/* Cell SPU GNU/Linux multi-architecture debugging support.
- Copyright (C) 2009 Free Software Foundation, Inc.
+ Copyright (C) 2009-2019 Free Software Foundation, Inc.
Contributed by Ulrich Weigand <uweigand@de.ibm.com>.
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 2 of the License, or
+ 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,
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, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "gdbcore.h"
#include "gdbcmd.h"
-#include "gdb_string.h"
-#include "gdb_assert.h"
#include "arch-utils.h"
-#include "observer.h"
+#include "observable.h"
#include "inferior.h"
#include "regcache.h"
#include "symfile.h"
#include "ppc-linux-tdep.h"
#include "spu-tdep.h"
-/* This module's target vector. */
-static struct target_ops spu_ops;
+/* The SPU multi-architecture support target. */
+
+static const target_info spu_multiarch_target_info = {
+ "spu",
+ N_("SPU multi-architecture support."),
+ N_("SPU multi-architecture support.")
+};
+
+struct spu_multiarch_target final : public target_ops
+{
+ const target_info &info () const override
+ { return spu_multiarch_target_info; }
+
+ strata stratum () const override { return arch_stratum; }
+
+ void mourn_inferior () override;
+
+ void fetch_registers (struct regcache *, int) override;
+ void store_registers (struct regcache *, int) override;
+
+ enum target_xfer_status xfer_partial (enum target_object object,
+ const char *annex,
+ gdb_byte *readbuf,
+ const gdb_byte *writebuf,
+ ULONGEST offset, ULONGEST len,
+ ULONGEST *xfered_len) override;
+
+ int search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
+ const gdb_byte *pattern, ULONGEST pattern_len,
+ CORE_ADDR *found_addrp) override;
+
+ int region_ok_for_hw_watchpoint (CORE_ADDR, int) override;
+
+ struct gdbarch *thread_architecture (ptid_t) override;
+};
+
+static spu_multiarch_target spu_ops;
/* Number of SPE objects loaded into the current inferior. */
static int spu_nr_solib;
static int
parse_spufs_run (ptid_t ptid, int *fd, CORE_ADDR *addr)
{
- enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
struct gdbarch_tdep *tdep;
struct regcache *regcache;
- char buf[4];
- CORE_ADDR pc;
+ gdb_byte buf[4];
ULONGEST regval;
/* If we're not on PPU, there's nothing to detect. */
- if (gdbarch_bfd_arch_info (target_gdbarch)->arch != bfd_arch_powerpc)
+ if (gdbarch_bfd_arch_info (target_gdbarch ())->arch != bfd_arch_powerpc)
+ return 0;
+
+ /* If we're called too early (e.g. after fork), we cannot
+ access the inferior yet. */
+ if (find_inferior_ptid (ptid) == NULL)
return 0;
/* Get PPU-side registers. */
- regcache = get_thread_arch_regcache (ptid, target_gdbarch);
- tdep = gdbarch_tdep (target_gdbarch);
+ regcache = get_thread_arch_regcache (ptid, target_gdbarch ());
+ tdep = gdbarch_tdep (target_gdbarch ());
/* Fetch instruction preceding current NIP. */
- if (target_read_memory (regcache_read_pc (regcache) - 4, buf, 4) != 0)
+ {
+ scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid);
+ inferior_ptid = ptid;
+ regval = target_read_memory (regcache_read_pc (regcache) - 4, buf, 4);
+ }
+ if (regval != 0)
return 0;
/* It should be a "sc" instruction. */
if (extract_unsigned_integer (buf, 4, byte_order) != INSTR_SC)
info.bfd_arch_info = bfd_lookup_arch (bfd_arch_spu, bfd_mach_spu);
info.byte_order = BFD_ENDIAN_BIG;
