/* Target-dependent code for the Toshiba MeP for GDB, the GNU debugger.
- Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
- Free Software Foundation, Inc.
+ Copyright (C) 2001-2013 Free Software Foundation, Inc.
Contributed by Red Hat, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "frame.h"
#include "elf-bfd.h"
#include "elf/mep.h"
#include "prologue-value.h"
-#include "opcode/cgen-bitset.h"
+#include "cgen/bitset.h"
#include "infcall.h"
#include "gdb_assert.h"
mask contains any of the me_module's coprocessor ISAs,
specifically excluding the generic coprocessor register sets. */
- CGEN_CPU_DESC desc = gdbarch_tdep (current_gdbarch)->cpu_desc;
+ CGEN_CPU_DESC desc = gdbarch_tdep (target_gdbarch ())->cpu_desc;
const CGEN_HW_ENTRY *hw;
if (me_module == CONFIG_NONE)
static int
-mep_debug_reg_to_regnum (int debug_reg)
+mep_debug_reg_to_regnum (struct gdbarch *gdbarch, int debug_reg)
{
/* The debug info uses the raw register numbers. */
return mep_raw_to_pseudo[debug_reg];
|| IS_FP_CR64_REGNUM (pseudo))
return 64;
else
- gdb_assert (0);
+ gdb_assert_not_reached ("unexpected coprocessor pseudo register");
}
else if (IS_FP_CR64_REGNUM (pseudo))
return pseudo - MEP_FIRST_FP_CR64_REGNUM;
else
- gdb_assert (0);
+ gdb_assert_not_reached ("unexpected coprocessor pseudo register");
}
from the ELF header's e_flags field of the current executable
file. */
static CONFIG_ATTR
-current_me_module ()
+current_me_module (void)
{
if (target_has_registers)
{
ULONGEST regval;
- regcache_cooked_read_unsigned (current_regcache,
+ regcache_cooked_read_unsigned (get_current_regcache (),
MEP_MODULE_REGNUM, ®val);
return regval;
}
else
- return gdbarch_tdep (current_gdbarch)->me_module;
+ return gdbarch_tdep (target_gdbarch ())->me_module;
}
then use the 'module_opt' field we computed when we build the
gdbarch object for this module. */
static unsigned int
-current_options ()
+current_options (void)
{
if (target_has_registers)
{
ULONGEST regval;
- regcache_cooked_read_unsigned (current_regcache,
+ regcache_cooked_read_unsigned (get_current_regcache (),
MEP_OPT_REGNUM, ®val);
return regval;
}
/* Return the width of the current me_module's coprocessor data bus,
in bits. This is either 32 or 64. */
static int
-current_cop_data_bus_width ()
+current_cop_data_bus_width (void)
{
return me_module_cop_data_bus_width (current_me_module ());
}
/* Return the keyword table of coprocessor general-purpose register
names appropriate for the me_module we're dealing with. */
static CGEN_KEYWORD *
-current_cr_names ()
+current_cr_names (void)
{
const CGEN_HW_ENTRY *hw
= me_module_register_set (current_me_module (), "h-cr-", HW_H_CR);
/* Return non-zero if the coprocessor general-purpose registers are
floating-point values, zero otherwise. */
static int
-current_cr_is_float ()
+current_cr_is_float (void)
{
const CGEN_HW_ENTRY *hw
= me_module_register_set (current_me_module (), "h-cr-", HW_H_CR);
/* Return the keyword table of coprocessor control register names
appropriate for the me_module we're dealing with. */
static CGEN_KEYWORD *
-current_ccr_names ()
+current_ccr_names (void)
{
const CGEN_HW_ENTRY *hw
= me_module_register_set (current_me_module (), "h-ccr-", HW_H_CCR);
static const char *
-mep_register_name (int regnr)
+mep_register_name (struct gdbarch *gdbarch, int regnr)
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
/* General-purpose registers. */
static const char *gpr_names[] = {
{
/* Filter reserved or unused register numbers. */
