mirror of
https://sourceware.org/git/binutils-gdb.git
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268a13a5a3
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.
663 lines
18 KiB
C
663 lines
18 KiB
C
/* SPU native-dependent code for GDB, the GNU debugger.
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Copyright (C) 2006-2019 Free Software Foundation, Inc.
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Contributed by Ulrich Weigand <uweigand@de.ibm.com>.
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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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#include "defs.h"
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#include "gdbcore.h"
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#include "target.h"
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#include "inferior.h"
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#include "inf-child.h"
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#include "inf-ptrace.h"
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#include "regcache.h"
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#include "symfile.h"
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#include "gdbsupport/gdb_wait.h"
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#include "gdbthread.h"
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#include "gdb_bfd.h"
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#include "nat/gdb_ptrace.h"
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#include <asm/ptrace.h>
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#include <sys/types.h>
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#include "spu-tdep.h"
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/* PPU side system calls. */
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#define INSTR_SC 0x44000002
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#define NR_spu_run 0x0116
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class spu_linux_nat_target final : public inf_ptrace_target
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{
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public:
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void fetch_registers (struct regcache *regcache, int regnum) override;
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void store_registers (struct regcache *regcache, int regnum) override;
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void post_attach (int) override;
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void post_startup_inferior (ptid_t) override;
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ptid_t wait (ptid_t, struct target_waitstatus *, int options) override;
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enum target_xfer_status xfer_partial (enum target_object object,
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const char *annex,
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gdb_byte *readbuf,
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const gdb_byte *writebuf,
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ULONGEST offset, ULONGEST len,
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ULONGEST *xfered_len) override;
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int can_use_hw_breakpoint (enum bptype, int, int) override;
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};
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static spu_linux_nat_target the_spu_linux_nat_target;
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/* Fetch PPU register REGNO. */
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static ULONGEST
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fetch_ppc_register (int regno)
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{
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PTRACE_TYPE_RET res;
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int tid = inferior_ptid.lwp ();
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if (tid == 0)
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tid = inferior_ptid.pid ();
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#ifndef __powerpc64__
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/* If running as a 32-bit process on a 64-bit system, we attempt
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to get the full 64-bit register content of the target process.
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If the PPC special ptrace call fails, we're on a 32-bit system;
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just fall through to the regular ptrace call in that case. */
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{
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gdb_byte buf[8];
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errno = 0;
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ptrace (PPC_PTRACE_PEEKUSR_3264, tid,
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(PTRACE_TYPE_ARG3) (regno * 8), buf);
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if (errno == 0)
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ptrace (PPC_PTRACE_PEEKUSR_3264, tid,
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(PTRACE_TYPE_ARG3) (regno * 8 + 4), buf + 4);
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if (errno == 0)
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return (ULONGEST) *(uint64_t *)buf;
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}
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#endif
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errno = 0;
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res = ptrace (PT_READ_U, tid,
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(PTRACE_TYPE_ARG3) (regno * sizeof (PTRACE_TYPE_RET)), 0);
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if (errno != 0)
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{
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char mess[128];
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xsnprintf (mess, sizeof mess, "reading PPC register #%d", regno);
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perror_with_name (_(mess));
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}
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return (ULONGEST) (unsigned long) res;
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}
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/* Fetch WORD from PPU memory at (aligned) MEMADDR in thread TID. */
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static int
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fetch_ppc_memory_1 (int tid, ULONGEST memaddr, PTRACE_TYPE_RET *word)
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{
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errno = 0;
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#ifndef __powerpc64__
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if (memaddr >> 32)
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{
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uint64_t addr_8 = (uint64_t) memaddr;
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ptrace (PPC_PTRACE_PEEKTEXT_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word);
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}
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else
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#endif
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*word = ptrace (PT_READ_I, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, 0);
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return errno;
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}
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/* Store WORD into PPU memory at (aligned) MEMADDR in thread TID. */
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static int
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store_ppc_memory_1 (int tid, ULONGEST memaddr, PTRACE_TYPE_RET word)
