2015-10-21 17:13:41 +02:00
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/* Common target dependent code for GDB on ARM systems.
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2019-01-01 07:01:51 +01:00
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Copyright (C) 1988-2019 Free Software Foundation, Inc.
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2015-10-21 17:13:41 +02:00
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This file is part of GDB.
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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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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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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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Rename common to gdbsupport
This is the next patch in the ongoing series to move gdbsever to the
top level.
This patch just renames the "common" directory. The idea is to do
this move in two parts: first rename the directory (this patch), then
move the directory to the top. This approach makes the patches a bit
more tractable.
I chose the name "gdbsupport" for the directory. However, as this
patch was largely written by sed, we could pick a new name without too
much difficulty.
Tested by the buildbot.
gdb/ChangeLog
2019-07-09 Tom Tromey <tom@tromey.com>
* contrib/ari/gdb_ari.sh: Change common to gdbsupport.
* configure: Rebuild.
* configure.ac: Change common to gdbsupport.
* gdbsupport: Rename from common.
* acinclude.m4: Change common to gdbsupport.
* Makefile.in (CONFIG_SRC_SUBDIR, COMMON_SFILES)
(HFILES_NO_SRCDIR, stamp-version, ALLDEPFILES): Change common to
gdbsupport.
* aarch64-tdep.c, ada-lang.c, ada-lang.h, agent.c, alloc.c,
amd64-darwin-tdep.c, amd64-dicos-tdep.c, amd64-fbsd-nat.c,
amd64-fbsd-tdep.c, amd64-linux-nat.c, amd64-linux-tdep.c,
amd64-nbsd-tdep.c, amd64-obsd-tdep.c, amd64-sol2-tdep.c,
amd64-tdep.c, amd64-windows-tdep.c, arch-utils.c,
arch/aarch64-insn.c, arch/aarch64.c, arch/aarch64.h, arch/amd64.c,
arch/amd64.h, arch/arm-get-next-pcs.c, arch/arm-linux.c,
arch/arm.c, arch/i386.c, arch/i386.h, arch/ppc-linux-common.c,
arch/riscv.c, arch/riscv.h, arch/tic6x.c, arm-tdep.c, auto-load.c,
auxv.c, ax-gdb.c, ax-general.c, ax.h, breakpoint.c, breakpoint.h,
btrace.c, btrace.h, build-id.c, build-id.h, c-lang.h, charset.c,
charset.h, cli/cli-cmds.c, cli/cli-cmds.h, cli/cli-decode.c,
cli/cli-dump.c, cli/cli-option.h, cli/cli-script.c,
coff-pe-read.c, command.h, compile/compile-c-support.c,
compile/compile-c.h, compile/compile-cplus-symbols.c,
compile/compile-cplus-types.c, compile/compile-cplus.h,
compile/compile-loc2c.c, compile/compile.c, completer.c,
completer.h, contrib/ari/gdb_ari.sh, corefile.c, corelow.c,
cp-support.c, cp-support.h, cp-valprint.c, csky-tdep.c, ctf.c,
darwin-nat.c, debug.c, defs.h, disasm-selftests.c, disasm.c,
disasm.h, dtrace-probe.c, dwarf-index-cache.c,
dwarf-index-cache.h, dwarf-index-write.c, dwarf2-frame.c,
dwarf2expr.c, dwarf2loc.c, dwarf2read.c, event-loop.c,
event-top.c, exceptions.c, exec.c, extension.h, fbsd-nat.c,
features/aarch64-core.c, features/aarch64-fpu.c,
features/aarch64-pauth.c, features/aarch64-sve.c,
features/i386/32bit-avx.c, features/i386/32bit-avx512.c,
features/i386/32bit-core.c, features/i386/32bit-linux.c,
features/i386/32bit-mpx.c, features/i386/32bit-pkeys.c,
features/i386/32bit-segments.c, features/i386/32bit-sse.c,
features/i386/64bit-avx.c, features/i386/64bit-avx512.c,
features/i386/64bit-core.c, features/i386/64bit-linux.c,
features/i386/64bit-mpx.c, features/i386/64bit-pkeys.c,
features/i386/64bit-segments.c, features/i386/64bit-sse.c,
features/i386/x32-core.c, features/riscv/32bit-cpu.c,
features/riscv/32bit-csr.c, features/riscv/32bit-fpu.c,
features/riscv/64bit-cpu.c, features/riscv/64bit-csr.c,
features/riscv/64bit-fpu.c, features/tic6x-c6xp.c,
features/tic6x-core.c, features/tic6x-gp.c, filename-seen-cache.h,
