#include "defs.h"
#include "frame.h"
#include "inferior.h"
#include "symtab.h"
#include "target.h"
#include "gdbcore.h"
#include "gdbcmd.h"
#include "symfile.h"
#include "objfiles.h"
#include "arch-utils.h"
#include "regcache.h"
#include "doublest.h"
#include "value.h"
#include "parser-defs.h"
#include "libbfd.h"
#include "coff/internal.h"
#include "libcoff.h"
#include "elf-bfd.h"
#include "solib-svr4.h"
#include "ppc-tdep.h"
#define SIG_FRAME_PC_OFFSET 96
#define SIG_FRAME_LR_OFFSET 108
#define SIG_FRAME_FP_OFFSET 284
struct rs6000_framedata
{
int offset;
int saved_gpr;
int saved_fpr;
int saved_vr;
int alloca_reg;
char frameless;
char nosavedpc;
int gpr_offset;
int fpr_offset;
int vr_offset;
int lr_offset;
int cr_offset;
int vrsave_offset;
};
struct reg
{
char *name;
unsigned char sz32;
unsigned char sz64;
unsigned char fpr;
};
#define TDEP gdbarch_tdep (current_gdbarch)
static struct sstep_breaks
{
CORE_ADDR address;
char data[4];
}
stepBreaks[2];
CORE_ADDR (*rs6000_find_toc_address_hook) (CORE_ADDR) = NULL;
void (*rs6000_set_host_arch_hook) (int) = NULL;
static CORE_ADDR branch_dest (int opcode, int instr, CORE_ADDR pc,
CORE_ADDR safety);
static CORE_ADDR skip_prologue (CORE_ADDR, CORE_ADDR,
struct rs6000_framedata *);
static void frame_get_saved_regs (struct frame_info * fi,
struct rs6000_framedata * fdatap);
static CORE_ADDR frame_initial_stack_address (struct frame_info *);
static CORE_ADDR
read_memory_addr (CORE_ADDR memaddr, int len)
{
return read_memory_unsigned_integer (memaddr, len);
}
static CORE_ADDR
rs6000_skip_prologue (CORE_ADDR pc)
{
struct rs6000_framedata frame;
pc = skip_prologue (pc, 0, &frame);
return pc;
}
struct frame_extra_info
{
CORE_ADDR initial_sp;
};
void
rs6000_init_extra_frame_info (int fromleaf, struct frame_info *fi)
{
fi->extra_info = (struct frame_extra_info *)
frame_obstack_alloc (sizeof (struct frame_extra_info));
fi->extra_info->initial_sp = 0;
if (fi->next != (CORE_ADDR) 0
&& fi->pc < TEXT_SEGMENT_BASE)
fi->signal_handler_caller = 1;
}
void
rs6000_frame_init_saved_regs (struct frame_info *fi)
{
frame_get_saved_regs (fi, NULL);
}
static CORE_ADDR
rs6000_frame_args_address (struct frame_info *fi)
{
if (fi->extra_info->initial_sp != 0)
return fi->extra_info->initial_sp;
else
return frame_initial_stack_address (fi);
}
static CORE_ADDR
rs6000_saved_pc_after_call (struct frame_info *fi)
{
return read_register (gdbarch_tdep (current_gdbarch)->ppc_lr_regnum);
}
static CORE_ADDR
branch_dest (int opcode, int instr, CORE_ADDR pc, CORE_ADDR safety)
{
CORE_ADDR dest;
int immediate;
int absolute;
int ext_op;
absolute = (int) ((instr >> 1) & 1);
switch (opcode)
{
case 18:
immediate = ((instr & ~3) << 6) >> 6;
if (absolute)
dest = immediate;
else
dest = pc + immediate;
break;
case 16:
immediate = ((instr & ~3) << 16) >> 16;
if (absolute)
dest = immediate;
else
dest = pc + immediate;
break;
case 19:
ext_op = (instr >> 1) & 0x3ff;
if (ext_op == 16)
{
dest = read_register (gdbarch_tdep (current_gdbarch)->ppc_lr_regnum) & ~3;
if (dest < TEXT_SEGMENT_BASE)
{
struct frame_info *fi;
fi = get_current_frame ();
if (fi != NULL)
dest = read_memory_addr (fi->frame + SIG_FRAME_PC_OFFSET,
TDEP->wordsize);
}
}
else if (ext_op == 528)
{
dest = read_register (gdbarch_tdep (current_gdbarch)->ppc_ctr_regnum) & ~3;
if (dest < TEXT_SEGMENT_BASE)
dest = read_register (gdbarch_tdep (current_gdbarch)->ppc_lr_regnum) & ~3;
}
else
return -1;
break;
default:
return -1;
}
return (dest < TEXT_SEGMENT_BASE) ? safety : dest;
}
#define BIG_BREAKPOINT { 0x7d, 0x82, 0x10, 0x08 }
#define LITTLE_BREAKPOINT { 0x08, 0x10, 0x82, 0x7d }
static unsigned char *
rs6000_breakpoint_from_pc (CORE_ADDR *bp_addr, int *bp_size)
{
static unsigned char big_breakpoint[] = BIG_BREAKPOINT;
static unsigned char little_breakpoint[] = LITTLE_BREAKPOINT;
*bp_size = 4;
if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
return big_breakpoint;
else
return little_breakpoint;
}
void
rs6000_software_single_step (enum target_signal signal,
int insert_breakpoints_p)
{
#define INSNLEN(OPCODE) 4
static char le_breakp[] = LITTLE_BREAKPOINT;
static char be_breakp[] = BIG_BREAKPOINT;
char *breakp = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? be_breakp : le_breakp;
int ii, insn;
CORE_ADDR loc;
CORE_ADDR breaks[2];
int opcode;
if (insert_breakpoints_p)
{
loc = read_pc ();
insn = read_memory_integer (loc, 4);
breaks[0] = loc + INSNLEN (insn);
opcode = insn >> 26;
breaks[1] = branch_dest (opcode, insn, loc, breaks[0]);
if (breaks[1] == breaks[0])
breaks[1] = -1;
stepBreaks[1].address = 0;
for (ii = 0; ii < 2; ++ii)
{
if (breaks[ii] == -1)
continue;
read_memory (breaks[ii], stepBreaks[ii].data, 4);
write_memory (breaks[ii], breakp, 4);
stepBreaks[ii].address = breaks[ii];
}
}
else
{
for (ii = 0; ii < 2; ++ii)
if (stepBreaks[ii].address != 0)
write_memory
(stepBreaks[ii].address, stepBreaks[ii].data, 4);
}
errno = 0;
}
#define SIGNED_SHORT(x) \
((sizeof (short) == 2) \
? ((int)(short)(x)) \
: ((int)((((x) & 0xffff) ^ 0x8000) - 0x8000)))
#define GET_SRC_REG(x) (((x) >> 21) & 0x1f)
static int max_skip_non_prologue_insns = 10;
static CORE_ADDR
refine_prologue_limit (CORE_ADDR pc, CORE_ADDR lim_pc)
{
struct symtab_and_line prologue_sal;
prologue_sal = find_pc_line (pc, 0);
if (prologue_sal.line != 0)
{
int i;
CORE_ADDR addr = prologue_sal.end;
for (i = 2 * max_skip_non_prologue_insns;
i > 0 && (lim_pc == 0 || addr < lim_pc);
i--)
{
struct symtab_and_line sal;
sal = find_pc_line (addr, 0);
if (sal.line == 0)
break;
if (sal.line <= prologue_sal.line
&& sal.symtab == prologue_sal.symtab)
{
prologue_sal = sal;
}
addr = sal.end;
}
if (lim_pc == 0 || prologue_sal.end < lim_pc)
lim_pc = prologue_sal.end;
}
return lim_pc;
}
static CORE_ADDR
skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata)
{
CORE_ADDR orig_pc = pc;
CORE_ADDR last_prologue_pc = pc;
CORE_ADDR li_found_pc = 0;
char buf[4];
unsigned long op;
long offset = 0;
long vr_saved_offset = 0;
int lr_reg = -1;
int cr_reg = -1;
int vr_reg = -1;
int vrsave_reg = -1;
int reg;
int framep = 0;
int minimal_toc_loaded = 0;
int prev_insn_was_prologue_insn = 1;
int num_skip_non_prologue_insns = 0;
if (lim_pc == 0)
lim_pc = refine_prologue_limit (pc, lim_pc);
memset (fdata, 0, sizeof (struct rs6000_framedata));
fdata->saved_gpr = -1;
fdata->saved_fpr = -1;
fdata->saved_vr = -1;
fdata->alloca_reg = -1;
fdata->frameless = 1;
fdata->nosavedpc = 1;
for (;; pc += 4)
{
if (prev_insn_was_prologue_insn)
last_prologue_pc = pc;
if (lim_pc != 0 && pc >= lim_pc)
break;
prev_insn_was_prologue_insn = 1;
if (target_read_memory (pc, buf, 4))
break;
op = extract_signed_integer (buf, 4);
if ((op & 0xfc1fffff) == 0x7c0802a6)
{
lr_reg = (op & 0x03e00000) | 0x90010000;
continue;
}
else if ((op & 0xfc1fffff) == 0x7c000026)
{
cr_reg = (op & 0x03e00000) | 0x90010000;
continue;
}
else if ((op & 0xfc1f0000) == 0xd8010000)
{
reg = GET_SRC_REG (op);
if (fdata->saved_fpr == -1 || fdata->saved_fpr > reg)
{
fdata->saved_fpr = reg;
fdata->fpr_offset = SIGNED_SHORT (op) + offset;
}
continue;
}
else if (((op & 0xfc1f0000) == 0xbc010000) ||
(((op & 0xfc1f0000) == 0x90010000 ||
(op & 0xfc1f0003) == 0xf8010000) &&
(op & 0x03e00000) >= 0x01a00000))
{
reg = GET_SRC_REG (op);
if (fdata->saved_gpr == -1 || fdata->saved_gpr > reg)
{
fdata->saved_gpr = reg;
if ((op & 0xfc1f0003) == 0xf8010000)
op = (op >> 1) << 1;
fdata->gpr_offset = SIGNED_SHORT (op) + offset;
}
continue;
}
else if ((op & 0xffff0000) == 0x60000000)
{
prev_insn_was_prologue_insn = 0;
continue;
}
else if ((op & 0xffff0000) == 0x3c000000)
{
fdata->offset = (op & 0x0000ffff) << 16;
fdata->frameless = 0;
continue;
}
else if ((op & 0xffff0000) == 0x60000000)
{
fdata->offset |= (op & 0x0000ffff);
fdata->frameless = 0;
continue;
}
else if (lr_reg != -1 && (op & 0xffff0000) == lr_reg)
{
fdata->lr_offset = SIGNED_SHORT (op) + offset;
fdata->nosavedpc = 0;
lr_reg = 0;
continue;
}
else if (cr_reg != -1 && (op & 0xffff0000) == cr_reg)
{
fdata->cr_offset = SIGNED_SHORT (op) + offset;
cr_reg = 0;
continue;
}
else if (op == 0x48000005)
{
continue;
}
else if (op == 0x48000004)
{
break;
}
else if ((op & 0xffff0000) == 0x3fc00000 ||
(op & 0xffff0000) == 0x3bde0000)
{
continue;
}
else if ((op & 0xfc000001) == 0x48000001)
{
fdata->frameless = 0;
if ((pc - orig_pc) > 8)
break;
op = read_memory_integer (pc + 4, 4);
if (op == 0x4def7b82 || op == 0)
break;
continue;
}
else if ((op & 0xffff0000) == 0x94210000 ||
(op & 0xffff0003) == 0xf8210001)
{
fdata->frameless = 0;
if ((op & 0xffff0003) == 0xf8210001)
op = (op >> 1) << 1;
fdata->offset = SIGNED_SHORT (op);
offset = fdata->offset;
continue;
}
else if (op == 0x7c21016e)
{
fdata->frameless = 0;
offset = fdata->offset;
continue;
}
else if ((op >> 22) == 0x20f
&& !minimal_toc_loaded)
{
minimal_toc_loaded = 1;
continue;
}
else if ((op & 0xfc0007fe) == 0x7c000378 &&
(((op >> 21) & 31) >= 3) &&
(((op >> 21) & 31) <= 10) &&
(((op >> 16) & 31) >= fdata->saved_gpr))
{
continue;
}
else if ((op & 0xfc1f0003) == 0xf8010000 ||
(op & 0xfc1f0000) == 0xd8010000 ||
(op & 0xfc1f0000) == 0xfc010000)
{
continue;
}
else if (framep &&
((op & 0xfc1f0000) == 0x901f0000 ||
(op & 0xfc1f0000) == 0xd81f0000 ||
(op & 0xfc1f0000) == 0xfc1f0000))
{
continue;
}
else if (op == 0x603f0000
|| op == 0x7c3f0b78)
{
fdata->frameless = 0;
framep = 1;
fdata->alloca_reg = 31;
continue;
}
else if ((op & 0xfc1fffff) == 0x38010000)
{
fdata->frameless = 0;
framep = 1;
fdata->alloca_reg = (op & ~0x38010000) >> 21;
continue;
}
else if ((op & 0xfc1fffff) == 0x7c0042a6)
{
vrsave_reg = GET_SRC_REG (op);
continue;
}
else if ((op & 0xfc1fffff) == 0x7c0043a6)
{
continue;
}
else if ((op & 0xfc1f0000) == 0x90010000)
{
if (vrsave_reg == GET_SRC_REG (op))
{
fdata->vrsave_offset = SIGNED_SHORT (op) + offset;
vrsave_reg = -1;
}
continue;
}
else if (((op & 0xfc000000) == 0x64000000)
|| ((op & 0xfc000000) == 0x60000000))
{
continue;
}
else if ((op & 0xffff0000) == 0x38000000)
{
li_found_pc = pc;
vr_saved_offset = SIGNED_SHORT (op);
}
else if ((op & 0xfc1fffff) == 0x7c1f01ce)
{
if (pc == (li_found_pc + 4))
{
vr_reg = GET_SRC_REG (op);
if (fdata->saved_vr == -1 || fdata->saved_vr > vr_reg)
{
fdata->saved_vr = vr_reg;
fdata->vr_offset = vr_saved_offset + offset;
}
vr_saved_offset = -1;
vr_reg = -1;
li_found_pc = 0;
}
}
else
{
if (fdata->frameless == 0
&& (lr_reg == -1 || fdata->nosavedpc == 0))
break;
if (op == 0x4e800020
|| op == 0x4e800420)
break;
if ((op & 0xf4000000) == 0x40000000)
break;
if (num_skip_non_prologue_insns++ > max_skip_non_prologue_insns)
break;
prev_insn_was_prologue_insn = 0;
continue;
}
}
#if 0
if ((op & 0xfc000001) == 0x48000001)
{
op = read_memory_integer (pc + 4, 4);
if (op == 0x4def7b82)
{
tmp = find_pc_misc_function (pc);
if (tmp >= 0 && STREQ (misc_function_vector[tmp].name, main_name ()))
return pc + 8;
}
}
#endif
fdata->offset = -fdata->offset;
return last_prologue_pc;
}
static void
rs6000_pop_frame (void)
{
CORE_ADDR pc, lr, sp, prev_sp, addr;
struct rs6000_framedata fdata;
struct frame_info *frame = get_current_frame ();
int ii, wordsize;
pc = read_pc ();
sp = FRAME_FP (frame);
if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame))
{
generic_pop_dummy_frame ();
flush_cached_frames ();
return;
}
read_register_bytes (0, NULL, REGISTER_BYTES);
addr = get_pc_function_start (frame->pc);
(void) skip_prologue (addr, frame->pc, &fdata);
wordsize = TDEP->wordsize;
if (fdata.frameless)
prev_sp = sp;
else
prev_sp = read_memory_addr (sp, wordsize);
if (fdata.lr_offset == 0)
