/* Intel 386 target-dependent stuff.
Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
- 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software
- Foundation, Inc.
+ 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
+ Free Software Foundation, Inc.
This file is part of GDB.
/* Saved registers. */
CORE_ADDR saved_regs[I386_NUM_SAVED_REGS];
CORE_ADDR saved_sp;
+ int stack_align;
int pc_in_eax;
/* Stack space reserved for local variables. */
for (i = 0; i < I386_NUM_SAVED_REGS; i++)
cache->saved_regs[i] = -1;
cache->saved_sp = 0;
+ cache->stack_align = 0;
cache->pc_in_eax = 0;
/* Frameless until proven otherwise. */
return pc;
}
+/* GCC 4.1 and later, can put code in the prologue to realign the
+ stack pointer. Check whether PC points to such code, and update
+ CACHE accordingly. Return the first instruction after the code
+ sequence or CURRENT_PC, whichever is smaller. If we don't
+ recognize the code, return PC. */
+
+static CORE_ADDR
+i386_analyze_stack_align (CORE_ADDR pc, CORE_ADDR current_pc,
+ struct i386_frame_cache *cache)
+{
+ static const gdb_byte insns[10] = {
+ 0x8d, 0x4c, 0x24, 0x04, /* leal 4(%esp), %ecx */
+ 0x83, 0xe4, 0xf0, /* andl $-16, %esp */
+ 0xff, 0x71, 0xfc /* pushl -4(%ecx) */
+ };
+ gdb_byte buf[10];
+
+ if (target_read_memory (pc, buf, sizeof buf)
+ || memcmp (buf, insns, sizeof buf) != 0)
+ return pc;
+
+ if (current_pc > pc + 4)
+ cache->stack_align = 1;
+
+ return min (pc + 10, current_pc);
+}
+
/* Maximum instruction length we need to handle. */
#define I386_MAX_INSN_LEN 6
pc = i386_follow_jump (pc);
pc = i386_analyze_struct_return (pc, current_pc, cache);
pc = i386_skip_probe (pc);
+ pc = i386_analyze_stack_align (pc, current_pc, cache);
pc = i386_analyze_frame_setup (pc, current_pc, cache);
return i386_analyze_register_saves (pc, current_pc, cache);
}
if (cache->pc != 0)
i386_analyze_prologue (cache->pc, frame_pc_unwind (next_frame), cache);
+ if (cache->stack_align)
+ {
+ /* Saved stack pointer has been saved in %ecx. */
+ frame_unwind_register (next_frame, I386_ECX_REGNUM, buf);
+ cache->saved_sp = extract_unsigned_integer(buf, 4);
+ }
+
if (cache->locals < 0)
{
/* We didn't find a valid frame, which means that CACHE->base
frame by looking at the stack pointer. For truly "frameless"
functions this might work too. */
- frame_unwind_register (next_frame, I386_ESP_REGNUM, buf);
- cache->base = extract_unsigned_integer (buf, 4) + cache->sp_offset;
+ if (cache->stack_align)
+ {
+ /* We're halfway aligning the stack. */
+ cache->base = ((cache->saved_sp - 4) & 0xfffffff0) - 4;
+ cache->saved_regs[I386_EIP_REGNUM] = cache->saved_sp - 4;
+
+ /* This will be added back below. */
+ cache->saved_regs[I386_EIP_REGNUM] -= cache->base;
+ }
+ else
+ {
+ frame_unwind_register (next_frame, I386_ESP_REGNUM, buf);
+ cache->base = extract_unsigned_integer (buf, 4) + cache->sp_offset;
+ }
}
/* Now that we have the base address for the stack frame we can
calculate the value of %esp in the calling frame. */
- cache->saved_sp = cache->base + 8;
+ if (cache->saved_sp == 0)
+ cache->saved_sp = cache->base + 8;
/* Adjust all the saved registers such that they contain addresses
instead of offsets. */
multiple of [32-bit] words. This may require tail padding,
depending on the size of the argument."
