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* remote-mips.c (mips_fetch_word): Add new parameter, `valp'.

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Change return value to int.  Store value fetched in location
	addressed by `val'.  Use function's return value as success
	or failure indicator.  Adjust all callers.
This commit is contained in:
Kevin Buettner 2010-03-08 18:22:06 +00:00
parent f72d4b774a
commit 8cfa2c71e3
1 changed files with 28 additions and 18 deletions
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46
gdb/remote-mips.c
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@ -91,7 +91,7 @@ static int mips_map_regno (struct gdbarch *, int);
static void mips_prepare_to_store (struct regcache *regcache);
static unsigned int mips_fetch_word (CORE_ADDR addr);
static int mips_fetch_word (CORE_ADDR addr, unsigned int *valp);
static int mips_store_word (CORE_ADDR addr, unsigned int value,
int *old_contents);
@ -1994,25 +1994,23 @@ mips_store_registers (struct target_ops *ops,
mips_error ("Can't write register %d: %s", regno, safe_strerror (errno));
}
/* Fetch a word from the target board. */
/* Fetch a word from the target board. Return word fetched in location
addressed by VALP. Return 0 when successful; return positive error
code when not. */
static unsigned int
mips_fetch_word (CORE_ADDR addr)
static int
mips_fetch_word (CORE_ADDR addr, unsigned int *valp)
{
unsigned int val;
int err;
val = mips_request ('d', addr, 0, &err, mips_receive_wait, NULL);
*valp = mips_request ('d', addr, 0, &err, mips_receive_wait, NULL);
if (err)
{
/* Data space failed; try instruction space. */
val = mips_request ('i', addr, 0, &err,
mips_receive_wait, NULL);
if (err)
mips_error ("Can't read address %s: %s",
paddress (target_gdbarch, addr), safe_strerror (errno));
*valp = mips_request ('i', addr, 0, &err,
mips_receive_wait, NULL);
}
return val;
return err;
}
/* Store a word to the target board. Returns errno code or zero for
@ -2078,17 +2076,25 @@ mips_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write,
/* Fill start and end extra bytes of buffer with existing data. */
if (addr != memaddr || len < 4)
{
unsigned int val;
if (mips_fetch_word (addr, &val))
return 0;
/* Need part of initial word -- fetch it. */
store_unsigned_integer (&buffer[0], 4, byte_order,
mips_fetch_word (addr));
store_unsigned_integer (&buffer[0], 4, byte_order, val);
}
if (count > 1)
{
unsigned int val;
/* Need part of last word -- fetch it. FIXME: we do this even
if we don't need it. */
store_unsigned_integer (&buffer[(count - 1) * 4], 4, byte_order,
mips_fetch_word (addr + (count - 1) * 4));
if (mips_fetch_word (addr + (count - 1) * 4, &val))
return 0;
store_unsigned_integer (&buffer[(count - 1) * 4], 4, byte_order, val);
}
/* Copy data to be written over corresponding part of buffer */
@ -2123,8 +2129,12 @@ mips_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write,
/* Read all the longwords */
for (i = 0; i < count; i++, addr += 4)
{
store_unsigned_integer (&buffer[i * 4], 4, byte_order,
mips_fetch_word (addr));
unsigned int val;
if (mips_fetch_word (addr, &val))
return 0;
store_unsigned_integer (&buffer[i * 4], 4, byte_order, val);
QUIT;
}