return sp;
}
-/* Handle the return-value conventions for Decimal Floating Point values
- in both ppc32 and ppc64, which are the same. */
+/* Handle the return-value conventions for Decimal Floating Point values. */
static int
get_decimal_float_return_value (struct gdbarch *gdbarch, struct type *valtype,
struct regcache *regcache, gdb_byte *readbuf,
return 1;
}
-/* Push a float in either registers, or in the stack. Using the ppc 64 bit
- SysV ABI.
+/* Structure holding the next argument position. */
+struct ppc64_sysv_argpos
+ {
+ /* Register cache holding argument registers. If this is NULL,
+ we only simulate argument processing without actually updating
+ any registers or memory. */
+ struct regcache *regcache;
+ /* Next available general-purpose argument register. */
+ int greg;
+ /* Next available floating-point argument register. */
+ int freg;
+ /* Next available vector argument register. */
+ int vreg;
+ /* The address, at which the next general purpose parameter
+ (integer, struct, float, vector, ...) should be saved. */
+ CORE_ADDR gparam;
+ /* The address, at which the next by-reference parameter
+ (non-Altivec vector, variably-sized type) should be saved. */
+ CORE_ADDR refparam;
+ };
+
+/* VAL is a value of length LEN. Store it into the argument area on the
+ stack and load it into the corresponding general-purpose registers
+ required by the ABI, and update ARGPOS.
+
+ If ALIGN is nonzero, it specifies the minimum alignment required
+ for the on-stack copy of the argument. */
- This implements a dumbed down version of the ABI. It always writes
- values to memory, GPR and FPR, even when not necessary. Doing this
- greatly simplifies the logic. */
+static void
+ppc64_sysv_abi_push_val (struct gdbarch *gdbarch,
+ const bfd_byte *val, int len, int align,
+ struct ppc64_sysv_argpos *argpos)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ int offset = 0;
+
+ /* Enforce alignment of stack location, if requested. */
+ if (align > tdep->wordsize)
+ {
+ CORE_ADDR aligned_gparam = align_up (argpos->gparam, align);
+
+ argpos->greg += (aligned_gparam - argpos->gparam) / tdep->wordsize;
+ argpos->gparam = aligned_gparam;
+ }
+
+ /* The ABI (version 1.9) specifies that values smaller than one
+ doubleword are right-aligned and those larger are left-aligned.
+ GCC versions before 3.4 implemented this incorrectly; see
+ <http://gcc.gnu.org/gcc-3.4/powerpc-abi.html>. */
+ if (len < tdep->wordsize)
+ offset = tdep->wordsize - len;
+
+ if (argpos->regcache)
+ write_memory (argpos->gparam + offset, val, len);
+ argpos->gparam = align_up (argpos->gparam + len, tdep->wordsize);
+
+ while (len >= tdep->wordsize)
+ {
+ if (argpos->regcache && argpos->greg <= 10)
+ regcache_cooked_write (argpos->regcache,
+ tdep->ppc_gp0_regnum + argpos->greg, val);
+ argpos->greg++;
+ len -= tdep->wordsize;
+ val += tdep->wordsize;
+ }
+
+ if (len > 0)
+ {
+ if (argpos->regcache && argpos->greg <= 10)
+ regcache_cooked_write_part (argpos->regcache,
+ tdep->ppc_gp0_regnum + argpos->greg,
+ offset, len, val);
+ argpos->greg++;
+ }
+}
+
+/* The same as ppc64_sysv_abi_push_val, but using a single-word integer
+ value VAL as argument. */
static void
-ppc64_sysv_abi_push_float (struct gdbarch *gdbarch, struct regcache *regcache,
- struct gdbarch_tdep *tdep, struct type *type,
- const bfd_byte *val, int freg, int greg,
- CORE_ADDR gparam)
+ppc64_sysv_abi_push_integer (struct gdbarch *gdbarch, ULONGEST val,
+ struct ppc64_sysv_argpos *argpos)
{
- gdb_byte regval[MAX_REGISTER_SIZE];
- const gdb_byte *p;
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ gdb_byte buf[MAX_REGISTER_SIZE];
- if (TYPE_LENGTH (type) <= 8)
+ if (argpos->regcache)
+ store_unsigned_integer (buf, tdep->wordsize, byte_order, val);
+ ppc64_sysv_abi_push_val (gdbarch, buf, tdep->wordsize, 0, argpos);
+}
+
+/* VAL is a value of TYPE, a (binary or decimal) floating-point type.
+ Load it into a floating-point register if required by the ABI,
+ and update ARGPOS. */
+
+static void
+ppc64_sysv_abi_push_freg (struct gdbarch *gdbarch,
+ struct type *type, const bfd_byte *val,
+ struct ppc64_sysv_argpos *argpos)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ if (tdep->soft_float)
+ return;
+
+ if (TYPE_LENGTH (type) <= 8
+ && TYPE_CODE (type) == TYPE_CODE_FLT)
{
- /* Version 1.7 of the 64-bit PowerPC ELF ABI says:
+ /* Floats and doubles go in f1 .. f13. 32-bit floats are converted
+ to double first. */
+ if (argpos->regcache && argpos->freg <= 13)
+ {
+ int regnum = tdep->ppc_fp0_regnum + argpos->freg;
+ struct type *regtype = register_type (gdbarch, regnum);
+ gdb_byte regval[MAX_REGISTER_SIZE];
- "Single precision floating point values are mapped to
- the first word in a single doubleword."
+ convert_typed_floating (val, type, regval, regtype);
+ regcache_cooked_write (argpos->regcache, regnum, regval);
+ }
- And version 1.9 says:
+ argpos->freg++;
+ }
+ else if (TYPE_LENGTH (type) <= 8
+ && TYPE_CODE (type) == TYPE_CODE_DECFLOAT)
+ {
+ /* Floats and doubles go in f1 .. f13. 32-bit decimal floats are
+ placed in the least significant word. */
+ if (argpos->regcache && argpos->freg <= 13)
+ {
+ int regnum = tdep->ppc_fp0_regnum + argpos->freg;
+ int offset = 8 - TYPE_LENGTH (type);
- "Single precision floating point values are mapped to
- the second word in a single doubleword."
