1999-04-16 03:35:26 +02:00
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/* Intel 386 target-dependent stuff.
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2001-03-06 09:22:02 +01:00
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Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
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1998, 1999, 2000, 2001
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1999-04-16 03:35:26 +02:00
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Free Software Foundation, Inc.
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1999-07-07 22:19:36 +02:00
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This file is part of GDB.
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1999-04-16 03:35:26 +02:00
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1999-07-07 22:19:36 +02:00
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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1999-04-16 03:35:26 +02:00
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1999-07-07 22:19:36 +02:00
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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1999-04-16 03:35:26 +02:00
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1999-07-07 22:19:36 +02:00
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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1999-04-16 03:35:26 +02:00
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#include "defs.h"
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#include "gdb_string.h"
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#include "frame.h"
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#include "inferior.h"
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#include "gdbcore.h"
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#include "target.h"
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#include "floatformat.h"
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#include "symtab.h"
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#include "gdbcmd.h"
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#include "command.h"
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2000-06-07 06:38:02 +02:00
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#include "arch-utils.h"
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2001-03-01 02:39:22 +01:00
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#include "regcache.h"
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* defs.h (HOST_FLOAT_FORMAT, HOST_DOUBLE_FORMAT)
(HOST_FLOAT_FORMAT, HOST_DOUBLE_FORMAT)
(HOST_LONG_DOUBLE_FORMAT, DOUBLEST)
(floatformat_to_doublest, floatformat_from_doublest)
(floatformat_is_negative, floatformat_is_nan)
(floatformat_mantissa, store_floating)
(extract_floating): Move declaration from here.
* doublest.h: To here. New file.
* utils.c (get_field, floatformat_to_doublest, put_field)
(ldfrexp, floatformat_from_doublest, floatformat_is_negative)
(floatformat_is_nan, floatformat_mantissa)
(FLOATFORMAT_CHAR_BIT): Move from here.
* doublest.c: To here. New file.
* findvar.c (store_floating, extract_floating): Move from here.
* doublest.c: To here.
* Makefile.in (SFILES): Add doublest.c.
(COMMON_OBS): Add doublest.o.
(doublest.o): Specify dependencies.
(doublest_h): Define.
* config/m88k/tm-m88k.h: Include "doublest.h".
* config/i960/tm-i960.h: Ditto.
* config/i386/tm-symmetry.h: Ditto.
* rs6000-tdep.c, valarith.c: Ditto.
* valprint.c, stabsread.c, sh-tdep.c: Ditto.
* ia64-tdep.c, i387-tdep.c, i386-tdep.c: Ditto.
* values.c, arm-tdep.c, arm-linux-tdep.c: Ditto.
* alpha-tdep.c, ax.h, expression.h: Ditto.
* sh-tdep.c, parse.c, top.c, value.h: Ditto.
* Makefile.in (arm-tdep.o): Add $(doublest_h).
(i386-tdep.o, i387-tdep.o, ia64-tdep.o): Ditto.
(rs6000-tdep.o, stabsread.o, valarith.o): Ditto.
(values.o, valprint.o, arm-linux-tdep.o): Ditto.
(alpha-tdep.o, ax_h, parse.o, top.o, value_h): Ditto.
(parser_defs_h): Ditto.
(expression_h): Add $(doublest_h) and $(symtab_h).
2001-08-01 20:39:27 +02:00
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#include "doublest.h"
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2001-10-21 19:19:38 +02:00
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#include "value.h"
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2001-11-08 19:32:08 +01:00
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#include "i386-tdep.h"
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2001-07-28 18:48:59 +02:00
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#include "gdb_assert.h"
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2001-11-08 19:32:08 +01:00
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#undef XMALLOC
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#define XMALLOC(TYPE) ((TYPE*) xmalloc (sizeof (TYPE)))
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2001-10-31 23:24:06 +01:00
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/* Names of the registers. The first 10 registers match the register
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numbering scheme used by GCC for stabs and DWARF. */
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static char *i386_register_names[] =
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{
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"eax", "ecx", "edx", "ebx",
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"esp", "ebp", "esi", "edi",
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"eip", "eflags", "cs", "ss",
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"ds", "es", "fs", "gs",
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"st0", "st1", "st2", "st3",
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"st4", "st5", "st6", "st7",
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"fctrl", "fstat", "ftag", "fiseg",
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"fioff", "foseg", "fooff", "fop",
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"xmm0", "xmm1", "xmm2", "xmm3",
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"xmm4", "xmm5", "xmm6", "xmm7",
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"mxcsr"
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};
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2001-11-04 14:51:48 +01:00
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/* i386_register_offset[i] is the offset into the register file of the
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1999-10-19 04:47:02 +02:00
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start of register number i. We initialize this from
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2001-11-04 14:51:48 +01:00
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i386_register_size. */
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static int i386_register_offset[MAX_NUM_REGS];
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1999-10-19 04:47:02 +02:00
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2001-11-04 14:51:48 +01:00
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/* i386_register_size[i] is the number of bytes of storage in GDB's
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register array occupied by register i. */
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static int i386_register_size[MAX_NUM_REGS] = {
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1999-10-19 04:47:02 +02:00
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4, 4, 4, 4,
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4, 4, 4, 4,
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4, 4, 4, 4,
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4, 4, 4, 4,
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10, 10, 10, 10,
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10, 10, 10, 10,
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4, 4, 4, 4,
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4, 4, 4, 4,
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16, 16, 16, 16,
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16, 16, 16, 16,
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4
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};
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2001-10-31 23:24:06 +01:00
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/* Return the name of register REG. */
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char *
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i386_register_name (int reg)
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{
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if (reg < 0)
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return NULL;
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if (reg >= sizeof (i386_register_names) / sizeof (*i386_register_names))
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return NULL;
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return i386_register_names[reg];
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}
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2001-11-04 14:51:48 +01:00
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/* Return the offset into the register array of the start of register
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number REG. */
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int
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i386_register_byte (int reg)
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{
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return i386_register_offset[reg];
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}
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/* Return the number of bytes of storage in GDB's register array
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occupied by register REG. */
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int
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i386_register_raw_size (int reg)
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{
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return i386_register_size[reg];
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}
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/* Return the size in bytes of the virtual type of register REG. */
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int
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i386_register_virtual_size (int reg)
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{
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return TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (reg));
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}
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2001-07-28 19:03:38 +02:00
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/* Convert stabs register number REG to the appropriate register
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number used by GDB. */
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int
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i386_stab_reg_to_regnum (int reg)
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{
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/* This implements what GCC calls the "default" register map. */
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if (reg >= 0 && reg <= 7)
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{
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/* General registers. */
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return reg;
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}
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else if (reg >= 12 && reg <= 19)
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{
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/* Floating-point registers. */
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return reg - 12 + FP0_REGNUM;
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}
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else if (reg >= 21 && reg <= 28)
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{
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/* SSE registers. */
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return reg - 21 + XMM0_REGNUM;
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}
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else if (reg >= 29 && reg <= 36)
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{
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/* MMX registers. */
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/* FIXME: kettenis/2001-07-28: Should we have the MMX registers
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as pseudo-registers? */
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return reg - 29 + FP0_REGNUM;
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}
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/* This will hopefully provoke a warning. */
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return NUM_REGS + NUM_PSEUDO_REGS;
