/* Target-dependent code for PowerPC systems using the SVR4 ABI
for GDB, the GNU debugger.
- Copyright (C) 2000, 2001, 2002, 2003, 2005, 2007, 2008
- Free Software Foundation, Inc.
+ Copyright (C) 2000-2020 Free Software Foundation, Inc.
This file is part of GDB.
#include "inferior.h"
#include "regcache.h"
#include "value.h"
-#include "gdb_string.h"
-#include "gdb_assert.h"
#include "ppc-tdep.h"
#include "target.h"
#include "objfiles.h"
#include "infcall.h"
+#include "dwarf2.h"
+#include "target-float.h"
+#include <algorithm>
-/* Pass the arguments in either registers, or in the stack. Using the
+
+/* Check whether FTPYE is a (pointer to) function type that should use
+ the OpenCL vector ABI. */
+
+static int
+ppc_sysv_use_opencl_abi (struct type *ftype)
+{
+ ftype = check_typedef (ftype);
+
+ if (ftype->code () == TYPE_CODE_PTR)
+ ftype = check_typedef (TYPE_TARGET_TYPE (ftype));
+
+ return (ftype->code () == TYPE_CODE_FUNC
+ && TYPE_CALLING_CONVENTION (ftype) == DW_CC_GDB_IBM_OpenCL);
+}
+
+/* Pass the arguments in either registers, or in the stack. Using the
ppc sysv ABI, the first eight words of the argument list (that might
be less than eight parameters if some parameters occupy more than one
word) are passed in r3..r10 registers. float and double parameters are
- passed in fpr's, in addition to that. Rest of the parameters if any
- are passed in user stack.
+ passed in fpr's, in addition to that. Rest of the parameters if any
+ are passed in user stack.
If the function is returning a structure, then the return address is passed
- in r3, then the first 7 words of the parametes can be passed in registers,
- starting from r4. */
+ in r3, then the first 7 words of the parameters can be passed in registers,
+ starting from r4. */
CORE_ADDR
ppc_sysv_abi_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
struct regcache *regcache, CORE_ADDR bp_addr,
int nargs, struct value **args, CORE_ADDR sp,
- int struct_return, CORE_ADDR struct_addr)
+ function_call_return_method return_method,
+ CORE_ADDR struct_addr)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ int opencl_abi = ppc_sysv_use_opencl_abi (value_type (function));
ULONGEST saved_sp;
int argspace = 0; /* 0 is an initial wrong guess. */
int write_pass;
(which will be passed in r3) is used for struct return
address. In that case we should advance one word and start
from r4 register to copy parameters. */
- if (struct_return)
+ if (return_method == return_method_struct)
{
if (write_pass)
regcache_cooked_write_signed (regcache,
int len = TYPE_LENGTH (type);
const bfd_byte *val = value_contents (arg);
- if (TYPE_CODE (type) == TYPE_CODE_FLT && len <= 8
+ if (type->code () == TYPE_CODE_FLT && len <= 8
&& !tdep->soft_float)
{
/* Floating point value converted to "double" then
{
/* Always store the floating point value using
the register's floating-point format. */
- gdb_byte regval[MAX_REGISTER_SIZE];
+ gdb_byte regval[PPC_MAX_REGISTER_SIZE];
struct type *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);
+ target_float_convert (val, type, regval, regtype);
+ regcache->cooked_write (tdep->ppc_fp0_regnum + freg,
+ regval);
}
freg++;
}
argoffset += len;
}
}
- else if (TYPE_CODE (type) == TYPE_CODE_FLT
+ else if (type->code () == TYPE_CODE_FLT
&& len == 16
&& !tdep->soft_float
&& (gdbarch_long_double_format (gdbarch)
{
if (write_pass)
{
- regcache_cooked_write (regcache,
- tdep->ppc_fp0_regnum + freg,
- val);
- regcache_cooked_write (regcache,
- tdep->ppc_fp0_regnum + freg + 1,
- val + 8);
+ regcache->cooked_write (tdep->ppc_fp0_regnum + freg, val);
+ regcache->cooked_write (tdep->ppc_fp0_regnum + freg + 1,
+ val + 8);
}
freg += 2;
}
}
}
else if (len == 8
- && (TYPE_CODE (type) == TYPE_CODE_INT /* long long */
- || TYPE_CODE (type) == TYPE_CODE_FLT)) /* double */
+ && (type->code () == TYPE_CODE_INT /* long long */
+ || type->code () == TYPE_CODE_FLT /* double */
+ || (type->code () == TYPE_CODE_DECFLOAT
+ && tdep->soft_float)))
{
- /* "long long" or soft-float "double" passed in an odd/even
- register pair with the low addressed word in the odd
- register and the high addressed word in the even
- register, or when the registers run out an 8 byte
- aligned stack location. */
+ /* "long long" or soft-float "double" or "_Decimal64"
+ passed in an odd/even register pair with the low
+ addressed word in the odd register and the high
+ addressed word in the even register, or when the
+ registers run out an 8 byte aligned stack
+ location. */
if (greg > 9)
{
/* Just in case GREG was 10. */
greg++;
if (write_pass)
{
- regcache_cooked_write (regcache,
- tdep->ppc_gp0_regnum + greg + 0,
- val + 0);
- regcache_cooked_write (regcache,
- tdep->ppc_gp0_regnum + greg + 1,
- val + 4);
+ regcache->cooked_write (tdep->ppc_gp0_regnum + greg + 0,
+ val + 0);
+ regcache->cooked_write (tdep->ppc_gp0_regnum + greg + 1,
+ val + 4);
}
greg += 2;
}
}
- else if (len == 16 && TYPE_CODE (type) == TYPE_CODE_FLT
- && (gdbarch_long_double_format (gdbarch)
- == floatformats_ibm_long_double))
+ else if (len == 16
+ && ((type->code () == TYPE_CODE_FLT
+ && (gdbarch_long_double_format (gdbarch)
+ == floatformats_ibm_long_double))
+ || (type->code () == TYPE_CODE_DECFLOAT
+ && tdep->soft_float)))
{
- /* Soft-float IBM long double passed in four consecutive
- registers, or on the stack. The registers are not
- necessarily odd/even pairs. */
+ /* Soft-float IBM long double or _Decimal128 passed in
+ four consecutive registers, or on the stack. The
+ registers are not necessarily odd/even pairs. */
if (greg > 7)
{
greg = 11;
{
if (write_pass)
{
- regcache_cooked_write (regcache,
- tdep->ppc_gp0_regnum + greg + 0,
- val + 0);
- regcache_cooked_write (regcache,
- tdep->ppc_gp0_regnum + greg + 1,
- val + 4);
- regcache_cooked_write (regcache,
- tdep->ppc_gp0_regnum + greg + 2,
- val + 8);
- regcache_cooked_write (regcache,
- tdep->ppc_gp0_regnum + greg + 3,
- val + 12);
+ regcache->cooked_write (tdep->ppc_gp0_regnum + greg + 0,
+ val + 0);
+ regcache->cooked_write (tdep->ppc_gp0_regnum + greg + 1,
+ val + 4);
+ regcache->cooked_write (tdep->ppc_gp0_regnum + greg + 2,
+ val + 8);
+ regcache->cooked_write (tdep->ppc_gp0_regnum + greg + 3,
+ val + 12);
}
greg += 4;
}
}
- else if (TYPE_CODE (type) == TYPE_CODE_DECFLOAT && len <= 8
+ else if (type->code () == TYPE_CODE_DECFLOAT && len <= 8
&& !tdep->soft_float)
{
/* 32-bit and 64-bit decimal floats go in f1 .. f8. They can
{
if (write_pass)
{
- gdb_byte regval[MAX_REGISTER_SIZE];
+ gdb_byte regval[PPC_MAX_REGISTER_SIZE];
const gdb_byte *p;
/* 32-bit decimal floats are right aligned in the
else
p = val;
- regcache_cooked_write (regcache,
- tdep->ppc_fp0_regnum + freg, p);
+ regcache->cooked_write (tdep->ppc_fp0_regnum + freg, p);
}
freg++;
argoffset += len;
}
}
- else if (TYPE_CODE (type) == TYPE_CODE_DECFLOAT && len == 16
+ else if (type->code () == TYPE_CODE_DECFLOAT && len == 16
&& !tdep->soft_float)
{
/* 128-bit decimal floats go in f2 .. f7, always in even/odd
if (write_pass)
{
- regcache_cooked_write (regcache,
- tdep->ppc_fp0_regnum + freg, val);
- regcache_cooked_write (regcache,
- tdep->ppc_fp0_regnum + freg + 1, val + 8);
+ regcache->cooked_write (tdep->ppc_fp0_regnum + freg, val);
+ regcache->cooked_write (tdep->ppc_fp0_regnum + freg + 1,
+ val + 8);
}
}
else
Hence we increase freg even when writing to memory. */
freg += 2;
}
+ else if (len < 16
+ && type->code () == 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);