+ regcache_cooked_write_part (argpos->regcache, regnum,
+ offset, TYPE_LENGTH (type), val);
+ }
- GDB then writes single precision floating point values
- at both words in a doubleword, to support both ABIs. */
- if (TYPE_LENGTH (type) == 4)
+ argpos->freg++;
+ }
+ else if (TYPE_LENGTH (type) == 16
+ && TYPE_CODE (type) == TYPE_CODE_FLT
+ && (gdbarch_long_double_format (gdbarch)
+ == floatformats_ibm_long_double))
+ {
+ /* IBM long double stored in two consecutive FPRs. */
+ if (argpos->regcache && argpos->freg <= 13)
{
- memcpy (regval, val, 4);
- memcpy (regval + 4, val, 4);
- p = regval;
+ int regnum = tdep->ppc_fp0_regnum + argpos->freg;
+
+ regcache_cooked_write (argpos->regcache, regnum, val);
+ if (argpos->freg <= 12)
+ regcache_cooked_write (argpos->regcache, regnum + 1, val + 8);
}
- else
- p = val;
- /* Write value in the stack's parameter save area. */
- write_memory (gparam, p, 8);
+ argpos->freg += 2;
+ }
+ else if (TYPE_LENGTH (type) == 16
+ && TYPE_CODE (type) == TYPE_CODE_DECFLOAT)
+ {
+ /* 128-bit decimal floating-point values are stored in and even/odd
+ pair of FPRs, with the even FPR holding the most significant half. */
+ argpos->freg += argpos->freg & 1;
- /* Floats and Doubles go in f1 .. f13. They also consume a left aligned
- GREG, and can end up in memory. */
- if (freg <= 13)
+ if (argpos->regcache && argpos->freg <= 12)
{
- struct type *regtype;
+ int regnum = tdep->ppc_fp0_regnum + argpos->freg;
- regtype = register_type (gdbarch, tdep->ppc_fp0_regnum + freg);
- convert_typed_floating (val, type, regval, regtype);
- regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + freg, regval);
+ regcache_cooked_write (argpos->regcache, regnum, val);
+ regcache_cooked_write (argpos->regcache, regnum + 1, val + 8);
}
- if (greg <= 10)
- regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + greg, regval);
+
+ argpos->freg += 2;
}
- else
+}
+
+/* VAL is a value of AltiVec vector type. Load it into a vector register
+ if required by the ABI, and update ARGPOS. */
+
+static void
+ppc64_sysv_abi_push_vreg (struct gdbarch *gdbarch, const bfd_byte *val,
+ struct ppc64_sysv_argpos *argpos)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ if (argpos->regcache && argpos->vreg <= 13)
+ regcache_cooked_write (argpos->regcache,
+ tdep->ppc_vr0_regnum + argpos->vreg, val);
+
+ argpos->vreg++;
+}
+
+/* VAL is a value of TYPE. Load it into memory and/or registers
+ as required by the ABI, and update ARGPOS. */
+
+static void
+ppc64_sysv_abi_push_param (struct gdbarch *gdbarch,
+ struct type *type, const bfd_byte *val,
+ struct ppc64_sysv_argpos *argpos)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ if (TYPE_CODE (type) == TYPE_CODE_FLT
+ || TYPE_CODE (type) == TYPE_CODE_DECFLOAT)
+ {
+ /* Floating-point scalars are passed in floating-point registers. */
+ ppc64_sysv_abi_push_val (gdbarch, val, TYPE_LENGTH (type), 0, argpos);
+ ppc64_sysv_abi_push_freg (gdbarch, type, val, argpos);
+ }
+ else if (TYPE_CODE (type) == TYPE_CODE_ARRAY && TYPE_VECTOR (type)
+ && tdep->vector_abi == POWERPC_VEC_ALTIVEC
+ && TYPE_LENGTH (type) == 16)
+ {
+ /* AltiVec vectors are passed aligned, and in vector registers. */
+ ppc64_sysv_abi_push_val (gdbarch, val, TYPE_LENGTH (type), 16, argpos);
+ ppc64_sysv_abi_push_vreg (gdbarch, val, argpos);
+ }
+ else if (TYPE_CODE (type) == TYPE_CODE_ARRAY && TYPE_VECTOR (type)
+ && TYPE_LENGTH (type) >= 16)
{
- /* IBM long double stored in two doublewords of the
- parameter save area and corresponding registers. */
- if (!tdep->soft_float && freg <= 13)
+ /* Non-Altivec vectors are passed by reference. */
+
+ /* Copy value onto the stack ... */
+ CORE_ADDR addr = align_up (argpos->refparam, 16);
+ if (argpos->regcache)
+ write_memory (addr, val, TYPE_LENGTH (type));
+ argpos->refparam = align_up (addr + TYPE_LENGTH (type), tdep->wordsize);
+
+ /* ... and pass a pointer to the copy as parameter. */
+ ppc64_sysv_abi_push_integer (gdbarch, addr, argpos);
+ }
+ else if ((TYPE_CODE (type) == TYPE_CODE_INT
+ || TYPE_CODE (type) == TYPE_CODE_ENUM
+ || TYPE_CODE (type) == TYPE_CODE_BOOL
+ || TYPE_CODE (type) == TYPE_CODE_CHAR
+ || TYPE_CODE (type) == TYPE_CODE_PTR
+ || TYPE_CODE (type) == TYPE_CODE_REF)
+ && TYPE_LENGTH (type) <= tdep->wordsize)
+ {
+ ULONGEST word = 0;
+
+ if (argpos->regcache)
{
- regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + freg, val);
- if (freg <= 12)
- regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + freg + 1,
- val + 8);
+ /* Sign extend the value, then store it unsigned. */
+ word = unpack_long (type, val);
+
+ /* Convert any function code addresses into descriptors. */
+ if (TYPE_CODE (type) == TYPE_CODE_PTR
+ || TYPE_CODE (type) == TYPE_CODE_REF)
+ {
+ struct type *target_type
+ = check_typedef (TYPE_TARGET_TYPE (type));
+
+ if (TYPE_CODE (target_type) == TYPE_CODE_FUNC
+ || TYPE_CODE (target_type) == TYPE_CODE_METHOD)
+ {
+ CORE_ADDR desc = word;
+
