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2002-08-20 Andrew Cagney <ac131313@redhat.com>

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* mips-tdep.c (mips_gdbarch_init): Update.
(mips_o32_extract_return_value): Rewrite.
(mips_o32_store_return_value): Rewrite.
(mips_o32_xfer_return_value): New function.
(mips_xfer_register): Tweak debug print message.  Allow for
buf_offset when dumping the value transfered.
This commit is contained in:
Andrew Cagney 2002-08-20 16:11:49 +00:00
parent dfc3d9b245
commit cb1d2653f9
2 changed files with 162 additions and 50 deletions
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9
gdb/ChangeLog
View File

@ -1,3 +1,12 @@
2002-08-20 Andrew Cagney <ac131313@redhat.com>
* mips-tdep.c (mips_gdbarch_init): Update.
(mips_o32_extract_return_value): Rewrite.
(mips_o32_store_return_value): Rewrite.
(mips_o32_xfer_return_value): New function.
(mips_xfer_register): Tweak debug print message. Allow for
buf_offset when dumping the value transfered.
2002-08-20 Andrew Cagney <ac131313@redhat.com>
* config/mips/tm-nbsd.h (MIPS_DEFAULT_ABI): Delete.

203
gdb/mips-tdep.c
View File

@ -185,6 +185,8 @@ mips_xfer_register (struct regcache *regcache, int reg_num, int length,
{
bfd_byte *reg = alloca (MAX_REGISTER_RAW_SIZE);
int reg_offset = 0;
/* Need to transfer the left or right part of the register, based on
the targets byte order. */
switch (endian)
{
case BFD_ENDIAN_BIG:
@ -200,14 +202,15 @@ mips_xfer_register (struct regcache *regcache, int reg_num, int length,
internal_error (__FILE__, __LINE__, "bad switch");
}
if (mips_debug)
fprintf_unfiltered (gdb_stderr, "xfer $%d[%d..%d] ",
reg_num, reg_offset, reg_offset + length);
fprintf_unfiltered (gdb_stderr,
"xfer $%d, reg offset %d, buf offset %d, length %d, ",
reg_num, reg_offset, buf_offset, length);
if (mips_debug && out != NULL)
{
int i;
fprintf_unfiltered (gdb_stdlog, "out: ");
fprintf_unfiltered (gdb_stdlog, "out ");
for (i = 0; i < length; i++)
fprintf_unfiltered (gdb_stdlog, "%02x", out[i]);
fprintf_unfiltered (gdb_stdlog, "%02x", out[buf_offset + i]);
}
if (in != NULL)
regcache_raw_read_part (regcache, reg_num, reg_offset, length, in + buf_offset);
@ -216,9 +219,9 @@ mips_xfer_register (struct regcache *regcache, int reg_num, int length,
if (mips_debug && in != NULL)
{
int i;
fprintf_unfiltered (gdb_stdlog, "in: ");
fprintf_unfiltered (gdb_stdlog, "in ");
for (i = 0; i < length; i++)
fprintf_unfiltered (gdb_stdlog, "%02x", in[i]);
fprintf_unfiltered (gdb_stdlog, "%02x", in[buf_offset + i]);
}
if (mips_debug)
fprintf_unfiltered (gdb_stdlog, "\n");
@ -4541,25 +4544,6 @@ mips_eabi_extract_return_value (struct type *valtype,
hi.len);
}
static void
mips_o32_extract_return_value (struct type *valtype,
char regbuf[REGISTER_BYTES],
char *valbuf)
{
struct return_value_word lo;
struct return_value_word hi;
return_value_location (valtype, &hi, &lo);
