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/* Target definitions for GNU compiler for PowerPC running System V.4
Copyright (C) 1995, Free Software Foundation, Inc.
Contributed by Cygnus Support.
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 GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* eABI local switches -- put here rather than eabi.h, so the switches
can be tested in macros. */
#define MASK_NO_BITFIELD_TYPE 0x40000000 /* Set PCC_BITFIELD_TYPE_MATTERS to 0 */
#define MASK_STRICT_ALIGN 0x20000000 /* Set STRICT_ALIGNMENT to 1. */
#define MASK_RELOCATABLE 0x10000000 /* GOT pointers are PC relative */
#define MASK_NO_TRACEBACK 0x08000000 /* eliminate traceback words */
#define MASK_LITTLE_ENDIAN 0x04000000 /* target is little endian */
#define MASK_AIX_CALLS 0x02000000 /* Use AIX calling sequence */
#define MASK_PROTOTYPE 0x01000000 /* Only prototyped fcns pass variable args */
#define TARGET_NO_BITFIELD_TYPE (target_flags & MASK_NO_BITFIELD_TYPE)
#define TARGET_STRICT_ALIGN (target_flags & MASK_STRICT_ALIGN)
#define TARGET_RELOCATABLE (target_flags & MASK_RELOCATABLE)
#define TARGET_NO_TRACEBACK (target_flags & MASK_NO_TRACEBACK)
#define TARGET_LITTLE_ENDIAN (target_flags & MASK_LITTLE_ENDIAN)
#define TARGET_AIX_CALLS (target_flags & MASK_AIX_CALLS)
#define TARGET_PROTOTYPE (target_flags & MASK_PROTOTYPE)
#define TARGET_TOC (target_flags & (MASK_64BIT \
| MASK_RELOCATABLE \
| MASK_MINIMAL_TOC))
#define TARGET_BITFIELD_TYPE (! TARGET_NO_BITFIELD_TYPE)
#define TARGET_TRACEBACK (! TARGET_NO_TRACEBACK)
#define TARGET_BIG_ENDIAN (! TARGET_LITTLE_ENDIAN)
#define TARGET_NO_AIX_CALLS (! TARGET_AIX_CALLS)
#define TARGET_NO_PROTOTYPE (! TARGET_PROTOTYPE)
#define TARGET_NO_TOC (! TARGET_TOC)
#define TARGET_V4_CALLS TARGET_NO_AIX_CALLS
/* Pseudo target to indicate whether the object format is ELF
(to get around not having conditional compilation in the md file) */
#define TARGET_ELF 1
/* Note, V.4 no longer uses a normal TOC, so make -mfull-toc, be just
the same as -mminimal-toc. */
#undef SUBTARGET_SWITCHES
#define SUBTARGET_SWITCHES \
{ "bit-align", -MASK_NO_BITFIELD_TYPE }, \
{ "no-bit-align", MASK_NO_BITFIELD_TYPE }, \
{ "strict-align", MASK_STRICT_ALIGN }, \
{ "no-strict-align", -MASK_STRICT_ALIGN }, \
{ "relocatable", MASK_RELOCATABLE | MASK_MINIMAL_TOC | MASK_NO_FP_IN_TOC }, \
{ "no-relocatable", -MASK_RELOCATABLE }, \
{ "traceback", -MASK_NO_TRACEBACK }, \
{ "no-traceback", MASK_NO_TRACEBACK }, \
{ "little-endian", MASK_LITTLE_ENDIAN }, \
{ "little", MASK_LITTLE_ENDIAN }, \
{ "big-endian", -MASK_LITTLE_ENDIAN }, \
{ "big", -MASK_LITTLE_ENDIAN }, \
{ "no-toc", 0 }, \
{ "toc", MASK_MINIMAL_TOC }, \
{ "full-toc", MASK_MINIMAL_TOC }, \
{ "call-aix", MASK_AIX_CALLS }, \
{ "call-sysv", -MASK_AIX_CALLS }, \
{ "prototype", MASK_PROTOTYPE }, \
{ "no-prototype", -MASK_PROTOTYPE },
/* Sometimes certain combinations of command options do not make sense
on a particular target machine. You can define a macro
`OVERRIDE_OPTIONS' to take account of this. This macro, if
defined, is executed once just after all the command options have
been parsed.
