/* Target-dependent code for the x86-64 for GDB, the GNU debugger.
- Copyright 2001
- Free Software Foundation, Inc.
+
+ Copyright 2001, 2002 Free Software Foundation, Inc.
Contributed by Jiri Smid, SuSE Labs.
This file is part of GDB.
#include "arch-utils.h"
#include "regcache.h"
#include "symfile.h"
+#include "objfiles.h"
#include "x86-64-tdep.h"
#include "dwarf2cfi.h"
-#include "value.h"
-
+#include "gdb_assert.h"
/* Register numbers of various important registers. */
#define RAX_REGNUM 0
-#define RDX_REGNUM 1
+#define RDX_REGNUM 3
#define RDI_REGNUM 5
#define EFLAGS_REGNUM 17
-#define XMM1_REGNUM 35
+#define ST0_REGNUM 22
+#define XMM1_REGNUM 39
+
+struct register_info
+{
+ int size;
+ char *name;
+ struct type **type;
+};
/* x86_64_register_raw_size_table[i] is the number of bytes of storage in
GDB's register array occupied by register i. */
-int x86_64_register_raw_size_table[X86_64_NUM_REGS] = {
- 8, 8, 8, 8,
- 8, 8, 8, 8,
- 8, 8, 8, 8,
- 8, 8, 8, 8,
- 8, 4,
- 10, 10, 10, 10,
- 10, 10, 10, 10,
- 4, 4, 4, 4,
- 4, 4, 4, 4,
- 16, 16, 16, 16,
- 16, 16, 16, 16,
- 16, 16, 16, 16,
- 16, 16, 16, 16,
- 4
+static struct register_info x86_64_register_info_table[] = {
+ /* 0 */ {8, "rax", &builtin_type_int64},
+ /* 1 */ {8, "rbx", &builtin_type_int64},
+ /* 2 */ {8, "rcx", &builtin_type_int64},
+ /* 3 */ {8, "rdx", &builtin_type_int64},
+ /* 4 */ {8, "rsi", &builtin_type_int64},
+ /* 5 */ {8, "rdi", &builtin_type_int64},
+ /* 6 */ {8, "rbp", &builtin_type_void_func_ptr},
+ /* 7 */ {8, "rsp", &builtin_type_void_func_ptr},
+ /* 8 */ {8, "r8", &builtin_type_int64},
+ /* 9 */ {8, "r9", &builtin_type_int64},
+ /* 10 */ {8, "r10", &builtin_type_int64},
+ /* 11 */ {8, "r11", &builtin_type_int64},
+ /* 12 */ {8, "r12", &builtin_type_int64},
+ /* 13 */ {8, "r13", &builtin_type_int64},
+ /* 14 */ {8, "r14", &builtin_type_int64},
+ /* 15 */ {8, "r15", &builtin_type_int64},
+ /* 16 */ {8, "rip", &builtin_type_void_func_ptr},
+ /* 17 */ {4, "eflags", &builtin_type_int32},
+ /* 18 */ {4, "ds", &builtin_type_int32},
+ /* 19 */ {4, "es", &builtin_type_int32},
+ /* 20 */ {4, "fs", &builtin_type_int32},
+ /* 21 */ {4, "gs", &builtin_type_int32},
+ /* 22 */ {10, "st0", &builtin_type_i387_ext},
+ /* 23 */ {10, "st1", &builtin_type_i387_ext},
+ /* 24 */ {10, "st2", &builtin_type_i387_ext},
+ /* 25 */ {10, "st3", &builtin_type_i387_ext},
+ /* 26 */ {10, "st4", &builtin_type_i387_ext},
+ /* 27 */ {10, "st5", &builtin_type_i387_ext},
+ /* 28 */ {10, "st6", &builtin_type_i387_ext},
+ /* 29 */ {10, "st7", &builtin_type_i387_ext},
+ /* 30 */ {4, "fctrl", &builtin_type_int32},
+ /* 31 */ {4, "fstat", &builtin_type_int32},
+ /* 32 */ {4, "ftag", &builtin_type_int32},
+ /* 33 */ {4, "fiseg", &builtin_type_int32},
+ /* 34 */ {4, "fioff", &builtin_type_int32},
+ /* 35 */ {4, "foseg", &builtin_type_int32},
+ /* 36 */ {4, "fooff", &builtin_type_int32},
+ /* 37 */ {4, "fop", &builtin_type_int32},
+ /* 38 */ {16, "xmm0", &builtin_type_v4sf},
+ /* 39 */ {16, "xmm1", &builtin_type_v4sf},
+ /* 40 */ {16, "xmm2", &builtin_type_v4sf},
+ /* 41 */ {16, "xmm3", &builtin_type_v4sf},
+ /* 42 */ {16, "xmm4", &builtin_type_v4sf},
+ /* 43 */ {16, "xmm5", &builtin_type_v4sf},
+ /* 44 */ {16, "xmm6", &builtin_type_v4sf},
+ /* 45 */ {16, "xmm7", &builtin_type_v4sf},
+ /* 46 */ {16, "xmm8", &builtin_type_v4sf},
+ /* 47 */ {16, "xmm9", &builtin_type_v4sf},
+ /* 48 */ {16, "xmm10", &builtin_type_v4sf},
+ /* 49 */ {16, "xmm11", &builtin_type_v4sf},
+ /* 50 */ {16, "xmm12", &builtin_type_v4sf},
+ /* 51 */ {16, "xmm13", &builtin_type_v4sf},
+ /* 52 */ {16, "xmm14", &builtin_type_v4sf},
+ /* 53 */ {16, "xmm15", &builtin_type_v4sf},
+ /* 54 */ {4, "mxcsr", &builtin_type_int32}
+};
+
+/* This array is a mapping from Dwarf-2 register
+ numbering to GDB's one. Dwarf-2 numbering is
+ defined in x86-64 ABI, section 3.6. */
+static int x86_64_dwarf2gdb_regno_map[] = {
+ 0, 1, 2, 3, /* RAX - RDX */
+ 4, 5, 6, 7, /* RSI, RDI, RBP, RSP */
+ 8, 9, 10, 11, /* R8 - R11 */
+ 12, 13, 14, 15, /* R12 - R15 */
+ -1, /* RA - not mapped */
+ XMM1_REGNUM - 1, XMM1_REGNUM, /* XMM0 ... */
+ XMM1_REGNUM + 1, XMM1_REGNUM + 2,
+ XMM1_REGNUM + 3, XMM1_REGNUM + 4,
+ XMM1_REGNUM + 5, XMM1_REGNUM + 6,
+ XMM1_REGNUM + 7, XMM1_REGNUM + 8,
+ XMM1_REGNUM + 9, XMM1_REGNUM + 10,
+ XMM1_REGNUM + 11, XMM1_REGNUM + 12,
+ XMM1_REGNUM + 13, XMM1_REGNUM + 14, /* ... XMM15 */
+ ST0_REGNUM + 0, ST0_REGNUM + 1, /* ST0 ... */
+ ST0_REGNUM + 2, ST0_REGNUM + 3,
+ ST0_REGNUM + 4, ST0_REGNUM + 5,
+ ST0_REGNUM + 6, ST0_REGNUM + 7 /* ... ST7 */
};
+static int x86_64_dwarf2gdb_regno_map_length =