{
- const char *name = mep_register_name (regnum);
+ const char *name = mep_register_name (gdbarch, regnum);
if (! name || name[0] == '\0')
return 0;
keep the 'g' packet format fixed), and the pseudoregisters vary
in length. */
if (IS_RAW_CR_REGNUM (reg_nr))
- return builtin_type_uint64;
+ return builtin_type (gdbarch)->builtin_uint64;
/* Since GDB doesn't allow registers to change type, we have two
banks of pseudoregisters for the coprocessor general-purpose
if (size == 32)
{
if (mep_pseudo_cr_is_float (reg_nr))
- return builtin_type_float;
+ return builtin_type (gdbarch)->builtin_float;
else
- return builtin_type_uint32;
+ return builtin_type (gdbarch)->builtin_uint32;
}
else if (size == 64)
{
if (mep_pseudo_cr_is_float (reg_nr))
- return builtin_type_double;
+ return builtin_type (gdbarch)->builtin_double;
else
- return builtin_type_uint64;
+ return builtin_type (gdbarch)->builtin_uint64;
}
else
- gdb_assert (0);
+ gdb_assert_not_reached ("unexpected cr size");
}
/* All other registers are 32 bits long. */
else
- return builtin_type_uint32;
+ return builtin_type (gdbarch)->builtin_uint32;
}
}
-static void
+static enum register_status
mep_pseudo_cr32_read (struct gdbarch *gdbarch,
struct regcache *regcache,
int cookednum,
void *buf)
{
+ enum register_status status;
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
/* Read the raw register into a 64-bit buffer, and then return the
appropriate end of that buffer. */
int rawnum = mep_pseudo_to_raw[cookednum];
gdb_assert (TYPE_LENGTH (register_type (gdbarch, rawnum)) == sizeof (buf64));
gdb_assert (TYPE_LENGTH (register_type (gdbarch, cookednum)) == 4);
- regcache_raw_read (regcache, rawnum, buf64);
- /* Slow, but legible. */
- store_unsigned_integer (buf, 4, extract_unsigned_integer (buf64, 8));
+ status = regcache_raw_read (regcache, rawnum, buf64);
+ if (status == REG_VALID)
+ {
+ /* Slow, but legible. */
+ store_unsigned_integer (buf, 4, byte_order,
+ extract_unsigned_integer (buf64, 8, byte_order));
+ }
+ return status;
}
-static void
+static enum register_status
mep_pseudo_cr64_read (struct gdbarch *gdbarch,
struct regcache *regcache,
int cookednum,
void *buf)
{
- regcache_raw_read (regcache, mep_pseudo_to_raw[cookednum], buf);
+ return regcache_raw_read (regcache, mep_pseudo_to_raw[cookednum], buf);
}
-static void
+static enum register_status
mep_pseudo_register_read (struct gdbarch *gdbarch,
struct regcache *regcache,
int cookednum,
{
if (IS_CSR_REGNUM (cookednum)
|| IS_CCR_REGNUM (cookednum))
- regcache_raw_read (regcache, mep_pseudo_to_raw[cookednum], buf);
+ return regcache_raw_read (regcache, mep_pseudo_to_raw[cookednum], buf);
else if (IS_CR32_REGNUM (cookednum)
|| IS_FP_CR32_REGNUM (cookednum))
- mep_pseudo_cr32_read (gdbarch, regcache, cookednum, buf);
+ return mep_pseudo_cr32_read (gdbarch, regcache, cookednum, buf);
else if (IS_CR64_REGNUM (cookednum)
|| IS_FP_CR64_REGNUM (cookednum))
- mep_pseudo_cr64_read (gdbarch, regcache, cookednum, buf);
+ return mep_pseudo_cr64_read (gdbarch, regcache, cookednum, buf);
else
- gdb_assert (0);
+ gdb_assert_not_reached ("unexpected pseudo register");
}
int cookednum,
const void *buf)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
int size = register_size (gdbarch, cookednum);
struct mep_csr_register *r
= &mep_csr_registers[cookednum - MEP_FIRST_CSR_REGNUM];
ULONGEST mixed_bits;
regcache_raw_read_unsigned (regcache, r->raw, &old_bits);
- new_bits = extract_unsigned_integer (buf, size);
