646d754d14
This commit builds on the previous series of commits to share the
target description caching code between GDB and gdbserver for
x86/Linux targets.
The objective of this commit is to move the four functions (2 each of)
i386_linux_read_description and amd64_linux_read_description into the
gdb/arch/ directory and combine them so we have just a single copy of
each. Then GDB, gdbserver, and the in-process-agent (IPA) will link
against these shared functions.
One curiosity with this patch is the function
x86_linux_post_init_tdesc. On the gdbserver side the two functions
amd64_linux_read_description and i386_linux_read_description have some
functionality that is not present on the GDB side, there is some
additional configuration that is performed as each target description
is created, to setup the expedited registers.
To support this I've added the function x86_linux_post_init_tdesc.
This function is called from the two *_linux_read_description
functions, but is implemented separately for GDB and gdbserver.
An alternative approach that avoids adding x86_linux_post_init_tdesc
would be to have x86_linux_tdesc_for_tid return a non-const target
description, then in x86_target::low_arch_setup we could inspect the
target description to figure out if it is 64-bit or not, and modify
the target description as needed. In the end I think that adding the
x86_linux_post_init_tdesc function is the simpler solution.
The contents of gdbserver/linux-x86-low.cc have moved to
gdb/arch/x86-linux-tdesc-features.c, and gdbserver/linux-x86-tdesc.h
has moved to gdb/arch/x86-linux-tdesc-features.h, this change leads to
some updates in the #includes in the gdbserver/ directory.
This commit also changes how target descriptions are cached.
Previously both GDB and gdbserver used static C-style arrays to act as
the tdesc cache. This was fine, except for two problems. Either the
C-style arrays would need to be placed in x86-linux-tdesc-features.c,
which would allow us to use the x86_linux_*_tdesc_count_1() functions
to size the arrays for us, or we'd need to hard code the array sizes
using separate #defines, which we'd then have to keep in sync with the
rest of the code in x86-linux-tdesc-features.c.
Given both of these problems I decided a better solution would be to
just switch to using a std::unordered_map to act as the cache. This
will resize automatically, and we can use the xcr0 value as the key.
At first inspection, using xcr0 might seem to be a problem; after all
the {i386,amd64}_create_target_description functions take more than
just the xcr0 value. However, this patch is only for x86/Linux
targets, and for x86/Linux all of the other flags passed to the tdesc
creation functions have constant values and so are irrelevant when we
consider tdesc caching.
For testing I've done the following:
- Built on x86-64 GNU/Linux for all targets, and just for the native
target,
- Build on i386 GNU/Linux for all targets, and just for the native
target,
- Build on a 64-bit, non-x86 GNU/Linux for all targets, just for the
native target, and for targets x86_64-*-linux and i386-*-linux.
Approved-By: Felix Willgerodt <felix.willgerodt@intel.com>
508 lines
13 KiB
Bash
508 lines
13 KiB
Bash
# ; -*- mode: sh ; -*-
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# Copyright (C) 2013-2024 Free Software Foundation, Inc.
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#
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# This file is part of GDB.
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#
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# This program 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 3 of the License, or
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# (at your option) any later version.
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#
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# This program 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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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Variables defined here:
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#
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# NAT_FILE - The header file with definitions for this native target.
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#
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# NATDEPFILES - Source files required for native debugging on this
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# native target.
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#
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# NAT_CDEPS - Dynamic symbols to be exported for libthread_db.
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#
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# LOADLIBES - Libraries against which GDB will be linked for this
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# native target.
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#
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# MH_CFLAGS - Additional CFLAGS for this host.
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#
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# XM_CLIBS - Host-dependent libraries against which GDB will be linked
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# for this native target.
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#
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# HAVE_NATIVE_GCORE_HOST - Whether gcore should be installed on this
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# native target.
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#
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# nat_makefile_frag - Name of the (optional) Makefile fragment file
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# required to build the native target. The
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# fragment is incorporated into the Makefile that
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# configure constructs from Makefile.in.
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#
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# Notes:
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#
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# - To avoid shell expansion of variables, declare them with single
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# quotes.
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#
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# - nat_makefile_frag must contain the full path of the file.
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# This first case is useful for filling default values for each
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# gdb_host.