findcmd.c, findvar.c, fork-child.c, gcore.c, gdb_bfd.c, gdb_bfd.h,
gdb_proc_service.h, gdb_regex.c, gdb_select.h, gdb_usleep.c,
gdbarch-selftests.c, gdbthread.h, gdbtypes.h, gnu-nat.c,
go32-nat.c, guile/guile.c, guile/scm-ports.c,
guile/scm-safe-call.c, guile/scm-type.c, i386-fbsd-nat.c,
i386-fbsd-tdep.c, i386-go32-tdep.c, i386-linux-nat.c,
i386-linux-tdep.c, i386-tdep.c, i387-tdep.c,
ia64-libunwind-tdep.c, ia64-linux-nat.c, inf-child.c,
inf-ptrace.c, infcall.c, infcall.h, infcmd.c, inferior-iter.h,
inferior.c, inferior.h, inflow.c, inflow.h, infrun.c, infrun.h,
inline-frame.c, language.h, linespec.c, linux-fork.c, linux-nat.c,
linux-tdep.c, linux-thread-db.c, location.c, machoread.c,
macrotab.h, main.c, maint.c, maint.h, memattr.c, memrange.h,
mi/mi-cmd-break.h, mi/mi-cmd-env.c, mi/mi-cmd-stack.c,
mi/mi-cmd-var.c, mi/mi-interp.c, mi/mi-main.c, mi/mi-parse.h,
minsyms.c, mips-linux-tdep.c, namespace.h,
nat/aarch64-linux-hw-point.c, nat/aarch64-linux-hw-point.h,
nat/aarch64-linux.c, nat/aarch64-sve-linux-ptrace.c,
nat/amd64-linux-siginfo.c, nat/fork-inferior.c,
nat/linux-btrace.c, nat/linux-btrace.h, nat/linux-namespaces.c,
nat/linux-nat.h, nat/linux-osdata.c, nat/linux-personality.c,
nat/linux-procfs.c, nat/linux-ptrace.c, nat/linux-ptrace.h,
nat/linux-waitpid.c, nat/mips-linux-watch.c,
nat/mips-linux-watch.h, nat/ppc-linux.c, nat/x86-dregs.c,
nat/x86-dregs.h, nat/x86-linux-dregs.c, nat/x86-linux.c,
nto-procfs.c, nto-tdep.c, objfile-flags.h, objfiles.c, objfiles.h,
obsd-nat.c, observable.h, osdata.c, p-valprint.c, parse.c,
parser-defs.h, ppc-linux-nat.c, printcmd.c, probe.c, proc-api.c,
procfs.c, producer.c, progspace.h, psymtab.h,
python/py-framefilter.c, python/py-inferior.c, python/py-ref.h,
python/py-type.c, python/python.c, record-btrace.c, record-full.c,
record.c, record.h, regcache-dump.c, regcache.c, regcache.h,
remote-fileio.c, remote-fileio.h, remote-sim.c, remote.c,
riscv-tdep.c, rs6000-aix-tdep.c, rust-exp.y, s12z-tdep.c,
selftest-arch.c, ser-base.c, ser-event.c, ser-pipe.c, ser-tcp.c,
ser-unix.c, skip.c, solib-aix.c, solib-target.c, solib.c,
source-cache.c, source.c, source.h, sparc-nat.c, spu-linux-nat.c,
stack.c, stap-probe.c, symfile-add-flags.h, symfile.c, symfile.h,
symtab.c, symtab.h, target-descriptions.c, target-descriptions.h,
target-memory.c, target.c, target.h, target/waitstatus.c,
target/waitstatus.h, thread-iter.h, thread.c, tilegx-tdep.c,
top.c, top.h, tracefile-tfile.c, tracefile.c, tracepoint.c,
tracepoint.h, tui/tui-io.c, ui-file.c, ui-out.h,
unittests/array-view-selftests.c,
unittests/child-path-selftests.c, unittests/cli-utils-selftests.c,
unittests/common-utils-selftests.c,
unittests/copy_bitwise-selftests.c, unittests/environ-selftests.c,
unittests/format_pieces-selftests.c,
unittests/function-view-selftests.c,
unittests/lookup_name_info-selftests.c,
unittests/memory-map-selftests.c, unittests/memrange-selftests.c,
unittests/mkdir-recursive-selftests.c,
unittests/observable-selftests.c,
unittests/offset-type-selftests.c, unittests/optional-selftests.c,
unittests/parse-connection-spec-selftests.c,
unittests/ptid-selftests.c, unittests/rsp-low-selftests.c,
unittests/scoped_fd-selftests.c,
unittests/scoped_mmap-selftests.c,
unittests/scoped_restore-selftests.c,
unittests/string_view-selftests.c, unittests/style-selftests.c,
unittests/tracepoint-selftests.c, unittests/unpack-selftests.c,
unittests/utils-selftests.c, unittests/xml-utils-selftests.c,
utils.c, utils.h, valarith.c, valops.c, valprint.c, value.c,
value.h, varobj.c, varobj.h, windows-nat.c, x86-linux-nat.c,
xml-support.c, xml-support.h, xml-tdesc.h, xstormy16-tdep.c,
xtensa-linux-nat.c, dwarf2read.h: Change common to gdbsupport.
gdb/gdbserver/ChangeLog
2019-07-09 Tom Tromey <tom@tromey.com>
* configure: Rebuild.
* configure.ac: Change common to gdbsupport.
* acinclude.m4: Change common to gdbsupport.
* Makefile.in (SFILES, OBS, GDBREPLAY_OBS, IPA_OBJS)
(version-generated.c, gdbsupport/%-ipa.o, gdbsupport/%.o): Change
common to gdbsupport.