lr = read_register (gdbarch_tdep (current_gdbarch)->ppc_lr_regnum);
else
lr = read_memory_addr (prev_sp + fdata.lr_offset, wordsize);
write_register (PC_REGNUM, lr);
if (fdata.saved_gpr != -1)
{
addr = prev_sp + fdata.gpr_offset;
for (ii = fdata.saved_gpr; ii <= 31; ++ii)
{
read_memory (addr, ®isters[REGISTER_BYTE (ii)], wordsize);
addr += wordsize;
}
}
if (fdata.saved_fpr != -1)
{
addr = prev_sp + fdata.fpr_offset;
for (ii = fdata.saved_fpr; ii <= 31; ++ii)
{
read_memory (addr, ®isters[REGISTER_BYTE (ii + FP0_REGNUM)], 8);
addr += 8;
}
}
write_register (SP_REGNUM, prev_sp);
target_store_registers (-1);
flush_cached_frames ();
}
static void
rs6000_fix_call_dummy (char *dummyname, CORE_ADDR pc, CORE_ADDR fun,
int nargs, struct value **args, struct type *type,
int gcc_p)
{
#define TOC_ADDR_OFFSET 20
#define TARGET_ADDR_OFFSET 28
int ii;
CORE_ADDR target_addr;
if (rs6000_find_toc_address_hook != NULL)
{
CORE_ADDR tocvalue = (*rs6000_find_toc_address_hook) (fun);
write_register (gdbarch_tdep (current_gdbarch)->ppc_toc_regnum,
tocvalue);
}
}
static CORE_ADDR
rs6000_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
int struct_return, CORE_ADDR struct_addr)
{
int ii;
int len = 0;
int argno;
int argbytes;
char tmp_buffer[50];
int f_argno = 0;
int wordsize = TDEP->wordsize;
struct value *arg = 0;
struct type *type;
CORE_ADDR saved_sp;
ii = struct_return ? 1 : 0;
for (argno = 0, argbytes = 0; argno < nargs && ii < 8; ++ii)
{
int reg_size = REGISTER_RAW_SIZE (ii + 3);
arg = args[argno];
type = check_typedef (VALUE_TYPE (arg));
len = TYPE_LENGTH (type);
if (TYPE_CODE (type) == TYPE_CODE_FLT)
{
if (len > 8)
printf_unfiltered (
"Fatal Error: a floating point parameter #%d with a size > 8 is found!\n", argno);
memcpy (®isters[REGISTER_BYTE (FP0_REGNUM + 1 + f_argno)],
VALUE_CONTENTS (arg),
len);
++f_argno;
}
if (len > reg_size)
{
while (argbytes < len)
{
memset (®isters[REGISTER_BYTE (ii + 3)], 0, reg_size);
memcpy (®isters[REGISTER_BYTE (ii + 3)],
((char *) VALUE_CONTENTS (arg)) + argbytes,
(len - argbytes) > reg_size
? reg_size : len - argbytes);
++ii, argbytes += reg_size;
if (ii >= 8)
goto ran_out_of_registers_for_arguments;
}
argbytes = 0;
--ii;
}
else
{
int adj = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? reg_size - len : 0;
memset (®isters[REGISTER_BYTE (ii + 3)], 0, reg_size);
memcpy ((char *)®isters[REGISTER_BYTE (ii + 3)] + adj,
VALUE_CONTENTS (arg), len);
}
++argno;
}
ran_out_of_registers_for_arguments:
saved_sp = read_sp ();
#ifndef ELF_OBJECT_FORMAT
sp -= wordsize * 8;
sp -= wordsize * 6;
sp &= -16;
#endif
if ((argno < nargs) || argbytes)
{
int space = 0, jj;
if (argbytes)
{
space += ((len - argbytes + 3) & -4);
jj = argno + 1;
}
else
jj = argno;
for (; jj < nargs; ++jj)
{
struct value *val = args[jj];
space += ((TYPE_LENGTH (VALUE_TYPE (val))) + 3) & -4;
}
space = (space + 15) & -16;
sp -= space;
write_register (SP_REGNUM, sp);
if (argbytes)
{
write_memory (sp + 24 + (ii * 4),
((char *) VALUE_CONTENTS (arg)) + argbytes,
len - argbytes);
++argno;
ii += ((len - argbytes + 3) & -4) / 4;
}
for (; argno < nargs; ++argno)
{
arg = args[argno];
type = check_typedef (VALUE_TYPE (arg));
len = TYPE_LENGTH (type);
if (TYPE_CODE (type) == TYPE_CODE_FLT && f_argno < 13)
{
if (len > 8)
printf_unfiltered (
"Fatal Error: a floating point parameter #%d with a size > 8 is found!\n", argno);
memcpy (®isters[REGISTER_BYTE (FP0_REGNUM + 1 + f_argno)],
VALUE_CONTENTS (arg),
len);
++f_argno;
}
write_memory (sp + 24 + (ii * 4), (char *) VALUE_CONTENTS (arg), len);
ii += ((len + 3) & -4) / 4;
}
}
else
write_register (SP_REGNUM, sp);
store_address (tmp_buffer, 4, saved_sp);
write_memory (sp, tmp_buffer, 4);
target_store_registers (-1);
return sp;
}
static CORE_ADDR
ppc_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
{
write_register (gdbarch_tdep (current_gdbarch)->ppc_lr_regnum,
CALL_DUMMY_ADDRESS ());
return sp;
}
static void
rs6000_extract_return_value (struct type *valtype, char *regbuf, char *valbuf)
{
int offset = 0;
if (TYPE_CODE (valtype) == TYPE_CODE_FLT)
{
double dd;
float ff;
if (TYPE_LENGTH (valtype) > 4)
memcpy (valbuf,
®buf[REGISTER_BYTE (FP0_REGNUM + 1)],
TYPE_LENGTH (valtype));
else
{
memcpy (&dd, ®buf[REGISTER_BYTE (FP0_REGNUM + 1)], 8);
ff = (float) dd;
memcpy (valbuf, &ff, sizeof (float));
}
}
else
{
if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG
&& TYPE_LENGTH (valtype) < REGISTER_RAW_SIZE (3))
offset = REGISTER_RAW_SIZE (3) - TYPE_LENGTH (valtype);
memcpy (valbuf,
regbuf + REGISTER_BYTE (3) + offset,
TYPE_LENGTH (valtype));
}
}
static CORE_ADDR rs6000_struct_return_address;
int
rs6000_in_solib_return_trampoline (CORE_ADDR pc, char *name)
{
return name && !strncmp (name, "@FIX", 4);
}
CORE_ADDR
rs6000_skip_trampoline_code (CORE_ADDR pc)
{
register unsigned int ii, op;
int rel;
CORE_ADDR solib_target_pc;
struct minimal_symbol *msymbol;
static unsigned trampoline_code[] =
{
0x800b0000,
0x90410014,
0x7c0903a6,
0x804b0004,
0x816b0008,
0x4e800420,
0x4e800020,
0
};
msymbol = lookup_minimal_symbol_by_pc (pc);
if (msymbol && rs6000_in_solib_return_trampoline (pc, SYMBOL_NAME (msymbol)))
{
op = read_memory_integer (pc + 8, 4);
if ((op & 0xfc000003) == 0x48000000)
{
rel = ((int)(op << 6) >> 6);
return pc + 8 + rel;
}
}
solib_target_pc = find_solib_trampoline_target (pc);
if (solib_target_pc)
return solib_target_pc;
for (ii = 0; trampoline_code[ii]; ++ii)
{
op = read_memory_integer (pc + (ii * 4), 4);
if (op != trampoline_code[ii])
return 0;
}
ii = read_register (11);
pc = read_memory_addr (ii, TDEP->wordsize);
return pc;
}
int
rs6000_frameless_function_invocation (struct frame_info *fi)
{
CORE_ADDR func_start;
struct rs6000_framedata fdata;
if (fi->next != NULL && !fi->next->signal_handler_caller)
return 0;
