mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-09 04:21:49 +08:00
197e01b6dc
* arm-tdep.c: * ia64-tdep.c: * i386-tdep.c: * hpread.c: * hppa-tdep.c: * hppa-hpux-tdep.c: * gnu-nat.c: * gdbtypes.c: * gdbarch.h: * gdbarch.c: * eval.c: * dwarf2read.c: * dbxread.c: * copying: * symfile.c: * stabsread.c: * sh64-tdep.c: * sh-tdep.c: * s390-tdep.c: * rs6000-tdep.c: * remote.c: * remote-mips.c: * mips-tdep.c: * mdebugread.c: * linux-nat.c: * infrun.c: * xcoffread.c: * win32-nat.c: * valops.c: * utils.c: * tracepoint.c: * target.c: * symtab.c: * c-exp.y: * ada-valprint.c: * ada-typeprint.c: * ada-lex.l: * ada-lang.h: * ada-lang.c: * ada-exp.y: * alphafbsd-tdep.c: * alphabsd-tdep.h: * alphabsd-tdep.c: * alphabsd-nat.c: * alpha-tdep.h: * alpha-tdep.c: * alpha-osf1-tdep.c: * alpha-nat.c: * alpha-mdebug-tdep.c: * alpha-linux-tdep.c: * alpha-linux-nat.c: * aix-thread.c: * abug-rom.c: * arch-utils.c: * annotate.h: * annotate.c: * amd64obsd-tdep.c: * amd64obsd-nat.c: * amd64nbsd-tdep.c: * amd64nbsd-nat.c: * amd64fbsd-tdep.c: * amd64fbsd-nat.c: * amd64bsd-nat.c: * amd64-tdep.h: * amd64-tdep.c: * amd64-sol2-tdep.c: * amd64-nat.h: * amd64-nat.c: * amd64-linux-tdep.c: * amd64-linux-nat.c: * alphanbsd-tdep.c: * block.h: * block.c: * bfd-target.h: * bfd-target.c: * bcache.h: * bcache.c: * ax.h: * ax-general.c: * ax-gdb.h: * ax-gdb.c: * avr-tdep.c: * auxv.h: * auxv.c: * armnbsd-tdep.c: * armnbsd-nat.c: * arm-tdep.h: * arm-linux-nat.c: * arch-utils.h: * charset.c: * call-cmds.h: * c-valprint.c: * c-typeprint.c: * c-lang.h: * c-lang.c: * buildsym.h: * buildsym.c: * bsd-uthread.h: * bsd-uthread.c: * bsd-kvm.h: * bsd-kvm.c: * breakpoint.h: * core-regset.c: * core-aout.c: * completer.h: * completer.c: * complaints.h: * complaints.c: * command.h: * coffread.c: * coff-solib.h: * coff-solib.c: * coff-pe-read.h: * coff-pe-read.c: * cli-out.h: * cli-out.c: * charset.h: * dink32-rom.c: * dictionary.h: * dictionary.c: * demangle.c: * defs.h: * dcache.h: * dcache.c: * d10v-tdep.c: * cpu32bug-rom.c: * cp-valprint.c: * cp-support.h: * cp-support.c: * cp-namespace.c: * cp-abi.h: * cp-abi.c: * corelow.c: * corefile.c: * environ.c: * elfread.c: * dwarfread.c: * dwarf2loc.c: * dwarf2expr.h: * dwarf2expr.c: * dwarf2-frame.h: * dwarf2-frame.c: * dve3900-rom.c: * dummy-frame.h: * dummy-frame.c: * dsrec.c: * doublest.h: * doublest.c: * disasm.h: * disasm.c: * fork-child.c: * findvar.c: * fbsd-nat.h: * fbsd-nat.c: * f-valprint.c: * f-typeprint.c: * f-lang.h: * f-lang.c: * expression.h: * expprint.c: * exec.h: * exec.c: * exceptions.h: * exceptions.c: * event-top.h: * event-top.c: * event-loop.h: * event-loop.c: * gdb.c: * gdb-stabs.h: * gdb-events.h: * gdb-events.c: * gcore.c: * frv-tdep.h: * frv-tdep.c: * frv-linux-tdep.c: * frame.h: * frame.c: * frame-unwind.h: * frame-unwind.c: * frame-base.h: * frame-base.c: * gdb_vfork.h: * gdb_thread_db.h: * gdb_string.h: * gdb_stat.h: * gdb_regex.h: * gdb_ptrace.h: * gdb_proc_service.h: * gdb_obstack.h: * gdb_locale.h: * gdb_dirent.h: * gdb_curses.h: * gdb_assert.h: * gdbarch.sh: * gdb.h: * hpux-thread.c: * hppabsd-nat.c: * hppa-tdep.h: * hpacc-abi.c: * h8300-tdep.c: * gregset.h: * go32-nat.c: * gnu-v3-abi.c: * gnu-v2-abi.h: * gnu-v2-abi.c: * gnu-nat.h: * glibc-tdep.c: * gdbtypes.h: * gdbcore.h: * gdbcmd.h: * i386nbsd-tdep.c: * i386nbsd-nat.c: * i386gnu-tdep.c: * i386gnu-nat.c: * i386fbsd-tdep.c: * i386fbsd-nat.c: * i386bsd-tdep.c: * i386bsd-nat.h: * i386bsd-nat.c: * i386-tdep.h: * i386-sol2-nat.c: * i386-nto-tdep.c: * i386-nat.c: * i386-linux-tdep.h: * i386-linux-tdep.c: * i386-linux-nat.c: * i386-cygwin-tdep.c: * inf-ttrace.c: * inf-ptrace.h: * inf-ptrace.c: * inf-loop.h: * inf-loop.c: * inf-child.h: * inf-child.c: * ia64-tdep.h: * ia64-linux-nat.c: * i387-tdep.h: * i387-tdep.c: * i386v4-nat.c: * i386v-nat.c: * i386obsd-tdep.c: * i386obsd-nat.c: * kod.c: * jv-valprint.c: * jv-typeprint.c: * jv-lang.h: * jv-lang.c: * irix5-nat.c: * iq2000-tdep.c: * interps.h: * interps.c: * inftarg.c: * inflow.h: * inflow.c: * inferior.h: * infcmd.c: * infcall.h: * infcall.c: * inf-ttrace.h: * m32r-tdep.h: * m32r-tdep.c: * m32r-rom.c: * m32r-linux-tdep.c: * m32r-linux-nat.c: * m2-valprint.c: * m2-typeprint.c: * m2-lang.h: * m2-lang.c: * lynx-nat.c: * linux-thread-db.c: * linux-nat.h: * linespec.c: * libunwind-frame.h: * libunwind-frame.c: * language.h: * language.c: * macroexp.c: * macrocmd.c: * m88kbsd-nat.c: * m88k-tdep.h: * m88k-tdep.c: * m68klinux-tdep.c: * m68klinux-nat.c: * m68kbsd-tdep.c: * m68kbsd-nat.c: * m68k-tdep.h: * m68k-tdep.c: * mips-linux-nat.c: * mips-irix-tdep.c: * minsyms.c: * memattr.h: * memattr.c: * mem-break.c: * mdebugread.h: * main.h: * main.c: * macrotab.h: * macrotab.c: * macroscope.h: * macroscope.c: * macroexp.h: * nbsd-tdep.c: * mt-tdep.c: * monitor.h: * monitor.c: * mn10300-tdep.h: * mn10300-tdep.c: * mn10300-linux-tdep.c: * mipsv4-nat.c: * mipsread.c: * mipsnbsd-tdep.h: * mipsnbsd-tdep.c: * mipsnbsd-nat.c: * mips64obsd-tdep.c: * mips64obsd-nat.c: * mips-tdep.h: * mips-mdebug-tdep.c: * mips-linux-tdep.c: * osabi.h: * osabi.c: * ocd.h: * ocd.c: * observer.c: * objfiles.h: * objfiles.c: * objc-lang.h: * objc-lang.c: * objc-exp.y: * nto-tdep.h: * nto-tdep.c: * nto-procfs.c: * nlmread.c: * nbsd-tdep.h: * ppcobsd-tdep.c: * ppcobsd-nat.c: * ppcnbsd-tdep.h: * ppcnbsd-tdep.c: * ppcnbsd-nat.c: * ppcbug-rom.c: * ppc-tdep.h: * ppc-sysv-tdep.c: * ppc-linux-tdep.c: * ppc-linux-nat.c: * ppc-bdm.c: * parser-defs.h: * parse.c: * p-valprint.c: * p-typeprint.c: * p-lang.h: * p-lang.c: * remote-fileio.h: * remote-fileio.c: * remote-est.c: * remote-e7000.c: * regset.h: * regset.c: * reggroups.h: * reggroups.c: * regcache.h: * regcache.c: * proc-why.c: * proc-service.c: * proc-events.c: * printcmd.c: * ppcobsd-tdep.h: * sentinel-frame.h: * sentinel-frame.c: * scm-valprint.c: * scm-tags.h: * scm-lang.h: * scm-lang.c: * scm-exp.c: * s390-tdep.h: * rom68k-rom.c: * remote.h: * remote-utils.c: * remote-st.c: * remote-sim.c: * remote-sds.c: * remote-rdp.c: * remote-rdi.c: * remote-hms.c: * sim-regno.h: * shnbsd-tdep.h: * shnbsd-tdep.c: * shnbsd-nat.c: * sh-tdep.h: * serial.h: * serial.c: * ser-unix.h: * ser-unix.c: * ser-tcp.c: * ser-pipe.c: * ser-go32.c: * ser-e7kpc.c: * ser-base.h: * ser-base.c: * solib.c: * solib-svr4.h: * solib-svr4.c: * solib-sunos.c: * solib-som.h: * solib-som.c: * solib-pa64.h: * solib-pa64.c: * solib-osf.c: * solib-null.c: * solib-legacy.c: * solib-irix.c: * solib-frv.c: * solib-aix5.c: * sol-thread.c: * sparc64-linux-tdep.c: * sparc64-linux-nat.c: * sparc-tdep.h: * sparc-tdep.c: * sparc-sol2-tdep.c: * sparc-sol2-nat.c: * sparc-nat.h: * sparc-nat.c: * sparc-linux-tdep.c: * sparc-linux-nat.c: * source.h: * source.c: * somread.c: * solist.h: * solib.h: * std-regs.c: * stack.h: * stack.c: * stabsread.h: * sparcobsd-tdep.c: * sparcnbsd-tdep.c: * sparcnbsd-nat.c: * sparc64obsd-tdep.c: * sparc64nbsd-tdep.c: * sparc64nbsd-nat.c: * sparc64fbsd-tdep.c: * sparc64fbsd-nat.c: * sparc64-tdep.h: * sparc64-tdep.c: * sparc64-sol2-tdep.c: * sparc64-nat.c: * ui-file.c: * typeprint.h: * typeprint.c: * tramp-frame.h: * tramp-frame.c: * trad-frame.h: * trad-frame.c: * tracepoint.h: * top.c: * tobs.inc: * thread.c: * terminal.h: * target.h: * symfile.h: * stop-gdb.c: * vaxbsd-nat.c: * vax-tdep.h: * vax-tdep.c: * vax-nat.c: * varobj.h: * varobj.c: * value.h: * value.c: * valprint.h: * valprint.c: * v850-tdep.c: * uw-thread.c: * user-regs.c: * ui-out.h: * ui-out.c: * ui-file.h: * xcoffsolib.h: * xcoffsolib.c: * wrapper.c: * wince.c: * wince-stub.h: * wince-stub.c: * vaxobsd-tdep.c: * vaxnbsd-tdep.c: * gdb_gcore.sh: * copying.c: * configure.ac: * aclocal.m4: * acinclude.m4: * reply_mig_hack.awk: * observer.sh: * gdb_mbuild.sh: * arm-linux-tdep.c: * blockframe.c: * dbug-rom.c: * environ.h: * dwarf2loc.h: * gdb-events.sh: * glibc-tdep.h: * gdb_wait.h: * gdbthread.h: * i386-sol2-tdep.c: * hppabsd-tdep.c: * hppa-linux-nat.c: * hppa-hpux-nat.c: * ia64-linux-tdep.c: * infptrace.c: * linespec.h: * maint.c: * mips-mdebug-tdep.h: * remote-m32r-sdi.c: * s390-nat.c: * rs6000-nat.c: * remote-utils.h: * sh3-rom.c: * sh-linux-tdep.c: * top.h: * symtab.h: * symmisc.c: * symfile-mem.c: * srec.h: * user-regs.h: * version.h: * valarith.c: * xstormy16-tdep.c: * wrapper.h: * Makefile.in: * f-exp.y: * cris-tdep.c: * cp-name-parser.y: * procfs.c: * proc-utils.h: * proc-flags.c: * proc-api.c: * p-exp.y: * m68hc11-tdep.c: * m2-exp.y: * kod.h: * kod-cisco.c: * jv-exp.y: * hppa-linux-tdep.c: Add (c) after Copyright. Update the FSF address.
