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binutils-gdb/gdb/score-tdep.c
Luis Machado 098caef485 Refactor struct trad_frame_saved_regs 
The following patch drops the overloading going on with the trad_frame_saved_reg
struct and defines a new struct with a KIND enum and a union of different
fields.

The new struct looks like this:

struct trad_frame_saved_reg
 {
  setters/getters

  ...

private:

  trad_frame_saved_reg_kind m_kind;

  union {
    LONGEST value;
    int realreg;
    LONGEST addr;
    const gdb_byte *value_bytes;
  } m_reg;
};

And the enums look like this:

/* Describes the kind of encoding a stored register has.  */
enum class trad_frame_saved_reg_kind
{
  /* Register value is unknown.  */
  UNKNOWN = 0,
  /* Register value is a constant.  */
  VALUE,
  /* Register value is in another register.  */
  REALREG,
  /* Register value is at an address.  */
  ADDR,
  /* Register value is a sequence of bytes.  */
  VALUE_BYTES
};

The patch also adds setters/getters and updates all the users of the old
struct.

It is worth mentioning that due to the previous overloaded nature of the
fields, some tdep files like to store negative offsets and indexes in the ADDR
field, so I kept the ADDR as LONGEST instead of CORE_ADDR. Those cases may
be better supported by a new enum entry.

I have not addressed those cases in this patch to prevent unwanted breakage,
given I have no way to test some of the targets. But it would be nice to
clean those up eventually.

The change to frame-unwind.* is to constify the parameter being passed to the
unwinding functions, given we now accept a "const gdb_byte *" for value bytes.

Tested on aarch64-linux/Ubuntu 20.04/18.04 and by building GDB with
--enable-targets=all.

gdb/ChangeLog:

2021-01-04  Luis Machado  <luis.machado@linaro.org>

	Update all users of trad_frame_saved_reg to use the new member
	functions.

	Remote all struct keywords from declarations of trad_frame_saved_reg
	types, except on forward declarations.

	* aarch64-tdep.c: Update.
	* alpha-mdebug-tdep.c: Update.
	* alpha-tdep.c: Update.
	* arc-tdep.c: Update.
	* arm-tdep.c: Update.
	* avr-tdep.c: Update.
	* cris-tdep.c: Update.
	* csky-tdep.c: Update.
	* frv-tdep.c: Update.
	* hppa-linux-tdep.c: Update.
	* hppa-tdep.c: Update.
	* hppa-tdep.h: Update.
	* lm32-tdep.c: Update.
	* m32r-linux-tdep.c: Update.
	* m32r-tdep.c: Update.
	* m68hc11-tdep.c: Update.
	* mips-tdep.c: Update.
	* moxie-tdep.c: Update.
	* riscv-tdep.c: Update.
	* rs6000-tdep.c: Update.
	* s390-linux-tdep.c: Update.
	* s390-tdep.c: Update.
	* score-tdep.c: Update.
	* sparc-netbsd-tdep.c: Update.
	* sparc-sol2-tdep.c: Update.
	* sparc64-fbsd-tdep.c: Update.
	* sparc64-netbsd-tdep.c: Update.
	* sparc64-obsd-tdep.c: Update.
	* sparc64-sol2-tdep.c: Update.
	* tilegx-tdep.c: Update.
	* v850-tdep.c: Update.
	* vax-tdep.c: Update.

	* frame-unwind.c (frame_unwind_got_bytes): Make parameter const.
	* frame-unwind.h (frame_unwind_got_bytes): Likewise.

	* trad-frame.c: Update.
	Remove TF_REG_* enum.
	(trad_frame_alloc_saved_regs): Add a static assertion to check for
	a trivially-constructible struct.
	(trad_frame_reset_saved_regs): Adjust to use member function.
	(trad_frame_value_p): Likewise.
	(trad_frame_addr_p): Likewise.
	(trad_frame_realreg_p): Likewise.
	(trad_frame_value_bytes_p): Likewise.
	(trad_frame_set_value): Likewise.
	(trad_frame_set_realreg): Likewise.
	(trad_frame_set_addr): Likewise.
	(trad_frame_set_unknown): Likewise.
	(trad_frame_set_value_bytes): Likewise.
	(trad_frame_get_prev_register): Likewise.
	* trad-frame.h: Update.
	(trad_frame_saved_reg_kind): New enum.
	(struct trad_frame_saved_reg) <addr, realreg, data>: Remove.
	<m_kind, m_reg>: New member fields.
	<set_value, set_realreg, set_addr, set_unknown, set_value_bytes>
	<kind, value, realreg, addr, value_bytes, is_value, is_realreg>
	<is_addr, is_unknown, is_value_bytes>: New member functions.
2021-01-04 12:18:31 -03:00