func_start = get_pc_function_start (fi->pc);
if (!func_start)
{
if (fi->pc == 0)
return 1;
else
return 0;
}
(void) skip_prologue (func_start, fi->pc, &fdata);
return fdata.frameless;
}
CORE_ADDR
rs6000_frame_saved_pc (struct frame_info *fi)
{
CORE_ADDR func_start;
struct rs6000_framedata fdata;
int wordsize = TDEP->wordsize;
if (fi->signal_handler_caller)
return read_memory_addr (fi->frame + SIG_FRAME_PC_OFFSET, wordsize);
if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame))
return generic_read_register_dummy (fi->pc, fi->frame, PC_REGNUM);
func_start = get_pc_function_start (fi->pc);
if (!func_start)
return 0;
(void) skip_prologue (func_start, fi->pc, &fdata);
if (fdata.lr_offset == 0 && fi->next != NULL)
{
if (fi->next->signal_handler_caller)
return read_memory_addr (fi->next->frame + SIG_FRAME_LR_OFFSET,
wordsize);
else
return read_memory_addr (FRAME_CHAIN (fi) + DEFAULT_LR_SAVE,
wordsize);
}
if (fdata.lr_offset == 0)
return read_register (gdbarch_tdep (current_gdbarch)->ppc_lr_regnum);
return read_memory_addr (FRAME_CHAIN (fi) + fdata.lr_offset, wordsize);
}
static void
frame_get_saved_regs (struct frame_info *fi, struct rs6000_framedata *fdatap)
{
CORE_ADDR frame_addr;
struct rs6000_framedata work_fdata;
struct gdbarch_tdep * tdep = gdbarch_tdep (current_gdbarch);
int wordsize = tdep->wordsize;
if (fi->saved_regs)
return;
if (fdatap == NULL)
{
fdatap = &work_fdata;
(void) skip_prologue (get_pc_function_start (fi->pc), fi->pc, fdatap);
}
frame_saved_regs_zalloc (fi);
if (fdatap->saved_fpr == 0
&& fdatap->saved_gpr == 0
&& fdatap->saved_vr == 0
&& fdatap->lr_offset == 0
&& fdatap->cr_offset == 0
&& fdatap->vr_offset == 0)
frame_addr = 0;
else if (fi->prev && fi->prev->frame)
frame_addr = fi->prev->frame;
else
frame_addr = read_memory_addr (fi->frame, wordsize);
if (fdatap->saved_fpr >= 0)
{
int i;
CORE_ADDR fpr_addr = frame_addr + fdatap->fpr_offset;
for (i = fdatap->saved_fpr; i < 32; i++)
{
fi->saved_regs[FP0_REGNUM + i] = fpr_addr;
fpr_addr += 8;
}
}
if (fdatap->saved_gpr >= 0)
{
int i;
CORE_ADDR gpr_addr = frame_addr + fdatap->gpr_offset;
for (i = fdatap->saved_gpr; i < 32; i++)
{
fi->saved_regs[i] = gpr_addr;
gpr_addr += wordsize;
}
}
if (tdep->ppc_vr0_regnum != -1 && tdep->ppc_vrsave_regnum != -1)
{
if (fdatap->saved_vr >= 0)
{
int i;
CORE_ADDR vr_addr = frame_addr + fdatap->vr_offset;
for (i = fdatap->saved_vr; i < 32; i++)
{
fi->saved_regs[tdep->ppc_vr0_regnum + i] = vr_addr;
vr_addr += REGISTER_RAW_SIZE (tdep->ppc_vr0_regnum);
}
}
}
if (fdatap->cr_offset != 0)
fi->saved_regs[tdep->ppc_cr_regnum] = frame_addr + fdatap->cr_offset;
if (fdatap->lr_offset != 0)
fi->saved_regs[tdep->ppc_lr_regnum] = frame_addr + fdatap->lr_offset;
if (fdatap->vrsave_offset != 0)
fi->saved_regs[tdep->ppc_vrsave_regnum] = frame_addr + fdatap->vrsave_offset;
}
static CORE_ADDR
frame_initial_stack_address (struct frame_info *fi)
{
CORE_ADDR tmpaddr;
struct rs6000_framedata fdata;
struct frame_info *callee_fi;
if (fi->extra_info->initial_sp)
return fi->extra_info->initial_sp;
(void) skip_prologue (get_pc_function_start (fi->pc), fi->pc, &fdata);
if (!fi->saved_regs)
frame_get_saved_regs (fi, &fdata);
if (fdata.alloca_reg < 0)
{
fi->extra_info->initial_sp = fi->frame;
return fi->extra_info->initial_sp;
}
if (!fi->next)
return fi->extra_info->initial_sp = read_register (fdata.alloca_reg);
for (callee_fi = fi->next; callee_fi; callee_fi = callee_fi->next)
{
if (!callee_fi->saved_regs)
frame_get_saved_regs (callee_fi, NULL);
tmpaddr = callee_fi->saved_regs[fdata.alloca_reg];
if (tmpaddr)
{
fi->extra_info->initial_sp =
read_memory_addr (tmpaddr, TDEP->wordsize);
return fi->extra_info->initial_sp;
}
}
fi->extra_info->initial_sp = read_register (fdata.alloca_reg);
return fi->extra_info->initial_sp;
}
CORE_ADDR
rs6000_frame_chain (struct frame_info *thisframe)
{
CORE_ADDR fp, fpp, lr;
int wordsize = TDEP->wordsize;
if (PC_IN_CALL_DUMMY (thisframe->pc, thisframe->frame, thisframe->frame))
return thisframe->frame;
if (inside_entry_file (thisframe->pc) ||
thisframe->pc == entry_point_address ())
return 0;
if (thisframe->signal_handler_caller)
fp = read_memory_addr (thisframe->frame + SIG_FRAME_FP_OFFSET,
wordsize);
else if (thisframe->next != NULL
&& thisframe->next->signal_handler_caller
&& FRAMELESS_FUNCTION_INVOCATION (thisframe))
fp = FRAME_FP (thisframe);
else
fp = read_memory_addr ((thisframe)->frame, wordsize);
lr = read_register (gdbarch_tdep (current_gdbarch)->ppc_lr_regnum);
if (lr == entry_point_address ())
if (fp != 0 && (fpp = read_memory_addr (fp, wordsize)) != 0)
if (PC_IN_CALL_DUMMY (lr, fpp, fpp))
return fpp;
return fp;
}
static int
regsize (const struct reg *reg, int wordsize)
{
return wordsize == 8 ? reg->sz64 : reg->sz32;
}
static char *
rs6000_register_name (int n)
{
struct gdbarch_tdep *tdep = TDEP;
const struct reg *reg = tdep->regs + n;
if (!regsize (reg, tdep->wordsize))
return NULL;
return reg->name;
}
static int
rs6000_register_byte (int n)
{
return TDEP->regoff[n];
}
static int
rs6000_register_raw_size (int n)
{
struct gdbarch_tdep *tdep = TDEP;
const struct reg *reg = tdep->regs + n;
return regsize (reg, tdep->wordsize);
}
static struct type *
rs6000_register_virtual_type (int n)
{
struct gdbarch_tdep *tdep = TDEP;
const struct reg *reg = tdep->regs + n;
if (reg->fpr)
return builtin_type_double;
else
{
int size = regsize (reg, tdep->wordsize);
switch (size)
{
case 8:
return builtin_type_int64;
break;
case 16:
return builtin_type_vec128;
break;
default:
return builtin_type_int32;
break;
}
}
}
static int
rs6000_coerce_float_to_double (struct type *formal, struct type *actual)
{
return 1;
}
static int
rs6000_register_convertible (int n)
{
const struct reg *reg = TDEP->regs + n;
return reg->fpr;
}
static void
