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This should get us the same functionality we had with GCC 2.7.2.1.

Browse source 
*  Support for our dual ELF/a.out building ability
*  Our custom ASM_* definitions
*  Our custom debugger and profiling related definitions
*  Our custom STARTFILE/ENDFILE specs

*  The stock EGCS 1.1.2 freebsd-elf.h file depended on
   egcs-1.1.2/gcc/config/linux.h, which included "svr4.h".  We will
   include "svr4.h" via our "tm.h" definition.  So add the few bits
   from "linux.h" we actually needed.

*  Using our current crtbegin.o/crtend.o we cannot support the DWARF2
   unwinding mechanisms.  In the future we will switch to the
   non-sjlj-exceptions type exception machanism.  However the `make world'
   bootstrap problems with the EGCS crtstuff.c must be overcome first.

*  Our a.out gas doesn't "know" to use NOP's for aligns while in the text
   section.  Thus the a.out alignment generation needed tweaking from
   what we did with GCC 2.7.2.  [from BDE]

*  The definition of SUPPORTS_ONE_ONLY prevents the compiler from trying
   to use "linkonce" sections for a.out.  The definition of
   NO_DBX_FUNCTION_END we had causes it to avoid .stabs symbols that the
   assembler cannot handle for a.out.  [from JDP]

*  The previous "EXCEPTION_SECTION_FUNCTION" is the wrong name for EGCS.
   It also needed tweaking for EGCS.  [from JDP]

Also bump __FreeBSD_cc_version to 400002 in case we need to know we are
using EGCS at some point.
This commit is contained in:
David E. O'Brien 1999-09-19 10:28:57 +00:00
parent fc80907389
commit 844dfb548c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=51408
2 changed files with 278 additions and 214 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

246
contrib/gcc/config/i386/freebsd.h
View file

@ -1,8 +1,8 @@
/* Definitions for Intel 386 running FreeBSD with either a.out or ELF format
Copyright (C) 1994, 1995 Free Software Foundation, Inc.
Copyright (C) 1996 Free Software Foundation, Inc.
Contributed by Eric Youngdale.
Modified for stabs-in-ELF by H.J. Lu.
Adapted from Linux version by John Polstra.
Adapted from GNU/Linux version by John Polstra.
Added support for generating "old a.out gas" on the fly by Peter Wemm.
This file is part of GNU CC.
@ -22,35 +22,36 @@ 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. */
/* A lie, I guess, but the general idea behind FreeBSD/ELF is that we are
supposed to be outputting something that will assemble under SVr4.
This gets us pretty close. */
#include <i386/i386.h> /* Base i386 target machine definitions */
#include <i386/att.h> /* Use the i386 AT&T assembler syntax */
#include <linux.h> /* some common stuff */
/* $FreeBSD$ */
/* Don't assume anything about the header files. */
#undef TARGET_VERSION
#define TARGET_VERSION fprintf (stderr, " (i386 FreeBSD/ELF)");
/* The svr4 ABI for the i386 says that records and unions are returned
in memory. */
/* On FreeBSD, we do not. */
#undef DEFAULT_PCC_STRUCT_RETURN
#define DEFAULT_PCC_STRUCT_RETURN 0
/* This gets defined in tm.h->linux.h->svr4.h, and keeps us from using
libraries compiled with the native cc, so undef it. */
#undef NO_DOLLAR_IN_LABEL
/* Don't assume anything about the header files. */
#undef NO_IMPLICIT_EXTERN_C
#define NO_IMPLICIT_EXTERN_C
/* This defines which switch letters take arguments. On svr4, most of
/* This defines which switch letters take arguments. On FreeBSD, most of
the normal cases (defined in gcc.c) apply, and we also have -h* and
-z* options (for the linker). We have a slightly different mix. We
have -R (alias --rpath), no -z, --soname (-h), --assert etc. */
-z* options (for the linker) (comming from svr4).