memcpy (valbuf + lo.buf_offset,
regbuf + REGISTER_BYTE (lo.reg) + lo.reg_offset,
lo.len);
if (hi.len > 0)
memcpy (valbuf + hi.buf_offset,
regbuf + REGISTER_BYTE (hi.reg) + hi.reg_offset,
hi.len);
}
static void
mips_o64_extract_return_value (struct type *valtype,
char regbuf[REGISTER_BYTES],
@ -4606,30 +4590,6 @@ mips_eabi_store_return_value (struct type *valtype, char *valbuf)
}
}
static void
mips_o32_store_return_value (struct type *valtype, char *valbuf)
{
char *raw_buffer = alloca (MAX_REGISTER_RAW_SIZE);
struct return_value_word lo;
struct return_value_word hi;
return_value_location (valtype, &hi, &lo);
memset (raw_buffer, 0, sizeof (raw_buffer));
memcpy (raw_buffer + lo.reg_offset, valbuf + lo.buf_offset, lo.len);
write_register_bytes (REGISTER_BYTE (lo.reg),
raw_buffer,
REGISTER_RAW_SIZE (lo.reg));
if (hi.len > 0)
{
memset (raw_buffer, 0, sizeof (raw_buffer));
memcpy (raw_buffer + hi.reg_offset, valbuf + hi.buf_offset, hi.len);
write_register_bytes (REGISTER_BYTE (hi.reg),
raw_buffer,
REGISTER_RAW_SIZE (hi.reg));
}
}
static void
mips_o64_store_return_value (struct type *valtype, char *valbuf)
{
@ -4654,6 +4614,149 @@ mips_o64_store_return_value (struct type *valtype, char *valbuf)
}
}
/* O32 ABI stuff. */
static void
mips_o32_xfer_return_value (struct type *type,
struct regcache *regcache,
bfd_byte *in, const bfd_byte *out)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
if (TYPE_CODE (type) == TYPE_CODE_FLT
&& TYPE_LENGTH (type) == 4
&& tdep->mips_fpu_type != MIPS_FPU_NONE)
{
/* A single-precision floating-point value. It fits in the
least significant part of FP0. */
if (mips_debug)
fprintf_unfiltered (gdb_stderr, "Return float in $fp0\n");
mips_xfer_register (regcache, FP0_REGNUM, TYPE_LENGTH (type),
TARGET_BYTE_ORDER, in, out, 0);
}
else if (TYPE_CODE (type) == TYPE_CODE_FLT
&& TYPE_LENGTH (type) == 8
&& tdep->mips_fpu_type != MIPS_FPU_NONE)
{
/* A double-precision floating-point value. It fits in the
least significant part of FP0/FP1 but with byte ordering
based on the target (???). */
if (mips_debug)
fprintf_unfiltered (gdb_stderr, "Return float in $fp0/$fp1\n");
switch (TARGET_BYTE_ORDER)
{
case BFD_ENDIAN_LITTLE:
mips_xfer_register (regcache, FP0_REGNUM + 0, 4,
TARGET_BYTE_ORDER, in, out, 0);
mips_xfer_register (regcache, FP0_REGNUM + 1, 4,
TARGET_BYTE_ORDER, in, out, 4);
break;
case BFD_ENDIAN_BIG:
mips_xfer_register (regcache, FP0_REGNUM + 1, 4,
TARGET_BYTE_ORDER, in, out, 0);
mips_xfer_register (regcache, FP0_REGNUM + 0, 4,
TARGET_BYTE_ORDER, in, out, 4);
break;
default:
internal_error (__FILE__, __LINE__, "bad switch");
}
}
#if 0
else if (TYPE_CODE (type) == TYPE_CODE_STRUCT
&& TYPE_NFIELDS (type) <= 2
&& TYPE_NFIELDS (type) >= 1
&& ((TYPE_NFIELDS (type) == 1
&& (TYPE_CODE (TYPE_FIELD_TYPE (type, 0))
== TYPE_CODE_FLT))
|| (TYPE_NFIELDS (type) == 2
&& (TYPE_CODE (TYPE_FIELD_TYPE (type, 0))
== TYPE_CODE_FLT)
