#include <ctype.h>
#include "defs.h"
#include "frame.h"
#include "inferior.h"
#include "gdbcmd.h"
#include "gdbcore.h"
#include "gdb_string.h"
#include "dis-asm.h"
#include "regcache.h"
#include "doublest.h"
#include "value.h"
#include "arch-utils.h"
#include "osabi.h"
#include "frame-unwind.h"
#include "frame-base.h"
#include "trad-frame.h"
#include "objfiles.h"
#include "dwarf2-frame.h"
#include "arm-tdep.h"
#include "gdb/sim-arm.h"
#include "elf-bfd.h"
#include "coff/internal.h"
#include "elf/arm.h"
#include "gdb_assert.h"
static int arm_debug;
#ifdef SIGCONTEXT_REGISTER_ADDRESS
#ifndef SIGCONTEXT_REGISTER_ADDRESS_P
#define SIGCONTEXT_REGISTER_ADDRESS_P() 1
#endif
#else
#define SIGCONTEXT_REGISTER_ADDRESS(SP,PC,REG) 0
#define SIGCONTEXT_REGISTER_ADDRESS_P() 0
#endif
#define MSYMBOL_SET_SPECIAL(msym) \
MSYMBOL_INFO (msym) = (char *) (((long) MSYMBOL_INFO (msym)) \
| 0x80000000)
#define MSYMBOL_IS_SPECIAL(msym) \
(((long) MSYMBOL_INFO (msym) & 0x80000000) != 0)
static struct cmd_list_element *setarmcmdlist = NULL;
static struct cmd_list_element *showarmcmdlist = NULL;
static const char *fp_model_strings[] =
{
"auto",
"softfpa",
"fpa",
"softvfp",
"vfp",
NULL
};
static enum arm_float_model arm_fp_model = ARM_FLOAT_AUTO;
static const char *current_fp_model = "auto";
static const char *arm_abi_strings[] =
{
"auto",
"APCS",
"AAPCS",
NULL
};
static enum arm_abi_kind arm_abi_global = ARM_ABI_AUTO;
static const char *arm_abi_string = "auto";
static int num_disassembly_options;
static char * arm_register_name_strings[] =
{"r0", "r1", "r2", "r3",
"r4", "r5", "r6", "r7",
"r8", "r9", "r10", "r11",
"r12", "sp", "lr", "pc",
"f0", "f1", "f2", "f3",
"f4", "f5", "f6", "f7",
"fps", "cpsr" };
static char **arm_register_names = arm_register_name_strings;
static const char **valid_disassembly_styles;
static const char *disassembly_style;
static int current_option;
static void set_disassembly_style_sfunc(char *, int,
struct cmd_list_element *);
static void set_disassembly_style (void);
static void convert_from_extended (const struct floatformat *, const void *,
void *);
static void convert_to_extended (const struct floatformat *, void *,
const void *);
struct arm_prologue_cache
{
CORE_ADDR prev_sp;
int framesize;
int frameoffset;
int framereg;
struct trad_frame_saved_reg *saved_regs;
};
#define IS_THUMB_ADDR(addr) ((addr) & 1)
#define MAKE_THUMB_ADDR(addr) ((addr) | 1)
#define UNMAKE_THUMB_ADDR(addr) ((addr) & ~1)
int arm_apcs_32 = 1;
int
arm_pc_is_thumb (CORE_ADDR memaddr)
{
struct minimal_symbol *sym;
if (IS_THUMB_ADDR (memaddr))
return 1;
sym = lookup_minimal_symbol_by_pc (memaddr);
if (sym)
{
return (MSYMBOL_IS_SPECIAL (sym));
}
else
{
return 0;
}
}
static CORE_ADDR
arm_addr_bits_remove (CORE_ADDR val)
{
if (arm_apcs_32)
return (val & (arm_pc_is_thumb (val) ? 0xfffffffe : 0xfffffffc));
else
return (val & 0x03fffffc);
}
static CORE_ADDR
arm_smash_text_address (CORE_ADDR val)
{
return val & ~1;
}
static CORE_ADDR
arm_saved_pc_after_call (struct frame_info *frame)
{
return ADDR_BITS_REMOVE (read_register (ARM_LR_REGNUM));
}
static CORE_ADDR
thumb_skip_prologue (CORE_ADDR pc, CORE_ADDR func_end)
{
CORE_ADDR current_pc;
int findmask = 0;
for (current_pc = pc;
current_pc + 2 < func_end && current_pc < pc + 40;
current_pc += 2)
{
unsigned short insn = read_memory_unsigned_integer (current_pc, 2);
if ((insn & 0xfe00) == 0xb400)
{
findmask |= 1;
}
else if ((insn & 0xff00) == 0xb000)
{
if ((findmask & 1) == 0)
continue;
else
findmask |= 4;
}
else if ((insn & 0xff00) == 0xaf00)
{
findmask |= 2;
}
else if (insn == 0x466f)
{
findmask |= 2;
}
else if (findmask == (4+2+1))
{
break;
}
else
continue;
}
return current_pc;
}
static CORE_ADDR
arm_skip_prologue (CORE_ADDR pc)
{
unsigned long inst;
CORE_ADDR skip_pc;
CORE_ADDR func_addr, func_end = 0;
char *func_name;
struct symtab_and_line sal;
if (deprecated_pc_in_call_dummy (pc))
return pc;
if (find_pc_partial_function (pc, &func_name, &func_addr, &func_end))
{
struct symbol *sym;
sym = lookup_symbol (func_name, NULL, VAR_DOMAIN, NULL, NULL);
if (sym && SYMBOL_LANGUAGE (sym) != language_asm)
{
sal = find_pc_line (func_addr, 0);
if ((sal.line != 0) && (sal.end < func_end))
return sal.end;
}
}
if (arm_pc_is_thumb (pc))
return thumb_skip_prologue (pc, func_end);
if (func_end == 0 || func_end > pc + 64)
func_end = pc + 64;
for (skip_pc = pc; skip_pc < func_end; skip_pc += 4)
{
inst = read_memory_integer (skip_pc, 4);
if (inst == 0xe1a0c00d)
continue;
if ((inst & 0xfffff000) == 0xe28dc000)
continue;
if ((inst & 0xfffff000) == 0xe24dc000)
continue;
if (inst == 0xe52de004)
continue;
if ((inst & 0xfffffff0) == 0xe92d0000)
continue;
if ((inst & 0xfffff800) == 0xe92dd800)
continue;
if ((inst & 0xffbf0fff) == 0xec2d0200)
continue;
if ((inst & 0xffff8fff) == 0xed6d0103)
continue;
if ((inst & 0xfffff000) == 0xe24cb000)
continue;
if ((inst & 0xfffff000) == 0xe24dd000)
continue;
if ((inst & 0xffffc000) == 0xe54b0000 ||
(inst & 0xffffc0f0) == 0xe14b00b0 ||
(inst & 0xffffc000) == 0xe50b0000)
continue;
if ((inst & 0xffffc000) == 0xe5cd0000 ||
(inst & 0xffffc0f0) == 0xe1cd00b0 ||
(inst & 0xffffc000) == 0xe58d0000)
continue;
break;
}
return skip_pc;
}
static void
thumb_scan_prologue (CORE_ADDR prev_pc, struct arm_prologue_cache *cache)
{
CORE_ADDR prologue_start;
CORE_ADDR prologue_end;
CORE_ADDR current_pc;
int saved_reg[16];
int findmask = 0;
int i;
if (find_pc_partial_function (prev_pc, NULL, &prologue_start, &prologue_end))
{
struct symtab_and_line sal = find_pc_line (prologue_start, 0);
if (sal.line == 0)
prologue_end = prev_pc;
else if (sal.end < prologue_end)
prologue_end = sal.end;
}
else
prologue_end = prologue_start + 40;
prologue_end = min (prologue_end, prev_pc);
for (i = 0; i < 16; i++)
saved_reg[i] = i;
cache->framesize = 0;
for (current_pc = prologue_start;
(current_pc < prologue_end) && ((findmask & 7) != 7);
current_pc += 2)
{
unsigned short insn;
int regno;
int offset;
insn = read_memory_unsigned_integer (current_pc, 2);
if ((insn & 0xfe00) == 0xb400)
{
int mask;
findmask |= 1;
mask = (insn & 0xff) | ((insn & 0x100) << 6);
for (regno = ARM_LR_REGNUM; regno >= 0; regno--)
if (mask & (1 << regno))
{
cache->framesize += 4;