rs6000_register_convert_to_virtual (int n, struct type *type,
char *from, char *to)
{
if (TYPE_LENGTH (type) != REGISTER_RAW_SIZE (n))
{
double val = extract_floating (from, REGISTER_RAW_SIZE (n));
store_floating (to, TYPE_LENGTH (type), val);
}
else
memcpy (to, from, REGISTER_RAW_SIZE (n));
}
static void
rs6000_register_convert_to_raw (struct type *type, int n,
char *from, char *to)
{
if (TYPE_LENGTH (type) != REGISTER_RAW_SIZE (n))
{
double val = extract_floating (from, TYPE_LENGTH (type));
store_floating (to, REGISTER_RAW_SIZE (n), val);
}
else
memcpy (to, from, REGISTER_RAW_SIZE (n));
}
int
altivec_register_p (int regno)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
if (tdep->ppc_vr0_regnum < 0 || tdep->ppc_vrsave_regnum < 0)
return 0;
else
return (regno >= tdep->ppc_vr0_regnum && regno <= tdep->ppc_vrsave_regnum);
}
static void
rs6000_do_altivec_registers (int regnum)
{
int i;
char *raw_buffer = (char*) alloca (MAX_REGISTER_RAW_SIZE);
char *virtual_buffer = (char*) alloca (MAX_REGISTER_VIRTUAL_SIZE);
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
for (i = tdep->ppc_vr0_regnum; i <= tdep->ppc_vrsave_regnum; i++)
{
if (regnum != -1 && i != regnum)
continue;
if (REGISTER_NAME (i) == NULL || *(REGISTER_NAME (i)) == '\0')
continue;
fputs_filtered (REGISTER_NAME (i), gdb_stdout);
print_spaces_filtered (15 - strlen (REGISTER_NAME (i)), gdb_stdout);
if (read_relative_register_raw_bytes (i, raw_buffer))
{
printf_filtered ("*value not available*\n");
continue;
}
if (REGISTER_CONVERTIBLE (i))
REGISTER_CONVERT_TO_VIRTUAL (i, REGISTER_VIRTUAL_TYPE (i),
raw_buffer, virtual_buffer);
else
memcpy (virtual_buffer, raw_buffer, REGISTER_VIRTUAL_SIZE (i));
val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0,
gdb_stdout, 'x', 1, 0, Val_pretty_default);
printf_filtered ("\n");
}
}
static void
rs6000_altivec_registers_info (char *addr_exp, int from_tty)
{
int regnum, numregs;
register char *end;
if (!target_has_registers)
error ("The program has no registers now.");
if (selected_frame == NULL)
error ("No selected frame.");
if (!addr_exp)
{
rs6000_do_altivec_registers (-1);
return;
}
numregs = NUM_REGS + NUM_PSEUDO_REGS;
do
{
if (addr_exp[0] == '$')
addr_exp++;
end = addr_exp;
while (*end != '\0' && *end != ' ' && *end != '\t')
++end;
regnum = target_map_name_to_register (addr_exp, end - addr_exp);
if (regnum < 0)
{
regnum = numregs;
if (*addr_exp >= '0' && *addr_exp <= '9')
regnum = atoi (addr_exp);
if (regnum >= numregs)
error ("%.*s: invalid register", end - addr_exp, addr_exp);
}
rs6000_do_altivec_registers (regnum);
addr_exp = end;
while (*addr_exp == ' ' || *addr_exp == '\t')
++addr_exp;
}
while (*addr_exp != '\0');
}
static void
rs6000_do_registers_info (int regnum, int fpregs)
{
register int i;
int numregs = NUM_REGS + NUM_PSEUDO_REGS;
char *raw_buffer = (char*) alloca (MAX_REGISTER_RAW_SIZE);
char *virtual_buffer = (char*) alloca (MAX_REGISTER_VIRTUAL_SIZE);
for (i = 0; i < numregs; i++)
{
if (regnum == -1)
{
if ((TYPE_CODE (REGISTER_VIRTUAL_TYPE (i)) == TYPE_CODE_FLT && !fpregs)
|| (altivec_register_p (i) && !fpregs))
continue;
}
else
{
if (i != regnum)
continue;
}
if (REGISTER_NAME (i) == NULL || *(REGISTER_NAME (i)) == '\0')
continue;
fputs_filtered (REGISTER_NAME (i), gdb_stdout);
print_spaces_filtered (15 - strlen (REGISTER_NAME (i)), gdb_stdout);
if (read_relative_register_raw_bytes (i, raw_buffer))
{
printf_filtered ("*value not available*\n");
continue;
}
if (REGISTER_CONVERTIBLE (i))
REGISTER_CONVERT_TO_VIRTUAL (i, REGISTER_VIRTUAL_TYPE (i),
raw_buffer, virtual_buffer);
else
memcpy (virtual_buffer, raw_buffer, REGISTER_VIRTUAL_SIZE (i));
if (TYPE_CODE (REGISTER_VIRTUAL_TYPE (i)) == TYPE_CODE_FLT)
{
register int j;
val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0,
gdb_stdout, 0, 1, 0, Val_pretty_default);
printf_filtered ("\t(raw 0x");
for (j = 0; j < REGISTER_RAW_SIZE (i); j++)
{
register int idx = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? j
: REGISTER_RAW_SIZE (i) - 1 - j;
printf_filtered ("%02x", (unsigned char) raw_buffer[idx]);
}
printf_filtered (")");
}
else
{
if (!altivec_register_p (i))
{
val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0,
gdb_stdout, 'x', 1, 0, Val_pretty_default);
printf_filtered ("\t");
val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0,
gdb_stdout, 0, 1, 0, Val_pretty_default);
}
else
val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0,
gdb_stdout, 'x', 1, 0, Val_pretty_default);
}
printf_filtered ("\n");
}
}
static int
rs6000_stab_reg_to_regnum (int num)
{
int regnum;
switch (num)
{
case 64:
regnum = gdbarch_tdep (current_gdbarch)->ppc_mq_regnum;
break;
case 65:
regnum = gdbarch_tdep (current_gdbarch)->ppc_lr_regnum;
break;
case 66:
regnum = gdbarch_tdep (current_gdbarch)->ppc_ctr_regnum;
break;
case 76:
regnum = gdbarch_tdep (current_gdbarch)->ppc_xer_regnum;
break;
default:
regnum = num;
break;
}
return regnum;
}
static void
rs6000_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
{
write_register (3, addr);
rs6000_struct_return_address = addr;
}
static void
rs6000_store_return_value (struct type *type, char *valbuf)
{
if (TYPE_CODE (type) == TYPE_CODE_FLT)
write_register_bytes (REGISTER_BYTE (FP0_REGNUM + 1), valbuf,
TYPE_LENGTH (type));
else
write_register_bytes (REGISTER_BYTE (gdbarch_tdep (current_gdbarch)->ppc_gp0_regnum + 3),
valbuf, TYPE_LENGTH (type));
}
static CORE_ADDR
rs6000_extract_struct_value_address (char *regbuf)
{
return rs6000_struct_return_address;
}
static int
rs6000_pc_in_call_dummy (CORE_ADDR pc, CORE_ADDR sp, CORE_ADDR fp)
{
return sp < pc && pc < fp;
}
void
rs6000_create_inferior (int pid)
{
if (rs6000_set_host_arch_hook)
rs6000_set_host_arch_hook (pid);
}
CORE_ADDR
rs6000_convert_from_func_ptr_addr (CORE_ADDR addr)