info.osabi = GDB_OSABI_LINUX;
- info.tdep_info = (void *) &spufs_fd;
+ info.id = &spufs_fd;
return gdbarch_find_by_info (info);
}
/* Override the to_thread_architecture routine. */
-static struct gdbarch *
-spu_thread_architecture (struct target_ops *ops, ptid_t ptid)
+struct gdbarch *
+spu_multiarch_target::thread_architecture (ptid_t ptid)
{
int spufs_fd;
CORE_ADDR spufs_addr;
if (parse_spufs_run (ptid, &spufs_fd, &spufs_addr))
return spu_gdbarch (spufs_fd);
- return target_gdbarch;
+ return beneath ()->thread_architecture (ptid);
}
/* Override the to_region_ok_for_hw_watchpoint routine. */
-static int
-spu_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
-{
- struct target_ops *ops_beneath = find_target_beneath (&spu_ops);
- while (ops_beneath && !ops_beneath->to_region_ok_for_hw_watchpoint)
- ops_beneath = find_target_beneath (ops_beneath);
+int
+spu_multiarch_target::region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
+{
/* We cannot watch SPU local store. */
if (SPUADDR_SPU (addr) != -1)
return 0;
- if (ops_beneath)
- return ops_beneath->to_region_ok_for_hw_watchpoint (addr, len);
-
- return 0;
+ return beneath ()->region_ok_for_hw_watchpoint (addr, len);
}
/* Override the to_fetch_registers routine. */
-static void
-spu_fetch_registers (struct target_ops *ops,
- struct regcache *regcache, int regno)
+
+void
+spu_multiarch_target::fetch_registers (struct regcache *regcache, int regno)
{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch *gdbarch = regcache->arch ();
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- struct target_ops *ops_beneath = find_target_beneath (ops);
int spufs_fd;
CORE_ADDR spufs_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 ());
+
/* This version applies only if we're currently in spu_run. */
if (gdbarch_bfd_arch_info (gdbarch)->arch != bfd_arch_spu)
{
- while (ops_beneath && !ops_beneath->to_fetch_registers)
- ops_beneath = find_target_beneath (ops_beneath);
-
- gdb_assert (ops_beneath);
- ops_beneath->to_fetch_registers (ops_beneath, regcache, regno);
+ beneath ()->fetch_registers (regcache, regno);
return;
}
/* The ID register holds the spufs file handle. */
if (regno == -1 || regno == SPU_ID_REGNUM)
{
- char buf[4];
+ gdb_byte buf[4];
store_unsigned_integer (buf, 4, byte_order, spufs_fd);
- regcache_raw_supply (regcache, SPU_ID_REGNUM, buf);
+ regcache->raw_supply (SPU_ID_REGNUM, buf);
}
/* The NPC register is found in PPC memory at SPUFS_ADDR. */
if (regno == -1 || regno == SPU_PC_REGNUM)
{
- char buf[4];
+ gdb_byte buf[4];
- if (target_read (ops_beneath, TARGET_OBJECT_MEMORY, NULL,
+ if (target_read (beneath (), TARGET_OBJECT_MEMORY, NULL,
buf, spufs_addr, sizeof buf) == sizeof buf)
- regcache_raw_supply (regcache, SPU_PC_REGNUM, buf);
+ 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))
{
- char buf[16 * SPU_NUM_GPRS], annex[32];
+ gdb_byte buf[16 * SPU_NUM_GPRS];
+ char annex[32];
int i;
xsnprintf (annex, sizeof annex, "%d/regs", spufs_fd);
- if (target_read (ops_beneath, TARGET_OBJECT_SPU, annex,
+ if (target_read (beneath (), TARGET_OBJECT_SPU, annex,
buf, 0, sizeof buf) == sizeof buf)
for (i = 0; i < SPU_NUM_GPRS; i++)
- regcache_raw_supply (regcache, i, buf + i*16);
+ regcache->raw_supply (i, buf + i*16);
}
}
/* Override the to_store_registers routine. */
-static void
