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-rw-r--r--gdb/ChangeLog13
-rw-r--r--gdb/gdbserver/ChangeLog5
-rw-r--r--gdb/gdbserver/spu-low.c38
-rw-r--r--gdb/spu-linux-nat.c22
-rw-r--r--gdb/spu-multiarch.c27
-rw-r--r--gdb/spu-tdep.c27
-rw-r--r--gdb/spu-tdep.h61
-rw-r--r--gdb/testsuite/ChangeLog5
-rw-r--r--gdb/testsuite/gdb.arch/spu-ls.c31
-rw-r--r--gdb/testsuite/gdb.arch/spu-ls.exp54
10 files changed, 251 insertions, 32 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index b8cd0f8..48e6250 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,16 @@
+2010-06-19 Ulrich Weigand <uweigand@de.ibm.com>
+
+ * spu-multiarch.c (spu_xfer_partial): Wrap around local store
+ limit on local store memory accesses.
+ * spu-linux-nat.c (spu_xfer_partial): Likewise.
+ * spu-tdep.c (spu_lslr): Remove.
+ (spu_pointer_to_address): Do not truncate addresses.
+ (spu_integer_to_address): Likewise.
+ (spu_overlay_new_objfile): Use SPU_OVERLAY_LMA.
+ * spu-tdep.h: Add comments.
+ (SPUADDR_SPU): Respect SPU_OVERLAY_LMA bit.
+ (SPU_OVERLAY_LMA): Define.
+
2010-06-18 Stan Shebs <stan@codesourcery.com>
* osdata.c (get_osdata): Warn separately if target does not report
diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog
index 6b9f493..06c63430 100644
--- a/gdb/gdbserver/ChangeLog
+++ b/gdb/gdbserver/ChangeLog
@@ -1,3 +1,8 @@
+2010-06-19 Ulrich Weigand <uweigand@de.ibm.com>
+
+ * spu-low.c (spu_read_memory): Wrap around local store limit.
+ (spu_write_memory): Likewise.
+
2010-06-15 Pedro Alves <pedro@codesourcery.com>
* linux-x86-low.c (amd64_emit_const, amd64_emit_void_call_2)
diff --git a/gdb/gdbserver/spu-low.c b/gdb/gdbserver/spu-low.c
index d9ac815..2188d64 100644
--- a/gdb/gdbserver/spu-low.c
+++ b/gdb/gdbserver/spu-low.c
@@ -561,7 +561,8 @@ spu_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
{
int fd, ret;
CORE_ADDR addr;
- char annex[32];
+ char annex[32], lslr_annex[32], buf[32];
+ CORE_ADDR lslr;
/* We must be stopped on a spu_run system call. */
if (!parse_spufs_run (&fd, &addr))
@@ -570,6 +571,22 @@ spu_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
/* Use the "mem" spufs file to access SPU local store. */
sprintf (annex, "%d/mem", fd);
ret = spu_proc_xfer_spu (annex, myaddr, NULL, memaddr, len);
+ if (ret > 0)
+ return ret == len ? 0 : EIO;
+
+ /* 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. */
+ sprintf (lslr_annex, "%d/lslr", fd);
+ memset (buf, 0, sizeof buf);
+ if (spu_proc_xfer_spu (lslr_annex, (unsigned char *)buf, NULL,
+ 0, sizeof buf) <= 0)
+ return ret;
+
+ lslr = strtoul (buf, NULL, 16);
+ ret = spu_proc_xfer_spu (annex, myaddr, NULL, memaddr & lslr, len);
+
return ret == len ? 0 : EIO;
}
@@ -582,7 +599,8 @@ spu_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len)
{
int fd, ret;
CORE_ADDR addr;
