/* Target-dependent code for GDB, the GNU debugger.
- Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996,
- 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software
- Foundation, Inc.
+ Copyright (C) 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
+ 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
+ Free Software Foundation, Inc.
This file is part of GDB.
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. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#include "defs.h"
#include "frame.h"
#include "frame-unwind.h"
#include "frame-base.h"
+#include "rs6000-tdep.h"
+
/* If the kernel has to deliver a signal, it pushes a sigcontext
structure on the stack and then calls the signal handler, passing
the address of the sigcontext in an argument register. Usually
struct reg
{
char *name; /* name of register */
- unsigned char sz32; /* size on 32-bit arch, 0 if nonextant */
- unsigned char sz64; /* size on 64-bit arch, 0 if nonextant */
+ unsigned char sz32; /* size on 32-bit arch, 0 if nonexistent */
+ unsigned char sz64; /* size on 64-bit arch, 0 if nonexistent */
unsigned char fpr; /* whether register is floating-point */
unsigned char pseudo; /* whether register is pseudo */
int spr_num; /* PowerPC SPR number, or -1 if not an SPR.
register number. */
};
-/* Breakpoint shadows for the single step instructions will be kept here. */
-
-static struct sstep_breaks
- {
- /* Address, or 0 if this is not in use. */
- CORE_ADDR address;
- /* Shadow contents. */
- char data[4];
- }
-stepBreaks[2];
-
/* Hook for determining the TOC address when calling functions in the
inferior under AIX. The initialization code in rs6000-nat.c sets
this hook to point to find_toc_address. */
static void
ppc_supply_reg (struct regcache *regcache, int regnum,
- const char *regs, size_t offset)
+ const gdb_byte *regs, size_t offset)
{
if (regnum != -1 && offset != -1)
regcache_raw_supply (regcache, regnum, regs + offset);
static void
ppc_collect_reg (const struct regcache *regcache, int regnum,
- char *regs, size_t offset)
+ gdb_byte *regs, size_t offset)
{
if (regnum != -1 && offset != -1)
regcache_raw_collect (regcache, regnum, regs + offset);
offset = offsets->f0_offset;
for (i = tdep->ppc_fp0_regnum;
i < tdep->ppc_fp0_regnum + ppc_num_fprs;
- i++, offset += 4)
+ i++, offset += 8)
{
if (regnum == -1 || regnum == i)
ppc_supply_reg (regcache, i, fpregs, offset);
offset = offsets->f0_offset;
for (i = tdep->ppc_fp0_regnum;
i <= tdep->ppc_fp0_regnum + ppc_num_fprs;
- i++, offset += 4)
+ i++, offset += 8)
{
if (regnum == -1 || regnum == i)
- ppc_collect_reg (regcache, regnum, fpregs, offset);
+ ppc_collect_reg (regcache, i, fpregs, offset);
}
if (regnum == -1 || regnum == tdep->ppc_fpscr_regnum)
return pc;
}
+static int
+insn_changes_sp_or_jumps (unsigned long insn)
+{
+ int opcode = (insn >> 26) & 0x03f;
+ int sd = (insn >> 21) & 0x01f;
+ int a = (insn >> 16) & 0x01f;
+ int subcode = (insn >> 1) & 0x3ff;
+
+ /* Changes the stack pointer. */
+
+ /* NOTE: There are many ways to change the value of a given register.
+ The ways below are those used when the register is R1, the SP,
+ in a funtion's epilogue. */
+
+ if (opcode == 31 && subcode == 444 && a == 1)
+ return 1; /* mr R1,Rn */
+ if (opcode == 14 && sd == 1)
+ return 1; /* addi R1,Rn,simm */
+ if (opcode == 58 && sd == 1)
+ return 1; /* ld R1,ds(Rn) */
+
+ /* Transfers control. */
+
+ if (opcode == 18)
+ return 1; /* b */
+ if (opcode == 16)
+ return 1; /* bc */
+ if (opcode == 19 && subcode == 16)
+ return 1; /* bclr */
+ if (opcode == 19 && subcode == 528)
+ return 1; /* bcctr */
+
+ return 0;
+}
+
+/* Return true if we are in the function's epilogue, i.e. after the
+ instruction that destroyed the function's stack frame.
+
+ 1) scan forward from the point of execution:
+ a) If you find an instruction that modifies the stack pointer
+ or transfers control (except a return), execution is not in
+ an epilogue, return.
+ b) Stop scanning if you find a return instruction or reach the
+ end of the function or reach the hard limit for the size of
+ an epilogue.
+ 2) scan backward from the point of execution:
+ a) If you find an instruction that modifies the stack pointer,
+ execution *is* in an epilogue, return.