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}
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/* Convert Dwarf register number REG to the appropriate register
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number used by GDB. */
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int
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i386_dwarf_reg_to_regnum (int reg)
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{
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/* The DWARF register numbering includes %eip and %eflags, and
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numbers the floating point registers differently. */
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if (reg >= 0 && reg <= 9)
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{
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/* General registers. */
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return reg;
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}
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else if (reg >= 11 && reg <= 18)
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{
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/* Floating-point registers. */
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return reg - 11 + FP0_REGNUM;
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}
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else if (reg >= 21)
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{
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/* The SSE and MMX registers have identical numbers as in stabs. */
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return i386_stab_reg_to_regnum (reg);
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}
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/* This will hopefully provoke a warning. */
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return NUM_REGS + NUM_PSEUDO_REGS;
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}
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2001-03-17 23:28:33 +01:00
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1999-10-19 04:47:02 +02:00
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2001-03-17 23:28:33 +01:00
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/* This is the variable that is set with "set disassembly-flavor", and
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its legitimate values. */
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2000-06-08 02:52:56 +02:00
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static const char att_flavor[] = "att";
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static const char intel_flavor[] = "intel";
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static const char *valid_flavors[] =
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1999-07-07 22:19:36 +02:00
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{
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1999-04-16 03:35:26 +02:00
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att_flavor,
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intel_flavor,
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NULL
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};
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2000-06-08 02:52:56 +02:00
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static const char *disassembly_flavor = att_flavor;
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1999-04-16 03:35:26 +02:00
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2001-03-17 23:28:33 +01:00
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/* Stdio style buffering was used to minimize calls to ptrace, but
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this buffering did not take into account that the code section
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being accessed may not be an even number of buffers long (even if
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the buffer is only sizeof(int) long). In cases where the code
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section size happened to be a non-integral number of buffers long,
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attempting to read the last buffer would fail. Simply using
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target_read_memory and ignoring errors, rather than read_memory, is
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not the correct solution, since legitimate access errors would then
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be totally ignored. To properly handle this situation and continue
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to use buffering would require that this code be able to determine
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the minimum code section size granularity (not the alignment of the
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section itself, since the actual failing case that pointed out this
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problem had a section alignment of 4 but was not a multiple of 4
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bytes long), on a target by target basis, and then adjust it's
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buffer size accordingly. This is messy, but potentially feasible.
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It probably needs the bfd library's help and support. For now, the
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buffer size is set to 1. (FIXME -fnf) */
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#define CODESTREAM_BUFSIZ 1 /* Was sizeof(int), see note above. */
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1999-04-16 03:35:26 +02:00
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static CORE_ADDR codestream_next_addr;
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static CORE_ADDR codestream_addr;
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static unsigned char codestream_buf[CODESTREAM_BUFSIZ];
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static int codestream_off;
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static int codestream_cnt;
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#define codestream_tell() (codestream_addr + codestream_off)
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2001-03-17 23:28:33 +01:00
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#define codestream_peek() \
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(codestream_cnt == 0 ? \
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codestream_fill(1) : codestream_buf[codestream_off])
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#define codestream_get() \
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(codestream_cnt-- == 0 ? \
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codestream_fill(0) : codestream_buf[codestream_off++])
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1999-04-16 03:35:26 +02:00
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1999-07-07 22:19:36 +02:00
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static unsigned char
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2000-07-30 03:48:28 +02:00
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codestream_fill (int peek_flag)
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1999-04-16 03:35:26 +02:00
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{
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codestream_addr = codestream_next_addr;
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codestream_next_addr += CODESTREAM_BUFSIZ;
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codestream_off = 0;
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codestream_cnt = CODESTREAM_BUFSIZ;
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read_memory (codestream_addr, (char *) codestream_buf, CODESTREAM_BUFSIZ);
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1999-07-07 22:19:36 +02:00
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1999-04-16 03:35:26 +02:00
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if (peek_flag)
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1999-07-07 22:19:36 +02:00
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return (codestream_peek ());
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1999-04-16 03:35:26 +02:00
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else
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1999-07-07 22:19:36 +02:00
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return (codestream_get ());
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1999-04-16 03:35:26 +02:00
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}
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static void
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2000-07-30 03:48:28 +02:00
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codestream_seek (CORE_ADDR place)
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1999-04-16 03:35:26 +02:00
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{
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codestream_next_addr = place / CODESTREAM_BUFSIZ;
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codestream_next_addr *= CODESTREAM_BUFSIZ;
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codestream_cnt = 0;
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codestream_fill (1);
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1999-07-07 22:19:36 +02:00
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while (codestream_tell () != place)
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1999-04-16 03:35:26 +02:00
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codestream_get ();
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}
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static void
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2000-07-30 03:48:28 +02:00
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codestream_read (unsigned char *buf, int count)
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1999-04-16 03:35:26 +02:00
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{
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unsigned char *p;
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int i;
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p = buf;
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for (i = 0; i < count; i++)
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*p++ = codestream_get ();
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}
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2001-03-17 23:28:33 +01:00
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1999-04-16 03:35:26 +02:00
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2001-03-17 23:28:33 +01:00
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/* If the next instruction is a jump, move to its target. */
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1999-04-16 03:35:26 +02:00
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|
|
static void
|
2000-07-30 03:48:28 +02:00
|
|
|
|
i386_follow_jump (void)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
|
|
|
|
unsigned char buf[4];
|
|
|
|
|
long delta;
|
|
|
|
|
|
|
|
|
|
int data16;
|
|
|
|
|
CORE_ADDR pos;
|
|
|
|
|
|
|
|
|
|
pos = codestream_tell ();
|
|
|
|
|
|
|
|
|
|
data16 = 0;
|
|
|
|
|
if (codestream_peek () == 0x66)
|
|
|
|
|
{
|
|
|
|
|
codestream_get ();
|
|
|
|
|
data16 = 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
switch (codestream_get ())
|
|
|
|
|
{
|
|
|
|
|
case 0xe9:
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* Relative jump: if data16 == 0, disp32, else disp16. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
if (data16)
|
|
|
|
|
{
|
|
|
|
|
codestream_read (buf, 2);
|
|
|
|
|
delta = extract_signed_integer (buf, 2);
|
|
|
|
|
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* Include the size of the jmp instruction (including the
|
|
|
|
|
0x66 prefix). */
|
1999-07-07 22:19:36 +02:00
|
|
|
|
pos += delta + 4;
|
1999-04-16 03:35:26 +02:00
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
codestream_read (buf, 4);
|
|
|
|
|
delta = extract_signed_integer (buf, 4);
|
|
|
|
|
|
|
|
|
|
pos += delta + 5;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case 0xeb:
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* Relative jump, disp8 (ignore data16). */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
codestream_read (buf, 1);
|
|
|
|
|
/* Sign-extend it. */
|
|
|
|
|
delta = extract_signed_integer (buf, 1);
|
|
|
|
|
|
|
|
|
|
pos += delta + 2;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
codestream_seek (pos);
|
|
|
|
|
}
|
|
|
|
|
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* Find & return the amount a local space allocated, and advance the
|
|
|
|
|
codestream to the first register push (if any).