{
struct obj_section *s;
s = find_pc_section (addr);
if (s && s->the_bfd_section->flags & SEC_CODE)
return addr;
return read_memory_addr (addr, TDEP->wordsize);
}
#define STR(s) #s
#define R(name) { STR(name), 4, 8, 0 }
#define R4(name) { STR(name), 4, 4, 0 }
#define R8(name) { STR(name), 8, 8, 0 }
#define R16(name) { STR(name), 16, 16, 0 }
#define F(name) { STR(name), 8, 8, 1 }
#define R32(name) { STR(name), 4, 0, 0 }
#define R64(name) { STR(name), 0, 8, 0 }
#define R0 { 0, 0, 0, 0 }
#define COMMON_UISA_REGS \
R(r0), R(r1), R(r2), R(r3), R(r4), R(r5), R(r6), R(r7), \
R(r8), R(r9), R(r10),R(r11),R(r12),R(r13),R(r14),R(r15), \
R(r16),R(r17),R(r18),R(r19),R(r20),R(r21),R(r22),R(r23), \
R(r24),R(r25),R(r26),R(r27),R(r28),R(r29),R(r30),R(r31), \
F(f0), F(f1), F(f2), F(f3), F(f4), F(f5), F(f6), F(f7), \
F(f8), F(f9), F(f10),F(f11),F(f12),F(f13),F(f14),F(f15), \
F(f16),F(f17),F(f18),F(f19),F(f20),F(f21),F(f22),F(f23), \
F(f24),F(f25),F(f26),F(f27),F(f28),F(f29),F(f30),F(f31), \
R(pc), R(ps)
#define PPC_UISA_SPRS \
R4(cr), R(lr), R(ctr), R4(xer), R0
#define PPC_SEGMENT_REGS \
R32(sr0), R32(sr1), R32(sr2), R32(sr3), \
R32(sr4), R32(sr5), R32(sr6), R32(sr7), \
R32(sr8), R32(sr9), R32(sr10), R32(sr11), \
R32(sr12), R32(sr13), R32(sr14), R32(sr15)
#define PPC_OEA_SPRS \
R4(pvr), \
R(ibat0u), R(ibat0l), R(ibat1u), R(ibat1l), \
R(ibat2u), R(ibat2l), R(ibat3u), R(ibat3l), \
R(dbat0u), R(dbat0l), R(dbat1u), R(dbat1l), \
R(dbat2u), R(dbat2l), R(dbat3u), R(dbat3l), \
R(sdr1), R64(asr), R(dar), R4(dsisr), \
R(sprg0), R(sprg1), R(sprg2), R(sprg3), \
R(srr0), R(srr1), R(tbl), R(tbu), \
R4(dec), R(dabr), R4(ear)
#define PPC_ALTIVEC_REGS \
R16(vr0), R16(vr1), R16(vr2), R16(vr3), R16(vr4), R16(vr5), R16(vr6), R16(vr7), \
R16(vr8), R16(vr9), R16(vr10),R16(vr11),R16(vr12),R16(vr13),R16(vr14),R16(vr15), \
R16(vr16),R16(vr17),R16(vr18),R16(vr19),R16(vr20),R16(vr21),R16(vr22),R16(vr23), \
R16(vr24),R16(vr25),R16(vr26),R16(vr27),R16(vr28),R16(vr29),R16(vr30),R16(vr31), \
R4(vscr), R4(vrsave)
static const struct reg registers_power[] =
{
COMMON_UISA_REGS,
R4(cnd), R(lr), R(cnt), R4(xer), R4(mq)
};
static const struct reg registers_powerpc[] =
{
COMMON_UISA_REGS,
PPC_UISA_SPRS,
PPC_ALTIVEC_REGS
};
static const struct reg registers_403[] =
{
COMMON_UISA_REGS,
PPC_UISA_SPRS,
PPC_SEGMENT_REGS,
PPC_OEA_SPRS,
R(icdbdr), R(esr), R(dear), R(evpr),
R(cdbcr), R(tsr), R(tcr), R(pit),
R(tbhi), R(tblo), R(srr2), R(srr3),
R(dbsr), R(dbcr), R(iac1), R(iac2),
R(dac1), R(dac2), R(dccr), R(iccr),
R(pbl1), R(pbu1), R(pbl2), R(pbu2)
};
static const struct reg registers_403GC[] =
{
COMMON_UISA_REGS,
PPC_UISA_SPRS,
PPC_SEGMENT_REGS,
PPC_OEA_SPRS,
R(icdbdr), R(esr), R(dear), R(evpr),
R(cdbcr), R(tsr), R(tcr), R(pit),
R(tbhi), R(tblo), R(srr2), R(srr3),
R(dbsr), R(dbcr), R(iac1), R(iac2),
R(dac1), R(dac2), R(dccr), R(iccr),
R(pbl1), R(pbu1), R(pbl2), R(pbu2),
R(zpr), R(pid), R(sgr), R(dcwr),
R(tbhu), R(tblu)
};
static const struct reg registers_505[] =
{
COMMON_UISA_REGS,
PPC_UISA_SPRS,
PPC_SEGMENT_REGS,
PPC_OEA_SPRS,
R(eie), R(eid), R(nri)
};
static const struct reg registers_860[] =
{
COMMON_UISA_REGS,
PPC_UISA_SPRS,
PPC_SEGMENT_REGS,
PPC_OEA_SPRS,
R(eie), R(eid), R(nri), R(cmpa),
R(cmpb), R(cmpc), R(cmpd), R(icr),
R(der), R(counta), R(countb), R(cmpe),
R(cmpf), R(cmpg), R(cmph), R(lctrl1),
R(lctrl2), R(ictrl), R(bar), R(ic_cst),
R(ic_adr), R(ic_dat), R(dc_cst), R(dc_adr),
R(dc_dat), R(dpdr), R(dpir), R(immr),
R(mi_ctr), R(mi_ap), R(mi_epn), R(mi_twc),
R(mi_rpn), R(md_ctr), R(m_casid), R(md_ap),
R(md_epn), R(md_twb), R(md_twc), R(md_rpn),
R(m_tw), R(mi_dbcam), R(mi_dbram0), R(mi_dbram1),
R(md_dbcam), R(md_dbram0), R(md_dbram1)
};
static const struct reg registers_601[] =
{
COMMON_UISA_REGS,
PPC_UISA_SPRS,
PPC_SEGMENT_REGS,
PPC_OEA_SPRS,
R(hid0), R(hid1), R(iabr), R(dabr),
R(pir), R(mq), R(rtcu), R(rtcl)
};
static const struct reg registers_602[] =
{
COMMON_UISA_REGS,
PPC_UISA_SPRS,
PPC_SEGMENT_REGS,
PPC_OEA_SPRS,
R(hid0), R(hid1), R(iabr), R0,
R0, R(tcr), R(ibr), R(esassr),
R(sebr), R(ser), R(sp), R(lt)
};
static const struct reg registers_603[] =
{
COMMON_UISA_REGS,
PPC_UISA_SPRS,
PPC_SEGMENT_REGS,
PPC_OEA_SPRS,
R(hid0), R(hid1), R(iabr), R0,
R0, R(dmiss), R(dcmp), R(hash1),
R(hash2), R(imiss), R(icmp), R(rpa)
};
static const struct reg registers_604[] =
{
COMMON_UISA_REGS,
PPC_UISA_SPRS,
PPC_SEGMENT_REGS,
PPC_OEA_SPRS,
R(hid0), R(hid1), R(iabr), R(dabr),
R(pir), R(mmcr0), R(pmc1), R(pmc2),
R(sia), R(sda)
};
static const struct reg registers_750[] =
{
COMMON_UISA_REGS,
PPC_UISA_SPRS,
PPC_SEGMENT_REGS,
PPC_OEA_SPRS,
R(hid0), R(hid1), R(iabr), R(dabr),
R0, R(ummcr0), R(upmc1), R(upmc2),
R(usia), R(ummcr1), R(upmc3), R(upmc4),
R(mmcr0), R(pmc1), R(pmc2), R(sia),
R(mmcr1), R(pmc3), R(pmc4), R(l2cr),
R(ictc), R(thrm1), R(thrm2), R(thrm3)
};
static const struct reg registers_7400[] =
{
COMMON_UISA_REGS,
PPC_UISA_SPRS,
PPC_SEGMENT_REGS,
PPC_OEA_SPRS,
PPC_ALTIVEC_REGS
};
struct variant
{
char *name;
char *description;
enum bfd_architecture arch;
unsigned long mach;
int nregs;
const struct reg *regs;
};
#define num_registers(list) (sizeof (list) / sizeof((list)[0]))
static const struct variant variants[] =
{
{"powerpc", "PowerPC user-level", bfd_arch_powerpc,
bfd_mach_ppc, num_registers (registers_powerpc), registers_powerpc},
{"power", "POWER user-level", bfd_arch_rs6000,
bfd_mach_rs6k, num_registers (registers_power), registers_power},
{"403", "IBM PowerPC 403", bfd_arch_powerpc,
bfd_mach_ppc_403, num_registers (registers_403), registers_403},
{"601", "Motorola PowerPC 601", bfd_arch_powerpc,
bfd_mach_ppc_601, num_registers (registers_601), registers_601},
{"602", "Motorola PowerPC 602", bfd_arch_powerpc,
bfd_mach_ppc_602, num_registers (registers_602), registers_602},