cache->saved_regs[saved_reg[regno]].addr = -cache->framesize;
saved_reg[regno] = regno;
}
}
else if ((insn & 0xff00) == 0xb000)
{
if ((findmask & 1) == 0)
continue;
else
findmask |= 4;
offset = (insn & 0x7f) << 2;
if (insn & 0x80)
{
cache->frameoffset += offset;
offset = -offset;
}
cache->framesize -= offset;
}
else if ((insn & 0xff00) == 0xaf00)
{
findmask |= 2;
cache->framereg = THUMB_FP_REGNUM;
cache->frameoffset = (insn & 0xff) << 2;
}
else if (insn == 0x466f)
{
findmask |= 2;
cache->framereg = THUMB_FP_REGNUM;
cache->frameoffset = 0;
saved_reg[THUMB_FP_REGNUM] = ARM_SP_REGNUM;
}
else if ((insn & 0xffc0) == 0x4640)
{
int lo_reg = insn & 7;
int hi_reg = ((insn >> 3) & 7) + 8;
saved_reg[lo_reg] = hi_reg;
}
else
continue;
}
}
static void
arm_scan_prologue (struct frame_info *next_frame, struct arm_prologue_cache *cache)
{
int regno, sp_offset, fp_offset, ip_offset;
CORE_ADDR prologue_start, prologue_end, current_pc;
CORE_ADDR prev_pc = frame_pc_unwind (next_frame);
cache->framereg = ARM_SP_REGNUM;
cache->framesize = 0;
cache->frameoffset = 0;
if (arm_pc_is_thumb (prev_pc))
{
thumb_scan_prologue (prev_pc, cache);
return;
}
if (find_pc_partial_function (prev_pc, NULL, &prologue_start, &prologue_end))
{
if (prologue_end > prologue_start + 64)
{
prologue_end = prologue_start + 64;
}
}
else
{
CORE_ADDR frame_loc;
LONGEST return_value;
frame_loc = frame_unwind_register_unsigned (next_frame, ARM_FP_REGNUM);
if (!safe_read_memory_integer (frame_loc, 4, &return_value))
return;
else
{
prologue_start = ADDR_BITS_REMOVE (return_value) - 8;
prologue_end = prologue_start + 64;
}
}
if (prev_pc < prologue_end)
prologue_end = prev_pc;
sp_offset = fp_offset = ip_offset = 0;
for (current_pc = prologue_start;
current_pc < prologue_end;
current_pc += 4)
{
unsigned int insn = read_memory_unsigned_integer (current_pc, 4);
if (insn == 0xe1a0c00d)
{
ip_offset = 0;
continue;
}
else if ((insn & 0xfffff000) == 0xe28dc000)
{
unsigned imm = insn & 0xff;
unsigned rot = (insn & 0xf00) >> 7;
imm = (imm >> rot) | (imm << (32 - rot));
ip_offset = imm;
continue;
}
else if ((insn & 0xfffff000) == 0xe24dc000)
{
unsigned imm = insn & 0xff;
unsigned rot = (insn & 0xf00) >> 7;
imm = (imm >> rot) | (imm << (32 - rot));
ip_offset = -imm;
continue;
}
else if (insn == 0xe52de004)
{
sp_offset -= 4;
cache->saved_regs[ARM_LR_REGNUM].addr = sp_offset;
continue;
}
else if ((insn & 0xffff0000) == 0xe92d0000)
{
int mask = insn & 0xffff;
for (regno = ARM_PC_REGNUM; regno >= 0; regno--)
if (mask & (1 << regno))
{
sp_offset -= 4;
cache->saved_regs[regno].addr = sp_offset;
}
}
else if ((insn & 0xffffc000) == 0xe54b0000 ||
(insn & 0xffffc0f0) == 0xe14b00b0 ||
(insn & 0xffffc000) == 0xe50b0000)
{
continue;
}
else if ((insn & 0xffffc000) == 0xe5cd0000 ||
(insn & 0xffffc0f0) == 0xe1cd00b0 ||
(insn & 0xffffc000) == 0xe58d0000)
{
continue;
}
else if ((insn & 0xfffff000) == 0xe24cb000)
{
unsigned imm = insn & 0xff;
unsigned rot = (insn & 0xf00) >> 7;
imm = (imm >> rot) | (imm << (32 - rot));
fp_offset = -imm + ip_offset;
cache->framereg = ARM_FP_REGNUM;
}
else if ((insn & 0xfffff000) == 0xe24dd000)
{
unsigned imm = insn & 0xff;
unsigned rot = (insn & 0xf00) >> 7;
imm = (imm >> rot) | (imm << (32 - rot));
sp_offset -= imm;
}
else if ((insn & 0xffff7fff) == 0xed6d0103)
{
sp_offset -= 12;
regno = ARM_F0_REGNUM + ((insn >> 12) & 0x07);
cache->saved_regs[regno].addr = sp_offset;
}
else if ((insn & 0xffbf0fff) == 0xec2d0200)
{
int n_saved_fp_regs;
unsigned int fp_start_reg, fp_bound_reg;
if ((insn & 0x800) == 0x800)
{
if ((insn & 0x40000) == 0x40000)
n_saved_fp_regs = 3;
else
n_saved_fp_regs = 1;
}
else
{
if ((insn & 0x40000) == 0x40000)
n_saved_fp_regs = 2;
else
n_saved_fp_regs = 4;
}
fp_start_reg = ARM_F0_REGNUM + ((insn >> 12) & 0x7);
fp_bound_reg = fp_start_reg + n_saved_fp_regs;
for (; fp_start_reg < fp_bound_reg; fp_start_reg++)
{
sp_offset -= 12;
cache->saved_regs[fp_start_reg++].addr = sp_offset;
}
}
else if ((insn & 0xf0000000) != 0xe0000000)
break;
else if ((insn & 0xfe200000) == 0xe8200000)
break;
else
continue;
}
cache->framesize = -sp_offset;
if (cache->framereg == ARM_FP_REGNUM)
cache->frameoffset = fp_offset - sp_offset;
else
cache->frameoffset = 0;
}
static struct arm_prologue_cache *
arm_make_prologue_cache (struct frame_info *next_frame)
{
int reg;
struct arm_prologue_cache *cache;
CORE_ADDR unwound_fp;
cache = frame_obstack_zalloc (sizeof (struct arm_prologue_cache));
cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
arm_scan_prologue (next_frame, cache);
unwound_fp = frame_unwind_register_unsigned (next_frame, cache->framereg);
if (unwound_fp == 0)
return cache;
cache->prev_sp = unwound_fp + cache->framesize - cache->frameoffset;
for (reg = 0; reg < NUM_REGS; reg++)
if (trad_frame_addr_p (cache->saved_regs, reg))
cache->saved_regs[reg].addr += cache->prev_sp;
return cache;
}
static void
arm_prologue_this_id (struct frame_info *next_frame,
void **this_cache,
struct frame_id *this_id)
{
struct arm_prologue_cache *cache;
struct frame_id id;
CORE_ADDR func;
if (*this_cache == NULL)
*this_cache = arm_make_prologue_cache (next_frame);
cache = *this_cache;
func = frame_func_unwind (next_frame);
if (func <= LOWEST_PC)
return;
if (cache->prev_sp == 0)
return;
id = frame_id_build (cache->prev_sp, func);
*this_id = id;
}
static void
arm_prologue_prev_register (struct frame_info *next_frame,
void **this_cache,
int prev_regnum,
int *optimized,
enum lval_type *lvalp,
CORE_ADDR *addrp,
int *realnump,
gdb_byte *valuep)
{
struct arm_prologue_cache *cache;
if (*this_cache == NULL)
*this_cache = arm_make_prologue_cache (next_frame);
cache = *this_cache;
if (prev_regnum == ARM_PC_REGNUM)
prev_regnum = ARM_LR_REGNUM;
if (prev_regnum == ARM_SP_REGNUM)
{
*lvalp = not_lval;
if (valuep)
store_unsigned_integer (valuep, 4, cache->prev_sp);
return;
}
trad_frame_get_prev_register (next_frame, cache->saved_regs, prev_regnum,
optimized, lvalp, addrp, realnump, valuep);
}
struct frame_unwind arm_prologue_unwind = {
NORMAL_FRAME,
arm_prologue_this_id,
arm_prologue_prev_register
};
static const struct frame_unwind *
arm_prologue_unwind_sniffer (struct frame_info *next_frame)
{
return &arm_prologue_unwind;
}
static struct arm_prologue_cache *