+ new_bits = extract_unsigned_integer (buf, size, byte_order);
mixed_bits = ((r->writeable_bits & new_bits)
| (~r->writeable_bits & old_bits));
regcache_raw_write_unsigned (regcache, r->raw, mixed_bits);
int cookednum,
const void *buf)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
/* Expand the 32-bit value into a 64-bit value, and write that to
the pseudoregister. */
int rawnum = mep_pseudo_to_raw[cookednum];
gdb_assert (TYPE_LENGTH (register_type (gdbarch, rawnum)) == sizeof (buf64));
gdb_assert (TYPE_LENGTH (register_type (gdbarch, cookednum)) == 4);
/* Slow, but legible. */
- store_unsigned_integer (buf64, 8, extract_unsigned_integer (buf, 4));
+ store_unsigned_integer (buf64, 8, byte_order,
+ extract_unsigned_integer (buf, 4, byte_order));
regcache_raw_write (regcache, rawnum, buf64);
}
else if (IS_CCR_REGNUM (cookednum))
regcache_raw_write (regcache, mep_pseudo_to_raw[cookednum], buf);
else
- gdb_assert (0);
+ gdb_assert_not_reached ("unexpected pseudo register");
}
/* Disassembly. */
/* The mep disassembler needs to know about the section in order to
- work correctly. */
-int
+ work correctly. */
+static int
mep_gdb_print_insn (bfd_vma pc, disassemble_info * info)
{
struct obj_section * s = find_pc_section (pc);
Every bundle is four bytes long, and naturally aligned, and can hold
one or two instructions:
- 16-bit core instruction; 16-bit coprocessor instruction
- These execute in parallel.
+ These execute in parallel.
- 32-bit core instruction
- 32-bit coprocessor instruction
Every bundle is eight bytes long, and naturally aligned, and can hold
one or two instructions:
- 16-bit core instruction; 48-bit (!) coprocessor instruction
- These execute in parallel.
+ These execute in parallel.
- 32-bit core instruction; 32-bit coprocessor instruction
- These execute in parallel.
+ These execute in parallel.
- 64-bit coprocessor instruction
Now, the MeP manual doesn't define any 48- or 64-bit coprocessor
anyway. */
static CORE_ADDR
-mep_get_insn (CORE_ADDR pc, long *insn)
+mep_get_insn (struct gdbarch *gdbarch, CORE_ADDR pc, long *insn)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
int pc_in_vliw_section;
int vliw_mode;
int insn_len;
vliw_mode = 0;
read_memory (pc, buf, sizeof (buf));
- *insn = extract_unsigned_integer (buf, 2) << 16;
+ *insn = extract_unsigned_integer (buf, 2, byte_order) << 16;
/* The major opcode --- the top four bits of the first 16-bit
part --- indicates whether this instruction is 16 or 32 bits
{
/* Fetch the second 16-bit part of the instruction. */
read_memory (pc + 2, buf, sizeof (buf));
- *insn = *insn | extract_unsigned_integer (buf, 2);
+ *insn = *insn | extract_unsigned_integer (buf, 2, byte_order);
}
/* If we're in VLIW code, then the VLIW width determines the address
/* We'd better be in either core, 32-bit VLIW, or 64-bit VLIW mode. */
else
- gdb_assert (0);
+ gdb_assert_not_reached ("unexpected vliw mode");
}
/* Otherwise, the top two bits of the major opcode are (again) what
#define MOV_TARGET(i) (FIELD (i, 24, 4))
#define MOV_SOURCE(i) (FIELD (i, 20, 4))
+/* BRA disp12.align2 1011_dddd_dddd_ddd0 xxxx_xxxx_xxxx_xxxx */
+#define IS_BRA(i) (((i) & 0xf0010000) == 0xb0000000)
+#define BRA_DISP(i) (SFIELD (i, 17, 11) << 1)
+
/* This structure holds the results of a prologue analysis. */
struct mep_prologue
{
+ /* The architecture for which we generated this prologue info. */
+ struct gdbarch *gdbarch;
+
/* The offset from the frame base to the stack pointer --- always
zero or negative.