1519 lines
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/* Target-dependent code for the S+core architecture, for GDB,
the GNU Debugger.
Copyright (C) 2006-2021 Free Software Foundation, Inc.
Contributed by Qinwei (qinwei@sunnorth.com.cn)
Contributed by Ching-Peng Lin (cplin@sunplus.com)
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 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "inferior.h"
#include "symtab.h"
#include "objfiles.h"
#include "gdbcore.h"
#include "target.h"
#include "arch-utils.h"
#include "regcache.h"
#include "regset.h"
#include "dis-asm.h"
#include "frame-unwind.h"
#include "frame-base.h"
#include "trad-frame.h"
#include "dwarf2/frame.h"
#include "score-tdep.h"
#define G_FLD(_i,_ms,_ls) \
((unsigned)((_i) << (31 - (_ms))) >> (31 - (_ms) + (_ls)))
typedef struct{
unsigned long long v;
unsigned long long raw;
unsigned int len;
}inst_t;
struct score_frame_cache
{
CORE_ADDR base;
CORE_ADDR fp;
trad_frame_saved_reg *saved_regs;
};
static int target_mach = bfd_mach_score7;
static struct type *
score_register_type (struct gdbarch *gdbarch, int regnum)
{
gdb_assert (regnum >= 0
&& regnum < ((target_mach == bfd_mach_score7)
? SCORE7_NUM_REGS : SCORE3_NUM_REGS));
return builtin_type (gdbarch)->builtin_uint32;
}
static const char *
score7_register_name (struct gdbarch *gdbarch, int regnum)
{
const char *score_register_names[] = {
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
"PSR", "COND", "ECR", "EXCPVEC", "CCR",
"EPC", "EMA", "TLBLOCK", "TLBPT", "PEADDR",
"TLBRPT", "PEVN", "PECTX", "LIMPFN", "LDMPFN",
"PREV", "DREG", "PC", "DSAVE", "COUNTER",
"LDCR", "STCR", "CEH", "CEL",
};
gdb_assert (regnum >= 0 && regnum < SCORE7_NUM_REGS);
return score_register_names[regnum];
}
static const char *
score3_register_name (struct gdbarch *gdbarch, int regnum)
{
const char *score_register_names[] = {
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
"PSR", "COND", "ECR", "EXCPVEC", "CCR",
"EPC", "EMA", "PREV", "DREG", "DSAVE",
"COUNTER", "LDCR", "STCR", "CEH", "CEL",
"", "", "PC",
};
gdb_assert (regnum >= 0 && regnum < SCORE3_NUM_REGS);
return score_register_names[regnum];
}
#if WITH_SIM
static int
score_register_sim_regno (struct gdbarch *gdbarch, int regnum)
{
gdb_assert (regnum >= 0
&& regnum < ((target_mach == bfd_mach_score7)
? SCORE7_NUM_REGS : SCORE3_NUM_REGS));
return regnum;
}
#endif
static inst_t *
score7_fetch_inst (struct gdbarch *gdbarch, CORE_ADDR addr, gdb_byte *memblock)
{
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
static inst_t inst = { 0, 0, 0 };
gdb_byte buf[SCORE_INSTLEN] = { 0 };
int big;
int ret;
if (target_has_execution () && memblock != NULL)
{
/* Fetch instruction from local MEMBLOCK. */
memcpy (buf, memblock, SCORE_INSTLEN);
}
else
{
/* Fetch instruction from target. */
ret = target_read_memory (addr & ~0x3, buf, SCORE_INSTLEN);
if (ret)
{
error (_("Error: target_read_memory in file:%s, line:%d!"),
__FILE__, __LINE__);
return 0;
}
}
inst.raw = extract_unsigned_integer (buf, SCORE_INSTLEN, byte_order);
inst.len = (inst.raw & 0x80008000) ? 4 : 2;
inst.v = ((inst.raw >> 16 & 0x7FFF) << 15) | (inst.raw & 0x7FFF);
big = (byte_order == BFD_ENDIAN_BIG);
if (inst.len == 2)
{
if (big ^ ((addr & 0x2) == 2))
inst.v = G_FLD (inst.v, 29, 15);
else
inst.v = G_FLD (inst.v, 14, 0);
}
return &inst;
}
static inst_t *
score3_adjust_pc_and_fetch_inst (CORE_ADDR *pcptr, int *lenptr,
enum bfd_endian byte_order)
{
static inst_t inst = { 0, 0, 0 };
struct breakplace
{
int break_offset;
int inst_len;
};
/* raw table 1 (column 2, 3, 4)
* 0 1 0 * # 2
* 0 1 1 0 # 3
0 1 1 0 * # 6
table 2 (column 1, 2, 3)
* 0 0 * * # 0, 4
0 1 0 * * # 2
1 1 0 * * # 6
*/
static const struct breakplace bk_table[16] =
{
/* table 1 */
{0, 0},
{0, 0},
{0, 4},
{0, 6},
{0, 0},
{0, 0},
{-2, 6},
{0, 0},
/* table 2 */
{0, 2},
{0, 0},
{-2, 4},
{0, 0},
{0, 2},
{0, 0},
{-4, 6},
{0, 0}
};
#define EXTRACT_LEN 2
CORE_ADDR adjust_pc = *pcptr & ~0x1;
gdb_byte buf[5][EXTRACT_LEN] =
{
{'\0', '\0'},
{'\0', '\0'},
{'\0', '\0'},
{'\0', '\0'},
{'\0', '\0'}
};
int ret;
unsigned int raw;
unsigned int cbits = 0;
int bk_index;
int i, count;
inst.v = 0;
inst.raw = 0;
inst.len = 0;
adjust_pc -= 4;
for (i = 0; i < 5; i++)
{
ret = target_read_memory (adjust_pc + 2 * i, buf[i], EXTRACT_LEN);
if (ret != 0)
{
buf[i][0] = '\0';
buf[i][1] = '\0';
if (i == 2)
error (_("Error: target_read_memory in file:%s, line:%d!"),
__FILE__, __LINE__);
}
raw = extract_unsigned_integer (buf[i], EXTRACT_LEN, byte_order);
cbits = (cbits << 1) | (raw >> 15);
}
adjust_pc += 4;
if (cbits & 0x4)
{
/* table 1 */
cbits = (cbits >> 1) & 0x7;
bk_index = cbits;
}
else
{
/* table 2 */
cbits = (cbits >> 2) & 0x7;
bk_index = cbits + 8;
}
gdb_assert (!((bk_table[bk_index].break_offset == 0)
&& (bk_table[bk_index].inst_len == 0)));
inst.len = bk_table[bk_index].inst_len;
i = (bk_table[bk_index].break_offset + 4) / 2;
count = inst.len / 2;
for (; count > 0; i++, count--)
{
inst.raw = (inst.raw << 16)