arm_make_stub_cache (struct frame_info *next_frame)
{
int reg;
struct arm_prologue_cache *cache;
CORE_ADDR unwound_fp;
cache = frame_obstack_zalloc (sizeof (struct arm_prologue_cache));
cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
cache->prev_sp = frame_unwind_register_unsigned (next_frame, ARM_SP_REGNUM);
return cache;
}
static void
arm_stub_this_id (struct frame_info *next_frame,
void **this_cache,
struct frame_id *this_id)
{
struct arm_prologue_cache *cache;
if (*this_cache == NULL)
*this_cache = arm_make_stub_cache (next_frame);
cache = *this_cache;
*this_id = frame_id_build (cache->prev_sp,
frame_pc_unwind (next_frame));
}
struct frame_unwind arm_stub_unwind = {
NORMAL_FRAME,
arm_stub_this_id,
arm_prologue_prev_register
};
static const struct frame_unwind *
arm_stub_unwind_sniffer (struct frame_info *next_frame)
{
char dummy[4];
if (in_plt_section (frame_unwind_address_in_block (next_frame), NULL)
|| target_read_memory (frame_pc_unwind (next_frame), dummy, 4) != 0)
return &arm_stub_unwind;
return NULL;
}
static CORE_ADDR
arm_normal_frame_base (struct frame_info *next_frame, void **this_cache)
{
struct arm_prologue_cache *cache;
if (*this_cache == NULL)
*this_cache = arm_make_prologue_cache (next_frame);
cache = *this_cache;
return cache->prev_sp + cache->frameoffset - cache->framesize;
}
struct frame_base arm_normal_base = {
&arm_prologue_unwind,
arm_normal_frame_base,
arm_normal_frame_base,
arm_normal_frame_base
};
static struct arm_prologue_cache *
arm_make_sigtramp_cache (struct frame_info *next_frame)
{
struct arm_prologue_cache *cache;
int reg;
cache = frame_obstack_zalloc (sizeof (struct arm_prologue_cache));
cache->prev_sp = frame_unwind_register_unsigned (next_frame, ARM_SP_REGNUM);
cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
for (reg = 0; reg < NUM_REGS; reg++)
cache->saved_regs[reg].addr
= SIGCONTEXT_REGISTER_ADDRESS (cache->prev_sp,
frame_pc_unwind (next_frame), reg);
cache->framereg = ARM_SP_REGNUM;
cache->prev_sp
= read_memory_integer (cache->saved_regs[cache->framereg].addr,
register_size (current_gdbarch, cache->framereg));
return cache;
}
static void
arm_sigtramp_this_id (struct frame_info *next_frame,
void **this_cache,
struct frame_id *this_id)
{
struct arm_prologue_cache *cache;
if (*this_cache == NULL)
*this_cache = arm_make_sigtramp_cache (next_frame);
cache = *this_cache;
*this_id = frame_id_build (cache->prev_sp, frame_pc_unwind (next_frame));
}
static void
arm_sigtramp_prev_register (struct frame_info *next_frame,
void **this_cache,
int prev_regnum,
int *optimized,
enum lval_type *lvalp,
CORE_ADDR *addrp,
int *realnump,
gdb_byte *valuep)
{
struct arm_prologue_cache *cache;
if (*this_cache == NULL)
*this_cache = arm_make_sigtramp_cache (next_frame);
cache = *this_cache;
trad_frame_get_prev_register (next_frame, cache->saved_regs, prev_regnum,
optimized, lvalp, addrp, realnump, valuep);
}
struct frame_unwind arm_sigtramp_unwind = {
SIGTRAMP_FRAME,
arm_sigtramp_this_id,
arm_sigtramp_prev_register
};
static const struct frame_unwind *
arm_sigtramp_unwind_sniffer (struct frame_info *next_frame)
{
if (SIGCONTEXT_REGISTER_ADDRESS_P ()
&& legacy_pc_in_sigtramp (frame_pc_unwind (next_frame), (char *) 0))
return &arm_sigtramp_unwind;
return NULL;
}
static struct frame_id
arm_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame)
{
return frame_id_build (frame_unwind_register_unsigned (next_frame, ARM_SP_REGNUM),
frame_pc_unwind (next_frame));
}
static CORE_ADDR
arm_unwind_pc (struct gdbarch *gdbarch, struct frame_info *this_frame)
{
CORE_ADDR pc;
pc = frame_unwind_register_unsigned (this_frame, ARM_PC_REGNUM);
return IS_THUMB_ADDR (pc) ? UNMAKE_THUMB_ADDR (pc) : pc;
}
static CORE_ADDR
arm_unwind_sp (struct gdbarch *gdbarch, struct frame_info *this_frame)
{
return frame_unwind_register_unsigned (this_frame, ARM_SP_REGNUM);
}
struct stack_item
{
int len;
struct stack_item *prev;
void *data;
};
static struct stack_item *
push_stack_item (struct stack_item *prev, void *contents, int len)
{
struct stack_item *si;
si = xmalloc (sizeof (struct stack_item));
si->data = xmalloc (len);
si->len = len;
si->prev = prev;
memcpy (si->data, contents, len);
return si;
}
static struct stack_item *
pop_stack_item (struct stack_item *si)
{
struct stack_item *dead = si;
si = si->prev;
xfree (dead->data);
xfree (dead);
return si;
}
static CORE_ADDR
arm_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
struct regcache *regcache, CORE_ADDR bp_addr, int nargs,
struct value **args, CORE_ADDR sp, int struct_return,
CORE_ADDR struct_addr)
{
int argnum;
int argreg;
int nstack;
struct stack_item *si = NULL;
regcache_cooked_write_unsigned (regcache, ARM_LR_REGNUM, bp_addr);
nstack = 0;
argreg = ARM_A1_REGNUM;
nstack = 0;
sp &= ~(CORE_ADDR)(2 * DEPRECATED_REGISTER_SIZE - 1);
if (struct_return)
{
if (arm_debug)
fprintf_unfiltered (gdb_stdlog, "struct return in %s = 0x%s\n",
REGISTER_NAME (argreg), paddr (struct_addr));
regcache_cooked_write_unsigned (regcache, argreg, struct_addr);
argreg++;
}
for (argnum = 0; argnum < nargs; argnum++)
{
int len;
struct type *arg_type;
struct type *target_type;
enum type_code typecode;
bfd_byte *val;
arg_type = check_typedef (value_type (args[argnum]));
len = TYPE_LENGTH (arg_type);
target_type = TYPE_TARGET_TYPE (arg_type);
typecode = TYPE_CODE (arg_type);
val = value_contents_writeable (args[argnum]);
if (TYPE_CODE_PTR == typecode
&& target_type != NULL
&& TYPE_CODE_FUNC == TYPE_CODE (target_type))
{
CORE_ADDR regval = extract_unsigned_integer (val, len);
if (arm_pc_is_thumb (regval))
{
val = alloca (len);
store_unsigned_integer (val, len, MAKE_THUMB_ADDR (regval));
}
}
while (len > 0)
{
int partial_len = len < DEPRECATED_REGISTER_SIZE ? len : DEPRECATED_REGISTER_SIZE;
if (argreg <= ARM_LAST_ARG_REGNUM)
{
CORE_ADDR regval = extract_unsigned_integer (val, partial_len);
if (arm_debug)
fprintf_unfiltered (gdb_stdlog, "arg %d in %s = 0x%s\n",
argnum, REGISTER_NAME (argreg),
phex (regval, DEPRECATED_REGISTER_SIZE));
regcache_cooked_write_unsigned (regcache, argreg, regval);
argreg++;
}
else
{
if (arm_debug)
fprintf_unfiltered (gdb_stdlog, "arg %d @ sp + %d\n",
argnum, nstack);
