some SPE-specific registers.
GDB itself continues to claim the general-purpose registers are 32
- bits long; the full 64-bit registers are called 'ev0' -- 'ev31'.
- The ev registers are raw registers, and the GPR's are pseudo-
- registers mapped onto their lower halves. This means that reading
- and writing ev registers involves a mix of regset-at-once
- PTRACE_{GET,SET}EVRREGS calls and register-at-a-time
- PTRACE_{PEEK,POKE}USR calls.
+ bits long. It has unnamed raw registers that hold the upper halves
+ of the gprs, and the the full 64-bit SIMD views of the registers,
+ 'ev0' -- 'ev31', are pseudo-registers that splice the top and
+ bottom halves together.
This is the structure filled in by PTRACE_GETEVRREGS and written to
the inferior's registers by PTRACE_SETEVRREGS. */
memset (evrregset, 0, sizeof (*evrregset));
}
-/* Assuming TID refers to an SPE process, store the full 64-bit value
- of TID's ev register EV_REGNUM in DEST, getting the high bits from
- EVRREGS and the low bits from the kernel via ptrace. */
-static void
-read_spliced_spe_reg (int tid, int ev_regnum,
- struct gdb_evrregset_t *evrregs,
- char *dest)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
-
- /* Make sure we're trying to read an EV register; that's all we
- handle. */
- gdb_assert (tdep->ppc_ev0_regnum <= ev_regnum
- && ev_regnum <= tdep->ppc_ev31_regnum);
-
- /* Make sure the sizes for the splicing add up. */
- gdb_assert (sizeof (evrregs->evr[0]) + sizeof (PTRACE_XFER_TYPE)
- == register_size (current_gdbarch, ev_regnum));
-
- {
- /* The index of ev_regnum in evrregs->evr[]. */
- int ev_index = ev_regnum - tdep->ppc_ev0_regnum;
-
- /* The number of the corresponding general-purpose register, which
- holds the lower 32 bits of the EV register. */
- int gpr_regnum = tdep->ppc_gp0_regnum + ev_index;
-
- /* The offset of gpr_regnum in the process's uarea. */
- CORE_ADDR gpr_uoffset = ppc_register_u_addr (gpr_regnum);
-
- /* The low word of the EV register's value. */
- PTRACE_XFER_TYPE low_word;
-
- /* The PTRACE_PEEKUSR / PT_READ_U ptrace requests need to be able
- to return arbitrary register values, so they can't return -1 to
- indicate an error. So we clear errno, and then check it after
- the call. */
- errno = 0;
- low_word = ptrace (PT_READ_U, tid, (PTRACE_ARG3_TYPE) gpr_uoffset, 0);
-
- if (errno != 0)
- {
- char message[128];
- sprintf (message, "reading register %s (#%d)",
- REGISTER_NAME (ev_regnum), ev_regnum);
- perror_with_name (message);
- }
-
- if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
- {
- memcpy (dest, &evrregs->evr[ev_index],
- sizeof (evrregs->evr[ev_index]));
- * (PTRACE_XFER_TYPE *) (dest + sizeof (evrregs->evr[ev_index]))
- = low_word;
- }
- else if (TARGET_BYTE_ORDER == BFD_ENDIAN_LITTLE)
- {
- * (PTRACE_XFER_TYPE *) dest = low_word;
- memcpy (dest + sizeof (PTRACE_XFER_TYPE),
- &evrregs->evr[ev_index], sizeof (evrregs->evr[ev_index]));
- }
- else
- gdb_assert (0);
- }
-}
-
-
-/* On SPE machines, supply the full value of the SPE register REGNO
- from TID. This handles ev0 -- ev31 and acc, which are 64 bits
- long, and spefscr, which is 32 bits long. */
+/* Supply values from TID for SPE-specific raw registers: the upper
+ halves of the GPRs, the accumulator, and the spefscr. REGNO must
+ be the number of an upper half register, acc, spefscr, or -1 to
+ supply the values of all registers. */
static void
fetch_spe_register (int tid, int regno)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
struct gdb_evrregset_t evrregs;
+ gdb_assert (sizeof (evrregs.evr[0])
+ == register_size (current_gdbarch, tdep->ppc_ev0_upper_regnum));
+ gdb_assert (sizeof (evrregs.acc)
+ == register_size (current_gdbarch, tdep->ppc_acc_regnum));
+ gdb_assert (sizeof (evrregs.spefscr)