| extract_unsigned_integer (buf[i], EXTRACT_LEN, byte_order);
}
switch (inst.len)
{
case 2:
inst.v = inst.raw & 0x7FFF;
break;
case 4:
inst.v = ((inst.raw >> 16 & 0x7FFF) << 15) | (inst.raw & 0x7FFF);
break;
case 6:
inst.v = ((inst.raw >> 32 & 0x7FFF) << 30)
| ((inst.raw >> 16 & 0x7FFF) << 15) | (inst.raw & 0x7FFF);
break;
}
if (pcptr)
*pcptr = adjust_pc + bk_table[bk_index].break_offset;
if (lenptr)
*lenptr = bk_table[bk_index].inst_len;
#undef EXTRACT_LEN
return &inst;
}
/* Implement the breakpoint_kind_from_pc gdbarch method. */
static int
score7_breakpoint_kind_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr)
{
int ret;
unsigned int raw;
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
gdb_byte buf[SCORE_INSTLEN] = { 0 };
if ((ret = target_read_memory (*pcptr & ~0x3, buf, SCORE_INSTLEN)) != 0)
{
error (_("Error: target_read_memory in file:%s, line:%d!"),
__FILE__, __LINE__);
}
raw = extract_unsigned_integer (buf, SCORE_INSTLEN, byte_order);
if (!(raw & 0x80008000))
{
/* 16bits instruction. */
*pcptr &= ~0x1;
return 2;
}
else
{
/* 32bits instruction. */
*pcptr &= ~0x3;
return 4;
}
}
/* Implement the sw_breakpoint_from_kind gdbarch method. */
static const gdb_byte *
score7_sw_breakpoint_from_kind (struct gdbarch *gdbarch, int kind, int *size)
{
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
*size = kind;
if (kind == 4)
{
static gdb_byte big_breakpoint32[] = { 0x80, 0x00, 0x80, 0x06 };
static gdb_byte little_breakpoint32[] = { 0x06, 0x80, 0x00, 0x80 };
if (byte_order == BFD_ENDIAN_BIG)
return big_breakpoint32;
else
return little_breakpoint32;
}
else
{
static gdb_byte big_breakpoint16[] = { 0x60, 0x02 };
static gdb_byte little_breakpoint16[] = { 0x02, 0x60 };
if (byte_order == BFD_ENDIAN_BIG)
return big_breakpoint16;
else
return little_breakpoint16;
}
}
/* Implement the breakpoint_kind_from_pc gdbarch method. */
static int
score3_breakpoint_kind_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr)
{
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
int len;
score3_adjust_pc_and_fetch_inst (pcptr, &len, byte_order);
return len;
}
/* Implement the sw_breakpoint_from_kind gdbarch method. */
static const gdb_byte *
score3_sw_breakpoint_from_kind (struct gdbarch *gdbarch, int kind, int *size)
{
int index = 0;
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
static gdb_byte score_break_insns[6][6] = {
/* The following three instructions are big endian. */
{ 0x00, 0x20 },
{ 0x80, 0x00, 0x00, 0x06 },
{ 0x80, 0x00, 0x80, 0x00, 0x00, 0x00 },
/* The following three instructions are little endian. */
{ 0x20, 0x00 },
{ 0x00, 0x80, 0x06, 0x00 },
{ 0x00, 0x80, 0x00, 0x80, 0x00, 0x00 }};
*size = kind;
index = ((byte_order == BFD_ENDIAN_BIG) ? 0 : 3) + (kind / 2 - 1);
return score_break_insns[index];
}
static CORE_ADDR
score_adjust_breakpoint_address (struct gdbarch *gdbarch, CORE_ADDR bpaddr)
{
CORE_ADDR adjust_pc = bpaddr;
if (target_mach == bfd_mach_score3)
score3_adjust_pc_and_fetch_inst (&adjust_pc, NULL,
gdbarch_byte_order (gdbarch));
else
adjust_pc = align_down (adjust_pc, 2);
return adjust_pc;
}
static CORE_ADDR
score_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr)
{
return align_down (addr, 16);
}
static void
score_xfer_register (struct regcache *regcache, int regnum, int length,
enum bfd_endian endian, gdb_byte *readbuf,
const gdb_byte *writebuf, int buf_offset)
{
int reg_offset = 0;
gdb_assert (regnum >= 0
&& regnum < ((target_mach == bfd_mach_score7)
? SCORE7_NUM_REGS : SCORE3_NUM_REGS));
switch (endian)
{
case BFD_ENDIAN_BIG:
reg_offset = SCORE_REGSIZE - length;
break;
case BFD_ENDIAN_LITTLE:
reg_offset = 0;
break;
case BFD_ENDIAN_UNKNOWN:
reg_offset = 0;
break;
default:
error (_("Error: score_xfer_register in file:%s, line:%d!"),
__FILE__, __LINE__);
}
if (readbuf != NULL)
regcache->cooked_read_part (regnum, reg_offset, length,
readbuf + buf_offset);
if (writebuf != NULL)
regcache->cooked_write_part (regnum, reg_offset, length,
writebuf + buf_offset);
}
static enum return_value_convention
score_return_value (struct gdbarch *gdbarch, struct value *function,
struct type *type, struct regcache *regcache,
gdb_byte * readbuf, const gdb_byte * writebuf)
{
if (type->code () == TYPE_CODE_STRUCT
|| type->code () == TYPE_CODE_UNION
|| type->code () == TYPE_CODE_ARRAY)
return RETURN_VALUE_STRUCT_CONVENTION;
else
{
int offset;
int regnum;
for (offset = 0, regnum = SCORE_A0_REGNUM;
offset < TYPE_LENGTH (type);
offset += SCORE_REGSIZE, regnum++)
{
int xfer = SCORE_REGSIZE;
if (offset + xfer > TYPE_LENGTH (type))
xfer = TYPE_LENGTH (type) - offset;
score_xfer_register (regcache, regnum, xfer,
gdbarch_byte_order(gdbarch),
readbuf, writebuf, offset);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
}
static int
score_type_needs_double_align (struct type *type)
{
enum type_code typecode = type->code ();
if ((typecode == TYPE_CODE_INT && TYPE_LENGTH (type) == 8)
|| (typecode == TYPE_CODE_FLT && TYPE_LENGTH (type) == 8))