We also have -R (alias --rpath), no -z, --soname (-h), --assert etc. */
#undef SWITCH_TAKES_ARG
#define SWITCH_TAKES_ARG(CHAR) \
( (CHAR) == 'D' \
|| (CHAR) == 'U' \
|| (CHAR) == 'o' \
|| (CHAR) == 'e' \
|| (CHAR) == 'T' \
|| (CHAR) == 'u' \
|| (CHAR) == 'I' \
|| (CHAR) == 'm' \
|| (CHAR) == 'L' \
|| (CHAR) == 'A' \
|| (CHAR) == 'h' \
|| (CHAR) == 'z' /* ignored by ld */ \
#define SWITCH_TAKES_ARG(CHAR) \
(DEFAULT_SWITCH_TAKES_ARG (CHAR) \
|| (CHAR) == 'h' \
|| (CHAR) == 'z' /* ignored by ld */ \
|| (CHAR) == 'R')
#undef WORD_SWITCH_TAKES_ARG
@ -60,9 +61,6 @@ Boston, MA 02111-1307, USA. */
|| !strcmp (STR, "soname") || !strcmp (STR, "defsym") \
|| !strcmp (STR, "assert") || !strcmp (STR, "dynamic-linker"))
#undef TARGET_VERSION
#define TARGET_VERSION fprintf (stderr, " (i386 FreeBSD)");
#define MASK_PROFILER_EPILOGUE 010000000000
#define MASK_AOUT 004000000000 /* a.out not elf */
#define MASK_UNDERSCORES 002000000000 /* use leading _ */
@ -81,12 +79,6 @@ Boston, MA 02111-1307, USA. */
{ "underscores", MASK_UNDERSCORES}, \
{ "no-underscores", -MASK_UNDERSCORES},
/* The svr4 ABI for the i386 says that records and unions are returned
in memory. */
/* On FreeBSD, we do not. */
#undef DEFAULT_PCC_STRUCT_RETURN
#define DEFAULT_PCC_STRUCT_RETURN 0
/* Prefix for internally generated assembler labels. If we aren't using
underscores, we are using prefix `.'s to identify labels that should
be ignored, as in `i386/gas.h' --karl@cs.umb.edu */
@ -106,6 +98,8 @@ Boston, MA 02111-1307, USA. */
#undef ASM_APP_OFF
#define ASM_APP_OFF "#NO_APP\n"
#define SET_ASM_OP ".set"
/* Output at beginning of assembler file. */
/* The .file command should always begin the output. */
@ -153,29 +147,28 @@ Boston, MA 02111-1307, USA. */
This is only used for PIC code. See comments by the `casesi' insn in
i386.md for an explanation of the expression this outputs. */
#undef ASM_OUTPUT_ADDR_DIFF_ELT
#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL) \
#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
fprintf (FILE, "\t.long _GLOBAL_OFFSET_TABLE_+[.-%s%d]\n", LPREFIX, VALUE)
#undef ASM_OUTPUT_ALIGN
#define ASM_OUTPUT_ALIGN(FILE,LOG) \
if ((LOG)!=0) fprintf ((FILE), "\t.p2align %d\n", (LOG))
/* Align labels, etc. at 4-byte boundaries.
