Remove Cell Broadband Engine debugging support

This patch implements removal of Cell/B.E. support, including
- Support for the spu-*-* target
- Support for native stand-alone SPU debugging
- Support for integrated debugging of combined PPU/SPU applications
- Remote debugging (gdbserver) support for all the above.

The patch also removes the TARGET_OBJECT_SPU target object type,
as this is available only on Cell/B.E. targets, including
- Native Linux support
- Core file support (including core file generation)
- Remote target support, including removal of the qXfer:spu:read
  and qXfer:spu:write remote protocal packets and associated
  support in gdbserver.

gdb/ChangeLog
2019-09-20  Ulrich Weigand  <uweigand@de.ibm.com>

	* NEWS: Mention that Cell/B.E. debugging support was removed.
	* MAINTAINERS: Remove spu target.

	* config/djgpp/fnchange.lst: Remove entries for removed files.

	* Makefile.in (ALL_TARGET_OBS): Remove solib-spu.o,
	spu-multiarch.o, and spu-tdep.o.
	(HFILES_NO_SRCDIR): Remove solib-spu.h and spu-tdep.h.
	(ALLDEPFILES): Remove solib-spu.c, spu-linux-nat.c,
	spu-multiarch.c, and spu-tdep.c.
	* spu-linux-nat.c: Remove file.
	* spu-multiarch.c: Remove file.
	* spu-tdep.c: Remove file.
	* spu-tdep.h: Remove file.
	* solib-spu.c: Remove file.
	* solib-spu.h: Remove file.

	* configure.host (powerpc64*-*-linux*): Remove Cell/B.E. support.
	* configure.nat (spu-linux): Remove.
	* configure.tgt (powerpc*-*-linux*): Remove solib-spu.o and
	solib-multiarch.o from gdb_target_obs.
	(spu*-*-*): Remove.

	* arch/ppc-linux-common.h (struct ppc_linux_features): Remove "cell"
	feature flag.
	(ppc_linux_no_features): Update.
	* arch/ppc-linux-common.c (ppc_linux_match_description): Remove
	Cell/B.E. support.
	* arch/ppc-linux-tdesc.h (tdesc_powerpc_cell32l): Remove declaration.
	(tdesc_powerpc_cell64l): Likewise.
	* nat/ppc-linux.h (PPC_FEATURE_CELL): Remove.
	* ppc-linux-nat.c (ppc_linux_nat_target::read_description): Remove
	Cell/B.E. support.
	* ppc-linux-tdep.h: Do not include "solib-spu.h" or "spu-tdep.h".
	Do not include "features/rs6000/powerpc-cell32l.c" or
	"features/rs6000/powerpc-cell64l.c".
	(ppc_linux_spu_section): Remove.
	(ppc_linux_core_read_description): Remove Cell/B.E. support.
	(spe_context_objfile, spe_context_lm_addr, spe_context_offset,
	spe_context_cache_ptid, spe_context_cache_ptid): Remove.
	(ppc_linux_spe_context_lookup): Remove.
	(ppc_linux_spe_context_inferior_created): Remove.
	(ppc_linux_spe_context_solib_loaded): Remove.
	(ppc_linux_spe_context_solib_unloaded): Remove.
	(ppc_linux_spe_context): Remove.
	(struct ppu2spu_cache): Remove.
	(ppu2spu_prev_arch, ppu2spu_this_id, ppu2spu_prev_register): Remove.
	(struct ppu2spu_data): Remove.
	(ppu2spu_unwind_register, ppu2spu_sniffer, ppu2spu_dealloc_cache,
	ppu2spu_unwind): Remove.
	(ppc_linux_init_abi): Remove Cell/B.E. support.
	* rs6000-tdep.h (rs6000_gdbarch_init): Remove Cell/B.E. support.

	* features/Makefile (rs6000/powerpc-cell32l-expedite): Remove.
	(rs6000/powerpc-cell64l-expedite): Likewise
	(WHICH): Remove rs6000/powerpc-cell32l and rs6000/powerpc-cell64l.
	(XMLTOC): Remove rs6000/powerpc-cell32l.xml and
	rs6000/powerpc-cell64l.xml.
	* features/rs6000/powerpc-cell32l.xml: Remove.
	* features/rs6000/powerpc-cell64l.xml: Likewise.
	* features/rs6000/powerpc-cell32l.c: Remove generated file.
	* features/rs6000/powerpc-cell64l.c: Likewise.
	* regformats/rs6000/powerpc-cell32l.dat: Remove generated file.
	* regformats/rs6000/powerpc-cell64l.dat: Likewise.
	* regformats/reg-spu.dat: Remove.