return 1;
else if (typecode == TYPE_CODE_STRUCT || typecode == TYPE_CODE_UNION)
{
int i, n;
n = type->num_fields ();
for (i = 0; i < n; i++)
if (score_type_needs_double_align (type->field (i).type ()))
return 1;
return 0;
}
return 0;
}
static CORE_ADDR
score_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
struct regcache *regcache, CORE_ADDR bp_addr,
int nargs, struct value **args, CORE_ADDR sp,
function_call_return_method return_method,
CORE_ADDR struct_addr)
{
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
int argnum;
int argreg;
int arglen = 0;
CORE_ADDR stack_offset = 0;
CORE_ADDR addr = 0;
/* Step 1, Save RA. */
regcache_cooked_write_unsigned (regcache, SCORE_RA_REGNUM, bp_addr);
/* Step 2, Make space on the stack for the args. */
struct_addr = align_down (struct_addr, 16);
sp = align_down (sp, 16);
for (argnum = 0; argnum < nargs; argnum++)
arglen += align_up (TYPE_LENGTH (value_type (args[argnum])),
SCORE_REGSIZE);
sp -= align_up (arglen, 16);
argreg = SCORE_BEGIN_ARG_REGNUM;
/* Step 3, Check if struct return then save the struct address to
r4 and increase the stack_offset by 4. */
if (return_method == return_method_struct)
{
regcache_cooked_write_unsigned (regcache, argreg++, struct_addr);
stack_offset += SCORE_REGSIZE;
}
/* Step 4, Load arguments:
If arg length is too long (> 4 bytes), then split the arg and
save every parts. */
for (argnum = 0; argnum < nargs; argnum++)
{
struct value *arg = args[argnum];
struct type *arg_type = check_typedef (value_type (arg));
enum type_code typecode = arg_type->code ();
const gdb_byte *val = value_contents (arg);
int downward_offset = 0;
int arg_last_part_p = 0;
arglen = TYPE_LENGTH (arg_type);
/* If a arg should be aligned to 8 bytes (long long or double),
the value should be put to even register numbers. */
if (score_type_needs_double_align (arg_type))
{
if (argreg & 1)
argreg++;
}
/* If sizeof a block < SCORE_REGSIZE, then Score GCC will chose
the default "downward"/"upward" method:
Example:
struct struc
{
char a; char b; char c;
} s = {'a', 'b', 'c'};
Big endian: s = {X, 'a', 'b', 'c'}
Little endian: s = {'a', 'b', 'c', X}
Where X is a hole. */
if (gdbarch_byte_order(gdbarch) == BFD_ENDIAN_BIG
&& (typecode == TYPE_CODE_STRUCT
|| typecode == TYPE_CODE_UNION)
&& argreg > SCORE_LAST_ARG_REGNUM
&& arglen < SCORE_REGSIZE)
downward_offset += (SCORE_REGSIZE - arglen);
while (arglen > 0)
{
int partial_len = arglen < SCORE_REGSIZE ? arglen : SCORE_REGSIZE;
ULONGEST regval = extract_unsigned_integer (val, partial_len,
byte_order);
/* The last part of a arg should shift left when
gdbarch_byte_order is BFD_ENDIAN_BIG. */
if (byte_order == BFD_ENDIAN_BIG
&& arg_last_part_p == 1
&& (typecode == TYPE_CODE_STRUCT
|| typecode == TYPE_CODE_UNION))
regval <<= ((SCORE_REGSIZE - partial_len) * TARGET_CHAR_BIT);
/* Always increase the stack_offset and save args to stack. */
addr = sp + stack_offset + downward_offset;
write_memory (addr, val, partial_len);
if (argreg <= SCORE_LAST_ARG_REGNUM)
{
regcache_cooked_write_unsigned (regcache, argreg++, regval);
if (arglen > SCORE_REGSIZE && arglen < SCORE_REGSIZE * 2)
arg_last_part_p = 1;
}
val += partial_len;
arglen -= partial_len;
stack_offset += align_up (partial_len, SCORE_REGSIZE);
}
}
/* Step 5, Save SP. */
regcache_cooked_write_unsigned (regcache, SCORE_SP_REGNUM, sp);
return sp;
}
static CORE_ADDR
score7_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
{
CORE_ADDR cpc = pc;
int iscan = 32, stack_sub = 0;
while (iscan-- > 0)
{
inst_t *inst = score7_fetch_inst (gdbarch, cpc, NULL);
if (!inst)
break;
if ((inst->len == 4) && !stack_sub
&& (G_FLD (inst->v, 29, 25) == 0x1
&& G_FLD (inst->v, 24, 20) == 0x0))
{
/* addi r0, offset */
stack_sub = cpc + SCORE_INSTLEN;
pc = cpc + SCORE_INSTLEN;
}
else if ((inst->len == 4)
&& (G_FLD (inst->v, 29, 25) == 0x0)
&& (G_FLD (inst->v, 24, 20) == 0x2)
&& (G_FLD (inst->v, 19, 15) == 0x0)
&& (G_FLD (inst->v, 14, 10) == 0xF)
&& (G_FLD (inst->v, 9, 0) == 0x56))
{
/* mv r2, r0 */
pc = cpc + SCORE_INSTLEN;
break;
}
else if ((inst->len == 2)
&& (G_FLD (inst->v, 14, 12) == 0x0)
&& (G_FLD (inst->v, 11, 8) == 0x2)
&& (G_FLD (inst->v, 7, 4) == 0x0)
&& (G_FLD (inst->v, 3, 0) == 0x3))
{
/* mv! r2, r0 */
pc = cpc + SCORE16_INSTLEN;
break;
}
else if ((inst->len == 2)
&& ((G_FLD (inst->v, 14, 12) == 3) /* j15 form */
|| (G_FLD (inst->v, 14, 12) == 4) /* b15 form */
|| (G_FLD (inst->v, 14, 12) == 0x0
&& G_FLD (inst->v, 3, 0) == 0x4))) /* br! */
break;
else if ((inst->len == 4)
&& ((G_FLD (inst->v, 29, 25) == 2) /* j32 form */
|| (G_FLD (inst->v, 29, 25) == 4) /* b32 form */
|| (G_FLD (inst->v, 29, 25) == 0x0
&& G_FLD (inst->v, 6, 1) == 0x4))) /* br */
break;
cpc += (inst->len == 2) ? SCORE16_INSTLEN : SCORE_INSTLEN;
}
return pc;
}
static CORE_ADDR
score3_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
{
CORE_ADDR cpc = pc;
int iscan = 32, stack_sub = 0;
while (iscan-- > 0)
{
inst_t *inst
= score3_adjust_pc_and_fetch_inst (&cpc, NULL,