+ == register_size (current_gdbarch, tdep->ppc_spefscr_regnum));
+
get_spe_registers (tid, &evrregs);
- if (tdep->ppc_ev0_regnum <= regno
- && regno <= tdep->ppc_ev31_regnum)
- {
- char buf[MAX_REGISTER_SIZE];
- read_spliced_spe_reg (tid, regno, &evrregs, buf);
- regcache_raw_supply (current_regcache, regno, buf);
- }
- else if (regno == tdep->ppc_acc_regnum)
- {
- gdb_assert (sizeof (evrregs.acc)
- == register_size (current_gdbarch, regno));
- regcache_raw_supply (current_regcache, regno, &evrregs.acc);
- }
- else if (regno == tdep->ppc_spefscr_regnum)
+ if (regno == -1)
{
- gdb_assert (sizeof (evrregs.spefscr)
- == register_size (current_gdbarch, regno));
- regcache_raw_supply (current_regcache, regno, &evrregs.spefscr);
+ int i;
+
+ for (i = 0; i < ppc_num_gprs; i++)
+ regcache_raw_supply (current_regcache, tdep->ppc_ev0_upper_regnum + i,
+ &evrregs.evr[i]);
}
- else
- gdb_assert (0);
+ else if (tdep->ppc_ev0_upper_regnum <= regno
+ && regno < tdep->ppc_ev0_upper_regnum + ppc_num_gprs)
+ regcache_raw_supply (current_regcache, regno,
+ &evrregs.evr[regno - tdep->ppc_ev0_upper_regnum]);
+
+ if (regno == -1
+ || regno == tdep->ppc_acc_regnum)
+ regcache_raw_supply (current_regcache, tdep->ppc_acc_regnum, &evrregs.acc);
+
+ if (regno == -1
+ || regno == tdep->ppc_spefscr_regnum)
+ regcache_raw_supply (current_regcache, tdep->ppc_spefscr_regnum,
+ &evrregs.spefscr);
}
static void
unsigned int offset; /* Offset of registers within the u area. */
char buf[MAX_REGISTER_SIZE];
- /* Sanity check: this function should only be called to fetch raw
- registers' values, never pseudoregisters' values. */
- if (tdep->ppc_gp0_regnum <= regno
- && regno < tdep->ppc_gp0_regnum + ppc_num_gprs)
- gdb_assert (! tdep->ppc_gprs_pseudo_p);
-
if (altivec_register_p (regno))
{
/* If this is the first time through, or if it is not the first
regcache_raw_supply (current_regcache, regno, buf + padding);
}
else
- gdb_assert (0);
+ internal_error (__FILE__, __LINE__,
+ "fetch_register: unexpected byte order: %d",
+ gdbarch_byte_order (current_gdbarch));
}
static void
supply_vrregset (®s);
}
-/* On SPE machines, fetch the full 64 bits of all the general-purpose
- registers, as well as the SPE-specific registers 'acc' and
- 'spefscr'. */
-static void
-fetch_spe_registers (int tid)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
- struct gdb_evrregset_t evrregs;
- int i;
-
- get_spe_registers (tid, &evrregs);
-
- /* Splice and supply each of the EV registers. */
- for (i = 0; i < ppc_num_gprs; i++)
- {
- char buf[MAX_REGISTER_SIZE];
-
- read_spliced_spe_reg (tid, tdep->ppc_ev0_regnum + i, &evrregs, buf);
- regcache_raw_supply (current_regcache, tdep->ppc_ev0_regnum + i, buf);
- }
-
- /* Supply the SPE-specific registers. */
- regcache_raw_supply (current_regcache, tdep->ppc_acc_regnum, &evrregs.acc);
- regcache_raw_supply (current_regcache, tdep->ppc_spefscr_regnum,
- &evrregs.spefscr);
-}
-
static void
fetch_ppc_registers (int tid)
{
int i;
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
- if (! tdep->ppc_gprs_pseudo_p)
- for (i = 0; i < ppc_num_gprs; i++)
- fetch_register (tid, tdep->ppc_gp0_regnum + i);
+ for (i = 0; i < ppc_num_gprs; i++)
+ fetch_register (tid, tdep->ppc_gp0_regnum + i);
if (tdep->ppc_fp0_regnum >= 0)
for (i = 0; i < ppc_num_fprs; i++)
fetch_register (tid, tdep->ppc_fp0_regnum + i);
if (have_ptrace_getvrregs)
if (tdep->ppc_vr0_regnum != -1 && tdep->ppc_vrsave_regnum != -1)
fetch_altivec_registers (tid);
- if (tdep->ppc_ev0_regnum >= 0)
- fetch_spe_registers (tid);
+ if (tdep->ppc_ev0_upper_regnum >= 0)
+ fetch_spe_register (tid, -1);
}
/* Fetch registers from the child process. Fetch all registers if
}
}
-/* Store the bytes at SRC as the contents of TID's EV register EV_REGNUM.
