the moment keep the information in the target's architecture
object. Sigh.. */
+struct packet_reg
+{
+ long offset; /* Offset into G packet. */
+ long regnum; /* GDB's internal register number. */
+ LONGEST pnum; /* Remote protocol register number. */
+ /* long size in bytes; == REGISTER_RAW_SIZE (regnum); at present. */
+ /* char *name; == REGISTER_NAME (regnum); at present. */
+};
+
struct remote_state
{
+ /* Description of the remote protocol registers. */
+ long sizeof_g_packet;
+ struct packet_reg *g_packet; /* NULL terminated. */
+
/* This is the size (in chars) of the first response to the ``g''
packet. It is used as a heuristic when determining the maximum
size of memory-read and memory-write packets. A target will
int regnum;
struct remote_state *rs = xmalloc (sizeof (struct remote_state));
+ /* Start out by having the remote protocol mimic the existing
+ behavour - just copy in the description of the register cache. */
+ rs->sizeof_g_packet = REGISTER_BYTES; /* OK use. */
+
+ /* Since, for the moment, the regcache is still being direct mapped,
+ there are exactly NUM_REGS. Zero allocate a buffer adding space
+ for a sentinal. */
+ rs->g_packet = xcalloc (NUM_REGS + 1, sizeof (struct packet_reg));
+ rs->g_packet[NUM_REGS].offset = -1;
+ for (regnum = 0; regnum < NUM_REGS; regnum++)
+ {
+ rs->g_packet[regnum].pnum = regnum;
+ rs->g_packet[regnum].regnum = regnum;
+ rs->g_packet[regnum].offset = REGISTER_BYTE (regnum);
+ /* ...size = REGISTER_RAW_SIZE (regnum); */
+ /* ...name = REGISTER_NAME (regnum); */
+ }
+
/* Default maximum number of characters in a packet body. Many
remote stubs have a hardwired buffer size of 400 bytes
(c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
already a full buffer (As of 1999-12-04 that was most stubs. */
rs->remote_packet_size = 400 - 1;
- /* Should REGISTER_BYTES needs more space than the default, adjust
- the size accordingly. Remember that each byte is encoded as two
- characters. 32 is the overhead for the packet header /
- footer. NOTE: cagney/1999-10-26: I suspect that 8
+ /* Should rs->sizeof_g_packet needs more space than the
+ default, adjust the size accordingly. Remember that each byte is
+ encoded as two characters. 32 is the overhead for the packet
+ header / footer. NOTE: cagney/1999-10-26: I suspect that 8
(``$NN:G...#NN'') is a better guess, the below has been padded a
little. */
- if (REGISTER_BYTES > ((rs->remote_packet_size - 32) / 2))
- rs->remote_packet_size = (REGISTER_BYTES * 2 + 32);
+ if (rs->sizeof_g_packet > ((rs->remote_packet_size - 32) / 2))
+ rs->remote_packet_size = (rs->sizeof_g_packet * 2 + 32);
/* This one is filled in when a ``g'' packet is received. */
rs->actual_register_packet_size = 0;
static void
free_remote_state (struct gdbarch *gdbarch, void *pointer)
{
- struct remote_state *state = pointer;
- xfree (state);
+ struct remote_state *data = pointer;
+ xfree (data->g_packet);
+ xfree (data);
+}
+
+static struct packet_reg *
+packet_reg_from_regnum (struct remote_state *rs, long regnum)
+{
+ struct packet_reg *reg;
+ for (reg = rs->g_packet; reg->offset >= 0; reg++)
+ {
+ if (reg->regnum == regnum)
+ return reg;
+ }
+ return NULL;
+}
+
+static struct packet_reg *
+packet_reg_from_pnum (struct remote_state *rs, LONGEST pnum)
+{
+ struct packet_reg *reg;
+ for (reg = rs->g_packet; reg->offset >= 0; reg++)
+ {
+ if (reg->pnum == pnum)
+ return reg;
+ }
+ return NULL;
}
/* */
\f
/* User configurable variables for the number of characters in a
- memory read/write packet. MIN ((rs->remote_packet_size), g-packet-size) is the
- default. Some targets need smaller values (fifo overruns, et.al.)