gdbarch_byte_order (gdbarch));
if (!inst)
break;
if (inst->len == 4 && !stack_sub
&& (G_FLD (inst->v, 29, 25) == 0x1)
&& (G_FLD (inst->v, 19, 17) == 0x0)
&& (G_FLD (inst->v, 24, 20) == 0x0))
{
/* addi r0, offset */
stack_sub = cpc + inst->len;
pc = cpc + inst->len;
}
else if (inst->len == 4
&& (G_FLD (inst->v, 29, 25) == 0x0)
&& (G_FLD (inst->v, 24, 20) == 0x2)
&& (G_FLD (inst->v, 19, 15) == 0x0)
&& (G_FLD (inst->v, 14, 10) == 0xF)
&& (G_FLD (inst->v, 9, 0) == 0x56))
{
/* mv r2, r0 */
pc = cpc + inst->len;
break;
}
else if ((inst->len == 2)
&& (G_FLD (inst->v, 14, 10) == 0x10)
&& (G_FLD (inst->v, 9, 5) == 0x2)
&& (G_FLD (inst->v, 4, 0) == 0x0))
{
/* mv! r2, r0 */
pc = cpc + inst->len;
break;
}
else if (inst->len == 2
&& ((G_FLD (inst->v, 14, 12) == 3) /* b15 form */
|| (G_FLD (inst->v, 14, 12) == 0x0
&& G_FLD (inst->v, 11, 5) == 0x4))) /* br! */
break;
else if (inst->len == 4
&& ((G_FLD (inst->v, 29, 25) == 2) /* j32 form */
|| (G_FLD (inst->v, 29, 25) == 4))) /* b32 form */
break;
cpc += inst->len;
}
return pc;
}
/* Implement the stack_frame_destroyed_p gdbarch method. */
static int
score7_stack_frame_destroyed_p (struct gdbarch *gdbarch, CORE_ADDR cur_pc)
{
inst_t *inst = score7_fetch_inst (gdbarch, cur_pc, NULL);
if (inst->v == 0x23)
return 1; /* mv! r0, r2 */
else if (G_FLD (inst->v, 14, 12) == 0x2
&& G_FLD (inst->v, 3, 0) == 0xa)
return 1; /* pop! */
else if (G_FLD (inst->v, 14, 12) == 0x0
&& G_FLD (inst->v, 7, 0) == 0x34)
return 1; /* br! r3 */
else if (G_FLD (inst->v, 29, 15) == 0x2
&& G_FLD (inst->v, 6, 1) == 0x2b)
return 1; /* mv r0, r2 */
else if (G_FLD (inst->v, 29, 25) == 0x0
&& G_FLD (inst->v, 6, 1) == 0x4
&& G_FLD (inst->v, 19, 15) == 0x3)
return 1; /* br r3 */
else
return 0;
}
/* Implement the stack_frame_destroyed_p gdbarch method. */
static int
score3_stack_frame_destroyed_p (struct gdbarch *gdbarch, CORE_ADDR cur_pc)
{
CORE_ADDR pc = cur_pc;
inst_t *inst
= score3_adjust_pc_and_fetch_inst (&pc, NULL,
gdbarch_byte_order (gdbarch));
if (inst->len == 2
&& (G_FLD (inst->v, 14, 10) == 0x10)
&& (G_FLD (inst->v, 9, 5) == 0x0)
&& (G_FLD (inst->v, 4, 0) == 0x2))
return 1; /* mv! r0, r2 */
else if (inst->len == 4
&& (G_FLD (inst->v, 29, 25) == 0x0)
&& (G_FLD (inst->v, 24, 20) == 0x2)
&& (G_FLD (inst->v, 19, 15) == 0x0)
&& (G_FLD (inst->v, 14, 10) == 0xF)
&& (G_FLD (inst->v, 9, 0) == 0x56))
return 1; /* mv r0, r2 */
else if (inst->len == 2
&& (G_FLD (inst->v, 14, 12) == 0x0)
&& (G_FLD (inst->v, 11, 5) == 0x2))
return 1; /* pop! */
else if (inst->len == 2
&& (G_FLD (inst->v, 14, 12) == 0x0)
&& (G_FLD (inst->v, 11, 7) == 0x0)
&& (G_FLD (inst->v, 6, 5) == 0x2))
return 1; /* rpop! */
else if (inst->len == 2
&& (G_FLD (inst->v, 14, 12) == 0x0)
&& (G_FLD (inst->v, 11, 5) == 0x4)
&& (G_FLD (inst->v, 4, 0) == 0x3))
return 1; /* br! r3 */
else if (inst->len == 4
&& (G_FLD (inst->v, 29, 25) == 0x0)
&& (G_FLD (inst->v, 24, 20) == 0x0)
&& (G_FLD (inst->v, 19, 15) == 0x3)
&& (G_FLD (inst->v, 14, 10) == 0xF)
&& (G_FLD (inst->v, 9, 0) == 0x8))
return 1; /* br r3 */
else
return 0;
}
static gdb_byte *
score7_malloc_and_get_memblock (CORE_ADDR addr, CORE_ADDR size)
{
int ret;
gdb_byte *memblock = NULL;
if (size == 0)
return NULL;
memblock = (gdb_byte *) xmalloc (size);
memset (memblock, 0, size);
ret = target_read_memory (addr & ~0x3, memblock, size);
if (ret)
{
error (_("Error: target_read_memory in file:%s, line:%d!"),
__FILE__, __LINE__);
return NULL;
}
return memblock;
}
static void
score7_free_memblock (gdb_byte *memblock)
{
xfree (memblock);
}
static void
score7_adjust_memblock_ptr (gdb_byte **memblock, CORE_ADDR prev_pc,
CORE_ADDR cur_pc)
{
if (prev_pc == -1)
{
/* First time call this function, do nothing. */
}
else if (cur_pc - prev_pc == 2 && (cur_pc & 0x3) == 0)
{
/* First 16-bit instruction, then 32-bit instruction. */
*memblock += SCORE_INSTLEN;
}
else if (cur_pc - prev_pc == 4)
{
/* Is 32-bit instruction, increase MEMBLOCK by 4. */
*memblock += SCORE_INSTLEN;
}
}
static void
score7_analyze_prologue (CORE_ADDR startaddr, CORE_ADDR pc,
struct frame_info *this_frame,
struct score_frame_cache *this_cache)
{
struct gdbarch *gdbarch = get_frame_arch (this_frame);
CORE_ADDR sp;
CORE_ADDR fp;
CORE_ADDR cur_pc = startaddr;
int sp_offset = 0;
int ra_offset = 0;
int fp_offset = 0;
int ra_offset_p = 0;
int fp_offset_p = 0;
int inst_len = 0;
gdb_byte *memblock = NULL;
gdb_byte *memblock_ptr = NULL;
CORE_ADDR prev_pc = -1;
/* Allocate MEMBLOCK if PC - STARTADDR > 0. */
memblock_ptr = memblock =
score7_malloc_and_get_memblock (startaddr, pc - startaddr);
sp = get_frame_register_unsigned (this_frame, SCORE_SP_REGNUM);
fp = get_frame_register_unsigned (this_frame, SCORE_FP_REGNUM);
for (; cur_pc < pc; prev_pc = cur_pc, cur_pc += inst_len)
{
inst_t *inst = NULL;
if (memblock != NULL)
{
/* Reading memory block from target successfully and got all
the instructions(from STARTADDR to PC) needed. */
score7_adjust_memblock_ptr (&memblock, prev_pc, cur_pc);