+ b) Stop scanning if you reach an instruction that transfers
+ control or the beginning of the function or reach the hard
+ limit for the size of an epilogue. */
+
+static int
+rs6000_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc)
+{
+ bfd_byte insn_buf[PPC_INSN_SIZE];
+ CORE_ADDR scan_pc, func_start, func_end, epilogue_start, epilogue_end;
+ unsigned long insn;
+ struct frame_info *curfrm;
+
+ /* Find the search limits based on function boundaries and hard limit. */
+
+ if (!find_pc_partial_function (pc, NULL, &func_start, &func_end))
+ return 0;
+
+ epilogue_start = pc - PPC_MAX_EPILOGUE_INSTRUCTIONS * PPC_INSN_SIZE;
+ if (epilogue_start < func_start) epilogue_start = func_start;
+
+ epilogue_end = pc + PPC_MAX_EPILOGUE_INSTRUCTIONS * PPC_INSN_SIZE;
+ if (epilogue_end > func_end) epilogue_end = func_end;
+
+ curfrm = get_current_frame ();
+
+ /* Scan forward until next 'blr'. */
+
+ for (scan_pc = pc; scan_pc < epilogue_end; scan_pc += PPC_INSN_SIZE)
+ {
+ if (!safe_frame_unwind_memory (curfrm, scan_pc, insn_buf, PPC_INSN_SIZE))
+ return 0;
+ insn = extract_signed_integer (insn_buf, PPC_INSN_SIZE);
+ if (insn == 0x4e800020)
+ break;
+ if (insn_changes_sp_or_jumps (insn))
+ return 0;
+ }
+
+ /* Scan backward until adjustment to stack pointer (R1). */
+
+ for (scan_pc = pc - PPC_INSN_SIZE;
+ scan_pc >= epilogue_start;
+ scan_pc -= PPC_INSN_SIZE)
+ {
+ if (!safe_frame_unwind_memory (curfrm, scan_pc, insn_buf, PPC_INSN_SIZE))
+ return 0;
+ insn = extract_signed_integer (insn_buf, PPC_INSN_SIZE);
+ if (insn_changes_sp_or_jumps (insn))
+ return 1;
+ }
+
+ return 0;
+}
+
/* Fill in fi->saved_regs */
rs6000_fetch_pointer_argument (struct frame_info *frame, int argi,
struct type *type)
{
- CORE_ADDR addr;
- get_frame_register (frame, 3 + argi, &addr);
- return addr;
+ return get_frame_register_unsigned (frame, 3 + argi);
}
/* Calculate the destination of a branch/jump. Return -1 if not a branch. */
{
CORE_ADDR dummy;
int breakp_sz;
- const char *breakp = rs6000_breakpoint_from_pc (&dummy, &breakp_sz);
+ const gdb_byte *breakp = rs6000_breakpoint_from_pc (&dummy, &breakp_sz);
int ii, insn;
CORE_ADDR loc;
CORE_ADDR breaks[2];
if (insert_breakpoints_p)
{
-
loc = read_pc ();
insn = read_memory_integer (loc, 4);
if (breaks[1] == breaks[0])
breaks[1] = -1;
- stepBreaks[1].address = 0;
-
for (ii = 0; ii < 2; ++ii)
{
-
/* ignore invalid breakpoint. */
if (breaks[ii] == -1)
continue;
- target_insert_breakpoint (breaks[ii], stepBreaks[ii].data);
- stepBreaks[ii].address = breaks[ii];
+ insert_single_step_breakpoint (breaks[ii]);
}
-
}
else
- {
+ remove_single_step_breakpoints ();
- /* remove step breakpoints. */
- for (ii = 0; ii < 2; ++ii)
- if (stepBreaks[ii].address != 0)
- target_remove_breakpoint (stepBreaks[ii].address,
- stepBreaks[ii].data);
- }
errno = 0; /* FIXME, don't ignore errors! */
/* What errors? {read,write}_memory call error(). */
}
CORE_ADDR orig_pc = pc;
CORE_ADDR last_prologue_pc = pc;
CORE_ADDR li_found_pc = 0;
- char buf[4];
+ gdb_byte buf[4];
unsigned long op;
long offset = 0;
long vr_saved_offset = 0;
remember just the first one, but skip over additional
ones. */
- if (lr_reg < 0)
+ if (lr_reg == -1)
lr_reg = (op & 0x03e00000);
if (lr_reg == 0)
r0_contains_arg = 0;
continue;
}
+ else if ((op & 0xfe80ffff) == 0x42800005 && lr_reg != -1)
+ {
+ /* bcl 20,xx,.+4 is used to get the current PC, with or without
+ prediction bits. If the LR has already been saved, we can
+ skip it. */
+ continue;
+ }
else if (op == 0x48000005)
{ /* bl .+4 used in
-mrelocatable */
fdata->frameless = 0;
/* Don't skip over the subroutine call if it is not within
- the first three instructions of the prologue. */
+ the first three instructions of the prologue and either
+ we have no line table information or the line info tells
+ us that the subroutine call is not part of the line
+ associated with the prologue. */
if ((pc - orig_pc) > 8)
- break;
+ {
+ struct symtab_and_line prologue_sal = find_pc_line (orig_pc, 0);
+ struct symtab_and_line this_sal = find_pc_line (pc, 0);
+
+ if ((prologue_sal.line == 0) || (prologue_sal.line != this_sal.line))
+ break;
+ }
op = read_memory_integer (pc + 4, 4);
int len = 0;
