/* Target-dependent code for PowerPC systems using the SVR4 ABI
for GDB, the GNU debugger.
- Copyright 2000, 2001, 2002, 2003, 2005 Free Software Foundation,
- Inc.
+ Copyright (C) 2000, 2001, 2002, 2003, 2005, 2007, 2008
+ Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "gdbcore.h"
int nargs, struct value **args, CORE_ADDR sp,
int struct_return, CORE_ADDR struct_addr)
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
- const CORE_ADDR saved_sp = read_sp ();
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ ULONGEST saved_sp;
int argspace = 0; /* 0 is an initial wrong guess. */
int write_pass;
+ gdb_assert (tdep->wordsize == 4);
+
+ regcache_cooked_read_unsigned (regcache, gdbarch_sp_regnum (gdbarch),
+ &saved_sp);
+
/* Go through the argument list twice.
Pass 1: Figure out how much new stack space is required for
int len = TYPE_LENGTH (type);
const bfd_byte *val = value_contents (arg);
- if (TYPE_CODE (type) == TYPE_CODE_FLT
- && ppc_floating_point_unit_p (current_gdbarch) && len <= 8)
+ if (TYPE_CODE (type) == TYPE_CODE_FLT && len <= 8
+ && !tdep->soft_float)
{
/* Floating point value converted to "double" then
passed in an FP register, when the registers run out,
{
/* Always store the floating point value using
the register's floating-point format. */
- char regval[MAX_REGISTER_SIZE];
+ gdb_byte regval[MAX_REGISTER_SIZE];
struct type *regtype
= register_type (gdbarch, tdep->ppc_fp0_regnum + freg);
convert_typed_floating (val, type, regval, regtype);
}
else
{
- /* SysV ABI converts floats to doubles before
- writing them to an 8 byte aligned stack location. */
- argoffset = align_up (argoffset, 8);
+ /* The SysV ABI tells us to convert floats to
+ doubles before writing them to an 8 byte aligned
+ stack location. Unfortunately GCC does not do
+ that, and stores floats into 4 byte aligned
+ locations without converting them to doubles.
+ Since there is no know compiler that actually
+ follows the ABI here, we implement the GCC
+ convention. */
+
+ /* Align to 4 bytes or 8 bytes depending on the type of
+ the argument (float or double). */
+ argoffset = align_up (argoffset, len);
if (write_pass)
- {
- char memval[8];
- struct type *memtype;
- switch (TARGET_BYTE_ORDER)
- {
- case BFD_ENDIAN_BIG:
- memtype = builtin_type_ieee_double_big;
- break;
- case BFD_ENDIAN_LITTLE:
- memtype = builtin_type_ieee_double_little;
- break;
- default:
- internal_error (__FILE__, __LINE__, "bad switch");
- }
- convert_typed_floating (val, type, memval, memtype);
write_memory (sp + argoffset, val, len);
+ argoffset += len;
+ }
+ }
+ else if (TYPE_CODE (type) == TYPE_CODE_FLT
+ && len == 16
+ && !tdep->soft_float
+ && (gdbarch_long_double_format (gdbarch)
+ == floatformats_ibm_long_double))
+ {
+ /* IBM long double passed in two FP registers if
+ available, otherwise 8-byte aligned stack. */
+ if (freg <= 7)
+ {
+ 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);
}
- argoffset += 8;
+ freg += 2;
+ }
+ else
+ {
+ argoffset = align_up (argoffset, 8);
+ if (write_pass)
+ write_memory (sp + argoffset, val, len);
+ argoffset += 16;
}
}
- else if (len == 8 && (TYPE_CODE (type) == TYPE_CODE_INT /* long long */
- || (!ppc_floating_point_unit_p (current_gdbarch) && TYPE_CODE (type) == TYPE_CODE_FLT))) /* double */
+ else if (len == 8
+ && (TYPE_CODE (type) == TYPE_CODE_INT /* long long */
+ || TYPE_CODE (type) == TYPE_CODE_FLT)) /* double */
{