si = push_stack_item (si, val, DEPRECATED_REGISTER_SIZE);
nstack += DEPRECATED_REGISTER_SIZE;
}
len -= partial_len;
val += partial_len;
}
}
if (nstack & 4)
sp -= 4;
while (si)
{
sp -= si->len;
write_memory (sp, si->data, si->len);
si = pop_stack_item (si);
}
regcache_cooked_write_unsigned (regcache, ARM_SP_REGNUM, sp);
return sp;
}
static void
print_fpu_flags (int flags)
{
if (flags & (1 << 0))
fputs ("IVO ", stdout);
if (flags & (1 << 1))
fputs ("DVZ ", stdout);
if (flags & (1 << 2))
fputs ("OFL ", stdout);
if (flags & (1 << 3))
fputs ("UFL ", stdout);
if (flags & (1 << 4))
fputs ("INX ", stdout);
putchar ('\n');
}
static void
arm_print_float_info (struct gdbarch *gdbarch, struct ui_file *file,
struct frame_info *frame, const char *args)
{
unsigned long status = read_register (ARM_FPS_REGNUM);
int type;
type = (status >> 24) & 127;
if (status & (1 << 31))
printf (_("Hardware FPU type %d\n"), type);
else
printf (_("Software FPU type %d\n"), type);
fputs (_("mask: "), stdout);
print_fpu_flags (status >> 16);
fputs (_("flags: "), stdout);
print_fpu_flags (status);
}
static struct type *
arm_register_type (struct gdbarch *gdbarch, int regnum)
{
if (regnum >= ARM_F0_REGNUM && regnum < ARM_F0_REGNUM + NUM_FREGS)
{
if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
return builtin_type_arm_ext_big;
else
return builtin_type_arm_ext_littlebyte_bigword;
}
else
return builtin_type_int32;
}
static int
arm_register_byte (int regnum)
{
if (regnum < ARM_F0_REGNUM)
return regnum * INT_REGISTER_SIZE;
else if (regnum < ARM_PS_REGNUM)
return (NUM_GREGS * INT_REGISTER_SIZE
+ (regnum - ARM_F0_REGNUM) * FP_REGISTER_SIZE);
else
return (NUM_GREGS * INT_REGISTER_SIZE
+ NUM_FREGS * FP_REGISTER_SIZE
+ (regnum - ARM_FPS_REGNUM) * STATUS_REGISTER_SIZE);
}
static int
arm_register_sim_regno (int regnum)
{
int reg = regnum;
gdb_assert (reg >= 0 && reg < NUM_REGS);
if (reg < NUM_GREGS)
return SIM_ARM_R0_REGNUM + reg;
reg -= NUM_GREGS;
if (reg < NUM_FREGS)
return SIM_ARM_FP0_REGNUM + reg;
reg -= NUM_FREGS;
if (reg < NUM_SREGS)
return SIM_ARM_FPS_REGNUM + reg;
reg -= NUM_SREGS;
internal_error (__FILE__, __LINE__, _("Bad REGNUM %d"), regnum);
}
static void
convert_from_extended (const struct floatformat *fmt, const void *ptr,
void *dbl)
{
DOUBLEST d;
if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
floatformat_to_doublest (&floatformat_arm_ext_big, ptr, &d);
else
floatformat_to_doublest (&floatformat_arm_ext_littlebyte_bigword,
ptr, &d);
floatformat_from_doublest (fmt, &d, dbl);
}
static void
convert_to_extended (const struct floatformat *fmt, void *dbl, const void *ptr)
{
DOUBLEST d;
floatformat_to_doublest (fmt, ptr, &d);
if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
floatformat_from_doublest (&floatformat_arm_ext_big, &d, dbl);
else
floatformat_from_doublest (&floatformat_arm_ext_littlebyte_bigword,
&d, dbl);
}
static int
condition_true (unsigned long cond, unsigned long status_reg)
{
if (cond == INST_AL || cond == INST_NV)
return 1;
switch (cond)
{
case INST_EQ:
return ((status_reg & FLAG_Z) != 0);
case INST_NE:
return ((status_reg & FLAG_Z) == 0);
case INST_CS:
return ((status_reg & FLAG_C) != 0);
case INST_CC:
return ((status_reg & FLAG_C) == 0);
case INST_MI:
return ((status_reg & FLAG_N) != 0);
case INST_PL:
return ((status_reg & FLAG_N) == 0);
case INST_VS:
return ((status_reg & FLAG_V) != 0);
case INST_VC:
return ((status_reg & FLAG_V) == 0);
case INST_HI:
return ((status_reg & (FLAG_C | FLAG_Z)) == FLAG_C);
case INST_LS:
return ((status_reg & (FLAG_C | FLAG_Z)) != FLAG_C);
case INST_GE:
return (((status_reg & FLAG_N) == 0) == ((status_reg & FLAG_V) == 0));
case INST_LT:
return (((status_reg & FLAG_N) == 0) != ((status_reg & FLAG_V) == 0));
case INST_GT:
return (((status_reg & FLAG_Z) == 0) &&
(((status_reg & FLAG_N) == 0) == ((status_reg & FLAG_V) == 0)));
case INST_LE:
return (((status_reg & FLAG_Z) != 0) ||
(((status_reg & FLAG_N) == 0) != ((status_reg & FLAG_V) == 0)));
}
return 1;
}
#define submask(x) ((1L << ((x) + 1)) - 1)
#define bit(obj,st) (((obj) >> (st)) & 1)
#define bits(obj,st,fn) (((obj) >> (st)) & submask ((fn) - (st)))
#define sbits(obj,st,fn) \
((long) (bits(obj,st,fn) | ((long) bit(obj,fn) * ~ submask (fn - st))))
#define BranchDest(addr,instr) \
((CORE_ADDR) (((long) (addr)) + 8 + (sbits (instr, 0, 23) << 2)))
#define ARM_PC_32 1
static unsigned long
shifted_reg_val (unsigned long inst, int carry, unsigned long pc_val,
unsigned long status_reg)
{
unsigned long res, shift;
int rm = bits (inst, 0, 3);
unsigned long shifttype = bits (inst, 5, 6);
if (bit (inst, 4))
{
int rs = bits (inst, 8, 11);
shift = (rs == 15 ? pc_val + 8 : read_register (rs)) & 0xFF;
}
else
shift = bits (inst, 7, 11);
res = (rm == 15
? ((pc_val | (ARM_PC_32 ? 0 : status_reg))
+ (bit (inst, 4) ? 12 : 8))
: read_register (rm));
switch (shifttype)
{
case 0:
res = shift >= 32 ? 0 : res << shift;
break;
case 1:
res = shift >= 32 ? 0 : res >> shift;
break;
case 2:
if (shift >= 32)
shift = 31;
res = ((res & 0x80000000L)
? ~((~res) >> shift) : res >> shift);
break;
case 3:
shift &= 31;
if (shift == 0)
res = (res >> 1) | (carry ? 0x80000000L : 0);
else
res = (res >> shift) | (res << (32 - shift));
break;
}
return res & 0xffffffff;
}
static int
bitcount (unsigned long val)
{
int nbits;
for (nbits = 0; val != 0; nbits++)
val &= val - 1;
return nbits;
}
CORE_ADDR
thumb_get_next_pc (CORE_ADDR pc)
{
unsigned long pc_val = ((unsigned long) pc) + 4;
unsigned short inst1 = read_memory_integer (pc, 2);
CORE_ADDR nextpc = pc + 2;
unsigned long offset;
if ((inst1 & 0xff00) == 0xbd00)
{
CORE_ADDR sp;
offset = bitcount (bits (inst1, 0, 7)) * DEPRECATED_REGISTER_SIZE;
sp = read_register (ARM_SP_REGNUM);
nextpc = (CORE_ADDR) read_memory_integer (sp + offset, 4);
nextpc = ADDR_BITS_REMOVE (nextpc);
if (nextpc == pc)
error (_("Infinite loop detected"));
}
else if ((inst1 & 0xf000) == 0xd000)
{
unsigned long status = read_register (ARM_PS_REGNUM);
unsigned long cond = bits (inst1, 8, 11);
if (cond != 0x0f && condition_true (cond, status))
nextpc = pc_val + (sbits (inst1, 0, 7) << 1);
}
else if ((inst1 & 0xf800) == 0xe000)
{
nextpc = pc_val + (sbits (inst1, 0, 10) << 1);
}
else if ((inst1 & 0xf800) == 0xf000)