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{
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errno = 0;
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#ifndef __powerpc64__
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if (memaddr >> 32)
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{
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uint64_t addr_8 = (uint64_t) memaddr;
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ptrace (PPC_PTRACE_POKEDATA_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word);
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}
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else
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#endif
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ptrace (PT_WRITE_D, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, word);
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return errno;
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}
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/* Fetch LEN bytes of PPU memory at MEMADDR to MYADDR. */
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static int
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fetch_ppc_memory (ULONGEST memaddr, gdb_byte *myaddr, int len)
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{
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int i, ret;
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ULONGEST addr = memaddr & -(ULONGEST) sizeof (PTRACE_TYPE_RET);
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int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1)
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/ sizeof (PTRACE_TYPE_RET));
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PTRACE_TYPE_RET *buffer;
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int tid = inferior_ptid.lwp ();
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if (tid == 0)
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tid = inferior_ptid.pid ();
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buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET));
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for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET))
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{
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ret = fetch_ppc_memory_1 (tid, addr, &buffer[i]);
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if (ret)
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return ret;
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}
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memcpy (myaddr,
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(char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)),
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len);
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return 0;
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}
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/* Store LEN bytes from MYADDR to PPU memory at MEMADDR. */
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static int
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store_ppc_memory (ULONGEST memaddr, const gdb_byte *myaddr, int len)
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{
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int i, ret;
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ULONGEST addr = memaddr & -(ULONGEST) sizeof (PTRACE_TYPE_RET);
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int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1)
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/ sizeof (PTRACE_TYPE_RET));
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PTRACE_TYPE_RET *buffer;
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int tid = inferior_ptid.lwp ();
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if (tid == 0)
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tid = inferior_ptid.pid ();
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buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET));
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if (addr != memaddr || len < (int) sizeof (PTRACE_TYPE_RET))
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{
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ret = fetch_ppc_memory_1 (tid, addr, &buffer[0]);
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if (ret)
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return ret;
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}
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if (count > 1)
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{
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ret = fetch_ppc_memory_1 (tid, addr + (count - 1)
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* sizeof (PTRACE_TYPE_RET),
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&buffer[count - 1]);
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if (ret)
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return ret;
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}
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memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)),
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myaddr, len);
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for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET))
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{
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ret = store_ppc_memory_1 (tid, addr, buffer[i]);
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if (ret)
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return ret;
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}
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return 0;
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}
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/* If the PPU thread is currently stopped on a spu_run system call,
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return to FD and ADDR the file handle and NPC parameter address
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used with the system call. Return non-zero if successful. */
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static int
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parse_spufs_run (int *fd, ULONGEST *addr)
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{
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enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
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gdb_byte buf[4];
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ULONGEST pc = fetch_ppc_register (32); /* nip */
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/* Fetch instruction preceding current NIP. */
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if (fetch_ppc_memory (pc-4, buf, 4) != 0)
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return 0;
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/* It should be a "sc" instruction. */
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if (extract_unsigned_integer (buf, 4, byte_order) != INSTR_SC)
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return 0;
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/* System call number should be NR_spu_run. */
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if (fetch_ppc_register (0) != NR_spu_run)
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return 0;
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/* Register 3 contains fd, register 4 the NPC param pointer. */
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*fd = fetch_ppc_register (34); /* orig_gpr3 */
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*addr = fetch_ppc_register (4);
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return 1;
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}
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/* Implement the to_xfer_partial target_ops method for TARGET_OBJECT_SPU.