int argno; /* current argument number */
int argbytes; /* current argument byte */
- char tmp_buffer[50];
+ gdb_byte tmp_buffer[50];
int f_argno = 0; /* current floating point argno */
int wordsize = gdbarch_tdep (current_gdbarch)->wordsize;
CORE_ADDR func_addr = find_function_addr (function, NULL);
int reg_size = register_size (current_gdbarch, ii + 3);
arg = args[argno];
- type = check_typedef (VALUE_TYPE (arg));
+ type = check_typedef (value_type (arg));
len = TYPE_LENGTH (type);
if (TYPE_CODE (type) == TYPE_CODE_FLT)
regcache_cooked_write (regcache,
tdep->ppc_fp0_regnum + 1 + f_argno,
- VALUE_CONTENTS (arg));
+ value_contents (arg));
++f_argno;
}
/* Argument takes more than one register. */
while (argbytes < len)
{
- char word[MAX_REGISTER_SIZE];
+ gdb_byte word[MAX_REGISTER_SIZE];
memset (word, 0, reg_size);
memcpy (word,
- ((char *) VALUE_CONTENTS (arg)) + argbytes,
+ ((char *) value_contents (arg)) + argbytes,
(len - argbytes) > reg_size
? reg_size : len - argbytes);
regcache_cooked_write (regcache,
{
/* Argument can fit in one register. No problem. */
int adj = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? reg_size - len : 0;
- char word[MAX_REGISTER_SIZE];
+ gdb_byte word[MAX_REGISTER_SIZE];
memset (word, 0, reg_size);
- memcpy (word, VALUE_CONTENTS (arg), len);
+ memcpy (word, value_contents (arg), len);
regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 3 +ii, word);
}
++argno;
for (; jj < nargs; ++jj)
{
struct value *val = args[jj];
- space += ((TYPE_LENGTH (VALUE_TYPE (val))) + 3) & -4;
+ space += ((TYPE_LENGTH (value_type (val))) + 3) & -4;
}
/* Add location required for the rest of the parameters. */
if (argbytes)
{
write_memory (sp + 24 + (ii * 4),
- ((char *) VALUE_CONTENTS (arg)) + argbytes,
+ value_contents (arg) + argbytes,
len - argbytes);
++argno;
ii += ((len - argbytes + 3) & -4) / 4;
{
arg = args[argno];
- type = check_typedef (VALUE_TYPE (arg));
+ type = check_typedef (value_type (arg));
len = TYPE_LENGTH (type);
regcache_cooked_write (regcache,
tdep->ppc_fp0_regnum + 1 + f_argno,
- VALUE_CONTENTS (arg));
+ value_contents (arg));
++f_argno;
}
- write_memory (sp + 24 + (ii * 4),
- (char *) VALUE_CONTENTS (arg),
- len);
+ write_memory (sp + 24 + (ii * 4), value_contents (arg), len);
ii += ((len + 3) & -4) / 4;
}
}
regcache_raw_write_signed (regcache, SP_REGNUM, sp);
/* Set back chain properly. */
- store_unsigned_integer (tmp_buffer, 4, saved_sp);
- write_memory (sp, tmp_buffer, 4);
+ store_unsigned_integer (tmp_buffer, wordsize, saved_sp);
+ write_memory (sp, tmp_buffer, wordsize);
/* Point the inferior function call's return address at the dummy's
breakpoint. */
return sp;
}
-/* PowerOpen always puts structures in memory. Vectors, which were
- added later, do get returned in a register though. */
-
-static int
-rs6000_use_struct_convention (int gcc_p, struct type *value_type)
-{
- if ((TYPE_LENGTH (value_type) == 16 || TYPE_LENGTH (value_type) == 8)
- && TYPE_VECTOR (value_type))
- return 0;
- return 1;
-}
-
-static void
-rs6000_extract_return_value (struct type *valtype, char *regbuf, char *valbuf)
+static enum return_value_convention
+rs6000_return_value (struct gdbarch *gdbarch, struct type *valtype,
+ struct regcache *regcache, gdb_byte *readbuf,
+ const gdb_byte *writebuf)
{
- int offset = 0;
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+ gdb_byte buf[8];
/* The calling convention this function implements assumes the
processor has floating-point registers. We shouldn't be using it
- on PPC variants that lack them. */
+ on PowerPC variants that lack them. */
gdb_assert (ppc_floating_point_unit_p (current_gdbarch));
- if (TYPE_CODE (valtype) == TYPE_CODE_FLT)
+ /* AltiVec extension: Functions that declare a vector data type as a
+ return value place that return value in VR2. */
+ if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY && TYPE_VECTOR (valtype)
+ && TYPE_LENGTH (valtype) == 16)
{
+ if (readbuf)
+ regcache_cooked_read (regcache, tdep->ppc_vr0_regnum + 2, readbuf);
+ if (writebuf)
+ regcache_cooked_write (regcache, tdep->ppc_vr0_regnum + 2, writebuf);
- /* floats and doubles are returned in fpr1. fpr's have a size of 8 bytes.