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case ${gdb_host} in
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*linux*)
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NAT_FILE='config/nm-linux.h'
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NATDEPFILES='inf-ptrace.o fork-child.o nat/fork-inferior.o \
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proc-service.o \
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linux-thread-db.o linux-nat.o nat/linux-osdata.o linux-fork.o \
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nat/linux-procfs.o nat/linux-ptrace.o nat/linux-waitpid.o \
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nat/linux-personality.o nat/linux-namespaces.o'
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NAT_CDEPS='$(srcdir)/proc-service.list'
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LOADLIBES='-ldl $(RDYNAMIC)'
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;;
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fbsd*)
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NATDEPFILES='fork-child.o nat/fork-inferior.o inf-ptrace.o fbsd-nat.o'
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HAVE_NATIVE_GCORE_HOST=1
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LOADLIBES='-lkvm'
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;;
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nbsd*)
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NATDEPFILES='fork-child.o nat/fork-inferior.o nat/netbsd-nat.o inf-ptrace.o'
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HAVE_NATIVE_GCORE_HOST=1
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;;
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obsd*)
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NATDEPFILES='fork-child.o nat/fork-inferior.o inf-ptrace.o'
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;;
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cygwin*)
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NATDEPFILES='x86-nat.o nat/x86-dregs.o windows-nat.o nat/windows-nat.o'
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;;
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mingw*)
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NATDEPFILES='x86-nat.o nat/x86-dregs.o windows-nat.o nat/windows-nat.o'
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;;
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aix)
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NATDEPFILES='nat/fork-inferior.o fork-child.o inf-ptrace.o'
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;;
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darwin)
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NATDEPFILES='fork-child.o nat/fork-inferior.o darwin-nat.o \
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darwin-nat-info.o'
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;;
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sol2)
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NATDEPFILES='fork-child.o nat/fork-inferior.o \
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procfs.o proc-api.o proc-events.o proc-flags.o proc-why.o \
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sol-thread.o'
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HAVE_NATIVE_GCORE_HOST=1
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;;
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esac
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# This is where we actually filter by host and host CPU.
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case ${gdb_host} in
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aix)
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case ${gdb_host_cpu} in
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powerpc)
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# Host: IBM PowerPC running AIX aix-thread.o is not
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# listed in NATDEPFILES as it is pulled in by
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# configure.
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NATDEPFILES="${NATDEPFILES} rs6000-aix-nat.o"
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# When compiled with cc, for debugging, this argument
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# should be passed. We have no idea who our current
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# compiler is though, so we skip it.
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# MH_CFLAGS='-bnodelcsect'
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;;
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esac
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;;
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alpha-linux)
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case ${gdb_host_cpu} in
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alpha)
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# Host: Little-endian Alpha running Linux
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NATDEPFILES="${NATDEPFILES} linux-nat-trad.o alpha-linux-nat.o"
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# doublest.c currently assumes some properties of FP arithmetic
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# on the host which require this.
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MH_CFLAGS='-mieee'
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;;
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esac
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;;
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cygwin)
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case ${gdb_host_cpu} in
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i386)
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# Native config information for GDB on i386
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# systems running Cygwin.
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NATDEPFILES="${NATDEPFILES} i386-windows-nat.o"
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;;
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esac
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;;
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cygwin64)
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case ${gdb_host_cpu} in
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i386)
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# Native config information for GDB on amd64
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# systems running Cygwin.
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NATDEPFILES="${NATDEPFILES} i386-windows-nat.o amd64-windows-nat.o"
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;;
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esac
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;;
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darwin)
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case ${gdb_host_cpu} in
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i386)
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# Host: IA86 running Darwin
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NATDEPFILES="${NATDEPFILES} i386-darwin-nat.o x86-nat.o \
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nat/x86-dregs.o amd64-nat.o"
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;;
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esac
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;;
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fbsd)
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case ${gdb_host_cpu} in
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aarch64)
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# Host: FreeBSD/aarch64
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NATDEPFILES="${NATDEPFILES} aarch64-nat.o \
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nat/aarch64-hw-point.o aarch64-fbsd-nat.o"
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LOADLIBES=
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;;
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arm)
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# Host: FreeBSD/arm
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NATDEPFILES="${NATDEPFILES} arm-fbsd-nat.o"
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LOADLIBES=
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;;
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i386)
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# Host: FreeBSD/i386
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NATDEPFILES="${NATDEPFILES} x86-nat.o nat/x86-dregs.o \
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nat/x86-xstate.o x86-bsd-nat.o x86-fbsd-nat.o i386-fbsd-nat.o \
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bsd-kvm.o"
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;;
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mips)
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# Host: FreeBSD/mips
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NATDEPFILES="${NATDEPFILES} mips-fbsd-nat.o"
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LOADLIBES=
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;;
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powerpc)
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# Native config information for GDB on PowerPC
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# systems running FreeBSD.
