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Configuration changes to support FreeBSD. The linker only works for

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ELF, not a.out.  But all the other tools support both.  I'm not so
sure about the assembler -- it might need more work.
This commit is contained in:
jdp 1998-03-01 23:26:32 +00:00
parent 96d45f0ff6
commit 082b767ff5
8 changed files with 84 additions and 23 deletions
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77
contrib/binutils/bfd/freebsd.h
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@ -1,4 +1,4 @@
/* BFD back-end definitions used by all FreeBSD targets.
/* BFD back-end definitions used by all FreeBSD a.out targets.
Copyright (C) 1990, 1991, 1992, 1996 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
@ -18,26 +18,33 @@ along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* FreeBSD ZMAGIC files never have the header in the text. */
#define N_HEADER_IN_TEXT(x) 0
/* FreeBSD QMAGIC files have the header in the text. */
#define N_HEADER_IN_TEXT(x) 1
#define MY_text_includes_header 1
/* ZMAGIC files start at offset 0. Does not apply to QMAGIC files. */
#define TEXT_START_ADDR 0
#define TEXT_START_ADDR (TARGET_PAGE_SIZE + 0x20)
#define N_GETMAGIC_NET(exec) \
((exec).a_info & 0xffff)
#define N_GETMID_NET(exec) \
(((exec).a_info >> 16) & 0x3ff)
#define N_GETFLAG_NET(ex) \
(((exec).a_info >> 26) & 0x3f)
/*
* FreeBSD uses a weird mix of byte orderings for its a_info field.
* Its assembler emits NetBSD style object files, with a big-endian
* a_info. Its linker seems to accept either byte ordering, but
* emits a little-endian a_info.
*
* Here, we accept either byte ordering, but always produce
* little-endian.
*
* FIXME - Probably we should always produce the _native_ byte
* ordering. I.e., it should be in the architecture-specific
* file, not here. But in reality, there is almost zero chance
* that FreeBSD will ever use a.out in a new port.
*/
#define N_MACHTYPE(exec) \
((enum machine_type) \
((N_GETMAGIC_NET (exec) == ZMAGIC) ? N_GETMID_NET (exec) : \
((exec).a_info >> 16) & 0x3ff))
((freebsd_swap_magic(&(exec).a_info) >> 16) & 0x3ff))
#define N_FLAGS(exec) \
((N_GETMAGIC_NET (exec) == ZMAGIC) ? N_GETFLAG_NET (exec) : \
((exec).a_info >> 26) & 0x3f)
((enum machine_type) \
((freebsd_swap_magic(&(exec).a_info) >> 26) & 0x3f))
#define N_SET_INFO(exec, magic, type, flags) \
((exec).a_info = ((magic) & 0xffff) \
@ -55,22 +62,50 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#include "libbfd.h"
#include "libaout.h"
/* On FreeBSD, the magic number is always in ntohl's "network" (big-endian)
format. I think. */
#define SWAP_MAGIC(ext) bfd_getb32 (ext)
#define SWAP_MAGIC(ext) (freebsd_swap_magic(ext))
#define MY_bfd_final_link freebsd_bfd_final_link
#define MY_write_object_contents freebsd_write_object_contents
#define MY_write_object_contents MY(write_object_contents)
static boolean MY(write_object_contents) PARAMS ((bfd *abfd));
static boolean freebsd_bfd_final_link PARAMS ((bfd *, struct bfd_link_info *));
static long freebsd_swap_magic PARAMS ((void *ext));
static boolean freebsd_write_object_contents PARAMS ((bfd *abfd));
#include "aout-target.h"
static boolean
freebsd_bfd_final_link(abfd, info)
bfd *abfd;
struct bfd_link_info *info;
{
obj_aout_subformat (abfd) = q_magic_format;
return NAME(aout,final_link) (abfd, info, MY_final_link_callback);
}
/* Swap a magic number. We accept either endian, whichever looks valid. */
static long
freebsd_swap_magic(ext)
void *ext;
{
long linfo = bfd_getl32(ext);
long binfo = bfd_getb32(ext);
int lmagic = linfo & 0xffff;
int bmagic = binfo & 0xffff;
int lmagic_ok = lmagic == OMAGIC || lmagic == NMAGIC ||
lmagic == ZMAGIC || lmagic == QMAGIC;
int bmagic_ok = bmagic == OMAGIC || bmagic == NMAGIC ||
bmagic == ZMAGIC || bmagic == QMAGIC;
return bmagic_ok && !lmagic_ok ? binfo : linfo;
}
/* Write an object file.
Section contents have already been written. We write the
file header, symbols, and relocation. */
static boolean
MY(write_object_contents) (abfd)
freebsd_write_object_contents(abfd)
bfd *abfd;
{
struct external_exec exec_bytes;