+ convert_code_addr_to_desc_addr (word, &desc);
+ word = desc;
+ }
+ }
}
- if (greg <= 10)
+
+ ppc64_sysv_abi_push_integer (gdbarch, word, argpos);
+ }
+ else
+ {
+ ppc64_sysv_abi_push_val (gdbarch, val, TYPE_LENGTH (type), 0, argpos);
+
+ /* The ABI (version 1.9) specifies that structs containing a
+ single floating-point value, at any level of nesting of
+ single-member structs, are passed in floating-point registers. */
+ if (TYPE_CODE (type) == TYPE_CODE_STRUCT
+ && TYPE_NFIELDS (type) == 1)
{
- regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + greg, val);
- if (greg <= 9)
- regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + greg + 1,
- val + 8);
+ while (TYPE_CODE (type) == TYPE_CODE_STRUCT
+ && TYPE_NFIELDS (type) == 1)
+ type = check_typedef (TYPE_FIELD_TYPE (type, 0));
+
+ if (TYPE_CODE (type) == TYPE_CODE_FLT)
+ ppc64_sysv_abi_push_freg (gdbarch, type, val, argpos);
}
- write_memory (gparam, val, TYPE_LENGTH (type));
}
}
for (write_pass = 0; write_pass < 2; write_pass++)
{
int argno;
- /* Next available floating point register for float and double
- arguments. */
- int freg = 1;
- /* Next available general register for non-vector (but possibly
- float) arguments. */
- int greg = 3;
- /* Next available vector register for vector arguments. */
- int vreg = 2;
- /* The address, at which the next general purpose parameter
- (integer, struct, float, vector, ...) should be saved. */
- CORE_ADDR gparam;
- /* The address, at which the next by-reference parameter
- (non-Altivec vector, variably-sized type) should be saved. */
- CORE_ADDR refparam;
+
+ struct ppc64_sysv_argpos argpos;
+ argpos.greg = 3;
+ argpos.freg = 1;
+ argpos.vreg = 2;
if (!write_pass)
{
offsets (start address zero) than addresses. That way
they accumulate the total stack space each region
requires. */
- gparam = 0;
- refparam = 0;
+ argpos.regcache = NULL;
+ argpos.gparam = 0;
+ argpos.refparam = 0;
}
else
{
/* Decrement the stack pointer making space for the Altivec
and general on-stack parameters. Set refparam and gparam
to their corresponding regions. */
- refparam = align_down (sp - refparam_size, 16);
- gparam = align_down (refparam - gparam_size, 16);
+ argpos.regcache = regcache;
+ argpos.refparam = align_down (sp - refparam_size, 16);
+ argpos.gparam = align_down (argpos.refparam - gparam_size, 16);
/* Add in space for the TOC, link editor double word,
compiler double word, LR save area, CR save area. */
- sp = align_down (gparam - 48, 16);
+ sp = align_down (argpos.gparam - 48, 16);
}
/* If the function is returning a `struct', then there is an
should advance one word and start from r4 register to copy
parameters. This also consumes one on-stack parameter slot. */
if (struct_return)
- {
- if (write_pass)
- regcache_cooked_write_signed (regcache,
- tdep->ppc_gp0_regnum + greg,
- struct_addr);
- greg++;
- gparam = align_up (gparam + tdep->wordsize, tdep->wordsize);
- }
+ ppc64_sysv_abi_push_integer (gdbarch, struct_addr, &argpos);
for (argno = 0; argno < nargs; argno++)
{
struct type *type = check_typedef (value_type (arg));
const bfd_byte *val = value_contents (arg);
- if (TYPE_CODE (type) == TYPE_CODE_FLT && TYPE_LENGTH (type) <= 8)
+ if (TYPE_CODE (type) == TYPE_CODE_COMPLEX)
{
- if (write_pass)
- ppc64_sysv_abi_push_float (gdbarch, regcache, tdep, type,
- val, freg, greg, gparam);
-
- freg++;
- greg++;
- /* Always consume parameter stack space. */
- gparam = align_up (gparam + 8, tdep->wordsize);
- }
- else if (TYPE_CODE (type) == TYPE_CODE_FLT
- && TYPE_LENGTH (type) == 16
- && (gdbarch_long_double_format (gdbarch)
- == floatformats_ibm_long_double))
- {
- if (write_pass)
- ppc64_sysv_abi_push_float (gdbarch, regcache, tdep, type,
- val, freg, greg, gparam);
- freg += 2;
- greg += 2;
- gparam = align_up (gparam + TYPE_LENGTH (type), tdep->wordsize);
- }
- else if (TYPE_CODE (type) == TYPE_CODE_COMPLEX
- && (TYPE_LENGTH (type) == 8 || TYPE_LENGTH (type) == 16))
- {
- int i;
-
- for (i = 0; i < 2; i++)
- {
- if (write_pass)
- {
- struct type *target_type;
-
- target_type = check_typedef (TYPE_TARGET_TYPE (type));
- ppc64_sysv_abi_push_float (gdbarch, regcache, tdep,
- target_type, val + i *
- TYPE_LENGTH (target_type),
- freg, greg, gparam);
- }
- freg++;
- greg++;
- /* Always consume parameter stack space. */
- gparam = align_up (gparam + 8, tdep->wordsize);
- }
- }
- else if (TYPE_CODE (type) == TYPE_CODE_COMPLEX
- && TYPE_LENGTH (type) == 32
- && (gdbarch_long_double_format (gdbarch)
- == floatformats_ibm_long_double))
- {
- int i;
-
- for (i = 0; i < 2; i++)
- {
- struct type *target_type;
-
- target_type = check_typedef (TYPE_TARGET_TYPE (type));
- if (write_pass)
- ppc64_sysv_abi_push_float (gdbarch, regcache, tdep,
- target_type, val + i *
- TYPE_LENGTH (target_type),
- freg, greg, gparam);
- freg += 2;
- greg += 2;
- gparam = align_up (gparam + TYPE_LENGTH (target_type),
- tdep->wordsize);
- }
- }
- else if (TYPE_CODE (type) == TYPE_CODE_DECFLOAT