For the 486, align to 16-byte boundary for sake of cache. */
#undef ASM_OUTPUT_ALIGN_CODE
#define ASM_OUTPUT_ALIGN_CODE(FILE) \
fprintf ((FILE), "\t.p2align %d,0x90\n", i386_align_jumps)
/* Align start of loop at 4-byte boundary. */
#undef ASM_OUTPUT_LOOP_ALIGN
#define ASM_OUTPUT_LOOP_ALIGN(FILE) \
fprintf ((FILE), "\t.p2align %d,0x90\n", i386_align_loops)
#define ASM_OUTPUT_ALIGN(FILE,LOG) \
if ((LOG)!=0) { \
if (in_text_section()) \
fprintf ((FILE), "\t.p2align %d,0x90\n", (LOG)); \
else \
fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
}
/* conditionalize the use of ".section rodata" on elf mode - otherwise .text */
#undef USE_CONST_SECTION
#define USE_CONST_SECTION TARGET_ELF
/* The a.out tools do not support "linkonce" sections. */
#define SUPPORTS_ONE_ONLY TARGET_ELF
/* The a.out tools do not support "Lscope" .stabs symbols. */
#define NO_DBX_FUNCTION_END TARGET_AOUT
/* A C statement (sans semicolon) to output an element in the table of
global constructors. */
#undef ASM_OUTPUT_CONSTRUCTOR
@ -285,6 +278,16 @@ do { \
} \
} while (0)
#undef DEFAULT_VTABLE_THUNKS
#define DEFAULT_VTABLE_THUNKS 1
/* This is BSD, so we want the DBX format. */
#define DBX_DEBUGGING_INFO
/* Use stabs instead of DWARF debug format. */
#undef PREFERRED_DEBUGGING_TYPE
#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
/* in elf, the function stabs come first, before the relative offsets */
#undef DBX_FUNCTION_FIRST
#define DBX_CHECK_FUNCTION_FIRST TARGET_ELF
@ -335,13 +338,13 @@ do { \
/* Indicate that jump tables go in the text section. This is
necessary when compiling PIC code. */
#define JUMP_TABLES_IN_TEXT_SECTION
#define JUMP_TABLES_IN_TEXT_SECTION (flag_pic)
/* override the exception table positioning */
#define EXCEPTION_SECTION_FUNCTION \
#define EXCEPTION_SECTION() \
do { \
if (TARGET_ELF) { \
named_section (NULL_TREE, ".gcc_except_table"); \
named_section (NULL_TREE, ".gcc_except_table", 0); \
} else { \
if (flag_pic) \
data_section (); \
@ -358,12 +361,61 @@ do { \
VOIDmode, 0); \
} while (0)
/* Use dollar signs in special g++ assembler names. */
#undef NO_DOLLAR_IN_LABEL
/* Map i386 registers to the numbers dwarf expects. Of course this is different
from what stabs expects. */
/* Copy this from the svr4 specifications... */
/* Define the register numbers to be used in Dwarf debugging information.
The SVR4 reference port C compiler uses the following register numbers
in its Dwarf output code:
0 for %eax (gnu regno = 0)
1 for %ecx (gnu regno = 2)
2 for %edx (gnu regno = 1)
3 for %ebx (gnu regno = 3)
4 for %esp (gnu regno = 7)
5 for %ebp (gnu regno = 6)
6 for %esi (gnu regno = 4)
7 for %edi (gnu regno = 5)
The following three DWARF register numbers are never generated by
the SVR4 C compiler or by the GNU compilers, but SDB on x86/svr4
believes these numbers have these meanings.
8 for %eip (no gnu equivalent)
9 for %eflags (no gnu equivalent)
10 for %trapno (no gnu equivalent)
It is not at all clear how we should number the FP stack registers
for the x86 architecture. If the version of SDB on x86/svr4 were
a bit less brain dead with respect to floating-point then we would
have a precedent to follow with respect to DWARF register numbers
for x86 FP registers, but the SDB on x86/svr4 is so completely
broken with respect to FP registers that it is hardly worth thinking
of it as something to strive for compatibility with.
The version of x86/svr4 SDB I have at the moment does (partially)
seem to believe that DWARF register number 11 is associated with
the x86 register %st(0), but that's about all. Higher DWARF
register numbers don't seem to be associated with anything in
particular, and even for DWARF regno 11, SDB only seems to under-
stand that it should say that a variable lives in %st(0) (when
asked via an `=' command) if we said it was in DWARF regno 11,
but SDB still prints garbage when asked for the value of the
variable in question (via a `/' command).
(Also note that the labels SDB prints for various FP stack regs
when doing an `x' command are all wrong.)
Note that these problems generally don't affect the native SVR4
C compiler because it doesn't allow the use of -O with -g and
because when it is *not* optimizing, it allocates a memory
location for each floating-point variable, and the memory
location is what gets described in the DWARF AT_location
attribute for the variable in question.
Regardless of the severe mental illness of the x86/svr4 SDB, we
do something sensible here and we use the following DWARF
register numbers. Note that these are all stack-top-relative
numbers.