|
|
|
|
|
|
|
|
|
|
If the entry sequence doesn't make sense, return -1, and leave
|
|
|
|
|
codestream pointer at a random spot. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
|
|
|
|
|
static long
|
2000-07-30 03:48:28 +02:00
|
|
|
|
i386_get_frame_setup (CORE_ADDR pc)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
|
|
|
|
unsigned char op;
|
|
|
|
|
|
|
|
|
|
codestream_seek (pc);
|
|
|
|
|
|
|
|
|
|
i386_follow_jump ();
|
|
|
|
|
|
|
|
|
|
op = codestream_get ();
|
|
|
|
|
|
|
|
|
|
if (op == 0x58) /* popl %eax */
|
|
|
|
|
{
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* This function must start with
|
|
|
|
|
|
|
|
|
|
popl %eax 0x58
|
|
|
|
|
xchgl %eax, (%esp) 0x87 0x04 0x24
|
|
|
|
|
or xchgl %eax, 0(%esp) 0x87 0x44 0x24 0x00
|
|
|
|
|
|
|
|
|
|
(the System V compiler puts out the second `xchg'
|
|
|
|
|
instruction, and the assembler doesn't try to optimize it, so
|
|
|
|
|
the 'sib' form gets generated). This sequence is used to get
|
|
|
|
|
the address of the return buffer for a function that returns
|
|
|
|
|
a structure. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
int pos;
|
|
|
|
|
unsigned char buf[4];
|
2001-03-17 23:28:33 +01:00
|
|
|
|
static unsigned char proto1[3] = { 0x87, 0x04, 0x24 };
|
|
|
|
|
static unsigned char proto2[4] = { 0x87, 0x44, 0x24, 0x00 };
|
|
|
|
|
|
1999-04-16 03:35:26 +02:00
|
|
|
|
pos = codestream_tell ();
|
|
|
|
|
codestream_read (buf, 4);
|
|
|
|
|
if (memcmp (buf, proto1, 3) == 0)
|
|
|
|
|
pos += 3;
|
|
|
|
|
else if (memcmp (buf, proto2, 4) == 0)
|
|
|
|
|
pos += 4;
|
|
|
|
|
|
|
|
|
|
codestream_seek (pos);
|
2001-03-17 23:28:33 +01:00
|
|
|
|
op = codestream_get (); /* Update next opcode. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (op == 0x68 || op == 0x6a)
|
|
|
|
|
{
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* This function may start with
|
|
|
|
|
|
|
|
|
|
pushl constant
|
|
|
|
|
call _probe
|
|
|
|
|
addl $4, %esp
|
|
|
|
|
|
|
|
|
|
followed by
|
|
|
|
|
|
|
|
|
|
pushl %ebp
|
|
|
|
|
|
|
|
|
|
etc. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
int pos;
|
|
|
|
|
unsigned char buf[8];
|
|
|
|
|
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* Skip past the `pushl' instruction; it has either a one-byte
|
1999-04-16 03:35:26 +02:00
|
|
|
|
or a four-byte operand, depending on the opcode. */
|
|
|
|
|
pos = codestream_tell ();
|
|
|
|
|
if (op == 0x68)
|
|
|
|
|
pos += 4;
|
|
|
|
|
else
|
|
|
|
|
pos += 1;
|
|
|
|
|
codestream_seek (pos);
|
|
|
|
|
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* Read the following 8 bytes, which should be "call _probe" (6
|
|
|
|
|
bytes) followed by "addl $4,%esp" (2 bytes). */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
codestream_read (buf, sizeof (buf));
|
|
|
|
|
if (buf[0] == 0xe8 && buf[6] == 0xc4 && buf[7] == 0x4)
|
|
|
|
|
pos += sizeof (buf);
|
|
|
|
|
codestream_seek (pos);
|
2001-03-17 23:28:33 +01:00
|
|
|
|
op = codestream_get (); /* Update next opcode. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (op == 0x55) /* pushl %ebp */
|
1999-07-07 22:19:36 +02:00
|
|
|
|
{
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* Check for "movl %esp, %ebp" -- can be written in two ways. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
switch (codestream_get ())
|
|
|
|
|
{
|
|
|
|
|
case 0x8b:
|
|
|
|
|
if (codestream_get () != 0xec)
|
2001-03-17 23:28:33 +01:00
|
|
|
|
return -1;
|
1999-04-16 03:35:26 +02:00
|
|
|
|
break;
|
|
|
|
|
case 0x89:
|
|
|
|
|
if (codestream_get () != 0xe5)
|
2001-03-17 23:28:33 +01:00
|
|
|
|
return -1;
|
1999-04-16 03:35:26 +02:00
|
|
|
|
break;
|
|
|
|
|
default:
|
2001-03-17 23:28:33 +01:00
|
|
|
|
return -1;
|
1999-04-16 03:35:26 +02:00
|
|
|
|
}
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* Check for stack adjustment
|
|
|
|
|
|
|
|
|
|
subl $XXX, %esp
|
|
|
|
|
|
|
|
|
|
NOTE: You can't subtract a 16 bit immediate from a 32 bit
|
|
|
|
|
reg, so we don't have to worry about a data16 prefix. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
op = codestream_peek ();
|
|
|
|
|
if (op == 0x83)
|
|
|
|
|
{
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* `subl' with 8 bit immediate. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
codestream_get ();
|
|
|
|
|
if (codestream_get () != 0xec)
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* Some instruction starting with 0x83 other than `subl'. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
|
|
|
|
codestream_seek (codestream_tell () - 2);
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* `subl' with signed byte immediate (though it wouldn't
|
|
|
|
|
make sense to be negative). */
|
1999-07-07 22:19:36 +02:00
|
|
|
|
return (codestream_get ());
|
1999-04-16 03:35:26 +02:00
|
|
|
|
}
|
|
|
|
|
else if (op == 0x81)
|
|
|
|
|
{
|
|
|
|
|
char buf[4];
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* Maybe it is `subl' with a 32 bit immedediate. */
|
1999-07-07 22:19:36 +02:00
|
|
|
|
codestream_get ();
|
1999-04-16 03:35:26 +02:00
|
|
|
|
if (codestream_get () != 0xec)
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* Some instruction starting with 0x81 other than `subl'. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