- ADDR is a stack slot's address (e.g., relative to the original
value of the SP). */
static int
-is_arg_spill (pv_t value, pv_t addr, struct pv_area *stack)
+is_arg_spill (struct gdbarch *gdbarch, pv_t value, pv_t addr,
+ struct pv_area *stack)
{
return (is_arg_reg (value)
&& pv_is_register (addr, MEP_SP_REGNUM)
- && ! pv_area_find_reg (stack, current_gdbarch, value.reg, 0));
+ && ! pv_area_find_reg (stack, gdbarch, value.reg, 0));
}
if (value.kind == pvk_register
&& value.k == 0
&& pv_is_register (addr, MEP_SP_REGNUM)
- && size == register_size (current_gdbarch, value.reg))
+ && size == register_size (result->gdbarch, value.reg))
result->reg_offset[value.reg] = addr.k;
}
/* Analyze a prologue starting at START_PC, going no further than
LIMIT_PC. Fill in RESULT as appropriate. */
static void
-mep_analyze_prologue (CORE_ADDR start_pc, CORE_ADDR limit_pc,
+mep_analyze_prologue (struct gdbarch *gdbarch,
+ CORE_ADDR start_pc, CORE_ADDR limit_pc,
struct mep_prologue *result)
{
CORE_ADDR pc;
CORE_ADDR after_last_frame_setup_insn = start_pc;
memset (result, 0, sizeof (*result));
+ result->gdbarch = gdbarch;
for (rn = 0; rn < MEP_NUM_REGS; rn++)
{
result->reg_offset[rn] = 1;
}
- stack = make_pv_area (MEP_SP_REGNUM);
+ stack = make_pv_area (MEP_SP_REGNUM, gdbarch_addr_bit (gdbarch));
back_to = make_cleanup_free_pv_area (stack);
pc = start_pc;
CORE_ADDR next_pc;
pv_t pre_insn_fp, pre_insn_sp;
- next_pc = mep_get_insn (pc, &insn);
+ next_pc = mep_get_insn (gdbarch, pc, &insn);
/* A zero return from mep_get_insn means that either we weren't
able to read the instruction from memory, or that we don't
if (pv_area_store_would_trash (stack, reg[rm]))
break;
- if (is_arg_spill (reg[rn], reg[rm], stack))
+ if (is_arg_spill (gdbarch, reg[rn], reg[rm], stack))
after_last_frame_setup_insn = next_pc;
pv_area_store (stack, reg[rm], 4, reg[rn]);
if (pv_area_store_would_trash (stack, addr))
break;
- if (is_arg_spill (reg[rn], addr, stack))
+ if (is_arg_spill (gdbarch, reg[rn], addr, stack))
after_last_frame_setup_insn = next_pc;
pv_area_store (stack, addr, 4, reg[rn]);
int disp = SWBH_32_OFFSET (insn);
int size = (IS_SB (insn) ? 1
: IS_SH (insn) ? 2
- : IS_SW (insn) ? 4
- : (gdb_assert (0), 1));
+ : (gdb_assert (IS_SW (insn)), 4));
pv_t addr = pv_add_constant (reg[rm], disp);
if (pv_area_store_would_trash (stack, addr))
break;
- if (is_arg_spill (reg[rn], addr, stack))
+ if (is_arg_spill (gdbarch, reg[rn], addr, stack))
after_last_frame_setup_insn = next_pc;
pv_area_store (stack, addr, size, reg[rn]);
reg[rn] = pv_area_fetch (stack, addr, 4);
}
+ else if (IS_BRA (insn) && BRA_DISP (insn) > 0)
+ {
+ /* When a loop appears as the first statement of a function
+ body, gcc 4.x will use a BRA instruction to branch to the
+ loop condition checking code. This BRA instruction is
+ marked as part of the prologue. We therefore set next_pc
+ to this branch target and also stop the prologue scan.