&& (TYPE_CODE (TYPE_FIELD_TYPE (type, 1))
== TYPE_CODE_FLT)))
&& tdep->mips_fpu_type != MIPS_FPU_NONE)
{
/* A struct that contains one or two floats. Each value is part
in the least significant part of their floating point
register.. */
bfd_byte *reg = alloca (MAX_REGISTER_RAW_SIZE);
int regnum;
int field;
for (field = 0, regnum = FP0_REGNUM;
field < TYPE_NFIELDS (type);
field++, regnum += 2)
{
int offset = (FIELD_BITPOS (TYPE_FIELDS (type)[field])
/ TARGET_CHAR_BIT);
if (mips_debug)
fprintf_unfiltered (gdb_stderr, "Return float struct+%d\n", offset);
mips_xfer_register (regcache, regnum, TYPE_LENGTH (TYPE_FIELD_TYPE (type, field)),
TARGET_BYTE_ORDER, in, out, offset);
}
}
#endif
#if 0
else if (TYPE_CODE (type) == TYPE_CODE_STRUCT
|| TYPE_CODE (type) == TYPE_CODE_UNION)
{
/* A structure or union. Extract the left justified value,
regardless of the byte order. I.e. DO NOT USE
mips_xfer_lower. */
int offset;
int regnum;
for (offset = 0, regnum = V0_REGNUM;
offset < TYPE_LENGTH (type);
offset += REGISTER_RAW_SIZE (regnum), regnum++)
{
int xfer = REGISTER_RAW_SIZE (regnum);
if (offset + xfer > TYPE_LENGTH (type))
xfer = TYPE_LENGTH (type) - offset;
if (mips_debug)
fprintf_unfiltered (gdb_stderr, "Return struct+%d:%d in $%d\n",
offset, xfer, regnum);
mips_xfer_register (regcache, regnum, xfer, BFD_ENDIAN_UNKNOWN,
in, out, offset);
}
}
#endif
else
{
/* A scalar extract each part but least-significant-byte
justified. o32 thinks registers are 4 byte, regardless of
the ISA. mips_stack_argsize controls this. */
int offset;
int regnum;
for (offset = 0, regnum = V0_REGNUM;
offset < TYPE_LENGTH (type);
offset += mips_stack_argsize (), regnum++)
{
int xfer = mips_stack_argsize ();
int pos = 0;
if (offset + xfer > TYPE_LENGTH (type))
xfer = TYPE_LENGTH (type) - offset;
if (mips_debug)
fprintf_unfiltered (gdb_stderr, "Return scalar+%d:%d in $%d\n",
offset, xfer, regnum);
mips_xfer_register (regcache, regnum, xfer, TARGET_BYTE_ORDER,
in, out, offset);
}
}
}
static void
mips_o32_extract_return_value (struct type *type,
struct regcache *regcache,
char *valbuf)
{
mips_o32_xfer_return_value (type, regcache, valbuf, NULL);
}
static void
mips_o32_store_return_value (struct type *type, char *valbuf)
{
mips_o32_xfer_return_value (type, current_regcache, NULL, valbuf);
}
/* N32/N44 ABI stuff. */
static void
mips_n32n64_xfer_return_value (struct type *type,
struct regcache *regcache,
@ -5570,7 +5673,7 @@ mips_gdbarch_init (struct gdbarch_info info,
case MIPS_ABI_O32:
set_gdbarch_push_arguments (gdbarch, mips_o32_push_arguments);
set_gdbarch_store_return_value (gdbarch, mips_o32_store_return_value);
set_gdbarch_deprecated_extract_return_value (gdbarch, mips_o32_extract_return_value);
set_gdbarch_extract_return_value (gdbarch, mips_o32_extract_return_value);
tdep->mips_default_saved_regsize = 4;
tdep->mips_default_stack_argsize = 4;
tdep->mips_fp_register_double = 0;