11 for %st(0) (gnu regno = 8)
12 for %st(1) (gnu regno = 9)
13 for %st(2) (gnu regno = 10)
14 for %st(3) (gnu regno = 11)
15 for %st(4) (gnu regno = 12)
16 for %st(5) (gnu regno = 13)
17 for %st(6) (gnu regno = 14)
18 for %st(7) (gnu regno = 15)
*/
#undef DWARF_DBX_REGISTER_NUMBER
#define DWARF_DBX_REGISTER_NUMBER(n) \
((n) == 0 ? 0 \
@ -405,10 +457,14 @@ do { \
#define FUNCTION_PROFILER(FILE, LABELNO) \
{ \
if (flag_pic) \
fprintf (FILE, "\tcall *%s@GOT(%%ebx)\n", \
{ \
fprintf (FILE, "\tcall *%s@GOT(%%ebx)\n", \
TARGET_AOUT ? "mcount" : ".mcount"); \
} \
else \
fprintf (FILE, "\tcall %s\n", TARGET_AOUT ? "mcount" : ".mcount"); \
{ \
fprintf (FILE, "\tcall %s\n", TARGET_AOUT ? "mcount" : ".mcount"); \
} \
}
#define FUNCTION_PROFILER_EPILOGUE(FILE) \
@ -437,47 +493,9 @@ do { \
#undef WCHAR_TYPE_SIZE
#define WCHAR_TYPE_SIZE BITS_PER_WORD
/* FREEBSD_NATIVE is defined when gcc is integrated into the FreeBSD
source tree so it can be configured appropriately without using
the GNU configure/build mechanism. */
#ifdef FREEBSD_NATIVE
/* Look for the include files in the system-defined places. */
#define GPLUSPLUS_INCLUDE_DIR "/usr/include/g++"
#define GCC_INCLUDE_DIR "/usr/include"
/* FreeBSD has GCC_INCLUDE_DIR first. */
#define INCLUDE_DEFAULTS \
{ \
{ GCC_INCLUDE_DIR, 0, 0 }, \
{ GPLUSPLUS_INCLUDE_DIR, 1, 1 }, \
{ 0, 0, 0 } \
}
/* Under FreeBSD, the normal location of the compiler back ends is the
/usr/libexec directory. */
#define STANDARD_EXEC_PREFIX "/usr/libexec/"
/* Under FreeBSD, the normal location of the various *crt*.o files is the
/usr/lib directory. */
#define STANDARD_STARTFILE_PREFIX "/usr/lib/"
/* On FreeBSD, gcc is called 'cc' */
#define GCC_NAME "cc"
/* FreeBSD is 4.4BSD derived */
#define bsd4_4
#endif /* FREEBSD_NATIVE */
#undef CPP_PREDEFINES
#define CPP_PREDEFINES "-Dunix -Di386 -D__FreeBSD__=4 -D__FreeBSD_cc_version=400001 -Asystem(unix) -Asystem(FreeBSD) -Acpu(i386) -Amachine(i386)"
#define CPP_PREDEFINES "-Di386 -Dunix -D__FreeBSD__=4 -D__FreeBSD_cc_version=400002 -Asystem(unix) -Asystem(FreeBSD) -Acpu(i386) -Amachine(i386)"
#undef CPP_SPEC
#if TARGET_CPU_DEFAULT == 2
@ -518,6 +536,9 @@ do { \
have the time to search for those flags. I am sure how to add
support for -soname shared_object_name. H.J.
I took out %{v:%{!V:-V}}. It is too much :-(. They can use
-Wl,-V.
When the -shared link option is used a final link is not being
done. */
@ -540,8 +561,19 @@ do { \
%{!dynamic-linker: -dynamic-linker /usr/libexec/ld-elf.so.1}} \
%{static:-Bstatic}}}"
/* Get perform_* macros to build libgcc.a. */
#include "i386/perform.h"
/* A C statement to output to the stdio stream FILE an assembler
command to advance the location counter to a multiple of 1<<LOG
bytes if it is within MAX_SKIP bytes.
