)); \
|
|
bytes_in_chunk++; \
|
|
break; \
|
|
case 1: \
|
|
fprintf ((FILE), "\\%03o", ch); \
|
|
bytes_in_chunk += 4; \
|
|
break; \
|
|
default: \
|
|
putc ('\\', (FILE)); \
|
|
putc (escape, (FILE)); \
|
|
bytes_in_chunk += 2; \
|
|
break; \
|
|
} \
|
|
} \
|
|
} \
|
|
if (bytes_in_chunk > 0) \
|
|
fprintf ((FILE), "\"\n"); \
|
|
} \
|
|
while (0)
|
|
|
|
/* All SVR4 targets use the ELF object file format. */
|
|
#define OBJECT_FORMAT_ELF
|