- char annex[32];
+ char annex[32], lslr_annex[32], buf[32];
+ CORE_ADDR lslr;
/* We must be stopped on a spu_run system call. */
if (!parse_spufs_run (&fd, &addr))
@@ -591,6 +609,22 @@ spu_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len)
/* Use the "mem" spufs file to access SPU local store. */
sprintf (annex, "%d/mem", fd);
ret = spu_proc_xfer_spu (annex, NULL, myaddr, memaddr, len);
+ if (ret > 0)
+ return ret == len ? 0 : EIO;
+
+ /* 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. */
+ sprintf (lslr_annex, "%d/lslr", fd);
+ memset (buf, 0, sizeof buf);
+ if (spu_proc_xfer_spu (lslr_annex, (unsigned char *)buf, NULL,
+ 0, sizeof buf) <= 0)
+ return ret;
+
+ lslr = strtoul (buf, NULL, 16);
+ ret = spu_proc_xfer_spu (annex, NULL, myaddr, memaddr & lslr, len);
+
return ret == len ? 0 : EIO;
}
diff --git a/gdb/spu-linux-nat.c b/gdb/spu-linux-nat.c
index 7c9e2c5..5adfe4b 100644
--- a/gdb/spu-linux-nat.c
+++ b/gdb/spu-linux-nat.c
@@ -562,7 +562,10 @@ spu_xfer_partial (struct target_ops *ops,
{
int fd;
ULONGEST addr;
- char mem_annex[32];
+ char mem_annex[32], lslr_annex[32];
+ gdb_byte buf[32];
+ ULONGEST lslr;
+ LONGEST ret;
/* We must be stopped on a spu_run system call. */
if (!parse_spufs_run (&fd, &addr))
@@ -570,7 +573,22 @@ spu_xfer_partial (struct target_ops *ops,
/* Use the "mem" spufs file to access SPU local store. */
xsnprintf (mem_annex, sizeof mem_annex, "%d/mem", fd);
- return spu_proc_xfer_spu (mem_annex, readbuf, writebuf, offset, len);
+ ret = spu_proc_xfer_spu (mem_annex, readbuf, writebuf, offset, len);
+ if (ret > 0)
+ 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) <= 0)
+ return ret;
+
+ lslr = strtoulst (buf, NULL, 16);
+ return spu_proc_xfer_spu (mem_annex, readbuf, writebuf,
+ offset & lslr, len);
}
return -1;
diff --git a/gdb/spu-multiarch.c b/gdb/spu-multiarch.c
index d072032..450aa42 100644
--- a/gdb/spu-multiarch.c
+++ b/gdb/spu-multiarch.c
@@ -259,14 +259,35 @@ spu_xfer_partial (struct target_ops *ops, enum target_object object,
{
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;
+ LONGEST ret;
- if (fd >= 0 && addr < SPU_LS_SIZE)
+ if (fd >= 0)
{
xsnprintf (mem_annex, sizeof mem_annex, "%d/mem", fd);
+ ret = ops_beneath->to_xfer_partial (ops_beneath, TARGET_OBJECT_SPU,
+ mem_annex, readbuf, writebuf,
+ addr, len);
+ if (ret > 0)
+ 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->to_xfer_partial (ops_beneath, TARGET_OBJECT_SPU,
+ lslr_annex, buf, NULL,
+ 0, sizeof buf) <= 0)
+ return ret;
+
+ lslr = strtoulst (buf, NULL, 16);
return ops_beneath->to_xfer_partial (ops_beneath, TARGET_OBJECT_SPU,
mem_annex, readbuf, writebuf,
- addr, len);
+ addr & lslr, len);
}
}
diff --git a/gdb/spu-tdep.c b/gdb/spu-tdep.c
index ae64841..072ae8c 100644
--- a/gdb/spu-tdep.c
+++ b/gdb/spu-tdep.c