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NATDEPFILES="${NATDEPFILES} ppc-fbsd-nat.o bsd-kvm.o"
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;;
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riscv*)
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# Host: FreeBSD/riscv
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NATDEPFILES="${NATDEPFILES} riscv-fbsd-nat.o"
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;;
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sparc)
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# Host: FreeBSD/sparc64
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NATDEPFILES="${NATDEPFILES} sparc-nat.o sparc64-nat.o \
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sparc64-fbsd-nat.o bsd-kvm.o"
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;;
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esac
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;;
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fbsd64)
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case ${gdb_host_cpu} in
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i386)
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# Host: FreeBSD/amd64
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NATDEPFILES="${NATDEPFILES} amd64-nat.o \
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amd64-fbsd-nat.o bsd-kvm.o x86-nat.o nat/x86-dregs.o \
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nat/x86-xstate.o x86-bsd-nat.o x86-fbsd-nat.o"
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;;
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esac
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;;
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go32)
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case ${gdb_host_cpu} in
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i386)
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# Host: Intel x86 running DJGPP
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# We include several header files from config/djgpp
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MH_CFLAGS='-I$(srcdir)/config/djgpp'
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NATDEPFILES='go32-nat.o x86-nat.o nat/x86-dregs.o'
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XM_CLIBS='-ldbg'
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;;
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esac
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;;
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i386gnu)
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case ${gdb_host_cpu} in
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i386)
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# Host: Intel 386 running the GNU Hurd
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NATDEPFILES='i386-gnu-nat.o gnu-nat.o \
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x86-nat.o nat/x86-dregs.o fork-child.o \
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nat/fork-inferior.o \
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notify_S.o process_reply_S.o msg_reply_S.o \
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msg_U.o exc_request_U.o exc_request_S.o'
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HAVE_NATIVE_GCORE_HOST=1
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NAT_FILE='nm-i386gnu.h'
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MH_CFLAGS='-D_GNU_SOURCE'
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XM_CLIBS='-lshouldbeinlibc'
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nat_makefile_frag="${srcdir}/config/${gdb_host_cpu}/i386gnu.mn"
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;;
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esac
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;;
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linux)
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case ${gdb_host_cpu} in
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aarch64)
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# Host: AArch64 based machine running GNU/Linux
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NATDEPFILES="${NATDEPFILES} aarch64-nat.o aarch64-linux-nat.o \
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aarch32-linux-nat.o nat/aarch64-hw-point.o \
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nat/aarch64-linux-hw-point.o \
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nat/aarch64-linux.o \
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nat/aarch64-scalable-linux-ptrace.o \
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nat/aarch64-mte-linux-ptrace.o"
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;;
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arc)
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# Host: ARC based machine running GNU/Linux
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NATDEPFILES="${NATDEPFILES} arc-linux-nat.o"
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;;
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arm)
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# Host: ARM based machine running GNU/Linux
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NATDEPFILES="${NATDEPFILES} arm-linux-nat.o \
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aarch32-linux-nat.o"
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;;
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i386)
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# Host: Intel 386 running GNU/Linux.
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NATDEPFILES="${NATDEPFILES} x86-nat.o nat/x86-dregs.o \
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nat/x86-xstate.o \
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i386-linux-nat.o x86-linux-nat.o nat/linux-btrace.o \
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nat/x86-linux.o nat/x86-linux-dregs.o nat/i386-linux.o \
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nat/x86-linux-tdesc.o arch/i386-linux-tdesc.o \
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arch/x86-linux-tdesc-features.o"
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;;
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ia64)
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# Host: Intel IA-64 running GNU/Linux
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NATDEPFILES="${NATDEPFILES} ia64-linux-nat.o"
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;;
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loongarch)
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# Host: LoongArch, running GNU/Linux.
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NATDEPFILES="${NATDEPFILES} loongarch-linux-nat.o linux-nat-trad.o"
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;;
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m32r)
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# Host: M32R based machine running GNU/Linux
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NATDEPFILES="${NATDEPFILES} m32r-linux-nat.o"
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;;
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m68k)
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# Host: Motorola m68k running GNU/Linux.