	* target.h (enum target_object): Remove TARGET_OBJECT_SPU.
	* corelow.c (struct spuid_list): Remove.
	(add_to_spuid_list): Remove.
	(core_target::xfer_partial): Remove support for TARGET_OBJECT_SPU.
	* remote.c (PACKET_qXfer_spu_read, PACKET_qXfer_spu_write): Remove.
	(remote_protocol_features): Remove associated entries.
	(_initialize_remote): No longer initialize them.
	(remote_target::xfer_partial): Remove support for TARGET_OBJECT_SPU.
	* linux-nat.c (SPUFS_MAGIC): Remove.
	(linux_proc_xfer_spu): Remove.
	(spu_enumerate_spu_ids): Remove.
	(linux_nat_target::xfer_partial): Remove support for TARGET_OBJECT_SPU.
	* linux-tdep.c (-linux_spu_make_corefile_notes): Remove.
	(linux_make_corefile_notes): No longer call it.

	* regcache.c (cooked_read_test): Remove bfd_arch_spu special case.
	(cooked_write_test): Likewise.

gdb/doc/ChangeLog
2019-09-20  Ulrich Weigand  <uweigand@de.ibm.com>

	* doc/gdb.texinfo (Remote Configuration): Remove documentation for
	qXfer:spu:read and qXfer:spu:write.
	(General Query Packets): Likewise.
	(Cell Broadband Engine SPU architecture): Remove subsection.

gdb/gdbserver/ChangeLog
2019-09-20  Ulrich Weigand  <uweigand@de.ibm.com>

	* configure.srv (ipa_ppc_linux_regobj): Remove powerpc-cell32l-ipa.o
	and powerpc-cell64l-ipa.o.
	(powerpc*-*-linux*): Remove powerpc-cell32l.o and powerpc-cell64l.o
	from srv_regobj.  Remove rs6000/powerpc-cell32l.xml and
	rs6000/powerpc-cell64l.xml from srv_xmlfiles.
	(spu*-*-*): Remove.

	* spu-low.c: Remove file.

	* linux-ppc-low.c (INSTR_SC, NR_spu_run): Remove.
	(parse_spufs_run): Remove.
	(ppc_get_pc): Remove Cell/B.E. support.
	(ppc_set_pc): Likewise.
	(ppc_breakpoint_at): Likewise.
	(ppc_arch_setup): Likewise.
	(ppc_get_ipa_tdesc_idx): Do not handle tdesc_powerpc_cell64l or
	tdesc_powerpc_cell32l.
	(initialize_low_arch): Do not call init_registers_powerpc_cell64l
	or init_registers_powerpc_cell32l.
	* linux-ppc-ipa.c (get_ipa_tdesc): Do not handle PPC_TDESC_CELL.
	(initialize_low_tracepoint): Do not call init_registers_powerpc_cell64l
	or init_registers_powerpc_cell32l.
	* linux-ppc-tdesc-init.h (PPC_TDESC_CELL): Mark as unused.
	(init_registers_powerpc_cell32l): Remove prototype.
	(init_registers_powerpc_cell64l): Likewise.

	* target.h (struct target_ops): Remove qxfer_spu member.
	* server.c (handle_qxfer_spu): Remove.
	(qxfer_packets): Remove entry for "spu".
	(handle_query): No longer support qXfer:spu:read or qXfer:spu:write.
	* linux-low.c (SPUFS_MAGIC): Remove.
	(spu_enumerate_spu_ids): Remove.
	(linux_qxfer_spu): Remove.
	(linux_target_ops): Remove qxfer_spu member.
	* lynx-low.c (lynx_target_ops): Remove qxfer_spu member.
	* nto-low.c (nto_target_ops): Remove qxfer_spu member.
	* win32-low.c (win32_target_ops): Remove qxfer_spu member.

gdb/testsuite/ChangeLog
2019-09-20  Ulrich Weigand  <uweigand@de.ibm.com>

	* gdb.arch/spu-info.exp: Remove file.
	* gdb.arch/spu-info.c: Remove file.
	* gdb.arch/spu-ls.exp: Remove file.
	* gdb.arch/spu-ls.c: Remove file.