* ax.c, event-loop.c, fork-child.c, gdb_proc_service.h,
gdbreplay.c, gdbthread.h, hostio-errno.c, hostio.c, i387-fp.c,
inferiors.c, inferiors.h, linux-aarch64-tdesc-selftest.c,
linux-amd64-ipa.c, linux-i386-ipa.c, linux-low.c,
linux-tic6x-low.c, linux-x86-low.c, linux-x86-tdesc-selftest.c,
linux-x86-tdesc.c, lynx-i386-low.c, lynx-low.c, mem-break.h,
nto-x86-low.c, regcache.c, regcache.h, remote-utils.c, server.c,
server.h, spu-low.c, symbol.c, target.h, tdesc.c, tdesc.h,
thread-db.c, tracepoint.c, win32-i386-low.c, win32-low.c: Change
common to gdbsupport.
2019-05-06 04:29:24 +02:00
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#include "gdbsupport/common-defs.h"
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#include "gdbsupport/common-regcache.h"
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2015-10-21 17:13:41 +02:00
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#include "arm.h"
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2019-07-19 16:01:11 +02:00
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#include "../features/arm/arm-core.c"
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#include "../features/arm/arm-vfpv2.c"
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#include "../features/arm/arm-vfpv3.c"
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#include "../features/arm/xscale-iwmmxt.c"
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#include "../features/arm/arm-m-profile.c"
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#include "../features/arm/arm-m-profile-with-fpa.c"
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2019-07-19 15:59:10 +02:00
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2015-12-18 17:33:58 +01:00
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/* See arm.h. */
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2015-10-21 17:13:41 +02:00
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int
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thumb_insn_size (unsigned short inst1)
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{
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if ((inst1 & 0xe000) == 0xe000 && (inst1 & 0x1800) != 0)
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return 4;
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else
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return 2;
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}
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2015-12-18 17:33:58 +01:00
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/* See arm.h. */
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int
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bitcount (unsigned long val)
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{
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int nbits;
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for (nbits = 0; val != 0; nbits++)
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val &= val - 1; /* Delete rightmost 1-bit in val. */
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return nbits;
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}
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/* See arm.h. */
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int
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condition_true (unsigned long cond, unsigned long status_reg)
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{
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if (cond == INST_AL || cond == INST_NV)
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return 1;
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switch (cond)
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{
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case INST_EQ:
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return ((status_reg & FLAG_Z) != 0);
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case INST_NE:
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return ((status_reg & FLAG_Z) == 0);
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case INST_CS:
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return ((status_reg & FLAG_C) != 0);
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case INST_CC:
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return ((status_reg & FLAG_C) == 0);
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case INST_MI:
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return ((status_reg & FLAG_N) != 0);
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case INST_PL:
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return ((status_reg & FLAG_N) == 0);
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case INST_VS:
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return ((status_reg & FLAG_V) != 0);
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case INST_VC:
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return ((status_reg & FLAG_V) == 0);
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case INST_HI:
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return ((status_reg & (FLAG_C | FLAG_Z)) == FLAG_C);
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case INST_LS:
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return ((status_reg & (FLAG_C | FLAG_Z)) != FLAG_C);
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case INST_GE:
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return (((status_reg & FLAG_N) == 0) == ((status_reg & FLAG_V) == 0));
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case INST_LT:
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return (((status_reg & FLAG_N) == 0) != ((status_reg & FLAG_V) == 0));
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case INST_GT:
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return (((status_reg & FLAG_Z) == 0)
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&& (((status_reg & FLAG_N) == 0)
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== ((status_reg & FLAG_V) == 0)));
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case INST_LE:
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return (((status_reg & FLAG_Z) != 0)
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|| (((status_reg & FLAG_N) == 0)
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!= ((status_reg & FLAG_V) == 0)));
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}
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return 1;
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}
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Support software single step on ARM in GDBServer
This patch teaches GDBServer how to software single step on ARM
linux by sharing code with GDB.
The arm_get_next_pcs function in GDB is now shared with GDBServer. So
that GDBServer can use the function to return the possible addresses of
the next PC.
A proper shared context was also needed so that we could share the code,
this context is described in the arm_get_next_pcs structure.
Testing :
No regressions, tested on ubuntu 14.04 ARMv7 and x86.
With gdbserver-{native,extended} / { -marm -mthumb }
gdb/ChangeLog:
* Makefile.in (ALL_TARGET_OBS): Append arm-get-next-pcs.o,
arm-linux.o.
(ALLDEPFILES): Append arm-get-next-pcs.c, arm-linux.c
(arm-linux.o): New rule.
(arm-get-next-pcs.o): New rule.
* arch/arm-get-next-pcs.c: New file.
* arch/arm-get-next-pcs.h: New file.
* arch/arm-linux.h: New file.
* arch/arm-linux.c: New file.
* arm.c: Include common-regcache.c.
(thumb_advance_itstate): Moved from arm-tdep.c.
(arm_instruction_changes_pc): Likewise.
(thumb_instruction_changes_pc): Likewise.
(thumb2_instruction_changes_pc): Likewise.
(shifted_reg_val): Likewise.
* arm.h (submask): Move macro from arm-tdep.h
(bit): Likewise.
(bits): Likewise.
(sbits): Likewise.
(BranchDest): Likewise.
(thumb_advance_itstate): Moved declaration from arm-tdep.h
(arm_instruction_changes_pc): Likewise.
(thumb_instruction_changes_pc): Likewise.