-spu_store_registers (struct target_ops *ops,
- struct regcache *regcache, int regno)
+
+void
+spu_multiarch_target::store_registers (struct regcache *regcache, int regno)
{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
- struct target_ops *ops_beneath = find_target_beneath (ops);
+ struct gdbarch *gdbarch = regcache->arch ();
int spufs_fd;
CORE_ADDR spufs_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 ());
+
/* This version applies only if we're currently in spu_run. */
if (gdbarch_bfd_arch_info (gdbarch)->arch != bfd_arch_spu)
{
- while (ops_beneath && !ops_beneath->to_fetch_registers)
- ops_beneath = find_target_beneath (ops_beneath);
-
- gdb_assert (ops_beneath);
- ops_beneath->to_store_registers (ops_beneath, regcache, regno);
+ beneath ()->store_registers (regcache, regno);
return;
}
/* The NPC register is found in PPC memory at SPUFS_ADDR. */
if (regno == -1 || regno == SPU_PC_REGNUM)
{
- char buf[4];
- regcache_raw_collect (regcache, SPU_PC_REGNUM, buf);
+ gdb_byte buf[4];
+ regcache->raw_collect (SPU_PC_REGNUM, buf);
- target_write (ops_beneath, TARGET_OBJECT_MEMORY, NULL,
+ target_write (beneath (), TARGET_OBJECT_MEMORY, NULL,
buf, spufs_addr, sizeof buf);
}
/* The GPRs are found in the "regs" spufs file. */
if (regno == -1 || (regno >= 0 && regno < SPU_NUM_GPRS))
{
- char buf[16 * SPU_NUM_GPRS], annex[32];
+ gdb_byte buf[16 * SPU_NUM_GPRS];
+ char annex[32];
int i;
for (i = 0; i < SPU_NUM_GPRS; i++)
- regcache_raw_collect (regcache, i, buf + i*16);
+ regcache->raw_collect (i, buf + i*16);
xsnprintf (annex, sizeof annex, "%d/regs", spufs_fd);
- target_write (ops_beneath, TARGET_OBJECT_SPU, annex,
+ target_write (beneath (), TARGET_OBJECT_SPU, annex,
buf, 0, sizeof buf);
}
}
/* Override the to_xfer_partial routine. */
-static LONGEST
-spu_xfer_partial (struct target_ops *ops, enum target_object object,
- const char *annex, gdb_byte *readbuf,
- const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
+
+enum target_xfer_status
+spu_multiarch_target::xfer_partial (enum target_object object,
+ const char *annex, gdb_byte *readbuf,
+ const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
+ ULONGEST *xfered_len)
{
- struct target_ops *ops_beneath = find_target_beneath (ops);
- while (ops_beneath && !ops_beneath->to_xfer_partial)
- ops_beneath = find_target_beneath (ops_beneath);
- gdb_assert (ops_beneath);
+ struct target_ops *ops_beneath = this->beneath ();
/* Use the "mem" spufs file to access SPU local store. */
if (object == TARGET_OBJECT_MEMORY)
{
int fd = SPUADDR_SPU (offset);
CORE_ADDR addr = SPUADDR_ADDR (offset);
- char mem_annex[32];
+ char mem_annex[32], lslr_annex[32];
+ gdb_byte buf[32];
+ ULONGEST lslr;
+ enum target_xfer_status ret;
- if (fd >= 0 && addr < SPU_LS_SIZE)
+ if (fd >= 0)
{
xsnprintf (mem_annex, sizeof mem_annex, "%d/mem", fd);
- return ops_beneath->to_xfer_partial (ops_beneath, TARGET_OBJECT_SPU,
- mem_annex, readbuf, writebuf,
- addr, len);
+ ret = ops_beneath->xfer_partial (TARGET_OBJECT_SPU,
+ mem_annex, readbuf, writebuf,
+ addr, 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 (ops_beneath->xfer_partial (TARGET_OBJECT_SPU,
+ lslr_annex, buf, NULL,
+ 0, sizeof buf, xfered_len)
+ != TARGET_XFER_OK)
+ return ret;
+
+ lslr = strtoulst ((char *) buf, NULL, 16);
+ return ops_beneath->xfer_partial (TARGET_OBJECT_SPU,