	* gdb.asm/asm-source.exp: Remove support for spu*-*-*.
	* gdb.asm/spu.inc: Remove file.

	* gdb.base/dump.exp: Remove support for spu*-*-*.
	* gdb.base/stack-checking.exp: Likewise.
	* gdb.base/overlays.exp: Likewise.
	* gdb.base/ovlymgr.c: Likewise.
	* gdb.base/spu.ld: Remove file.

	* gdb.cp/bs15503.exp: Remove support for spu*-*-*.
	* gdb.cp/cpexprs.exp: Likewise.
	* gdb.cp/exception.exp: Likewise.
	* gdb.cp/gdb2495.exp: Likewise.
	* gdb.cp/mb-templates.exp: Likewise.
	* gdb.cp/pr9167.exp: Likewise.
	* gdb.cp/userdef.exp: Likewise.

	* gdb.xml/tdesc-regs.exp: Remove support for spu*-*-*.

	* gdb.cell: Remove directory.
	* lib/cell.exp: Remove file.

1 files changed, 0 insertions, 235 deletions

diff --git a/gdb/testsuite/gdb.arch/spu-info.c b/gdb/testsuite/gdb.arch/spu-info.c
deleted file mode 100644
index 3046525..0000000
--- a/gdb/testsuite/gdb.arch/spu-info.c
+++ /dev/null
@@ -1,235 +0,0 @@
-/* Copyright 2007-2019 Free Software Foundation, Inc.
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 3 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-   This file is part of the gdb testsuite.
-
-   Contributed by Markus Deuling <deuling@de.ibm.com>.
-   Tests for 'info spu' commands.  */
-
-#include <stdio.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <spu_mfcio.h>
-
-
-/* PPE-assisted call interface.  */
-void
-send_to_ppe (unsigned int signalcode, unsigned int opcode, void *data)
-{
-  __vector unsigned int stopfunc =
-    {
-      signalcode,     /* stop */
-      (opcode << 24) | (unsigned int) data,
-      0x4020007f,     /* nop */
-      0x35000000      /* bi $0 */
-    };
-
-  void (*f) (void) = (void *) &stopfunc;
-  asm ("sync");
-  f ();
-}
-
-/* PPE-assisted call to mmap from SPU.  */
-unsigned long long
-mmap_ea (unsigned long long start, size_t length,
-         int prot, int flags, int fd, off_t offset)
-{
-  struct mmap_args
-    {
-      unsigned long long start __attribute__ ((aligned (16)));
-      size_t length __attribute__ ((aligned (16)));
-      int prot __attribute__ ((aligned (16)));
-      int flags __attribute__ ((aligned (16)));
-      int fd __attribute__ ((aligned (16)));
-      off_t offset __attribute__ ((aligned (16)));
-    } args;
-
-  args.start = start;
-  args.length = length;
-  args.prot = prot;
-  args.flags = flags;
-  args.fd = fd;
-  args.offset = offset;
-
-  send_to_ppe (0x2101, 11, &args);
-  return args.start;
-}
-
-/* This works only in a Linux environment with <= 1024 open
-   file descriptors for one process. Result is the file
-   descriptor for the current context if available.  */
-int
-find_context_fd (void)
-{
-  int dir_fd = -1;
-  int i;
-
-  for (i = 0; i < 1024; i++)
-    {
-      struct stat stat;
-
-      if (fstat (i, &stat) < 0)
-        break;
-      if (S_ISDIR (stat.st_mode))
-        dir_fd = dir_fd == -1 ? i : -2;
-    }
-  return dir_fd < 0 ? -1 : dir_fd;
-}
-
-/* Open the context file and return the file handler.  */
-int
-open_context_file (int context_fd, char *name, int flags)
-{
-  char buf[128];
-
-  if (context_fd < 0)
-    return -1;
-
-  sprintf (buf, "/proc/self/fd/%d/%s", context_fd, name);
-  return open (buf, flags);
-}
-
-
-int
-do_event_test ()
-{
-  spu_write_event_mask (MFC_MULTI_SRC_SYNC_EVENT); /* 0x1000 */  /* Marker Event */