- We need to truncate the return value into float size (4 byte) if
- necessary. */
-
- convert_typed_floating (®buf[DEPRECATED_REGISTER_BYTE
- (tdep->ppc_fp0_regnum + 1)],
- builtin_type_double,
- valbuf,
- valtype);
+ return RETURN_VALUE_REGISTER_CONVENTION;
}
- else if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY
- && TYPE_LENGTH (valtype) == 16
- && TYPE_VECTOR (valtype))
+
+ /* If the called subprogram returns an aggregate, there exists an
+ implicit first argument, whose value is the address of a caller-
+ allocated buffer into which the callee is assumed to store its
+ return value. All explicit parameters are appropriately
+ relabeled. */
+ if (TYPE_CODE (valtype) == TYPE_CODE_STRUCT
+ || TYPE_CODE (valtype) == TYPE_CODE_UNION
+ || TYPE_CODE (valtype) == TYPE_CODE_ARRAY)
+ return RETURN_VALUE_STRUCT_CONVENTION;
+
+ /* Scalar floating-point values are returned in FPR1 for float or
+ double, and in FPR1:FPR2 for quadword precision. Fortran
+ complex*8 and complex*16 are returned in FPR1:FPR2, and
+ complex*32 is returned in FPR1:FPR4. */
+ if (TYPE_CODE (valtype) == TYPE_CODE_FLT
+ && (TYPE_LENGTH (valtype) == 4 || TYPE_LENGTH (valtype) == 8))
+ {
+ struct type *regtype = register_type (gdbarch, tdep->ppc_fp0_regnum);
+ gdb_byte regval[8];
+
+ /* FIXME: kettenis/2007-01-01: Add support for quadword
+ precision and complex. */
+
+ if (readbuf)
+ {
+ regcache_cooked_read (regcache, tdep->ppc_fp0_regnum + 1, regval);
+ convert_typed_floating (regval, regtype, readbuf, valtype);
+ }
+ if (writebuf)
+ {
+ convert_typed_floating (writebuf, valtype, regval, regtype);
+ regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 1, regval);
+ }
+
+ return RETURN_VALUE_REGISTER_CONVENTION;
+ }
+
+ /* Values of the types int, long, short, pointer, and char (length
+ is less than or equal to four bytes), as well as bit values of
+ lengths less than or equal to 32 bits, must be returned right
+ justified in GPR3 with signed values sign extended and unsigned
+ values zero extended, as necessary. */
+ if (TYPE_LENGTH (valtype) <= tdep->wordsize)
{
- memcpy (valbuf, regbuf + DEPRECATED_REGISTER_BYTE (tdep->ppc_vr0_regnum + 2),
- TYPE_LENGTH (valtype));
+ if (readbuf)
+ {
+ ULONGEST regval;
+
+ /* For reading we don't have to worry about sign extension. */
+ regcache_cooked_read_unsigned (regcache, tdep->ppc_gp0_regnum + 3,
+ ®val);
+ store_unsigned_integer (readbuf, TYPE_LENGTH (valtype), regval);
+ }
+ if (writebuf)
+ {
+ /* For writing, use unpack_long since that should handle any
+ required sign extension. */
+ regcache_cooked_write_unsigned (regcache, tdep->ppc_gp0_regnum + 3,
+ unpack_long (valtype, writebuf));
+ }
+
+ return RETURN_VALUE_REGISTER_CONVENTION;
}
- else
+
+ /* Eight-byte non-floating-point scalar values must be returned in
+ GPR3:GPR4. */
+
+ if (TYPE_LENGTH (valtype) == 8)
{
- /* return value is copied starting from r3. */
- if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG
- && TYPE_LENGTH (valtype) < register_size (current_gdbarch, 3))
- offset = register_size (current_gdbarch, 3) - TYPE_LENGTH (valtype);
-
- memcpy (valbuf,
- regbuf + DEPRECATED_REGISTER_BYTE (3) + offset,
- TYPE_LENGTH (valtype));
+ gdb_assert (TYPE_CODE (valtype) != TYPE_CODE_FLT);
+ gdb_assert (tdep->wordsize == 4);
+
+ if (readbuf)
+ {
+ gdb_byte regval[8];
+
+ regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 3, regval);
+ regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 4,
+ regval + 4);
+ memcpy (readbuf, regval, 8);
+ }
+ if (writebuf)
+ {
+ regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 3, writebuf);
+ regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 4,
+ writebuf + 4);
+ }
+
+ return RETURN_VALUE_REGISTER_CONVENTION;
}
+
+ return RETURN_VALUE_STRUCT_CONVENTION;
}
/* Return whether handle_inferior_event() should proceed through code
back to where execution should continue.