inst = score7_fetch_inst (gdbarch, cur_pc, memblock);
}
else
{
/* Otherwise, we fetch 4 bytes from target, and GDB also
work correctly. */
inst = score7_fetch_inst (gdbarch, cur_pc, NULL);
}
/* FIXME: make a full-power prologue analyzer. */
if (inst->len == 2)
{
inst_len = SCORE16_INSTLEN;
if (G_FLD (inst->v, 14, 12) == 0x2
&& G_FLD (inst->v, 3, 0) == 0xe)
{
/* push! */
sp_offset += 4;
if (G_FLD (inst->v, 11, 7) == 0x6
&& ra_offset_p == 0)
{
/* push! r3, [r0] */
ra_offset = sp_offset;
ra_offset_p = 1;
}
else if (G_FLD (inst->v, 11, 7) == 0x4
&& fp_offset_p == 0)
{
/* push! r2, [r0] */
fp_offset = sp_offset;
fp_offset_p = 1;
}
}
else if (G_FLD (inst->v, 14, 12) == 0x2
&& G_FLD (inst->v, 3, 0) == 0xa)
{
/* pop! */
sp_offset -= 4;
}
else if (G_FLD (inst->v, 14, 7) == 0xc1
&& G_FLD (inst->v, 2, 0) == 0x0)
{
/* subei! r0, n */
sp_offset += (int) pow (2.0, G_FLD (inst->v, 6, 3));
}
else if (G_FLD (inst->v, 14, 7) == 0xc0
&& G_FLD (inst->v, 2, 0) == 0x0)
{
/* addei! r0, n */
/* Solaris 11+gcc 5.5 has ambiguous overloads of pow, so we
pass 2.0 instead of 2 to get the right one. */
sp_offset -= (int) pow (2.0, G_FLD (inst->v, 6, 3));
}
}
else
{
inst_len = SCORE_INSTLEN;
if (G_FLD(inst->v, 29, 25) == 0x3
&& G_FLD(inst->v, 2, 0) == 0x4
&& G_FLD(inst->v, 19, 15) == 0)
{
/* sw rD, [r0, offset]+ */
sp_offset += SCORE_INSTLEN;
if (G_FLD(inst->v, 24, 20) == 0x3)
{
/* rD = r3 */
if (ra_offset_p == 0)
{
ra_offset = sp_offset;
ra_offset_p = 1;
}
}
else if (G_FLD(inst->v, 24, 20) == 0x2)
{
/* rD = r2 */
if (fp_offset_p == 0)
{
fp_offset = sp_offset;
fp_offset_p = 1;
}
}
}
else if (G_FLD(inst->v, 29, 25) == 0x14
&& G_FLD(inst->v, 19,15) == 0)
{
/* sw rD, [r0, offset] */
if (G_FLD(inst->v, 24, 20) == 0x3)
{
/* rD = r3 */
ra_offset = sp_offset - G_FLD(inst->v, 14, 0);
ra_offset_p = 1;
}
else if (G_FLD(inst->v, 24, 20) == 0x2)
{
/* rD = r2 */
fp_offset = sp_offset - G_FLD(inst->v, 14, 0);
fp_offset_p = 1;
}
}
else if (G_FLD (inst->v, 29, 15) == 0x1c60
&& G_FLD (inst->v, 2, 0) == 0x0)
{
/* lw r3, [r0]+, 4 */
sp_offset -= SCORE_INSTLEN;
ra_offset_p = 1;
}
else if (G_FLD (inst->v, 29, 15) == 0x1c40
&& G_FLD (inst->v, 2, 0) == 0x0)
{
/* lw r2, [r0]+, 4 */
sp_offset -= SCORE_INSTLEN;
fp_offset_p = 1;
}
else if (G_FLD (inst->v, 29, 17) == 0x100
&& G_FLD (inst->v, 0, 0) == 0x0)
{
/* addi r0, -offset */
sp_offset += 65536 - G_FLD (inst->v, 16, 1);
}
else if (G_FLD (inst->v, 29, 17) == 0x110
&& G_FLD (inst->v, 0, 0) == 0x0)
{
/* addi r2, offset */
if (pc - cur_pc > 4)
{
unsigned int save_v = inst->v;
inst_t *inst2 =
score7_fetch_inst (gdbarch, cur_pc + SCORE_INSTLEN, NULL);
if (inst2->v == 0x23)
{
/* mv! r0, r2 */
sp_offset -= G_FLD (save_v, 16, 1);
}
}
}
}
}
/* Save RA. */
if (ra_offset_p == 1)
{
if (this_cache->saved_regs[SCORE_PC_REGNUM].is_realreg ())
this_cache->saved_regs[SCORE_PC_REGNUM].set_addr (sp + sp_offset
- ra_offset);
}
else
{
this_cache->saved_regs[SCORE_PC_REGNUM] =
this_cache->saved_regs[SCORE_RA_REGNUM];
}
/* Save FP. */
if (fp_offset_p == 1)
{
if (this_cache->saved_regs[SCORE_FP_REGNUM].is_realreg ())
this_cache->saved_regs[SCORE_FP_REGNUM].set_addr (sp + sp_offset
- fp_offset);
}
/* Save SP and FP. */
this_cache->base = sp + sp_offset;
this_cache->fp = fp;
/* Don't forget to free MEMBLOCK if we allocated it. */
if (memblock_ptr != NULL)
score7_free_memblock (memblock_ptr);
}
static void
score3_analyze_prologue (CORE_ADDR startaddr, CORE_ADDR pc,
struct frame_info *this_frame,
struct score_frame_cache *this_cache)
{
CORE_ADDR sp;
CORE_ADDR fp;
CORE_ADDR cur_pc = startaddr;
enum bfd_endian byte_order
= gdbarch_byte_order (get_frame_arch (this_frame));
int sp_offset = 0;
int ra_offset = 0;
int fp_offset = 0;
int ra_offset_p = 0;
int fp_offset_p = 0;
int inst_len = 0;
sp = get_frame_register_unsigned (this_frame, SCORE_SP_REGNUM);
fp = get_frame_register_unsigned (this_frame, SCORE_FP_REGNUM);
for (; cur_pc < pc; cur_pc += inst_len)
{
inst_t *inst = NULL;
inst = score3_adjust_pc_and_fetch_inst (&cur_pc, &inst_len, byte_order);
/* FIXME: make a full-power prologue analyzer. */
if (inst->len == 2)
{
if (G_FLD (inst->v, 14, 12) == 0x0
&& G_FLD (inst->v, 11, 7) == 0x0
&& G_FLD (inst->v, 6, 5) == 0x3)
{
/* push! */
sp_offset += 4;
if (G_FLD (inst->v, 4, 0) == 0x3
&& ra_offset_p == 0)
{
/* push! r3, [r0] */
ra_offset = sp_offset;
ra_offset_p = 1;
}
else if (G_FLD (inst->v, 4, 0) == 0x2
&& fp_offset_p == 0)
{
/* push! r2, [r0] */
fp_offset = sp_offset;
fp_offset_p = 1;
}
}
else if (G_FLD (inst->v, 14, 12) == 0x6
&& G_FLD (inst->v, 11, 10) == 0x3)
{
/* rpush! */
int start_r = G_FLD (inst->v, 9, 5);
int cnt = G_FLD (inst->v, 4, 0);
if ((ra_offset_p == 0)
&& (start_r <= SCORE_RA_REGNUM)
&& (SCORE_RA_REGNUM < start_r + cnt))
{
/* rpush! contains r3 */
ra_offset_p = 1;
ra_offset = sp_offset + 4 * (SCORE_RA_REGNUM - start_r) + 4;
}
if ((fp_offset_p == 0)
&& (start_r <= SCORE_FP_REGNUM)
&& (SCORE_FP_REGNUM < start_r + cnt))
{
/* rpush! contains r2 */
fp_offset_p = 1;