+
+ for (i = 0; i < nelt; i++)
+ {
+ const gdb_byte *elval = val + i * TYPE_LENGTH (eltype);
+
+ if (eltype->code () == TYPE_CODE_FLT && !tdep->soft_float)
+ {
+ if (freg <= 8)
+ {
+ if (write_pass)
+ {
+ int regnum = tdep->ppc_fp0_regnum + freg;
+ gdb_byte regval[PPC_MAX_REGISTER_SIZE];
+ struct type *regtype
+ = register_type (gdbarch, regnum);
+ target_float_convert (elval, eltype,
+ regval, regtype);
+ regcache->cooked_write (regnum, regval);
+ }
+ freg++;
+ }
+ else
+ {
+ argoffset = align_up (argoffset, len);
+ if (write_pass)
+ write_memory (sp + argoffset, val, len);
+ argoffset += len;
+ }
+ }
+ else if (TYPE_LENGTH (eltype) == 8)
+ {
+ if (greg > 9)
+ {
+ /* Just in case GREG was 10. */
+ greg = 11;
+ argoffset = align_up (argoffset, 8);
+ if (write_pass)
+ write_memory (sp + argoffset, elval,
+ TYPE_LENGTH (eltype));
+ argoffset += 8;
+ }
+ else
+ {
+ /* Must start on an odd register - r3/r4 etc. */
+ if ((greg & 1) == 0)
+ greg++;
+ if (write_pass)
+ {
+ int regnum = tdep->ppc_gp0_regnum + greg;
+ regcache->cooked_write (regnum + 0, elval + 0);
+ regcache->cooked_write (regnum + 1, elval + 4);
+ }
+ greg += 2;
+ }
+ }
+ else
+ {
+ gdb_byte word[PPC_MAX_REGISTER_SIZE];
+ store_unsigned_integer (word, tdep->wordsize, byte_order,
+ unpack_long (eltype, elval));
+
+ if (greg <= 10)
+ {
+ if (write_pass)
+ regcache->cooked_write (tdep->ppc_gp0_regnum + greg,
+ word);
+ greg++;
+ }
+ else
+ {
+ argoffset = align_up (argoffset, tdep->wordsize);
+ if (write_pass)
+ write_memory (sp + argoffset, word, tdep->wordsize);
+ argoffset += tdep->wordsize;
+ }
+ }
+ }
+ }
+ else if (len >= 16
+ && type->code () == 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 < len / 16; i++)
+ {
+ const gdb_byte *elval = val + i * 16;
+
+ if (vreg <= 13)
+ {
+ if (write_pass)
+ regcache->cooked_write (tdep->ppc_vr0_regnum + vreg,
+ elval);
+ vreg++;
+ }
+ else
+ {
+ argoffset = align_up (argoffset, 16);
+ if (write_pass)
+ write_memory (sp + argoffset, elval, 16);
+ argoffset += 16;
+ }
+ }
+ }
else if (len == 16
- && TYPE_CODE (type) == TYPE_CODE_ARRAY
+ && type->code () == TYPE_CODE_ARRAY
&& TYPE_VECTOR (type)
&& tdep->vector_abi == POWERPC_VEC_ALTIVEC)
{
if (vreg <= 13)
{
if (write_pass)
- regcache_cooked_write (regcache,
- tdep->ppc_vr0_regnum + vreg, val);
+ regcache->cooked_write (tdep->ppc_vr0_regnum + vreg, val);
vreg++;
}
else
}
}
else if (len == 8
- && TYPE_CODE (type) == TYPE_CODE_ARRAY
+ && type->code () == TYPE_CODE_ARRAY
&& TYPE_VECTOR (type)
&& tdep->vector_abi == POWERPC_VEC_SPE)
{
if (greg <= 10)
{
if (write_pass)
- regcache_cooked_write (regcache,
- tdep->ppc_ev0_regnum + greg, val);
+ regcache->cooked_write (tdep->ppc_ev0_regnum + greg, val);
greg++;
}
else
{
/* Reduce the parameter down to something that fits in a
"word". */
- gdb_byte word[MAX_REGISTER_SIZE];
- memset (word, 0, MAX_REGISTER_SIZE);
+ gdb_byte word[PPC_MAX_REGISTER_SIZE];
+ memset (word, 0, PPC_MAX_REGISTER_SIZE);
if (len > tdep->wordsize
- || TYPE_CODE (type) == TYPE_CODE_STRUCT
- || TYPE_CODE (type) == TYPE_CODE_UNION)
+ || type->code () == TYPE_CODE_STRUCT
+ || type->code () == TYPE_CODE_UNION)
{
/* Structs and large values are put in an
- aligned stack slot ... */
- if (TYPE_CODE (type) == TYPE_CODE_ARRAY
+ aligned stack slot ... */
+ if (type->code () == TYPE_CODE_ARRAY
&& TYPE_VECTOR (type)
&& len >= 16)
structoffset = align_up (structoffset, 16);
write_memory (sp + structoffset, val, len);
/* ... and then a "word" pointing to that address is
passed as the parameter. */
- store_unsigned_integer (word, tdep->wordsize,
+ store_unsigned_integer (word, tdep->wordsize, byte_order,
sp + structoffset);
structoffset += len;
}
- else if (TYPE_CODE (type) == TYPE_CODE_INT)
+ else if (type->code () == TYPE_CODE_INT)
/* Sign or zero extend the "int" into a "word". */
- store_unsigned_integer (word, tdep->wordsize,
+ store_unsigned_integer (word, tdep->wordsize, byte_order,
unpack_long (type, val));
else
/* Always goes in the low address. */
if (greg <= 10)
{
if (write_pass)
- regcache_cooked_write (regcache,
- tdep->ppc_gp0_regnum + greg, word);
+ regcache->cooked_write (tdep->ppc_gp0_regnum + greg, word);
greg++;
}
else
/* The psABI says that "A caller of a function that takes a
variable argument list shall set condition register bit 6 to
1 if it passes one or more arguments in the floating-point
- registers. It is strongly recommended that the caller set the
+ registers. It is strongly recommended that the caller set the
bit to 0 otherwise..." Doing this for normal functions too
shouldn't hurt. */
if (write_pass)
regcache_cooked_write_signed (regcache, gdbarch_sp_regnum (gdbarch), sp);
/* Write the backchain (it occupies WORDSIZED bytes). */
- write_memory_signed_integer (sp, tdep->wordsize, saved_sp);
+ write_memory_signed_integer (sp, tdep->wordsize, byte_order, saved_sp);
/* Point the inferior function call's return address at the dummy's
breakpoint. */
return sp;
}
-/* Handle the return-value conventions for Decimal Floating Point values
- in both ppc32 and ppc64, which are the same. */
-static int
+/* Handle the return-value conventions for Decimal Floating Point values. */
+static enum return_value_convention
get_decimal_float_return_value (struct gdbarch *gdbarch, struct type *valtype,
struct regcache *regcache, gdb_byte *readbuf,
const gdb_byte *writebuf)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- gdb_assert (TYPE_CODE (valtype) == TYPE_CODE_DECFLOAT);
+ gdb_assert (valtype->code () == TYPE_CODE_DECFLOAT);
/* 32-bit and 64-bit decimal floats in f1. */
if (TYPE_LENGTH (valtype) <= 8)
{
if (writebuf != NULL)
{
- gdb_byte regval[MAX_REGISTER_SIZE];
+ gdb_byte regval[PPC_MAX_REGISTER_SIZE];
const gdb_byte *p;
/* 32-bit decimal float is right aligned in the doubleword. */
else
p = writebuf;
- regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 1, p);
+ regcache->cooked_write (tdep->ppc_fp0_regnum + 1, p);
}
if (readbuf != NULL)
{
- regcache_cooked_read (regcache, tdep->ppc_fp0_regnum + 1, readbuf);
+ regcache->cooked_read (tdep->ppc_fp0_regnum + 1, readbuf);
/* Left align 32-bit decimal float. */
if (TYPE_LENGTH (valtype) == 4)
for (i = 0; i < 2; i++)
{
if (writebuf != NULL)
- regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 2 + i,
- writebuf + i * 8);
+ regcache->cooked_write (tdep->ppc_fp0_regnum + 2 + i,
+ writebuf + i * 8);
if (readbuf != NULL)
- regcache_cooked_read (regcache, tdep->ppc_fp0_regnum + 2 + i,
- readbuf + i * 8);
+ regcache->cooked_read (tdep->ppc_fp0_regnum + 2 + i,
+ readbuf + i * 8);
}
}
}
else
/* Can't happen. */
- internal_error (__FILE__, __LINE__, "Unknown decimal float size.");
+ internal_error (__FILE__, __LINE__, _("Unknown decimal float size."));
return RETURN_VALUE_REGISTER_CONVENTION;
}
when returned in general-purpose registers. */
static enum return_value_convention
-do_ppc_sysv_return_value (struct gdbarch *gdbarch, struct type *type,
- struct regcache *regcache, gdb_byte *readbuf,
- const gdb_byte *writebuf, int broken_gcc)
+do_ppc_sysv_return_value (struct gdbarch *gdbarch, struct type *func_type,
+ struct type *type, struct regcache *regcache,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ int broken_gcc)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ int opencl_abi = func_type? ppc_sysv_use_opencl_abi (func_type) : 0;
+
gdb_assert (tdep->wordsize == 4);
- if (TYPE_CODE (type) == TYPE_CODE_FLT
+