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NATDEPFILES="${NATDEPFILES} m68k-linux-nat.o"
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;;
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mips)
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# Host: Linux/MIPS
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NATDEPFILES="${NATDEPFILES} linux-nat-trad.o \
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mips-linux-nat.o nat/mips-linux-watch.o"
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;;
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or1k)
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# Host: Linux/OpenRISC
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NATDEPFILES="${NATDEPFILES} or1k-linux-nat.o"
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;;
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pa)
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# Host: Hewlett-Packard PA-RISC machine, running Linux
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NATDEPFILES="${NATDEPFILES} hppa-linux-nat.o"
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;;
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powerpc)
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# Host: PowerPC, running Linux
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NATDEPFILES="${NATDEPFILES} ppc-linux-nat.o nat/ppc-linux.o"
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;;
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riscv*)
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# Host: RISC-V, running Linux
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NATDEPFILES="${NATDEPFILES} riscv-linux-nat.o \
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nat/riscv-linux-tdesc.o"
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;;
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s390)
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# Host: S390, running Linux
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NATDEPFILES="${NATDEPFILES} s390-linux-nat.o"
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;;
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sparc)
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# Host: GNU/Linux SPARC
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NATDEPFILES="${NATDEPFILES} sparc-nat.o sparc-linux-nat.o"
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;;
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tilegx)
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# Host: Tilera TILE-Gx running GNU/Linux.
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NATDEPFILES="${NATDEPFILES} tilegx-linux-nat.o"
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NAT_CDEPS=
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;;
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xtensa)
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# Host: Xtensa, running GNU/Linux.
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NATDEPFILES="${NATDEPFILES} xtensa-linux-nat.o"
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;;
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esac
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;;
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linux64)
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case ${gdb_host_cpu} in
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i386)
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# Host: GNU/Linux x86-64
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NATDEPFILES="${NATDEPFILES} x86-nat.o nat/x86-dregs.o \
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nat/x86-xstate.o amd64-nat.o amd64-linux-nat.o x86-linux-nat.o \
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nat/linux-btrace.o \
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nat/x86-linux.o nat/x86-linux-dregs.o nat/x86-linux-tdesc.o \
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nat/amd64-linux-siginfo.o arch/x86-linux-tdesc-features.o \
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arch/i386-linux-tdesc.o arch/amd64-linux-tdesc.o"
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;;
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sparc)
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# Host: GNU/Linux UltraSPARC
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NATDEPFILES="${NATDEPFILES} sparc-nat.o sparc64-nat.o \
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sparc64-linux-nat.o"
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;;
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esac
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;;
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mingw)
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case ${gdb_host_cpu} in
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i386)
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NATDEPFILES="${NATDEPFILES} i386-windows-nat.o"
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;;
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esac
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;;
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mingw64)
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case ${gdb_host_cpu} in
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i386)
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NATDEPFILES="${NATDEPFILES} i386-windows-nat.o amd64-windows-nat.o"
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;;
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esac
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;;
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nbsd)
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case ${gdb_host_cpu} in
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alpha)
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# Host: NetBSD/alpha
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NATDEPFILES="${NATDEPFILES} alpha-bsd-nat.o bsd-kvm.o"
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LOADLIBES='-lkvm'
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;;
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mips)
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# Host: NetBSD/mips
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NATDEPFILES="${NATDEPFILES} mips-netbsd-nat.o"
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;;
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pa)
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# Host: NetBSD/hppa
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NATDEPFILES="${NATDEPFILES} netbsd-nat.o hppa-netbsd-nat.o"
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;;
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powerpc)
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# Host: NetBSD/powerpc
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NATDEPFILES="${NATDEPFILES} ppc-netbsd-nat.o bsd-kvm.o"
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LOADLIBES='-lkvm'
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;;
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sh)
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# Host: NetBSD/sh
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NATDEPFILES="${NATDEPFILES} sh-netbsd-nat.o"
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;;
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esac
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;;
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nbsd64)
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case ${gdb_host_cpu} in
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i386)
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# Host: NetBSD/amd64
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NATDEPFILES="${NATDEPFILES} netbsd-nat.o amd64-nat.o x86-nat.o \
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nat/x86-dregs.o x86-bsd-nat.o amd64-bsd-nat.o amd64-netbsd-nat.o"
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;;
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sparc)
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# Host: NetBSD/sparc64
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NATDEPFILES="${NATDEPFILES} sparc64-netbsd-nat.o sparc-nat.o \
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bsd-kvm.o"
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LOADLIBES='-lkvm'
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;;
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esac
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;;
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nbsdelf)
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case ${gdb_host_cpu} in
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arm)
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# Host: NetBSD/arm
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NATDEPFILES="${NATDEPFILES} arm-netbsd-nat.o"
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;;
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i386)
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# Host: NetBSD/i386 ELF
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NATDEPFILES="${NATDEPFILES} netbsd-nat.o x86-nat.o \
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nat/x86-dregs.o \
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x86-bsd-nat.o i386-bsd-nat.o i386-netbsd-nat.o bsd-kvm.o"
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LOADLIBES='-lkvm'
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;;
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m68k)
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# Host: NetBSD/m68k ELF
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NATDEPFILES="${NATDEPFILES} m68k-bsd-nat.o bsd-kvm.o"
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LOADLIBES='-lkvm'
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;;
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sparc)
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# Host: NetBSD/sparc ELF
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|
NATDEPFILES="${NATDEPFILES} sparc-nat.o sparc-netbsd-nat.o \
|
|
bsd-kvm.o"
|
|
LOADLIBES='-lkvm'
|
|
;;
|
|
vax)
|
|
# Host: NetBSD/vax ELF
|
|
NATDEPFILES="${NATDEPFILES} vax-bsd-nat.o bsd-kvm.o"
|
|
LOADLIBES='-lkvm'
|
|
;;
|
|
|
|
esac
|
|
;;
|
|
nto)
|
|
case ${gdb_host_cpu} in
|
|
i386)