|
|
|
|
codestream_seek (codestream_tell () - 2);
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* It is `subl' with a 32 bit immediate. */
|
1999-07-07 22:19:36 +02:00
|
|
|
|
codestream_read ((unsigned char *) buf, 4);
|
1999-04-16 03:35:26 +02:00
|
|
|
|
return extract_signed_integer (buf, 4);
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
2001-03-17 23:28:33 +01:00
|
|
|
|
return 0;
|
1999-04-16 03:35:26 +02:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
else if (op == 0xc8)
|
|
|
|
|
{
|
|
|
|
|
char buf[2];
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* `enter' with 16 bit unsigned immediate. */
|
1999-07-07 22:19:36 +02:00
|
|
|
|
codestream_read ((unsigned char *) buf, 2);
|
2001-03-17 23:28:33 +01:00
|
|
|
|
codestream_get (); /* Flush final byte of enter instruction. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
return extract_unsigned_integer (buf, 2);
|
|
|
|
|
}
|
|
|
|
|
return (-1);
|
|
|
|
|
}
|
|
|
|
|
|
2001-04-16 15:03:15 +02:00
|
|
|
|
/* Return the chain-pointer for FRAME. In the case of the i386, the
|
|
|
|
|
frame's nominal address is the address of a 4-byte word containing
|
|
|
|
|
the calling frame's address. */
|
|
|
|
|
|
|
|
|
|
CORE_ADDR
|
|
|
|
|
i386_frame_chain (struct frame_info *frame)
|
|
|
|
|
{
|
|
|
|
|
if (frame->signal_handler_caller)
|
|
|
|
|
return frame->frame;
|
|
|
|
|
|
|
|
|
|
if (! inside_entry_file (frame->pc))
|
|
|
|
|
return read_memory_unsigned_integer (frame->frame, 4);
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2001-04-19 13:39:48 +02:00
|
|
|
|
/* Determine whether the function invocation represented by FRAME does
|
|
|
|
|
not have a from on the stack associated with it. If it does not,
|
|
|
|
|
return non-zero, otherwise return zero. */
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
i386_frameless_function_invocation (struct frame_info *frame)
|
|
|
|
|
{
|
|
|
|
|
if (frame->signal_handler_caller)
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
return frameless_look_for_prologue (frame);
|
|
|
|
|
}
|
|
|
|
|
|
2001-05-09 18:16:33 +02:00
|
|
|
|
/* Return the saved program counter for FRAME. */
|
|
|
|
|
|
|
|
|
|
CORE_ADDR
|
|
|
|
|
i386_frame_saved_pc (struct frame_info *frame)
|
|
|
|
|
{
|
|
|
|
|
/* FIXME: kettenis/2001-05-09: Conditionalizing the next bit of code
|
|
|
|
|
on SIGCONTEXT_PC_OFFSET and I386V4_SIGTRAMP_SAVED_PC should be
|
|
|
|
|
considered a temporary hack. I plan to come up with something
|
|
|
|
|
better when we go multi-arch. */
|
|
|
|
|
#if defined (SIGCONTEXT_PC_OFFSET) || defined (I386V4_SIGTRAMP_SAVED_PC)
|
|
|
|
|
if (frame->signal_handler_caller)
|
|
|
|
|
return sigtramp_saved_pc (frame);
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
return read_memory_unsigned_integer (frame->frame + 4, 4);
|
|
|
|
|
}
|
|
|
|
|
|
2001-04-18 01:20:55 +02:00
|
|
|
|
/* Immediately after a function call, return the saved pc. */
|
|
|
|
|
|
|
|
|
|
CORE_ADDR
|
|
|
|
|
i386_saved_pc_after_call (struct frame_info *frame)
|
|
|
|
|
{
|
|
|
|
|
return read_memory_unsigned_integer (read_register (SP_REGNUM), 4);
|
|
|
|
|
}
|
|
|
|
|
|
1999-04-16 03:35:26 +02:00
|
|
|
|
/* Return number of args passed to a frame.
|
|
|
|
|
Can return -1, meaning no way to tell. */
|
|
|
|
|
|
|
|
|
|
int
|
2000-07-30 03:48:28 +02:00
|
|
|
|
i386_frame_num_args (struct frame_info *fi)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
|
|
|
|
#if 1
|
|
|
|
|
return -1;
|
|
|
|
|
#else
|
|
|
|
|
/* This loses because not only might the compiler not be popping the
|
2001-03-17 23:28:33 +01:00
|
|
|
|
args right after the function call, it might be popping args from
|
|
|
|
|
both this call and a previous one, and we would say there are
|
|
|
|
|
more args than there really are. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
|
1999-07-07 22:19:36 +02:00
|
|
|
|
int retpc;
|
|
|
|
|
unsigned char op;
|
1999-04-16 03:35:26 +02:00
|
|
|
|
struct frame_info *pfi;
|
|
|
|
|
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* On the i386, the instruction following the call could be:
|
1999-04-16 03:35:26 +02:00
|
|
|
|
popl %ecx - one arg
|
|
|
|
|
addl $imm, %esp - imm/4 args; imm may be 8 or 32 bits
|
2001-03-17 23:28:33 +01:00
|
|
|
|
anything else - zero args. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
|
|
|
|
|
int frameless;
|
|
|
|
|
|
1999-05-25 20:09:09 +02:00
|
|
|
|
frameless = FRAMELESS_FUNCTION_INVOCATION (fi);
|
1999-04-16 03:35:26 +02:00
|
|
|
|
if (frameless)
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* In the absence of a frame pointer, GDB doesn't get correct
|
|
|
|
|
values for nameless arguments. Return -1, so it doesn't print
|
|
|
|
|
any nameless arguments. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
return -1;
|
|
|
|
|
|
1999-07-07 22:19:36 +02:00
|
|
|
|
pfi = get_prev_frame (fi);
|
1999-04-16 03:35:26 +02:00
|
|
|
|
if (pfi == 0)
|
|
|
|
|
{
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* NOTE: This can happen if we are looking at the frame for
|
|
|
|
|
main, because FRAME_CHAIN_VALID won't let us go into start.