This is used to align code labels according to Intel recommendations. */
#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
#error "we don't have this for the aout gas"
#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
if ((LOG)!=0) \
if ((MAX_SKIP)==0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP))
#endif
#undef STARTFILE_SPEC
#define STARTFILE_SPEC "\
@ -560,9 +592,9 @@ do { \
#define TARGET_DEFAULT (MASK_NO_FANCY_MATH_387 | 0301)
#define HAVE_ATEXIT
#define HAVE_PUTENV
/* to assist building libgcc2.c */
#ifndef __ELF__
#undef OBJECT_FORMAT_ELF
#endif
/* FreeBSD ELF using our home-grown crtbegin.o/crtend.o does not support the
DWARF2 unwinding mechanisms. Once `make world' bootstraping problems with
the EGCS crtstuff.c is overcome, we will switch to the non-sjlj-exceptions
type exception machanism. */
#define DWARF2_UNWIND_INFO 0

246
contrib/gcc/config/i386/freebsd.h.fixed
View file

@ -1,8 +1,8 @@
/* Definitions for Intel 386 running FreeBSD with either a.out or ELF format
Copyright (C) 1994, 1995 Free Software Foundation, Inc.
Copyright (C) 1996 Free Software Foundation, Inc.
Contributed by Eric Youngdale.
Modified for stabs-in-ELF by H.J. Lu.
Adapted from Linux version by John Polstra.
Adapted from GNU/Linux version by John Polstra.
Added support for generating "old a.out gas" on the fly by Peter Wemm.
This file is part of GNU CC.
@ -22,35 +22,36 @@ 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. */
/* A lie, I guess, but the general idea behind FreeBSD/ELF is that we are
supposed to be outputting something that will assemble under SVr4.
This gets us pretty close. */
#include <i386/i386.h> /* Base i386 target machine definitions */
#include <i386/att.h> /* Use the i386 AT&T assembler syntax */
#include <linux.h> /* some common stuff */
/* $FreeBSD$ */
/* Don't assume anything about the header files. */
#undef TARGET_VERSION
#define TARGET_VERSION fprintf (stderr, " (i386 FreeBSD/ELF)");
/* The svr4 ABI for the i386 says that records and unions are returned
in memory. */
/* On FreeBSD, we do not. */
#undef DEFAULT_PCC_STRUCT_RETURN
#define DEFAULT_PCC_STRUCT_RETURN 0
/* This gets defined in tm.h->linux.h->svr4.h, and keeps us from using
libraries compiled with the native cc, so undef it. */
#undef NO_DOLLAR_IN_LABEL
/* Don't assume anything about the header files. */
#undef NO_IMPLICIT_EXTERN_C
#define NO_IMPLICIT_EXTERN_C
/* This defines which switch letters take arguments. On svr4, most of
/* This defines which switch letters take arguments. On FreeBSD, most of
the normal cases (defined in gcc.c) apply, and we also have -h* and
-z* options (for the linker). We have a slightly different mix. We
have -R (alias --rpath), no -z, --soname (-h), --assert etc. */
-z* options (for the linker) (comming from svr4).