-  spu_write_event_mask (MFC_PRIV_ATTN_EVENT); /* 0x0800 */
-  spu_write_event_mask (MFC_LLR_LOST_EVENT); /* 0x0400 */
-  spu_write_event_mask (MFC_SIGNAL_NOTIFY_1_EVENT); /* 0x0200 */
-  spu_write_event_mask (MFC_SIGNAL_NOTIFY_2_EVENT); /* 0x0100 */
-  spu_write_event_mask (MFC_OUT_MBOX_AVAILABLE_EVENT); /* 0x0080 */
-  spu_write_event_mask (MFC_OUT_INTR_MBOX_AVAILABLE_EVENT); /* 0x0040 */
-  spu_write_event_mask (MFC_DECREMENTER_EVENT); /* 0x0020 */
-  spu_write_event_mask (MFC_IN_MBOX_AVAILABLE_EVENT); /* 0x0010 */
-  spu_write_event_mask (MFC_COMMAND_QUEUE_AVAILABLE_EVENT); /* 0x0008 */
-  spu_write_event_mask (MFC_LIST_STALL_NOTIFY_EVENT); /* 0x0002 */
-  spu_write_event_mask (MFC_TAG_STATUS_UPDATE_EVENT); /* 0x0001 */
-
-  return 0;
-}
-
-int
-do_dma_test ()
-{
-  #define MAP_FAILED      (-1ULL)
-  #define PROT_READ       0x1
-  #define MAP_PRIVATE     0x002
-  #define BSIZE 128
-  static char buf[BSIZE] __attribute__ ((aligned (128)));
-  char *file = "/var/tmp/tmp_buf";
-  struct stat fdstat;
-  int fd, cnt;
-  unsigned long long src;
-
-  /* Create a file and fill it with some bytes.  */
-  fd = open (file, O_CREAT | O_RDWR | O_TRUNC, 0777);
-  if (fd == -1)
-    return -1;
-  memset ((void *)buf, '1', BSIZE);
-  write (fd, buf, BSIZE);
-  write (fd, buf, BSIZE);
-  memset ((void *)buf, 0, BSIZE);
-
-  if (fstat (fd, &fdstat) != 0
-      || !fdstat.st_size)
-    return -2;
-
-  src = mmap_ea(0ULL, fdstat.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
-  if (src == MAP_FAILED)
-    return -3;
-
-  /* Copy some data via DMA.  */
-  mfc_get (&buf, src, BSIZE, 5, 0, 0);   /* Marker DMA */
-  mfc_write_tag_mask (1<<5);   /* Marker DMAWait */
-  spu_mfcstat (MFC_TAG_UPDATE_ALL);
-
-  /* Close the file.  */
-  close (fd);
-
-  return cnt;
-}
-
-int
-do_mailbox_test ()
-{
-  /* Write to SPU Outbound Mailbox.  */
-  if (spu_stat_out_mbox ())            /* Marker Mbox */
-    spu_write_out_mbox (0x12345678);
-
-  /* Write to SPU Outbound Interrupt Mailbox.  */
-  if (spu_stat_out_intr_mbox ())
-    spu_write_out_intr_mbox (0x12345678);
-
-  return 0;       /* Marker MboxEnd */
-}
-
-int
-do_signal_test ()
-{
-  struct stat fdstat;
-  int context_fd = find_context_fd ();
-  int ret, buf, fd;
-
-  buf = 23;    /* Marker Signal */
-  /* Write to signal1.  */
-  fd = open_context_file (context_fd, "signal1", O_RDWR);
-  if (fstat (fd, &fdstat) != 0)
-    return -1;
-  ret = write (fd, &buf, sizeof (int));
-  close (fd);  /* Marker Signal1 */
-
-  /* Write to signal2.  */
-  fd = open_context_file (context_fd, "signal2", O_RDWR);
-  if (fstat (fd, &fdstat) != 0)
-    return -1;
-  ret = write (fd, &buf, sizeof (int));
-  close (fd);  /* Marker Signal2 */
-
-  /* Read signal1.  */
-  if (spu_stat_signal1 ())
-    ret = spu_read_signal1 ();
-
-  /* Read signal2.  */
-  if (spu_stat_signal2 ())
-    ret = spu_read_signal2 ();   /* Marker SignalRead */
-
-  return 0;
-}
-
-int
-main (unsigned long long speid, unsigned long long argp, 
-      unsigned long long envp)
-{
-  int res;
-
-  /* info spu event  */
-  res = do_event_test ();
-
-  /* info spu dma  */
-  res = do_dma_test ();
-
-  /* info spu mailbox  */
-  res = do_mailbox_test ();
-
-  /* info spu signal  */
-  res = do_signal_test ();
-
-  return 0;
-}
-