+ if (type->code () == TYPE_CODE_FLT
&& TYPE_LENGTH (type) <= 8
&& !tdep->soft_float)
{
{
/* Floats and doubles stored in "f1". Convert the value to
the required type. */
- gdb_byte regval[MAX_REGISTER_SIZE];
+ gdb_byte regval[PPC_MAX_REGISTER_SIZE];
struct type *regtype = register_type (gdbarch,
tdep->ppc_fp0_regnum + 1);
- regcache_cooked_read (regcache, tdep->ppc_fp0_regnum + 1, regval);
- convert_typed_floating (regval, regtype, readbuf, type);
+ regcache->cooked_read (tdep->ppc_fp0_regnum + 1, regval);
+ target_float_convert (regval, regtype, readbuf, type);
}
if (writebuf)
{
/* Floats and doubles stored in "f1". Convert the value to
the register's "double" type. */
- gdb_byte regval[MAX_REGISTER_SIZE];
+ gdb_byte regval[PPC_MAX_REGISTER_SIZE];
struct type *regtype = register_type (gdbarch, tdep->ppc_fp0_regnum);
- convert_typed_floating (writebuf, type, regval, regtype);
- regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 1, regval);
+ target_float_convert (writebuf, type, regval, regtype);
+ regcache->cooked_write (tdep->ppc_fp0_regnum + 1, regval);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
- if (TYPE_CODE (type) == TYPE_CODE_FLT
+ if (type->code () == TYPE_CODE_FLT
&& TYPE_LENGTH (type) == 16
&& !tdep->soft_float
- && (gdbarch_long_double_format (gdbarch) == floatformats_ibm_long_double))
+ && (gdbarch_long_double_format (gdbarch)
+ == floatformats_ibm_long_double))
{
/* IBM long double stored in f1 and f2. */
if (readbuf)
{
- regcache_cooked_read (regcache, tdep->ppc_fp0_regnum + 1, readbuf);
- regcache_cooked_read (regcache, tdep->ppc_fp0_regnum + 2,
- readbuf + 8);
+ regcache->cooked_read (tdep->ppc_fp0_regnum + 1, readbuf);
+ regcache->cooked_read (tdep->ppc_fp0_regnum + 2, readbuf + 8);
}
if (writebuf)
{
- regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 1, writebuf);
- regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 2,
- writebuf + 8);
+ regcache->cooked_write (tdep->ppc_fp0_regnum + 1, writebuf);
+ regcache->cooked_write (tdep->ppc_fp0_regnum + 2, writebuf + 8);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
- if (TYPE_CODE (type) == TYPE_CODE_FLT
- && TYPE_LENGTH (type) == 16
- && (gdbarch_long_double_format (gdbarch) == floatformats_ibm_long_double))
+ if (TYPE_LENGTH (type) == 16
+ && ((type->code () == TYPE_CODE_FLT
+ && (gdbarch_long_double_format (gdbarch)
+ == floatformats_ibm_long_double))
+ || (type->code () == TYPE_CODE_DECFLOAT && tdep->soft_float)))
{
- /* Soft-float IBM long double stored in r3, r4, r5, r6. */
+ /* Soft-float IBM long double or _Decimal128 stored in r3, r4,
+ r5, r6. */
if (readbuf)
{
- regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 3, readbuf);
- regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 4,
- readbuf + 4);
- regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 5,
- readbuf + 8);
- regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 6,
- readbuf + 12);
+ regcache->cooked_read (tdep->ppc_gp0_regnum + 3, readbuf);
+ regcache->cooked_read (tdep->ppc_gp0_regnum + 4, readbuf + 4);
+ regcache->cooked_read (tdep->ppc_gp0_regnum + 5, readbuf + 8);
+ regcache->cooked_read (tdep->ppc_gp0_regnum + 6, readbuf + 12);
}
if (writebuf)
{
- regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 3, writebuf);
- regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 4,
- writebuf + 4);
- regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 5,
- writebuf + 8);
- regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 6,
- writebuf + 12);
+ regcache->cooked_write (tdep->ppc_gp0_regnum + 3, writebuf);
+ regcache->cooked_write (tdep->ppc_gp0_regnum + 4, writebuf + 4);
+ regcache->cooked_write (tdep->ppc_gp0_regnum + 5, writebuf + 8);
+ regcache->cooked_write (tdep->ppc_gp0_regnum + 6, writebuf + 12);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
- if ((TYPE_CODE (type) == TYPE_CODE_INT && TYPE_LENGTH (type) == 8)
- || (TYPE_CODE (type) == TYPE_CODE_FLT && TYPE_LENGTH (type) == 8))
+ if ((type->code () == TYPE_CODE_INT && TYPE_LENGTH (type) == 8)
+ || (type->code () == TYPE_CODE_FLT && TYPE_LENGTH (type) == 8)
+ || (type->code () == TYPE_CODE_DECFLOAT && TYPE_LENGTH (type) == 8
+ && tdep->soft_float))
{
if (readbuf)
{
- /* A long long, or a double stored in the 32 bit r3/r4. */
- regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 3,
- readbuf + 0);
- regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 4,
- readbuf + 4);
+ /* A long long, double or _Decimal64 stored in the 32 bit
+ r3/r4. */
+ regcache->cooked_read (tdep->ppc_gp0_regnum + 3, readbuf + 0);
+ regcache->cooked_read (tdep->ppc_gp0_regnum + 4, readbuf + 4);
}
if (writebuf)
{
- /* A long long, or a double stored in the 32 bit r3/r4. */
- regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 3,
- writebuf + 0);
- regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 4,
- writebuf + 4);
+ /* A long long, double or _Decimal64 stored in the 32 bit
+ r3/r4. */
+ regcache->cooked_write (tdep->ppc_gp0_regnum + 3, writebuf + 0);
+ regcache->cooked_write (tdep->ppc_gp0_regnum + 4, writebuf + 4);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
- if (TYPE_CODE (type) == TYPE_CODE_DECFLOAT && !tdep->soft_float)
+ if (type->code () == TYPE_CODE_DECFLOAT && !tdep->soft_float)
return get_decimal_float_return_value (gdbarch, type, regcache, readbuf,
writebuf);
- else if ((TYPE_CODE (type) == TYPE_CODE_INT
- || TYPE_CODE (type) == TYPE_CODE_CHAR
- || TYPE_CODE (type) == TYPE_CODE_BOOL
- || TYPE_CODE (type) == TYPE_CODE_PTR
- || TYPE_CODE (type) == TYPE_CODE_REF
- || TYPE_CODE (type) == TYPE_CODE_ENUM)
+ else if ((type->code () == TYPE_CODE_INT
+ || type->code () == TYPE_CODE_CHAR
+ || type->code () == TYPE_CODE_BOOL
+ || type->code () == TYPE_CODE_PTR
+ || TYPE_IS_REFERENCE (type)
+ || type->code () == TYPE_CODE_ENUM)
&& TYPE_LENGTH (type) <= tdep->wordsize)
{
if (readbuf)
ULONGEST regval;
regcache_cooked_read_unsigned (regcache, tdep->ppc_gp0_regnum + 3,
®val);
- store_unsigned_integer (readbuf, TYPE_LENGTH (type), regval);
+ store_unsigned_integer (readbuf, TYPE_LENGTH (type), byte_order,
+ regval);
}
if (writebuf)
{
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
+ /* OpenCL vectors < 16 bytes are returned as distinct
+ scalars in f1..f2 or r3..r10. */
+ if (type->code () == TYPE_CODE_ARRAY
+ && TYPE_VECTOR (type)
+ && TYPE_LENGTH (type) < 16
+ && opencl_abi)
+ {
+ struct type *eltype = check_typedef (TYPE_TARGET_TYPE (type));
+ int i, nelt = TYPE_LENGTH (type) / TYPE_LENGTH (eltype);
+
+ for (i = 0; i < nelt; i++)
+ {
+ int offset = i * TYPE_LENGTH (eltype);
+
+ if (eltype->code () == TYPE_CODE_FLT)
+ {
+ int regnum = tdep->ppc_fp0_regnum + 1 + i;
+ gdb_byte regval[PPC_MAX_REGISTER_SIZE];
+ struct type *regtype = register_type (gdbarch, regnum);
+
+ if (writebuf != NULL)
+ {
+ target_float_convert (writebuf + offset, eltype,
+ regval, regtype);
+ regcache->cooked_write (regnum, regval);
+ }
+ if (readbuf != NULL)
+ {
+ regcache->cooked_read (regnum, regval);
+ target_float_convert (regval, regtype,
+ readbuf + offset, eltype);
+ }
+ }
+ else
+ {
+ int regnum = tdep->ppc_gp0_regnum + 3 + i;
+ ULONGEST regval;
+
+ 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);
+ }
+ }
+ }
+
+ return RETURN_VALUE_REGISTER_CONVENTION;
+ }
+ /* OpenCL vectors >= 16 bytes are returned in v2..v9. */
+ if (type->code () == TYPE_CODE_ARRAY
+ && TYPE_VECTOR (type)
+ && TYPE_LENGTH (type) >= 16
+ && opencl_abi)