640 lines
16 KiB
C
640 lines
16 KiB
C
/* Motorola m68k native support for GNU/Linux.
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Copyright (C) 1996, 1998, 2000, 2001, 2002, 2003, 2004, 2005
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Free Software Foundation, Inc.
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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 2 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, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#include "defs.h"
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#include "frame.h"
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#include "inferior.h"
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#include "language.h"
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#include "gdbcore.h"
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#include "gdb_string.h"
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#include "regcache.h"
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#include "target.h"
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#include "linux-nat.h"
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#include "m68k-tdep.h"
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#include <sys/param.h>
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#include <sys/dir.h>
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#include <signal.h>
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#include <sys/ptrace.h>
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#include <sys/user.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <sys/procfs.h>
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#ifdef HAVE_SYS_REG_H
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#include <sys/reg.h>
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#endif
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#include <sys/file.h>
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#include "gdb_stat.h"
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#include "floatformat.h"
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#include "target.h"
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/* This table must line up with REGISTER_NAME in "m68k-tdep.c". */
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static const int regmap[] =
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{
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PT_D0, PT_D1, PT_D2, PT_D3, PT_D4, PT_D5, PT_D6, PT_D7,
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PT_A0, PT_A1, PT_A2, PT_A3, PT_A4, PT_A5, PT_A6, PT_USP,
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PT_SR, PT_PC,
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/* PT_FP0, ..., PT_FP7 */
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21, 24, 27, 30, 33, 36, 39, 42,
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/* PT_FPCR, PT_FPSR, PT_FPIAR */
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45, 46, 47
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};
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/* Which ptrace request retrieves which registers?
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These apply to the corresponding SET requests as well. */
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#define NUM_GREGS (18)
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#define MAX_NUM_REGS (NUM_GREGS + 11)
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int
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getregs_supplies (int regno)
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{
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return 0 <= regno && regno < NUM_GREGS;
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}
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int
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getfpregs_supplies (int regno)
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{
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return FP0_REGNUM <= regno && regno <= M68K_FPI_REGNUM;
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}
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/* Does the current host support the GETREGS request? */
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int have_ptrace_getregs =
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#ifdef HAVE_PTRACE_GETREGS
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1
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#else
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0
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#endif
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;
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/* BLOCKEND is the value of u.u_ar0, and points to the place where GS
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is stored. */
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int
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m68k_linux_register_u_addr (int blockend, int regnum)
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{
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return (blockend + 4 * regmap[regnum]);
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}
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/* Fetching registers directly from the U area, one at a time. */
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/* FIXME: This duplicates code from `inptrace.c'. The problem is that we
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define FETCH_INFERIOR_REGISTERS since we want to use our own versions
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of {fetch,store}_inferior_registers that use the GETREGS request. This
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means that the code in `infptrace.c' is #ifdef'd out. But we need to
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fall back on that code when GDB is running on top of a kernel that
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doesn't support the GETREGS request. */
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#ifndef PT_READ_U
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#define PT_READ_U PTRACE_PEEKUSR
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#endif
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#ifndef PT_WRITE_U
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#define PT_WRITE_U PTRACE_POKEUSR
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#endif
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/* Default the type of the ptrace transfer to int. */
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#ifndef PTRACE_XFER_TYPE
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#define PTRACE_XFER_TYPE int
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#endif
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/* Fetch one register. */
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static void
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fetch_register (int regno)
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{
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/* This isn't really an address. But ptrace thinks of it as one. */
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CORE_ADDR regaddr;
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char mess[128]; /* For messages */
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int i;
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unsigned int offset; /* Offset of registers within the u area. */
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char buf[MAX_REGISTER_SIZE];
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int tid;
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if (CANNOT_FETCH_REGISTER (regno))
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{
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memset (buf, '\0', register_size (current_gdbarch, regno)); /* Supply zeroes */
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regcache_raw_supply (current_regcache, regno, buf);
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return;
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}
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/* Overload thread id onto process id */
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tid = TIDGET (inferior_ptid);
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if (tid == 0)
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tid = PIDGET (inferior_ptid); /* no thread id, just use process id */
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offset = U_REGS_OFFSET;
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regaddr = register_addr (regno, offset);
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for (i = 0; i < register_size (current_gdbarch, regno);
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i += sizeof (PTRACE_XFER_TYPE))
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{
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errno = 0;
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*(PTRACE_XFER_TYPE *) &buf[i] = ptrace (PT_READ_U, tid,
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(PTRACE_ARG3_TYPE) regaddr, 0);
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regaddr += sizeof (PTRACE_XFER_TYPE);
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if (errno != 0)
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{
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sprintf (mess, "reading register %s (#%d)",
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REGISTER_NAME (regno), regno);
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perror_with_name (mess);
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}
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}
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regcache_raw_supply (current_regcache, regno, buf);
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}
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/* Fetch register values from the inferior.