{
unsigned short inst2 = read_memory_integer (pc + 2, 2);
offset = (sbits (inst1, 0, 10) << 12) + (bits (inst2, 0, 10) << 1);
nextpc = pc_val + offset;
if (bits (inst2, 11, 12) == 1)
nextpc = nextpc & 0xfffffffc;
}
else if ((inst1 & 0xff00) == 0x4700)
{
if (bits (inst1, 3, 6) == 0x0f)
nextpc = pc_val;
else
nextpc = read_register (bits (inst1, 3, 6));
nextpc = ADDR_BITS_REMOVE (nextpc);
if (nextpc == pc)
error (_("Infinite loop detected"));
}
return nextpc;
}
CORE_ADDR
arm_get_next_pc (CORE_ADDR pc)
{
unsigned long pc_val;
unsigned long this_instr;
unsigned long status;
CORE_ADDR nextpc;
if (arm_pc_is_thumb (pc))
return thumb_get_next_pc (pc);
pc_val = (unsigned long) pc;
this_instr = read_memory_integer (pc, 4);
status = read_register (ARM_PS_REGNUM);
nextpc = (CORE_ADDR) (pc_val + 4);
if (condition_true (bits (this_instr, 28, 31), status))
{
switch (bits (this_instr, 24, 27))
{
case 0x0:
case 0x1:
case 0x2:
case 0x3:
{
unsigned long operand1, operand2, result = 0;
unsigned long rn;
int c;
if (bits (this_instr, 12, 15) != 15)
break;
if (bits (this_instr, 22, 25) == 0
&& bits (this_instr, 4, 7) == 9)
error (_("Invalid update to pc in instruction"));
if (bits (this_instr, 4, 28) == 0x12fff1
|| bits (this_instr, 4, 28) == 0x12fff3)
{
rn = bits (this_instr, 0, 3);
result = (rn == 15) ? pc_val + 8 : read_register (rn);
nextpc = (CORE_ADDR) ADDR_BITS_REMOVE (result);
if (nextpc == pc)
error (_("Infinite loop detected"));
return nextpc;
}
c = (status & FLAG_C) ? 1 : 0;
rn = bits (this_instr, 16, 19);
operand1 = (rn == 15) ? pc_val + 8 : read_register (rn);
if (bit (this_instr, 25))
{
unsigned long immval = bits (this_instr, 0, 7);
unsigned long rotate = 2 * bits (this_instr, 8, 11);
operand2 = ((immval >> rotate) | (immval << (32 - rotate)))
& 0xffffffff;
}
else
operand2 = shifted_reg_val (this_instr, c, pc_val, status);
switch (bits (this_instr, 21, 24))
{
case 0x0:
result = operand1 & operand2;
break;
case 0x1:
result = operand1 ^ operand2;
break;
case 0x2:
result = operand1 - operand2;
break;
case 0x3:
result = operand2 - operand1;
break;
case 0x4:
result = operand1 + operand2;
break;
case 0x5:
result = operand1 + operand2 + c;
break;
case 0x6:
result = operand1 - operand2 + c;
break;
case 0x7:
result = operand2 - operand1 + c;
break;
case 0x8:
case 0x9:
case 0xa:
case 0xb:
result = (unsigned long) nextpc;
break;
case 0xc:
result = operand1 | operand2;
break;
case 0xd:
result = operand2;
break;
case 0xe:
result = operand1 & ~operand2;
break;
case 0xf:
result = ~operand2;
break;
}
nextpc = (CORE_ADDR) ADDR_BITS_REMOVE (result);
if (nextpc == pc)
error (_("Infinite loop detected"));
break;
}
case 0x4:
case 0x5:
case 0x6:
case 0x7:
if (bit (this_instr, 20))
{
if (bits (this_instr, 12, 15) == 15)
{
unsigned long rn;
unsigned long base;
if (bit (this_instr, 22))
error (_("Invalid update to pc in instruction"));
rn = bits (this_instr, 16, 19);
base = (rn == 15) ? pc_val + 8 : read_register (rn);
if (bit (this_instr, 24))
{
int c = (status & FLAG_C) ? 1 : 0;
unsigned long offset =
(bit (this_instr, 25)
? shifted_reg_val (this_instr, c, pc_val, status)
: bits (this_instr, 0, 11));
if (bit (this_instr, 23))
base += offset;
else
base -= offset;
}
nextpc = (CORE_ADDR) read_memory_integer ((CORE_ADDR) base,
4);
nextpc = ADDR_BITS_REMOVE (nextpc);
if (nextpc == pc)
error (_("Infinite loop detected"));
}
}
break;
case 0x8:
case 0x9:
if (bit (this_instr, 20))
{
if (bit (this_instr, 15))
{
int offset = 0;
if (bit (this_instr, 23))
{
unsigned long reglist = bits (this_instr, 0, 14);
offset = bitcount (reglist) * 4;
if (bit (this_instr, 24))
offset += 4;
}
else if (bit (this_instr, 24))
offset = -4;
{
unsigned long rn_val =
read_register (bits (this_instr, 16, 19));
nextpc =
(CORE_ADDR) read_memory_integer ((CORE_ADDR) (rn_val
+ offset),
4);
}
nextpc = ADDR_BITS_REMOVE (nextpc);
if (nextpc == pc)
error (_("Infinite loop detected"));
}
}
break;
case 0xb:
case 0xa:
{
nextpc = BranchDest (pc, this_instr);
if (bits (this_instr, 28, 31) == INST_NV)
nextpc |= bit (this_instr, 24) << 1;
nextpc = ADDR_BITS_REMOVE (nextpc);
if (nextpc == pc)
error (_("Infinite loop detected"));
break;
}
case 0xc:
case 0xd:
case 0xe:
case 0xf:
break;
default:
fprintf_filtered (gdb_stderr, _("Bad bit-field extraction\n"));
return (pc);
}
}
return nextpc;
}
static void
arm_software_single_step (enum target_signal sig, int insert_bpt)
{
static int next_pc;
static char break_mem[BREAKPOINT_MAX];
if (insert_bpt)
{
next_pc = arm_get_next_pc (read_register (ARM_PC_REGNUM));
target_insert_breakpoint (next_pc, break_mem);
}
else
target_remove_breakpoint (next_pc, break_mem);
}
#include "bfd-in2.h"
#include "libcoff.h"
static int
gdb_print_insn_arm (bfd_vma memaddr, disassemble_info *info)
{
if (arm_pc_is_thumb (memaddr))
{
static asymbol *asym;
static combined_entry_type ce;
static struct coff_symbol_struct csym;
static struct bfd fake_bfd;
static bfd_target fake_target;
if (csym.native == NULL)
{
fake_target.flavour = bfd_target_coff_flavour;
fake_bfd.xvec = &fake_target;
ce.u.syment.n_sclass = C_THUMBEXTFUNC;
csym.native = &ce;
csym.symbol.the_bfd = &fake_bfd;
csym.symbol.name = "fake";
asym = (asymbol *) & csym;
}
memaddr = UNMAKE_THUMB_ADDR (memaddr);
info->symbols = &asym;
}
else
info->symbols = NULL;
if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
return print_insn_big_arm (memaddr, info);
else
return print_insn_little_arm (memaddr, info);
}
#ifndef ARM_LE_BREAKPOINT
#define ARM_LE_BREAKPOINT {0xFE,0xDE,0xFF,0xE7}
#endif
#ifndef ARM_BE_BREAKPOINT
#define ARM_BE_BREAKPOINT {0xE7,0xFF,0xDE,0xFE}
#endif
#ifndef THUMB_LE_BREAKPOINT
#define THUMB_LE_BREAKPOINT {0xfe,0xdf}
#endif
#ifndef THUMB_BE_BREAKPOINT
#define THUMB_BE_BREAKPOINT {0xdf,0xfe}
#endif
static const char arm_default_arm_le_breakpoint[] = ARM_LE_BREAKPOINT;
static const char arm_default_arm_be_breakpoint[] = ARM_BE_BREAKPOINT;
static const char arm_default_thumb_le_breakpoint[] = THUMB_LE_BREAKPOINT;
static const char arm_default_thumb_be_breakpoint[] = THUMB_BE_BREAKPOINT;
static const unsigned char *
arm_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
if (arm_pc_is_thumb (*pcptr))
{
*pcptr = UNMAKE_THUMB_ADDR (*pcptr);