- /* "long long" or "double" passed in an odd/even
+ /* "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
write_memory (sp + argoffset, val, len);
argoffset += 8;
}
- else if (tdep->wordsize == 8)
- {
- if (write_pass)
- regcache_cooked_write (regcache,
- tdep->ppc_gp0_regnum + greg, val);
- greg += 1;
- }
else
{
/* Must start on an odd register - r3/r4 etc. */
greg += 2;
}
}
+ else if (len == 16 && TYPE_CODE (type) == TYPE_CODE_FLT
+ && (gdbarch_long_double_format (gdbarch)
+ == floatformats_ibm_long_double))
+ {
+ /* Soft-float IBM long double passed in four consecutive
+ registers, or on the stack. The registers are not
+ necessarily odd/even pairs. */
+ if (greg > 7)
+ {
+ greg = 11;
+ argoffset = align_up (argoffset, 8);
+ if (write_pass)
+ write_memory (sp + argoffset, val, len);
+ argoffset += 16;
+ }
+ else
+ {
+ 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);
+ }
+ greg += 4;
+ }
+ }
+ else if (TYPE_CODE (type) == TYPE_CODE_DECFLOAT && len <= 8
+ && !tdep->soft_float)
+ {
+ /* 32-bit and 64-bit decimal floats go in f1 .. f8. They can
+ end up in memory. */
+
+ if (freg <= 8)
+ {
+ 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;
+
+ regcache_cooked_write (regcache,
+ tdep->ppc_fp0_regnum + freg, p);
+ }
+
+ freg++;
+ }
+ else
+ {
+ argoffset = align_up (argoffset, len);
+
+ if (write_pass)
+ /* Write value in the stack's parameter save area. */
+ write_memory (sp + argoffset, val, len);
+
+ argoffset += len;
+ }
+ }
+ else if (TYPE_CODE (type) == TYPE_CODE_DECFLOAT && len == 16
+ && !tdep->soft_float)
+ {
+ /* 128-bit decimal floats go in f2 .. f7, always in even/odd
+ pairs. They can end up in memory, using two doublewords. */
+
+ if (freg <= 6)
+ {
+ /* Make sure freg is even. */
+ freg += freg & 1;
+
+ 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);
+ }
+ }
+ else
+ {
+ argoffset = align_up (argoffset, 8);
+
+ if (write_pass)
+ write_memory (sp + argoffset, val, 16);
+
+ argoffset += 16;
+ }
+
+ /* If a 128-bit decimal float goes to the stack because only f7
+ and f8 are free (thus there's no even/odd register pair
+ available), these registers should be marked as occupied.
+ Hence we increase freg even when writing to memory. */
+ freg += 2;
+ }
else if (len == 16
&& TYPE_CODE (type) == TYPE_CODE_ARRAY
- && TYPE_VECTOR (type) && tdep->ppc_vr0_regnum >= 0)
+ && TYPE_VECTOR (type)
+ && tdep->vector_abi == POWERPC_VEC_ALTIVEC)
{
/* Vector parameter passed in an Altivec register, or
when that runs out, 16 byte aligned stack location. */
if (vreg <= 13)
{
if (write_pass)
- regcache_cooked_write (current_regcache,
+ regcache_cooked_write (regcache,
tdep->ppc_vr0_regnum + vreg, val);
vreg++;
}
}
else if (len == 8
&& TYPE_CODE (type) == TYPE_CODE_ARRAY
- && TYPE_VECTOR (type) && tdep->ppc_ev0_regnum >= 0)
+ && TYPE_VECTOR (type)
+ && tdep->vector_abi == POWERPC_VEC_SPE)
{
/* Vector parameter passed in an e500 register, or when
that runs out, 8 byte aligned stack location. Note
if (greg <= 10)
{
if (write_pass)
- regcache_cooked_write (current_regcache,
+ regcache_cooked_write (regcache,
tdep->ppc_ev0_regnum + greg, val);
greg++;
}
{
/* Reduce the parameter down to something that fits in a
"word". */
- char word[MAX_REGISTER_SIZE];
+ gdb_byte word[MAX_REGISTER_SIZE];
memset (word, 0, MAX_REGISTER_SIZE);
if (len > tdep->wordsize
|| TYPE_CODE (type) == TYPE_CODE_STRUCT
|| TYPE_CODE (type) == TYPE_CODE_UNION)
{