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Copy LEN bytes at OFFSET in spufs file ANNEX into/from READBUF or WRITEBUF,
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using the /proc file system. */
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static enum target_xfer_status
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spu_proc_xfer_spu (const char *annex, gdb_byte *readbuf,
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const gdb_byte *writebuf,
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ULONGEST offset, ULONGEST len, ULONGEST *xfered_len)
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{
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char buf[128];
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int fd = 0;
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int ret = -1;
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int pid = inferior_ptid.pid ();
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if (!annex)
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return TARGET_XFER_EOF;
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xsnprintf (buf, sizeof buf, "/proc/%d/fd/%s", pid, annex);
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fd = open (buf, writebuf? O_WRONLY : O_RDONLY);
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if (fd <= 0)
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return TARGET_XFER_E_IO;
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if (offset != 0
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&& lseek (fd, (off_t) offset, SEEK_SET) != (off_t) offset)
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{
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close (fd);
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return TARGET_XFER_EOF;
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}
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if (writebuf)
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ret = write (fd, writebuf, (size_t) len);
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else if (readbuf)
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ret = read (fd, readbuf, (size_t) len);
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close (fd);
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if (ret < 0)
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return TARGET_XFER_E_IO;
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else if (ret == 0)
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return TARGET_XFER_EOF;
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else
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{
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*xfered_len = (ULONGEST) ret;
|
|
return TARGET_XFER_OK;
|
|
}
|
|
}
|
|
|
|
|
|
/* Inferior memory should contain an SPE executable image at location ADDR.
|
|
Allocate a BFD representing that executable. Return NULL on error. */
|
|
|
|
static void *
|
|
spu_bfd_iovec_open (struct bfd *nbfd, void *open_closure)
|
|
{
|
|
return open_closure;
|
|
}
|
|
|
|
static int
|
|
spu_bfd_iovec_close (struct bfd *nbfd, void *stream)
|
|
{
|
|
xfree (stream);
|
|
|
|
/* Zero means success. */
|
|
return 0;
|
|
}
|
|
|
|
static file_ptr
|
|
spu_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf,
|
|