We also have -R (alias --rpath), no -z, --soname (-h), --assert etc. */
#undef SWITCH_TAKES_ARG
#define SWITCH_TAKES_ARG(CHAR) \
( (CHAR) == 'D' \
|| (CHAR) == 'U' \
|| (CHAR) == 'o' \
|| (CHAR) == 'e' \
|| (CHAR) == 'T' \
|| (CHAR) == 'u' \
|| (CHAR) == 'I' \
|| (CHAR) == 'm' \
|| (CHAR) == 'L' \
|| (CHAR) == 'A' \
|| (CHAR) == 'h' \
|| (CHAR) == 'z' /* ignored by ld */ \
#define SWITCH_TAKES_ARG(CHAR) \
(DEFAULT_SWITCH_TAKES_ARG (CHAR) \
|| (CHAR) == 'h' \
|| (CHAR) == 'z' /* ignored by ld */ \
|| (CHAR) == 'R')
#undef WORD_SWITCH_TAKES_ARG
@ -60,9 +61,6 @@ Boston, MA 02111-1307, USA. */
|| !strcmp (STR, "soname") || !strcmp (STR, "defsym") \
|| !strcmp (STR, "assert") || !strcmp (STR, "dynamic-linker"))
#undef TARGET_VERSION
#define TARGET_VERSION fprintf (stderr, " (i386 FreeBSD)");
#define MASK_PROFILER_EPILOGUE 010000000000
#define MASK_AOUT 004000000000 /* a.out not elf */
#define MASK_UNDERSCORES 002000000000 /* use leading _ */
@ -81,12 +79,6 @@ Boston, MA 02111-1307, USA. */
{ "underscores", MASK_UNDERSCORES}, \
{ "no-underscores", -MASK_UNDERSCORES},
/* The svr4 ABI for the i386 says that records and unions are returned
in memory. */
/* On FreeBSD, we do not. */
#undef DEFAULT_PCC_STRUCT_RETURN
#define DEFAULT_PCC_STRUCT_RETURN 0
/* Prefix for internally generated assembler labels. If we aren't using
underscores, we are using prefix `.'s to identify labels that should
be ignored, as in `i386/gas.h' --karl@cs.umb.edu */
@ -106,6 +98,8 @@ Boston, MA 02111-1307, USA. */
#undef ASM_APP_OFF
#define ASM_APP_OFF "#NO_APP\n"
#define SET_ASM_OP ".set"
/* Output at beginning of assembler file. */
/* The .file command should always begin the output. */
@ -153,29 +147,28 @@ Boston, MA 02111-1307, USA. */
This is only used for PIC code. See comments by the `casesi' insn in
i386.md for an explanation of the expression this outputs. */
#undef ASM_OUTPUT_ADDR_DIFF_ELT
#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL) \
#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
fprintf (FILE, "\t.long _GLOBAL_OFFSET_TABLE_+[.-%s%d]\n", LPREFIX, VALUE)
#undef ASM_OUTPUT_ALIGN
#define ASM_OUTPUT_ALIGN(FILE,LOG) \
if ((LOG)!=0) fprintf ((FILE), "\t.p2align %d\n", (LOG))
/* Align labels, etc. at 4-byte boundaries.
For the 486, align to 16-byte boundary for sake of cache. */
#undef ASM_OUTPUT_ALIGN_CODE
#define ASM_OUTPUT_ALIGN_CODE(FILE) \
fprintf ((FILE), "\t.p2align %d,0x90\n", i386_align_jumps)
/* Align start of loop at 4-byte boundary. */
#undef ASM_OUTPUT_LOOP_ALIGN
#define ASM_OUTPUT_LOOP_ALIGN(FILE) \
fprintf ((FILE), "\t.p2align %d,0x90\n", i386_align_loops)
#define ASM_OUTPUT_ALIGN(FILE,LOG) \
if ((LOG)!=0) { \
if (in_text_section()) \
fprintf ((FILE), "\t.p2align %d,0x90\n", (LOG)); \
else \
fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
}
/* conditionalize the use of ".section rodata" on elf mode - otherwise .text */
#undef USE_CONST_SECTION
#define USE_CONST_SECTION TARGET_ELF
/* The a.out tools do not support "linkonce" sections. */
#define SUPPORTS_ONE_ONLY TARGET_ELF
/* The a.out tools do not support "Lscope" .stabs symbols. */
#define NO_DBX_FUNCTION_END TARGET_AOUT
/* A C statement (sans semicolon) to output an element in the table of
global constructors. */
#undef ASM_OUTPUT_CONSTRUCTOR
@ -285,6 +278,16 @@ do { \
} \
} while (0)
#undef DEFAULT_VTABLE_THUNKS
#define DEFAULT_VTABLE_THUNKS 1
/* This is BSD, so we want the DBX format. */
#define DBX_DEBUGGING_INFO
/* Use stabs instead of DWARF debug format. */
#undef PREFERRED_DEBUGGING_TYPE
#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
/* in elf, the function stabs come first, before the relative offsets */
#undef DBX_FUNCTION_FIRST
#define DBX_CHECK_FUNCTION_FIRST TARGET_ELF
@ -335,13 +338,13 @@ do { \
/* Indicate that jump tables go in the text section. This is
necessary when compiling PIC code. */
#define JUMP_TABLES_IN_TEXT_SECTION
#define JUMP_TABLES_IN_TEXT_SECTION (flag_pic)
/* override the exception table positioning */
#define EXCEPTION_SECTION_FUNCTION \
#define EXCEPTION_SECTION() \
do { \
if (TARGET_ELF) { \
named_section (NULL_TREE, ".gcc_except_table"); \
named_section (NULL_TREE, ".gcc_except_table", 0); \
} else { \
if (flag_pic) \
data_section (); \
@ -358,12 +361,61 @@ do { \
VOIDmode, 0); \
} while (0)
/* Use dollar signs in special g++ assembler names. */
#undef NO_DOLLAR_IN_LABEL
/* Map i386 registers to the numbers dwarf expects. Of course this is different
from what stabs expects. */
/* Copy this from the svr4 specifications... */
/* Define the register numbers to be used in Dwarf debugging information.