(thumb2_instruction_changes_pc): Likewise.
(shifted_reg_val): Likewise.
* arm-linux-tdep.c: Include arch/arm.h, arch/arm-get-next-pcs.h
arch/arm-linux.h.
(arm_linux_get_next_pcs_ops): New struct.
(ARM_SIGCONTEXT_R0, ARM_UCONTEXT_SIGCONTEXT,
ARM_OLD_RT_SIGFRAME_SIGINFO, ARM_OLD_RT_SIGFRAME_UCONTEXT,
ARM_NEW_RT_SIGFRAME_UCONTEXT, ARM_NEW_SIGFRAME_MAGIC): Move stack
layout defines to arch/arm-linux.h.
(arm_linux_sigreturn_next_pc_offset): Move to arch/arm-linux.c.
(arm_linux_software_single_step): Adjust for arm_get_next_pcs
implementation.
* arm-tdep.c: Include arch/arm-get-next-pcs.h.
(arm_get_next_pcs_ops): New struct.
(submask): Move macro to arm.h.
(bit): Likewise.
(bits): Likewise.
(sbits): Likewise.
(BranchDest): Likewise.
(thumb_instruction_changes_pc): Move to arm.c
(thumb2_instruction_changes_pc): Likewise.
(arm_instruction_changes_pc): Likewise.
(shifted_reg_val): Likewise.
(thumb_advance_itstate): Likewise.
(thumb_get_next_pc_raw): Move to arm-get-next-pcs.c.
(arm_get_next_pc_raw): Likewise.
(arm_get_next_pc): Likewise.
(thumb_deal_with_atomic_sequence_raw): Likewise.
(arm_deal_with_atomic_sequence_raw): Likewise.
(arm_deal_with_atomic_sequence): Likewise.
(arm_get_next_pcs_read_memory_unsigned_integer): New function.
(arm_get_next_pcs_addr_bits_remove): Likewise.
(arm_get_next_pcs_syscall_next_pc): Likewise.
(arm_get_next_pcs_is_thumb): Likewise.
(arm_software_single_step): Adjust for arm_get_next_pcs
implementation.
* arm-tdep.h: (arm_get_next_pc): Remove declaration.
(arm_get_next_pcs_read_memory_unsigned_integer):
New declaration.
(arm_get_next_pcs_addr_bits_remove): Likewise.
(arm_get_next_pcs_syscall_next_pc): Likewise.
(arm_get_next_pcs_is_thumb): Likewise.
(arm_deal_with_atomic_sequence: Remove declaration.
* common/gdb_vecs.h: Add CORE_ADDR vector definition.
* configure.tgt (aarch64*-*-linux): Add arm-get-next-pcs.o,
arm-linux.o.
(arm*-wince-pe): Add arm-get-next-pcs.o.
(arm*-*-linux*): Add arm-get-next-pcs.o, arm-linux.o,
arm-get-next-pcs.o
(arm*-*-netbsd*,arm*-*-knetbsd*-gnu): Add arm-get-next-pcs.o.
(arm*-*-openbsd*): Likewise.
(arm*-*-symbianelf*): Likewise.
(arm*-*-*): Likewise.
* symtab.h: Move CORE_ADDR vector definition to gdb_vecs.h.
gdb/gdbserver/ChangeLog:
* Makefile.in (SFILES): Append arch/arm-linux.c,
arch/arm-get-next-pcs.c.
(arm-linux.o): New rule.
(arm-get-next-pcs.o): New rule.
* configure.srv (arm*-*-linux*): Add arm-get-next-pcs.o,
arm-linux.o.
* linux-aarch32-low.c (arm_abi_breakpoint): Remove macro. Moved
to linux-aarch32-low.c.
(arm_eabi_breakpoint, arm_breakpoint): Likewise.
(arm_breakpoint_len, thumb_breakpoint): Likewise.
(thumb_breakpoint_len, thumb2_breakpoint): Likewise.
(thumb2_breakpoint_len): Likewise.
(arm_is_thumb_mode): Make non-static.
* linux-aarch32-low.h (arm_abi_breakpoint): New macro. Moved
from linux-aarch32-low.c.
(arm_eabi_breakpoint, arm_breakpoint): Likewise.
(arm_breakpoint_len, thumb_breakpoint): Likewise.
(thumb_breakpoint_len, thumb2_breakpoint): Likewise.
(thumb2_breakpoint_len): Likewise.
(arm_is_thumb_mode): New declaration.
* linux-arm-low.c: Include arch/arm-linux.h
aarch/arm-get-next-pcs.h, sys/syscall.h.
(get_next_pcs_ops): New struct.
(get_next_pcs_addr_bits_remove): New function.
(get_next_pcs_is_thumb): New function.
(get_next_pcs_read_memory_unsigned_integer): Likewise.
(arm_sigreturn_next_pc): Likewise.
(get_next_pcs_syscall_next_pc): Likewise.
(arm_gdbserver_get_next_pcs): Likewise.
(struct linux_target_ops) <arm_gdbserver_get_next_pcs>:
Initialize.
* linux-low.h: Move CORE_ADDR vector definition to gdb_vecs.h.
* server.h: Include gdb_vecs.h.