+ sizeof (x86_64_dwarf2gdb_regno_map) /
+ sizeof (x86_64_dwarf2gdb_regno_map[0]);
+
+/* Number of all registers */
+#define X86_64_NUM_REGS (sizeof (x86_64_register_info_table) / \
+ sizeof (x86_64_register_info_table[0]))
+
+/* Number of general registers. */
+#define X86_64_NUM_GREGS (22)
+
+int x86_64_num_regs = X86_64_NUM_REGS;
+int x86_64_num_gregs = X86_64_NUM_GREGS;
+
+/* Did we already print a note about frame pointer? */
+int omit_fp_note_printed = 0;
+
/* Number of bytes of storage in the actual machine representation for
register REGNO. */
int
x86_64_register_raw_size (int regno)
{
- return x86_64_register_raw_size_table[regno];
+ return x86_64_register_info_table[regno].size;
}
/* x86_64_register_byte_table[i] is the offset into the register file of the
start of register number i. We initialize this from
- x86_64_register_raw_size_table. */
+ x86_64_register_info_table. */
int x86_64_register_byte_table[X86_64_NUM_REGS];
/* Index within `registers' of the first byte of the space for register REGNO. */
static struct type *
x86_64_register_virtual_type (int regno)
{
- if (regno == PC_REGNUM || regno == SP_REGNUM)
- return lookup_pointer_type (builtin_type_void);
- if (IS_FP_REGNUM (regno))
- return builtin_type_long_double;
- if (IS_SSE_REGNUM (regno))
- return builtin_type_v4sf;
- if (IS_FPU_CTRL_REGNUM (regno) || regno == MXCSR_REGNUM
- || regno == EFLAGS_REGNUM)
- return builtin_type_int;
- return builtin_type_long;
+ return *x86_64_register_info_table[regno].type;
+}
+
+/* FIXME: cagney/2002-11-11: Once the i386 and x86-64 targets are
+ merged, this function can go away. */
+int
+i386_fp_regnum_p (int regnum)
+{
+ return (regnum < NUM_REGS
+ && (FP0_REGNUM && FP0_REGNUM <= (regnum) && (regnum) < FPC_REGNUM));
}
/* x86_64_register_convertible is true if register N's virtual format is
x86_64_register_convert_to_virtual (int regnum, struct type *type,
char *from, char *to)
{
-/* Copy straight over, but take care of the padding. */
- memcpy (to, from, FPU_REG_RAW_SIZE);
- memset (to + FPU_REG_RAW_SIZE, 0, TYPE_LENGTH (type) - FPU_REG_RAW_SIZE);
+ char buf[12];
+
+ /* We only support floating-point values. */
+ if (TYPE_CODE (type) != TYPE_CODE_FLT)
+ {
+ warning ("Cannot convert floating-point register value "
+ "to non-floating-point type.");
+ memset (to, 0, TYPE_LENGTH (type));
+ return;
+ }
+ /* First add the necessary padding. */
+ memcpy (buf, from, FPU_REG_RAW_SIZE);
+ memset (buf + FPU_REG_RAW_SIZE, 0, sizeof buf - FPU_REG_RAW_SIZE);
+ /* Convert to TYPE. This should be a no-op, if TYPE is equivalent
+ to the extended floating-point format used by the FPU. */
+ convert_typed_floating (to, type, buf,
+ x86_64_register_virtual_type (regnum));
}
/* Convert data from virtual format with type TYPE in buffer FROM to
x86_64_register_convert_to_raw (struct type *type, int regnum,
char *from, char *to)
{
+ gdb_assert (TYPE_CODE (type) == TYPE_CODE_FLT && TYPE_LENGTH (type) == 12);
+ /* Simply omit the two unused bytes. */
memcpy (to, from, FPU_REG_RAW_SIZE);
}
-\f
+
+/* Dwarf-2 <-> GDB register numbers mapping. */
+int
+x86_64_dwarf2_reg_to_regnum (int dw_reg)
+{
+ if (dw_reg < 0 || dw_reg > x86_64_dwarf2gdb_regno_map_length)
+ {
+ warning ("Dwarf-2 uses unmapped register #%d\n", dw_reg);
+ return dw_reg;
+ }
+
+ return x86_64_dwarf2gdb_regno_map[dw_reg];
+}
/* This is the variable that is set with "set disassembly-flavour", and
its legitimate values. */
};
static const char *disassembly_flavour = att_flavour;
+/* Push the return address (pointing to the call dummy) onto the stack
+ and return the new value for the stack pointer. */
+
static CORE_ADDR
x86_64_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
{
char buf[8];
store_unsigned_integer (buf, 8, CALL_DUMMY_ADDRESS ());
-
write_memory (sp - 8, buf, 8);
return sp - 8;
}
-void
+static void
x86_64_pop_frame (void)
{
generic_pop_current_frame (cfi_pop_frame);
if (class1 == class2)
return class1;
- /* Rule #2: If one of the classes is NO_CLASS, the resulting class is
- the other class. */
+ /* Rule #2: If one of the classes is NO_CLASS, the resulting class
+ is the other class. */
if (class1 == X86_64_NO_CLASS)
return class2;
if (class2 == X86_64_NO_CLASS)
return X86_64_SSE_CLASS;
}
+/* Classify the argument type. CLASSES will be filled by the register
+ class used to pass each word of the operand. The number of words
+ is returned. In case the parameter should be passed in memory, 0
+ is returned. As a special case for zero sized containers,
+ classes[0] will be NO_CLASS and 1 is returned.