+ {
+ int n_regs = TYPE_LENGTH (type) / 16;
+ int i;
+
+ for (i = 0; i < n_regs; i++)
+ {
+ int offset = i * 16;
+ int regnum = tdep->ppc_vr0_regnum + 2 + i;
+
+ if (writebuf != NULL)
+ regcache->cooked_write (regnum, writebuf + offset);
+ if (readbuf != NULL)
+ regcache->cooked_read (regnum, readbuf + offset);
+ }
+
+ return RETURN_VALUE_REGISTER_CONVENTION;
+ }
if (TYPE_LENGTH (type) == 16
- && TYPE_CODE (type) == TYPE_CODE_ARRAY
+ && type->code () == TYPE_CODE_ARRAY
&& TYPE_VECTOR (type)
&& tdep->vector_abi == POWERPC_VEC_ALTIVEC)
{
if (readbuf)
{
/* Altivec places the return value in "v2". */
- regcache_cooked_read (regcache, tdep->ppc_vr0_regnum + 2, readbuf);
+ regcache->cooked_read (tdep->ppc_vr0_regnum + 2, readbuf);
}
if (writebuf)
{
/* Altivec places the return value in "v2". */
- regcache_cooked_write (regcache, tdep->ppc_vr0_regnum + 2, writebuf);
+ regcache->cooked_write (tdep->ppc_vr0_regnum + 2, writebuf);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
if (TYPE_LENGTH (type) == 16
- && TYPE_CODE (type) == TYPE_CODE_ARRAY
+ && type->code () == TYPE_CODE_ARRAY
&& TYPE_VECTOR (type)
&& tdep->vector_abi == POWERPC_VEC_GENERIC)
{
ABI risks in that case; we don't try to support it. */
if (readbuf)
{
- regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 3,
- readbuf + 0);
- regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 4,
- readbuf + 4);
- regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 5,
- readbuf + 8);
- regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 6,
- readbuf + 12);
+ regcache->cooked_read (tdep->ppc_gp0_regnum + 3, readbuf + 0);
+ regcache->cooked_read (tdep->ppc_gp0_regnum + 4, readbuf + 4);
+ regcache->cooked_read (tdep->ppc_gp0_regnum + 5, readbuf + 8);
+ regcache->cooked_read (tdep->ppc_gp0_regnum + 6, readbuf + 12);
}
if (writebuf)
{
- regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 3,
- writebuf + 0);
- regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 4,
- writebuf + 4);
- regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 5,
- writebuf + 8);
- regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 6,
- writebuf + 12);
+ regcache->cooked_write (tdep->ppc_gp0_regnum + 3, writebuf + 0);
+ regcache->cooked_write (tdep->ppc_gp0_regnum + 4, writebuf + 4);
+ regcache->cooked_write (tdep->ppc_gp0_regnum + 5, writebuf + 8);
+ regcache->cooked_write (tdep->ppc_gp0_regnum + 6, writebuf + 12);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
if (TYPE_LENGTH (type) == 8
- && TYPE_CODE (type) == TYPE_CODE_ARRAY
+ && type->code () == TYPE_CODE_ARRAY
&& TYPE_VECTOR (type)
&& tdep->vector_abi == POWERPC_VEC_SPE)
{
only corresponds to the least significant 32-bits. So place
the 64-bit DSP type's value in ev3. */
if (readbuf)
- regcache_cooked_read (regcache, tdep->ppc_ev0_regnum + 3, readbuf);
+ regcache->cooked_read (tdep->ppc_ev0_regnum + 3, readbuf);
if (writebuf)
- regcache_cooked_write (regcache, tdep->ppc_ev0_regnum + 3, writebuf);
+ regcache->cooked_write (tdep->ppc_ev0_regnum + 3, writebuf);
return RETURN_VALUE_REGISTER_CONVENTION;
}
if (broken_gcc && TYPE_LENGTH (type) <= 8)
/* GCC screwed up for structures or unions whose size is less
than or equal to 8 bytes.. Instead of left-aligning, it
right-aligns the data into the buffer formed by r3, r4. */
- gdb_byte regvals[MAX_REGISTER_SIZE * 2];
+ gdb_byte regvals[PPC_MAX_REGISTER_SIZE * 2];
int len = TYPE_LENGTH (type);
int offset = (2 * tdep->wordsize - len) % tdep->wordsize;
if (readbuf)
{
- regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 3,
- regvals + 0 * tdep->wordsize);
+ regcache->cooked_read (tdep->ppc_gp0_regnum + 3,
+ regvals + 0 * tdep->wordsize);
if (len > tdep->wordsize)
- regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 4,
- regvals + 1 * tdep->wordsize);
+ regcache->cooked_read (tdep->ppc_gp0_regnum + 4,
+ regvals + 1 * tdep->wordsize);
memcpy (readbuf, regvals + offset, len);
}
if (writebuf)
{
memset (regvals, 0, sizeof regvals);
memcpy (regvals + offset, writebuf, len);
- regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 3,
- regvals + 0 * tdep->wordsize);
+ regcache->cooked_write (tdep->ppc_gp0_regnum + 3,
+ regvals + 0 * tdep->wordsize);
if (len > tdep->wordsize)
- regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 4,
- regvals + 1 * tdep->wordsize);
+ regcache->cooked_write (tdep->ppc_gp0_regnum + 4,
+ regvals + 1 * tdep->wordsize);
}
return RETURN_VALUE_REGISTER_CONVENTION;
/* This matches SVr4 PPC, it does not match GCC. */
/* The value is right-padded to 8 bytes and then loaded, as
two "words", into r3/r4. */
- gdb_byte regvals[MAX_REGISTER_SIZE * 2];
- regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 3,
- regvals + 0 * tdep->wordsize);
+ gdb_byte regvals[PPC_MAX_REGISTER_SIZE * 2];
+ regcache->cooked_read (tdep->ppc_gp0_regnum + 3,
+ regvals + 0 * tdep->wordsize);
if (TYPE_LENGTH (type) > tdep->wordsize)
- regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 4,
- regvals + 1 * tdep->wordsize);
+ regcache->cooked_read (tdep->ppc_gp0_regnum + 4,
+ regvals + 1 * tdep->wordsize);
memcpy (readbuf, regvals, TYPE_LENGTH (type));
}
if (writebuf)
/* This matches SVr4 PPC, it does not match GCC. */
/* The value is padded out to 8 bytes and then loaded, as
two "words" into r3/r4. */
- gdb_byte regvals[MAX_REGISTER_SIZE * 2];
+ gdb_byte regvals[PPC_MAX_REGISTER_SIZE * 2];
memset (regvals, 0, sizeof regvals);
memcpy (regvals, writebuf, TYPE_LENGTH (type));
- regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 3,
- regvals + 0 * tdep->wordsize);
+ regcache->cooked_write (tdep->ppc_gp0_regnum + 3,
+ regvals + 0 * tdep->wordsize);
if (TYPE_LENGTH (type) > tdep->wordsize)
- regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 4,
- regvals + 1 * tdep->wordsize);
+ regcache->cooked_write (tdep->ppc_gp0_regnum + 4,
+ regvals + 1 * tdep->wordsize);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
}
enum return_value_convention
-ppc_sysv_abi_return_value (struct gdbarch *gdbarch, struct type *func_type,
+ppc_sysv_abi_return_value (struct gdbarch *gdbarch, struct value *function,
struct type *valtype, struct regcache *regcache,
gdb_byte *readbuf, const gdb_byte *writebuf)
{
- return do_ppc_sysv_return_value (gdbarch, valtype, regcache, readbuf,
- writebuf, 0);
+ return do_ppc_sysv_return_value (gdbarch,
+ function ? value_type (function) : NULL,
+ valtype, regcache, readbuf, writebuf, 0);
}
enum return_value_convention
ppc_sysv_abi_broken_return_value (struct gdbarch *gdbarch,
- struct type *func_type,
+ struct value *function,
struct type *valtype,
struct regcache *regcache,
gdb_byte *readbuf, const gdb_byte *writebuf)
{
- return do_ppc_sysv_return_value (gdbarch, valtype, regcache, readbuf,
- writebuf, 1);
+ return do_ppc_sysv_return_value (gdbarch,
+ function ? value_type (function) : NULL,
+ valtype, regcache, readbuf, writebuf, 1);
}
/* The helper function for 64-bit SYSV push_dummy_call. Converts the
convert_code_addr_to_desc_addr (CORE_ADDR code_addr, CORE_ADDR *desc_addr)
{
struct obj_section *dot_fn_section;
- struct minimal_symbol *dot_fn;
- struct minimal_symbol *fn;
- CORE_ADDR toc;
+ struct bound_minimal_symbol dot_fn;
+ struct bound_minimal_symbol fn;
+
/* Find the minimal symbol that corresponds to CODE_ADDR (should
have a name of the form ".FN"). */
dot_fn = lookup_minimal_symbol_by_pc (code_addr);
- if (dot_fn == NULL || SYMBOL_LINKAGE_NAME (dot_fn)[0] != '.')