2015-12-18 17:33:59 +01:00
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/* See arm.h. */
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int
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thumb_advance_itstate (unsigned int itstate)
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{
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/* Preserve IT[7:5], the first three bits of the condition. Shift
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the upcoming condition flags left by one bit. */
|
|
|
|
itstate = (itstate & 0xe0) | ((itstate << 1) & 0x1f);
|
|
|
|
|
|
|
|
/* If we have finished the IT block, clear the state. */
|
|
|
|
if ((itstate & 0x0f) == 0)
|
|
|
|
itstate = 0;
|
|
|
|
|
|
|
|
return itstate;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* See arm.h. */
|
|
|
|
|
|
|
|
int
|
|
|
|
arm_instruction_changes_pc (uint32_t this_instr)
|
|
|
|
{
|
|
|
|
if (bits (this_instr, 28, 31) == INST_NV)
|
|
|
|
/* Unconditional instructions. */
|
|
|
|
switch (bits (this_instr, 24, 27))
|
|
|
|
{
|
|
|
|
case 0xa:
|
|
|
|
case 0xb:
|
|
|
|
/* Branch with Link and change to Thumb. */
|
|
|
|
return 1;
|
|
|
|
case 0xc:
|
|
|
|
case 0xd:
|
|
|
|
case 0xe:
|
|
|
|
/* Coprocessor register transfer. */
|
|
|
|
if (bits (this_instr, 12, 15) == 15)
|
|
|
|
error (_("Invalid update to pc in instruction"));
|
|
|
|
return 0;
|
|
|
|
default:
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
switch (bits (this_instr, 25, 27))
|
|
|
|
{
|
|
|
|
case 0x0:
|
|
|
|
if (bits (this_instr, 23, 24) == 2 && bit (this_instr, 20) == 0)
|
|
|
|
{
|
|
|
|
/* Multiplies and extra load/stores. */
|
|
|
|
if (bit (this_instr, 4) == 1 && bit (this_instr, 7) == 1)
|
|
|
|
/* Neither multiplies nor extension load/stores are allowed
|
|
|
|
to modify PC. */
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
/* Otherwise, miscellaneous instructions. */
|
|
|
|
|
|
|
|
/* BX <reg>, BXJ <reg>, BLX <reg> */
|
|
|
|
if (bits (this_instr, 4, 27) == 0x12fff1
|
|
|
|
|| bits (this_instr, 4, 27) == 0x12fff2
|
|
|
|
|| bits (this_instr, 4, 27) == 0x12fff3)
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
/* Other miscellaneous instructions are unpredictable if they
|
|
|
|
modify PC. */
|
|
|
|
return 0;
|
|
|
|
}
|
2016-09-27 19:18:04 +02:00
|
|
|
/* Data processing instruction. */
|
|
|
|
/* Fall through. */
|
Support software single step on ARM in GDBServer
This patch teaches GDBServer how to software single step on ARM
linux by sharing code with GDB.
The arm_get_next_pcs function in GDB is now shared with GDBServer. So
that GDBServer can use the function to return the possible addresses of
the next PC.
A proper shared context was also needed so that we could share the code,
this context is described in the arm_get_next_pcs structure.
Testing :
No regressions, tested on ubuntu 14.04 ARMv7 and x86.
With gdbserver-{native,extended} / { -marm -mthumb }
gdb/ChangeLog:
* Makefile.in (ALL_TARGET_OBS): Append arm-get-next-pcs.o,
arm-linux.o.
(ALLDEPFILES): Append arm-get-next-pcs.c, arm-linux.c
(arm-linux.o): New rule.
(arm-get-next-pcs.o): New rule.
* arch/arm-get-next-pcs.c: New file.
* arch/arm-get-next-pcs.h: New file.
* arch/arm-linux.h: New file.
* arch/arm-linux.c: New file.
* arm.c: Include common-regcache.c.
(thumb_advance_itstate): Moved from arm-tdep.c.
(arm_instruction_changes_pc): Likewise.
(thumb_instruction_changes_pc): Likewise.
(thumb2_instruction_changes_pc): Likewise.
(shifted_reg_val): Likewise.
* arm.h (submask): Move macro from arm-tdep.h
(bit): Likewise.
(bits): Likewise.
(sbits): Likewise.
(BranchDest): Likewise.
(thumb_advance_itstate): Moved declaration from arm-tdep.h
(arm_instruction_changes_pc): Likewise.
(thumb_instruction_changes_pc): Likewise.
(thumb2_instruction_changes_pc): Likewise.
(shifted_reg_val): Likewise.
* arm-linux-tdep.c: Include arch/arm.h, arch/arm-get-next-pcs.h
arch/arm-linux.h.
(arm_linux_get_next_pcs_ops): New struct.
(ARM_SIGCONTEXT_R0, ARM_UCONTEXT_SIGCONTEXT,
ARM_OLD_RT_SIGFRAME_SIGINFO, ARM_OLD_RT_SIGFRAME_UCONTEXT,
ARM_NEW_RT_SIGFRAME_UCONTEXT, ARM_NEW_SIGFRAME_MAGIC): Move stack
layout defines to arch/arm-linux.h.
(arm_linux_sigreturn_next_pc_offset): Move to arch/arm-linux.c.
(arm_linux_software_single_step): Adjust for arm_get_next_pcs
implementation.