-/* Classify the argument type.
- CLASSES will be filled by the register class used to pass each word
- of the operand. The number of words is returned. In case the parameter
- should be passed in memory, 0 is returned. As a special case for zero
- sized containers, classes[0] will be NO_CLASS and 1 is returned.
-
- See the x86-64 PS ABI for details.
-*/
+ See the x86-64 psABI for details. */
static int
classify_argument (struct type *type,
for (i = 0; i < words; i++)
classes[i] = X86_64_NO_CLASS;
- /* Zero sized arrays or structures are NO_CLASS. We return 0 to
- signalize memory class, so handle it as special case. */
+ /* Zero sized arrays or structures are NO_CLASS. We return 0
+ to signalize memory class, so handle it as special case. */
if (!words)
{
classes[0] = X86_64_NO_CLASS;
case TYPE_CODE_STRUCT:
{
int j;
- for (j = 0; j < type->nfields; ++j)
+ for (j = 0; j < TYPE_NFIELDS (type); ++j)
{
- int num = classify_argument (type->fields[j].type,
+ int num = classify_argument (TYPE_FIELDS (type)[j].type,
subclasses,
- (type->fields[j].loc.bitpos
- + bit_offset) % 256);
+ (TYPE_FIELDS (type)[j].loc.
+ bitpos + bit_offset) % 256);
if (!num)
return 0;
for (i = 0; i < num; i++)
{
int pos =
- (type->fields[j].loc.bitpos + bit_offset) / 8 / 8;
+ (TYPE_FIELDS (type)[j].loc.bitpos +
+ bit_offset) / 8 / 8;
classes[i + pos] =
merge_classes (subclasses[i], classes[i + pos]);
}
{
int num;
- num = classify_argument (type->target_type,
+ num = classify_argument (TYPE_TARGET_TYPE (type),
subclasses, bit_offset);
if (!num)
return 0;
{
int j;
{
- for (j = 0; j < type->nfields; ++j)
+ for (j = 0; j < TYPE_NFIELDS (type); ++j)
{
int num;
- num = classify_argument (type->fields[j].type,
+ num = classify_argument (TYPE_FIELDS (type)[j].type,
subclasses, bit_offset);
if (!num)
return 0;
}
}
break;
+ default:
+ break;
}
/* Final merger cleanup. */
for (i = 0; i < words; i++)
&& (i == 0 || classes[i - 1] != X86_64_SSE_CLASS))
classes[i] = X86_64_SSE_CLASS;
- /* X86_64_X87UP_CLASS should be preceeded by X86_64_X87_CLASS. */
+ /* X86_64_X87UP_CLASS should be preceeded by X86_64_X87_CLASS. */
if (classes[i] == X86_64_X87UP_CLASS
&& (i == 0 || classes[i - 1] != X86_64_X87_CLASS))
classes[i] = X86_64_SSE_CLASS;
}
case TYPE_CODE_VOID:
return 0;
+ default: /* Avoid warning. */
+ break;
}
- internal_error (__FILE__, __LINE__, "classify_argument: unknown argument type");
+ internal_error (__FILE__, __LINE__,
+ "classify_argument: unknown argument type");
}
-/* Examine the argument and return set number of register required in each
- class. Return 0 ifif parameter should be passed in memory. */
+/* Examine the argument and set *INT_NREGS and *SSE_NREGS to the
+ number of registers required based on the information passed in
+ CLASSES. Return 0 if parameter should be passed in memory. */
static int
examine_argument (enum x86_64_reg_class classes[MAX_CLASSES],
case X86_64_X87UP_CLASS:
break;
case X86_64_MEMORY_CLASS:
- internal_error (__FILE__, __LINE__, "examine_argument: unexpected memory class");
+ internal_error (__FILE__, __LINE__,
+ "examine_argument: unexpected memory class");
}
return 1;
}
#define RET_SSE_REGS 2
/* Check if the structure in value_type is returned in registers or in
- memory. If this function returns 1, gdb will call STORE_STRUCT_RETURN and
- EXTRACT_STRUCT_VALUE_ADDRESS else STORE_RETURN_VALUE and EXTRACT_RETURN_VALUE
- will be used. */
+ memory. If this function returns 1, GDB will call
+ STORE_STRUCT_RETURN and EXTRACT_STRUCT_VALUE_ADDRESS else
+ STORE_RETURN_VALUE and EXTRACT_RETURN_VALUE will be used. */
int
x86_64_use_struct_convention (int gcc_p, struct type *value_type)
{
needed_intregs > RET_INT_REGS || needed_sseregs > RET_SSE_REGS);
}
-
/* Extract from an array REGBUF containing the (raw) register state, a
function return value of TYPE, and copy that, in virtual format,
into VALBUF. */
}
}
-/* Handled by unwind informations. */
static void
x86_64_frame_init_saved_regs (struct frame_info *fi)
{
+ /* Do nothing. Everything is handled by the stack unwinding code. */
}
#define INT_REGS 6
#define SSE_REGS 16
-/* Push onto the stack the specified value VALUE. Pad it correctly for
- it to be an argument to a function. */
-
-static CORE_ADDR
-value_push (register CORE_ADDR sp, struct value *arg)
-{
- register int len = TYPE_LENGTH (VALUE_ENCLOSING_TYPE (arg));
- register int container_len = len;
-
- /* How big is the container we're going to put this value in? */
- if (PARM_BOUNDARY)
- container_len = ((len + PARM_BOUNDARY / TARGET_CHAR_BIT - 1)