- && TYPE_LENGTH (type) <= 8)
- {
- /* 32-bit and 64-bit decimal floats go in f1 .. f13. They can
- end up in memory. */
- if (write_pass)
- {
- gdb_byte regval[MAX_REGISTER_SIZE];
- const gdb_byte *p;
-
- /* 32-bit decimal floats are right aligned in the
- doubleword. */
- if (TYPE_LENGTH (type) == 4)
- {
- memcpy (regval + 4, val, 4);
- p = regval;
- }
- else
- p = val;
-
- /* Write value in the stack's parameter save area. */
- write_memory (gparam, p, 8);
-
- if (freg <= 13)
- regcache_cooked_write (regcache,
- tdep->ppc_fp0_regnum + freg, p);
- }
-
- freg++;
- greg++;
- /* Always consume parameter stack space. */
- gparam = align_up (gparam + 8, tdep->wordsize);
- }
- else if (TYPE_CODE (type) == TYPE_CODE_DECFLOAT &&
- TYPE_LENGTH (type) == 16)
- {
- /* 128-bit decimal floats go in f2 .. f12, always in even/odd
- pairs. They can end up in memory, using two doublewords. */
- if (write_pass)
- {
- if (freg <= 12)
- {
- /* Make sure freg is even. */
- freg += freg & 1;
- regcache_cooked_write (regcache,
- tdep->ppc_fp0_regnum + freg, val);
- regcache_cooked_write (regcache,
- tdep->ppc_fp0_regnum + freg + 1, val + 8);
- }
-
- write_memory (gparam, val, TYPE_LENGTH (type));
- }
+ /* Complex types are passed as if two independent scalars. */
+ struct type *eltype = check_typedef (TYPE_TARGET_TYPE (type));
- freg += 2;
- greg += 2;
- gparam = align_up (gparam + TYPE_LENGTH (type), tdep->wordsize);
+ ppc64_sysv_abi_push_param (gdbarch, eltype, val, &argpos);
+ ppc64_sysv_abi_push_param (gdbarch, eltype,
+ val + TYPE_LENGTH (eltype), &argpos);
}
- else if (TYPE_LENGTH (type) < 16
- && TYPE_CODE (type) == TYPE_CODE_ARRAY
- && TYPE_VECTOR (type)
+ else if (TYPE_CODE (type) == TYPE_CODE_ARRAY && TYPE_VECTOR (type)
&& opencl_abi)
{
/* OpenCL vectors shorter than 16 bytes are passed as if
- a series of independent scalars. */
- struct type *eltype = check_typedef (TYPE_TARGET_TYPE (type));
- int i, nelt = TYPE_LENGTH (type) / TYPE_LENGTH (eltype);
+ a series of independent scalars; OpenCL vectors 16 bytes
+ or longer are passed as if a series of AltiVec vectors. */
+ struct type *eltype;
+ int i, nelt;
+ if (TYPE_LENGTH (type) < 16)
+ eltype = check_typedef (TYPE_TARGET_TYPE (type));
+ else
+ eltype = register_type (gdbarch, tdep->ppc_vr0_regnum);
+
+ nelt = TYPE_LENGTH (type) / TYPE_LENGTH (eltype);
for (i = 0; i < nelt; i++)
{
const gdb_byte *elval = val + i * TYPE_LENGTH (eltype);
- if (TYPE_CODE (eltype) == TYPE_CODE_FLT)
- {
- if (write_pass)
- {
- gdb_byte regval[MAX_REGISTER_SIZE];
- const gdb_byte *p;
-
- if (TYPE_LENGTH (eltype) == 4)
- {
- memcpy (regval, elval, 4);
- memcpy (regval + 4, elval, 4);
- p = regval;
- }
- else
- p = elval;
-
- write_memory (gparam, p, 8);
-
- if (freg <= 13)
- {
- int regnum = tdep->ppc_fp0_regnum + freg;
- struct type *regtype
- = register_type (gdbarch, regnum);
-
- convert_typed_floating (elval, eltype,
- regval, regtype);
- regcache_cooked_write (regcache, regnum, regval);
- }
-
- if (greg <= 10)
- regcache_cooked_write (regcache,
- tdep->ppc_gp0_regnum + greg,
- regval);
- }
-
- freg++;
- greg++;
- gparam = align_up (gparam + 8, tdep->wordsize);
- }
- else
- {
- if (write_pass)
- {
- ULONGEST word = unpack_long (eltype, elval);
- if (greg <= 10)
- regcache_cooked_write_unsigned
- (regcache, tdep->ppc_gp0_regnum + greg, word);
-
- write_memory_unsigned_integer
- (gparam, tdep->wordsize, byte_order, word);
- }
-
- greg++;
- gparam = align_up (gparam + TYPE_LENGTH (eltype),
- tdep->wordsize);
- }
- }
- }
- else if (TYPE_LENGTH (type) >= 16
- && TYPE_CODE (type) == TYPE_CODE_ARRAY
- && TYPE_VECTOR (type)
- && opencl_abi)
- {
- /* OpenCL vectors 16 bytes or longer are passed as if
- a series of AltiVec vectors. */
- int i;
-
- for (i = 0; i < TYPE_LENGTH (type) / 16; i++)
- {
- const gdb_byte *elval = val + i * 16;
-
- gparam = align_up (gparam, 16);
- greg += greg & 1;
-
- if (write_pass)
- {
- if (vreg <= 13)
- regcache_cooked_write (regcache,
- tdep->ppc_vr0_regnum + vreg,
- elval);
-
- write_memory (gparam, elval, 16);
- }
-
- greg += 2;
- vreg++;
- gparam += 16;
- }
- }
- else if (TYPE_LENGTH (type) == 16 && TYPE_VECTOR (type)
- && TYPE_CODE (type) == TYPE_CODE_ARRAY
- && tdep->vector_abi == POWERPC_VEC_ALTIVEC)
- {
- /* In the Altivec ABI, vectors go in the vector registers
- v2 .. v13, as well as the parameter area -- always at
- 16-byte aligned addresses. */
-
- gparam = align_up (gparam, 16);
- greg += greg & 1;
-
- if (write_pass)
- {
- if (vreg <= 13)
- regcache_cooked_write (regcache,
- tdep->ppc_vr0_regnum + vreg, val);
-
- write_memory (gparam, val, TYPE_LENGTH (type));
- }
-
- greg += 2;
- vreg++;
- gparam += 16;
- }
- else if (TYPE_LENGTH (type) >= 16 && TYPE_VECTOR (type)
- && TYPE_CODE (type) == TYPE_CODE_ARRAY)
- {
- /* Non-Altivec vectors are passed by reference. */
-
- /* Copy value onto the stack ... */
- refparam = align_up (refparam, 16);
- if (write_pass)
- write_memory (refparam, val, TYPE_LENGTH (type));