@@ -364,23 +364,6 @@ spu_gdbarch_id (struct gdbarch *gdbarch)
return id;
}
-static ULONGEST
-spu_lslr (int id)
-{
- gdb_byte buf[32];
- char annex[32];
-
- if (id == -1)
- return SPU_LS_SIZE - 1;
-
- xsnprintf (annex, sizeof annex, "%d/lslr", id);
- memset (buf, 0, sizeof buf);
- target_read (&current_target, TARGET_OBJECT_SPU, annex,
- buf, 0, sizeof buf);
-
- return strtoulst (buf, NULL, 16);
-}
-
static int
spu_address_class_type_flags (int byte_size, int dwarf2_addr_class)
{
@@ -426,7 +409,6 @@ spu_pointer_to_address (struct gdbarch *gdbarch,
struct type *type, const gdb_byte *buf)
{
int id = spu_gdbarch_id (gdbarch);
- ULONGEST lslr = spu_lslr (id);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
ULONGEST addr
= extract_unsigned_integer (buf, TYPE_LENGTH (type), byte_order);
@@ -435,7 +417,7 @@ spu_pointer_to_address (struct gdbarch *gdbarch,
if (TYPE_ADDRESS_CLASS_1 (type))
return addr;
- return addr? SPUADDR (id, addr & lslr) : 0;
+ return addr? SPUADDR (id, addr) : 0;
}
static CORE_ADDR
@@ -443,10 +425,9 @@ spu_integer_to_address (struct gdbarch *gdbarch,
struct type *type, const gdb_byte *buf)
{
int id = spu_gdbarch_id (gdbarch);
- ULONGEST lslr = spu_lslr (id);
ULONGEST addr = unpack_long (type, buf);
- return SPUADDR (id, addr & lslr);
+ return SPUADDR (id, addr);
}
@@ -1777,7 +1758,7 @@ spu_overlay_update (struct obj_section *osect)
/* Whenever a new objfile is loaded, read the target's _ovly_table.
If there is one, go through all sections and make sure for non-
overlay sections LMA equals VMA, while for overlay sections LMA
- is larger than local store size. */
+ is larger than SPU_OVERLAY_LMA. */
static void
spu_overlay_new_objfile (struct objfile *objfile)
{
@@ -1807,7 +1788,7 @@ spu_overlay_new_objfile (struct objfile *objfile)
if (ovly_table[ndx].mapped_ptr == 0)
bfd_section_lma (obfd, bsect) = bfd_section_vma (obfd, bsect);
else
- bfd_section_lma (obfd, bsect) = bsect->filepos + SPU_LS_SIZE;
+ bfd_section_lma (obfd, bsect) = SPU_OVERLAY_LMA + bsect->filepos;
}
}
diff --git a/gdb/spu-tdep.h b/gdb/spu-tdep.h
index 9e70db9..4b83f74 100644
--- a/gdb/spu-tdep.h
+++ b/gdb/spu-tdep.h
@@ -50,14 +50,71 @@ enum spu_regnum
/* Local store. */
#define SPU_LS_SIZE 0x40000
-/* Address conversions. */
+/* Address conversions.
+
+ In a combined PPU/SPU debugging session, we have to consider multiple
+ address spaces: the PPU 32- or 64-bit address space, and the 32-bit
+ local store address space for each SPU context. As it is currently
+ not yet possible to use the program_space / address_space mechanism
+ to represent this, we encode all those addresses into one single
+ 64-bit address for the whole process. For SPU programs using overlays,
+ this address space must also include separate ranges reserved for the
+ LMA of overlay sections.