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If REGNO is negative, do this for all registers.
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Otherwise, REGNO specifies which register (so we can save time). */
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static void
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old_fetch_inferior_registers (int regno)
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{
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if (regno >= 0)
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{
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fetch_register (regno);
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}
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else
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{
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for (regno = 0; regno < NUM_REGS; regno++)
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{
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fetch_register (regno);
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}
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}
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}
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/* Store one register. */
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static void
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store_register (int regno)
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{
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/* This isn't really an address. But ptrace thinks of it as one. */
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CORE_ADDR regaddr;
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char mess[128]; /* For messages */
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int i;
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unsigned int offset; /* Offset of registers within the u area. */
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int tid;
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char buf[MAX_REGISTER_SIZE];
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if (CANNOT_STORE_REGISTER (regno))
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{
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return;
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}
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/* Overload thread id onto process id */
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tid = TIDGET (inferior_ptid);
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if (tid == 0)
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tid = PIDGET (inferior_ptid); /* no thread id, just use process id */
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offset = U_REGS_OFFSET;
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regaddr = register_addr (regno, offset);
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/* Put the contents of regno into a local buffer */
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regcache_raw_collect (current_regcache, regno, buf);
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/* Store the local buffer into the inferior a chunk at the time. */
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for (i = 0; i < register_size (current_gdbarch, regno);
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i += sizeof (PTRACE_XFER_TYPE))
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{
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errno = 0;
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ptrace (PT_WRITE_U, tid, (PTRACE_ARG3_TYPE) regaddr,
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*(PTRACE_XFER_TYPE *) (buf + i));
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regaddr += sizeof (PTRACE_XFER_TYPE);
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if (errno != 0)
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{
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sprintf (mess, "writing register %s (#%d)",
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REGISTER_NAME (regno), regno);
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perror_with_name (mess);
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}
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}
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}
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/* Store our register values back into the inferior.
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If REGNO is negative, do this for all registers.