- /* Structs and large values are put on an 8 byte
- aligned stack ... */
- structoffset = align_up (structoffset, 8);
+ /* Structs and large values are put in an
+ aligned stack slot ... */
+ if (TYPE_CODE (type) == TYPE_CODE_ARRAY
+ && TYPE_VECTOR (type)
+ && len >= 16)
+ structoffset = align_up (structoffset, 16);
+ else
+ structoffset = align_up (structoffset, 8);
+
if (write_pass)
write_memory (sp + structoffset, val, len);
/* ... and then a "word" pointing to that address is
/* Ensure that the stack is still 16 byte aligned. */
sp = align_down (sp, 16);
}
+
+ /* 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
+ bit to 0 otherwise..." Doing this for normal functions too
+ shouldn't hurt. */
+ if (write_pass)
+ {
+ ULONGEST cr;
+
+ regcache_cooked_read_unsigned (regcache, tdep->ppc_cr_regnum, &cr);
+ if (freg > 1)
+ cr |= 0x02000000;
+ else
+ cr &= ~0x02000000;
+ regcache_cooked_write_unsigned (regcache, tdep->ppc_cr_regnum, cr);
+ }
}
/* Update %sp. */
- regcache_cooked_write_signed (regcache, SP_REGNUM, sp);
+ 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);
return sp;
}
+/* Handle the return-value conventions for Decimal Floating Point values
+ in both ppc32 and ppc64, which are the same. */
+static int
+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);
+
+ /* 32-bit and 64-bit decimal floats in f1. */
+ if (TYPE_LENGTH (valtype) <= 8)
+ {
+ if (writebuf != NULL)
+ {
+ gdb_byte regval[MAX_REGISTER_SIZE];
+ const gdb_byte *p;
+
+ /* 32-bit decimal float is right aligned in the doubleword. */
+ if (TYPE_LENGTH (valtype) == 4)
+ {
+ memcpy (regval + 4, writebuf, 4);
+ p = regval;
+ }
+ else
+ p = writebuf;
+
+ regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 1, p);
+ }
+ if (readbuf != NULL)
+ {
+ regcache_cooked_read (regcache, tdep->ppc_fp0_regnum + 1, readbuf);
+
+ /* Left align 32-bit decimal float. */
+ if (TYPE_LENGTH (valtype) == 4)
+ memcpy (readbuf, readbuf + 4, 4);
+ }
+ }
+ /* 128-bit decimal floats in f2,f3. */
+ else if (TYPE_LENGTH (valtype) == 16)
+ {
+ if (writebuf != NULL || readbuf != NULL)
+ {
+ int i;
+
+ for (i = 0; i < 2; i++)
+ {
+ if (writebuf != NULL)
+ regcache_cooked_write (regcache, 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);
+ }
+ }
+ }
+ else
+ /* Can't happen. */
+ internal_error (__FILE__, __LINE__, "Unknown decimal float size.");
+
+ return RETURN_VALUE_REGISTER_CONVENTION;
+}
+
/* Handle the return-value conventions specified by the SysV 32-bit
PowerPC ABI (including all the supplements):
static enum return_value_convention
do_ppc_sysv_return_value (struct gdbarch *gdbarch, struct type *type,
- struct regcache *regcache, void *readbuf,
- const void *writebuf, int broken_gcc)
+ struct regcache *regcache, gdb_byte *readbuf,
+ const gdb_byte *writebuf, int broken_gcc)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
gdb_assert (tdep->wordsize == 4);
if (TYPE_CODE (type) == TYPE_CODE_FLT
&& TYPE_LENGTH (type) <= 8
- && ppc_floating_point_unit_p (gdbarch))
+ && !tdep->soft_float)
{
if (readbuf)
{
/* Floats and doubles stored in "f1". Convert the value to
the required type. */
- char regval[MAX_REGISTER_SIZE];
+ gdb_byte regval[MAX_REGISTER_SIZE];
struct type *regtype = register_type (gdbarch,
tdep->ppc_fp0_regnum + 1);
regcache_cooked_read (regcache, tdep->ppc_fp0_regnum + 1, regval);
{
/* Floats and doubles stored in "f1". Convert the value to
the register's "double" type. */