* arm-tdep.c: Include arch/arm-get-next-pcs.h.
(arm_get_next_pcs_ops): New struct.
(submask): Move macro to arm.h.
(bit): Likewise.
(bits): Likewise.
(sbits): Likewise.
(BranchDest): Likewise.
(thumb_instruction_changes_pc): Move to arm.c
(thumb2_instruction_changes_pc): Likewise.
(arm_instruction_changes_pc): Likewise.
(shifted_reg_val): Likewise.
(thumb_advance_itstate): Likewise.
(thumb_get_next_pc_raw): Move to arm-get-next-pcs.c.
(arm_get_next_pc_raw): Likewise.
(arm_get_next_pc): Likewise.
(thumb_deal_with_atomic_sequence_raw): Likewise.
(arm_deal_with_atomic_sequence_raw): Likewise.
(arm_deal_with_atomic_sequence): Likewise.
(arm_get_next_pcs_read_memory_unsigned_integer): New function.
(arm_get_next_pcs_addr_bits_remove): Likewise.
(arm_get_next_pcs_syscall_next_pc): Likewise.
(arm_get_next_pcs_is_thumb): Likewise.
(arm_software_single_step): Adjust for arm_get_next_pcs
implementation.
* arm-tdep.h: (arm_get_next_pc): Remove declaration.
(arm_get_next_pcs_read_memory_unsigned_integer):
New declaration.
(arm_get_next_pcs_addr_bits_remove): Likewise.
(arm_get_next_pcs_syscall_next_pc): Likewise.
(arm_get_next_pcs_is_thumb): Likewise.
(arm_deal_with_atomic_sequence: Remove declaration.
* common/gdb_vecs.h: Add CORE_ADDR vector definition.
* configure.tgt (aarch64*-*-linux): Add arm-get-next-pcs.o,
arm-linux.o.
(arm*-wince-pe): Add arm-get-next-pcs.o.
(arm*-*-linux*): Add arm-get-next-pcs.o, arm-linux.o,
arm-get-next-pcs.o
(arm*-*-netbsd*,arm*-*-knetbsd*-gnu): Add arm-get-next-pcs.o.
(arm*-*-openbsd*): Likewise.
(arm*-*-symbianelf*): Likewise.
(arm*-*-*): Likewise.
* symtab.h: Move CORE_ADDR vector definition to gdb_vecs.h.
gdb/gdbserver/ChangeLog:
* Makefile.in (SFILES): Append arch/arm-linux.c,
arch/arm-get-next-pcs.c.
(arm-linux.o): New rule.
(arm-get-next-pcs.o): New rule.
* configure.srv (arm*-*-linux*): Add arm-get-next-pcs.o,
arm-linux.o.
* linux-aarch32-low.c (arm_abi_breakpoint): Remove macro. Moved
to linux-aarch32-low.c.
(arm_eabi_breakpoint, arm_breakpoint): Likewise.
(arm_breakpoint_len, thumb_breakpoint): Likewise.
(thumb_breakpoint_len, thumb2_breakpoint): Likewise.
(thumb2_breakpoint_len): Likewise.
(arm_is_thumb_mode): Make non-static.
* linux-aarch32-low.h (arm_abi_breakpoint): New macro. Moved
from linux-aarch32-low.c.
(arm_eabi_breakpoint, arm_breakpoint): Likewise.
(arm_breakpoint_len, thumb_breakpoint): Likewise.
(thumb_breakpoint_len, thumb2_breakpoint): Likewise.
(thumb2_breakpoint_len): Likewise.
(arm_is_thumb_mode): New declaration.
* linux-arm-low.c: Include arch/arm-linux.h
aarch/arm-get-next-pcs.h, sys/syscall.h.
(get_next_pcs_ops): New struct.
(get_next_pcs_addr_bits_remove): New function.
(get_next_pcs_is_thumb): New function.
(get_next_pcs_read_memory_unsigned_integer): Likewise.
(arm_sigreturn_next_pc): Likewise.
(get_next_pcs_syscall_next_pc): Likewise.
(arm_gdbserver_get_next_pcs): Likewise.
(struct linux_target_ops) <arm_gdbserver_get_next_pcs>:
Initialize.
* linux-low.h: Move CORE_ADDR vector definition to gdb_vecs.h.
* server.h: Include gdb_vecs.h.