|
|
|
|
|
If we have debugging symbols, that's not really a big deal;
|
|
|
|
|
it just means it will only show as many arguments to main as
|
|
|
|
|
are declared. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
return -1;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
1999-07-07 22:19:36 +02:00
|
|
|
|
retpc = pfi->pc;
|
|
|
|
|
op = read_memory_integer (retpc, 1);
|
2001-03-17 23:28:33 +01:00
|
|
|
|
if (op == 0x59) /* pop %ecx */
|
1999-07-07 22:19:36 +02:00
|
|
|
|
return 1;
|
1999-04-16 03:35:26 +02:00
|
|
|
|
else if (op == 0x83)
|
|
|
|
|
{
|
1999-07-07 22:19:36 +02:00
|
|
|
|
op = read_memory_integer (retpc + 1, 1);
|
|
|
|
|
if (op == 0xc4)
|
|
|
|
|
/* addl $<signed imm 8 bits>, %esp */
|
|
|
|
|
return (read_memory_integer (retpc + 2, 1) & 0xff) / 4;
|
1999-04-16 03:35:26 +02:00
|
|
|
|
else
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
2001-03-17 23:28:33 +01:00
|
|
|
|
else if (op == 0x81) /* `add' with 32 bit immediate. */
|
|
|
|
|
{
|
1999-07-07 22:19:36 +02:00
|
|
|
|
op = read_memory_integer (retpc + 1, 1);
|
|
|
|
|
if (op == 0xc4)
|
|
|
|
|
/* addl $<imm 32>, %esp */
|
|
|
|
|
return read_memory_integer (retpc + 2, 4) / 4;
|
1999-04-16 03:35:26 +02:00
|
|
|
|
else
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* Parse the first few instructions the function to see what registers
|
|
|
|
|
were stored.
|
|
|
|
|
|
|
|
|
|
We handle these cases:
|
|
|
|
|
|
|
|
|
|
The startup sequence can be at the start of the function, or the
|
|
|
|
|
function can start with a branch to startup code at the end.
|
|
|
|
|
|
|
|
|
|
%ebp can be set up with either the 'enter' instruction, or "pushl
|
|
|
|
|
%ebp, movl %esp, %ebp" (`enter' is too slow to be useful, but was
|
|
|
|
|
once used in the System V compiler).
|
|
|
|
|
|
|
|
|
|
Local space is allocated just below the saved %ebp by either the
|
|
|
|
|
'enter' instruction, or by "subl $<size>, %esp". 'enter' has a 16
|
|
|
|
|
bit unsigned argument for space to allocate, and the 'addl'
|
|
|
|
|
instruction could have either a signed byte, or 32 bit immediate.
|
|
|
|
|
|
|
|
|
|
Next, the registers used by this function are pushed. With the
|
|
|
|
|
System V compiler they will always be in the order: %edi, %esi,
|
|
|
|
|
%ebx (and sometimes a harmless bug causes it to also save but not
|
|
|
|
|
restore %eax); however, the code below is willing to see the pushes
|
|
|
|
|
in any order, and will handle up to 8 of them.
|
|
|
|
|
|
|
|
|
|
If the setup sequence is at the end of the function, then the next
|
|
|
|
|
instruction will be a branch back to the start. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
|
|
|
|
|
void
|
2000-07-30 03:48:28 +02:00
|
|
|
|
i386_frame_init_saved_regs (struct frame_info *fip)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
|
|
|
|
long locals = -1;
|
|
|
|
|
unsigned char op;
|
|
|
|
|
CORE_ADDR dummy_bottom;
|
2001-03-17 23:28:33 +01:00
|
|
|
|
CORE_ADDR addr;
|
1999-04-16 03:35:26 +02:00
|
|
|
|
CORE_ADDR pc;
|
|
|
|
|
int i;
|
1999-07-07 22:19:36 +02:00
|
|
|
|
|
2000-02-29 14:28:24 +01:00
|
|
|
|
if (fip->saved_regs)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
frame_saved_regs_zalloc (fip);
|
1999-07-07 22:19:36 +02:00
|
|
|
|
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* If the frame is the end of a dummy, compute where the beginning
|
|
|
|
|
would be. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
dummy_bottom = fip->frame - 4 - REGISTER_BYTES - CALL_DUMMY_LENGTH;
|
1999-07-07 22:19:36 +02:00
|
|
|
|
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* Check if the PC points in the stack, in a dummy frame. */
|
1999-07-07 22:19:36 +02:00
|
|
|
|
if (dummy_bottom <= fip->pc && fip->pc <= fip->frame)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* All registers were saved by push_call_dummy. */
|
|
|
|
|
addr = fip->frame;
|
1999-07-07 22:19:36 +02:00
|
|
|
|
for (i = 0; i < NUM_REGS; i++)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
2001-03-17 23:28:33 +01:00
|
|
|
|
addr -= REGISTER_RAW_SIZE (i);
|
|
|
|
|
fip->saved_regs[i] = addr;
|
1999-04-16 03:35:26 +02:00
|
|
|
|
}
|
|
|
|
|
return;
|
|
|
|
|
}
|
1999-07-07 22:19:36 +02:00
|
|
|
|
|
1999-04-16 03:35:26 +02:00
|
|
|
|
pc = get_pc_function_start (fip->pc);
|
|
|
|
|
if (pc != 0)
|
|
|
|
|
locals = i386_get_frame_setup (pc);
|
1999-07-07 22:19:36 +02:00
|
|
|
|
|
|
|
|
|
if (locals >= 0)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
2001-03-17 23:28:33 +01:00
|
|
|
|
addr = fip->frame - 4 - locals;
|
1999-07-07 22:19:36 +02:00
|
|
|
|
for (i = 0; i < 8; i++)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
|
|
|
|
op = codestream_get ();
|
|
|
|
|
if (op < 0x50 || op > 0x57)
|
|
|
|
|
break;
|
|
|
|
|
#ifdef I386_REGNO_TO_SYMMETRY
|
|
|
|
|
/* Dynix uses different internal numbering. Ick. */