|
|
# Host: Intel 386 running QNX.
|
|
NATDEPFILES='nto-procfs.o'
|
|
NAT_FILE='config/nm-nto.h'
|
|
;;
|
|
esac
|
|
;;
|
|
obsd)
|
|
case ${gdb_host_cpu} in
|
|
i386)
|
|
# Host: OpenBSD/i386 ELF
|
|
NATDEPFILES="${NATDEPFILES} obsd-nat.o x86-bsd-nat.o \
|
|
i386-bsd-nat.o i386-obsd-nat.o bsd-kvm.o"
|
|
LOADLIBES='-lkvm'
|
|
;;
|
|
m68k)
|
|
# Host: OpenBSD/m68k
|
|
NATDEPFILES="${NATDEPFILES} m68k-bsd-nat.o bsd-kvm.o"
|
|
LOADLIBES='-lkvm'
|
|
;;
|
|
pa)
|
|
# Host: OpenBSD/hppa
|
|
NATDEPFILES="${NATDEPFILES} obsd-nat.o hppa-obsd-nat.o"
|
|
;;
|
|
powerpc)
|
|
# Host: OpenBSD/powerpc
|
|
NATDEPFILES="${NATDEPFILES} obsd-nat.o ppc-obsd-nat.o bsd-kvm.o"
|
|
LOADLIBES='-lkvm'
|
|
;;
|
|
vax)
|
|
# Host: OpenBSD/vax
|
|
NATDEPFILES="${NATDEPFILES} vax-bsd-nat.o bsd-kvm.o"
|
|
LOADLIBES='-lkvm'
|
|
;;
|
|
esac
|
|
;;
|
|
obsd64)
|
|
case ${gdb_host_cpu} in
|
|
i386)
|
|
# Host: OpenBSD/amd64
|
|
NATDEPFILES="${NATDEPFILES} obsd-nat.o amd64-nat.o \
|
|
x86-bsd-nat.o amd64-bsd-nat.o amd64-obsd-nat.o bsd-kvm.o"
|
|
LOADLIBES='-lkvm'
|
|
;;
|
|
mips)
|
|
# Host: OpenBSD/mips64
|
|
NATDEPFILES="${NATDEPFILES} obsd-nat.o mips64-obsd-nat.o"
|
|
;;
|
|
sparc)
|
|
# Host: OpenBSD/sparc64
|
|
NATDEPFILES="${NATDEPFILES} obsd-nat.o sparc64-obsd-nat.o \
|
|
sparc-nat.o bsd-kvm.o"
|
|
LOADLIBES='-lkvm'
|
|
;;
|
|
esac
|
|
;;
|
|
ppc64-linux)
|
|
case ${gdb_host_cpu} in
|
|
powerpc)
|
|
# Host: PowerPC64, running Linux
|
|
XM_CLIBS=
|
|
NATDEPFILES="${NATDEPFILES} ppc-linux-nat.o nat/ppc-linux.o"
|
|
;;
|
|
esac
|
|
;;
|
|
sol2)
|
|
case ${gdb_host_cpu} in
|
|
i386)
|
|
# Host: Solaris x86_64
|
|
NATDEPFILES="${NATDEPFILES} \
|
|
amd64-nat.o i386-sol2-nat.o"
|
|
;;
|
|
sparc)
|
|
# Host: Solaris SPARC & UltraSPARC
|
|
NAT_FILE='nm-sol2.h'
|
|
NATDEPFILES="${NATDEPFILES} sparc-sol2-nat.o"
|
|
;;
|
|
esac
|
|
;;
|
|
esac
|