/* Target-dependent code for the x86-64 for GDB, the GNU debugger.
- Copyright 2001, 2002 Free Software Foundation, Inc.
-
+ Copyright 2001, 2002, 2003 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 "gdb_assert.h"
+#include "block.h"
/* Register numbers of various important registers. */
#define RAX_REGNUM 0
#define RDX_REGNUM 3
#define RDI_REGNUM 5
#define EFLAGS_REGNUM 17
+#define ST0_REGNUM 22
#define XMM1_REGNUM 39
struct register_info
/* x86_64_register_raw_size_table[i] is the number of bytes of storage in
GDB's register array occupied by register i. */
static struct register_info x86_64_register_info_table[] = {
- {8, "rax", &builtin_type_int64},
- {8, "rbx", &builtin_type_int64},
- {8, "rcx", &builtin_type_int64},
- {8, "rdx", &builtin_type_int64},
- {8, "rsi", &builtin_type_int64},
- {8, "rdi", &builtin_type_int64},
- {8, "rbp", &builtin_type_void_func_ptr},
- {8, "rsp", &builtin_type_void_func_ptr},
- {8, "r8", &builtin_type_int64},
- {8, "r9", &builtin_type_int64},
- {8, "r10", &builtin_type_int64},
- {8, "r11", &builtin_type_int64},
- {8, "r12", &builtin_type_int64},
- {8, "r13", &builtin_type_int64},
- {8, "r14", &builtin_type_int64},
- {8, "r15", &builtin_type_int64},
- {8, "rip", &builtin_type_void_func_ptr},
- {4, "eflags", &builtin_type_int32},
- {4, "ds", &builtin_type_int32},
- {4, "es", &builtin_type_int32},
- {4, "fs", &builtin_type_int32},
- {4, "gs", &builtin_type_int32},
- {10, "st0", &builtin_type_i387_ext},
- {10, "st1", &builtin_type_i387_ext},
- {10, "st2", &builtin_type_i387_ext},
- {10, "st3", &builtin_type_i387_ext},
- {10, "st4", &builtin_type_i387_ext},
- {10, "st5", &builtin_type_i387_ext},
- {10, "st6", &builtin_type_i387_ext},
- {10, "st7", &builtin_type_i387_ext},
- {4, "fctrl", &builtin_type_int32},
- {4, "fstat", &builtin_type_int32},
- {4, "ftag", &builtin_type_int32},
- {4, "fiseg", &builtin_type_int32},
- {4, "fioff", &builtin_type_int32},
- {4, "foseg", &builtin_type_int32},
- {4, "fooff", &builtin_type_int32},
- {4, "fop", &builtin_type_int32},
- {16, "xmm0", &builtin_type_v4sf},
- {16, "xmm1", &builtin_type_v4sf},
- {16, "xmm2", &builtin_type_v4sf},
- {16, "xmm3", &builtin_type_v4sf},
- {16, "xmm4", &builtin_type_v4sf},
- {16, "xmm5", &builtin_type_v4sf},
- {16, "xmm6", &builtin_type_v4sf},
- {16, "xmm7", &builtin_type_v4sf},
- {16, "xmm8", &builtin_type_v4sf},
- {16, "xmm9", &builtin_type_v4sf},
- {16, "xmm10", &builtin_type_v4sf},
- {16, "xmm11", &builtin_type_v4sf},
- {16, "xmm12", &builtin_type_v4sf},
- {16, "xmm13", &builtin_type_v4sf},
- {16, "xmm14", &builtin_type_v4sf},
- {16, "xmm15", &builtin_type_v4sf},
- {4, "mxcsr", &builtin_type_int32}
+ /* 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]))
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
char *from, char *to)
{
char buf[12];
- DOUBLEST d;
+
/* We only support floating-point values. */
if (TYPE_CODE (type) != TYPE_CODE_FLT)
{
memcpy (to, from, FPU_REG_RAW_SIZE);
}
+/* 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 att_flavour[] = "att";
};
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;
return 2;
}
break;
+ case TYPE_CODE_ENUM:
+ case TYPE_CODE_REF:
case TYPE_CODE_INT:
case TYPE_CODE_PTR:
switch (bytes)
}
case TYPE_CODE_VOID:
return 0;
+ default: /* Avoid warning. */
+ break;
}
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],
#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. */
void
-x86_64_extract_return_value (struct type *type, char *regbuf, char *valbuf)
+x86_64_extract_return_value (struct type *type, struct regcache *regcache,
+ void *valbuf)
{
enum x86_64_reg_class class[MAX_CLASSES];
int n = classify_argument (type, class, 0);
needed_intregs > RET_INT_REGS || needed_sseregs > RET_SSE_REGS)
{ /* memory class */
CORE_ADDR addr;