-
- /* ... and pass a pointer to the copy as parameter. */
- if (write_pass)
- {
- if (greg <= 10)
- regcache_cooked_write_unsigned (regcache,
- tdep->ppc_gp0_regnum +
- greg, refparam);
- write_memory_unsigned_integer (gparam, tdep->wordsize,
- byte_order, refparam);
- }
- greg++;
- gparam = align_up (gparam + tdep->wordsize, tdep->wordsize);
- refparam = align_up (refparam + TYPE_LENGTH (type), tdep->wordsize);
- }
- else if ((TYPE_CODE (type) == TYPE_CODE_INT
- || TYPE_CODE (type) == TYPE_CODE_ENUM
- || TYPE_CODE (type) == TYPE_CODE_BOOL
- || TYPE_CODE (type) == TYPE_CODE_CHAR
- || TYPE_CODE (type) == TYPE_CODE_PTR
- || TYPE_CODE (type) == TYPE_CODE_REF)
- && TYPE_LENGTH (type) <= 8)
- {
- /* Scalars and Pointers get sign[un]extended and go in
- gpr3 .. gpr10. They can also end up in memory. */
- if (write_pass)
- {
- /* Sign extend the value, then store it unsigned. */
- ULONGEST word = unpack_long (type, val);
- /* Convert any function code addresses into
- descriptors. */
- if (TYPE_CODE (type) == TYPE_CODE_PTR
- || TYPE_CODE (type) == TYPE_CODE_REF)
- {
- struct type *target_type;
- target_type = check_typedef (TYPE_TARGET_TYPE (type));
-
- if (TYPE_CODE (target_type) == TYPE_CODE_FUNC
- || TYPE_CODE (target_type) == TYPE_CODE_METHOD)
- {
- CORE_ADDR desc = word;
- convert_code_addr_to_desc_addr (word, &desc);
- word = desc;
- }
- }
- if (greg <= 10)
- regcache_cooked_write_unsigned (regcache,
- tdep->ppc_gp0_regnum +
- greg, word);
- write_memory_unsigned_integer (gparam, tdep->wordsize,
- byte_order, word);
+ ppc64_sysv_abi_push_param (gdbarch, eltype, elval, &argpos);
}
- greg++;
- gparam = align_up (gparam + TYPE_LENGTH (type), tdep->wordsize);
}
else
{
- int byte;
- for (byte = 0; byte < TYPE_LENGTH (type);
- byte += tdep->wordsize)
- {
- if (write_pass && greg <= 10)
- {
- gdb_byte regval[MAX_REGISTER_SIZE];
- int len = TYPE_LENGTH (type) - byte;
- if (len > tdep->wordsize)
- len = tdep->wordsize;
- memset (regval, 0, sizeof regval);
- /* The ABI (version 1.9) specifies that values
- smaller than one doubleword are right-aligned
- and those larger are left-aligned. GCC
- versions before 3.4 implemented this
- incorrectly; see
- <http://gcc.gnu.org/gcc-3.4/powerpc-abi.html>. */
- if (byte == 0)
- memcpy (regval + tdep->wordsize - len,
- val + byte, len);
- else
- memcpy (regval, val + byte, len);
- regcache_cooked_write (regcache, greg, regval);
- }
- greg++;
- }
- if (write_pass)
- {
- /* WARNING: cagney/2003-09-21: Strictly speaking, this
- isn't necessary, unfortunately, GCC appears to get
- "struct convention" parameter passing wrong putting
- odd sized structures in memory instead of in a
- register. Work around this by always writing the
- value to memory. Fortunately, doing this
- simplifies the code. */
- int len = TYPE_LENGTH (type);
- if (len < tdep->wordsize)
- write_memory (gparam + tdep->wordsize - len, val, len);
- else
- write_memory (gparam, val, len);
- }
- if (freg <= 13
- && TYPE_CODE (type) == TYPE_CODE_STRUCT
- && TYPE_NFIELDS (type) == 1
- && TYPE_LENGTH (type) <= 16)
- {
- /* The ABI (version 1.9) specifies that structs
- containing a single floating-point value, at any
- level of nesting of single-member structs, are
- passed in floating-point registers. */
- while (TYPE_CODE (type) == TYPE_CODE_STRUCT
- && TYPE_NFIELDS (type) == 1)
- type = check_typedef (TYPE_FIELD_TYPE (type, 0));
- if (TYPE_CODE (type) == TYPE_CODE_FLT)
- {
- if (TYPE_LENGTH (type) <= 8)
- {
- if (write_pass)
- {
- gdb_byte regval[MAX_REGISTER_SIZE];
- struct type *regtype
- = register_type (gdbarch,
- tdep->ppc_fp0_regnum);
- convert_typed_floating (val, type, regval,
- regtype);
- regcache_cooked_write (regcache,
- (tdep->ppc_fp0_regnum
- + freg),
- regval);
- }
- freg++;
- }
- else if (TYPE_LENGTH (type) == 16
- && (gdbarch_long_double_format (gdbarch)
- == floatformats_ibm_long_double))
- {
- if (write_pass)
- {
- regcache_cooked_write (regcache,
- (tdep->ppc_fp0_regnum
- + freg),
- val);
- if (freg <= 12)
- regcache_cooked_write (regcache,
- (tdep->ppc_fp0_regnum
- + freg + 1),
- val + 8);
- }
- freg += 2;
- }
- }
- }
- /* Always consume parameter stack space. */
- gparam = align_up (gparam + TYPE_LENGTH (type), tdep->wordsize);
+ /* All other types are passed as single arguments. */
+ ppc64_sysv_abi_push_param (gdbarch, type, val, &argpos);
}
}
if (!write_pass)
{
/* Save the true region sizes ready for the second pass. */
- refparam_size = refparam;
+ refparam_size = argpos.refparam;
/* Make certain that the general parameter save area is at
least the minimum 8 registers (or doublewords) in size. */
- if (greg < 8)
+ if (argpos.greg < 8)
gparam_size = 8 * tdep->wordsize;
else
- gparam_size = gparam;
+ gparam_size = argpos.gparam;
}
}
return sp;
}
+/* Subroutine of ppc64_sysv_abi_return_value that handles "base" types:
+ integer, floating-point, and AltiVec vector types.
-/* The 64 bit ABI return value convention.