+ The instructions at and beyond the branch target should
+ no longer be associated with the prologue.
+
+ Note that we only consider forward branches here. We
+ presume that a forward branch is being used to skip over
+ a loop body.
+
+ A backwards branch is covered by the default case below.
+ If we were to encounter a backwards branch, that would
+ most likely mean that we've scanned through a loop body.
+ We definitely want to stop the prologue scan when this
+ happens and that is precisely what is done by the default
+ case below. */
+ next_pc = pc + BRA_DISP (insn);
+ after_last_frame_setup_insn = next_pc;
+ break;
+ }
else
/* We've hit some instruction we don't know how to simulate.
Strictly speaking, we should set every value we're
static CORE_ADDR
-mep_skip_prologue (CORE_ADDR pc)
+mep_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
{
- char *name;
+ const char *name;
CORE_ADDR func_addr, func_end;
struct mep_prologue p;
if (! find_pc_partial_function (pc, &name, &func_addr, &func_end))
return pc;
- mep_analyze_prologue (pc, func_end, &p);
+ mep_analyze_prologue (gdbarch, pc, func_end, &p);
return p.prologue_end;
}
/* Breakpoints. */
static const unsigned char *
-mep_breakpoint_from_pc (CORE_ADDR * pcptr, int *lenptr)
+mep_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR * pcptr, int *lenptr)
{
static unsigned char breakpoint[] = { 0x70, 0x32 };
*lenptr = sizeof (breakpoint);
static struct mep_prologue *
-mep_analyze_frame_prologue (struct frame_info *next_frame,
+mep_analyze_frame_prologue (struct frame_info *this_frame,
void **this_prologue_cache)
{
if (! *this_prologue_cache)
*this_prologue_cache
= FRAME_OBSTACK_ZALLOC (struct mep_prologue);
- func_start = frame_func_unwind (next_frame, NORMAL_FRAME);
- stop_addr = frame_pc_unwind (next_frame);
+ func_start = get_frame_func (this_frame);
+ stop_addr = get_frame_pc (this_frame);
/* If we couldn't find any function containing the PC, then
just initialize the prologue cache, but don't do anything. */
if (! func_start)
stop_addr = func_start;
- mep_analyze_prologue (func_start, stop_addr, *this_prologue_cache);
+ mep_analyze_prologue (get_frame_arch (this_frame),
+ func_start, stop_addr, *this_prologue_cache);
}
return *this_prologue_cache;
/* Given the next frame and a prologue cache, return this frame's
base. */
static CORE_ADDR
-mep_frame_base (struct frame_info *next_frame,
+mep_frame_base (struct frame_info *this_frame,
void **this_prologue_cache)
{
struct mep_prologue *p
- = mep_analyze_frame_prologue (next_frame, this_prologue_cache);
+ = mep_analyze_frame_prologue (this_frame, this_prologue_cache);
/* In functions that use alloca, the distance between the stack
pointer and the frame base varies dynamically, so we can't use
if (p->has_frame_ptr)
{
CORE_ADDR fp
- = frame_unwind_register_unsigned (next_frame, MEP_FP_REGNUM);
+ = get_frame_register_unsigned (this_frame, MEP_FP_REGNUM);
return fp - p->frame_ptr_offset;
}
else
{
CORE_ADDR sp
- = frame_unwind_register_unsigned (next_frame, MEP_SP_REGNUM);
+ = get_frame_register_unsigned (this_frame, MEP_SP_REGNUM);
return sp - p->frame_size;
}
}
static void
-mep_frame_this_id (struct frame_info *next_frame,
+mep_frame_this_id (struct frame_info *this_frame,
void **this_prologue_cache,
struct frame_id *this_id)
{
- *this_id = frame_id_build (mep_frame_base (next_frame, this_prologue_cache),