- char regval[MAX_REGISTER_SIZE];
+ gdb_byte regval[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);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
+ if (TYPE_CODE (type) == TYPE_CODE_FLT
+ && TYPE_LENGTH (type) == 16
+ && !tdep->soft_float
+ && (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);
+ }
+ if (writebuf)
+ {
+ regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 1, writebuf);
+ regcache_cooked_write (regcache, 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))
+ {
+ /* Soft-float IBM long double 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);
+ }
+ 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);
+ }
+ 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))
{
{
/* A long long, or a double stored in the 32 bit r3/r4. */
regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 3,
- (bfd_byte *) readbuf + 0);
+ readbuf + 0);
regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 4,
- (bfd_byte *) readbuf + 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,
- (const bfd_byte *) writebuf + 0);
+ writebuf + 0);
regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 4,
- (const bfd_byte *) writebuf + 4);
+ writebuf + 4);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
- if (TYPE_CODE (type) == TYPE_CODE_INT
- && TYPE_LENGTH (type) <= tdep->wordsize)
+ if (TYPE_CODE (type) == 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)
+ && TYPE_LENGTH (type) <= tdep->wordsize)
{
if (readbuf)
{
}
if (TYPE_LENGTH (type) == 16
&& TYPE_CODE (type) == TYPE_CODE_ARRAY
- && TYPE_VECTOR (type) && tdep->ppc_vr0_regnum >= 0)
+ && TYPE_VECTOR (type)
+ && tdep->vector_abi == POWERPC_VEC_ALTIVEC)
{
if (readbuf)
{
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
+ if (TYPE_LENGTH (type) == 16
+ && TYPE_CODE (type) == TYPE_CODE_ARRAY
+ && TYPE_VECTOR (type)
+ && tdep->vector_abi == POWERPC_VEC_GENERIC)
+ {
+ /* GCC -maltivec -mabi=no-altivec returns vectors in r3/r4/r5/r6.
+ GCC without AltiVec returns them in memory, but it warns about
+ 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);
+ }
+ 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);
+ }
+ return RETURN_VALUE_REGISTER_CONVENTION;
+ }
if (TYPE_LENGTH (type) == 8
&& TYPE_CODE (type) == TYPE_CODE_ARRAY
- && TYPE_VECTOR (type) && tdep->ppc_ev0_regnum >= 0)
+ && TYPE_VECTOR (type)
+ && tdep->vector_abi == POWERPC_VEC_SPE)
{
/* The e500 ABI places return values for the 64-bit DSP types
(__ev64_opaque__) in r3. However, in GDB-speak, ev3
}
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];
+ int len = TYPE_LENGTH (type);
+ int offset = (2 * tdep->wordsize - len) % tdep->wordsize;
+
if (readbuf)
{
- /* GCC screwed up. The last register isn't "left" aligned.
- Need to extract the least significant part of each
- register and then store that. */
- /* Transfer any full words. */
- int word = 0;
- while (1)
- {
- ULONGEST reg;
- int len = TYPE_LENGTH (type) - word * tdep->wordsize;
- if (len <= 0)
- break;
- if (len > tdep->wordsize)
- len = tdep->wordsize;
- regcache_cooked_read_unsigned (regcache,
- tdep->ppc_gp0_regnum + 3 + word,
- ®);
- store_unsigned_integer (((bfd_byte *) readbuf
- + word * tdep->wordsize), len, reg);
- word++;
- }
+ regcache_cooked_read (regcache, 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);
+ memcpy (readbuf, regvals + offset, len);
}
if (writebuf)
{
- /* GCC screwed up. The last register isn't "left" aligned.
