/* Target-dependent code for Xilinx MicroBlaze.
- Copyright 2009 Free Software Foundation, Inc.
+ Copyright 2009-2012 Free Software Foundation, Inc.
This file is part of GDB.
This set also needs to be verified if it is complete. */
#define IS_RETURN(op) (op == rtsd || op == rtid)
#define IS_UPDATE_SP(op, rd, ra) \
- ((op == addik || op == addi) && rd == REG_SP && ra == REG_SP)
+ ((op == addik || op == addi) && rd == REG_SP && ra == REG_SP)
#define IS_SPILL_SP(op, rd, ra) \
- ((op == swi || op == sw) && rd == REG_SP && ra == REG_SP)
+ ((op == swi || op == sw) && rd == REG_SP && ra == REG_SP)
#define IS_SPILL_REG(op, rd, ra) \
- ((op == swi || op == sw) && rd != REG_SP && ra == REG_SP)
+ ((op == swi || op == sw) && rd != REG_SP && ra == REG_SP)
#define IS_ALSO_SPILL_REG(op, rd, ra, rb) \
- ((op == swi || op == sw) && rd != REG_SP && ra == 0 && rb == REG_SP)
+ ((op == swi || op == sw) && rd != REG_SP && ra == 0 && rb == REG_SP)
#define IS_SETUP_FP(op, ra, rb) \
- ((op == add || op == addik || op == addk) && ra == REG_SP && rb == 0)
+ ((op == add || op == addik || op == addk) && ra == REG_SP && rb == 0)
#define IS_SPILL_REG_FP(op, rd, ra, fpregnum) \
- ((op == swi || op == sw) && rd != REG_SP && ra == fpregnum && ra != 0)
+ ((op == swi || op == sw) && rd != REG_SP && ra == fpregnum && ra != 0)
#define IS_SAVE_HIDDEN_PTR(op, rd, ra, rb) \
- ((op == add || op == addik) && ra == MICROBLAZE_FIRST_ARGREG && rb == 0)
-
-/* All registers are 32 bits. */
-#define MICROBLAZE_REGISTER_SIZE 4
+ ((op == add || op == addik) && ra == MICROBLAZE_FIRST_ARGREG && rb == 0)
/* The registers of the Xilinx microblaze processor. */
\f
static int microblaze_debug_flag = 0;
-void
+static void
microblaze_debug (const char *fmt, ...)
{
if (microblaze_debug_flag)
\f
/* Fetch the instruction at PC. */
-unsigned long
+static unsigned long
microblaze_fetch_instruction (CORE_ADDR pc)
{
enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
microblaze_alloc_frame_cache (void)
{
struct microblaze_frame_cache *cache;
- int i;
cache = FRAME_OBSTACK_ZALLOC (struct microblaze_frame_cache);
/* Analyze the prologue to determine where registers are saved,
the end of the prologue, etc. Return the address of the first line
- of "real" code (i.e., the end of the prologue). */
+ of "real" code (i.e., the end of the prologue). */
static CORE_ADDR
microblaze_analyze_prologue (struct gdbarch *gdbarch, CORE_ADDR pc,
CORE_ADDR current_pc,
struct microblaze_frame_cache *cache)
{
- char *name;
+ const char *name;
CORE_ADDR func_addr, func_end, addr, stop, prologue_end_addr = 0;
unsigned long insn;
- int rn, rd, ra, rb, imm;
+ int rd, ra, rb, imm;
enum microblaze_instr op;
int flags = 0;
int save_hidden_pointer_found = 0;
int non_stack_instruction_found = 0;
- /* Find the start of this function. */
+ /* Find the start of this function. */
find_pc_partial_function (pc, &name, &func_addr, &func_end);
if (func_addr < pc)
pc = func_addr;
If we're about to return, our frame has already been deallocated.
If we are stopped at the first instruction of a prologue,
- then our frame has not yet been set up. */
+ then our frame has not yet been set up. */
/* Get the first insn from memory. */
else if (IS_SETUP_FP(op, ra, rb))
{
/* We have a frame pointer. Note the register which is
- acting as the frame pointer. */
+ acting as the frame pointer. */
flags |= MICROBLAZE_MY_FRAME_IN_FP;
flags &= ~MICROBLAZE_MY_FRAME_IN_SP;
cache->fp_regnum = rd;
/* When optimizations are enabled, it is not guaranteed that prologue
instructions are not mixed in with other instructions from the
- program. Some programs show this behavior at -O2. This can be
+ program. Some programs show this behavior at -O2. This can be
avoided by adding -fno-schedule-insns2 switch as of now (edk 8.1)
In such cases, we scan the function until we see the first control
instruction. */
continue; /* continue if imm. */
}
- /* This is not a prologue insn, so stop here. */
+ /* This is not a prologue insn, so stop here. */
microblaze_debug ("insn is not a prologue insn -- ending scan\n");
break;
}
/* Return PC of first real instruction of the function starting at
START_PC. */
-CORE_ADDR
+static CORE_ADDR
microblaze_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR start_pc)
{
struct symtab_and_line sal;
/* Normal frames. */
-struct microblaze_frame_cache *
+static struct microblaze_frame_cache *
microblaze_frame_cache (struct frame_info *next_frame, void **this_cache)
{
struct microblaze_frame_cache *cache;
struct gdbarch *gdbarch = get_frame_arch (next_frame);
- CORE_ADDR func, pc, fp;
+ CORE_ADDR func;
int rn;
if (*this_cache)
regnum = 15;
if (regnum == MICROBLAZE_SP_REGNUM)
regnum = 1;
- return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
+ return trad_frame_get_prev_register (this_frame,
+ cache->saved_regs, regnum);
}
else
return trad_frame_get_prev_register (this_frame, cache->saved_regs,
static const struct frame_unwind microblaze_frame_unwind =
{
NORMAL_FRAME,
+ default_frame_unwind_stop_reason,
microblaze_frame_this_id,
microblaze_frame_prev_register,
NULL,
};
\f
static CORE_ADDR
-microblaze_frame_base_address (struct frame_info *next_frame, void **this_cache)
+microblaze_frame_base_address (struct frame_info *next_frame,
+ void **this_cache)
{
struct microblaze_frame_cache *cache =
microblaze_frame_cache (next_frame, this_cache);
memcpy(valbuf, buf + MICROBLAZE_REGISTER_SIZE - 1, 1);
return;
case 2: /* return last 2 bytes in register. */
+ regcache_cooked_read (regcache, MICROBLAZE_RETVAL_REGNUM, buf);
memcpy(valbuf, buf + MICROBLAZE_REGISTER_SIZE - 2, 2);
return;
case 4: /* for sizes 4 or 8, copy the required length. */
Longs are stored in r3 (most significant word) and r4 (least
significant word).
- Small structures are always returned on stack.
-*/
+ Small structures are always returned on stack. */
static void
microblaze_store_return_value (struct type *type, struct regcache *regcache,
}
static enum return_value_convention
-microblaze_return_value (struct gdbarch *gdbarch, struct type *func_type,
+microblaze_return_value (struct gdbarch *gdbarch, struct value *function,
struct type *type, struct regcache *regcache,
gdb_byte *readbuf, const gdb_byte *writebuf)
{
/* Hook in ABI-specific overrides, if they have been registered. */
gdbarch_init_osabi (info, gdbarch);
- /* Unwind the frame. */
+ /* Unwind the frame. */
dwarf2_append_unwinders (gdbarch);
frame_unwind_append_unwinder (gdbarch, µblaze_frame_unwind);
frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer);
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