- frame_func_unwind (next_frame, NORMAL_FRAME));
+ *this_id = frame_id_build (mep_frame_base (this_frame, this_prologue_cache),
+ get_frame_func (this_frame));
}
-static void
-mep_frame_prev_register (struct frame_info *next_frame,
- void **this_prologue_cache,
- int regnum, int *optimizedp,
- enum lval_type *lvalp, CORE_ADDR *addrp,
- int *realnump, gdb_byte *bufferp)
+static struct value *
+mep_frame_prev_register (struct frame_info *this_frame,
+ void **this_prologue_cache, int regnum)
{
struct mep_prologue *p
- = mep_analyze_frame_prologue (next_frame, this_prologue_cache);
+ = mep_analyze_frame_prologue (this_frame, this_prologue_cache);
/* There are a number of complications in unwinding registers on the
MeP, having to do with core functions calling VLIW functions and
do this. */
if (regnum == MEP_PC_REGNUM)
{
- mep_frame_prev_register (next_frame, this_prologue_cache, MEP_LP_REGNUM,
- optimizedp, lvalp, addrp, realnump, bufferp);
- store_unsigned_integer (bufferp, MEP_LP_SIZE,
- (extract_unsigned_integer (bufferp, MEP_LP_SIZE)
- & ~1));
- *lvalp = not_lval;
+ struct value *value;
+ CORE_ADDR lp;
+ value = mep_frame_prev_register (this_frame, this_prologue_cache,
+ MEP_LP_REGNUM);
+ lp = value_as_long (value);
+ release_value (value);
+ value_free (value);
+
+ return frame_unwind_got_constant (this_frame, regnum, lp & ~1);
}
else
{
- CORE_ADDR frame_base = mep_frame_base (next_frame, this_prologue_cache);
- int reg_size = register_size (get_frame_arch (next_frame), regnum);
+ CORE_ADDR frame_base = mep_frame_base (this_frame, this_prologue_cache);
+ struct value *value;
/* Our caller's SP is our frame base. */
if (regnum == MEP_SP_REGNUM)
- {
- *optimizedp = 0;
- *lvalp = not_lval;
- *addrp = 0;
- *realnump = -1;
- if (bufferp)
- store_unsigned_integer (bufferp, reg_size, frame_base);
- }
+ return frame_unwind_got_constant (this_frame, regnum, frame_base);
/* If prologue analysis says we saved this register somewhere,
return a description of the stack slot holding it. */
- else if (p->reg_offset[regnum] != 1)
- {
- *optimizedp = 0;
- *lvalp = lval_memory;
- *addrp = frame_base + p->reg_offset[regnum];
- *realnump = -1;
- if (bufferp)
- get_frame_memory (next_frame, *addrp, bufferp, reg_size);
- }
+ if (p->reg_offset[regnum] != 1)
+ value = frame_unwind_got_memory (this_frame, regnum,
+ frame_base + p->reg_offset[regnum]);
/* Otherwise, presume we haven't changed the value of this
register, and get it from the next frame. */
else
- frame_register_unwind (next_frame, regnum,
- optimizedp, lvalp, addrp, realnump, bufferp);
+ value = frame_unwind_got_register (this_frame, regnum, regnum);
/* If we need to toggle the operating mode, do so. */
if (regnum == MEP_PSW_REGNUM)
{
- int lp_optimized;
- enum lval_type lp_lval;
- CORE_ADDR lp_addr;
- int lp_realnum;
- char lp_buffer[MEP_LP_SIZE];
+ CORE_ADDR psw, lp;
+
+ psw = value_as_long (value);
+ release_value (value);
+ value_free (value);
/* Get the LP's value, too. */
- frame_register_unwind (next_frame, MEP_LP_REGNUM,
- &lp_optimized, &lp_lval, &lp_addr,
- &lp_realnum, lp_buffer);
+ value = get_frame_register_value (this_frame, MEP_LP_REGNUM);
+ lp = value_as_long (value);
+ release_value (value);
+ value_free (value);
/* If LP.LTOM is set, then toggle PSW.OM. */
- if (extract_unsigned_integer (lp_buffer, MEP_LP_SIZE) & 0x1)
- store_unsigned_integer
- (bufferp, MEP_PSW_SIZE,