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Otherwise, REGNO specifies which register (so we can save time). */
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static void
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old_store_inferior_registers (int regno)
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{
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if (regno >= 0)
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{
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store_register (regno);
|
||
}
|
||
else
|
||
{
|
||
for (regno = 0; regno < NUM_REGS; regno++)
|
||
{
|
||
store_register (regno);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Given a pointer to a general register set in /proc format
|
||
(elf_gregset_t *), unpack the register contents and supply
|
||
them as gdb's idea of the current register values. */
|
||
|
||
|
||
/* Note both m68k-tdep.c and m68klinux-nat.c contain definitions
|
||
for supply_gregset and supply_fpregset. The definitions
|
||
in m68k-tdep.c are valid if USE_PROC_FS is defined. Otherwise,
|
||
the definitions in m68klinux-nat.c will be used. This is a
|
||
bit of a hack. The supply_* routines do not belong in
|
||
*_tdep.c files. But, there are several lynx ports that currently
|
||
depend on these definitions. */
|
||
|
||
#ifndef USE_PROC_FS
|
||
|
||
/* Prototypes for supply_gregset etc. */
|
||
#include "gregset.h"
|
||
|
||
void
|
||
supply_gregset (elf_gregset_t *gregsetp)
|
||
{
|
||
elf_greg_t *regp = (elf_greg_t *) gregsetp;
|
||
int regi;
|
||
|
||
for (regi = M68K_D0_REGNUM; regi <= SP_REGNUM; regi++)
|
||
regcache_raw_supply (current_regcache, regi, (char *) ®p[regmap[regi]]);
|
||
regcache_raw_supply (current_regcache, PS_REGNUM, (char *) ®p[PT_SR]);
|
||
regcache_raw_supply (current_regcache, PC_REGNUM, (char *) ®p[PT_PC]);
|
||
}
|
||
|
||
/* Fill register REGNO (if it is a general-purpose register) in
|
||
*GREGSETPS with the value in GDB's register array. If REGNO is -1,
|
||
do this for all registers. */
|
||
void
|
||
fill_gregset (elf_gregset_t *gregsetp, int regno)
|
||
{
|
||
elf_greg_t *regp = (elf_greg_t *) gregsetp;
|
||
int i;
|
||
|
||
for (i = 0; i < NUM_GREGS; i++)
|
||
if (regno == -1 || regno == i)
|
||
regcache_raw_collect (current_regcache, i, regp + regmap[i]);
|
||
}
|
||
|
||
#ifdef HAVE_PTRACE_GETREGS
|
||
|
||
/* Fetch all general-purpose registers from process/thread TID and
|
||
store their values in GDB's register array. */
|
||
|
||
static void
|
||
fetch_regs (int tid)
|
||
{
|
||
elf_gregset_t regs;
|
||
|
||
if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0)
|
||
{
|
||
if (errno == EIO)
|
||
{
|
||
/* The kernel we're running on doesn't support the GETREGS
|
||
request. Reset `have_ptrace_getregs'. */
|
||
have_ptrace_getregs = 0;
|
||
return;
|
||
}
|
||
|
||
perror_with_name (_("Couldn't get registers"));
|
||
}
|
||
|
||
supply_gregset (®s);
|
||
}
|
||
|
||
/* Store all valid general-purpose registers in GDB's register array
|
||
into the process/thread specified by TID. */
|
||
|
||
static void
|
||
store_regs (int tid, int regno)
|
||
{
|
||
elf_gregset_t regs;
|
||
|
||
if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0)
|
||
perror_with_name (_("Couldn't get registers"));
|
||
|
||
fill_gregset (®s, regno);
|
||
|
||
if (ptrace (PTRACE_SETREGS, tid, 0, (int) ®s) < 0)
|
||
perror_with_name (_("Couldn't write registers"));
|
||
}
|
||
|
||
#else
|
||
|
||
static void fetch_regs (int tid) {}
|
||
static void store_regs (int tid, int regno) {}
|
||
|
||
#endif
|
||
|
||
|
||
/* Transfering floating-point registers between GDB, inferiors and cores. */
|
||
|
||
/* What is the address of fpN within the floating-point register set F? */
|
||
#define FPREG_ADDR(f, n) ((char *) &(f)->fpregs[(n) * 3])
|
||
|
||
/* Fill GDB's register array with the floating-point register values in
|
||
*FPREGSETP. */
|
||
|
||
void
|
||
supply_fpregset (elf_fpregset_t *fpregsetp)
|
||
{
|
||
int regi;
|
||
|
||
for (regi = FP0_REGNUM; regi < FP0_REGNUM + 8; regi++)
|
||
regcache_raw_supply (current_regcache, regi,
|
||
FPREG_ADDR (fpregsetp, regi - FP0_REGNUM));
|
||
regcache_raw_supply (current_regcache, M68K_FPC_REGNUM,
|
||
(char *) &fpregsetp->fpcntl[0]);
|
||
regcache_raw_supply (current_regcache, M68K_FPS_REGNUM,
|
||
(char *) &fpregsetp->fpcntl[1]);
|
||
regcache_raw_supply (current_regcache, M68K_FPI_REGNUM,
|
||
(char *) &fpregsetp->fpcntl[2]);
|
||
}
|
||
|
||
/* Fill register REGNO (if it is a floating-point register) in
|
||
*FPREGSETP with the value in GDB's register array. If REGNO is -1,
|
||
do this for all registers. */
|
||
|
||
void