+
+
+ The following combinations are supported for combined debugging:
+
+ PPU address (this relies on the fact that PPC 64-bit user space
+ addresses can never have the highest-most bit set):
+
+ +-+---------------------------------+
+ |0| ADDR [63] |
+ +-+---------------------------------+
+
+ SPU address for SPU context with id SPU (this assumes that SPU
+ IDs, which are file descriptors, are never larger than 2^30):
+
+ +-+-+--------------+----------------+
+ |1|0| SPU [30] | ADDR [32] |
+ +-+-+--------------+----------------+
+
+ SPU overlay section LMA for SPU context with id SPU:
+
+ +-+-+--------------+----------------+
+ |1|1| SPU [30] | ADDR [32] |
+ +-+-+--------------+----------------+
+
+
+ In SPU stand-alone debugging mode (using spu-linux-nat.c),
+ the following combinations are supported:
+
+ SPU address:
+
+ +-+-+--------------+----------------+
+ |0|0| 0 | ADDR [32] |
+ +-+-+--------------+----------------+
+
+ SPU overlay section LMA:
+
+ +-+-+--------------+----------------+
+ |0|1| 0 | ADDR [32] |
+ +-+-+--------------+----------------+
+
+
+ The following macros allow manipulation of addresses in the
+ above formats. */
+
#define SPUADDR(spu, addr) \
((spu) != -1? (ULONGEST)1 << 63 | (ULONGEST)(spu) << 32 | (addr) : (addr))
+
#define SPUADDR_SPU(addr) \
(((addr) & (ULONGEST)1 << 63) \
- ? (int) ((ULONGEST)(addr) >> 32 & 0x7fffffff) \
+ ? (int) ((ULONGEST)(addr) >> 32 & 0x3fffffff) \
: -1)
+
#define SPUADDR_ADDR(addr) \
(((addr) & (ULONGEST)1 << 63)? (ULONGEST)(addr) & 0xffffffff : (addr))
+#define SPU_OVERLAY_LMA ((ULONGEST)1 << 62)
+
#endif
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 3b61976..ca54ab7 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2010-06-19 Ulrich Weigand <Ulrich.Weigand@de.ibm.com>
+
+ * gdb.arch/spu-ls.exp: New file.
+ * gdb.arch/spu-ls.c: Likewise.
+
2010-06-18 Stan Shebs <stan@codesourcery.com>
* gdb.threads/thread-specific.exp: Add tests of $_thread.
diff --git a/gdb/testsuite/gdb.arch/spu-ls.c b/gdb/testsuite/gdb.arch/spu-ls.c
new file mode 100644
index 0000000..4cb651f
--- /dev/null
+++ b/gdb/testsuite/gdb.arch/spu-ls.c
@@ -0,0 +1,31 @@
+/* Copyright 2010 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 Ulrich Weigand <uweigand@de.ibm.com>.
+ Tests for SPU local-store access. */
+
+char *ptr = (char *)0x12345678;
+
+char array[256];
+
+int
+main (unsigned long long speid, unsigned long long argp,
+ unsigned long long envp)
+{
+ return 0;
+}
+
diff --git a/gdb/testsuite/gdb.arch/spu-ls.exp b/gdb/testsuite/gdb.arch/spu-ls.exp
new file mode 100644
index 0000000..967d057
--- /dev/null
+++ b/gdb/testsuite/gdb.arch/spu-ls.exp
@@ -0,0 +1,54 @@
+# Copyright 2010 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 Ulrich Weigand <uweigand@de.ibm.com>.
+# Tests for SPU local-store access.
+
+if { ![istarget "spu-*-elf"] } then {
+ verbose "Skipping SPU-only testcase"
+ return
+}
+
+set testfile "spu-ls"
+set srcfile ${testfile}.c
+set binfile ${objdir}/${subdir}/${testfile}
+set sources ${srcdir}/${subdir}/${srcfile}
+
+if { [gdb_compile $sources ${binfile} executable { debug }] != "" } {
+ return -1
+}
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+gdb_load ${binfile}
+
+if ![runto_main] then {
+ fail "Can't run to main"
+ return 0
+}
+
+gdb_test "print ptr" " = 0x12345678 \".*\"" "print ptr"
+gdb_test_no_output "set ptr = array + \$lslr + 1" "set ptr = array + \$lslr + 1"
+gdb_test_no_output "set array\[0\] = 1" "set array\[0\] = 1"
+gdb_test "print *ptr" " = 1 '\\\\001'" "print *ptr"
+gdb_test_no_output "set *ptr = 2" "set *ptr = 2"
+gdb_test "print array\[0\]" " = 2 '\\\\002'" "print array\[0\]"
+
+gdb_exit
+
+return 0
generated by cgit v1.1 at 2024-11-27 03:00:27 +0000