fp_offset = sp_offset + 4 * (SCORE_FP_REGNUM - start_r) + 4;
}
sp_offset += 4 * cnt;
}
else if (G_FLD (inst->v, 14, 12) == 0x0
&& G_FLD (inst->v, 11, 7) == 0x0
&& G_FLD (inst->v, 6, 5) == 0x2)
{
/* pop! */
sp_offset -= 4;
}
else if (G_FLD (inst->v, 14, 12) == 0x6
&& G_FLD (inst->v, 11, 10) == 0x2)
{
/* rpop! */
sp_offset -= 4 * G_FLD (inst->v, 4, 0);
}
else if (G_FLD (inst->v, 14, 12) == 0x5
&& G_FLD (inst->v, 11, 10) == 0x3
&& G_FLD (inst->v, 9, 6) == 0x0)
{
/* addi! r0, -offset */
int imm = G_FLD (inst->v, 5, 0);
if (imm >> 5)
imm = -(0x3F - imm + 1);
sp_offset -= imm;
}
else if (G_FLD (inst->v, 14, 12) == 0x5
&& G_FLD (inst->v, 11, 10) == 0x3
&& G_FLD (inst->v, 9, 6) == 0x2)
{
/* addi! r2, offset */
if (pc - cur_pc >= 2)
{
inst_t *inst2;
cur_pc += inst->len;
inst2 = score3_adjust_pc_and_fetch_inst (&cur_pc, NULL,
byte_order);
if (inst2->len == 2
&& G_FLD (inst2->v, 14, 10) == 0x10
&& G_FLD (inst2->v, 9, 5) == 0x0
&& G_FLD (inst2->v, 4, 0) == 0x2)
{
/* mv! r0, r2 */
int imm = G_FLD (inst->v, 5, 0);
if (imm >> 5)
imm = -(0x3F - imm + 1);
sp_offset -= imm;
}
}
}
}
else if (inst->len == 4)
{
if (G_FLD (inst->v, 29, 25) == 0x3
&& G_FLD (inst->v, 2, 0) == 0x4
&& G_FLD (inst->v, 24, 20) == 0x3
&& G_FLD (inst->v, 19, 15) == 0x0)
{
/* sw r3, [r0, offset]+ */
sp_offset += inst->len;
if (ra_offset_p == 0)
{
ra_offset = sp_offset;
ra_offset_p = 1;
}
}
else if (G_FLD (inst->v, 29, 25) == 0x3
&& G_FLD (inst->v, 2, 0) == 0x4
&& G_FLD (inst->v, 24, 20) == 0x2
&& G_FLD (inst->v, 19, 15) == 0x0)
{
/* sw r2, [r0, offset]+ */
sp_offset += inst->len;
if (fp_offset_p == 0)
{
fp_offset = sp_offset;
fp_offset_p = 1;
}
}
else if (G_FLD (inst->v, 29, 25) == 0x7
&& G_FLD (inst->v, 2, 0) == 0x0
&& G_FLD (inst->v, 24, 20) == 0x3
&& G_FLD (inst->v, 19, 15) == 0x0)
{
/* lw r3, [r0]+, 4 */
sp_offset -= inst->len;
ra_offset_p = 1;
}
else if (G_FLD (inst->v, 29, 25) == 0x7
&& G_FLD (inst->v, 2, 0) == 0x0
&& G_FLD (inst->v, 24, 20) == 0x2
&& G_FLD (inst->v, 19, 15) == 0x0)
{
/* lw r2, [r0]+, 4 */
sp_offset -= inst->len;
fp_offset_p = 1;
}
else if (G_FLD (inst->v, 29, 25) == 0x1
&& G_FLD (inst->v, 19, 17) == 0x0
&& G_FLD (inst->v, 24, 20) == 0x0
&& G_FLD (inst->v, 0, 0) == 0x0)
{
/* addi r0, -offset */
int imm = G_FLD (inst->v, 16, 1);
if (imm >> 15)
imm = -(0xFFFF - imm + 1);
sp_offset -= imm;
}
else if (G_FLD (inst->v, 29, 25) == 0x1
&& G_FLD (inst->v, 19, 17) == 0x0
&& G_FLD (inst->v, 24, 20) == 0x2
&& G_FLD (inst->v, 0, 0) == 0x0)
{
/* addi r2, offset */
if (pc - cur_pc >= 2)
{
inst_t *inst2;
cur_pc += inst->len;
inst2 = score3_adjust_pc_and_fetch_inst (&cur_pc, NULL,
byte_order);
if (inst2->len == 2
&& G_FLD (inst2->v, 14, 10) == 0x10
&& G_FLD (inst2->v, 9, 5) == 0x0
&& G_FLD (inst2->v, 4, 0) == 0x2)
{
/* mv! r0, r2 */
int imm = G_FLD (inst->v, 16, 1);
if (imm >> 15)
imm = -(0xFFFF - imm + 1);
sp_offset -= imm;
}
}
}
}
}
/* Save RA. */
if (ra_offset_p == 1)
{
if (this_cache->saved_regs[SCORE_PC_REGNUM].is_realreg ())
this_cache->saved_regs[SCORE_PC_REGNUM].set_addr (sp + sp_offset
- ra_offset);
}
else
{
this_cache->saved_regs[SCORE_PC_REGNUM] =
this_cache->saved_regs[SCORE_RA_REGNUM];
}
/* Save FP. */
if (fp_offset_p == 1)
{
if (this_cache->saved_regs[SCORE_FP_REGNUM].is_realreg ())
this_cache->saved_regs[SCORE_FP_REGNUM].set_addr (sp + sp_offset
- fp_offset);
}
/* Save SP and FP. */
this_cache->base = sp + sp_offset;
this_cache->fp = fp;
}
static struct score_frame_cache *
score_make_prologue_cache (struct frame_info *this_frame, void **this_cache)
{
struct score_frame_cache *cache;
if ((*this_cache) != NULL)
return (struct score_frame_cache *) (*this_cache);
cache = FRAME_OBSTACK_ZALLOC (struct score_frame_cache);
(*this_cache) = cache;
cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
/* Analyze the prologue. */
{
const CORE_ADDR pc = get_frame_pc (this_frame);
CORE_ADDR start_addr;
find_pc_partial_function (pc, NULL, &start_addr, NULL);
if (start_addr == 0)
return cache;
if (target_mach == bfd_mach_score3)
score3_analyze_prologue (start_addr, pc, this_frame,
(struct score_frame_cache *) *this_cache);
else
score7_analyze_prologue (start_addr, pc, this_frame,
(struct score_frame_cache *) *this_cache);
}
/* Save SP. */
trad_frame_set_value (cache->saved_regs, SCORE_SP_REGNUM, cache->base);
return (struct score_frame_cache *) (*this_cache);
}
static void
score_prologue_this_id (struct frame_info *this_frame, void **this_cache,
struct frame_id *this_id)
{
struct score_frame_cache *info = score_make_prologue_cache (this_frame,
this_cache);
(*this_id) = frame_id_build (info->base, get_frame_func (this_frame));
}
static struct value *
score_prologue_prev_register (struct frame_info *this_frame,
void **this_cache, int regnum)
{
struct score_frame_cache *info = score_make_prologue_cache (this_frame,
this_cache);
return trad_frame_get_prev_register (this_frame, info->saved_regs, regnum);
}
static const struct frame_unwind score_prologue_unwind =
{
NORMAL_FRAME,