The macro SUBTARGET_OVERRIDE_OPTIONS is provided for subtargets, to
get control. */
#define SUBTARGET_OVERRIDE_OPTIONS \
do { \
if (TARGET_RELOCATABLE && !TARGET_MINIMAL_TOC) \
{ \
target_flags |= MASK_MINIMAL_TOC; \
error ("-mrelocatable and -mno-minimal-toc are incompatible."); \
} \
} while (0)
#include "rs6000/powerpc.h"
/* System V.4 uses register 13 as a pointer to the small data area,
so it is not available to the normal user. */
#undef FIXED_R13
#define FIXED_R13 1
/* System V.4 passes the first 8 floating arguments in registers,
instead of the first 13 like AIX does. */
#undef FP_ARG_MAX_REG
#define FP_ARG_AIX_MAX_REG 45
#define FP_ARG_V4_MAX_REG 40
#define FP_ARG_MAX_REG ((TARGET_AIX_CALLS) ? FP_ARG_AIX_MAX_REG : FP_ARG_V4_MAX_REG)
/* Size of the V.4 varargs area if needed */
#undef RS6000_VARARGS_AREA
#define RS6000_VARARGS_AREA ((rs6000_sysv_varargs_p) ? RS6000_VARARGS_SIZE : 0)
/* Override default big endianism */
#undef BYTES_BIG_ENDIAN
#undef WORDS_BIG_ENDIAN
#define BYTES_BIG_ENDIAN (TARGET_BIG_ENDIAN)
#define WORDS_BIG_ENDIAN (TARGET_BIG_ENDIAN)
/* Define this to set the endianness to use in libgcc2.c, which can
not depend on target_flags. */
#ifndef _LITTLE_ENDIAN
#define LIBGCC2_WORDS_BIG_ENDIAN 1
#else
#define LIBGCC2_WORDS_BIG_ENDIAN 0
#endif
/* Size of the outgoing register save area */
#undef RS6000_REG_SAVE
#define RS6000_REG_SAVE (TARGET_AIX_CALLS ? (TARGET_64BIT ? 64 : 32) : 0)
/* Size of the fixed area on the stack. For AIX, use the standard 6 word
area, otherwise use 2 words to store back chain & LR. */
#undef RS6000_SAVE_AREA
#define RS6000_SAVE_AREA \
((TARGET_AIX_CALLS ? 24 : 8) << (TARGET_64BIT ? 1 : 0))
/* Define cutoff for using external functions to save floating point.
Currently on V.4, always use inline stores */
#undef FP_SAVE_INLINE
#define FP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) < 64)
/* Don't generate XCOFF debugging information. */
#undef XCOFF_DEBUGGING_INFO
/* Don't use the COFF object file format. */
#undef OBJECT_FORMAT_COFF
/* The XCOFF support uses weird symbol suffixes, which we don't want
for ELF. */
#undef RS6000_OUTPUT_BASENAME
#define RS6000_OUTPUT_BASENAME(FILE, NAME) assemble_name (FILE, NAME)
/* Don't bother to output .extern pseudo-ops. They are not needed by
ELF assemblers. */
#undef ASM_OUTPUT_EXTERNAL
/* Undefine some things which are defined by the generic svr4.h. */
#undef ASM_FILE_END
#undef ASM_OUTPUT_EXTERNAL_LIBCALL
#undef READONLY_DATA_SECTION
#undef SELECT_SECTION
#undef ASM_DECLARE_FUNCTION_NAME
#undef ASM_OUTPUT_CONSTRUCTOR
#undef ASM_OUTPUT_DESTRUCTOR
/* Use the regular svr4 definitions. */
#include "svr4.h"
/* Prefix and suffix to use to saving floating point */
#undef SAVE_FP_PREFIX
#undef SAVE_FP_SUFFIX
#define SAVE_FP_PREFIX "_savefpr_"
#define SAVE_FP_SUFFIX "_l"
/* Prefix and suffix to use to restoring floating point */
#undef RESTORE_FP_PREFIX
#undef RESTORE_FP_SUFFIX
#define RESTORE_FP_PREFIX "_restfpr_"
#define RESTORE_FP_SUFFIX "_l"
/* Type used for ptrdiff_t, as a string used in a declaration. */
#undef PTRDIFF_TYPE
#define PTRDIFF_TYPE "int"
/* Type used for wchar_t, as a string used in a declaration. */
#undef WCHAR_TYPE