- (extract_unsigned_integer (bufferp, MEP_PSW_SIZE) ^ 0x1000));
- *lvalp = not_lval;
+ if (lp & 0x1)
+ psw ^= 0x1000;
+
+ return frame_unwind_got_constant (this_frame, regnum, psw);
}
+
+ return value;
}
}
static const struct frame_unwind mep_frame_unwind = {
NORMAL_FRAME,
+ default_frame_unwind_stop_reason,
mep_frame_this_id,
- mep_frame_prev_register
+ mep_frame_prev_register,
+ NULL,
+ default_frame_sniffer
};
-static const struct frame_unwind *
-mep_frame_sniffer (struct frame_info *next_frame)
-{
- return &mep_frame_unwind;
-}
-
-
/* Our general unwinding function can handle unwinding the PC. */
static CORE_ADDR
mep_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
else
offset = 0;
- /* Return values that do fit in a single register are returned in R0. */
+ /* Return values that do fit in a single register are returned in R0. */
regcache_cooked_read_part (regcache, MEP_R0_REGNUM,
offset, TYPE_LENGTH (type),
valbuf);
/* Return values larger than a single register are returned in
memory, pointed to by R0. Unfortunately, we can't count on R0
- pointing to the return buffer, so we raise an error here. */
+ pointing to the return buffer, so we raise an error here. */
else
- error ("GDB cannot set return values larger than four bytes; "
- "the Media Processor's\n"
- "calling conventions do not provide enough information "
- "to do this.\n"
- "Try using the 'return' command with no argument.");
+ error (_("\
+GDB cannot set return values larger than four bytes; the Media Processor's\n\
+calling conventions do not provide enough information to do this.\n\
+Try using the 'return' command with no argument."));
}
-enum return_value_convention
-mep_return_value (struct gdbarch *gdbarch, struct type *type,
- struct regcache *regcache, gdb_byte *readbuf,
- const gdb_byte *writebuf)
+static enum return_value_convention
+mep_return_value (struct gdbarch *gdbarch, struct value *function,
+ struct type *type, struct regcache *regcache,
+ gdb_byte *readbuf, const gdb_byte *writebuf)
{
if (mep_use_struct_convention (type))
{
{
/* Return values larger than a single register are returned in
memory, pointed to by R0. Unfortunately, we can't count on R0
- pointing to the return buffer, so we raise an error here. */
- error ("GDB cannot set return values larger than four bytes; "
- "the Media Processor's\n"
- "calling conventions do not provide enough information "
- "to do this.\n"
- "Try using the 'return' command with no argument.");
+ pointing to the return buffer, so we raise an error here. */
+ error (_("\
+GDB cannot set return values larger than four bytes; the Media Processor's\n\
+calling conventions do not provide enough information to do this.\n\
+Try using the 'return' command with no argument."));
}
return RETURN_VALUE_ABI_RETURNS_ADDRESS;
}
4.2.1 Core register conventions
- Parameters should be evaluated from left to right, and they
- should be held in $1,$2,$3,$4 in order. The fifth parameter or
- after should be held in the stack. If the size is larger than 4
+ should be held in $1,$2,$3,$4 in order. The fifth parameter or
+ after should be held in the stack. If the size is larger than 4
bytes in the first four parameters, the pointer should be held in
- the registers instead. If the size is larger than 4 bytes in the
+ the registers instead. If the size is larger than 4 bytes in the
fifth parameter or after, the pointer should be held in the stack.