*lenptr = tdep->thumb_breakpoint_size;
return tdep->thumb_breakpoint;
}
else
{
*lenptr = tdep->arm_breakpoint_size;
return tdep->arm_breakpoint;
}
}
static void
arm_extract_return_value (struct type *type, struct regcache *regs,
gdb_byte *valbuf)
{
if (TYPE_CODE_FLT == TYPE_CODE (type))
{
switch (gdbarch_tdep (current_gdbarch)->fp_model)
{
case ARM_FLOAT_FPA:
{
bfd_byte tmpbuf[FP_REGISTER_SIZE];
regcache_cooked_read (regs, ARM_F0_REGNUM, tmpbuf);
convert_from_extended (floatformat_from_type (type), tmpbuf,
valbuf);
}
break;
case ARM_FLOAT_SOFT_FPA:
case ARM_FLOAT_SOFT_VFP:
regcache_cooked_read (regs, ARM_A1_REGNUM, valbuf);
if (TYPE_LENGTH (type) > 4)
regcache_cooked_read (regs, ARM_A1_REGNUM + 1,
valbuf + INT_REGISTER_SIZE);
break;
default:
internal_error
(__FILE__, __LINE__,
_("arm_extract_return_value: Floating point model not supported"));
break;
}
}
else if (TYPE_CODE (type) == TYPE_CODE_INT
|| TYPE_CODE (type) == TYPE_CODE_CHAR
|| TYPE_CODE (type) == TYPE_CODE_BOOL
|| TYPE_CODE (type) == TYPE_CODE_PTR
|| TYPE_CODE (type) == TYPE_CODE_REF
|| TYPE_CODE (type) == TYPE_CODE_ENUM)
{
int len = TYPE_LENGTH (type);
int regno = ARM_A1_REGNUM;
ULONGEST tmp;
while (len > 0)
{
regcache_cooked_read_unsigned (regs, regno++, &tmp);
store_unsigned_integer (valbuf,
(len > INT_REGISTER_SIZE
? INT_REGISTER_SIZE : len),
tmp);
len -= INT_REGISTER_SIZE;
valbuf += INT_REGISTER_SIZE;
}
}
else
{
int len = TYPE_LENGTH (type);
int regno = ARM_A1_REGNUM;
bfd_byte tmpbuf[INT_REGISTER_SIZE];
while (len > 0)
{
regcache_cooked_read (regs, regno++, tmpbuf);
memcpy (valbuf, tmpbuf,
len > INT_REGISTER_SIZE ? INT_REGISTER_SIZE : len);
len -= INT_REGISTER_SIZE;
valbuf += INT_REGISTER_SIZE;
}
}
}
static CORE_ADDR
arm_extract_struct_value_address (struct regcache *regcache)
{
ULONGEST ret;
regcache_cooked_read_unsigned (regcache, ARM_A1_REGNUM, &ret);
return ret;
}
static int
arm_use_struct_convention (int gcc_p, struct type *type)
{
int nRc;
enum type_code code;
CHECK_TYPEDEF (type);
if (TYPE_LENGTH (type) > DEPRECATED_REGISTER_SIZE)
{
return 1;
}
code = TYPE_CODE (type);
if ((TYPE_CODE_STRUCT != code) && (TYPE_CODE_UNION != code))
{
return 1;
}
nRc = 0;
if ((TYPE_CODE_STRUCT == code) || (TYPE_CODE_UNION == code))
{
int i;
for (i = 0; i < TYPE_NFIELDS (type); i++)
{
enum type_code field_type_code;
field_type_code = TYPE_CODE (check_typedef (TYPE_FIELD_TYPE (type, i)));
if (field_type_code == TYPE_CODE_FLT)
{
nRc = 1;
break;
}
if (TYPE_FIELD_BITPOS (type, i) != 0)
{
if (TYPE_FIELD_BITSIZE (type, i) == 0)
{
nRc = 1;
break;
}
}
}
}
return nRc;
}
static void
arm_store_return_value (struct type *type, struct regcache *regs,
const gdb_byte *valbuf)
{
if (TYPE_CODE (type) == TYPE_CODE_FLT)
{
char buf[MAX_REGISTER_SIZE];
switch (gdbarch_tdep (current_gdbarch)->fp_model)
{
case ARM_FLOAT_FPA:
convert_to_extended (floatformat_from_type (type), buf, valbuf);
regcache_cooked_write (regs, ARM_F0_REGNUM, buf);
break;
case ARM_FLOAT_SOFT_FPA:
case ARM_FLOAT_SOFT_VFP:
regcache_cooked_write (regs, ARM_A1_REGNUM, valbuf);
if (TYPE_LENGTH (type) > 4)
regcache_cooked_write (regs, ARM_A1_REGNUM + 1,
valbuf + INT_REGISTER_SIZE);
break;
default:
internal_error
(__FILE__, __LINE__,
_("arm_store_return_value: Floating point model not supported"));
break;
}
}
else if (TYPE_CODE (type) == TYPE_CODE_INT
|| TYPE_CODE (type) == TYPE_CODE_CHAR
|| TYPE_CODE (type) == TYPE_CODE_BOOL
|| TYPE_CODE (type) == TYPE_CODE_PTR
|| TYPE_CODE (type) == TYPE_CODE_REF
|| TYPE_CODE (type) == TYPE_CODE_ENUM)
{
if (TYPE_LENGTH (type) <= 4)
{
bfd_byte tmpbuf[INT_REGISTER_SIZE];
LONGEST val = unpack_long (type, valbuf);
store_signed_integer (tmpbuf, INT_REGISTER_SIZE, val);
regcache_cooked_write (regs, ARM_A1_REGNUM, tmpbuf);
}
else
{
int len = TYPE_LENGTH (type);
int regno = ARM_A1_REGNUM;
while (len > 0)
{
regcache_cooked_write (regs, regno++, valbuf);
len -= INT_REGISTER_SIZE;
valbuf += INT_REGISTER_SIZE;
}
}
}
else
{
int len = TYPE_LENGTH (type);
int regno = ARM_A1_REGNUM;
bfd_byte tmpbuf[INT_REGISTER_SIZE];
while (len > 0)
{
memcpy (tmpbuf, valbuf,
len > INT_REGISTER_SIZE ? INT_REGISTER_SIZE : len);
regcache_cooked_write (regs, regno++, tmpbuf);
len -= INT_REGISTER_SIZE;
valbuf += INT_REGISTER_SIZE;
}
}
}
static int
arm_get_longjmp_target (CORE_ADDR *pc)
{
CORE_ADDR jb_addr;
char buf[INT_REGISTER_SIZE];
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
jb_addr = read_register (ARM_A1_REGNUM);
if (target_read_memory (jb_addr + tdep->jb_pc * tdep->jb_elt_size, buf,
INT_REGISTER_SIZE))
return 0;
*pc = extract_unsigned_integer (buf, INT_REGISTER_SIZE);
return 1;
}
int
arm_in_call_stub (CORE_ADDR pc, char *name)
{
CORE_ADDR start_addr;
if (0 == find_pc_partial_function (pc, name ? NULL : &name,
&start_addr, NULL))
return 0;
return strncmp (name, "_call_via_r", 11) == 0;
}
CORE_ADDR
arm_skip_stub (CORE_ADDR pc)
{
char *name;
CORE_ADDR start_addr;
if (find_pc_partial_function (pc, &name, &start_addr, NULL) == 0)
return 0;
if (strncmp (name, "_call_via_", 10) == 0)
{
static char *table[15] =
{"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
"r8", "r9", "sl", "fp", "ip", "sp", "lr"
};
int regno;
for (regno = 0; regno <= 14; regno++)
if (strcmp (&name[10], table[regno]) == 0)
return read_register (regno);
}
return 0;
}
static void
set_arm_command (char *args, int from_tty)
{
printf_unfiltered (_("\
\"set arm\" must be followed by an apporpriate subcommand.\n"));
help_list (setarmcmdlist, "set arm ", all_commands, gdb_stdout);
}
static void
show_arm_command (char *args, int from_tty)
{
cmd_show_list (showarmcmdlist, from_tty, "");
}
static void
arm_update_current_architecture (void)
{
struct gdbarch_info info;
if (gdbarch_bfd_arch_info (current_gdbarch)->arch != bfd_arch_arm)
return;
gdbarch_info_init (&info);
if (!gdbarch_update_p (info))
internal_error (__FILE__, __LINE__, "could not update architecture");
}
static void
set_fp_model_sfunc (char *args, int from_tty,
struct cmd_list_element *c)
{
enum arm_float_model fp_model;
for (fp_model = ARM_FLOAT_AUTO; fp_model != ARM_FLOAT_LAST; fp_model++)
if (strcmp (current_fp_model, fp_model_strings[fp_model]) == 0)
{
arm_fp_model = fp_model;
break;
}
if (fp_model == ARM_FLOAT_LAST)