- memcpy (&addr, regbuf, REGISTER_RAW_SIZE (RAX_REGNUM));
+ regcache_cooked_read (regcache, RAX_REGNUM, &addr);
read_memory (addr, valbuf, TYPE_LENGTH (type));
return;
}
case X86_64_NO_CLASS:
break;
case X86_64_INTEGER_CLASS:
- memcpy (valbuf + offset,
- regbuf + REGISTER_BYTE (ret_int_r[(intreg + 1) / 2]),
- 8);
+ regcache_cooked_read (regcache, ret_int_r[(intreg + 1) / 2],
+ (char *) valbuf + offset);
offset += 8;
intreg += 2;
break;
case X86_64_INTEGERSI_CLASS:
- memcpy (valbuf + offset,
- regbuf + REGISTER_BYTE (ret_int_r[intreg / 2]), 4);
+ regcache_cooked_read_part (regcache, ret_int_r[intreg / 2],
+ 0, 4, (char *) valbuf + offset);
offset += 8;
intreg++;
break;
case X86_64_SSEDF_CLASS:
case X86_64_SSESF_CLASS:
case X86_64_SSE_CLASS:
- memcpy (valbuf + offset,
- regbuf + REGISTER_BYTE (ret_sse_r[(ssereg + 1) / 2]),
- 8);
+ regcache_cooked_read_part (regcache,
+ ret_sse_r[(ssereg + 1) / 2], 0, 8,
+ (char *) valbuf + offset);
offset += 8;
ssereg += 2;
break;
case X86_64_SSEUP_CLASS:
- memcpy (valbuf + offset + 8,
- regbuf + REGISTER_BYTE (ret_sse_r[ssereg / 2]), 8);
+ regcache_cooked_read_part (regcache, ret_sse_r[ssereg / 2],
+ 0, 8, (char *) valbuf + offset);
offset += 8;
ssereg++;
break;
case X86_64_X87_CLASS:
- memcpy (valbuf + offset, regbuf + REGISTER_BYTE (FP0_REGNUM),
- 8);
+ regcache_cooked_read_part (regcache, FP0_REGNUM,
+ 0, 8, (char *) valbuf + offset);
offset += 8;
break;
case X86_64_X87UP_CLASS:
- memcpy (valbuf + offset,
- regbuf + REGISTER_BYTE (FP0_REGNUM) + 8, 8);
+ regcache_cooked_read_part (regcache, FP0_REGNUM,
+ 8, 2, (char *) valbuf + offset);
offset += 8;
break;
case X86_64_MEMORY_CLASS:
}
}
-/* 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
static int int_parameter_registers[INT_REGS] = {
5 /* RDI */ , 4 /* RSI */ ,
3 /* RDX */ , 2 /* RCX */ ,
- 8 /* R8 */ , 9 /* R9 */
+ 8 /* R8 */ , 9 /* R9 */
};
/* XMM0 - XMM15 */
static int sse_parameter_registers[SSE_REGS] = {
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);
- offset += 8;
- intreg++;
- break;
+ {
+ LONGEST num
+ = extract_signed_integer (VALUE_CONTENTS_ALL (args[i])
+ + offset, 4);
+ regcache_raw_write_signed (current_regcache,
+ int_parameter_registers[intreg / 2], num);
+
+ 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;
/* Write into the appropriate registers a function return value stored
in VALBUF of type TYPE, given in virtual format. */
void
-x86_64_store_return_value (struct type *type, char *valbuf)
+x86_64_store_return_value (struct type *type, struct regcache *regcache,
+ const void *valbuf)
{
int len = TYPE_LENGTH (type);
&& TARGET_LONG_DOUBLE_FORMAT == &floatformat_i387_ext)
{
/* Copy straight over. */
- write_register_bytes (REGISTER_BYTE (FP0_REGNUM), valbuf,
- FPU_REG_RAW_SIZE);
+ regcache_cooked_write (regcache, FP0_REGNUM, valbuf);
}
else
{
floating point format used by the FPU. This is probably
not exactly how it would happen on the target itself, but
it is the best we can do. */
- val = extract_floating (valbuf, TYPE_LENGTH (type));
+ val = deprecated_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);
+ regcache_cooked_write_part (regcache, FP0_REGNUM,
+ 0, FPU_REG_RAW_SIZE, buf);
}
}
else
int high_size = REGISTER_RAW_SIZE (1);
if (len <= low_size)
- write_register_bytes (REGISTER_BYTE (0), valbuf, len);
+ regcache_cooked_write_part (regcache, 0, 0, len, valbuf);
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);
+ regcache_cooked_write_part (regcache, 0, 0, low_size, valbuf);
+ regcache_cooked_write_part (regcache, 1, 0,
+ len - low_size,
+ (const char *) valbuf + low_size);
}
else
internal_error (__FILE__, __LINE__,
}
\f
-static char *
+const char *
x86_64_register_name (int reg_nr)
{
if (reg_nr < 0 || reg_nr >= X86_64_NUM_REGS)
return NULL;