The SVR4 reference port C compiler uses the following register numbers
in its Dwarf output code:
0 for %eax (gnu regno = 0)
1 for %ecx (gnu regno = 2)
2 for %edx (gnu regno = 1)
3 for %ebx (gnu regno = 3)
4 for %esp (gnu regno = 7)
5 for %ebp (gnu regno = 6)
6 for %esi (gnu regno = 4)
7 for %edi (gnu regno = 5)
The following three DWARF register numbers are never generated by
the SVR4 C compiler or by the GNU compilers, but SDB on x86/svr4
believes these numbers have these meanings.
8 for %eip (no gnu equivalent)
9 for %eflags (no gnu equivalent)
10 for %trapno (no gnu equivalent)
It is not at all clear how we should number the FP stack registers
for the x86 architecture. If the version of SDB on x86/svr4 were
a bit less brain dead with respect to floating-point then we would
have a precedent to follow with respect to DWARF register numbers
for x86 FP registers, but the SDB on x86/svr4 is so completely
broken with respect to FP registers that it is hardly worth thinking
of it as something to strive for compatibility with.
The version of x86/svr4 SDB I have at the moment does (partially)
seem to believe that DWARF register number 11 is associated with
the x86 register %st(0), but that's about all. Higher DWARF
register numbers don't seem to be associated with anything in
particular, and even for DWARF regno 11, SDB only seems to under-
stand that it should say that a variable lives in %st(0) (when
asked via an `=' command) if we said it was in DWARF regno 11,
but SDB still prints garbage when asked for the value of the
variable in question (via a `/' command).
(Also note that the labels SDB prints for various FP stack regs
when doing an `x' command are all wrong.)
Note that these problems generally don't affect the native SVR4
C compiler because it doesn't allow the use of -O with -g and
because when it is *not* optimizing, it allocates a memory
location for each floating-point variable, and the memory
location is what gets described in the DWARF AT_location
attribute for the variable in question.
Regardless of the severe mental illness of the x86/svr4 SDB, we
do something sensible here and we use the following DWARF
register numbers. Note that these are all stack-top-relative
numbers.