internal_error (__FILE__, __LINE__, _("Invalid fp model accepted: %s."),
current_fp_model);
arm_update_current_architecture ();
}
static void
show_fp_model (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
if (arm_fp_model == ARM_FLOAT_AUTO
&& gdbarch_bfd_arch_info (current_gdbarch)->arch == bfd_arch_arm)
fprintf_filtered (file, _("\
The current ARM floating point model is \"auto\" (currently \"%s\").\n"),
fp_model_strings[tdep->fp_model]);
else
fprintf_filtered (file, _("\
The current ARM floating point model is \"%s\".\n"),
fp_model_strings[arm_fp_model]);
}
static void
arm_set_abi (char *args, int from_tty,
struct cmd_list_element *c)
{
enum arm_abi_kind arm_abi;
for (arm_abi = ARM_ABI_AUTO; arm_abi != ARM_ABI_LAST; arm_abi++)
if (strcmp (arm_abi_string, arm_abi_strings[arm_abi]) == 0)
{
arm_abi_global = arm_abi;
break;
}
if (arm_abi == ARM_ABI_LAST)
internal_error (__FILE__, __LINE__, _("Invalid ABI accepted: %s."),
arm_abi_string);
arm_update_current_architecture ();
}
static void
arm_show_abi (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
if (arm_abi_global == ARM_ABI_AUTO
&& gdbarch_bfd_arch_info (current_gdbarch)->arch == bfd_arch_arm)
fprintf_filtered (file, _("\
The current ARM ABI is \"auto\" (currently \"%s\").\n"),
arm_abi_strings[tdep->arm_abi]);
else
fprintf_filtered (file, _("The current ARM ABI is \"%s\".\n"),
arm_abi_string);
}
static void
set_disassembly_style_sfunc (char *args, int from_tty,
struct cmd_list_element *c)
{
set_disassembly_style ();
}
static const char *
arm_register_name (int i)
{
return arm_register_names[i];
}
static void
set_disassembly_style (void)
{
const char *setname, *setdesc, *const *regnames;
int numregs, j;
int current = 0;
numregs = get_arm_regnames (current, &setname, &setdesc, ®names);
while ((disassembly_style != setname)
&& (current < num_disassembly_options))
get_arm_regnames (++current, &setname, &setdesc, ®names);
current_option = current;
for (j = 0; j < numregs; j++)
arm_register_names[j] = (char *) regnames[j];
if (isupper (*regnames[ARM_PC_REGNUM]))
{
arm_register_names[ARM_FPS_REGNUM] = "FPS";
arm_register_names[ARM_PS_REGNUM] = "CPSR";
}
else
{
arm_register_names[ARM_FPS_REGNUM] = "fps";
arm_register_names[ARM_PS_REGNUM] = "cpsr";
}
set_arm_regname_option (current);
}
static int
coff_sym_is_thumb (int val)
{
return (val == C_THUMBEXT ||
val == C_THUMBSTAT ||
val == C_THUMBEXTFUNC ||
val == C_THUMBSTATFUNC ||
val == C_THUMBLABEL);
}
static void
arm_elf_make_msymbol_special(asymbol *sym, struct minimal_symbol *msym)
{
if (ELF_ST_TYPE (((elf_symbol_type *)sym)->internal_elf_sym.st_info)
== STT_LOPROC)
MSYMBOL_SET_SPECIAL (msym);
}
static void
arm_coff_make_msymbol_special(int val, struct minimal_symbol *msym)
{
if (coff_sym_is_thumb (val))
MSYMBOL_SET_SPECIAL (msym);
}
static void
arm_write_pc (CORE_ADDR pc, ptid_t ptid)
{
write_register_pid (ARM_PC_REGNUM, pc, ptid);
if (arm_apcs_32)
{
CORE_ADDR val = read_register_pid (ARM_PS_REGNUM, ptid);
if (arm_pc_is_thumb (pc))
write_register_pid (ARM_PS_REGNUM, val | 0x20, ptid);
else
write_register_pid (ARM_PS_REGNUM, val & ~(CORE_ADDR) 0x20, ptid);
}
}
static enum gdb_osabi
arm_elf_osabi_sniffer (bfd *abfd)
{
unsigned int elfosabi, eflags;
enum gdb_osabi osabi = GDB_OSABI_UNKNOWN;
elfosabi = elf_elfheader (abfd)->e_ident[EI_OSABI];
if (elfosabi == ELFOSABI_ARM)
bfd_map_over_sections (abfd,
generic_elf_osabi_sniff_abi_tag_sections,
&osabi);
return osabi;
}
static struct gdbarch *
arm_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
{
struct gdbarch_tdep *tdep;
struct gdbarch *gdbarch;
struct gdbarch_list *best_arch;
enum arm_abi_kind arm_abi = arm_abi_global;
enum arm_float_model fp_model = arm_fp_model;
if (arm_abi == ARM_ABI_AUTO && info.abfd != NULL)
{
int ei_osabi;
switch (bfd_get_flavour (info.abfd))
{
case bfd_target_aout_flavour:
arm_abi = ARM_ABI_APCS;
break;
case bfd_target_coff_flavour:
arm_abi = ARM_ABI_APCS;
break;
case bfd_target_elf_flavour:
ei_osabi = elf_elfheader (info.abfd)->e_ident[EI_OSABI];
if (ei_osabi == ELFOSABI_ARM)
{
arm_abi = ARM_ABI_APCS;
}
else if (ei_osabi == ELFOSABI_NONE)
{
int e_flags, eabi_ver;
e_flags = elf_elfheader (info.abfd)->e_flags;
eabi_ver = EF_ARM_EABI_VERSION (e_flags);
switch (eabi_ver)
{
case EF_ARM_EABI_UNKNOWN:
arm_abi = ARM_ABI_APCS;
break;
case EF_ARM_EABI_VER4:
arm_abi = ARM_ABI_AAPCS;
break;
default:
warning (_("unknown ARM EABI version 0x%x"), eabi_ver);
arm_abi = ARM_ABI_APCS;
break;
}
}
break;
default:
break;
}
}
if (arches != NULL)
{
if (arm_abi == ARM_ABI_AUTO)
arm_abi = gdbarch_tdep (arches->gdbarch)->arm_abi;
if (fp_model == ARM_FLOAT_AUTO)
fp_model = gdbarch_tdep (arches->gdbarch)->fp_model;
}
else
{
if (arm_abi == ARM_ABI_AUTO)
arm_abi = ARM_ABI_APCS;
if (fp_model == ARM_FLOAT_AUTO)
fp_model = ARM_FLOAT_SOFT_FPA;
}
for (best_arch = gdbarch_list_lookup_by_info (arches, &info);
best_arch != NULL;
best_arch = gdbarch_list_lookup_by_info (best_arch->next, &info))
{
if (arm_abi != gdbarch_tdep (best_arch->gdbarch)->arm_abi)
continue;
if (fp_model != gdbarch_tdep (best_arch->gdbarch)->fp_model)
continue;
break;
}
if (best_arch != NULL)
return best_arch->gdbarch;
tdep = xcalloc (1, sizeof (struct gdbarch_tdep));
gdbarch = gdbarch_alloc (&info, tdep);
tdep->arm_abi = arm_abi;
tdep->fp_model = fp_model;
switch (info.byte_order)
{
case BFD_ENDIAN_BIG:
tdep->arm_breakpoint = arm_default_arm_be_breakpoint;
tdep->arm_breakpoint_size = sizeof (arm_default_arm_be_breakpoint);
tdep->thumb_breakpoint = arm_default_thumb_be_breakpoint;
tdep->thumb_breakpoint_size = sizeof (arm_default_thumb_be_breakpoint);
break;
case BFD_ENDIAN_LITTLE:
tdep->arm_breakpoint = arm_default_arm_le_breakpoint;
tdep->arm_breakpoint_size = sizeof (arm_default_arm_le_breakpoint);
tdep->thumb_breakpoint = arm_default_thumb_le_breakpoint;
tdep->thumb_breakpoint_size = sizeof (arm_default_thumb_le_breakpoint);
break;
default:
internal_error (__FILE__, __LINE__,
_("arm_gdbarch_init: bad byte order for float format"));
}
set_gdbarch_char_signed (gdbarch, 0);
tdep->lowest_pc = 0x20;
tdep->jb_pc = -1;
set_gdbarch_push_dummy_call (gdbarch, arm_push_dummy_call);
set_gdbarch_write_pc (gdbarch, arm_write_pc);