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;
}
+/* We will handle only functions beginning with:
+ 55 pushq %rbp
+ 48 89 e5 movq %rsp,%rbp
+ Any function that doesn't start with this sequence
+ will be assumed to have no prologue and thus no valid
+ frame pointer in %rbp. */
+#define PROLOG_BUFSIZE 4
+int
+x86_64_function_has_prologue (CORE_ADDR pc)
+{
+ int i;
+ unsigned char prolog_expect[PROLOG_BUFSIZE] = { 0x55, 0x48, 0x89, 0xe5 },
+ prolog_buf[PROLOG_BUFSIZE];
+
+ 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 0; /* ... no, it doesn't. Nothing to skip. */
+
+ return 1;
+}
+
/* 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, firstline, currline;
+ int i;
struct symtab_and_line v_sal;
struct symbol *v_function;
- CORE_ADDR salendaddr = 0, endaddr = 0;
-
- /* We will handle only functions beginning with:
- 55 pushq %rbp
- 48 89 e5 movq %rsp,%rbp
- */
- unsigned char prolog_expect[PROLOG_BUFSIZE] = { 0x55, 0x48, 0x89, 0xe5 },
- prolog_buf[PROLOG_BUFSIZE];
+ CORE_ADDR endaddr;
- read_memory (pc, (char *) prolog_buf, PROLOG_BUFSIZE);
+ if (! x86_64_function_has_prologue (pc))
+ return pc;
- /* 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;
+ /* 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 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;
- firstline = v_sal.line;
- currline = firstline;
- salendaddr = v_sal.end;
- endaddr = v_function->ginfo.value.block->endaddr;
+ 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].line > firstline
- && v_sal.symtab->linetable->item[i].pc >= salendaddr
+ 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;
- currline = v_sal.symtab->linetable->item[i].line;
break;
}
}
/* Sequence of bytes for breakpoint instruction. */
-static unsigned char *
-x86_64_breakpoint_from_pc (CORE_ADDR * pc, int *lenptr)
+static const unsigned char *
+x86_64_breakpoint_from_pc (CORE_ADDR *pc, int *lenptr)
{
static unsigned char breakpoint[] = { 0xcc };
*lenptr = 1;
return breakpoint;
}
-static struct gdbarch *
-i386_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
+static void
+x86_64_save_dummy_frame_tos (CORE_ADDR sp)
{
- struct gdbarch *gdbarch;
- struct gdbarch_tdep *tdep;
- int i, sum;
+ /* We must add the size of the return address that is already
+ put on the stack. */
+ generic_save_dummy_frame_tos (sp +
+ TYPE_LENGTH (builtin_type_void_func_ptr));
+}
- /* 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");
- }
- }
+static struct frame_id
+x86_64_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *frame)
+{
+ CORE_ADDR base;
+ frame_unwind_unsigned_register (frame, SP_REGNUM, &base);
+ return frame_id_build (base, frame_pc_unwind (frame));
+}
- tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct gdbarch_tdep));
- gdbarch = gdbarch_alloc (&info, tdep);
+void
+x86_64_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ int i, sum;
- 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);
+ /* 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);
- 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) */
+ /* 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_virtual_size (gdbarch, generic_register_virtual_size);
- set_gdbarch_max_register_virtual_size (gdbarch, 16);
+ set_gdbarch_register_raw_size (gdbarch, x86_64_register_raw_size);
+ set_gdbarch_register_byte (gdbarch, x86_64_register_byte);
set_gdbarch_register_virtual_type (gdbarch, x86_64_register_virtual_type);
set_gdbarch_register_convertible (gdbarch, x86_64_register_convertible);
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, X86_64_NUM_GREGS); /* First FPU floating-point register. */
+ /* Getting saved registers is handled by unwind information. */
+ set_gdbarch_deprecated_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. */
- set_gdbarch_pop_frame (gdbarch, x86_64_pop_frame);