11 for %st(0) (gnu regno = 8)
12 for %st(1) (gnu regno = 9)
13 for %st(2) (gnu regno = 10)
14 for %st(3) (gnu regno = 11)
15 for %st(4) (gnu regno = 12)
16 for %st(5) (gnu regno = 13)
17 for %st(6) (gnu regno = 14)
18 for %st(7) (gnu regno = 15)
*/
#undef DWARF_DBX_REGISTER_NUMBER
#define DWARF_DBX_REGISTER_NUMBER(n) \
((n) == 0 ? 0 \
@ -405,10 +457,14 @@ do { \
#define FUNCTION_PROFILER(FILE, LABELNO) \
{ \
if (flag_pic) \
fprintf (FILE, "\tcall *%s@GOT(%%ebx)\n", \
{ \
fprintf (FILE, "\tcall *%s@GOT(%%ebx)\n", \
TARGET_AOUT ? "mcount" : ".mcount"); \
} \
else \
fprintf (FILE, "\tcall %s\n", TARGET_AOUT ? "mcount" : ".mcount"); \
{ \
fprintf (FILE, "\tcall %s\n", TARGET_AOUT ? "mcount" : ".mcount"); \
} \
}
#define FUNCTION_PROFILER_EPILOGUE(FILE) \
@ -437,47 +493,9 @@ do { \
#undef WCHAR_TYPE_SIZE
#define WCHAR_TYPE_SIZE BITS_PER_WORD
/* FREEBSD_NATIVE is defined when gcc is integrated into the FreeBSD
source tree so it can be configured appropriately without using
the GNU configure/build mechanism. */
#ifdef FREEBSD_NATIVE
/* Look for the include files in the system-defined places. */
#define GPLUSPLUS_INCLUDE_DIR "/usr/include/g++"
#define GCC_INCLUDE_DIR "/usr/include"
/* FreeBSD has GCC_INCLUDE_DIR first. */
#define INCLUDE_DEFAULTS \
{ \
{ GCC_INCLUDE_DIR, 0, 0 }, \
{ GPLUSPLUS_INCLUDE_DIR, 1, 1 }, \
{ 0, 0, 0 } \
}
/* Under FreeBSD, the normal location of the compiler back ends is the
/usr/libexec directory. */
#define STANDARD_EXEC_PREFIX "/usr/libexec/"
/* Under FreeBSD, the normal location of the various *crt*.o files is the
/usr/lib directory. */
#define STANDARD_STARTFILE_PREFIX "/usr/lib/"
/* On FreeBSD, gcc is called 'cc' */
#define GCC_NAME "cc"
/* FreeBSD is 4.4BSD derived */
#define bsd4_4
#endif /* FREEBSD_NATIVE */
#undef CPP_PREDEFINES
#define CPP_PREDEFINES "-Dunix -Di386 -D__FreeBSD__=4 -D__FreeBSD_cc_version=400001 -Asystem(unix) -Asystem(FreeBSD) -Acpu(i386) -Amachine(i386)"
#define CPP_PREDEFINES "-Di386 -Dunix -D__FreeBSD__=4 -D__FreeBSD_cc_version=400002 -Asystem(unix) -Asystem(FreeBSD) -Acpu(i386) -Amachine(i386)"
#undef CPP_SPEC
#if TARGET_CPU_DEFAULT == 2
@ -518,6 +536,9 @@ do { \
have the time to search for those flags. I am sure how to add
support for -soname shared_object_name. H.J.
I took out %{v:%{!V:-V}}. It is too much :-(. They can use
-Wl,-V.
When the -shared link option is used a final link is not being
done. */
@ -540,8 +561,19 @@ do { \
%{!dynamic-linker: -dynamic-linker /usr/libexec/ld-elf.so.1}} \
%{static:-Bstatic}}}"
/* Get perform_* macros to build libgcc.a. */
#include "i386/perform.h"
/* A C statement to output to the stdio stream FILE an assembler
command to advance the location counter to a multiple of 1<<LOG
bytes if it is within MAX_SKIP bytes.
This is used to align code labels according to Intel recommendations. */
#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
#error "we don't have this for the aout gas"
#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
if ((LOG)!=0) \
if ((MAX_SKIP)==0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP))
#endif
#undef STARTFILE_SPEC
#define STARTFILE_SPEC "\
@ -560,9 +592,9 @@ do { \
#define TARGET_DEFAULT (MASK_NO_FANCY_MATH_387 | 0301)
#define HAVE_ATEXIT
#define HAVE_PUTENV
/* to assist building libgcc2.c */
#ifndef __ELF__
#undef OBJECT_FORMAT_ELF
#endif
/* FreeBSD ELF using our home-grown crtbegin.o/crtend.o does not support the
DWARF2 unwinding mechanisms. Once `make world' bootstraping problems with
the EGCS crtstuff.c is overcome, we will switch to the non-sjlj-exceptions
type exception machanism. */
#define DWARF2_UNWIND_INFO 0