2015-12-18 17:33:59 +01:00
|
|
|
|
|
|
|
case 0x1:
|
|
|
|
if (bits (this_instr, 12, 15) == 15)
|
|
|
|
return 1;
|
|
|
|
else
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
case 0x2:
|
|
|
|
case 0x3:
|
|
|
|
/* Media instructions and architecturally undefined instructions. */
|
|
|
|
if (bits (this_instr, 25, 27) == 3 && bit (this_instr, 4) == 1)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
/* Stores. */
|
|
|
|
if (bit (this_instr, 20) == 0)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
/* Loads. */
|
|
|
|
if (bits (this_instr, 12, 15) == ARM_PC_REGNUM)
|
|
|
|
return 1;
|
|
|
|
else
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
case 0x4:
|
|
|
|
/* Load/store multiple. */
|
|
|
|
if (bit (this_instr, 20) == 1 && bit (this_instr, 15) == 1)
|
|
|
|
return 1;
|
|
|
|
else
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
case 0x5:
|
|
|
|
/* Branch and branch with link. */
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
case 0x6:
|
|
|
|
case 0x7:
|
|
|
|
/* Coprocessor transfers or SWIs can not affect PC. */
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
default:
|
|
|
|
internal_error (__FILE__, __LINE__, _("bad value in switch"));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* See arm.h. */
|
|
|
|
|
|
|
|
int
|
|
|
|
thumb_instruction_changes_pc (unsigned short inst)
|
|
|
|
{
|
|
|
|
if ((inst & 0xff00) == 0xbd00) /* pop {rlist, pc} */
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
if ((inst & 0xf000) == 0xd000) /* conditional branch */
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
if ((inst & 0xf800) == 0xe000) /* unconditional branch */
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
if ((inst & 0xff00) == 0x4700) /* bx REG, blx REG */
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
if ((inst & 0xff87) == 0x4687) /* mov pc, REG */
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
if ((inst & 0xf500) == 0xb100) /* CBNZ or CBZ. */
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/* See arm.h. */
|
|
|
|
|
|
|
|
int
|
|
|
|
thumb2_instruction_changes_pc (unsigned short inst1, unsigned short inst2)
|
|
|
|
{
|
|
|
|
if ((inst1 & 0xf800) == 0xf000 && (inst2 & 0x8000) == 0x8000)
|
|
|
|
{
|
|
|
|
/* Branches and miscellaneous control instructions. */
|
|
|
|
|
|
|
|
if ((inst2 & 0x1000) != 0 || (inst2 & 0xd001) == 0xc000)
|
|
|
|
{
|
|
|
|
/* B, BL, BLX. */
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
else if (inst1 == 0xf3de && (inst2 & 0xff00) == 0x3f00)
|
|
|
|
{
|
|
|
|
/* SUBS PC, LR, #imm8. */
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
else if ((inst2 & 0xd000) == 0x8000 && (inst1 & 0x0380) != 0x0380)
|
|
|
|
{
|
|
|
|
/* Conditional branch. */
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((inst1 & 0xfe50) == 0xe810)
|
|
|
|
{
|
|
|
|
/* Load multiple or RFE. */
|
|
|
|
|
|
|
|
if (bit (inst1, 7) && !bit (inst1, 8))
|
|
|
|
{
|
|
|
|
/* LDMIA or POP */
|
|
|
|
if (bit (inst2, 15))
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
else if (!bit (inst1, 7) && bit (inst1, 8))
|
|
|
|
{
|
|
|
|
/* LDMDB */
|
|
|
|
if (bit (inst2, 15))
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
else if (bit (inst1, 7) && bit (inst1, 8))
|
|
|
|
{
|
|
|
|
/* RFEIA */
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
else if (!bit (inst1, 7) && !bit (inst1, 8))
|
|
|
|
{
|
|
|
|
/* RFEDB */
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((inst1 & 0xffef) == 0xea4f && (inst2 & 0xfff0) == 0x0f00)
|
|
|
|
{
|
|
|
|
/* MOV PC or MOVS PC. */
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((inst1 & 0xff70) == 0xf850 && (inst2 & 0xf000) == 0xf000)
|
|
|
|
{
|
|
|
|
/* LDR PC. */
|
|
|
|
if (bits (inst1, 0, 3) == 15)
|
|
|
|
return 1;
|
|
|
|
if (bit (inst1, 7))
|
|
|
|
return 1;
|
|
|
|
if (bit (inst2, 11))
|
|
|
|
return 1;
|
|
|
|
if ((inst2 & 0x0fc0) == 0x0000)
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((inst1 & 0xfff0) == 0xe8d0 && (inst2 & 0xfff0) == 0xf000)
|
|
|
|
{
|
|
|
|
/* TBB. */
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((inst1 & 0xfff0) == 0xe8d0 && (inst2 & 0xfff0) == 0xf010)
|
|
|
|
{
|
|
|
|
/* TBH. */