#define WCHAR_TYPE "short unsigned int"
/* Width of wchar_t in bits. */
#undef WCHAR_TYPE_SIZE
#define WCHAR_TYPE_SIZE 16
/* Align stack to 16 byte boundaries */
#undef STACK_BOUNDARY
#define STACK_BOUNDARY 128
/* No data type wants to be aligned rounder than this. */
#undef BIGGEST_ALIGNMENT
#define BIGGEST_ALIGNMENT 128
/* Use ELF style section commands. */
#undef TEXT_SECTION_ASM_OP
#define TEXT_SECTION_ASM_OP "\t.section\t\".text\""
#undef DATA_SECTION_ASM_OP
#define DATA_SECTION_ASM_OP "\t.section\t\".data\""
/* Besides the usual ELF sections, we need a toc section. */
#undef EXTRA_SECTIONS
#define EXTRA_SECTIONS in_const, in_ctors, in_dtors, in_toc
#undef EXTRA_SECTION_FUNCTIONS
#define EXTRA_SECTION_FUNCTIONS \
CONST_SECTION_FUNCTION \
CTORS_SECTION_FUNCTION \
DTORS_SECTION_FUNCTION \
TOC_SECTION_FUNCTION
#define TOC_SECTION_FUNCTION \
void \
toc_section () \
{ \
static int toc_initialized = 0; \
\
if (in_section != in_toc) \
{ \
in_section = in_toc; \
fprintf (asm_out_file, "%s\n", MINIMAL_TOC_SECTION_ASM_OP); \
if (! toc_initialized) \
{ \
ASM_OUTPUT_INTERNAL_LABEL_PREFIX (asm_out_file, "LCTOC1"); \
fprintf (asm_out_file, " = .+32768\n"); \
toc_initialized = 1; \
} \
} \
}
#define TOC_SECTION_ASM_OP "\t.section\t\".got\",\"aw\""
#define MINIMAL_TOC_SECTION_ASM_OP "\t.section\t\".got1\",\"aw\""
/* Use the TOC section for TOC entries. */
#undef SELECT_RTX_SECTION
#define SELECT_RTX_SECTION(MODE, X) \
{ if (ASM_OUTPUT_SPECIAL_POOL_ENTRY_P (X)) \
toc_section (); \
else \
const_section (); \
}
/* 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. */
/* 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. */
extern void svr4_traceback ();
extern int rs6000_pic_labelno;
#undef ASM_DECLARE_FUNCTION_NAME
#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
do { \
if (TARGET_RELOCATABLE && get_pool_size () != 0) \
{ \
char buf[256]; \
\
ASM_OUTPUT_INTERNAL_LABEL (FILE, "LCL", rs6000_pic_labelno); \
\
ASM_GENERATE_INTERNAL_LABEL (buf, "LCTOC", 1); \
fprintf (FILE, (TARGET_POWERPC64) ? "\t.quad " : "\t.long "); \
assemble_name (FILE, buf); \
putc ('-', FILE); \
\
ASM_GENERATE_INTERNAL_LABEL (buf, "LCF", rs6000_pic_labelno); \
assemble_name (FILE, buf); \
putc ('\n', FILE); \
} \
\
fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
assemble_name (FILE, NAME); \
putc (',', FILE); \
fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
putc ('\n', FILE); \
if (TARGET_TRACEBACK) \
svr4_traceback (FILE, NAME, DECL); \
ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
ASM_OUTPUT_LABEL(FILE, NAME); \
} while (0)
/* How to renumber registers for dbx and gdb. */
#define DBX_REGISTER_NUMBER(REGNO) (REGNO)
/* svr4.h overrides ASM_OUTPUT_INTERNAL_LABEL. */
#undef ASM_OUTPUT_INTERNAL_LABEL_PREFIX
#define ASM_OUTPUT_INTERNAL_LABEL_PREFIX(FILE,PREFIX) \
fprintf (FILE, ".%s", PREFIX)
/* Pass -mppc to the assembler, since that is what powerpc.h currently
implies. */
#undef ASM_SPEC
#define ASM_SPEC \
"-u \
%{mcpu=601: -m601} %{!mcpu=601: -mppc} \
%{V} %{v:%{!V:-V}} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*} \
%{mrelocatable} \
%{mlittle} %{mlittle-endian} %{mbig} %{mbig-endian}"
/* Output .file and comments listing what options there are */