- & ~(PARM_BOUNDARY / TARGET_CHAR_BIT - 1));
-
- sp -= container_len;
- write_memory (sp, VALUE_CONTENTS_ALL (arg), len);
-
- return sp;
-}
-
CORE_ADDR
x86_64_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
int struct_return, CORE_ADDR struct_addr)
int intreg = 0;
int ssereg = 0;
int i;
- static int int_parameter_registers[INT_REGS] = {5 /*RDI*/, 4 /*RSI*/,
- 1 /*RDX*/, 2 /*RCX*/,
- 8 /*R8 */, 9 /*R9 */};
+ static int int_parameter_registers[INT_REGS] = {
+ 5 /* RDI */ , 4 /* RSI */ ,
+ 3 /* RDX */ , 2 /* RCX */ ,
+ 8 /* R8 */ , 9 /* R9 */
+ };
/* XMM0 - XMM15 */
- static int sse_parameter_registers[SSE_REGS] = {34, 35, 36, 37,
- 38, 39, 40, 41,
- 42, 43, 44, 45,
- 46, 47, 48, 49};
+ static int sse_parameter_registers[SSE_REGS] = {
+ XMM1_REGNUM - 1, XMM1_REGNUM, XMM1_REGNUM + 1, XMM1_REGNUM + 2,
+ XMM1_REGNUM + 3, XMM1_REGNUM + 4, XMM1_REGNUM + 5, XMM1_REGNUM + 6,
+ XMM1_REGNUM + 7, XMM1_REGNUM + 8, XMM1_REGNUM + 9, XMM1_REGNUM + 10,
+ XMM1_REGNUM + 11, XMM1_REGNUM + 12, XMM1_REGNUM + 13, XMM1_REGNUM + 14
+ };
+ int stack_values_count = 0;
+ int *stack_values;
+ stack_values = alloca (nargs * sizeof (int));
for (i = 0; i < nargs; i++)
{
enum x86_64_reg_class class[MAX_CLASSES];
if (!n ||
!examine_argument (class, n, &needed_intregs, &needed_sseregs)
- || intreg + needed_intregs > INT_REGS
- || ssereg + needed_sseregs > SSE_REGS)
- { /* memory class */
- sp = value_push (sp, args[i]);
+ || intreg / 2 + needed_intregs > INT_REGS
+ || ssereg / 2 + needed_sseregs > SSE_REGS)
+ { /* memory class */
+ stack_values[stack_values_count++] = i;
}
else
{
case X86_64_NO_CLASS:
break;
case X86_64_INTEGER_CLASS:
- write_register_gen (int_parameter_registers[(intreg + 1) / 2],
- VALUE_CONTENTS_ALL (args[i]) + offset);
+ deprecated_write_register_gen (int_parameter_registers
+ [(intreg + 1) / 2],
+ VALUE_CONTENTS_ALL (args[i]) + offset);
offset += 8;
intreg += 2;
break;
case X86_64_INTEGERSI_CLASS:
- write_register_gen (int_parameter_registers[intreg / 2],
- VALUE_CONTENTS_ALL (args[i]) + offset);
+ deprecated_write_register_gen (int_parameter_registers[intreg / 2],
+ VALUE_CONTENTS_ALL (args[i]) + offset);
offset += 8;
intreg++;
break;
case X86_64_SSEDF_CLASS:
case X86_64_SSESF_CLASS:
case X86_64_SSE_CLASS:
- write_register_gen (sse_parameter_registers[(ssereg + 1) / 2],
- VALUE_CONTENTS_ALL (args[i]) + offset);
+ deprecated_write_register_gen (sse_parameter_registers
+ [(ssereg + 1) / 2],
+ VALUE_CONTENTS_ALL (args[i]) + offset);
offset += 8;
ssereg += 2;
break;
case X86_64_SSEUP_CLASS:
- write_register_gen (sse_parameter_registers[ssereg / 2],
- VALUE_CONTENTS_ALL (args[i]) + offset);
+ deprecated_write_register_gen (sse_parameter_registers[ssereg / 2],
+ VALUE_CONTENTS_ALL (args[i]) + offset);
offset += 8;
ssereg++;
break;
case X86_64_X87_CLASS:
- case X86_64_X87UP_CLASS:
case X86_64_MEMORY_CLASS:
- sp = value_push (sp, args[i]);
+ stack_values[stack_values_count++] = i;
+ break;
+ case X86_64_X87UP_CLASS:
break;
default:
internal_error (__FILE__, __LINE__,
}
}
}
+ while (--stack_values_count >= 0)
+ {
+ struct value *arg = args[stack_values[stack_values_count]];
+ int len = TYPE_LENGTH (VALUE_ENCLOSING_TYPE (arg));
+ len += 7;
+ len -= len % 8;
+ sp -= len;
+ write_memory (sp, VALUE_CONTENTS_ALL (arg), len);
+ }
return sp;
}
&& TARGET_LONG_DOUBLE_FORMAT == &floatformat_i387_ext)
{
/* Copy straight over. */
- write_register_bytes (REGISTER_BYTE (FP0_REGNUM), valbuf,
- FPU_REG_RAW_SIZE);
+ deprecated_write_register_bytes (REGISTER_BYTE (FP0_REGNUM), valbuf,
+ FPU_REG_RAW_SIZE);
}
else
{
it is the best we can do. */
val = extract_floating (valbuf, TYPE_LENGTH (type));
floatformat_from_doublest (&floatformat_i387_ext, &val, buf);
- write_register_bytes (REGISTER_BYTE (FP0_REGNUM), buf,
- FPU_REG_RAW_SIZE);
+ deprecated_write_register_bytes (REGISTER_BYTE (FP0_REGNUM), buf,
+ FPU_REG_RAW_SIZE);
}
}
else
int high_size = REGISTER_RAW_SIZE (1);
if (len <= low_size)
- write_register_bytes (REGISTER_BYTE (0), valbuf, len);
+ deprecated_write_register_bytes (REGISTER_BYTE (0), valbuf, len);
else if (len <= (low_size + high_size))
{
- write_register_bytes (REGISTER_BYTE (0), valbuf, low_size);
- write_register_bytes (REGISTER_BYTE (1),
- valbuf + low_size, len - low_size);
+ deprecated_write_register_bytes (REGISTER_BYTE (0), valbuf,
+ low_size);
+ deprecated_write_register_bytes (REGISTER_BYTE (1),
+ valbuf + low_size, len - low_size);
}
else
internal_error (__FILE__, __LINE__,
}
\f
-static char *
+const char *