- Write the less significant word to TID using ptrace, and copy the
- more significant word to the appropriate slot in EVRREGS. */
-static void
-write_spliced_spe_reg (int tid, int ev_regnum,
- struct gdb_evrregset_t *evrregs,
- char *src)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
-
- /* Make sure we're trying to write an EV register; that's all we
- handle. */
- gdb_assert (tdep->ppc_ev0_regnum <= ev_regnum
- && ev_regnum <= tdep->ppc_ev31_regnum);
-
- /* Make sure the sizes for the splicing add up. */
- gdb_assert (sizeof (evrregs->evr[0]) + sizeof (PTRACE_XFER_TYPE)
- == register_size (current_gdbarch, ev_regnum));
-
- {
- int ev_index = ev_regnum - tdep->ppc_ev0_regnum;
-
- /* The number of the corresponding general-purpose register, which
- holds the lower 32 bits of the EV register. */
- int gpr_regnum = tdep->ppc_gp0_regnum + ev_index;
-
- /* The offset of gpr_regnum in the process's uarea. */
- CORE_ADDR gpr_uoffset = ppc_register_u_addr (gpr_regnum);
-
- /* The PTRACE_POKEUSR / PT_WRITE_U ptrace requests need to be able
- to return arbitrary register values, so they can't return -1 to
- indicate an error. So we clear errno, and check it again
- afterwards. */
- errno = 0;
-
- if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
- {
- memcpy (&evrregs->evr[ev_index], src, sizeof (evrregs->evr[ev_index]));
- ptrace (PT_WRITE_U, tid, (PTRACE_ARG3_TYPE) gpr_uoffset,
- * (PTRACE_XFER_TYPE *) (src + sizeof (evrregs->evr[0])));
- }
- else if (TARGET_BYTE_ORDER == BFD_ENDIAN_LITTLE)
- {
- ptrace (PT_WRITE_U, tid, (PTRACE_ARG3_TYPE) gpr_uoffset,
- * (PTRACE_XFER_TYPE *) src);
- memcpy (&evrregs->evr[ev_index], src + sizeof (PTRACE_XFER_TYPE),
- sizeof (evrregs->evr[ev_index]));
- }
- else
- gdb_assert (0);
-
- if (errno != 0)
- {
- char message[128];
- sprintf (message, "writing register %s (#%d)",
- REGISTER_NAME (ev_regnum), ev_regnum);
- perror_with_name (message);
- }
- }
-}
-
-/* Write GDB's value for the SPE register REGNO to TID. */
+/* Write GDB's value for the SPE-specific raw register REGNO to TID.
+ If REGNO is -1, write the values of all the SPE-specific
+ registers. */
static void
store_spe_register (int tid, int regno)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
struct gdb_evrregset_t evrregs;
- /* We can only read and write the entire EVR register set at a time,
- so to write just a single register, we do a read-modify-write
- maneuver. */
- get_spe_registers (tid, &evrregs);
+ gdb_assert (sizeof (evrregs.evr[0])
+ == register_size (current_gdbarch, tdep->ppc_ev0_upper_regnum));
+ gdb_assert (sizeof (evrregs.acc)
+ == register_size (current_gdbarch, tdep->ppc_acc_regnum));
+ gdb_assert (sizeof (evrregs.spefscr)
+ == register_size (current_gdbarch, tdep->ppc_spefscr_regnum));
- if (tdep->ppc_ev0_regnum >= 0
- && tdep->ppc_ev0_regnum <= regno && regno <= tdep->ppc_ev31_regnum)
- {
- char buf[MAX_REGISTER_SIZE];
- regcache_raw_collect (current_regcache, regno, buf);
- write_spliced_spe_reg (tid, regno, &evrregs, buf);
- }
- else if (tdep->ppc_acc_regnum >= 0
- && regno == tdep->ppc_acc_regnum)
- {
- gdb_assert (sizeof (evrregs.acc)
- == register_size (current_gdbarch, regno));
- regcache_raw_collect (current_regcache, regno, &evrregs.acc);
- }
- else if (tdep->ppc_spefscr_regnum >= 0
- && regno == tdep->ppc_spefscr_regnum)
+ if (regno == -1)
+ /* Since we're going to write out every register, the code below