3
contrib/binutils/gas/config/tc-i386.h
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@ -69,6 +69,9 @@ extern int tc_i386_fix_adjustable PARAMS ((struct fix *));
#define TARGET_ARCH bfd_arch_i386
#ifdef OBJ_AOUT
#ifdef TE_FreeBSD
#define TARGET_FORMAT "a.out-i386-freebsd"
#endif
#ifdef TE_NetBSD
#define TARGET_FORMAT "a.out-i386-netbsd"
#endif

8
contrib/binutils/gas/config/te-freebsd.h Normal file
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@ -0,0 +1,8 @@
/*
* Target environment for FreeBSD. It is the same as the generic
* target, except it arranges to suppress the use of "/" as a comment
* character. Some code in the FreeBSD kernel uses "/" to mean
* division. (What a concept.)
*/
#define TE_FreeBSD 1
#include "te-generic.h"

4
contrib/binutils/gas/configure vendored
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@ -817,8 +817,10 @@ for this_target in $target $canon_targets ; do
i386-*-linux*) fmt=elf em=linux ;;
i386-*-lynxos*) fmt=coff targ=i386coff
em=lynx ;;
i386-*-sysv4* | i386-*-solaris* | i386-*-elf | i386-*-freebsdelf*)
i386-*-sysv4* | i386-*-solaris* | i386-*-elf)
fmt=elf ;;
i386-*-freebsdelf*) fmt=elf em=freebsd ;;
i386-*-freebsd*) fmt=aout em=freebsd bfd_gas=yes ;;
i386-*-sco*elf*) fmt=elf targ=sco5 ;;
i386-*-coff | i386-*-sysv* | i386-*-sco* | i386-*-isc*)
fmt=coff targ=i386coff ;;

4
contrib/binutils/gas/configure.in
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@ -160,8 +160,10 @@ changequote([,])dnl
i386-*-linux*) fmt=elf em=linux ;;
i386-*-lynxos*) fmt=coff targ=i386coff
em=lynx ;;
i386-*-sysv4* | i386-*-solaris* | i386-*-elf | i386-*-freebsdelf*)
i386-*-sysv4* | i386-*-solaris* | i386-*-elf)
fmt=elf ;;
i386-*-freebsdelf*) fmt=elf em=freebsd ;;
i386-*-freebsd*) fmt=aout em=freebsd bfd_gas=yes ;;
i386-*-sco*elf*) fmt=elf targ=sco5 ;;
i386-*-coff | i386-*-sysv* | i386-*-sco* | i386-*-isc*)
fmt=coff targ=i386coff ;;

4
contrib/binutils/ld/Makefile.in
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@ -235,6 +235,7 @@ ALL_EMULATIONS = \
ei386aout.o \
ei386bsd.o \
ei386coff.o \
ei386freebsd.o \
ei386go32.o \
ei386linux.o \
ei386lynx.o \
@ -480,6 +481,9 @@ ei386bsd.c: $(srcdir)/emulparams/i386bsd.sh \
ei386coff.c: $(srcdir)/emulparams/i386coff.sh \
$(srcdir)/emultempl/generic.em $(srcdir)/scripttempl/i386coff.sc ${GEN_DEPENDS}
${GENSCRIPTS} i386coff "$(tdir_i386coff)"
ei386freebsd.c: $(srcdir)/emulparams/i386freebsd.sh \
$(srcdir)/emultempl/generic.em $(srcdir)/scripttempl/aout.sc ${GEN_DEPENDS}
${GENSCRIPTS} i386freebsd "$(tdir_i386freebsd)"
ei386go32.c: $(srcdir)/emulparams/i386go32.sh \
$(srcdir)/emultempl/generic.em $(srcdir)/scripttempl/i386go32.sc ${GEN_DEPENDS}
${GENSCRIPTS} i386go32 "$(tdir_i386go32)"

1
contrib/binutils/ld/configure.tgt
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@ -77,6 +77,7 @@ i[3456]86-*-netbsd*) targ_emul=i386nbsd ;;
i[3456]86-*-netware) targ_emul=i386nw ;;
i[3456]86-*-elf*) targ_emul=elf_i386 ;;
i[3456]86-*-freebsdelf*) targ_emul=elf_i386 ;;
i[3456]86-*-freebsd*) targ_emul=i386freebsd ;;
i[3456]86-*-sysv*) targ_emul=i386coff ;;
i[3456]86-*-ptx*) targ_emul=i386coff ;;
i[3456]86-*-mach*) targ_emul=i386mach ;;

6
contrib/binutils/ld/emulparams/i386freebsd.sh Normal file
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@ -0,0 +1,6 @@
SCRIPT_NAME=aout
TEXT_START_ADDR=0x1020
OUTPUT_FORMAT="a.out-i386-freebsd"
TARGET_PAGE_SIZE=0x1000
ARCH=i386
EXECUTABLE_SYMBOLS='__DYNAMIC = 0;'