{"603", "Motorola/IBM PowerPC 603 or 603e", bfd_arch_powerpc,
bfd_mach_ppc_603, num_registers (registers_603), registers_603},
{"604", "Motorola PowerPC 604 or 604e", bfd_arch_powerpc,
604, num_registers (registers_604), registers_604},
{"403GC", "IBM PowerPC 403GC", bfd_arch_powerpc,
bfd_mach_ppc_403gc, num_registers (registers_403GC), registers_403GC},
{"505", "Motorola PowerPC 505", bfd_arch_powerpc,
bfd_mach_ppc_505, num_registers (registers_505), registers_505},
{"860", "Motorola PowerPC 860 or 850", bfd_arch_powerpc,
bfd_mach_ppc_860, num_registers (registers_860), registers_860},
{"750", "Motorola/IBM PowerPC 750 or 740", bfd_arch_powerpc,
bfd_mach_ppc_750, num_registers (registers_750), registers_750},
{"7400", "Motorola/IBM PowerPC 7400 (G4)", bfd_arch_powerpc,
bfd_mach_ppc_7400, num_registers (registers_7400), registers_7400},
{"620", "Motorola PowerPC 620", bfd_arch_powerpc,
bfd_mach_ppc_620, num_registers (registers_powerpc), registers_powerpc},
{"a35", "PowerPC A35", bfd_arch_powerpc,
bfd_mach_ppc_a35, num_registers (registers_powerpc), registers_powerpc},
{"rs1", "IBM POWER RS1", bfd_arch_rs6000,
bfd_mach_rs6k_rs1, num_registers (registers_power), registers_power},
{"rsc", "IBM POWER RSC", bfd_arch_rs6000,
bfd_mach_rs6k_rsc, num_registers (registers_power), registers_power},
{"rs2", "IBM POWER RS2", bfd_arch_rs6000,
bfd_mach_rs6k_rs2, num_registers (registers_power), registers_power},
{0, 0, 0, 0}
};
#undef num_registers
static const struct variant *
find_variant_by_arch (enum bfd_architecture arch, unsigned long mach)
{
const struct variant *v;
for (v = variants; v->name; v++)
if (arch == v->arch && mach == v->mach)
return v;
return NULL;
}
static void
process_note_abi_tag_sections (bfd *abfd, asection *sect, void *obj)
{
int *os_ident_ptr = obj;
const char *name;
unsigned int sectsize;
name = bfd_get_section_name (abfd, sect);
sectsize = bfd_section_size (abfd, sect);
if (strcmp (name, ".note.ABI-tag") == 0 && sectsize > 0)
{
unsigned int name_length, data_length, note_type;
char *note = alloca (sectsize);
bfd_get_section_contents (abfd, sect, note,
(file_ptr) 0, (bfd_size_type) sectsize);
name_length = bfd_h_get_32 (abfd, note);
data_length = bfd_h_get_32 (abfd, note + 4);
note_type = bfd_h_get_32 (abfd, note + 8);
if (name_length == 4 && data_length == 16 && note_type == 1
&& strcmp (note + 12, "GNU") == 0)
{
int os_number = bfd_h_get_32 (abfd, note + 16);
switch (os_number)
{
case 0 :
*os_ident_ptr = ELFOSABI_LINUX;
break;
case 1 :
*os_ident_ptr = ELFOSABI_HURD;
break;
case 2 :
*os_ident_ptr = ELFOSABI_SOLARIS;
break;
default :
internal_error (__FILE__, __LINE__,
"process_note_abi_sections: unknown OS number %d",
os_number);
break;
}
}
}
}
static int
get_elfosabi (bfd *abfd)
{
int elfosabi = -1;
if (abfd != NULL && bfd_get_flavour (abfd) == bfd_target_elf_flavour)
{
elfosabi = elf_elfheader (abfd)->e_ident[EI_OSABI];
if (elfosabi == 0)
{
bfd_map_over_sections (abfd,
process_note_abi_tag_sections,
&elfosabi);
}
}
return elfosabi;
}
static struct gdbarch *
rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
{
struct gdbarch *gdbarch;
struct gdbarch_tdep *tdep;
int wordsize, from_xcoff_exec, from_elf_exec, power, i, off;
struct reg *regs;
const struct variant *v;
enum bfd_architecture arch;
unsigned long mach;
bfd abfd;
int osabi, sysv_abi;
from_xcoff_exec = info.abfd && info.abfd->format == bfd_object &&
bfd_get_flavour (info.abfd) == bfd_target_xcoff_flavour;
from_elf_exec = info.abfd && info.abfd->format == bfd_object &&
bfd_get_flavour (info.abfd) == bfd_target_elf_flavour;
sysv_abi = info.abfd && bfd_get_flavour (info.abfd) == bfd_target_elf_flavour;
osabi = get_elfosabi (info.abfd);
if (from_xcoff_exec)
{
if (xcoff_data (info.abfd)->xcoff64)
wordsize = 8;
else
wordsize = 4;
}
else if (from_elf_exec)
{
if (elf_elfheader (info.abfd)->e_ident[EI_CLASS] == ELFCLASS64)
wordsize = 8;
else
wordsize = 4;
}
else
{
wordsize = 4;
}
for (arches = gdbarch_list_lookup_by_info (arches, &info);
arches != NULL;
arches = gdbarch_list_lookup_by_info (arches->next, &info))
{
tdep = gdbarch_tdep (arches->gdbarch);
if (tdep && tdep->wordsize == wordsize && tdep->osabi == osabi)
return arches->gdbarch;
}
if (!from_xcoff_exec)
{
arch = info.bfd_arch_info->arch;
mach = info.bfd_arch_info->mach;
}
else
{
arch = bfd_arch_powerpc;
mach = 0;
bfd_default_set_arch_mach (&abfd, arch, mach);
info.bfd_arch_info = bfd_get_arch_info (&abfd);
}
tdep = xmalloc (sizeof (struct gdbarch_tdep));
tdep->wordsize = wordsize;
tdep->osabi = osabi;
gdbarch = gdbarch_alloc (&info, tdep);
power = arch == bfd_arch_rs6000;
tm_print_insn = arch == power ? print_insn_rs6000 :
info.byte_order == BFD_ENDIAN_BIG ? print_insn_big_powerpc :
print_insn_little_powerpc;
v = find_variant_by_arch (arch, mach);
if (!v)
return NULL;
tdep->regs = v->regs;
tdep->ppc_gp0_regnum = 0;
tdep->ppc_gplast_regnum = 31;
tdep->ppc_toc_regnum = 2;
tdep->ppc_ps_regnum = 65;
tdep->ppc_cr_regnum = 66;
tdep->ppc_lr_regnum = 67;
tdep->ppc_ctr_regnum = 68;
tdep->ppc_xer_regnum = 69;
if (v->mach == bfd_mach_ppc_601)
tdep->ppc_mq_regnum = 124;
else
tdep->ppc_mq_regnum = 70;
if (v->arch == bfd_arch_powerpc)
switch (v->mach)
{
case bfd_mach_ppc:
tdep->ppc_vr0_regnum = 71;
tdep->ppc_vrsave_regnum = 104;
break;
case bfd_mach_ppc_7400:
tdep->ppc_vr0_regnum = 119;
tdep->ppc_vrsave_regnum = 153;
break;
default:
tdep->ppc_vr0_regnum = -1;
tdep->ppc_vrsave_regnum = -1;
break;
}
tdep->regoff = xmalloc (v->nregs * sizeof (int));
for (i = off = 0; i < v->nregs; i++)
{
tdep->regoff[i] = off;
off += regsize (v->regs + i, wordsize);
}
set_gdbarch_read_pc (gdbarch, generic_target_read_pc);
set_gdbarch_write_pc (gdbarch, generic_target_write_pc);
set_gdbarch_read_fp (gdbarch, generic_target_read_fp);