GDB should silently step over @FIX code, just like AIX dbx does.
- Unfortunately, the linker uses the "b" instruction for the branches,
- meaning that the link register doesn't get set. Therefore, GDB's usual
- step_over_function() mechanism won't work.
+ Unfortunately, the linker uses the "b" instruction for the
+ branches, meaning that the link register doesn't get set.
+ Therefore, GDB's usual step_over_function () mechanism won't work.
- Instead, use the IN_SOLIB_RETURN_TRAMPOLINE and SKIP_TRAMPOLINE_CODE hooks
- in handle_inferior_event() to skip past @FIX code. */
+ Instead, use the IN_SOLIB_RETURN_TRAMPOLINE and
+ SKIP_TRAMPOLINE_CODE hooks in handle_inferior_event() to skip past
+ @FIX code. */
int
rs6000_in_solib_return_trampoline (CORE_ADDR pc, char *name)
/* Check for bigtoc fixup code. */
msymbol = lookup_minimal_symbol_by_pc (pc);
- if (msymbol && rs6000_in_solib_return_trampoline (pc, DEPRECATED_SYMBOL_NAME (msymbol)))
+ if (msymbol
+ && rs6000_in_solib_return_trampoline (pc,
+ DEPRECATED_SYMBOL_NAME (msymbol)))
{
/* Double-check that the third instruction from PC is relative "b". */
op = read_memory_integer (pc + 8, 4);
return builtin_type_vec128;
break;
default:
- internal_error (__FILE__, __LINE__, "Register %d size %d unknown",
+ internal_error (__FILE__, __LINE__, _("Register %d size %d unknown"),
n, size);
}
}
}
+/* Is REGNUM a member of REGGROUP? */
+static int
+rs6000_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
+ struct reggroup *group)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ int float_p;
+ int vector_p;
+ int general_p;
+
+ if (REGISTER_NAME (regnum) == NULL
+ || *REGISTER_NAME (regnum) == '\0')
+ return 0;
+ if (group == all_reggroup)
+ return 1;
+
+ float_p = (regnum == tdep->ppc_fpscr_regnum
+ || (regnum >= tdep->ppc_fp0_regnum
+ && regnum < tdep->ppc_fp0_regnum + 32));
+ if (group == float_reggroup)
+ return float_p;
+
+ vector_p = ((tdep->ppc_vr0_regnum >= 0
+ && regnum >= tdep->ppc_vr0_regnum
+ && regnum < tdep->ppc_vr0_regnum + 32)
+ || (tdep->ppc_ev0_regnum >= 0
+ && regnum >= tdep->ppc_ev0_regnum
+ && regnum < tdep->ppc_ev0_regnum + 32)
+ || regnum == tdep->ppc_vrsave_regnum - 1 /* vscr */
+ || regnum == tdep->ppc_vrsave_regnum
+ || regnum == tdep->ppc_acc_regnum
+ || regnum == tdep->ppc_spefscr_regnum);
+ if (group == vector_reggroup)
+ return vector_p;
+
+ /* Note that PS aka MSR isn't included - it's a system register (and
+ besides, due to GCC's CFI foobar you do not want to restore
+ it). */
+ general_p = ((regnum >= tdep->ppc_gp0_regnum
+ && regnum < tdep->ppc_gp0_regnum + 32)
+ || regnum == tdep->ppc_toc_regnum
+ || regnum == tdep->ppc_cr_regnum
+ || regnum == tdep->ppc_lr_regnum
+ || regnum == tdep->ppc_ctr_regnum
+ || regnum == tdep->ppc_xer_regnum
+ || regnum == PC_REGNUM);
+ if (group == general_reggroup)
+ return general_p;
+
+ if (group == save_reggroup || group == restore_reggroup)
+ return general_p || vector_p || float_p;
+
+ return 0;
+}
+
/* The register format for RS/6000 floating point registers is always
double, we need a conversion if the memory format is float. */
rs6000_register_to_value (struct frame_info *frame,
int regnum,
struct type *type,
- void *to)
+ gdb_byte *to)
{
const struct reg *reg = gdbarch_tdep (current_gdbarch)->regs + regnum;
- char from[MAX_REGISTER_SIZE];
+ gdb_byte from[MAX_REGISTER_SIZE];
gdb_assert (reg->fpr);
gdb_assert (TYPE_CODE (type) == TYPE_CODE_FLT);
rs6000_value_to_register (struct frame_info *frame,
int regnum,
struct type *type,
- const void *from)
+ const gdb_byte *from)
{
const struct reg *reg = gdbarch_tdep (current_gdbarch)->regs + regnum;
- char to[MAX_REGISTER_SIZE];
+ gdb_byte to[MAX_REGISTER_SIZE];
gdb_assert (reg->fpr);
gdb_assert (TYPE_CODE (type) == TYPE_CODE_FLT);
co-variant type qualifiers, ... */
static void
e500_move_ev_register (void (*move) (struct regcache *regcache,
- int regnum, void *buf),
+ int regnum, gdb_byte *buf),
struct regcache *regcache, int ev_reg,
- void *buffer)
+ gdb_byte *buffer)
{