- and some users need larger values (speed up transfers). The
- variables ``preferred_*'' (the user request), ``current_*'' (what
- was actually set) and ``forced_*'' (Positive - a soft limit,
- negative - a hard limit). */
+ memory read/write packet. MIN ((rs->remote_packet_size),
+ rs->sizeof_g_packet) is the default. Some targets need smaller
+ values (fifo overruns, et.al.) and some users need larger values
+ (speed up transfers). The variables ``preferred_*'' (the user
+ request), ``current_*'' (what was actually set) and ``forced_*''
+ (Positive - a soft limit, negative - a hard limit). */
struct memory_packet_config
{
case 'T': /* Status with PC, SP, FP, ... */
{
int i;
- long regno;
char* regs = (char*) alloca (MAX_REGISTER_RAW_SIZE);
/* Expedited reply, containing Signal, {regno, reg} repeat */
char *p_temp;
int fieldsize;
- /* Read the register number */
- regno = strtol ((const char *) p, &p_temp, 16);
+ /* Read the ``P'' register number. */
+ LONGEST pnum = strtol ((const char *) p, &p_temp, 16);
p1 = (unsigned char *) p_temp;
if (p1 == p) /* No register number present here */
}
else
{
+ struct packet_reg *reg = packet_reg_from_pnum (rs, pnum);
p = p1;
if (*p++ != ':')
Packet: '%s'\n",
p, buf);
- if (regno >= NUM_REGS)
- warning ("Remote sent bad register number %ld: %s\n\
+ if (reg == NULL)
+ warning ("Remote sent bad register number %s: %s\n\
Packet: '%s'\n",
- regno, p, buf);
+ phex_nz (pnum, 0), p, buf);
- fieldsize = hex2bin (p, regs, REGISTER_RAW_SIZE (regno));
+ fieldsize = hex2bin (p, regs, REGISTER_RAW_SIZE (reg->regnum));
p += 2 * fieldsize;
- if (fieldsize < REGISTER_RAW_SIZE (regno))
+ if (fieldsize < REGISTER_RAW_SIZE (reg->regnum))
warning ("Remote reply is too short: %s", buf);
- supply_register (regno, regs);
+ supply_register (reg->regnum, regs);
}
if (*p++ != ';')
case 'T': /* Status with PC, SP, FP, ... */
{
int i;
- long regno;
char* regs = (char*) alloca (MAX_REGISTER_RAW_SIZE);
/* Expedited reply, containing Signal, {regno, reg} repeat */
int fieldsize;
/* Read the register number */
- regno = strtol ((const char *) p, &p_temp, 16);
+ long pnum = strtol ((const char *) p, &p_temp, 16);
p1 = (unsigned char *) p_temp;
if (p1 == p) /* No register number present here */
}
else
{
+ struct packet_reg *reg = packet_reg_from_pnum (rs, pnum);
p = p1;
-
if (*p++ != ':')
warning ("Malformed packet(b) (missing colon): %s\n\
Packet: '%s'\n",
p, buf);
- if (regno >= NUM_REGS)
+ if (reg == NULL)
warning ("Remote sent bad register number %ld: %s\n\
Packet: '%s'\n",
- regno, p, buf);
+ pnum, p, buf);
- fieldsize = hex2bin (p, regs, REGISTER_RAW_SIZE (regno));
+ fieldsize = hex2bin (p, regs, REGISTER_RAW_SIZE (reg->regnum));
p += 2 * fieldsize;
- if (fieldsize < REGISTER_RAW_SIZE (regno))
+ if (fieldsize < REGISTER_RAW_SIZE (reg->regnum))
warning ("Remote reply is too short: %s", buf);
- supply_register (regno, regs);
+ supply_register (reg->regnum, regs);
}
if (*p++ != ';')
static int register_bytes_found;
/* Read the remote registers into the block REGS. */
-/* Currently we just read all the registers, so we don't use regno. */
+/* Currently we just read all the registers, so we don't use regnum. */
/* ARGSUSED */
static void
-remote_fetch_registers (int regno)
+remote_fetch_registers (int regnum)
{
struct remote_state *rs = get_remote_state ();
char *buf = alloca (rs->remote_packet_size);
int i;
char *p;
- char *regs = alloca (REGISTER_BYTES);
+ char *regs = alloca (rs->sizeof_g_packet);
set_thread (PIDGET (inferior_ptid), 1);