- Need to extract the least significant part of each
- register and then store that. */
- /* Transfer any full words. */
- int word = 0;
- while (1)
- {
- ULONGEST reg;
- int len = TYPE_LENGTH (type) - word * tdep->wordsize;
- if (len <= 0)
- break;
- if (len > tdep->wordsize)
- len = tdep->wordsize;
- reg = extract_unsigned_integer (((const bfd_byte *) writebuf
- + word * tdep->wordsize), len);
- regcache_cooked_write_unsigned (regcache,
- tdep->ppc_gp0_regnum + 3 + word,
- reg);
- word++;
- }
+ memset (regvals, 0, sizeof regvals);
+ memcpy (regvals + offset, writebuf, len);
+ regcache_cooked_write (regcache, 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);
}
+
return RETURN_VALUE_REGISTER_CONVENTION;
}
if (TYPE_LENGTH (type) <= 8)
/* 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. */
- char regvals[MAX_REGISTER_SIZE * 2];
+ gdb_byte regvals[MAX_REGISTER_SIZE * 2];
regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 3,
regvals + 0 * tdep->wordsize);
if (TYPE_LENGTH (type) > tdep->wordsize)
/* 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. */
- char regvals[MAX_REGISTER_SIZE * 2];
+ gdb_byte regvals[MAX_REGISTER_SIZE * 2];
memset (regvals, 0, sizeof regvals);
memcpy (regvals, writebuf, TYPE_LENGTH (type));
regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 3,
}
enum return_value_convention
-ppc_sysv_abi_return_value (struct gdbarch *gdbarch, struct type *valtype,
- struct regcache *regcache, void *readbuf,
- const void *writebuf)
+ppc_sysv_abi_return_value (struct gdbarch *gdbarch, struct type *func_type,
+ 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);
enum return_value_convention
ppc_sysv_abi_broken_return_value (struct gdbarch *gdbarch,
+ struct type *func_type,
struct type *valtype,
struct regcache *regcache,
- void *readbuf, const void *writebuf)
+ gdb_byte *readbuf, const gdb_byte *writebuf)
{
return do_ppc_sysv_return_value (gdbarch, valtype, regcache, readbuf,
writebuf, 1);
int struct_return, CORE_ADDR struct_addr)
{
CORE_ADDR func_addr = find_function_addr (function, NULL);
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
- /* By this stage in the proceedings, SP has been decremented by "red
- zone size" + "struct return size". Fetch the stack-pointer from
- before this and use that as the BACK_CHAIN. */
- const CORE_ADDR back_chain = read_sp ();
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ ULONGEST back_chain;
/* See for-loop comment below. */
int write_pass;
/* Size of the Altivec's vector parameter region, the final value is
the possible values of tdep->wordsize. */
gdb_assert (tdep->wordsize == 8);
+ /* 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));
+
+ /* By this stage in the proceedings, SP has been decremented by "red
+ zone size" + "struct return size". Fetch the stack-pointer from
+ before this and use that as the BACK_CHAIN. */
+ regcache_cooked_read_unsigned (regcache, gdbarch_sp_regnum (gdbarch),
+ &back_chain);
+
/* Go through the argument list twice.
Pass 1: Compute the function call's stack space and register
{
/* During the first pass, GPARAM and VPARAM 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;
struct value *arg = args[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)
{
/* Floats and Doubles go in f1 .. f13. They also
memory. */
if (write_pass)
{
- if (ppc_floating_point_unit_p (current_gdbarch)
- && freg <= 13)
+ 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)
{
- char 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);
}
+ if (greg <= 10)
+ regcache_cooked_write (regcache,
+ tdep->ppc_gp0_regnum + greg,
+ regval);
+ }
+
+ 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)
{
- /* The ABI states "Single precision floating
- point values are mapped to the first word in
- a single doubleword" and "... floating point
- values mapped to the first eight doublewords
- of the parameter save area are also passed in
- general registers").
-
- This code interprets that to mean: store it,
- left aligned, in the general register. */
- char regval[MAX_REGISTER_SIZE];
- memset (regval, 0, sizeof regval);
- memcpy (regval, val, TYPE_LENGTH (type));
regcache_cooked_write (regcache,
tdep->ppc_gp0_regnum + greg,
- regval);
+ val);
+ if (greg <= 9)
+ regcache_cooked_write (regcache,
+ tdep->ppc_gp0_regnum + greg + 1,
+ val + 8);
}
write_memory (gparam, val, TYPE_LENGTH (type));
}
- /* Always consume parameter stack space. */
+ freg += 2;
+ greg += 2;
+ gparam = align_up (gparam + TYPE_LENGTH (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));
+ }
+
+ freg += 2;
+ greg += 2;
gparam = align_up (gparam + TYPE_LENGTH (type), tdep->wordsize);
}
else if (TYPE_LENGTH (type) == 16 && TYPE_VECTOR (type)
}
else if ((TYPE_CODE (type) == TYPE_CODE_INT
|| TYPE_CODE (type) == TYPE_CODE_ENUM
- || TYPE_CODE (type) == TYPE_CODE_PTR)
+ || 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
/* Convert any function code addresses into
descriptors. */
if (TYPE_CODE (type) == TYPE_CODE_PTR
- && TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC)
+ || TYPE_CODE (type) == TYPE_CODE_REF)
{
- CORE_ADDR desc = word;
- convert_code_addr_to_desc_addr (word, &desc);
- word = desc;
+ 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,
{
if (write_pass && greg <= 10)
{
- char regval[MAX_REGISTER_SIZE];
+ gdb_byte regval[MAX_REGISTER_SIZE];
int len = TYPE_LENGTH (type) - byte;
if (len > tdep->wordsize)
len = tdep->wordsize;
memset (regval, 0, sizeof regval);
- /* WARNING: cagney/2003-09-21: As best I can
- tell, the ABI specifies that the value should
- be left aligned. Unfortunately, GCC doesn't
- do this - it instead right aligns even sized
- values and puts odd sized values on the
- stack. Work around that by putting both a
- left and right aligned value into the
- register (hopefully no one notices :-^).