|
||
fill_fpregset (elf_fpregset_t *fpregsetp, int regno)
|
||
{
|
||
int i;
|
||
|
||
/* Fill in the floating-point registers. */
|
||
for (i = FP0_REGNUM; i < FP0_REGNUM + 8; i++)
|
||
if (regno == -1 || regno == i)
|
||
regcache_raw_collect (current_regcache, i,
|
||
FPREG_ADDR (fpregsetp, i - FP0_REGNUM));
|
||
|
||
/* Fill in the floating-point control registers. */
|
||
for (i = M68K_FPC_REGNUM; i <= M68K_FPI_REGNUM; i++)
|
||
if (regno == -1 || regno == i)
|
||
regcache_raw_collect (current_regcache, i,
|
||
(char *) &fpregsetp->fpcntl[i - M68K_FPC_REGNUM]);
|
||
}
|
||
|
||
#ifdef HAVE_PTRACE_GETREGS
|
||
|
||
/* Fetch all floating-point registers from process/thread TID and store
|
||
thier values in GDB's register array. */
|
||
|
||
static void
|
||
fetch_fpregs (int tid)
|
||
{
|
||
elf_fpregset_t fpregs;
|
||
|
||
if (ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs) < 0)
|
||
perror_with_name (_("Couldn't get floating point status"));
|
||
|
||
supply_fpregset (&fpregs);
|
||
}
|
||
|
||
/* Store all valid floating-point registers in GDB's register array
|
||
into the process/thread specified by TID. */
|
||
|
||
static void
|
||
store_fpregs (int tid, int regno)
|
||
{
|
||
elf_fpregset_t fpregs;
|
||
|
||
if (ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs) < 0)
|
||
perror_with_name (_("Couldn't get floating point status"));
|
||
|
||
fill_fpregset (&fpregs, regno);
|
||
|
||
if (ptrace (PTRACE_SETFPREGS, tid, 0, (int) &fpregs) < 0)
|
||
perror_with_name (_("Couldn't write floating point status"));
|
||
}
|
||
|
||
#else
|
||
|
||
static void fetch_fpregs (int tid) {}
|
||
static void store_fpregs (int tid, int regno) {}
|
||
|
||
#endif
|
||
|
||
#endif
|
||
|
||
/* Transferring arbitrary registers between GDB and inferior. */
|
||
|
||
/* Fetch register REGNO from the child process. If REGNO is -1, do
|
||
this for all registers (including the floating point and SSE
|
||
registers). */
|
||
|
||
static void
|
||
m68k_linux_fetch_inferior_registers (int regno)
|
||
{
|
||
int tid;
|
||
|
||
/* Use the old method of peeking around in `struct user' if the
|
||
GETREGS request isn't available. */
|
||
if (! have_ptrace_getregs)
|
||
{
|
||
old_fetch_inferior_registers (regno);
|
||
return;
|
||
}
|
||
|
||
/* GNU/Linux LWP ID's are process ID's. */
|
||
tid = TIDGET (inferior_ptid);
|
||
if (tid == 0)
|
||
tid = PIDGET (inferior_ptid); /* Not a threaded program. */
|
||
|
||
/* Use the PTRACE_GETFPXREGS request whenever possible, since it
|
||
transfers more registers in one system call, and we'll cache the
|
||
results. But remember that fetch_fpxregs can fail, and return
|
||
zero. */
|
||
if (regno == -1)
|
||
{
|
||
fetch_regs (tid);
|
||
|
||
/* The call above might reset `have_ptrace_getregs'. */
|
||
if (! have_ptrace_getregs)
|
||
{
|
||
old_fetch_inferior_registers (-1);
|
||
return;
|
||
}
|
||
|
||
fetch_fpregs (tid);
|
||
return;
|
||
}
|
||
|
||
if (getregs_supplies (regno))
|
||
{
|
||
fetch_regs (tid);
|
||
return;
|
||
}
|
||
|
||
if (getfpregs_supplies (regno))
|
||
{
|
||
fetch_fpregs (tid);
|
||
return;
|
||
}
|
||
|
||
internal_error (__FILE__, __LINE__,
|
||
_("Got request for bad register number %d."), regno);
|
||
}
|
||
|
||
/* Store register REGNO back into the child process. If REGNO is -1,
|
||
do this for all registers (including the floating point and SSE
|
||
registers). */
|
||
static void
|
||
m68k_linux_store_inferior_registers (int regno)
|
||
{
|
||
int tid;
|
||
|
||
/* Use the old method of poking around in `struct user' if the
|
||
SETREGS request isn't available. */
|
||
if (! have_ptrace_getregs)
|
||
{
|
||
old_store_inferior_registers (regno);
|
||
return;
|
||
}
|
||
|
||
/* GNU/Linux LWP ID's are process ID's. */
|
||
tid = TIDGET (inferior_ptid);
|
||
if (tid == 0)
|
||
tid = PIDGET (inferior_ptid); /* Not a threaded program. */
|
||
|
||
/* Use the PTRACE_SETFPREGS requests whenever possible, since it
|
||
transfers more registers in one system call. But remember that
|
||
store_fpregs can fail, and return zero. */
|
||
if (regno == -1)
|
||
{
|
||
store_regs (tid, regno);
|
||
store_fpregs (tid, regno);
|
||
return;
|
||
}
|
||
|
||
if (getregs_supplies (regno))
|
||
{
|
||
store_regs (tid, regno);
|
||
return;
|
||
}
|
||
|
||
if (getfpregs_supplies (regno))
|
||
{
|
||
store_fpregs (tid, regno);
|
||
return;
|
||
}
|
||
|
||
internal_error (__FILE__, __LINE__,
|
||
_("Got request to store bad register number %d."), regno);
|
||
}
|
||
|
||
/* Interpreting register set info found in core files. */
|
||
|
||
/* Provide registers to GDB from a core file.