set_gdbarch_unwind_dummy_id (gdbarch, arm_unwind_dummy_id);
set_gdbarch_unwind_pc (gdbarch, arm_unwind_pc);
set_gdbarch_unwind_sp (gdbarch, arm_unwind_sp);
frame_base_set_default (gdbarch, &arm_normal_base);
set_gdbarch_smash_text_address (gdbarch, arm_smash_text_address);
set_gdbarch_addr_bits_remove (gdbarch, arm_addr_bits_remove);
set_gdbarch_skip_prologue (gdbarch, arm_skip_prologue);
set_gdbarch_deprecated_saved_pc_after_call (gdbarch, arm_saved_pc_after_call);
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
set_gdbarch_breakpoint_from_pc (gdbarch, arm_breakpoint_from_pc);
set_gdbarch_print_float_info (gdbarch, arm_print_float_info);
set_gdbarch_deprecated_fp_regnum (gdbarch, ARM_FP_REGNUM);
set_gdbarch_sp_regnum (gdbarch, ARM_SP_REGNUM);
set_gdbarch_pc_regnum (gdbarch, ARM_PC_REGNUM);
set_gdbarch_deprecated_register_byte (gdbarch, arm_register_byte);
set_gdbarch_num_regs (gdbarch, NUM_GREGS + NUM_FREGS + NUM_SREGS);
set_gdbarch_register_type (gdbarch, arm_register_type);
set_gdbarch_register_sim_regno (gdbarch, arm_register_sim_regno);
set_gdbarch_deprecated_register_size (gdbarch, 4);
set_gdbarch_register_name (gdbarch, arm_register_name);
set_gdbarch_extract_return_value (gdbarch, arm_extract_return_value);
set_gdbarch_store_return_value (gdbarch, arm_store_return_value);
set_gdbarch_deprecated_use_struct_convention (gdbarch, arm_use_struct_convention);
set_gdbarch_deprecated_extract_struct_value_address (gdbarch, arm_extract_struct_value_address);
set_gdbarch_software_single_step (gdbarch, arm_software_single_step);
set_gdbarch_print_insn (gdbarch, gdb_print_insn_arm);
set_gdbarch_elf_make_msymbol_special (gdbarch, arm_elf_make_msymbol_special);
set_gdbarch_coff_make_msymbol_special (gdbarch,
arm_coff_make_msymbol_special);
gdbarch_init_osabi (info, gdbarch);
frame_unwind_append_sniffer (gdbarch, arm_stub_unwind_sniffer);
frame_unwind_append_sniffer (gdbarch, arm_sigtramp_unwind_sniffer);
frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);
frame_unwind_append_sniffer (gdbarch, arm_prologue_unwind_sniffer);
if (tdep->jb_pc >= 0)
set_gdbarch_get_longjmp_target (gdbarch, arm_get_longjmp_target);
switch (info.byte_order)
{
case BFD_ENDIAN_BIG:
set_gdbarch_float_format (gdbarch, &floatformat_ieee_single_big);
set_gdbarch_double_format (gdbarch, &floatformat_ieee_double_big);
set_gdbarch_long_double_format (gdbarch, &floatformat_ieee_double_big);
break;
case BFD_ENDIAN_LITTLE:
set_gdbarch_float_format (gdbarch, &floatformat_ieee_single_little);
if (fp_model == ARM_FLOAT_SOFT_FPA || fp_model == ARM_FLOAT_FPA)
{
set_gdbarch_double_format
(gdbarch, &floatformat_ieee_double_littlebyte_bigword);
set_gdbarch_long_double_format
(gdbarch, &floatformat_ieee_double_littlebyte_bigword);
}
else
{
set_gdbarch_double_format (gdbarch, &floatformat_ieee_double_little);
set_gdbarch_long_double_format (gdbarch,
&floatformat_ieee_double_little);
}
break;
default:
internal_error (__FILE__, __LINE__,
_("arm_gdbarch_init: bad byte order for float format"));
}
return gdbarch;
}
static void
arm_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
if (tdep == NULL)
return;
fprintf_unfiltered (file, _("arm_dump_tdep: Lowest pc = 0x%lx"),
(unsigned long) tdep->lowest_pc);
}
extern initialize_file_ftype _initialize_arm_tdep;
void
_initialize_arm_tdep (void)
{
struct ui_file *stb;
long length;
struct cmd_list_element *new_set, *new_show;
const char *setname;
const char *setdesc;
const char *const *regnames;
int numregs, i, j;
static char *helptext;
char regdesc[1024], *rdptr = regdesc;
size_t rest = sizeof (regdesc);
gdbarch_register (bfd_arch_arm, arm_gdbarch_init, arm_dump_tdep);
gdbarch_register_osabi_sniffer (bfd_arch_arm,
bfd_target_elf_flavour,
arm_elf_osabi_sniffer);
num_disassembly_options = get_arm_regname_num_options ();
add_prefix_cmd ("arm", no_class, set_arm_command,
_("Various ARM-specific commands."),
&setarmcmdlist, "set arm ", 0, &setlist);
add_prefix_cmd ("arm", no_class, show_arm_command,
_("Various ARM-specific commands."),
&showarmcmdlist, "show arm ", 0, &showlist);
parse_arm_disassembler_option ("reg-names-std");
valid_disassembly_styles
= xmalloc ((num_disassembly_options + 1) * sizeof (char *));
for (i = 0; i < num_disassembly_options; i++)
{
numregs = get_arm_regnames (i, &setname, &setdesc, ®names);
valid_disassembly_styles[i] = setname;
length = snprintf (rdptr, rest, "%s - %s\n", setname, setdesc);
rdptr += length;
rest -= length;
if (!strcmp (setname, "std"))
{
disassembly_style = setname;
current_option = i;
for (j = 0; j < numregs; j++)
arm_register_names[j] = (char *) regnames[j];
set_arm_regname_option (i);
}
}
valid_disassembly_styles[num_disassembly_options] = NULL;
stb = mem_fileopen ();
fprintf_unfiltered (stb, "%s%s%s",
_("The valid values are:\n"),
regdesc,
_("The default is \"std\"."));
helptext = ui_file_xstrdup (stb, &length);
ui_file_delete (stb);
add_setshow_enum_cmd("disassembler", no_class,
valid_disassembly_styles, &disassembly_style,
_("Set the disassembly style."),
_("Show the disassembly style."),
helptext,
set_disassembly_style_sfunc,
NULL,
&setarmcmdlist, &showarmcmdlist);
add_setshow_boolean_cmd ("apcs32", no_class, &arm_apcs_32,
_("Set usage of ARM 32-bit mode."),
_("Show usage of ARM 32-bit mode."),
_("When off, a 26-bit PC will be used."),
NULL,
NULL,
&setarmcmdlist, &showarmcmdlist);
add_setshow_enum_cmd ("fpu", no_class, fp_model_strings, ¤t_fp_model,
_("Set the floating point type."),
_("Show the floating point type."),
_("auto - Determine the FP typefrom the OS-ABI.\n\
softfpa - Software FP, mixed-endian doubles on little-endian ARMs.\n\
fpa - FPA co-processor (GCC compiled).\n\
softvfp - Software FP with pure-endian doubles.\n\
vfp - VFP co-processor."),
set_fp_model_sfunc, show_fp_model,
&setarmcmdlist, &showarmcmdlist);
add_setshow_enum_cmd ("abi", class_support, arm_abi_strings, &arm_abi_string,
_("Set the ABI."),
_("Show the ABI."),
NULL, arm_set_abi, arm_show_abi,
&setarmcmdlist, &showarmcmdlist);
add_setshow_boolean_cmd ("arm", class_maintenance, &arm_debug,
_("Set ARM debugging."),
_("Show ARM debugging."),
_("When on, arm-specific debugging is enabled."),
NULL,
NULL,
&setdebuglist, &showdebuglist);
}