-
- Return non-zero if the return-value is stored in a register, return
- 0 if the return-value is instead stored on the stack (a.k.a.,
- struct return convention).
+ This routine also handles components of aggregate return types;
+ INDEX describes which part of the aggregate is to be handled.
- For a return-value stored in a register: when WRITEBUF is non-NULL,
- copy the buffer to the corresponding register return-value location
- location; when READBUF is non-NULL, fill the buffer from the
- corresponding register return-value location. */
-enum return_value_convention
-ppc64_sysv_abi_return_value (struct gdbarch *gdbarch, struct value *function,
- struct type *valtype, struct regcache *regcache,
- gdb_byte *readbuf, const gdb_byte *writebuf)
+ Returns true if VALTYPE is some such base type that could be handled,
+ false otherwise. */
+static int
+ppc64_sysv_abi_return_value_base (struct gdbarch *gdbarch, struct type *valtype,
+ struct regcache *regcache, gdb_byte *readbuf,
+ const gdb_byte *writebuf, int index)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- struct type *func_type = function ? value_type (function) : NULL;
- int opencl_abi = func_type? ppc_sysv_use_opencl_abi (func_type) : 0;
- /* This function exists to support a calling convention that
- requires floating-point registers. It shouldn't be used on
- processors that lack them. */
- gdb_assert (ppc_floating_point_unit_p (gdbarch));
-
- /* Floats and doubles in F1. */
- if (TYPE_CODE (valtype) == TYPE_CODE_FLT && TYPE_LENGTH (valtype) <= 8)
- {
- gdb_byte regval[MAX_REGISTER_SIZE];
- struct type *regtype = register_type (gdbarch, tdep->ppc_fp0_regnum);
- if (writebuf != NULL)
- {
- convert_typed_floating (writebuf, valtype, regval, regtype);
- regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 1, regval);
- }
- if (readbuf != NULL)
- {
- regcache_cooked_read (regcache, tdep->ppc_fp0_regnum + 1, regval);
- convert_typed_floating (regval, regtype, readbuf, valtype);
- }
- return RETURN_VALUE_REGISTER_CONVENTION;
- }
- if (TYPE_CODE (valtype) == TYPE_CODE_DECFLOAT)
- return get_decimal_float_return_value (gdbarch, valtype, regcache, readbuf,
- writebuf);
- /* Integers in r3. */
+ /* Integers live in GPRs starting at r3. */
if ((TYPE_CODE (valtype) == TYPE_CODE_INT
|| TYPE_CODE (valtype) == TYPE_CODE_ENUM
|| TYPE_CODE (valtype) == TYPE_CODE_CHAR
|| TYPE_CODE (valtype) == TYPE_CODE_BOOL)
&& TYPE_LENGTH (valtype) <= 8)
{
+ int regnum = tdep->ppc_gp0_regnum + 3 + index;
+
if (writebuf != NULL)
{
/* Be careful to sign extend the value. */
- regcache_cooked_write_unsigned (regcache, tdep->ppc_gp0_regnum + 3,
+ regcache_cooked_write_unsigned (regcache, regnum,
unpack_long (valtype, writebuf));
}
if (readbuf != NULL)
{
- /* Extract the integer from r3. Since this is truncating the
+ /* Extract the integer from GPR. Since this is truncating the
value, there isn't a sign extension problem. */
ULONGEST regval;
- regcache_cooked_read_unsigned (regcache, tdep->ppc_gp0_regnum + 3,
- ®val);
- store_unsigned_integer (readbuf, TYPE_LENGTH (valtype), byte_order,
- regval);
+
+ regcache_cooked_read_unsigned (regcache, regnum, ®val);
+ store_unsigned_integer (readbuf, TYPE_LENGTH (valtype),
+ gdbarch_byte_order (gdbarch), regval);
}
- return RETURN_VALUE_REGISTER_CONVENTION;
+ return 1;
}
- /* All pointers live in r3. */
- if (TYPE_CODE (valtype) == TYPE_CODE_PTR
- || TYPE_CODE (valtype) == TYPE_CODE_REF)
+
+ /* Floats and doubles go in f1 .. f13. 32-bit floats are converted
+ to double first. */
+ if (TYPE_LENGTH (valtype) <= 8
+ && TYPE_CODE (valtype) == TYPE_CODE_FLT)
{
- /* All pointers live in r3. */
+ int regnum = tdep->ppc_fp0_regnum + 1 + index;
+ struct type *regtype = register_type (gdbarch, regnum);
+ gdb_byte regval[MAX_REGISTER_SIZE];
+
if (writebuf != NULL)
- regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 3, writebuf);
+ {
+ convert_typed_floating (writebuf, valtype, regval, regtype);
+ regcache_cooked_write (regcache, regnum, regval);
+ }
if (readbuf != NULL)
- regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 3, readbuf);
- return RETURN_VALUE_REGISTER_CONVENTION;
+ {
+ regcache_cooked_read (regcache, regnum, regval);
+ convert_typed_floating (regval, regtype, readbuf, valtype);
+ }
+ return 1;
}
- /* OpenCL vectors < 16 bytes are returned as distinct
- scalars in f1..f2 or r3..r10. */
- if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY
- && TYPE_VECTOR (valtype)
- && TYPE_LENGTH (valtype) < 16
- && opencl_abi)
- {
- struct type *eltype = check_typedef (TYPE_TARGET_TYPE (valtype));
- int i, nelt = TYPE_LENGTH (valtype) / TYPE_LENGTH (eltype);
- for (i = 0; i < nelt; i++)
- {
- int offset = i * TYPE_LENGTH (eltype);
+ /* Floats and doubles go in f1 .. f13. 32-bit decimal floats are
+ placed in the least significant word. */
+ if (TYPE_LENGTH (valtype) <= 8
+ && TYPE_CODE (valtype) == TYPE_CODE_DECFLOAT)
+ {
+ int regnum = tdep->ppc_fp0_regnum + 1 + index;