#undef ASM_FILE_START
#define ASM_FILE_START(FILE) \
do { \
ASM_OUTPUT_OPTIONS (FILE); \
output_file_directive ((FILE), main_input_filename); \
} while (0)
/* This is the end of what might become sysv4.h. */
/* Allow stabs and dwarf, prefer dwarf. */
#define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
#define DBX_DEBUGGING_INFO
#define DWARF_DEBUGGING_INFO
/* This macro gets just the user-specified name
out of the string in a SYMBOL_REF. Discard
a leading * */
#undef STRIP_NAME_ENCODING
#define STRIP_NAME_ENCODING(VAR,SYMBOL_NAME) \
(VAR) = ((SYMBOL_NAME) + ((SYMBOL_NAME)[0] == '*'))
/* Like block addresses, stabs line numbers are relative to the
current function. */
#undef ASM_OUTPUT_SOURCE_LINE
#define ASM_OUTPUT_SOURCE_LINE(file, line) \
do \
{ \
static int sym_lineno = 1; \
char *_p; \
fprintf (file, "\t.stabn 68,0,%d,.LM%d-", \
line, sym_lineno); \
STRIP_NAME_ENCODING (_p, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \
assemble_name (file, _p); \
fprintf (file, "\n.LM%d:\n", sym_lineno); \
sym_lineno += 1; \
} \
while (0)
/* But, to make this work, we have to output the stabs for the function
name *first*... */
#define DBX_FUNCTION_FIRST
/* This is the end of what might become sysv4dbx.h. */
#undef TARGET_VERSION
#define TARGET_VERSION fprintf (stderr, " (PowerPC System V.4)");
/* Output assembler code for a block containing the constant parts
of a trampoline, leaving space for the variable parts.
The trampoline should set the static chain pointer to value placed
into the trampoline and should branch to the specified routine.
Unlike AIX, this needs real code. */
#undef TRAMPOLINE_TEMPLATE
#define TRAMPOLINE_TEMPLATE(FILE) \
do { \
char *sc = reg_names[STATIC_CHAIN_REGNUM]; \
char *r0 = reg_names[0]; \
\
if (STATIC_CHAIN_REGNUM == 0 || !TARGET_NEW_MNEMONICS) \
abort (); \
\
if (TARGET_64BIT) \
{ \
fprintf (FILE, "\tmflr %s\n", r0); /* offset 0 */ \
fprintf (FILE, "\tbl .LTRAMP1\n"); /* offset 4 */ \
fprintf (FILE, "\t.long 0,0,0,0\n"); /* offset 8 */ \
fprintf (FILE, ".LTRAMP1:\n"); \
fprintf (FILE, "\tmflr %s\n", sc); /* offset 28 */ \
fprintf (FILE, "\tmtlr %s\n", r0); /* offset 32 */ \
fprintf (FILE, "\tld %s,0(%s)\n", r0, sc); /* offset 36 */ \
fprintf (FILE, "\tld %s,8(%s)\n", sc, sc); /* offset 40 */ \
fprintf (FILE, "\tmtctr %s\n", r0); /* offset 44 */ \
fprintf (FILE, "\tbctr\n"); /* offset 48 */ \
} \
else \
{ \
fprintf (FILE, "\tmflr %s\n", r0); /* offset 0 */ \
fprintf (FILE, "\tbl .LTRAMP1\n"); /* offset 4 */ \
fprintf (FILE, "\t.long 0,0\n"); /* offset 8 */ \
fprintf (FILE, ".LTRAMP1:\n"); \
fprintf (FILE, "\tmflr %s\n", sc); /* offset 20 */ \
fprintf (FILE, "\tmtlr %s\n", r0); /* offset 24 */ \
fprintf (FILE, "\tlwz %s,0(%s)\n", r0, sc); /* offset 28 */ \
fprintf (FILE, "\tlwz %s,4(%s)\n", sc, sc); /* offset 32 */ \
fprintf (FILE, "\tmtctr %s\n", r0); /* offset 36 */ \
fprintf (FILE, "\tbctr\n"); /* offset 40 */ \
} \
} while (0)
/* Length in units of the trampoline for entering a nested function. */
#undef TRAMPOLINE_SIZE
#define TRAMPOLINE_SIZE (TARGET_64BIT ? 48 : 40)
/* Emit RTL insns to initialize the variable parts of a trampoline.
FNADDR is an RTX for the address of the function's pure code.