file_ptr nbytes, file_ptr offset)
|
|
{
|
|
ULONGEST addr = *(ULONGEST *)stream;
|
|
|
|
if (fetch_ppc_memory (addr + offset, (gdb_byte *)buf, nbytes) != 0)
|
|
{
|
|
bfd_set_error (bfd_error_invalid_operation);
|
|
return -1;
|
|
}
|
|
|
|
return nbytes;
|
|
}
|
|
|
|
static int
|
|
spu_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb)
|
|
{
|
|
/* We don't have an easy way of finding the size of embedded spu
|
|
images. We could parse the in-memory ELF header and section
|
|
table to find the extent of the last section but that seems
|
|
pointless when the size is needed only for checks of other
|
|
parsed values in dbxread.c. */
|
|
memset (sb, 0, sizeof (struct stat));
|
|
sb->st_size = INT_MAX;
|
|
return 0;
|
|
}
|
|
|
|
static gdb_bfd_ref_ptr
|
|
spu_bfd_open (ULONGEST addr)
|
|
{
|
|
asection *spu_name;
|
|
|
|
ULONGEST *open_closure = XNEW (ULONGEST);
|
|
*open_closure = addr;
|
|
|
|
gdb_bfd_ref_ptr nbfd (gdb_bfd_openr_iovec ("<in-memory>", "elf32-spu",
|
|
spu_bfd_iovec_open, open_closure,
|
|
spu_bfd_iovec_pread,
|
|
spu_bfd_iovec_close,
|
|
spu_bfd_iovec_stat));
|
|
if (nbfd == NULL)
|
|
return NULL;
|
|
|
|
if (!bfd_check_format (nbfd.get (), bfd_object))
|
|
return NULL;
|
|
|
|
/* Retrieve SPU name note and update BFD name. */
|
|
spu_name = bfd_get_section_by_name (nbfd.get (), ".note.spu_name");
|
|
if (spu_name)
|
|
{
|
|
int sect_size = bfd_section_size (nbfd.get (), spu_name);
|
|
if (sect_size > 20)
|
|
{
|
|
char *buf = (char *)alloca (sect_size - 20 + 1);
|
|
bfd_get_section_contents (nbfd.get (), spu_name, buf, 20,
|
|
sect_size - 20);
|
|
buf[sect_size - 20] = '\0';
|
|
|
|
xfree ((char *)nbfd->filename);
|
|
nbfd->filename = xstrdup (buf);
|
|
}
|
|
}
|
|
|
|
return nbfd;
|
|
}
|
|
|
|
/* INFERIOR_FD is a file handle passed by the inferior to the
|
|
spu_run system call. Assuming the SPE context was allocated
|
|
by the libspe library, try to retrieve the main SPE executable
|
|
file from its copy within the target process. */
|
|
static void
|
|
spu_symbol_file_add_from_memory (int inferior_fd)
|
|
{
|
|
ULONGEST addr;
|
|
|
|
gdb_byte id[128];
|
|
char annex[32];
|
|
ULONGEST len;
|
|
enum target_xfer_status status;
|
|
|
|
/* Read object ID. */
|
|
xsnprintf (annex, sizeof annex, "%d/object-id", inferior_fd);
|
|
status = spu_proc_xfer_spu (annex, id, NULL, 0, sizeof id, &len);
|
|
if (status != TARGET_XFER_OK || len >= sizeof id)
|
|
return;
|
|
id[len] = 0;
|
|
addr = strtoulst ((const char *) id, NULL, 16);
|
|
if (!addr)
|
|
return;
|
|
|
|
/* Open BFD representing SPE executable and read its symbols. */
|
|
gdb_bfd_ref_ptr nbfd (spu_bfd_open (addr));
|
|
if (nbfd != NULL)
|
|
{
|
|
symbol_file_add_from_bfd (nbfd.get (), bfd_get_filename (nbfd),
|
|
SYMFILE_VERBOSE | SYMFILE_MAINLINE,
|
|
NULL, 0, NULL);
|
|
}
|
|
}
|
|
|
|
|
|
/* Override the post_startup_inferior routine to continue running
|
|
the inferior until the first spu_run system call. */
|
|
void
|
|
spu_linux_nat_target::post_startup_inferior (ptid_t ptid)
|
|
{
|
|
int fd;
|
|
ULONGEST addr;
|
|
|
|
int tid = ptid.lwp ();
|
|
if (tid == 0)
|
|
tid = ptid.pid ();
|
|
|
|
while (!parse_spufs_run (&fd, &addr))
|
|
{
|
|
ptrace (PT_SYSCALL, tid, (PTRACE_TYPE_ARG3) 0, 0);
|
|
waitpid (tid, NULL, __WALL | __WNOTHREAD);
|
|
}
|
|
}
|
|
|
|
/* Override the post_attach routine to try load the SPE executable