(rs->actual_register_packet_size) = strlen (buf);
/* Unimplemented registers read as all bits zero. */
- memset (regs, 0, REGISTER_BYTES);
+ memset (regs, 0, rs->sizeof_g_packet);
/* We can get out of synch in various cases. If the first character
in the buffer is not a hex character, assume that has happened
register cacheing/storage mechanism. */
p = buf;
- for (i = 0; i < REGISTER_BYTES; i++)
+ for (i = 0; i < rs->sizeof_g_packet; i++)
{
if (p[0] == 0)
break;
}
supply_them:
- for (i = 0; i < NUM_REGS; i++)
- {
- supply_register (i, ®s[REGISTER_BYTE (i)]);
- if (buf[REGISTER_BYTE (i) * 2] == 'x')
- set_register_cached (i, -1);
- }
+ {
+ struct packet_reg *g;
+ for (g = rs->g_packet; g->offset >= 0; g++)
+ {
+ supply_register (g->regnum, regs + g->offset);
+ if (buf[g->offset * 2] == 'x')
+ set_register_cached (i, -1);
+ }
+ }
}
/* Prepare to store registers. Since we may send them all (using a
{
case PACKET_DISABLE:
case PACKET_SUPPORT_UNKNOWN:
- read_register_bytes (0, (char *) NULL, REGISTER_BYTES);
+ /* NOTE: This isn't rs->sizeof_g_packet because here, we are
+ forcing the register cache to read its and not the target
+ registers. */
+ read_register_bytes (0, (char *) NULL, REGISTER_BYTES); /* OK use. */
break;
case PACKET_ENABLE:
break;
}
}
-/* Helper: Attempt to store REGNO using the P packet. Return fail IFF
+/* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
packet was not recognized. */
static int
-store_register_using_P (int regno)
+store_register_using_P (int regnum)
{
struct remote_state *rs = get_remote_state ();
+ struct packet_reg *reg = packet_reg_from_regnum (rs, regnum);
/* Try storing a single register. */
char *buf = alloca (rs->remote_packet_size);
char *regp = alloca (MAX_REGISTER_RAW_SIZE);
char *p;
int i;
- sprintf (buf, "P%x=", regno);
+ sprintf (buf, "P%s=", phex_nz (reg->pnum, 0));
p = buf + strlen (buf);
- regcache_collect (regno, regp);
- bin2hex (regp, p, REGISTER_RAW_SIZE (regno));
- remote_send (buf, (rs->remote_packet_size));
+ regcache_collect (reg->regnum, regp);
+ bin2hex (regp, p, REGISTER_RAW_SIZE (reg->regnum));
+ remote_send (buf, rs->remote_packet_size);
return buf[0] != '\0';
}
-/* Store register REGNO, or all registers if REGNO == -1, from the contents
+/* Store register REGNUM, or all registers if REGNUM == -1, from the contents
of the register cache buffer. FIXME: ignores errors. */
static void
-remote_store_registers (int regno)
+remote_store_registers (int regnum)
{
struct remote_state *rs = get_remote_state ();
char *buf;
set_thread (PIDGET (inferior_ptid), 1);
- if (regno >= 0)
+ if (regnum >= 0)
{
switch (remote_protocol_P.support)
{
case PACKET_DISABLE:
break;
case PACKET_ENABLE:
- if (store_register_using_P (regno))
+ if (store_register_using_P (regnum))
return;
else
error ("Protocol error: P packet not recognized by stub");
case PACKET_SUPPORT_UNKNOWN:
- if (store_register_using_P (regno))
+ if (store_register_using_P (regnum))
{
/* The stub recognized the 'P' packet. Remember this. */
remote_protocol_P.support = PACKET_ENABLE;
/* Extract all the registers in the regcache copying them into a
local buffer. */
{
- int i;
- regs = alloca (REGISTER_BYTES);
- memset (regs, REGISTER_BYTES, 0);
- for (i = 0; i < NUM_REGS; i++)
+ struct packet_reg *g;
+ regs = alloca (rs->sizeof_g_packet);
+ memset (regs, rs->sizeof_g_packet, 0);
+ for (g = rs->g_packet; g->offset >= 0; g++)
{
- regcache_collect (i, regs + REGISTER_BYTE (i));
+ regcache_collect (g->regnum, regs + g->offset);
}
}
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