|
2001-03-17 23:28:33 +01:00
|
|
|
|
fip->saved_regs[I386_REGNO_TO_SYMMETRY (op - 0x50)] = addr;
|
1999-04-16 03:35:26 +02:00
|
|
|
|
#else
|
2001-03-17 23:28:33 +01:00
|
|
|
|
fip->saved_regs[op - 0x50] = addr;
|
1999-04-16 03:35:26 +02:00
|
|
|
|
#endif
|
2001-03-17 23:28:33 +01:00
|
|
|
|
addr -= 4;
|
1999-04-16 03:35:26 +02:00
|
|
|
|
}
|
|
|
|
|
}
|
1999-07-07 22:19:36 +02:00
|
|
|
|
|
2000-02-29 14:28:24 +01:00
|
|
|
|
fip->saved_regs[PC_REGNUM] = fip->frame + 4;
|
|
|
|
|
fip->saved_regs[FP_REGNUM] = fip->frame;
|
1999-04-16 03:35:26 +02:00
|
|
|
|
}
|
|
|
|
|
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* Return PC of first real instruction. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
|
|
|
|
|
int
|
2000-07-30 03:48:28 +02:00
|
|
|
|
i386_skip_prologue (int pc)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
|
|
|
|
unsigned char op;
|
|
|
|
|
int i;
|
1999-07-07 22:19:36 +02:00
|
|
|
|
static unsigned char pic_pat[6] =
|
2001-03-17 23:28:33 +01:00
|
|
|
|
{ 0xe8, 0, 0, 0, 0, /* call 0x0 */
|
|
|
|
|
0x5b, /* popl %ebx */
|
1999-07-07 22:19:36 +02:00
|
|
|
|
};
|
1999-04-16 03:35:26 +02:00
|
|
|
|
CORE_ADDR pos;
|
1999-07-07 22:19:36 +02:00
|
|
|
|
|
1999-04-16 03:35:26 +02:00
|
|
|
|
if (i386_get_frame_setup (pc) < 0)
|
|
|
|
|
return (pc);
|
1999-07-07 22:19:36 +02:00
|
|
|
|
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* Found valid frame setup -- codestream now points to start of push
|
|
|
|
|
instructions for saving registers. */
|
1999-07-07 22:19:36 +02:00
|
|
|
|
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* Skip over register saves. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
for (i = 0; i < 8; i++)
|
|
|
|
|
{
|
|
|
|
|
op = codestream_peek ();
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* Break if not `pushl' instrunction. */
|
1999-07-07 22:19:36 +02:00
|
|
|
|
if (op < 0x50 || op > 0x57)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
break;
|
|
|
|
|
codestream_get ();
|
|
|
|
|
}
|
|
|
|
|
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* The native cc on SVR4 in -K PIC mode inserts the following code
|
|
|
|
|
to get the address of the global offset table (GOT) into register
|
|
|
|
|
%ebx
|
|
|
|
|
|
|
|
|
|
call 0x0
|
|
|
|
|
popl %ebx
|
|
|
|
|
movl %ebx,x(%ebp) (optional)
|
|
|
|
|
addl y,%ebx
|
|
|
|
|
|
1999-04-16 03:35:26 +02:00
|
|
|
|
This code is with the rest of the prologue (at the end of the
|
|
|
|
|
function), so we have to skip it to get to the first real
|
|
|
|
|
instruction at the start of the function. */
|
1999-07-07 22:19:36 +02:00
|
|
|
|
|
1999-04-16 03:35:26 +02:00
|
|
|
|
pos = codestream_tell ();
|
|
|
|
|
for (i = 0; i < 6; i++)
|
|
|
|
|
{
|
|
|
|
|
op = codestream_get ();
|
1999-07-07 22:19:36 +02:00
|
|
|
|
if (pic_pat[i] != op)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if (i == 6)
|
|
|
|
|
{
|
|
|
|
|
unsigned char buf[4];
|
|
|
|
|
long delta = 6;
|
|
|
|
|
|
|
|
|
|
op = codestream_get ();
|
1999-07-07 22:19:36 +02:00
|
|
|
|
if (op == 0x89) /* movl %ebx, x(%ebp) */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
|
|
|
|
op = codestream_get ();
|
2001-03-17 23:28:33 +01:00
|
|
|
|
if (op == 0x5d) /* One byte offset from %ebp. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
|
|
|
|
delta += 3;
|
|
|
|
|
codestream_read (buf, 1);
|
|
|
|
|
}
|
2001-03-17 23:28:33 +01:00
|
|
|
|
else if (op == 0x9d) /* Four byte offset from %ebp. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
|
|
|
|
delta += 6;
|
|
|
|
|
codestream_read (buf, 4);
|
|
|
|
|
}
|
2001-03-17 23:28:33 +01:00
|
|
|
|
else /* Unexpected instruction. */
|
1999-07-07 22:19:36 +02:00
|
|
|
|
delta = -1;
|
|
|
|
|
op = codestream_get ();
|
1999-04-16 03:35:26 +02:00
|
|
|
|
}
|
1999-07-07 22:19:36 +02:00
|
|
|
|
/* addl y,%ebx */
|
|
|
|
|
if (delta > 0 && op == 0x81 && codestream_get () == 0xc3)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
1999-07-07 22:19:36 +02:00
|
|
|
|
pos += delta + 6;
|
1999-04-16 03:35:26 +02:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
codestream_seek (pos);
|
1999-07-07 22:19:36 +02:00
|
|
|
|
|
1999-04-16 03:35:26 +02:00
|
|
|
|
i386_follow_jump ();
|
1999-07-07 22:19:36 +02:00
|
|
|
|
|
1999-04-16 03:35:26 +02:00
|
|
|
|
return (codestream_tell ());
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void
|
2000-07-30 03:48:28 +02:00
|
|
|
|
i386_push_dummy_frame (void)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
|
|
|
|
CORE_ADDR sp = read_register (SP_REGNUM);
|
|
|
|
|
int regnum;
|
|
|
|
|
char regbuf[MAX_REGISTER_RAW_SIZE];
|
1999-07-07 22:19:36 +02:00
|
|
|
|
|
1999-04-16 03:35:26 +02:00
|
|
|
|
sp = push_word (sp, read_register (PC_REGNUM));
|
|
|
|
|
sp = push_word (sp, read_register (FP_REGNUM));
|
|
|
|
|
write_register (FP_REGNUM, sp);
|
|
|
|
|
