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.

3 files changed, 0 insertions, 357 deletions

diff --git a/gdb/regformats/reg-spu.dat b/gdb/regformats/reg-spu.dat
deleted file mode 100644
index fb69119..0000000
--- a/gdb/regformats/reg-spu.dat
+++ /dev/null
@@ -1,133 +0,0 @@
-name:spu
-xmlarch:spu
-expedite:r0,r1,npc
-128:r0
-128:r1
-128:r2
-128:r3
-128:r4
-128:r5
-128:r6
-128:r7
-128:r8
-128:r9
-128:r10
-128:r11
-128:r12
-128:r13
-128:r14
-128:r15
-128:r16
-128:r17
-128:r18
-128:r19
-128:r20
-128:r21
-128:r22
-128:r23
-128:r24
-128:r25
-128:r26
-128:r27
-128:r28
-128:r29
-128:r30
-128:r31
-128:r32
-128:r33
-128:r34
-128:r35
-128:r36
-128:r37
-128:r38
-128:r39
-128:r40
-128:r41
-128:r42
-128:r43
-128:r44
-128:r45
-128:r46
-128:r47
-128:r48
-128:r49
-128:r50
-128:r51
-128:r52
-128:r53
-128:r54
-128:r55
-128:r56
-128:r57
-128:r58
-128:r59
-128:r60
-128:r61
-128:r62
-128:r63
-128:r64
-128:r65
-128:r66
-128:r67
-128:r68
-128:r69
-128:r70
-128:r71
-128:r72
-128:r73
-128:r74
-128:r75
-128:r76
-128:r77
-128:r78
-128:r79
-128:r80
-128:r81
-128:r82
-128:r83
-128:r84
-128:r85
-128:r86
-128:r87
-128:r88
-128:r89
-128:r90
-128:r91
-128:r92
-128:r93
-128:r94
-128:r95
-128:r96
-128:r97
-128:r98
-128:r99
-128:r100
-128:r101
-128:r102
-128:r103
-128:r104
-128:r105
-128:r106
-128:r107
-128:r108
-128:r109
-128:r110
-128:r111
-128:r112
-128:r113
-128:r114
-128:r115
-128:r116
-128:r117
-128:r118
-128:r119
-128:r120
-128:r121
-128:r122
-128:r123
-128:r124
-128:r125
-128:r126
-128:r127
-32:id
-32:npc
diff --git a/gdb/regformats/rs6000/powerpc-cell32l.dat b/gdb/regformats/rs6000/powerpc-cell32l.dat
deleted file mode 100644
index bd28505..0000000
--- a/gdb/regformats/rs6000/powerpc-cell32l.dat
+++ /dev/null
@@ -1,112 +0,0 @@
-# THIS FILE IS GENERATED.  -*- buffer-read-only: t -*- vi :set ro:
-# Generated from: rs6000/powerpc-cell32l.xml
-name:powerpc_cell32l
-xmltarget:powerpc-cell32l.xml
-expedite:r1,pc,r0,orig_r3,r4
-32:r0
-32:r1
-32:r2
-32:r3
-32:r4
-32:r5
-32:r6
-32:r7
-32:r8
-32:r9
-32:r10
-32:r11
-32:r12
-32:r13
-32:r14
-32:r15
-32:r16
-32:r17
-32:r18
-32:r19
-32:r20
-32:r21
-32:r22
-32:r23
-32:r24
-32:r25
-32:r26
-32:r27
-32:r28
-32:r29
-32:r30
-32:r31
-64:f0
-64:f1
-64:f2
-64:f3
-64:f4
-64:f5
-64:f6
-64:f7
-64:f8
-64:f9
-64:f10
-64:f11
-64:f12
-64:f13
-64:f14
-64:f15
-64:f16
-64:f17
-64:f18
-64:f19
-64:f20
-64:f21
-64:f22
-64:f23
-64:f24
-64:f25
-64:f26
-64:f27
-64:f28
-64:f29
-64:f30
-64:f31
-32:pc
-32:msr
-32:cr
-32:lr
-32:ctr
-32:xer
-32:fpscr
-32:orig_r3
-32:trap
-128:vr0
-128:vr1
-128:vr2
-128:vr3
-128:vr4
-128:vr5
-128:vr6
-128:vr7
-128:vr8
-128:vr9
-128:vr10
-128:vr11
-128:vr12
-128:vr13
-128:vr14
-128:vr15
-128:vr16
-128:vr17
-128:vr18
-128:vr19
-128:vr20
-128:vr21
-128:vr22
-128:vr23
-128:vr24
-128:vr25
-128:vr26
-128:vr27
-128:vr28
-128:vr29
-128:vr30
-128:vr31
-32:vscr
-32:vrsave
diff --git a/gdb/regformats/rs6000/powerpc-cell64l.dat b/gdb/regformats/rs6000/powerpc-cell64l.dat
deleted file mode 100644
index b5b162e..0000000
--- a/gdb/regformats/rs6000/powerpc-cell64l.dat
+++ /dev/null
@@ -1,112 +0,0 @@
-# THIS FILE IS GENERATED.  -*- buffer-read-only: t -*- vi :set ro:
-# Generated from: rs6000/powerpc-cell64l.xml
-name:powerpc_cell64l
-xmltarget:powerpc-cell64l.xml
-expedite:r1,pc,r0,orig_r3,r4
-64:r0
-64:r1
-64:r2
-64:r3
-64:r4
-64:r5
-64:r6
-64:r7
-64:r8
-64:r9
-64:r10
-64:r11
-64:r12
-64:r13
-64:r14
-64:r15
-64:r16
-64:r17
-64:r18
-64:r19
-64:r20
-64:r21
-64:r22
-64:r23
-64:r24
-64:r25
-64:r26
-64:r27
-64:r28
-64:r29
-64:r30
-64:r31
-64:f0
-64:f1
-64:f2
-64:f3
-64:f4
-64:f5
-64:f6
-64:f7
-64:f8
-64:f9
-64:f10
-64:f11
-64:f12
-64:f13
-64:f14
-64:f15
-64:f16
-64:f17
-64:f18
-64:f19
-64:f20
-64:f21
-64:f22
-64:f23
-64:f24
-64:f25
-64:f26
-64:f27
-64:f28
-64:f29
-64:f30
-64:f31
-64:pc
-64:msr
-32:cr
-64:lr
-64:ctr
-32:xer
-32:fpscr
-64:orig_r3
-64:trap
-128:vr0
-128:vr1
-128:vr2
-128:vr3
-128:vr4
-128:vr5
-128:vr6
-128:vr7
-128:vr8
-128:vr9
-128:vr10
-128:vr11
-128:vr12
-128:vr13
-128:vr14
-128:vr15
-128:vr16
-128:vr17
-128:vr18
-128:vr19
-128:vr20
-128:vr21
-128:vr22
-128:vr23
-128:vr24
-128:vr25
-128:vr26
-128:vr27
-128:vr28
-128:vr29
-128:vr30
-128:vr31
-32:vscr
-32:vrsave