CXT is an RTX for the static chain value for the function. */
#undef INITIALIZE_TRAMPOLINE
#define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, CXT) \
{ \
rtx reg = gen_reg_rtx (Pmode); \
\
emit_move_insn (reg, FNADDR); \
emit_move_insn (gen_rtx (MEM, Pmode, \
plus_constant (ADDR, 8)), \
reg); \
emit_move_insn (gen_rtx (MEM, Pmode, \
plus_constant (ADDR, (TARGET_64BIT ? 16 : 12))), \
CXT); \
emit_insn (gen_sync_isync (gen_rtx (MEM, BLKmode, ADDR))); \
}
#undef CPP_PREDEFINES
#define CPP_PREDEFINES \
"-DPPC -Dunix -D__svr4__ -Asystem(unix) -Asystem(svr4) -Acpu(powerpc) -Amachine(powerpc)"
/* Don't put -Y P,<path> for cross compilers */
#undef LINK_SPEC
#ifdef CROSS_COMPILE
#define LINK_SPEC "\
%{h*} %{V} %{v:%{!V:-V}} \
%{b} %{Wl,*:%*} \
%{static:-dn -Bstatic} \
%{shared:-G -dy -z text %{!h*:%{o*:-h %*}}} \
%{symbolic:-Bsymbolic -G -dy -z text %{!h*:%{o*:-h %*}}} \
%{G:-G} \
%{YP,*} \
%{Qy:} %{!Qn:-Qy} \
%{mlittle: -oformat elf32-powerpcle } %{mlittle-endian: -oformat elf32-powerpcle } \
%{mbig: -oformat elf32-powerpc } %{mbig-endian: -oformat elf32-powerpc }"
#else
#define LINK_SPEC "\
%{h*} %{V} %{v:%{!V:-V}} \
%{b} %{Wl,*:%*} \
%{static:-dn -Bstatic} \
%{shared:-G -dy -z text %{!h*:%{o*:-h %*}}} \
%{symbolic:-Bsymbolic -G -dy -z text %{!h*:%{o*:-h %*}}} \
%{G:-G} \
%{YP,*} \
%{!nostdlib: %{!YP,*:%{p:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
%{!p:-Y P,/usr/ccs/lib:/usr/lib}}} \
%{Qy:} %{!Qn:-Qy} \
%{mlittle: -oformat elf32-powerpcle } %{mlittle-endian: -oformat elf32-powerpcle } \
%{mbig: -oformat elf32-powerpc } %{mbig-endian: -oformat elf32-powerpc }"
#endif /* CROSS_COMPILE */
#undef CPP_SPEC
#define CPP_SPEC "\
%{posix: -D_POSIX_SOURCE} \
%{mrelocatable: -D_RELOCATABLE} \
%{mcall-sysv: -D_CALL_SYSV} %{mcall-aix: -D_CALL_AIX} %{!mcall-sysv: %{!mcall-aix: -D_CALL_SYSV}} \
%{msoft-float: -D_SOFT_FLOAT} %{mcpu=403: -D_SOFT_FLOAT} \
%{mlittle: -D_LITTLE_ENDIAN -Amachine(littleendian)} \
%{mlittle-endian: -D_LITTLE_ENDIAN -Amachine(littleendian)} \
%{!mlittle: %{!mlittle-endian: -D_BIG_ENDIAN -Amachine(bigendian)}} \
%{!mcpu*: \
%{mpower: %{!mpower2: -D_ARCH_PWR}} \
%{mpower2: -D_ARCH_PWR2} \
%{mpowerpc*: -D_ARCH_PPC} \
%{mno-powerpc: %{!mpower: %{!mpower2: -D_ARCH_COM}}} \
%{!mno-powerpc: -D_ARCH_PPC}} \
%{mcpu=common: -D_ARCH_COM} \
%{mcpu=power: -D_ARCH_PWR} \
%{mcpu=powerpc: -D_ARCH_PPC} \
%{mcpu=rios: -D_ARCH_PWR} \
%{mcpu=rios1: -D_ARCH_PWR} \
%{mcpu=rios2: -D_ARCH_PWR2} \
%{mcpu=rsc: -D_ARCH_PWR} \
%{mcpu=rsc1: -D_ARCH_PWR} \
%{mcpu=403: -D_ARCH_PPC} \
%{mcpu=601: -D_ARCH_PPC -D_ARCH_PWR} \
%{mcpu=603: -D_ARCH_PPC} \
%{mcpu=604: -D_ARCH_PPC}"
|