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* See arm.h. */
|
|
|
|
|
|
|
|
unsigned long
|
|
|
|
shifted_reg_val (struct regcache *regcache, unsigned long inst,
|
|
|
|
int carry, unsigned long pc_val, unsigned long status_reg)
|
|
|
|
{
|
|
|
|
unsigned long res, shift;
|
|
|
|
int rm = bits (inst, 0, 3);
|
|
|
|
unsigned long shifttype = bits (inst, 5, 6);
|
|
|
|
|
|
|
|
if (bit (inst, 4))
|
|
|
|
{
|
|
|
|
int rs = bits (inst, 8, 11);
|
|
|
|
shift = (rs == 15
|
|
|
|
? pc_val + 8
|
|
|
|
: regcache_raw_get_unsigned (regcache, rs)) & 0xFF;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
shift = bits (inst, 7, 11);
|
|
|
|
|
|
|
|
res = (rm == ARM_PC_REGNUM
|
|
|
|
? (pc_val + (bit (inst, 4) ? 12 : 8))
|
|
|
|
: regcache_raw_get_unsigned (regcache, rm));
|
|
|
|
|
|
|
|
switch (shifttype)
|
|
|
|
{
|
|
|
|
case 0: /* LSL */
|
|
|
|
res = shift >= 32 ? 0 : res << shift;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case 1: /* LSR */
|
|
|
|
res = shift >= 32 ? 0 : res >> shift;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case 2: /* ASR */
|
|
|
|
if (shift >= 32)
|
|
|
|
shift = 31;
|
|
|
|
res = ((res & 0x80000000L)
|
|
|
|
? ~((~res) >> shift) : res >> shift);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case 3: /* ROR/RRX */
|
|
|
|
shift &= 31;
|
|
|
|
if (shift == 0)
|
|
|
|
res = (res >> 1) | (carry ? 0x80000000L : 0);
|
|
|
|
else
|
|
|
|
res = (res >> shift) | (res << (32 - shift));
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return res & 0xffffffff;
|
|
|
|
}
|
2019-07-19 15:59:10 +02:00
|
|
|
|
|
|
|
/* See arch/arm.h. */
|
|
|
|
|
|
|
|
target_desc *
|
|
|
|
arm_create_target_description (arm_fp_type fp_type)
|
|
|
|
{
|
2019-07-19 16:01:11 +02:00
|
|
|
target_desc *tdesc = allocate_target_description ();
|
|
|
|
|
|
|
|
#ifndef IN_PROCESS_AGENT
|
|
|
|
if (fp_type == ARM_FP_TYPE_IWMMXT)
|
|
|
|
set_tdesc_architecture (tdesc, "iwmmxt");
|
|
|
|
else
|
|
|
|
set_tdesc_architecture (tdesc, "arm");
|
|
|
|
#endif
|
|
|
|
|
|
|
|
long regnum = 0;
|
|
|
|
|
|
|
|
regnum = create_feature_arm_arm_core (tdesc, regnum);
|
|
|
|
|
2019-07-19 15:59:10 +02:00
|
|
|
switch (fp_type)
|
|
|
|
{
|
|
|
|
case ARM_FP_TYPE_NONE:
|
2019-07-19 16:01:11 +02:00
|
|
|
break;
|
|
|
|
|
2019-07-19 15:59:10 +02:00
|
|
|
case ARM_FP_TYPE_VFPV2:
|
2019-07-19 16:01:11 +02:00
|
|
|
regnum = create_feature_arm_arm_vfpv2 (tdesc, regnum);
|
|
|
|
break;
|
2019-07-19 15:59:10 +02:00
|
|
|
|
|
|
|
case ARM_FP_TYPE_VFPV3:
|
2019-07-19 16:01:11 +02:00
|
|
|
regnum = create_feature_arm_arm_vfpv3 (tdesc, regnum);
|
|
|
|
break;
|
2019-07-19 15:59:10 +02:00
|
|
|
|
|
|
|
case ARM_FP_TYPE_IWMMXT:
|
2019-07-19 16:01:11 +02:00
|
|
|
regnum = create_feature_arm_xscale_iwmmxt (tdesc, regnum);
|
|
|
|
break;
|
|
|
|
|
2019-07-19 15:59:10 +02:00
|
|
|
default:
|
|
|
|
error (_("Invalid Arm FP type: %d"), fp_type);
|
|
|
|
}
|
2019-07-19 16:01:11 +02:00
|
|
|
|
|
|
|
return tdesc;
|
2019-07-19 15:59:10 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/* See arch/arm.h. */
|
|
|
|
|
|
|
|
target_desc *
|
|
|
|
arm_create_mprofile_target_description (arm_m_profile_type m_type)
|
|
|
|
{
|
2019-07-19 16:01:11 +02:00
|
|
|
target_desc *tdesc = allocate_target_description ();
|
|
|
|
|
|
|
|
#ifndef IN_PROCESS_AGENT
|
|
|
|
set_tdesc_architecture (tdesc, "arm");
|
|
|
|
#endif
|
|
|
|
|
|
|
|
long regnum = 0;
|
|
|
|
|
2019-07-19 15:59:10 +02:00
|
|
|
switch (m_type)
|
|
|
|
{
|
|
|
|
case ARM_M_TYPE_M_PROFILE:
|
2019-07-19 16:01:11 +02:00
|
|
|
regnum = create_feature_arm_arm_m_profile (tdesc, regnum);
|
|
|
|
break;
|
2019-07-19 15:59:10 +02:00
|
|
|
|
|
|
|
case ARM_M_TYPE_VFP_D16:
|
2019-07-19 16:01:11 +02:00
|
|
|
regnum = create_feature_arm_arm_m_profile (tdesc, regnum);
|
|
|
|
regnum = create_feature_arm_arm_vfpv2 (tdesc, regnum);
|
|
|
|
break;
|
2019-07-19 15:59:10 +02:00
|
|
|
|
|
|
|
case ARM_M_TYPE_WITH_FPA:
|
2019-07-19 16:01:11 +02:00
|
|
|
regnum = create_feature_arm_arm_m_profile_with_fpa (tdesc, regnum);
|
|
|
|
break;
|
|
|
|
|
2019-07-19 15:59:10 +02:00
|
|
|
default:
|
|
|
|
error (_("Invalid Arm M type: %d"), m_type);
|
|
|
|
}
|
|
|
|
|
2019-07-19 16:01:11 +02:00
|
|
|
return tdesc;
|
|
|
|
}
|