+ mem_annex, readbuf, writebuf,
+ addr & lslr, len, xfered_len);
}
}
- return ops_beneath->to_xfer_partial (ops_beneath, object, annex,
- readbuf, writebuf, offset, len);
+ return ops_beneath->xfer_partial (object, annex,
+ readbuf, writebuf, offset, len, xfered_len);
}
/* Override the to_search_memory routine. */
-static int
-spu_search_memory (struct target_ops* ops,
- CORE_ADDR start_addr, ULONGEST search_space_len,
- const gdb_byte *pattern, ULONGEST pattern_len,
- CORE_ADDR *found_addrp)
+int
+spu_multiarch_target::search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
+ const gdb_byte *pattern, ULONGEST pattern_len,
+ CORE_ADDR *found_addrp)
{
- struct target_ops *ops_beneath = find_target_beneath (ops);
- while (ops_beneath && !ops_beneath->to_search_memory)
- ops_beneath = find_target_beneath (ops_beneath);
-
- /* For SPU local store, always fall back to the simple method. Likewise
- if we do not have any target-specific special implementation. */
- if (!ops_beneath || SPUADDR_SPU (start_addr) >= 0)
- return simple_search_memory (ops,
- start_addr, search_space_len,
+ /* For SPU local store, always fall back to the simple method. */
+ if (SPUADDR_SPU (start_addr) >= 0)
+ return simple_search_memory (this, start_addr, search_space_len,
pattern, pattern_len, found_addrp);
- return ops_beneath->to_search_memory (ops_beneath,
- start_addr, search_space_len,
- pattern, pattern_len, found_addrp);
+ return beneath ()->search_memory (start_addr, search_space_len,
+ pattern, pattern_len, found_addrp);
}
spu_multiarch_deactivate ();
}
-static void
-spu_mourn_inferior (struct target_ops *ops)
+void
+spu_multiarch_target::mourn_inferior ()
{
- struct target_ops *ops_beneath = find_target_beneath (ops);
- while (ops_beneath && !ops_beneath->to_mourn_inferior)
- ops_beneath = find_target_beneath (ops_beneath);
-
- gdb_assert (ops_beneath);
- ops_beneath->to_mourn_inferior (ops_beneath);
+ beneath ()->mourn_inferior ();
spu_multiarch_deactivate ();
}
-
-/* Initialize the SPU multi-architecture support target. */
-
-static void
-init_spu_ops (void)
-{
- spu_ops.to_shortname = "spu";
- spu_ops.to_longname = "SPU multi-architecture support.";
- spu_ops.to_doc = "SPU multi-architecture support.";
- spu_ops.to_mourn_inferior = spu_mourn_inferior;
- spu_ops.to_fetch_registers = spu_fetch_registers;
- spu_ops.to_store_registers = spu_store_registers;
- spu_ops.to_xfer_partial = spu_xfer_partial;
- spu_ops.to_search_memory = spu_search_memory;
- spu_ops.to_region_ok_for_hw_watchpoint = spu_region_ok_for_hw_watchpoint;
- spu_ops.to_thread_architecture = spu_thread_architecture;
- spu_ops.to_stratum = arch_stratum;
- spu_ops.to_magic = OPS_MAGIC;
-}
-
void
_initialize_spu_multiarch (void)
{
- /* Install ourselves on the target stack. */
- init_spu_ops ();
- add_target (&spu_ops);
-
/* Install observers to watch for SPU objects. */
- observer_attach_inferior_created (spu_multiarch_inferior_created);
- observer_attach_solib_loaded (spu_multiarch_solib_loaded);
- observer_attach_solib_unloaded (spu_multiarch_solib_unloaded);
+ gdb::observers::inferior_created.attach (spu_multiarch_inferior_created);
+ gdb::observers::solib_loaded.attach (spu_multiarch_solib_loaded);
+ gdb::observers::solib_unloaded.attach (spu_multiarch_solib_unloaded);
}
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