- - Return value of a function should be held in register $0. If the
+ - Return value of a function should be held in register $0. If the
size of return value is larger than 4 bytes, $1 should hold the
- pointer pointing memory that would hold the return value. In this
+ pointer pointing memory that would hold the return value. In this
case, the first parameter should be held in $2, the second one in
$3, and the third one in $4, and the forth parameter or after
should be held in the stack.
int struct_return,
CORE_ADDR struct_addr)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
CORE_ADDR *copy = (CORE_ADDR *) alloca (argc * sizeof (copy[0]));
CORE_ADDR func_addr = find_function_addr (function, NULL);
int i;
for (i = 0; i < argc; i++)
{
- unsigned arg_size = TYPE_LENGTH (value_type (argv[i]));
ULONGEST value;
/* Arguments that fit in a GPR get expanded to fill the GPR. */
- if (arg_size <= MEP_GPR_SIZE)
+ if (TYPE_LENGTH (value_type (argv[i])) <= MEP_GPR_SIZE)
value = extract_unsigned_integer (value_contents (argv[i]),
- TYPE_LENGTH (value_type (argv[i])));
+ TYPE_LENGTH (value_type (argv[i])),
+ byte_order);
/* Arguments too large to fit in a GPR get copied to the stack,
and we pass a pointer to the copy. */
else
{
char buf[MEP_GPR_SIZE];
- store_unsigned_integer (buf, MEP_GPR_SIZE, value);
+ store_unsigned_integer (buf, MEP_GPR_SIZE, byte_order, value);
write_memory (arg_stack, buf, MEP_GPR_SIZE);
arg_stack += MEP_GPR_SIZE;
}
static struct frame_id
-mep_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame)
+mep_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
{
- return frame_id_build (mep_unwind_sp (gdbarch, next_frame),
- frame_pc_unwind (next_frame));
+ CORE_ADDR sp = get_frame_register_unsigned (this_frame, MEP_SP_REGNUM);
+ return frame_id_build (sp, get_frame_pc (this_frame));
}
fputc_unfiltered ('\n', gdb_stderr);
if (module_name)
- warning ("the MeP module '%s' is %s-endian, but the executable\n"
- "%s is %s-endian.",
+ warning (_("the MeP module '%s' is %s-endian, but the executable\n"
+ "%s is %s-endian."),
module_name, module_endianness,
file_name, file_endianness);
else
- warning ("the selected MeP module is %s-endian, but the "
- "executable\n"
- "%s is %s-endian.",
+ warning (_("the selected MeP module is %s-endian, but the "
+ "executable\n"
+ "%s is %s-endian."),
module_endianness, file_name, file_endianness);
}
}
set_gdbarch_skip_prologue (gdbarch, mep_skip_prologue);
/* Frames and frame unwinding. */
- frame_unwind_append_sniffer (gdbarch, mep_frame_sniffer);
+ frame_unwind_append_unwinder (gdbarch, &mep_frame_unwind);
set_gdbarch_unwind_pc (gdbarch, mep_unwind_pc);
set_gdbarch_unwind_sp (gdbarch, mep_unwind_sp);
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
/* Inferior function calls. */
set_gdbarch_frame_align (gdbarch, mep_frame_align);
set_gdbarch_push_dummy_call (gdbarch, mep_push_dummy_call);
- set_gdbarch_unwind_dummy_id (gdbarch, mep_unwind_dummy_id);
+ set_gdbarch_dummy_id (gdbarch, mep_dummy_id);
return gdbarch;
}
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern initialize_file_ftype _initialize_mep_tdep;
void
_initialize_mep_tdep (void)
projects / deliverable / binutils-gdb.git / blobdiff