+ int offset = 8 - TYPE_LENGTH (valtype);
- if (TYPE_CODE (eltype) == TYPE_CODE_FLT)
- {
- int regnum = tdep->ppc_fp0_regnum + 1 + i;
- gdb_byte regval[MAX_REGISTER_SIZE];
- struct type *regtype = register_type (gdbarch, regnum);
+ if (writebuf != NULL)
+ regcache_cooked_write_part (regcache, regnum,
+ offset, TYPE_LENGTH (valtype), writebuf);
+ if (readbuf != NULL)
+ regcache_cooked_read_part (regcache, regnum,
+ offset, TYPE_LENGTH (valtype), readbuf);
+ return 1;
+ }
- if (writebuf != NULL)
- {
- convert_typed_floating (writebuf + offset, eltype,
- regval, regtype);
- regcache_cooked_write (regcache, regnum, regval);
- }
- if (readbuf != NULL)
- {
- regcache_cooked_read (regcache, regnum, regval);
- convert_typed_floating (regval, regtype,
- readbuf + offset, eltype);
- }
- }
- else
- {
- int regnum = tdep->ppc_gp0_regnum + 3 + i;
- ULONGEST regval;
+ /* IBM long double stored in two consecutive FPRs. */
+ if (TYPE_LENGTH (valtype) == 16
+ && TYPE_CODE (valtype) == TYPE_CODE_FLT
+ && (gdbarch_long_double_format (gdbarch)
+ == floatformats_ibm_long_double))
+ {
+ int regnum = tdep->ppc_fp0_regnum + 1 + 2 * index;
- if (writebuf != NULL)
- {
- regval = unpack_long (eltype, writebuf + offset);
- regcache_cooked_write_unsigned (regcache, regnum, regval);
- }
- if (readbuf != NULL)
- {
- regcache_cooked_read_unsigned (regcache, regnum, ®val);
- store_unsigned_integer (readbuf + offset,
- TYPE_LENGTH (eltype), byte_order,
- regval);
- }
- }
+ if (writebuf != NULL)
+ {
+ regcache_cooked_write (regcache, regnum, writebuf);
+ regcache_cooked_write (regcache, regnum + 1, writebuf + 8);
}
-
- return RETURN_VALUE_REGISTER_CONVENTION;
+ if (readbuf != NULL)
+ {
+ regcache_cooked_read (regcache, regnum, readbuf);
+ regcache_cooked_read (regcache, regnum + 1, readbuf + 8);
+ }
+ return 1;
}
- /* OpenCL vectors >= 16 bytes are returned in v2..v9. */
- if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY
- && TYPE_VECTOR (valtype)
- && TYPE_LENGTH (valtype) >= 16
- && opencl_abi)
+
+ /* 128-bit decimal floating-point values are stored in an even/odd
+ pair of FPRs, with the even FPR holding the most significant half. */
+ if (TYPE_LENGTH (valtype) == 16
+ && TYPE_CODE (valtype) == TYPE_CODE_DECFLOAT)
{
- int n_regs = TYPE_LENGTH (valtype) / 16;
- int i;
+ int regnum = tdep->ppc_fp0_regnum + 2 + 2 * index;
- for (i = 0; i < n_regs; i++)
+ if (writebuf != NULL)
{
- int offset = i * 16;
- int regnum = tdep->ppc_vr0_regnum + 2 + i;
-
- if (writebuf != NULL)
- regcache_cooked_write (regcache, regnum, writebuf + offset);
- if (readbuf != NULL)
- regcache_cooked_read (regcache, regnum, readbuf + offset);
+ regcache_cooked_write (regcache, regnum, writebuf);
+ regcache_cooked_write (regcache, regnum + 1, writebuf + 8);
}
-
- return RETURN_VALUE_REGISTER_CONVENTION;
+ if (readbuf != NULL)
+ {
+ regcache_cooked_read (regcache, regnum, readbuf);
+ regcache_cooked_read (regcache, regnum + 1, readbuf + 8);
+ }
+ return 1;
}
- /* Array type has more than one use. */
- if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY)
+
+ /* AltiVec vectors are returned in VRs starting at v2. */
+ if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY && TYPE_VECTOR (valtype)
+ && tdep->vector_abi == POWERPC_VEC_ALTIVEC)
{
- /* Small character arrays are returned, right justified, in r3. */
- if (TYPE_LENGTH (valtype) <= 8
- && TYPE_CODE (TYPE_TARGET_TYPE (valtype)) == TYPE_CODE_INT
- && TYPE_LENGTH (TYPE_TARGET_TYPE (valtype)) == 1)
- {
- int offset = (register_size (gdbarch, tdep->ppc_gp0_regnum + 3)
- - TYPE_LENGTH (valtype));
- if (writebuf != NULL)
- regcache_cooked_write_part (regcache, tdep->ppc_gp0_regnum + 3,
- offset, TYPE_LENGTH (valtype), writebuf);
- if (readbuf != NULL)
- regcache_cooked_read_part (regcache, tdep->ppc_gp0_regnum + 3,
- offset, TYPE_LENGTH (valtype), readbuf);
- return RETURN_VALUE_REGISTER_CONVENTION;
- }
- /* A VMX vector is returned in v2. */
- if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY
- && TYPE_VECTOR (valtype)
- && tdep->vector_abi == POWERPC_VEC_ALTIVEC)
- {
- if (readbuf)
- regcache_cooked_read (regcache, tdep->ppc_vr0_regnum + 2, readbuf);
- if (writebuf)
- regcache_cooked_write (regcache, tdep->ppc_vr0_regnum + 2,
- writebuf);
- return RETURN_VALUE_REGISTER_CONVENTION;
- }
+ int regnum = tdep->ppc_vr0_regnum + 2 + index;
+
+ if (writebuf != NULL)
+ regcache_cooked_write (regcache, regnum, writebuf);
+ if (readbuf != NULL)
+ regcache_cooked_read (regcache, regnum, readbuf);
+ return 1;
}
- /* Big floating point values get stored in adjacent floating
- point registers, starting with F1. */
- if (TYPE_CODE (valtype) == TYPE_CODE_FLT
- && (TYPE_LENGTH (valtype) == 16 || TYPE_LENGTH (valtype) == 32))
+
+ return 0;
+}
+
+/* The 64 bit ABI return value convention.
+
+ Return non-zero if the return-value is stored in a register, return
+ 0 if the return-value is instead stored on the stack (a.k.a.,
+ struct return convention).