+ if (dot_fn.minsym == NULL || dot_fn.minsym->linkage_name ()[0] != '.')
return 0;
/* Get the section that contains CODE_ADDR. Need this for the
"objfile" that it contains. */
address. Only look for the minimal symbol in ".FN"'s object file
- avoids problems when two object files (i.e., shared libraries)
contain a minimal symbol with the same name. */
- fn = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (dot_fn) + 1, NULL,
+ fn = lookup_minimal_symbol (dot_fn.minsym->linkage_name () + 1, NULL,
dot_fn_section->objfile);
- if (fn == NULL)
+ if (fn.minsym == NULL)
return 0;
/* Found a descriptor. */
- (*desc_addr) = SYMBOL_VALUE_ADDRESS (fn);
+ (*desc_addr) = BMSYMBOL_VALUE_ADDRESS (fn);
return 1;
}
-/* Pass the arguments in either registers, or in the stack. Using the
+/* Walk down the type tree of TYPE counting consecutive base elements.
+ If *FIELD_TYPE is NULL, then set it to the first valid floating point
+ or vector type. If a non-floating point or vector type is found, or
+ if a floating point or vector type that doesn't match a non-NULL
+ *FIELD_TYPE is found, then return -1, otherwise return the count in the
+ sub-tree. */
+
+static LONGEST
+ppc64_aggregate_candidate (struct type *type,
+ struct type **field_type)
+{
+ type = check_typedef (type);
+
+ switch (type->code ())
+ {
+ case TYPE_CODE_FLT:
+ case TYPE_CODE_DECFLOAT:
+ if (!*field_type)
+ *field_type = type;
+ if ((*field_type)->code () == type->code ()
+ && TYPE_LENGTH (*field_type) == TYPE_LENGTH (type))
+ return 1;
+ break;
+
+ case TYPE_CODE_COMPLEX:
+ type = TYPE_TARGET_TYPE (type);
+ if (type->code () == TYPE_CODE_FLT
+ || type->code () == TYPE_CODE_DECFLOAT)
+ {
+ if (!*field_type)
+ *field_type = type;
+ if ((*field_type)->code () == type->code ()
+ && TYPE_LENGTH (*field_type) == TYPE_LENGTH (type))
+ return 2;
+ }
+ break;
+
+ case TYPE_CODE_ARRAY:
+ if (TYPE_VECTOR (type))
+ {
+ if (!*field_type)
+ *field_type = type;
+ if ((*field_type)->code () == type->code ()
+ && TYPE_LENGTH (*field_type) == TYPE_LENGTH (type))
+ return 1;
+ }
+ else
+ {
+ LONGEST count, low_bound, high_bound;
+
+ count = ppc64_aggregate_candidate
+ (TYPE_TARGET_TYPE (type), field_type);
+ if (count == -1)
+ return -1;
+
+ if (!get_array_bounds (type, &low_bound, &high_bound))
+ return -1;
+ count *= high_bound - low_bound;
+
+ /* There must be no padding. */
+ if (count == 0)
+ return TYPE_LENGTH (type) == 0 ? 0 : -1;
+ else if (TYPE_LENGTH (type) != count * TYPE_LENGTH (*field_type))
+ return -1;
+
+ return count;
+ }
+ break;
+
+ case TYPE_CODE_STRUCT:
+ case TYPE_CODE_UNION:
+ {
+ LONGEST count = 0;
+ int i;
+
+ for (i = 0; i < type->num_fields (); i++)
+ {
+ LONGEST sub_count;
+
+ if (field_is_static (&type->field (i)))
+ continue;
+
+ sub_count = ppc64_aggregate_candidate
+ (TYPE_FIELD_TYPE (type, i), field_type);
+ if (sub_count == -1)
+ return -1;
+
+ if (type->code () == TYPE_CODE_STRUCT)
+ count += sub_count;
+ else
+ count = std::max (count, sub_count);
+ }
+
+ /* There must be no padding. */
+ if (count == 0)
+ return TYPE_LENGTH (type) == 0 ? 0 : -1;
+ else if (TYPE_LENGTH (type) != count * TYPE_LENGTH (*field_type))
+ return -1;
+
+ return count;
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ return -1;
+}
+
+/* If an argument of type TYPE is a homogeneous float or vector aggregate
+ that shall be passed in FP/vector registers according to the ELFv2 ABI,
+ return the homogeneous element type in *ELT_TYPE and the number of
+ elements in *N_ELTS, and return non-zero. Otherwise, return zero. */
+
+static int
+ppc64_elfv2_abi_homogeneous_aggregate (struct type *type,
+ struct type **elt_type, int *n_elts)
+{
+ /* Complex types at the top level are treated separately. However,
+ complex types can be elements of homogeneous aggregates. */
+ if (type->code () == TYPE_CODE_STRUCT
+ || type->code () == TYPE_CODE_UNION
+ || (type->code () == TYPE_CODE_ARRAY && !TYPE_VECTOR (type)))
+ {
+ struct type *field_type = NULL;
+ LONGEST field_count = ppc64_aggregate_candidate (type, &field_type);
+
+ if (field_count > 0)
+ {
+ int n_regs = ((field_type->code () == TYPE_CODE_FLT
+ || field_type->code () == TYPE_CODE_DECFLOAT)?