|
||
|
||
(We can't use the generic version of this function in
|
||
core-regset.c, because we need to use elf_gregset_t instead of
|
||
gregset_t.)
|
||
|
||
CORE_REG_SECT points to an array of bytes, which are the contents
|
||
of a `note' from a core file which BFD thinks might contain
|
||
register contents. CORE_REG_SIZE is its size.
|
||
|
||
WHICH says which register set corelow suspects this is:
|
||
0 --- the general-purpose register set, in elf_gregset_t format
|
||
2 --- the floating-point register set, in elf_fpregset_t format
|
||
|
||
REG_ADDR isn't used on GNU/Linux. */
|
||
|
||
static void
|
||
fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
|
||
int which, CORE_ADDR reg_addr)
|
||
{
|
||
elf_gregset_t gregset;
|
||
elf_fpregset_t fpregset;
|
||
|
||
switch (which)
|
||
{
|
||
case 0:
|
||
if (core_reg_size != sizeof (gregset))
|
||
warning (_("Wrong size gregset in core file."));
|
||
else
|
||
{
|
||
memcpy (&gregset, core_reg_sect, sizeof (gregset));
|
||
supply_gregset (&gregset);
|
||
}
|
||
break;
|
||
|
||
case 2:
|
||
if (core_reg_size != sizeof (fpregset))
|
||
warning (_("Wrong size fpregset in core file."));
|
||
else
|
||
{
|
||
memcpy (&fpregset, core_reg_sect, sizeof (fpregset));
|
||
supply_fpregset (&fpregset);
|
||
}
|
||
break;
|
||
|
||
default:
|
||
/* We've covered all the kinds of registers we know about here,
|
||
so this must be something we wouldn't know what to do with
|
||
anyway. Just ignore it. */
|
||
break;
|
||
}
|
||
}
|
||
|
||
|
||
int
|
||
kernel_u_size (void)
|
||
{
|
||
return (sizeof (struct user));
|
||
}
|
||
|
||
/* Register that we are able to handle GNU/Linux ELF core file
|
||
formats. */
|
||
|
||
static struct core_fns linux_elf_core_fns =
|
||
{
|
||
bfd_target_elf_flavour, /* core_flavour */
|
||
default_check_format, /* check_format */
|
||
default_core_sniffer, /* core_sniffer */
|
||
fetch_core_registers, /* core_read_registers */
|
||
NULL /* next */
|
||
};
|
||
|
||
void _initialize_m68k_linux_nat (void);
|
||
|
||
void
|
||
_initialize_m68k_linux_nat (void)
|
||
{
|
||
struct target_ops *t;
|
||
|
||
/* Fill in the generic GNU/Linux methods. */
|
||
t = linux_target ();
|
||
|
||
/* Add our register access methods. */
|
||
t->to_fetch_registers = m68k_linux_fetch_inferior_registers;
|
||
t->to_store_registers = m68k_linux_store_inferior_registers;
|
||
|
||
/* Register the target. */
|
||
add_target (t);
|
||
|
||
deprecated_add_core_fns (&linux_elf_core_fns);
|
||
}
|