struct gdbarch *arch = get_regcache_arch (regcache);
struct gdbarch_tdep *tdep = gdbarch_tdep (arch);
int reg_index;
- char *byte_buffer = buffer;
+ gdb_byte *byte_buffer = buffer;
gdb_assert (tdep->ppc_ev0_regnum <= ev_reg
&& ev_reg < tdep->ppc_ev0_regnum + ppc_num_gprs);
static void
e500_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
- int reg_nr, void *buffer)
+ int reg_nr, gdb_byte *buffer)
{
struct gdbarch *regcache_arch = get_regcache_arch (regcache);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
e500_move_ev_register (regcache_raw_read, regcache, reg_nr, buffer);
else
internal_error (__FILE__, __LINE__,
- "e500_pseudo_register_read: "
- "called on unexpected register '%s' (%d)",
+ _("e500_pseudo_register_read: "
+ "called on unexpected register '%s' (%d)"),
gdbarch_register_name (gdbarch, reg_nr), reg_nr);
}
static void
e500_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
- int reg_nr, const void *buffer)
+ int reg_nr, const gdb_byte *buffer)
{
struct gdbarch *regcache_arch = get_regcache_arch (regcache);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
if (tdep->ppc_ev0_regnum <= reg_nr
&& reg_nr < tdep->ppc_ev0_regnum + ppc_num_gprs)
- e500_move_ev_register ((void (*) (struct regcache *, int, void *))
+ e500_move_ev_register ((void (*) (struct regcache *, int, gdb_byte *))
regcache_raw_write,
- regcache, reg_nr, (void *) buffer);
+ regcache, reg_nr, (gdb_byte *) buffer);
else
internal_error (__FILE__, __LINE__,
- "e500_pseudo_register_read: "
- "called on unexpected register '%s' (%d)",
+ _("e500_pseudo_register_read: "
+ "called on unexpected register '%s' (%d)"),
gdbarch_register_name (gdbarch, reg_nr), reg_nr);
}
}
}
-
-static void
-rs6000_store_return_value (struct type *type,
- struct regcache *regcache,
- const void *valbuf)
-{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- int regnum = -1;
-
- /* The calling convention this function implements assumes the
- processor has floating-point registers. We shouldn't be using it
- on PPC variants that lack them. */
- gdb_assert (ppc_floating_point_unit_p (gdbarch));
-
- if (TYPE_CODE (type) == TYPE_CODE_FLT)
- /* Floating point values are returned starting from FPR1 and up.
- Say a double_double_double type could be returned in
- FPR1/FPR2/FPR3 triple. */
- regnum = tdep->ppc_fp0_regnum + 1;
- else if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
- {
- if (TYPE_LENGTH (type) == 16
- && TYPE_VECTOR (type))
- regnum = tdep->ppc_vr0_regnum + 2;
- else
- internal_error (__FILE__, __LINE__,
- "rs6000_store_return_value: "
- "unexpected array return type");
- }
- else
- /* Everything else is returned in GPR3 and up. */
- regnum = tdep->ppc_gp0_regnum + 3;
-
- {
- size_t bytes_written = 0;
-
- while (bytes_written < TYPE_LENGTH (type))
- {
- /* How much of this value can we write to this register? */
- size_t bytes_to_write = min (TYPE_LENGTH (type) - bytes_written,
- register_size (gdbarch, regnum));
- regcache_cooked_write_part (regcache, regnum,
- 0, bytes_to_write,
- (char *) valbuf + bytes_written);
- regnum++;
- bytes_written += bytes_to_write;
- }
- }
-}
-
-
-/* Extract from an array REGBUF containing the (raw) register state
- the address in which a function should return its structure value,
- as a CORE_ADDR (or an expression that can be used as one). */
-
-static CORE_ADDR
-rs6000_extract_struct_value_address (struct regcache *regcache)
-{
- /* FIXME: cagney/2002-09-26: PR gdb/724: When making an inferior
- function call GDB knows the address of the struct return value
- and hence, should not need to call this function. Unfortunately,
- the current call_function_by_hand() code only saves the most
- recent struct address leading to occasional calls. The code
- should instead maintain a stack of such addresses (in the dummy
- frame object). */
- /* NOTE: cagney/2002-09-26: Return 0 which indicates that we've
- really got no idea where the return value is being stored. While
- r3, on function entry, contained the address it will have since