default_frame_unwind_stop_reason,
score_prologue_this_id,
score_prologue_prev_register,
NULL,
default_frame_sniffer,
NULL
};
static CORE_ADDR
score_prologue_frame_base_address (struct frame_info *this_frame,
void **this_cache)
{
struct score_frame_cache *info =
score_make_prologue_cache (this_frame, this_cache);
return info->fp;
}
static const struct frame_base score_prologue_frame_base =
{
&score_prologue_unwind,
score_prologue_frame_base_address,
score_prologue_frame_base_address,
score_prologue_frame_base_address,
};
static const struct frame_base *
score_prologue_frame_base_sniffer (struct frame_info *this_frame)
{
return &score_prologue_frame_base;
}
/* Core file support. */
static const struct regcache_map_entry score7_linux_gregmap[] =
{
/* FIXME: According to the current Linux kernel, r0 is preceded by
9 rather than 7 words. */
{ 7, REGCACHE_MAP_SKIP, 4 },
{ 32, 0, 4 }, /* r0 ... r31 */
{ 1, 55, 4 }, /* CEL */
{ 1, 54, 4 }, /* CEH */
{ 1, 53, 4 }, /* sr0, i.e. cnt or COUNTER */
{ 1, 52, 4 }, /* sr1, i.e. lcr or LDCR */
{ 1, 51, 4 }, /* sr2, i.e. scr or STCR */
{ 1, 49, 4 }, /* PC (same slot as EPC) */
{ 1, 38, 4 }, /* EMA */
{ 1, 32, 4 }, /* PSR */
{ 1, 34, 4 }, /* ECR */
{ 1, 33, 4 }, /* COND */
{ 0 }
};
#define SCORE7_LINUX_EPC_OFFSET (44 * 4)
#define SCORE7_LINUX_SIZEOF_GREGSET (49 * 4)
static void
score7_linux_supply_gregset(const struct regset *regset,
struct regcache *regcache,
int regnum, const void *buf,
size_t size)
{
regcache_supply_regset (regset, regcache, regnum, buf, size);
/* Supply the EPC from the same slot as the PC. Note that the
collect function will store the PC in that slot. */
if ((regnum == -1 || regnum == SCORE_EPC_REGNUM)
&& size >= SCORE7_LINUX_EPC_OFFSET + 4)
regcache->raw_supply
(SCORE_EPC_REGNUM, (const gdb_byte *) buf + SCORE7_LINUX_EPC_OFFSET);
}
static const struct regset score7_linux_gregset =
{
score7_linux_gregmap,
score7_linux_supply_gregset,
regcache_collect_regset
};
/* Iterate over core file register note sections. */
static void
score7_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
iterate_over_regset_sections_cb *cb,
void *cb_data,
const struct regcache *regcache)
{
cb (".reg", SCORE7_LINUX_SIZEOF_GREGSET, SCORE7_LINUX_SIZEOF_GREGSET,
&score7_linux_gregset, NULL, cb_data);
}
static struct gdbarch *
score_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
{
struct gdbarch *gdbarch;
target_mach = info.bfd_arch_info->mach;
arches = gdbarch_list_lookup_by_info (arches, &info);
if (arches != NULL)
{
return (arches->gdbarch);
}
gdbarch = gdbarch_alloc (&info, NULL);
set_gdbarch_short_bit (gdbarch, 16);
set_gdbarch_int_bit (gdbarch, 32);
set_gdbarch_float_bit (gdbarch, 32);
set_gdbarch_double_bit (gdbarch, 64);
set_gdbarch_long_double_bit (gdbarch, 64);
#if WITH_SIM
set_gdbarch_register_sim_regno (gdbarch, score_register_sim_regno);
#endif
set_gdbarch_pc_regnum (gdbarch, SCORE_PC_REGNUM);
set_gdbarch_sp_regnum (gdbarch, SCORE_SP_REGNUM);
set_gdbarch_adjust_breakpoint_address (gdbarch,
score_adjust_breakpoint_address);
set_gdbarch_register_type (gdbarch, score_register_type);
set_gdbarch_frame_align (gdbarch, score_frame_align);
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
switch (target_mach)
{
case bfd_mach_score7:
set_gdbarch_breakpoint_kind_from_pc (gdbarch,
score7_breakpoint_kind_from_pc);
set_gdbarch_sw_breakpoint_from_kind (gdbarch,
score7_sw_breakpoint_from_kind);
set_gdbarch_skip_prologue (gdbarch, score7_skip_prologue);
set_gdbarch_stack_frame_destroyed_p (gdbarch,
score7_stack_frame_destroyed_p);
set_gdbarch_register_name (gdbarch, score7_register_name);
set_gdbarch_num_regs (gdbarch, SCORE7_NUM_REGS);
/* Core file support. */
set_gdbarch_iterate_over_regset_sections
(gdbarch, score7_linux_iterate_over_regset_sections);
break;
case bfd_mach_score3:
set_gdbarch_breakpoint_kind_from_pc (gdbarch,
score3_breakpoint_kind_from_pc);
set_gdbarch_sw_breakpoint_from_kind (gdbarch,
score3_sw_breakpoint_from_kind);
set_gdbarch_skip_prologue (gdbarch, score3_skip_prologue);
set_gdbarch_stack_frame_destroyed_p (gdbarch,
score3_stack_frame_destroyed_p);
set_gdbarch_register_name (gdbarch, score3_register_name);
set_gdbarch_num_regs (gdbarch, SCORE3_NUM_REGS);
break;
}
/* Watchpoint hooks. */
set_gdbarch_have_nonsteppable_watchpoint (gdbarch, 1);
/* Dummy frame hooks. */
set_gdbarch_return_value (gdbarch, score_return_value);
set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT);
set_gdbarch_push_dummy_call (gdbarch, score_push_dummy_call);
/* Normal frame hooks. */
dwarf2_append_unwinders (gdbarch);
frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer);
frame_unwind_append_unwinder (gdbarch, &score_prologue_unwind);
frame_base_append_sniffer (gdbarch, score_prologue_frame_base_sniffer);
return gdbarch;
}
void _initialize_score_tdep ();
void
_initialize_score_tdep ()
{
gdbarch_register (bfd_arch_score, score_gdbarch_init, NULL);
}
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