- Arrrgh! */
- /* Left aligned (8 byte values such as pointers
- fill the buffer). */
- memcpy (regval, val + byte, len);
- /* Right aligned (but only if even). */
- if (len == 1 || len == 2 || len == 4)
+ /* 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 (write_pass)
- /* WARNING: cagney/2004-06-20: It appears that GCC
- likes to put structures containing a single
- floating-point member in an FP register instead of
- general general purpose. */
+ {
+ /* 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);
}
}
/* Update %sp. */
- regcache_cooked_write_signed (regcache, SP_REGNUM, sp);
+ 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);
}
-/* The 64 bit ABI retun value convention.
+/* 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.,
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 *valtype,
- struct regcache *regcache, void *readbuf,
- const void *writebuf)
+ppc64_sysv_abi_return_value (struct gdbarch *gdbarch, struct type *func_type,
+ struct type *valtype, struct regcache *regcache,
+ gdb_byte *readbuf, const gdb_byte *writebuf)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
/* Floats and doubles in F1. */
if (TYPE_CODE (valtype) == TYPE_CODE_FLT && TYPE_LENGTH (valtype) <= 8)
{
- char regval[MAX_REGISTER_SIZE];
+ gdb_byte regval[MAX_REGISTER_SIZE];
struct type *regtype = register_type (gdbarch, tdep->ppc_fp0_regnum);
if (writebuf != NULL)
{
}
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_CODE (valtype) == TYPE_CODE_ENUM
+ || TYPE_CODE (valtype) == TYPE_CODE_CHAR
+ || TYPE_CODE (valtype) == TYPE_CODE_BOOL)
&& TYPE_LENGTH (valtype) <= 8)
{
- /* Integers in r3. */
if (writebuf != NULL)
{
/* Be careful to sign extend the value. */
return RETURN_VALUE_REGISTER_CONVENTION;
}
/* All pointers live in r3. */
- if (TYPE_CODE (valtype) == TYPE_CODE_PTR)
+ if (TYPE_CODE (valtype) == TYPE_CODE_PTR
+ || TYPE_CODE (valtype) == TYPE_CODE_REF)
{
/* All pointers live in r3. */
if (writebuf != NULL)
regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 3, readbuf);
return RETURN_VALUE_REGISTER_CONVENTION;
}
- 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)
+ /* Array type has more than one use. */
+ if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY)
{
/* Small character arrays are returned, right justified, in r3. */
- 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;
+ 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;
+ }
}
/* Big floating point values get stored in adjacent floating
- point registers. */
+ point registers, starting with F1. */
if (TYPE_CODE (valtype) == TYPE_CODE_FLT
&& (TYPE_LENGTH (valtype) == 16 || TYPE_LENGTH (valtype) == 32))
{
int i;
for (i = 0; i < 2; i++)
{
- char regval[MAX_REGISTER_SIZE];
+ gdb_byte regval[MAX_REGISTER_SIZE];
struct type *regtype =
- register_type (current_gdbarch, tdep->ppc_fp0_regnum);
+ register_type (gdbarch, tdep->ppc_fp0_regnum);
if (writebuf != NULL)
{
convert_typed_floating ((const bfd_byte *) writebuf +