- been reused (scratch) and hence wouldn't be valid */
- return 0;
-}
-
/* Hook called when a new child process is started. */
void
Usually a function pointer's representation is simply the address
of the function. On the RS/6000 however, a function pointer is
- represented by a pointer to a TOC entry. This TOC entry contains
+ represented by a pointer to an OPD entry. This OPD entry contains
three words, the first word is the address of the function, the
second word is the TOC pointer (r2), and the third word is the
static chain value. Throughout GDB it is currently assumed that a
function pointer contains the address of the function, which is not
easy to fix. In addition, the conversion of a function address to
- a function pointer would require allocation of a TOC entry in the
+ a function pointer would require allocation of an OPD entry in the
inferior's memory space, with all its drawbacks. To be able to
call C++ virtual methods in the inferior (which are called via
function pointers), find_function_addr uses this function to get the
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
struct rs6000_framedata fdata;
int wordsize = tdep->wordsize;
+ CORE_ADDR func, pc;
if ((*this_cache) != NULL)
return (*this_cache);
(*this_cache) = cache;
cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
- skip_prologue (frame_func_unwind (next_frame), frame_pc_unwind (next_frame),
- &fdata);
-
- /* If there were any saved registers, figure out parent's stack
- pointer. */
- /* The following is true only if the frame doesn't have a call to
- alloca(), FIXME. */
-
- if (fdata.saved_fpr == 0
- && fdata.saved_gpr == 0
- && fdata.saved_vr == 0
- && fdata.saved_ev == 0
- && fdata.lr_offset == 0
- && fdata.cr_offset == 0
- && fdata.vr_offset == 0
- && fdata.ev_offset == 0)
- cache->base = frame_unwind_register_unsigned (next_frame, SP_REGNUM);
- else
+ func = frame_func_unwind (next_frame);
+ pc = frame_pc_unwind (next_frame);
+ skip_prologue (func, pc, &fdata);
+
+ /* Figure out the parent's stack pointer. */
+
+ /* NOTE: cagney/2002-04-14: The ->frame points to the inner-most
+ address of the current frame. Things might be easier if the
+ ->frame pointed to the outer-most address of the frame. In
+ the mean time, the address of the prev frame is used as the
+ base address of this frame. */
+ cache->base = frame_unwind_register_unsigned (next_frame, SP_REGNUM);
+
+ /* If the function appears to be frameless, check a couple of likely
+ indicators that we have simply failed to find the frame setup.
+ Two common cases of this are missing symbols (i.e.
+ frame_func_unwind returns the wrong address or 0), and assembly
+ stubs which have a fast exit path but set up a frame on the slow
+ path.
+
+ If the LR appears to return to this function, then presume that
+ we have an ABI compliant frame that we failed to find. */
+ if (fdata.frameless && fdata.lr_offset == 0)
{
- /* NOTE: cagney/2002-04-14: The ->frame points to the inner-most
- address of the current frame. Things might be easier if the
- ->frame pointed to the outer-most address of the frame. In
- the mean time, the address of the prev frame is used as the
- base address of this frame. */
- cache->base = frame_unwind_register_unsigned (next_frame, SP_REGNUM);
- if (!fdata.frameless)
- /* Frameless really means stackless. */
- cache->base = read_memory_addr (cache->base, wordsize);
+ CORE_ADDR saved_lr;
+ int make_frame = 0;
+
+ saved_lr = frame_unwind_register_unsigned (next_frame,
+ tdep->ppc_lr_regnum);
+ if (func == 0 && saved_lr == pc)
+ make_frame = 1;
+ else if (func != 0)
+ {
+ CORE_ADDR saved_func = get_pc_function_start (saved_lr);
+ if (func == saved_func)
+ make_frame = 1;
+ }
+
+ if (make_frame)
+ {
+ fdata.frameless = 0;
+ fdata.lr_offset = wordsize;
+ }
}
+
+ if (!fdata.frameless)
+ /* Frameless really means stackless. */
+ cache->base = read_memory_addr (cache->base, wordsize);
+
trad_frame_set_value (cache->saved_regs, SP_REGNUM, cache->base);
/* if != -1, fdata.saved_fpr is the smallest number of saved_fpr.