x86_64_register_name (int reg_nr)
{
- static char *register_names[] = {
- "rax", "rdx", "rcx", "rbx",
- "rsi", "rdi", "rbp", "rsp",
- "r8", "r9", "r10", "r11",
- "r12", "r13", "r14", "r15",
- "rip", "eflags",
- "st0", "st1", "st2", "st3",
- "st4", "st5", "st6", "st7",
- "fctrl", "fstat", "ftag", "fiseg",
- "fioff", "foseg", "fooff", "fop",
- "xmm0", "xmm1", "xmm2", "xmm3",
- "xmm4", "xmm5", "xmm6", "xmm7",
- "xmm8", "xmm9", "xmm10", "xmm11",
- "xmm12", "xmm13", "xmm14", "xmm15",
- "mxcsr"
- };
- if (reg_nr < 0)
- return NULL;
- if (reg_nr >= (sizeof (register_names) / sizeof (*register_names)))
+ if (reg_nr < 0 || reg_nr >= X86_64_NUM_REGS)
return NULL;
- return register_names[reg_nr];
+ return x86_64_register_info_table[reg_nr].name;
+}
+
+int
+x86_64_register_number (const char *name)
+{
+ int reg_nr;
+
+ for (reg_nr = 0; reg_nr < X86_64_NUM_REGS; reg_nr++)
+ if (strcmp (name, x86_64_register_info_table[reg_nr].name) == 0)
+ return reg_nr;
+ return -1;
}
\f
return 0;
}
-/* On x86_64 there are no reasonable prologs. */
+/* If a function with debugging information and known beginning
+ is detected, we will return pc of the next line in the source
+ code. With this approach we effectively skip the prolog. */
+
+#define PROLOG_BUFSIZE 4
CORE_ADDR
x86_64_skip_prologue (CORE_ADDR pc)
{
+ int i;
+ struct symtab_and_line v_sal;
+ struct symbol *v_function;
+ CORE_ADDR endaddr;
+ unsigned char prolog_buf[PROLOG_BUFSIZE];
+
+ /* We will handle only functions starting with: */
+ static unsigned char prolog_expect[PROLOG_BUFSIZE] =
+ {
+ 0x55, /* pushq %rbp */
+ 0x48, 0x89, 0xe5 /* movq %rsp, %rbp */
+ };
+
+ read_memory (pc, (char *) prolog_buf, PROLOG_BUFSIZE);
+
+ /* First check, whether pc points to pushq %rbp, movq %rsp, %rbp. */
+ for (i = 0; i < PROLOG_BUFSIZE; i++)
+ if (prolog_expect[i] != prolog_buf[i])
+ return pc; /* ... no, it doesn't. Nothing to skip. */
+
+ /* OK, we have found the prologue and want PC of the first
+ non-prologue instruction. */
+ pc += PROLOG_BUFSIZE;
+
+ v_function = find_pc_function (pc);
+ v_sal = find_pc_line (pc, 0);
+
+ /* If pc doesn't point to a function with debuginfo, some of the
+ following may be NULL. */
+ if (!v_function || !v_function->ginfo.value.block || !v_sal.symtab)
+ return pc;
+
+ endaddr = BLOCK_END (SYMBOL_BLOCK_VALUE (v_function));
+
+ for (i = 0; i < v_sal.symtab->linetable->nitems; i++)
+ if (v_sal.symtab->linetable->item[i].pc >= pc
+ && v_sal.symtab->linetable->item[i].pc < endaddr)
+ {
+ pc = v_sal.symtab->linetable->item[i].pc;
+ break;
+ }
+
return pc;
}
/* Sequence of bytes for breakpoint instruction. */
-static unsigned char *
+static const unsigned char *
x86_64_breakpoint_from_pc (CORE_ADDR *pc, int *lenptr)
{
static unsigned char breakpoint[] = { 0xcc };
return breakpoint;
}
-static struct gdbarch *
-i386_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
+static void
+x86_64_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
- struct gdbarch *gdbarch;
- struct gdbarch_tdep *tdep;
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ int i, sum;
- /* Find a candidate among the list of pre-declared architectures. */
- for (arches = gdbarch_list_lookup_by_info (arches, &info);
- arches != NULL;
- arches = gdbarch_list_lookup_by_info (arches->next, &info))
- {
- switch (info.bfd_arch_info->mach)
- {
- case bfd_mach_x86_64:
- case bfd_mach_x86_64_intel_syntax:
- switch (gdbarch_bfd_arch_info (arches->gdbarch)->mach)
- {
- case bfd_mach_x86_64:
- case bfd_mach_x86_64_intel_syntax:
- return arches->gdbarch;
- case bfd_mach_i386_i386:
- case bfd_mach_i386_i8086:
- case bfd_mach_i386_i386_intel_syntax:
- break;
- default:
- internal_error (__FILE__, __LINE__,
- "i386_gdbarch_init: unknown machine type");
- }
- break;
- case bfd_mach_i386_i386:
- case bfd_mach_i386_i8086:
- case bfd_mach_i386_i386_intel_syntax:
- switch (gdbarch_bfd_arch_info (arches->gdbarch)->mach)
- {
- case bfd_mach_x86_64:
- case bfd_mach_x86_64_intel_syntax:
- break;
- case bfd_mach_i386_i386:
- case bfd_mach_i386_i8086:
- case bfd_mach_i386_i386_intel_syntax:
- return arches->gdbarch;
- default:
- internal_error (__FILE__, __LINE__,
- "i386_gdbarch_init: unknown machine type");
- }
- break;
- default:
- internal_error (__FILE__, __LINE__,
- "i386_gdbarch_init: unknown machine type");
- }
- }
-
- tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct gdbarch_tdep));
- gdbarch = gdbarch_alloc (&info, tdep);
-
- switch (info.bfd_arch_info->mach)
- {
- case bfd_mach_x86_64:
- case bfd_mach_x86_64_intel_syntax:
- tdep->num_xmm_regs = 16;
- break;
- case bfd_mach_i386_i386:
- case bfd_mach_i386_i8086:
- case bfd_mach_i386_i386_intel_syntax:
- /* This is place for definition of i386 target vector. */
- break;
- default:
- internal_error (__FILE__, __LINE__,
- "i386_gdbarch_init: unknown machine type");
- }
+ /* The x86-64 has 16 SSE registers. */
+ tdep->num_xmm_regs = 16;
+ /* This is what all the fuss is about. */
set_gdbarch_long_bit (gdbarch, 64);
set_gdbarch_long_long_bit (gdbarch, 64);
set_gdbarch_ptr_bit (gdbarch, 64);
- set_gdbarch_long_double_format (gdbarch, &floatformat_i387_ext);
- set_gdbarch_ieee_float (gdbarch, 1);
-
+ /* In contrast to the i386, on the x86-64 a `long double' actually
+ takes up 128 bits, even though it's still based on the i387
+ extended floating-point format which has only 80 significant bits. */
+ set_gdbarch_long_double_bit (gdbarch, 128);
set_gdbarch_num_regs (gdbarch, X86_64_NUM_REGS);
+
+ /* Register numbers of various important registers. */
+ set_gdbarch_sp_regnum (gdbarch, 7); /* %rsp */
+ set_gdbarch_fp_regnum (gdbarch, 6); /* %rbp */
+ set_gdbarch_pc_regnum (gdbarch, 16); /* %rip */
+ set_gdbarch_ps_regnum (gdbarch, 17); /* %eflags */
+ set_gdbarch_fp0_regnum (gdbarch, X86_64_NUM_GREGS); /* %st(0) */
+
+ /* The "default" register numbering scheme for the x86-64 is
+ referred to as the "DWARF register number mapping" in the psABI.
+ The preferred debugging format for all known x86-64 targets is
+ actually DWARF2, and GCC doesn't seem to support DWARF (that is
+ DWARF-1), but we provide the same mapping just in case. This
+ mapping is also used for stabs, which GCC does support. */
+ set_gdbarch_stab_reg_to_regnum (gdbarch, x86_64_dwarf2_reg_to_regnum);
+ set_gdbarch_dwarf_reg_to_regnum (gdbarch, x86_64_dwarf2_reg_to_regnum);
+ set_gdbarch_dwarf2_reg_to_regnum (gdbarch, x86_64_dwarf2_reg_to_regnum);
+
+ /* We don't override SDB_REG_RO_REGNUM, sice COFF doesn't seem to be
+ in use on any of the supported x86-64 targets. */
+
set_gdbarch_register_name (gdbarch, x86_64_register_name);
set_gdbarch_register_size (gdbarch, 8);
+
+ /* Total amount of space needed to store our copies of the machine's
+ register (SIZEOF_GREGS + SIZEOF_FPU_REGS + SIZEOF_FPU_CTRL_REGS +
+ SIZEOF_SSE_REGS) */
+ for (i = 0, sum = 0; i < X86_64_NUM_REGS; i++)
+ sum += x86_64_register_info_table[i].size;
+ set_gdbarch_register_bytes (gdbarch, sum);
+
set_gdbarch_register_raw_size (gdbarch, x86_64_register_raw_size);
- set_gdbarch_max_register_raw_size (gdbarch, 16);
set_gdbarch_register_byte (gdbarch, x86_64_register_byte);
- /* Total amount of space needed to store our copies of the machine's register
- (SIZEOF_GREGS + SIZEOF_FPU_REGS + SIZEOF_FPU_CTRL_REGS + SIZEOF_SSE_REGS) */
- set_gdbarch_register_bytes (gdbarch,
- (18 * 8) + (8 * 10) + (8 * 4) + (8 * 16 + 4));
- set_gdbarch_register_virtual_size (gdbarch, generic_register_virtual_size);
- set_gdbarch_max_register_virtual_size (gdbarch, 16);
-
set_gdbarch_register_virtual_type (gdbarch, x86_64_register_virtual_type);
+ /* FIXME: kettenis/20021026: As long as we don't support longjmp,
+ that is, as long as we have `tdep->jb_pc_offset == -1', using
+ i386_get_longjmp_target is fine. */
+
set_gdbarch_register_convertible (gdbarch, x86_64_register_convertible);
set_gdbarch_register_convert_to_virtual (gdbarch,
x86_64_register_convert_to_virtual);
set_gdbarch_register_convert_to_raw (gdbarch,
x86_64_register_convert_to_raw);
-/* Register numbers of various important registers. */
- set_gdbarch_sp_regnum (gdbarch, 7); /* (rsp) Contains address of top of stack. */
- set_gdbarch_fp_regnum (gdbarch, 6); /* (rbp) */
- set_gdbarch_pc_regnum (gdbarch, 16); /* (rip) Contains program counter. */
-
- set_gdbarch_fp0_regnum (gdbarch, 18); /* First FPU floating-point register. */
+ /* Getting saved registers is handled by unwind information. */
+ set_gdbarch_get_saved_register (gdbarch, cfi_get_saved_register);
+ /* FIXME: kettenis/20021026: Should we set parm_boundary to 64 here? */
set_gdbarch_read_fp (gdbarch, cfi_read_fp);
- set_gdbarch_write_fp (gdbarch, cfi_write_fp);
-/* Discard from the stack the innermost frame, restoring all registers. */
+ /* FIXME: kettenis/20021026: Should be undeprecated. */
+ set_gdbarch_extract_return_value (gdbarch, NULL);
+ set_gdbarch_deprecated_extract_return_value (gdbarch,
+ x86_64_extract_return_value);
+ set_gdbarch_push_arguments (gdbarch, x86_64_push_arguments);
+ set_gdbarch_push_return_address (gdbarch, x86_64_push_return_address);