+ should store to every field of evrregs; if that doesn't happen,
+ make it obvious by initializing it with suspicious values. */
+ memset (&evrregs, 42, sizeof (evrregs));
+ else
+ /* We can only read and write the entire EVR register set at a
+ time, so to write just a single register, we do a
+ read-modify-write maneuver. */
+ get_spe_registers (tid, &evrregs);
+
+ if (regno == -1)
{
- gdb_assert (sizeof (evrregs.spefscr)
- == register_size (current_gdbarch, regno));
- regcache_raw_collect (current_regcache, regno, &evrregs.spefscr);
+ int i;
+
+ for (i = 0; i < ppc_num_gprs; i++)
+ regcache_raw_collect (current_regcache,
+ tdep->ppc_ev0_upper_regnum + i,
+ &evrregs.evr[i]);
}
- else
- gdb_assert (0);
+ else if (tdep->ppc_ev0_upper_regnum <= regno
+ && regno < tdep->ppc_ev0_upper_regnum + ppc_num_gprs)
+ regcache_raw_collect (current_regcache, regno,
+ &evrregs.evr[regno - tdep->ppc_ev0_upper_regnum]);
+
+ if (regno == -1
+ || regno == tdep->ppc_acc_regnum)
+ regcache_raw_collect (current_regcache,
+ tdep->ppc_acc_regnum,
+ &evrregs.acc);
+
+ if (regno == -1
+ || regno == tdep->ppc_spefscr_regnum)
+ regcache_raw_collect (current_regcache,
+ tdep->ppc_spefscr_regnum,
+ &evrregs.spefscr);
/* Write back the modified register set. */
set_spe_registers (tid, &evrregs);
size_t bytes_to_transfer;
char buf[MAX_REGISTER_SIZE];
- /* Sanity check: this function should only be called to store raw
- registers' values, never pseudoregisters' values. */
- if (tdep->ppc_gp0_regnum <= regno
- && regno < tdep->ppc_gp0_regnum + ppc_num_gprs)
- gdb_assert (! tdep->ppc_gprs_pseudo_p);
-
if (altivec_register_p (regno))
{
store_altivec_register (tid, regno);
perror_with_name ("Couldn't write AltiVec registers");
}
-static void
-store_spe_registers (int tid)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
- struct gdb_evrregset_t evrregs;
- int i;
-
- /* The code below should store to every field of evrregs; if that
- doesn't happen, make it obvious by initializing it with
- suspicious values. */
- memset (&evrregs, 42, sizeof (evrregs));
-
- for (i = 0; i < ppc_num_gprs; i++)
- {
- char buf[MAX_REGISTER_SIZE];
-
- regcache_raw_collect (current_regcache, tdep->ppc_ev0_regnum + i, buf);
- write_spliced_spe_reg (tid, tdep->ppc_ev0_regnum + i, &evrregs, buf);
- }
-
- gdb_assert (sizeof (evrregs.acc)
- == register_size (current_gdbarch, tdep->ppc_acc_regnum));
- regcache_raw_collect (current_regcache, tdep->ppc_acc_regnum, &evrregs.acc);
- gdb_assert (sizeof (evrregs.spefscr)
- == register_size (current_gdbarch, tdep->ppc_spefscr_regnum));
- regcache_raw_collect (current_regcache, tdep->ppc_acc_regnum, &evrregs.spefscr);
-
- set_spe_registers (tid, &evrregs);
-}
-
static void
store_ppc_registers (int tid)
{
int i;
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
- if (! tdep->ppc_gprs_pseudo_p)
- for (i = 0; i < ppc_num_gprs; i++)
- store_register (tid, tdep->ppc_gp0_regnum + i);
+ for (i = 0; i < ppc_num_gprs; i++)
+ store_register (tid, tdep->ppc_gp0_regnum + i);
if (tdep->ppc_fp0_regnum >= 0)
for (i = 0; i < ppc_num_fprs; i++)
store_register (tid, tdep->ppc_fp0_regnum + i);
if (have_ptrace_getvrregs)
if (tdep->ppc_vr0_regnum != -1 && tdep->ppc_vrsave_regnum != -1)
store_altivec_registers (tid);
- if (tdep->ppc_ev0_regnum >= 0)
- store_spe_registers (tid);
+ if (tdep->ppc_ev0_upper_regnum >= 0)
+ store_spe_register (tid, -1);
}
void
projects / deliverable / binutils-gdb.git / blobdiff