set_gdbarch_read_sp (gdbarch, generic_target_read_sp);
set_gdbarch_write_sp (gdbarch, generic_target_write_sp);
set_gdbarch_num_regs (gdbarch, v->nregs);
set_gdbarch_sp_regnum (gdbarch, 1);
set_gdbarch_fp_regnum (gdbarch, 1);
set_gdbarch_pc_regnum (gdbarch, 64);
set_gdbarch_register_name (gdbarch, rs6000_register_name);
set_gdbarch_register_size (gdbarch, wordsize);
set_gdbarch_register_bytes (gdbarch, off);
set_gdbarch_register_byte (gdbarch, rs6000_register_byte);
set_gdbarch_register_raw_size (gdbarch, rs6000_register_raw_size);
set_gdbarch_max_register_raw_size (gdbarch, 16);
set_gdbarch_register_virtual_size (gdbarch, generic_register_virtual_size);
set_gdbarch_max_register_virtual_size (gdbarch, 16);
set_gdbarch_register_virtual_type (gdbarch, rs6000_register_virtual_type);
set_gdbarch_do_registers_info (gdbarch, rs6000_do_registers_info);
set_gdbarch_ptr_bit (gdbarch, wordsize * TARGET_CHAR_BIT);
set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT);
set_gdbarch_int_bit (gdbarch, 4 * TARGET_CHAR_BIT);
set_gdbarch_long_bit (gdbarch, wordsize * TARGET_CHAR_BIT);
set_gdbarch_long_long_bit (gdbarch, 8 * TARGET_CHAR_BIT);
set_gdbarch_float_bit (gdbarch, 4 * TARGET_CHAR_BIT);
set_gdbarch_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
set_gdbarch_char_signed (gdbarch, 0);
set_gdbarch_use_generic_dummy_frames (gdbarch, 1);
set_gdbarch_call_dummy_length (gdbarch, 0);
set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT);
set_gdbarch_call_dummy_address (gdbarch, entry_point_address);
set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1);
set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0);
set_gdbarch_call_dummy_start_offset (gdbarch, 0);
set_gdbarch_pc_in_call_dummy (gdbarch, generic_pc_in_call_dummy);
set_gdbarch_call_dummy_p (gdbarch, 1);
set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
set_gdbarch_get_saved_register (gdbarch, generic_get_saved_register);
set_gdbarch_fix_call_dummy (gdbarch, rs6000_fix_call_dummy);
set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame);
set_gdbarch_save_dummy_frame_tos (gdbarch, generic_save_dummy_frame_tos);
set_gdbarch_push_return_address (gdbarch, ppc_push_return_address);
set_gdbarch_believe_pcc_promotion (gdbarch, 1);
set_gdbarch_coerce_float_to_double (gdbarch, rs6000_coerce_float_to_double);
set_gdbarch_register_convertible (gdbarch, rs6000_register_convertible);
set_gdbarch_register_convert_to_virtual (gdbarch, rs6000_register_convert_to_virtual);
set_gdbarch_register_convert_to_raw (gdbarch, rs6000_register_convert_to_raw);
set_gdbarch_stab_reg_to_regnum (gdbarch, rs6000_stab_reg_to_regnum);
set_gdbarch_extract_return_value (gdbarch, rs6000_extract_return_value);
if (sysv_abi)
set_gdbarch_push_arguments (gdbarch, ppc_sysv_abi_push_arguments);
else
set_gdbarch_push_arguments (gdbarch, rs6000_push_arguments);
set_gdbarch_store_struct_return (gdbarch, rs6000_store_struct_return);
set_gdbarch_store_return_value (gdbarch, rs6000_store_return_value);
set_gdbarch_extract_struct_value_address (gdbarch, rs6000_extract_struct_value_address);
set_gdbarch_pop_frame (gdbarch, rs6000_pop_frame);
set_gdbarch_skip_prologue (gdbarch, rs6000_skip_prologue);
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
set_gdbarch_decr_pc_after_break (gdbarch, 0);
set_gdbarch_function_start_offset (gdbarch, 0);
set_gdbarch_breakpoint_from_pc (gdbarch, rs6000_breakpoint_from_pc);
set_gdbarch_frame_args_skip (gdbarch, 8);
if (sysv_abi)
{
if (osabi == ELFOSABI_LINUX
|| osabi == ELFOSABI_NETBSD
|| osabi == ELFOSABI_FREEBSD)
set_gdbarch_use_struct_convention (gdbarch,
generic_use_struct_convention);
else
set_gdbarch_use_struct_convention (gdbarch,
ppc_sysv_abi_use_struct_convention);
}
else
{
set_gdbarch_use_struct_convention (gdbarch,
generic_use_struct_convention);
}
set_gdbarch_frame_chain_valid (gdbarch, file_frame_chain_valid);
if (osabi == ELFOSABI_LINUX)
{
set_gdbarch_frameless_function_invocation (gdbarch,
ppc_linux_frameless_function_invocation);
set_gdbarch_frame_chain (gdbarch, ppc_linux_frame_chain);
set_gdbarch_frame_saved_pc (gdbarch, ppc_linux_frame_saved_pc);
set_gdbarch_frame_init_saved_regs (gdbarch,
ppc_linux_frame_init_saved_regs);
set_gdbarch_init_extra_frame_info (gdbarch,
ppc_linux_init_extra_frame_info);
set_gdbarch_memory_remove_breakpoint (gdbarch,
ppc_linux_memory_remove_breakpoint);
set_solib_svr4_fetch_link_map_offsets
(gdbarch, ppc_linux_svr4_fetch_link_map_offsets);
}
else
{
set_gdbarch_frameless_function_invocation (gdbarch,
rs6000_frameless_function_invocation);
set_gdbarch_frame_chain (gdbarch, rs6000_frame_chain);
set_gdbarch_frame_saved_pc (gdbarch, rs6000_frame_saved_pc);
set_gdbarch_frame_init_saved_regs (gdbarch, rs6000_frame_init_saved_regs);
set_gdbarch_init_extra_frame_info (gdbarch, rs6000_init_extra_frame_info);
set_gdbarch_convert_from_func_ptr_addr (gdbarch,
rs6000_convert_from_func_ptr_addr);
}
set_gdbarch_frame_args_address (gdbarch, rs6000_frame_args_address);
set_gdbarch_frame_locals_address (gdbarch, rs6000_frame_args_address);
set_gdbarch_saved_pc_after_call (gdbarch, rs6000_saved_pc_after_call);
set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown);
return gdbarch;
}
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);
}
void
_initialize_rs6000_tdep (void)
{
register_gdbarch_init (bfd_arch_rs6000, rs6000_gdbarch_init);
register_gdbarch_init (bfd_arch_powerpc, rs6000_gdbarch_init);
add_prefix_cmd ("powerpc", class_info, rs6000_info_powerpc_command,
"Various POWERPC info specific commands.",
&info_powerpc_cmdlist, "info powerpc ", 0, &infolist);
add_cmd ("altivec", class_info, rs6000_altivec_registers_info,
"Display the contents of the AltiVec registers.",
&info_powerpc_cmdlist);
}