set_gdbarch_pop_frame (gdbarch, x86_64_pop_frame);
+ set_gdbarch_store_struct_return (gdbarch, x86_64_store_struct_return);
+ /* FIXME: kettenis/20021026: Should be undeprecated. */
+ set_gdbarch_store_return_value (gdbarch, NULL);
+ set_gdbarch_deprecated_store_return_value (gdbarch,
+ x86_64_store_return_value);
+ /* Override, since this is handled by x86_64_extract_return_value. */
+ set_gdbarch_extract_struct_value_address (gdbarch, NULL);
+ set_gdbarch_use_struct_convention (gdbarch, x86_64_use_struct_convention);
- /* FRAME_CHAIN takes a frame's nominal address and produces the frame's
- chain-pointer. */
- set_gdbarch_frame_chain (gdbarch, cfi_frame_chain);
+ set_gdbarch_frame_init_saved_regs (gdbarch, x86_64_frame_init_saved_regs);
+ set_gdbarch_skip_prologue (gdbarch, x86_64_skip_prologue);
+ set_gdbarch_frame_chain (gdbarch, x86_64_linux_frame_chain);
set_gdbarch_frameless_function_invocation (gdbarch,
- x86_64_frameless_function_invocation);
+ x86_64_frameless_function_invocation);
+ /* FIXME: kettenis/20021025: Shouldn't this be set to
+ generic_file_frame_chain_valid? */
+ set_gdbarch_frame_chain_valid (gdbarch, file_frame_chain_valid);
+ /* FIXME: kettenis/20021026: These two are GNU/Linux-specific and
+ should be moved elsewhere. */
set_gdbarch_frame_saved_pc (gdbarch, x86_64_linux_frame_saved_pc);
+ set_gdbarch_saved_pc_after_call (gdbarch, x86_64_linux_saved_pc_after_call);
+ set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown);
+ /* FIXME: kettenis/20021026: This one is GNU/Linux-specific too. */
+ set_gdbarch_pc_in_sigtramp (gdbarch, x86_64_linux_in_sigtramp);
- set_gdbarch_frame_args_address (gdbarch, default_frame_address);
- set_gdbarch_frame_locals_address (gdbarch, default_frame_address);
-
-/* Return number of bytes at start of arglist that are not really args. */
- set_gdbarch_frame_args_skip (gdbarch, 8);
-
- set_gdbarch_frame_init_saved_regs (gdbarch, x86_64_frame_init_saved_regs);
-
-/* Frame pc initialization is handled by unwind informations. */
- set_gdbarch_init_frame_pc (gdbarch, cfi_init_frame_pc);
+ /* Build call frame information (CFI) from DWARF2 frame debug info. */
+ set_gdbarch_dwarf2_build_frame_info (gdbarch, dwarf2_build_frame_info);
-/* Initialization of unwind informations. */
+ /* Initialization of per-frame CFI. */
set_gdbarch_init_extra_frame_info (gdbarch, cfi_init_extra_frame_info);
-/* Getting saved registers is handled by unwind informations. */
- set_gdbarch_get_saved_register (gdbarch, cfi_get_saved_register);
-
- set_gdbarch_frame_init_saved_regs (gdbarch, x86_64_frame_init_saved_regs);
+ /* Frame PC initialization is handled by using CFI. */
+ set_gdbarch_deprecated_init_frame_pc (gdbarch, x86_64_init_frame_pc);
-/* Cons up virtual frame pointer for trace */
+ /* Cons up virtual frame pointer for trace. */
set_gdbarch_virtual_frame_pointer (gdbarch, cfi_virtual_frame_pointer);
+ /* FIXME: kettenis/20021026: This is ELF-specific. Fine for now,
+ since all supported x86-64 targets are ELF, but that might change
+ in the future. */
+ set_gdbarch_in_solib_call_trampoline (gdbarch, in_plt_section);
+}
- set_gdbarch_frame_chain_valid (gdbarch, generic_file_frame_chain_valid);
+static struct gdbarch *
+x86_64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
+{
+ struct gdbarch_tdep *tdep;
+ struct gdbarch *gdbarch;
+ enum gdb_osabi osabi = GDB_OSABI_UNKNOWN;
- set_gdbarch_use_generic_dummy_frames (gdbarch, 1);
- set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT);
- set_gdbarch_call_dummy_address (gdbarch, entry_point_address);
- set_gdbarch_call_dummy_length (gdbarch, 0);
- set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0);
- set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1);
- set_gdbarch_pc_in_call_dummy (gdbarch, pc_in_call_dummy_at_entry_point);
- set_gdbarch_call_dummy_words (gdbarch, 0);
- set_gdbarch_sizeof_call_dummy_words (gdbarch, 0);
- set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
- set_gdbarch_call_dummy_p (gdbarch, 1);
- set_gdbarch_call_dummy_start_offset (gdbarch, 0);
- set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame);
- set_gdbarch_fix_call_dummy (gdbarch, generic_fix_call_dummy);
- set_gdbarch_push_return_address (gdbarch, x86_64_push_return_address);
- set_gdbarch_push_arguments (gdbarch, x86_64_push_arguments);
+ /* Try to determine the OS ABI of the object we're loading. */
+ if (info.abfd != NULL)
+ osabi = gdbarch_lookup_osabi (info.abfd);
-/* Return number of args passed to a frame, no way to tell. */