+ (TYPE_LENGTH (field_type) + 7) >> 3 : 1);
+
+ /* The ELFv2 ABI allows homogeneous aggregates to occupy
+ up to 8 registers. */
+ if (field_count * n_regs <= 8)
+ {
+ if (elt_type)
+ *elt_type = field_type;
+ if (n_elts)
+ *n_elts = (int) field_count;
+ /* Note that field_count is LONGEST since it may hold the size
+ of an array, while *n_elts is int since its value is bounded
+ by the number of registers used for argument passing. The
+ cast cannot overflow due to the bounds checking above. */
+ return 1;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/* 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. */
+
+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
+ && gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
+ 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)
+ argpos->regcache->cooked_write (tdep->ppc_gp0_regnum + argpos->greg,
+ val);
+ argpos->greg++;
+ len -= tdep->wordsize;
+ val += tdep->wordsize;
+ }
+
+ if (len > 0)
+ {
+ if (argpos->regcache && argpos->greg <= 10)
+ argpos->regcache->cooked_write_part
+ (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_integer (struct gdbarch *gdbarch, ULONGEST val,
+ struct ppc64_sysv_argpos *argpos)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ gdb_byte buf[PPC_MAX_REGISTER_SIZE];
+
+ 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_CODE_FLT)
+ {
+ /* 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[PPC_MAX_REGISTER_SIZE];
+
+ target_float_convert (val, type, regval, regtype);
+ argpos->regcache->cooked_write (regnum, regval);
+ }
+
+ argpos->freg++;
+ }
+ else if (TYPE_LENGTH (type) <= 8
+ && type->code () == 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 = 0;
+
+ if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
+ offset = 8 - TYPE_LENGTH (type);
+
+ argpos->regcache->cooked_write_part (regnum, offset,
+ TYPE_LENGTH (type), val);
+ }
+
+ argpos->freg++;
+ }
+ else if (TYPE_LENGTH (type) == 16
+ && type->code () == 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)
+ {
+ int regnum = tdep->ppc_fp0_regnum + argpos->freg;
+
+ argpos->regcache->cooked_write (regnum, val);
+ if (argpos->freg <= 12)
+ argpos->regcache->cooked_write (regnum + 1, val + 8);
+ }
+
+ argpos->freg += 2;
+ }
+ else if (TYPE_LENGTH (type) == 16
+ && type->code () == 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;
+
+ if (argpos->regcache && argpos->freg <= 12)
+ {
+ int regnum = tdep->ppc_fp0_regnum + argpos->freg;
+ int lopart = gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG ? 8 : 0;
+ int hipart = gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG ? 0 : 8;
+
+ argpos->regcache->cooked_write (regnum, val + hipart);
+ argpos->regcache->cooked_write (regnum + 1, val + lopart);
+ }
+
+ argpos->freg += 2;
+ }
+}
+
+/* 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)
+ argpos->regcache->cooked_write (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_CODE_FLT
+ || type->code () == 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_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_CODE_ARRAY && TYPE_VECTOR (type)
+ && TYPE_LENGTH (type) >= 16)
+ {
+ /* 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_CODE_INT
+ || type->code () == TYPE_CODE_ENUM
+ || type->code () == TYPE_CODE_BOOL
+ || type->code () == TYPE_CODE_CHAR
+ || type->code () == TYPE_CODE_PTR
+ || TYPE_IS_REFERENCE (type))
+ && TYPE_LENGTH (type) <= tdep->wordsize)
+ {
+ ULONGEST word = 0;
+
+ if (argpos->regcache)
+ {
+ /* Sign extend the value, then store it unsigned. */
+ word = unpack_long (type, val);
+
+ /* Convert any function code addresses into descriptors. */
+ if (tdep->elf_abi == POWERPC_ELF_V1
+ && (type->code () == TYPE_CODE_PTR
+ || type->code () == TYPE_CODE_REF))
+ {
+ struct type *target_type
+ = check_typedef (TYPE_TARGET_TYPE (type));
+
+ if (target_type->code () == TYPE_CODE_FUNC
+ || target_type->code () == TYPE_CODE_METHOD)
+ {
+ CORE_ADDR desc = word;
+
+ convert_code_addr_to_desc_addr (word, &desc);
+ word = desc;
+ }
+ }
+ }
+
+ 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_CODE_STRUCT
+ && type->num_fields () == 1)
+ {
+ while (type->code () == TYPE_CODE_STRUCT
+ && type->num_fields () == 1)
+ type = check_typedef (TYPE_FIELD_TYPE (type, 0));
+
+ if (type->code () == TYPE_CODE_FLT)
+ ppc64_sysv_abi_push_freg (gdbarch, type, val, argpos);
+ }
+
+ /* In the ELFv2 ABI, homogeneous floating-point or vector
+ aggregates are passed in a series of registers. */
+ if (tdep->elf_abi == POWERPC_ELF_V2)
+ {
+ struct type *eltype;
+ int i, nelt;
+
+ if (ppc64_elfv2_abi_homogeneous_aggregate (type, &eltype, &nelt))
+ for (i = 0; i < nelt; i++)
+ {
+ const gdb_byte *elval = val + i * TYPE_LENGTH (eltype);
+
+ if (eltype->code () == TYPE_CODE_FLT
+ || eltype->code () == TYPE_CODE_DECFLOAT)
+ ppc64_sysv_abi_push_freg (gdbarch, eltype, elval, argpos);
+ else if (eltype->code () == TYPE_CODE_ARRAY
+ && TYPE_VECTOR (eltype)
+ && tdep->vector_abi == POWERPC_VEC_ALTIVEC
+ && TYPE_LENGTH (eltype) == 16)
+ ppc64_sysv_abi_push_vreg (gdbarch, elval, argpos);
+ }
+ }
+ }
+}
+
+/* Pass the arguments in either registers, or in the stack. Using the
ppc 64 bit SysV ABI.
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. */
+ greatly simplifies the logic. */
CORE_ADDR
-ppc64_sysv_abi_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
+ppc64_sysv_abi_push_dummy_call (struct gdbarch *gdbarch,
+ struct value *function,
struct regcache *regcache, CORE_ADDR bp_addr,
int nargs, struct value **args, CORE_ADDR sp,
- int struct_return, CORE_ADDR struct_addr)
+ function_call_return_method return_method,
+ CORE_ADDR struct_addr)
{
CORE_ADDR func_addr = find_function_addr (function, NULL);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ int opencl_abi = ppc_sysv_use_opencl_abi (value_type (function));
ULONGEST back_chain;
/* See for-loop comment below. */
int write_pass;
- /* Size of the Altivec's vector parameter region, the final value is
+ /* Size of the by-reference parameter copy region, the final value is
computed in the for-loop below. */
- LONGEST vparam_size = 0;
+ LONGEST refparam_size = 0;
/* Size of the general parameter region, the final value is computed
in the for-loop below. */
LONGEST gparam_size = 0;
/* Kevin writes ... I don't mind seeing tdep->wordsize used in the
- calls to align_up(), align_down(), etc. because this makes it
+ calls to align_up(), align_down(), etc. because this makes it
easier to reuse this code (in a copy/paste sense) in the future,
but it is a 64-bit ABI and asserting that the wordsize is 8 bytes
at some point makes it easier to verify that this function is
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, ...) should be saved. */
- CORE_ADDR gparam;
- /* Address, at which the next Altivec vector parameter should be
- saved. */
- CORE_ADDR vparam;
+
+ struct ppc64_sysv_argpos argpos;
+ argpos.greg = 3;
+ argpos.freg = 1;
+ argpos.vreg = 2;
if (!write_pass)
{
- /* During the first pass, GPARAM and VPARAM are more like
+ /* During the first pass, GPARAM and REFPARAM are more like
offsets (start address zero) than addresses. That way
- the accumulate the total stack space each region
+ they accumulate the total stack space each region
requires. */
- gparam = 0;
- vparam = 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 vparam and gparam
+ and general on-stack parameters. Set refparam and gparam
to their corresponding regions. */
- vparam = align_down (sp - vparam_size, 16);
- gparam = align_down (vparam - 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);
+ 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 (v1 only),
+ compiler double word (v1 only), LR save area, CR save area,
+ and backchain. */
+ if (tdep->elf_abi == POWERPC_ELF_V1)
+ sp = align_down (argpos.gparam - 48, 16);
+ else
+ sp = align_down (argpos.gparam - 32, 16);
}
/* If the function is returning a `struct', then there is an
containing the address of that struct.. In that case we
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);
- }
+ if (return_method == return_method_struct)
+ 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_CODE_COMPLEX)
{
- /* Floats and Doubles go in f1 .. f13. They also
- consume a left aligned GREG,, and can end up in
- memory. */
- if (write_pass)
- {
- gdb_byte regval[MAX_REGISTER_SIZE];
- const gdb_byte *p;
-
- /* Version 1.7 of the 64-bit PowerPC ELF ABI says:
-
- "Single precision floating point values are mapped to
- the first word in a single doubleword."
-
- And version 1.9 says:
-
- "Single precision floating point values are mapped to
- the second word in a single doubleword."