|
|
file image from its copy inside the target process. */
|
|
void
|
|
spu_linux_nat_target::post_attach (int pid)
|
|
{
|
|
int fd;
|
|
ULONGEST addr;
|
|
|
|
/* Like child_post_startup_inferior, if we happened to attach to
|
|
the inferior while it wasn't currently in spu_run, continue
|
|
running it until we get back there. */
|
|
while (!parse_spufs_run (&fd, &addr))
|
|
{
|
|
ptrace (PT_SYSCALL, pid, (PTRACE_TYPE_ARG3) 0, 0);
|
|
waitpid (pid, NULL, __WALL | __WNOTHREAD);
|
|
}
|
|
|
|
/* If the user has not provided an executable file, try to extract
|
|
the image from inside the target process. */
|
|
if (!get_exec_file (0))
|
|
spu_symbol_file_add_from_memory (fd);
|
|
}
|
|
|
|
/* Wait for child PTID to do something. Return id of the child,
|
|
minus_one_ptid in case of error; store status into *OURSTATUS. */
|
|
ptid_t
|
|
spu_linux_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus,
|
|
int options)
|
|
{
|
|
int save_errno;
|
|
int status;
|
|
pid_t pid;
|
|
|
|
do
|
|
{
|
|
set_sigint_trap (); /* Causes SIGINT to be passed on to the
|
|
attached process. */
|
|
|
|
pid = waitpid (ptid.pid (), &status, 0);
|
|
if (pid == -1 && errno == ECHILD)
|
|
/* Try again with __WCLONE to check cloned processes. */
|
|
pid = waitpid (ptid.pid (), &status, __WCLONE);
|
|
|
|
save_errno = errno;
|
|
|
|
/* Make sure we don't report an event for the exit of the
|
|
original program, if we've detached from it. */
|
|
if (pid != -1 && !WIFSTOPPED (status)
|
|
&& pid != inferior_ptid.pid ())
|
|
{
|
|
pid = -1;
|
|
save_errno = EINTR;
|
|
}
|
|
|
|
clear_sigint_trap ();
|
|
}
|
|
while (pid == -1 && save_errno == EINTR);
|
|
|
|
if (pid == -1)
|
|
{
|
|
warning (_("Child process unexpectedly missing: %s"),
|
|
safe_strerror (save_errno));
|
|
|
|
/* Claim it exited with unknown signal. */
|
|
ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
|
|
ourstatus->value.sig = GDB_SIGNAL_UNKNOWN;
|
|
return inferior_ptid;
|
|
}
|
|
|
|
store_waitstatus (ourstatus, status);
|
|
return ptid_t (pid);
|
|
}
|
|
|
|
/* Override the fetch_inferior_register routine. */
|
|
void
|
|
spu_linux_nat_target::fetch_registers (struct regcache *regcache, int regno)
|
|
{
|
|
int fd;
|
|
ULONGEST addr;
|
|
|
|
/* Since we use functions that rely on inferior_ptid, we need to set and
|
|
restore it. */
|
|
scoped_restore save_ptid
|
|
= make_scoped_restore (&inferior_ptid, regcache->ptid ());
|
|
|
|
/* We must be stopped on a spu_run system call. */
|
|
if (!parse_spufs_run (&fd, &addr))
|
|
return;
|
|
|
|
/* The ID register holds the spufs file handle. */
|
|
if (regno == -1 || regno == SPU_ID_REGNUM)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
gdb_byte buf[4];
|
|
store_unsigned_integer (buf, 4, byte_order, fd);
|
|
regcache->raw_supply (SPU_ID_REGNUM, buf);
|
|
}
|
|
|
|
/* The NPC register is found at ADDR. */
|
|
if (regno == -1 || regno == SPU_PC_REGNUM)
|
|
{
|
|
gdb_byte buf[4];
|
|
if (fetch_ppc_memory (addr, buf, 4) == 0)
|
|
regcache->raw_supply (SPU_PC_REGNUM, buf);
|
|
}
|
|
|
|
/* The GPRs are found in the "regs" spufs file. */
|
|
if (regno == -1 || (regno >= 0 && regno < SPU_NUM_GPRS))
|
|
{
|
|
gdb_byte buf[16 * SPU_NUM_GPRS];
|
|
char annex[32];
|
|
int i;
|
|
ULONGEST len;
|
|
|
|
xsnprintf (annex, sizeof annex, "%d/regs", fd);
|