for (regnum = 0; regnum < NUM_REGS; regnum++)
|
|
|
|
|
{
|
|
|
|
|
read_register_gen (regnum, regbuf);
|
|
|
|
|
sp = push_bytes (sp, regbuf, REGISTER_RAW_SIZE (regnum));
|
|
|
|
|
}
|
|
|
|
|
write_register (SP_REGNUM, sp);
|
|
|
|
|
}
|
|
|
|
|
|
2000-06-12 03:44:35 +02:00
|
|
|
|
/* Insert the (relative) function address into the call sequence
|
|
|
|
|
stored at DYMMY. */
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
i386_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun, int nargs,
|
2001-07-15 22:10:02 +02:00
|
|
|
|
struct value **args, struct type *type, int gcc_p)
|
2000-06-12 03:44:35 +02:00
|
|
|
|
{
|
|
|
|
|
int from, to, delta, loc;
|
|
|
|
|
|
|
|
|
|
loc = (int)(read_register (SP_REGNUM) - CALL_DUMMY_LENGTH);
|
|
|
|
|
from = loc + 5;
|
|
|
|
|
to = (int)(fun);
|
|
|
|
|
delta = to - from;
|
|
|
|
|
|
|
|
|
|
*((char *)(dummy) + 1) = (delta & 0xff);
|
|
|
|
|
*((char *)(dummy) + 2) = ((delta >> 8) & 0xff);
|
|
|
|
|
*((char *)(dummy) + 3) = ((delta >> 16) & 0xff);
|
|
|
|
|
*((char *)(dummy) + 4) = ((delta >> 24) & 0xff);
|
|
|
|
|
}
|
|
|
|
|
|
1999-04-16 03:35:26 +02:00
|
|
|
|
void
|
2000-07-30 03:48:28 +02:00
|
|
|
|
i386_pop_frame (void)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
|
|
|
|
struct frame_info *frame = get_current_frame ();
|
|
|
|
|
CORE_ADDR fp;
|
|
|
|
|
int regnum;
|
|
|
|
|
char regbuf[MAX_REGISTER_RAW_SIZE];
|
1999-07-07 22:19:36 +02:00
|
|
|
|
|
1999-04-16 03:35:26 +02:00
|
|
|
|
fp = FRAME_FP (frame);
|
2000-02-29 14:28:24 +01:00
|
|
|
|
i386_frame_init_saved_regs (frame);
|
|
|
|
|
|
1999-07-07 22:19:36 +02:00
|
|
|
|
for (regnum = 0; regnum < NUM_REGS; regnum++)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
2001-03-17 23:28:33 +01:00
|
|
|
|
CORE_ADDR addr;
|
|
|
|
|
addr = frame->saved_regs[regnum];
|
|
|
|
|
if (addr)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
2001-03-17 23:28:33 +01:00
|
|
|
|
read_memory (addr, regbuf, REGISTER_RAW_SIZE (regnum));
|
1999-04-16 03:35:26 +02:00
|
|
|
|
write_register_bytes (REGISTER_BYTE (regnum), regbuf,
|
|
|
|
|
REGISTER_RAW_SIZE (regnum));
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
write_register (FP_REGNUM, read_memory_integer (fp, 4));
|
|
|
|
|
write_register (PC_REGNUM, read_memory_integer (fp + 4, 4));
|
|
|
|
|
write_register (SP_REGNUM, fp + 8);
|
|
|
|
|
flush_cached_frames ();
|
|
|
|
|
}
|
2001-03-17 23:28:33 +01:00
|
|
|
|
|
1999-04-16 03:35:26 +02:00
|
|
|
|
|
|
|
|
|
#ifdef GET_LONGJMP_TARGET
|
|
|
|
|
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* Figure out where the longjmp will land. Slurp the args out of the
|
|
|
|
|
stack. We expect the first arg to be a pointer to the jmp_buf
|
|
|
|
|
structure from which we extract the pc (JB_PC) that we will land
|
|
|
|
|
at. The pc is copied into PC. This routine returns true on
|
|
|
|
|
success. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
|
|
|
|
|
int
|
2000-07-30 03:48:28 +02:00
|
|
|
|
get_longjmp_target (CORE_ADDR *pc)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
|
|
|
|
char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT];
|
|
|
|
|
CORE_ADDR sp, jb_addr;
|
|
|
|
|
|
|
|
|
|
sp = read_register (SP_REGNUM);
|
|
|
|
|
|
2001-03-17 23:28:33 +01:00
|
|
|
|
if (target_read_memory (sp + SP_ARG0, /* Offset of first arg on stack. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
buf,
|
|
|
|
|
TARGET_PTR_BIT / TARGET_CHAR_BIT))
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
jb_addr = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
|
|
|
|
|
|
|
|
|
|
if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf,
|
|
|
|
|
TARGET_PTR_BIT / TARGET_CHAR_BIT))
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
*pc = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
|
|
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#endif /* GET_LONGJMP_TARGET */
|
2001-03-17 23:28:33 +01:00
|
|
|
|
|
1999-04-16 03:35:26 +02:00
|
|
|
|
|
2001-03-26 14:11:14 +02:00
|
|
|
|
CORE_ADDR
|
2001-07-15 22:10:02 +02:00
|
|
|
|
i386_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
|
2001-03-26 14:11:14 +02:00
|
|
|
|
int struct_return, CORE_ADDR struct_addr)
|
|
|
|
|
{
|
|
|
|
|
sp = default_push_arguments (nargs, args, sp, struct_return, struct_addr);
|
|
|
|
|
|
|
|
|
|
if (struct_return)
|
|
|
|
|
{
|
|
|
|
|
char buf[4];
|
|
|
|
|
|
|
|
|
|
sp -= 4;
|
|
|
|
|
store_address (buf, 4, struct_addr);
|
|
|
|
|
write_memory (sp, buf, 4);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return sp;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
i386_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
|
|
|
|
|
{
|
|
|
|
|
/* Do nothing. Everything was already done by i386_push_arguments. */
|
|
|
|
|
}
|
|
|
|
|
|
2000-03-22 10:45:01 +01:00
|
|
|
|
/* These registers are used for returning integers (and on some
|
|
|
|
|