void **this_cache,
int regnum, int *optimizedp,
enum lval_type *lvalp, CORE_ADDR *addrp,
- int *realnump, void *valuep)
+ int *realnump, gdb_byte *valuep)
{
struct rs6000_frame_cache *info = rs6000_frame_cache (next_frame,
this_cache);
else if (sysv_abi && wordsize == 4)
set_gdbarch_return_value (gdbarch, ppc_sysv_abi_return_value);
else
- {
- set_gdbarch_deprecated_extract_return_value (gdbarch, rs6000_extract_return_value);
- set_gdbarch_store_return_value (gdbarch, rs6000_store_return_value);
- }
+ set_gdbarch_return_value (gdbarch, rs6000_return_value);
/* Set lr_frame_offset. */
if (wordsize == 8)
}
else
internal_error (__FILE__, __LINE__,
- "rs6000_gdbarch_init: "
- "received unexpected BFD 'arch' value");
+ _("rs6000_gdbarch_init: "
+ "received unexpected BFD 'arch' value"));
+
+ set_gdbarch_have_nonsteppable_watchpoint (gdbarch, 1);
/* Sanity check on registers. */
gdb_assert (strcmp (tdep->regs[tdep->ppc_gp0_regnum].name, "r0") == 0);
set_gdbarch_num_pseudo_regs (gdbarch, v->npregs);
set_gdbarch_register_name (gdbarch, rs6000_register_name);
set_gdbarch_register_type (gdbarch, rs6000_register_type);
+ set_gdbarch_register_reggroup_p (gdbarch, rs6000_register_reggroup_p);
set_gdbarch_ptr_bit (gdbarch, wordsize * TARGET_CHAR_BIT);
set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT);
set_gdbarch_stab_reg_to_regnum (gdbarch, rs6000_stab_reg_to_regnum);
set_gdbarch_dwarf2_reg_to_regnum (gdbarch, rs6000_dwarf2_reg_to_regnum);
- /* Note: kevinb/2002-04-12: I'm not convinced that rs6000_push_arguments()
- is correct for the SysV ABI when the wordsize is 8, but I'm also
- fairly certain that ppc_sysv_abi_push_arguments() will give even
- worse results since it only works for 32-bit code. So, for the moment,
- we're better off calling rs6000_push_arguments() since it works for
- 64-bit code. At some point in the future, this matter needs to be
- revisited. */
+
if (sysv_abi && wordsize == 4)
set_gdbarch_push_dummy_call (gdbarch, ppc_sysv_abi_push_dummy_call);
else if (sysv_abi && wordsize == 8)
else
set_gdbarch_push_dummy_call (gdbarch, rs6000_push_dummy_call);
- set_gdbarch_deprecated_extract_struct_value_address (gdbarch, rs6000_extract_struct_value_address);
-
set_gdbarch_skip_prologue (gdbarch, rs6000_skip_prologue);
+ set_gdbarch_in_function_epilogue_p (gdbarch, rs6000_in_function_epilogue_p);
+
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
set_gdbarch_breakpoint_from_pc (gdbarch, rs6000_breakpoint_from_pc);
/* Not sure on this. FIXMEmgo */
set_gdbarch_frame_args_skip (gdbarch, 8);
- if (!sysv_abi)
- set_gdbarch_deprecated_use_struct_convention (gdbarch, rs6000_use_struct_convention);
-
if (!sysv_abi)
{
/* Handle RS/6000 function pointers (which are really function
switch (info.osabi)
{
+ case GDB_OSABI_LINUX:
+ /* FIXME: pgilliam/2005-10-21: Assume all PowerPC 64-bit linux systems
+ have altivec registers. If not, ptrace will fail the first time it's
+ called to access one and will not be called again. This wart will
+ be removed when Daniel Jacobowitz's proposal for autodetecting target
+ registers is implemented. */
+ if ((v->arch == bfd_arch_powerpc) && ((v->mach)== bfd_mach_ppc64))
+ {
+ tdep->ppc_vr0_regnum = 71;
+ tdep->ppc_vrsave_regnum = 104;
+ }
+ /* Fall Thru */
case GDB_OSABI_NETBSD_AOUT:
case GDB_OSABI_NETBSD_ELF:
case GDB_OSABI_UNKNOWN:
- case GDB_OSABI_LINUX:
set_gdbarch_unwind_pc (gdbarch, rs6000_unwind_pc);
frame_unwind_append_sniffer (gdbarch, rs6000_frame_sniffer);
set_gdbarch_unwind_dummy_id (gdbarch, rs6000_unwind_dummy_id);
frame_base_append_sniffer (gdbarch, rs6000_frame_base_sniffer);
}
- if (from_xcoff_exec)
- {
- /* NOTE: jimix/2003-06-09: This test should really check for
- GDB_OSABI_AIX when that is defined and becomes
- available. (Actually, once things are properly split apart,
- the test goes away.) */
- /* RS6000/AIX does not support PT_STEP. Has to be simulated. */
- set_gdbarch_software_single_step (gdbarch, rs6000_software_single_step);
- }
-
init_sim_regno_table (gdbarch);
return gdbarch;
/* FIXME: Dump gdbarch_tdep. */
}
-static struct cmd_list_element *info_powerpc_cmdlist = NULL;
-
-static void
-rs6000_info_powerpc_command (char *args, int from_tty)
-{
- help_list (info_powerpc_cmdlist, "info powerpc ", class_info, gdb_stdout);
-}
-
/* Initialization code. */
extern initialize_file_ftype _initialize_rs6000_tdep; /* -Wmissing-prototypes */
{
gdbarch_register (bfd_arch_rs6000, rs6000_gdbarch_init, rs6000_dump_tdep);
gdbarch_register (bfd_arch_powerpc, rs6000_gdbarch_init, rs6000_dump_tdep);
-
- /* Add root prefix command for "info powerpc" commands */
- add_prefix_cmd ("powerpc", class_info, rs6000_info_powerpc_command,
- "Various POWERPC info specific commands.",
- &info_powerpc_cmdlist, "info powerpc ", 0, &infolist);
}
projects / thirdparty / binutils-gdb.git / blobdiff