+
+ For a return-value stored in a register: when WRITEBUF is non-NULL,
+ copy the buffer to the corresponding register return-value location
+ location; when READBUF is non-NULL, fill the buffer from the
+ corresponding register return-value location. */
+enum return_value_convention
+ppc64_sysv_abi_return_value (struct gdbarch *gdbarch, struct value *function,
+ struct type *valtype, struct regcache *regcache,
+ gdb_byte *readbuf, const gdb_byte *writebuf)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ struct type *func_type = function ? value_type (function) : NULL;
+ int opencl_abi = func_type? ppc_sysv_use_opencl_abi (func_type) : 0;
+ struct type *eltype;
+ int nelt, i, ok;
+
+ /* This function exists to support a calling convention that
+ requires floating-point registers. It shouldn't be used on
+ processors that lack them. */
+ gdb_assert (ppc_floating_point_unit_p (gdbarch));
+
+ /* Complex types are returned as if two independent scalars. */
+ if (TYPE_CODE (valtype) == TYPE_CODE_COMPLEX)
{
- if (writebuf || readbuf != NULL)
+ eltype = check_typedef (TYPE_TARGET_TYPE (valtype));
+
+ for (i = 0; i < 2; i++)
{
- int i;
- for (i = 0; i < TYPE_LENGTH (valtype) / 8; i++)
- {
- if (writebuf != NULL)
- regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 1 + i,
- (const bfd_byte *) writebuf + i * 8);
- if (readbuf != NULL)
- regcache_cooked_read (regcache, tdep->ppc_fp0_regnum + 1 + i,
- (bfd_byte *) readbuf + i * 8);
- }
+ ok = ppc64_sysv_abi_return_value_base (gdbarch, eltype, regcache,
+ readbuf, writebuf, i);
+ gdb_assert (ok);
+
+ if (readbuf)
+ readbuf += TYPE_LENGTH (eltype);
+ if (writebuf)
+ writebuf += TYPE_LENGTH (eltype);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
- /* Complex values get returned in f1:f2, need to convert. */
- if (TYPE_CODE (valtype) == TYPE_CODE_COMPLEX
- && (TYPE_LENGTH (valtype) == 8 || TYPE_LENGTH (valtype) == 16))
+
+ /* OpenCL vectors shorter than 16 bytes are returned as if
+ a series of independent scalars; OpenCL vectors 16 bytes
+ or longer are returned as if a series of AltiVec vectors. */
+ if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY && TYPE_VECTOR (valtype)
+ && opencl_abi)
{
- if (regcache != NULL)
+ if (TYPE_LENGTH (valtype) < 16)
+ eltype = check_typedef (TYPE_TARGET_TYPE (valtype));
+ else
+ eltype = register_type (gdbarch, tdep->ppc_vr0_regnum);
+
+ nelt = TYPE_LENGTH (valtype) / TYPE_LENGTH (eltype);
+ for (i = 0; i < nelt; i++)
{
- int i;
- for (i = 0; i < 2; i++)
- {
- gdb_byte regval[MAX_REGISTER_SIZE];
- struct type *regtype =
- register_type (gdbarch, tdep->ppc_fp0_regnum);
- struct type *target_type;
- target_type = check_typedef (TYPE_TARGET_TYPE (valtype));
- if (writebuf != NULL)
- {
- convert_typed_floating ((const bfd_byte *) writebuf +
- i * TYPE_LENGTH (target_type),
- target_type, regval, regtype);
- regcache_cooked_write (regcache,
- tdep->ppc_fp0_regnum + 1 + i,
- regval);
- }
- if (readbuf != NULL)
- {
- regcache_cooked_read (regcache,
- tdep->ppc_fp0_regnum + 1 + i,
- regval);
- convert_typed_floating (regval, regtype,
- (bfd_byte *) readbuf +
- i * TYPE_LENGTH (target_type),
- target_type);
- }
- }
+ ok = ppc64_sysv_abi_return_value_base (gdbarch, eltype, regcache,
+ readbuf, writebuf, i);
+ gdb_assert (ok);
+
+ if (readbuf)
+ readbuf += TYPE_LENGTH (eltype);
+ if (writebuf)
+ writebuf += TYPE_LENGTH (eltype);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
- /* Big complex values get stored in f1:f4. */
- if (TYPE_CODE (valtype) == TYPE_CODE_COMPLEX && TYPE_LENGTH (valtype) == 32)
+
+ /* All pointers live in r3. */
+ if (TYPE_CODE (valtype) == TYPE_CODE_PTR
+ || TYPE_CODE (valtype) == TYPE_CODE_REF)
{
- if (regcache != NULL)
- {
- int i;
- for (i = 0; i < 4; i++)
- {
- if (writebuf != NULL)
- regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 1 + i,
- (const bfd_byte *) writebuf + i * 8);
- if (readbuf != NULL)
- regcache_cooked_read (regcache, tdep->ppc_fp0_regnum + 1 + i,
- (bfd_byte *) readbuf + i * 8);
- }
- }
+ int regnum = tdep->ppc_gp0_regnum + 3;
+
+ if (writebuf != NULL)
+ regcache_cooked_write (regcache, regnum, writebuf);
+ if (readbuf != NULL)
+ regcache_cooked_read (regcache, regnum, readbuf);
return RETURN_VALUE_REGISTER_CONVENTION;
}
+
+ /* Small character arrays are returned, right justified, in r3. */
+ if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY
+ && TYPE_LENGTH (valtype) <= 8
+ && TYPE_CODE (TYPE_TARGET_TYPE (valtype)) == TYPE_CODE_INT
+ && TYPE_LENGTH (TYPE_TARGET_TYPE (valtype)) == 1)
+ {
+ int regnum = tdep->ppc_gp0_regnum + 3;
+ int offset = (register_size (gdbarch, regnum) - TYPE_LENGTH (valtype));
+
+ if (writebuf != NULL)
+ regcache_cooked_write_part (regcache, regnum,
+ offset, TYPE_LENGTH (valtype), writebuf);
+ if (readbuf != NULL)
+ regcache_cooked_read_part (regcache, regnum,
+ offset, TYPE_LENGTH (valtype), readbuf);
+ return RETURN_VALUE_REGISTER_CONVENTION;
+ }
+
+ /* Handle plain base types. */
+ if (ppc64_sysv_abi_return_value_base (gdbarch, valtype, regcache,
+ readbuf, writebuf, 0))
+ return RETURN_VALUE_REGISTER_CONVENTION;
+
return RETURN_VALUE_STRUCT_CONVENTION;
}
projects / binutils-gdb.git / commitdiff