- This makes sure the stack says word-aligned. */
+ This makes sure the stack stays word-aligned. */
sp -= (len + 3) & ~3;
write_memory (sp, value_contents_all (args[i]), len);
}
}
\f
+/* Type for %eflags. */
+struct type *i386_eflags_type;
+
/* Types for the MMX and SSE registers. */
-static struct type *i386_mmx_type;
-static struct type *i386_sse_type;
+struct type *i386_mmx_type;
+struct type *i386_sse_type;
+struct type *i386_mxcsr_type;
+
+/* Construct types for ISA-specific registers. */
+static void
+i386_init_types (void)
+{
+ struct type *type;
+
+ type = init_flags_type ("builtin_type_i386_eflags", 4);
+ append_flags_type_flag (type, 0, "CF");
+ append_flags_type_flag (type, 1, NULL);
+ append_flags_type_flag (type, 2, "PF");
+ append_flags_type_flag (type, 4, "AF");
+ append_flags_type_flag (type, 6, "ZF");
+ append_flags_type_flag (type, 7, "SF");
+ append_flags_type_flag (type, 8, "TF");
+ append_flags_type_flag (type, 9, "IF");
+ append_flags_type_flag (type, 10, "DF");
+ append_flags_type_flag (type, 11, "OF");
+ append_flags_type_flag (type, 14, "NT");
+ append_flags_type_flag (type, 16, "RF");
+ append_flags_type_flag (type, 17, "VM");
+ append_flags_type_flag (type, 18, "AC");
+ append_flags_type_flag (type, 19, "VIF");
+ append_flags_type_flag (type, 20, "VIP");
+ append_flags_type_flag (type, 21, "ID");
+ i386_eflags_type = type;
-/* Construct the type for MMX registers. */
-static struct type *
-i386_build_mmx_type (void)
-{
/* The type we're building is this: */
#if 0
- union __gdb_builtin_type_vec64i
+ union __gdb_builtin_type_vec64i
{
int64_t uint64;
int32_t v2_int32[2];
};
#endif
- if (! i386_mmx_type)
- {
- struct type *t;
-
- t = init_composite_type ("__gdb_builtin_type_vec64i", TYPE_CODE_UNION);
- append_composite_type_field (t, "uint64", builtin_type_int64);
- append_composite_type_field (t, "v2_int32", builtin_type_v2_int32);
- append_composite_type_field (t, "v4_int16", builtin_type_v4_int16);
- append_composite_type_field (t, "v8_int8", builtin_type_v8_int8);
-
- TYPE_FLAGS (t) |= TYPE_FLAG_VECTOR;
- TYPE_NAME (t) = "builtin_type_vec64i";
-
- i386_mmx_type = t;
- }
+ type = init_composite_type ("__gdb_builtin_type_vec64i", TYPE_CODE_UNION);
+ append_composite_type_field (type, "uint64", builtin_type_int64);
+ append_composite_type_field (type, "v2_int32", builtin_type_v2_int32);
+ append_composite_type_field (type, "v4_int16", builtin_type_v4_int16);
+ append_composite_type_field (type, "v8_int8", builtin_type_v8_int8);
+ TYPE_FLAGS (type) |= TYPE_FLAG_VECTOR;
+ TYPE_NAME (type) = "builtin_type_vec64i";
+ i386_mmx_type = type;
- return i386_mmx_type;
-}
-
-/* Construct the type for SSE registers. */
-static struct type *
-i386_build_sse_type (void)
-{
- if (! i386_sse_type)
- {
- struct type *t;
-
- t = init_composite_type ("__gdb_builtin_type_vec128i", TYPE_CODE_UNION);
- append_composite_type_field (t, "v4_float", builtin_type_v4_float);
- append_composite_type_field (t, "v2_double", builtin_type_v2_double);
- append_composite_type_field (t, "v16_int8", builtin_type_v16_int8);
- append_composite_type_field (t, "v8_int16", builtin_type_v8_int16);