-
- /* 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_frameless_function_invocation (gdbarch,
- x86_64_frameless_function_invocation);
- set_gdbarch_frame_saved_pc (gdbarch, x86_64_linux_frame_saved_pc);
-
- 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);
-
-/* Initialization of unwind informations. */
- 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);
-
-/* Cons up virtual frame pointer for trace */
- set_gdbarch_virtual_frame_pointer (gdbarch, cfi_virtual_frame_pointer);
-
-
- set_gdbarch_frame_chain_valid (gdbarch, generic_file_frame_chain_valid);
-
- 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);
-
-/* 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);
-
-/* 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);
-
-/* 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);
-
-/* 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);
-
-/* Write into the appropriate registers a function return value stored
- in VALBUF of type TYPE, given in virtual format. */
+ set_gdbarch_deprecated_push_arguments (gdbarch, x86_64_push_arguments);
+ set_gdbarch_deprecated_push_return_address (gdbarch, x86_64_push_return_address);
+ set_gdbarch_deprecated_pop_frame (gdbarch, x86_64_pop_frame);
+ set_gdbarch_deprecated_store_struct_return (gdbarch, x86_64_store_struct_return);
set_gdbarch_store_return_value (gdbarch, x86_64_store_return_value);
-\f
-
-/* Offset from address of function to start of its code. */
- set_gdbarch_function_start_offset (gdbarch, 0);
+ /* 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);
+ set_gdbarch_deprecated_frame_init_saved_regs (gdbarch, x86_64_frame_init_saved_regs);
set_gdbarch_skip_prologue (gdbarch, x86_64_skip_prologue);
+ set_gdbarch_deprecated_frame_chain (gdbarch, x86_64_linux_frame_chain);
+ set_gdbarch_frameless_function_invocation (gdbarch,
+ x86_64_frameless_function_invocation);
+ /* FIXME: kettenis/20021026: These two are GNU/Linux-specific and
+ should be moved elsewhere. */
+ set_gdbarch_deprecated_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_inner_than (gdbarch, core_addr_lessthan);
+ set_gdbarch_num_pseudo_regs (gdbarch, 0);
- set_gdbarch_breakpoint_from_pc (gdbarch, x86_64_breakpoint_from_pc);
+ /* Build call frame information (CFI) from DWARF2 frame debug info. */
+ set_gdbarch_dwarf2_build_frame_info (gdbarch, dwarf2_build_frame_info);
+ /* Initialization of per-frame CFI. */
+ set_gdbarch_deprecated_init_extra_frame_info (gdbarch, cfi_init_extra_frame_info);
-/* 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);
+ /* Frame PC initialization is handled by using CFI. */
+ set_gdbarch_deprecated_init_frame_pc (gdbarch, x86_64_init_frame_pc);
-/* Use dwarf2 debug frame informations. */
- set_gdbarch_dwarf2_build_frame_info (gdbarch, dwarf2_build_frame_info);
- return gdbarch;
+ /* 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);
+
+ /* Dummy frame helper functions. */
+ set_gdbarch_save_dummy_frame_tos (gdbarch, x86_64_save_dummy_frame_tos);
+ set_gdbarch_unwind_dummy_id (gdbarch, x86_64_unwind_dummy_id);
}
void
_initialize_x86_64_tdep (void)
{
- register_gdbarch_init (bfd_arch_i386, i386_gdbarch_init);
-
/* Initialize the table saying where each register starts in the
register file. */
{
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;
-
- /* Add the variable that controls the disassembly flavour. */
- {
- struct cmd_list_element *new_cmd;
-
- new_cmd = add_set_enum_cmd ("disassembly-flavour", no_class,
- valid_flavours, &disassembly_flavour, "\
-Set the disassembly flavour, the valid values are \"att\" and \"intel\", \
-and the default value is \"att\".", &setlist);
- add_show_from_set (new_cmd, &showlist);
- }
}
projects / deliverable / binutils-gdb.git / blobdiff