- set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown);
-/* Don't use default structure extract routine */
- set_gdbarch_extract_struct_value_address (gdbarch, 0);
+ /* Find a candidate among extant architectures. */
+ for (arches = gdbarch_list_lookup_by_info (arches, &info);
+ arches != NULL;
+ arches = gdbarch_list_lookup_by_info (arches->next, &info))
+ {
+ /* Make sure the OS ABI selection matches. */
+ tdep = gdbarch_tdep (arches->gdbarch);
+ if (tdep && tdep->osabi == osabi)
+ return arches->gdbarch;
+ }
-/* If USE_STRUCT_CONVENTION retruns 0, then gdb uses STORE_RETURN_VALUE
- and EXTRACT_RETURN_VALUE to store/fetch the functions return value. It is
- the case when structure is returned in registers. */
- set_gdbarch_use_struct_convention (gdbarch, x86_64_use_struct_convention);
+ /* Allocate space for the new architecture. */
+ tdep = XMALLOC (struct gdbarch_tdep);
+ gdbarch = gdbarch_alloc (&info, tdep);
-/* Store the address of the place in which to copy the structure the
- subroutine will return. This is called from call_function. */
- set_gdbarch_store_struct_return (gdbarch, x86_64_store_struct_return);
+ tdep->osabi = osabi;
-/* Extract from an array REGBUF containing the (raw) register state
- a function return value of type TYPE, and copy that, in virtual format,
- into VALBUF. */
- set_gdbarch_extract_return_value (gdbarch, x86_64_extract_return_value);
+ /* FIXME: kettenis/20021025: The following calls are going to
+ disappear when we integrate the x86_64 target into the i386
+ target. */
+ set_gdbarch_long_double_format (gdbarch, &floatformat_i387_ext);
-/* Write into the appropriate registers a function return value stored
- in VALBUF of type TYPE, given in virtual format. */
- set_gdbarch_store_return_value (gdbarch, x86_64_store_return_value);
-\f
+ set_gdbarch_max_register_raw_size (gdbarch, 16);
+ set_gdbarch_max_register_virtual_size (gdbarch, 16);
+
+ set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
-/* Offset from address of function to start of its code. */
+ set_gdbarch_breakpoint_from_pc (gdbarch, x86_64_breakpoint_from_pc);
+ set_gdbarch_decr_pc_after_break (gdbarch, 1);
set_gdbarch_function_start_offset (gdbarch, 0);
- set_gdbarch_skip_prologue (gdbarch, x86_64_skip_prologue);
+ set_gdbarch_frame_args_skip (gdbarch, 8);
- set_gdbarch_saved_pc_after_call (gdbarch, x86_64_linux_saved_pc_after_call);
+ set_gdbarch_call_dummy_address (gdbarch, entry_point_address);
+ set_gdbarch_call_dummy_start_offset (gdbarch, 0);
+ set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0);
+ set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1);
+ set_gdbarch_call_dummy_length (gdbarch, 0);
+ set_gdbarch_call_dummy_p (gdbarch, 1);
+ set_gdbarch_call_dummy_words (gdbarch, NULL);
+ set_gdbarch_sizeof_call_dummy_words (gdbarch, 0);
+ set_gdbarch_fix_call_dummy (gdbarch, generic_fix_call_dummy);
+ set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
- set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
+ set_gdbarch_deprecated_pc_in_call_dummy (gdbarch, deprecated_pc_in_call_dummy_at_entry_point);
- set_gdbarch_breakpoint_from_pc (gdbarch, x86_64_breakpoint_from_pc);
+ set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame);
+ /* FIXME: kettenis/20021025: These already are the default. */
-/* Amount PC must be decremented by after a breakpoint. This is often the
- number of bytes in BREAKPOINT but not always. */
- set_gdbarch_decr_pc_after_break (gdbarch, 1);
+ set_gdbarch_register_virtual_size (gdbarch, generic_register_size);
+ set_gdbarch_deprecated_extract_struct_value_address (gdbarch, 0);
+
+ x86_64_init_abi (info, gdbarch);
-/* Use dwarf2 debug frame informations. */
- set_gdbarch_dwarf2_build_frame_info (gdbarch, dwarf2_build_frame_info);
return gdbarch;
}
void
_initialize_x86_64_tdep (void)
{
- register_gdbarch_init (bfd_arch_i386, i386_gdbarch_init);
+ register_gdbarch_init (bfd_arch_i386, x86_64_gdbarch_init);
/* Initialize the table saying where each register starts in the
register file. */
for (i = 0; i < X86_64_NUM_REGS; i++)
{
x86_64_register_byte_table[i] = offset;
- offset += x86_64_register_raw_size_table[i];
+ offset += x86_64_register_info_table[i].size;
}
}
tm_print_insn = gdb_print_insn_x86_64;
- tm_print_insn_info.mach = bfd_lookup_arch (bfd_arch_i386, 3)->mach;
+ tm_print_insn_info.mach = bfd_mach_x86_64;
/* Add the variable that controls the disassembly flavour. */
{
projects / deliverable / binutils-gdb.git / blobdiff