-
- GDB then writes single precision floating point values
- at both words in a doubleword, to support both ABIs. */
- if (TYPE_LENGTH (type) == 4)
- {
- memcpy (regval, val, 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)
- {
- 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);
- }
- if (greg <= 10)
- regcache_cooked_write (regcache,
- tdep->ppc_gp0_regnum + greg,
- regval);
- }
+ /* Complex types are passed as if two independent scalars. */
+ struct type *eltype = check_typedef (TYPE_TARGET_TYPE (type));
- 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))
- {
- /* IBM long double stored in two doublewords of the
- parameter save area and corresponding registers. */
- if (write_pass)
- {
- if (!tdep->soft_float && freg <= 13)
- {
- 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);
- }
- if (greg <= 10)
- {
- 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);
- }
- write_memory (gparam, val, TYPE_LENGTH (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_CODE (type) == TYPE_CODE_DECFLOAT
- && TYPE_LENGTH (type) <= 8)
+ else if (type->code () == TYPE_CODE_ARRAY && TYPE_VECTOR (type)
+ && opencl_abi)
{
- /* 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);
- }
+ /* OpenCL vectors shorter than 16 bytes are passed as if
+ 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);
- 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)
+ nelt = TYPE_LENGTH (type) / TYPE_LENGTH (eltype);
+ for (i = 0; i < nelt; i++)
{
- 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));
- }
+ const gdb_byte *elval = val + i * TYPE_LENGTH (eltype);
- freg += 2;
- greg += 2;
- gparam = align_up (gparam + TYPE_LENGTH (type), tdep->wordsize);
- }
- else if (TYPE_LENGTH (type) == 16 && TYPE_VECTOR (type)
- && TYPE_CODE (type) == TYPE_CODE_ARRAY
- && tdep->ppc_vr0_regnum >= 0)
- {
- /* In the Altivec ABI, vectors go in the vector
- registers v2 .. v13, or when that runs out, a vector
- annex which goes above all the normal parameters.
- NOTE: cagney/2003-09-21: This is a guess based on the
- PowerOpen Altivec ABI. */
- if (vreg <= 13)
- {
- if (write_pass)
- regcache_cooked_write (regcache,
- tdep->ppc_vr0_regnum + vreg, val);
- vreg++;
- }
- else
- {
- if (write_pass)
- write_memory (vparam, val, TYPE_LENGTH (type));
- vparam = align_up (vparam + TYPE_LENGTH (type), 16);
+ ppc64_sysv_abi_push_param (gdbarch, eltype, elval, &argpos);
}
}
- else if ((TYPE_CODE (type) == TYPE_CODE_INT
- || TYPE_CODE (type) == TYPE_CODE_ENUM
- || TYPE_CODE (type) == TYPE_CODE_PTR)
- && 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_TARGET_TYPE (type)) == TYPE_CODE_FUNC)
- {
- 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,
- word);
- }
- 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. */
- write_memory (gparam, val, TYPE_LENGTH (type));
- 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. */
- vparam_size = vparam;
+ 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;
}
}
regcache_cooked_write_signed (regcache, gdbarch_sp_regnum (gdbarch), sp);
/* Write the backchain (it occupies WORDSIZED bytes). */
- write_memory_signed_integer (sp, tdep->wordsize, back_chain);
+ write_memory_signed_integer (sp, tdep->wordsize, byte_order, back_chain);
/* Point the inferior function call's return address at the dummy's
breakpoint. */
regcache_cooked_write_signed (regcache, tdep->ppc_lr_regnum, bp_addr);
- /* Use the func_addr to find the descriptor, and use that to find
- the TOC. */
- {
- CORE_ADDR desc_addr;
- if (convert_code_addr_to_desc_addr (func_addr, &desc_addr))
- {
- /* The TOC is the second double word in the descriptor. */
- CORE_ADDR toc =
- read_memory_unsigned_integer (desc_addr + tdep->wordsize,
- tdep->wordsize);
- regcache_cooked_write_unsigned (regcache,
- tdep->ppc_gp0_regnum + 2, toc);
- }
- }
+ /* In the ELFv1 ABI, use the func_addr to find the descriptor, and use
+ that to find the TOC. If we're calling via a function pointer,
+ the pointer itself identifies the descriptor. */
+ if (tdep->elf_abi == POWERPC_ELF_V1)
+ {
+ struct type *ftype = check_typedef (value_type (function));
+ CORE_ADDR desc_addr = value_as_address (function);
+
+ if (ftype->code () == TYPE_CODE_PTR
+ || convert_code_addr_to_desc_addr (func_addr, &desc_addr))
+ {
+ /* The TOC is the second double word in the descriptor. */
+ CORE_ADDR toc =
+ read_memory_unsigned_integer (desc_addr + tdep->wordsize,
+ tdep->wordsize, byte_order);
+
+ regcache_cooked_write_unsigned (regcache,
+ tdep->ppc_gp0_regnum + 2, toc);
+ }
+ }
+
+ /* In the ELFv2 ABI, we need to pass the target address in r12 since
+ we may be calling a global entry point. */
+ if (tdep->elf_abi == POWERPC_ELF_V2)
+ regcache_cooked_write_unsigned (regcache,
+ tdep->ppc_gp0_regnum + 12, func_addr);
return sp;
}
+/* Subroutine of ppc64_sysv_abi_return_value that handles "base" types:
+ integer, floating-point, and AltiVec vector types.
+
+ This routine also handles components of aggregate return types;
+ INDEX describes which part of the aggregate is to be handled.
+
+ 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);
+
+ /* Integers live in GPRs starting at r3. */
+ if ((valtype->code () == TYPE_CODE_INT
+ || valtype->code () == TYPE_CODE_ENUM
+ || valtype->code () == TYPE_CODE_CHAR
+ || valtype->code () == 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, regnum,
+ unpack_long (valtype, writebuf));
+ }
+ if (readbuf != NULL)
+ {
+ /* 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, regnum, ®val);
+ store_unsigned_integer (readbuf, TYPE_LENGTH (valtype),
+ gdbarch_byte_order (gdbarch), regval);
+ }
+ return 1;
+ }
+
+ /* Floats and doubles go in f1 .. f13. 32-bit floats are converted
+ to double first. */
+ if (TYPE_LENGTH (valtype) <= 8
+ && valtype->code () == TYPE_CODE_FLT)
+ {
+ int regnum = tdep->ppc_fp0_regnum + 1 + index;
+ struct type *regtype = register_type (gdbarch, regnum);
+ gdb_byte regval[PPC_MAX_REGISTER_SIZE];
+
+ if (writebuf != NULL)
+ {
+ target_float_convert (writebuf, valtype, regval, regtype);
+ regcache->cooked_write (regnum, regval);
+ }
+ if (readbuf != NULL)
+ {
+ regcache->cooked_read (regnum, regval);
+ target_float_convert (regval, regtype, readbuf, valtype);
+ }
+ return 1;
+ }
+
+ /* Floats and doubles go in f1 .. f13. 32-bit decimal floats are
+ placed in the least significant word. */
+ if (TYPE_LENGTH (valtype) <= 8
+ && valtype->code () == TYPE_CODE_DECFLOAT)
+ {
+ int regnum = tdep->ppc_fp0_regnum + 1 + index;
+ int offset = 0;
+
+ if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
+ offset = 8 - TYPE_LENGTH (valtype);
+
+ if (writebuf != NULL)
+ regcache->cooked_write_part (regnum, offset, TYPE_LENGTH (valtype),
+ writebuf);
+ if (readbuf != NULL)
+ regcache->cooked_read_part (regnum, offset, TYPE_LENGTH (valtype),
+ readbuf);
+ return 1;
+ }
+
+ /* IBM long double stored in two consecutive FPRs. */
+ if (TYPE_LENGTH (valtype) == 16
+ && valtype->code () == TYPE_CODE_FLT
+ && (gdbarch_long_double_format (gdbarch)
+ == floatformats_ibm_long_double))
+ {
+ int regnum = tdep->ppc_fp0_regnum + 1 + 2 * index;
+
+ if (writebuf != NULL)
+ {
+ regcache->cooked_write (regnum, writebuf);
+ regcache->cooked_write (regnum + 1, writebuf + 8);
+ }
+ if (readbuf != NULL)
+ {
+ regcache->cooked_read (regnum, readbuf);
+ regcache->cooked_read (regnum + 1, readbuf + 8);
+ }
+ return 1;
+ }
+
+ /* 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
+ && valtype->code () == TYPE_CODE_DECFLOAT)
+ {
+ int regnum = tdep->ppc_fp0_regnum + 2 + 2 * index;
+ int lopart = gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG ? 8 : 0;
+ int hipart = gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG ? 0 : 8;
+
+ if (writebuf != NULL)
+ {
+ regcache->cooked_write (regnum, writebuf + hipart);
+ regcache->cooked_write (regnum + 1, writebuf + lopart);
+ }
+ if (readbuf != NULL)
+ {
+ regcache->cooked_read (regnum, readbuf + hipart);
+ regcache->cooked_read (regnum + 1, readbuf + lopart);
+ }
+ return 1;
+ }
+
+ /* AltiVec vectors are returned in VRs starting at v2. */
+ if (TYPE_LENGTH (valtype) == 16
+ && valtype->code () == TYPE_CODE_ARRAY && TYPE_VECTOR (valtype)
+ && tdep->vector_abi == POWERPC_VEC_ALTIVEC)
+ {
+ int regnum = tdep->ppc_vr0_regnum + 2 + index;
+
+ if (writebuf != NULL)
+ regcache->cooked_write (regnum, writebuf);
+ if (readbuf != NULL)
+ regcache->cooked_read (regnum, readbuf);
+ return 1;
+ }
+
+ /* Short vectors are returned in GPRs starting at r3. */
+ if (TYPE_LENGTH (valtype) <= 8
+ && valtype->code () == TYPE_CODE_ARRAY && TYPE_VECTOR (valtype))
+ {
+ int regnum = tdep->ppc_gp0_regnum + 3 + index;
+ int offset = 0;
+
+ if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
+ offset = 8 - TYPE_LENGTH (valtype);
+
+ if (writebuf != NULL)
+ regcache->cooked_write_part (regnum, offset, TYPE_LENGTH (valtype),
+ writebuf);
+ if (readbuf != NULL)
+ regcache->cooked_read_part (regnum, offset, TYPE_LENGTH (valtype),
+ readbuf);
+ return 1;
+ }
+
+ return 0;
+}
/* The 64 bit ABI return value convention.