- append_composite_type_field (t, "v4_int32", builtin_type_v4_int32);
- append_composite_type_field (t, "v2_int64", builtin_type_v2_int64);
- append_composite_type_field (t, "uint128", builtin_type_int128);
-
- TYPE_FLAGS (t) |= TYPE_FLAG_VECTOR;
- TYPE_NAME (t) = "builtin_type_vec128i";
-
- i386_sse_type = t;
- }
+ /* The type we're building is this: */
+#if 0
+ union __gdb_builtin_type_vec128i
+ {
+ int128_t uint128;
+ int64_t v2_int64[2];
+ int32_t v4_int32[4];
+ int16_t v8_int16[8];
+ int8_t v16_int8[16];
+ double v2_double[2];
+ float v4_float[4];
+ };
+#endif
- return i386_sse_type;
+ type = init_composite_type ("__gdb_builtin_type_vec128i", TYPE_CODE_UNION);
+ append_composite_type_field (type, "v4_float", builtin_type_v4_float);
+ append_composite_type_field (type, "v2_double", builtin_type_v2_double);
+ append_composite_type_field (type, "v16_int8", builtin_type_v16_int8);
+ append_composite_type_field (type, "v8_int16", builtin_type_v8_int16);
+ append_composite_type_field (type, "v4_int32", builtin_type_v4_int32);
+ append_composite_type_field (type, "v2_int64", builtin_type_v2_int64);
+ append_composite_type_field (type, "uint128", builtin_type_int128);
+ TYPE_FLAGS (type) |= TYPE_FLAG_VECTOR;
+ TYPE_NAME (type) = "builtin_type_vec128i";
+ i386_sse_type = type;
+
+ type = init_flags_type ("builtin_type_i386_mxcsr", 4);
+ append_flags_type_flag (type, 0, "IE");
+ append_flags_type_flag (type, 1, "DE");
+ append_flags_type_flag (type, 2, "ZE");
+ append_flags_type_flag (type, 3, "OE");
+ append_flags_type_flag (type, 4, "UE");
+ append_flags_type_flag (type, 5, "PE");
+ append_flags_type_flag (type, 6, "DAZ");
+ append_flags_type_flag (type, 7, "IM");
+ append_flags_type_flag (type, 8, "DM");
+ append_flags_type_flag (type, 9, "ZM");
+ append_flags_type_flag (type, 10, "OM");
+ append_flags_type_flag (type, 11, "UM");
+ append_flags_type_flag (type, 12, "PM");
+ append_flags_type_flag (type, 15, "FZ");
+ i386_mxcsr_type = type;
}
/* Return the GDB type object for the "standard" data type of data in
if (regnum == I386_EIP_REGNUM)
return builtin_type_void_func_ptr;
+ if (regnum == I386_EFLAGS_REGNUM)
+ return i386_eflags_type;
+
if (regnum == I386_EBP_REGNUM || regnum == I386_ESP_REGNUM)
return builtin_type_void_data_ptr;
if (i386_fp_regnum_p (regnum))
return builtin_type_i387_ext;
+ if (i386_mmx_regnum_p (gdbarch, regnum))
+ return i386_mmx_type;
+
if (i386_sse_regnum_p (gdbarch, regnum))
- return i386_build_sse_type ();
+ return i386_sse_type;
- if (i386_mmx_regnum_p (gdbarch, regnum))
- return i386_build_mmx_type ();
+#define I387_ST0_REGNUM I386_ST0_REGNUM
+#define I387_NUM_XMM_REGS (gdbarch_tdep (current_gdbarch)->num_xmm_regs)
+
+ if (regnum == I387_MXCSR_REGNUM)
+ return i386_mxcsr_type;
+
+#undef I387_ST0_REGNUM
+#undef I387_NUM_XMM_REGS
return builtin_type_int;
}
gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_NETWARE,
i386_nw_init_abi);
- /* Initialize the i386 specific register groups. */
+ /* Initialize the i386-specific register groups & types. */
i386_init_reggroups ();
+ i386_init_types();
}
projects / deliverable / binutils-gdb.git / blobdiff