|
if ((spu_proc_xfer_spu (annex, buf, NULL, 0, sizeof buf, &len)
|
|
== TARGET_XFER_OK)
|
|
&& len == sizeof buf)
|
|
for (i = 0; i < SPU_NUM_GPRS; i++)
|
|
regcache->raw_supply (i, buf + i*16);
|
|
}
|
|
}
|
|
|
|
/* Override the store_inferior_register routine. */
|
|
void
|
|
spu_linux_nat_target::store_registers (struct regcache *regcache, int regno)
|
|
{
|
|
int fd;
|
|
ULONGEST addr;
|
|
|
|
/* Since we use functions that rely on inferior_ptid, we need to set and
|
|
restore it. */
|
|
scoped_restore save_ptid
|
|
= make_scoped_restore (&inferior_ptid, regcache->ptid ());
|
|
|
|
/* We must be stopped on a spu_run system call. */
|
|
if (!parse_spufs_run (&fd, &addr))
|
|
return;
|
|
|
|
/* The NPC register is found at ADDR. */
|
|
if (regno == -1 || regno == SPU_PC_REGNUM)
|
|
{
|
|
gdb_byte buf[4];
|
|
regcache->raw_collect (SPU_PC_REGNUM, buf);
|
|
store_ppc_memory (addr, buf, 4);
|
|
}
|
|
|
|
/* The GPRs are found in the "regs" spufs file. */
|
|
if (regno == -1 || (regno >= 0 && regno < SPU_NUM_GPRS))
|
|
{
|
|
gdb_byte buf[16 * SPU_NUM_GPRS];
|
|
char annex[32];
|
|
int i;
|
|
ULONGEST len;
|
|
|
|
for (i = 0; i < SPU_NUM_GPRS; i++)
|
|
regcache->raw_collect (i, buf + i*16);
|
|
|
|
xsnprintf (annex, sizeof annex, "%d/regs", fd);
|
|
spu_proc_xfer_spu (annex, NULL, buf, 0, sizeof buf, &len);
|
|
}
|
|
}
|
|
|
|
/* Override the to_xfer_partial routine. */
|
|
enum target_xfer_status
|
|
spu_linux_nat_target::xfer_partial (enum target_object object, const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, ULONGEST len,
|
|
ULONGEST *xfered_len)
|
|
{
|
|
if (object == TARGET_OBJECT_SPU)
|
|
return spu_proc_xfer_spu (annex, readbuf, writebuf, offset, len,
|
|
xfered_len);
|
|
|
|
if (object == TARGET_OBJECT_MEMORY)
|
|
{
|
|
int fd;
|
|
ULONGEST addr;
|
|
char mem_annex[32], lslr_annex[32];
|
|
gdb_byte buf[32];
|
|
ULONGEST lslr;
|
|
enum target_xfer_status ret;
|
|
|
|
/* We must be stopped on a spu_run system call. */
|
|
if (!parse_spufs_run (&fd, &addr))
|
|
return TARGET_XFER_EOF;
|
|
|
|
/* Use the "mem" spufs file to access SPU local store. */
|
|
xsnprintf (mem_annex, sizeof mem_annex, "%d/mem", fd);
|
|
ret = spu_proc_xfer_spu (mem_annex, readbuf, writebuf, offset, len,
|
|
xfered_len);
|
|
if (ret == TARGET_XFER_OK)
|
|
return ret;
|
|
|
|
/* SPU local store access wraps the address around at the
|
|
local store limit. We emulate this here. To avoid needing
|
|
an extra access to retrieve the LSLR, we only do that after
|
|
trying the original address first, and getting end-of-file. */
|
|
xsnprintf (lslr_annex, sizeof lslr_annex, "%d/lslr", fd);
|
|
memset (buf, 0, sizeof buf);
|
|
if (spu_proc_xfer_spu (lslr_annex, buf, NULL, 0, sizeof buf, xfered_len)
|
|
!= TARGET_XFER_OK)
|
|
return ret;
|
|
|
|
lslr = strtoulst ((const char *) buf, NULL, 16);
|
|
return spu_proc_xfer_spu (mem_annex, readbuf, writebuf,
|
|
offset & lslr, len, xfered_len);
|
|
}
|
|
|
|
return TARGET_XFER_E_IO;
|
|
}
|
|
|
|
/* Override the to_can_use_hw_breakpoint routine. */
|
|
int
|
|
spu_linux_nat_target::can_use_hw_breakpoint (enum bptype type,
|
|
int cnt, int othertype)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* Initialize SPU native target. */
|
|
void
|
|
_initialize_spu_nat (void)
|
|
{
|
|
add_inf_child_target (&the_spu_linux_nat_target);
|
|
}
|