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 type *func_type,
+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, 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));
- /* Floats and doubles in F1. */
- if (TYPE_CODE (valtype) == TYPE_CODE_FLT && TYPE_LENGTH (valtype) <= 8)
+ /* Complex types are returned as if two independent scalars. */
+ if (valtype->code () == TYPE_CODE_COMPLEX)
{
- 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)
+ eltype = check_typedef (TYPE_TARGET_TYPE (valtype));
+
+ for (int i = 0; i < 2; i++)
{
- regcache_cooked_read (regcache, tdep->ppc_fp0_regnum + 1, regval);
- convert_typed_floating (regval, regtype, readbuf, valtype);
+ 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;
}
- if (TYPE_CODE (valtype) == TYPE_CODE_DECFLOAT)
- return get_decimal_float_return_value (gdbarch, valtype, regcache, readbuf,
- writebuf);
- /* Integers in r3. */
- if ((TYPE_CODE (valtype) == TYPE_CODE_INT
- || TYPE_CODE (valtype) == TYPE_CODE_ENUM)
- && TYPE_LENGTH (valtype) <= 8)
+
+ /* 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 (valtype->code () == TYPE_CODE_ARRAY && TYPE_VECTOR (valtype)
+ && opencl_abi)
{
- if (writebuf != NULL)
- {
- /* Be careful to sign extend the value. */
- regcache_cooked_write_unsigned (regcache, tdep->ppc_gp0_regnum + 3,
- unpack_long (valtype, writebuf));
- }
- if (readbuf != 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 (int i = 0; i < nelt; i++)
{
- /* Extract the integer from r3. 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), regval);
+ 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;
}
+
/* All pointers live in r3. */
- if (TYPE_CODE (valtype) == TYPE_CODE_PTR)
+ if (valtype->code () == TYPE_CODE_PTR || TYPE_IS_REFERENCE (valtype))
{
- /* All pointers live in r3. */
+ int regnum = tdep->ppc_gp0_regnum + 3;
+
if (writebuf != NULL)
- regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 3, writebuf);
+ regcache->cooked_write (regnum, writebuf);
if (readbuf != NULL)
- regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 3, readbuf);
+ regcache->cooked_read (regnum, readbuf);
return RETURN_VALUE_REGISTER_CONVENTION;
}
- /* Array type has more than one use. */
- if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY)
+
+ /* Small character arrays are returned, right justified, in r3. */
+ if (valtype->code () == TYPE_CODE_ARRAY
+ && !TYPE_VECTOR (valtype)
+ && TYPE_LENGTH (valtype) <= 8
+ && TYPE_TARGET_TYPE (valtype)->code () == TYPE_CODE_INT
+ && TYPE_LENGTH (TYPE_TARGET_TYPE (valtype)) == 1)
{
- /* 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->ppc_vr0_regnum >= 0)
- {
- 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_gp0_regnum + 3;
+ int offset = (register_size (gdbarch, regnum) - TYPE_LENGTH (valtype));
+
+ if (writebuf != NULL)
+ regcache->cooked_write_part (regnum, offset, TYPE_LENGTH (valtype),
+ writebuf);
+ if (readbuf != NULL)
+ regcache->cooked_read_part (regnum, offset, TYPE_LENGTH (valtype),
+ readbuf);
+ return RETURN_VALUE_REGISTER_CONVENTION;
}
- /* 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))
+
+ /* In the ELFv2 ABI, homogeneous floating-point or vector
+ aggregates are returned in registers. */
+ if (tdep->elf_abi == POWERPC_ELF_V2
+ && ppc64_elfv2_abi_homogeneous_aggregate (valtype, &eltype, &nelt)
+ && (eltype->code () == TYPE_CODE_FLT
+ || eltype->code () == TYPE_CODE_DECFLOAT
+ || (eltype->code () == TYPE_CODE_ARRAY
+ && TYPE_VECTOR (eltype)
+ && tdep->vector_abi == POWERPC_VEC_ALTIVEC
+ && TYPE_LENGTH (eltype) == 16)))
{
- if (writebuf || readbuf != NULL)
+ for (int i = 0; i < nelt; 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))
+
+ /* In the ELFv2 ABI, aggregate types of up to 16 bytes are
+ returned in registers r3:r4. */
+ if (tdep->elf_abi == POWERPC_ELF_V2
+ && TYPE_LENGTH (valtype) <= 16
+ && (valtype->code () == TYPE_CODE_STRUCT
+ || valtype->code () == TYPE_CODE_UNION
+ || (valtype->code () == TYPE_CODE_ARRAY
+ && !TYPE_VECTOR (valtype))))
{
- if (regcache != NULL)
+ int n_regs = ((TYPE_LENGTH (valtype) + tdep->wordsize - 1)
+ / tdep->wordsize);
+
+ for (int i = 0; i < n_regs; i++)
{
- int i;
- for (i = 0; i < 2; i++)
+ gdb_byte regval[PPC_MAX_REGISTER_SIZE];
+ int regnum = tdep->ppc_gp0_regnum + 3 + i;
+ int offset = i * tdep->wordsize;
+ int len = TYPE_LENGTH (valtype) - offset;
+
+ if (len > tdep->wordsize)
+ len = tdep->wordsize;
+
+ if (writebuf != NULL)
{
- gdb_byte regval[MAX_REGISTER_SIZE];
- struct type *regtype =
- register_type (gdbarch, tdep->ppc_fp0_regnum);
- if (writebuf != NULL)
- {
- convert_typed_floating ((const bfd_byte *) writebuf +
- i * (TYPE_LENGTH (valtype) / 2),
- valtype, 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 (valtype) / 2),
- valtype);
- }
+ memset (regval, 0, sizeof regval);
+ if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG
+ && offset == 0)
+ memcpy (regval + tdep->wordsize - len, writebuf, len);
+ else
+ memcpy (regval, writebuf + offset, len);
+ regcache->cooked_write (regnum, regval);
}
- }
- return RETURN_VALUE_REGISTER_CONVENTION;
- }
- /* Big complex values get stored in f1:f4. */
- if (TYPE_CODE (valtype) == TYPE_CODE_COMPLEX && TYPE_LENGTH (valtype) == 32)
- {
- if (regcache != NULL)
- {
- int i;
- for (i = 0; i < 4; i++)
+ if (readbuf != NULL)
{
- 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);
+ regcache->cooked_read (regnum, regval);
+ if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG
+ && offset == 0)
+ memcpy (readbuf, regval + tdep->wordsize - len, len);
+ else
+ memcpy (readbuf + offset, regval, len);
}
}
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;
}
-CORE_ADDR
-ppc64_sysv_abi_adjust_breakpoint_address (struct gdbarch *gdbarch,
- CORE_ADDR bpaddr)
-{
- /* PPC64 SYSV specifies that the minimal-symbol "FN" should point at
- a function-descriptor while the corresponding minimal-symbol
- ".FN" should point at the entry point. Consequently, a command
- like "break FN" applied to an object file with only minimal
- symbols, will insert the breakpoint into the descriptor at "FN"
- and not the function at ".FN". Avoid this confusion by adjusting
- any attempt to set a descriptor breakpoint into a corresponding
- function breakpoint. Note that GDB warns the user when this
- adjustment is applied - that's ok as otherwise the user will have
- no way of knowing why their breakpoint at "FN" resulted in the
- program stopping at ".FN". */
- return gdbarch_convert_from_func_ptr_addr (gdbarch, bpaddr, ¤t_target);
-}
projects / deliverable / binutils-gdb.git / blobdiff