targets also for returning `struct' and `union' values when their
|
2000-12-21 21:52:59 +01:00
|
|
|
|
size and alignment match an integer type). */
|
2000-03-22 10:45:01 +01:00
|
|
|
|
#define LOW_RETURN_REGNUM 0 /* %eax */
|
|
|
|
|
#define HIGH_RETURN_REGNUM 2 /* %edx */
|
|
|
|
|
|
|
|
|
|
/* Extract from an array REGBUF containing the (raw) register state, a
|
|
|
|
|
function return value of TYPE, and copy that, in virtual format,
|
|
|
|
|
into VALBUF. */
|
|
|
|
|
|
1999-04-16 03:35:26 +02:00
|
|
|
|
void
|
2000-03-22 10:45:01 +01:00
|
|
|
|
i386_extract_return_value (struct type *type, char *regbuf, char *valbuf)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
2000-03-22 10:45:01 +01:00
|
|
|
|
int len = TYPE_LENGTH (type);
|
|
|
|
|
|
2001-03-31 15:05:16 +02:00
|
|
|
|
if (TYPE_CODE (type) == TYPE_CODE_STRUCT
|
|
|
|
|
&& TYPE_NFIELDS (type) == 1)
|
2001-04-04 17:09:46 +02:00
|
|
|
|
{
|
|
|
|
|
i386_extract_return_value (TYPE_FIELD_TYPE (type, 0), regbuf, valbuf);
|
|
|
|
|
return;
|
|
|
|
|
}
|
2001-03-31 15:05:16 +02:00
|
|
|
|
|
|
|
|
|
if (TYPE_CODE (type) == TYPE_CODE_FLT)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
2000-03-22 10:45:01 +01:00
|
|
|
|
if (NUM_FREGS == 0)
|
|
|
|
|
{
|
|
|
|
|
warning ("Cannot find floating-point return value.");
|
|
|
|
|
memset (valbuf, 0, len);
|
2000-12-21 21:52:59 +01:00
|
|
|
|
return;
|
2000-03-22 10:45:01 +01:00
|
|
|
|
}
|
|
|
|
|
|
2001-10-30 00:49:31 +01:00
|
|
|
|
/* Floating-point return values can be found in %st(0). Convert
|
|
|
|
|
its contents to the desired type. This is probably not
|
|
|
|
|
exactly how it would happen on the target itself, but it is
|
|
|
|
|
the best we can do. */
|
|
|
|
|
convert_typed_floating (®buf[REGISTER_BYTE (FP0_REGNUM)],
|
|
|
|
|
builtin_type_i387_ext, valbuf, type);
|
1999-04-16 03:35:26 +02:00
|
|
|
|
}
|
|
|
|
|
else
|
1999-07-07 22:19:36 +02:00
|
|
|
|
{
|
1999-09-09 02:02:17 +02:00
|
|
|
|
int low_size = REGISTER_RAW_SIZE (LOW_RETURN_REGNUM);
|
|
|
|
|
int high_size = REGISTER_RAW_SIZE (HIGH_RETURN_REGNUM);
|
|
|
|
|
|
|
|
|
|
if (len <= low_size)
|
2000-03-22 10:45:01 +01:00
|
|
|
|
memcpy (valbuf, ®buf[REGISTER_BYTE (LOW_RETURN_REGNUM)], len);
|
1999-09-09 02:02:17 +02:00
|
|
|
|
else if (len <= (low_size + high_size))
|
|
|
|
|
{
|
|
|
|
|
memcpy (valbuf,
|
2000-03-22 10:45:01 +01:00
|
|
|
|
®buf[REGISTER_BYTE (LOW_RETURN_REGNUM)], low_size);
|
1999-09-09 02:02:17 +02:00
|
|
|
|
memcpy (valbuf + low_size,
|
2000-03-22 10:45:01 +01:00
|
|
|
|
®buf[REGISTER_BYTE (HIGH_RETURN_REGNUM)], len - low_size);
|
1999-09-09 02:02:17 +02:00
|
|
|
|
}
|
|
|
|
|
else
|
2001-02-08 07:03:54 +01:00
|
|
|
|
internal_error (__FILE__, __LINE__,
|
|
|
|
|
"Cannot extract return value of %d bytes long.", len);
|
1999-04-16 03:35:26 +02:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2000-12-21 21:52:59 +01:00
|
|
|
|
/* Write into the appropriate registers a function return value stored
|
|
|
|
|
in VALBUF of type TYPE, given in virtual format. */
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
i386_store_return_value (struct type *type, char *valbuf)
|
|
|
|
|
{
|
|
|
|
|
int len = TYPE_LENGTH (type);
|
|
|
|
|
|
2001-03-31 15:05:16 +02:00
|
|
|
|
if (TYPE_CODE (type) == TYPE_CODE_STRUCT
|
|
|
|
|
&& TYPE_NFIELDS (type) == 1)
|
2001-04-04 17:09:46 +02:00
|
|
|
|
{
|
|
|
|
|
i386_store_return_value (TYPE_FIELD_TYPE (type, 0), valbuf);
|
|
|
|
|
return;
|
|
|
|
|
}
|
2001-03-31 15:05:16 +02:00
|
|
|
|
|
|
|
|
|
if (TYPE_CODE (type) == TYPE_CODE_FLT)
|
2000-12-21 21:52:59 +01:00
|
|
|
|
{
|
2001-07-11 10:43:41 +02:00
|
|
|
|
unsigned int fstat;
|
2001-10-30 00:49:31 +01:00
|
|
|
|
char buf[FPU_REG_RAW_SIZE];
|
2001-07-11 10:43:41 +02:00
|
|
|
|
|
2000-12-21 21:52:59 +01:00
|
|
|
|
if (NUM_FREGS == 0)
|
|
|
|
|
{
|
|
|
|
|
warning ("Cannot set floating-point return value.");
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
2001-07-12 20:50:01 +02:00
|
|
|
|
/* Returning floating-point values is a bit tricky. Apart from
|
|
|
|
|
storing the return value in %st(0), we have to simulate the
|
|
|
|
|
state of the FPU at function return point. */
|
|
|
|
|
|
2001-10-30 00:49:31 +01:00
|
|
|
|
/* Convert the value found in VALBUF to the extended
|
|
|
|
|
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. */
|
|
|
|
|
convert_typed_floating (valbuf, type, buf, builtin_type_i387_ext);
|
|
|
|
|
write_register_bytes (REGISTER_BYTE (FP0_REGNUM), buf,
|
|
|
|
|
FPU_REG_RAW_SIZE);
|
2001-07-11 10:43:41 +02:00
|
|
|
|
|
2001-07-12 20:50:01 +02:00
|
|
|
|
/* Set the top of the floating-point register stack to 7. The
|
|
|
|
|
actual value doesn't really matter, but 7 is what a normal
|
|
|
|
|
function return would end up with if the program started out
|
|
|
|
|
with a freshly initialized FPU. */
|
2001-07-11 10:43:41 +02:00
|
|
|
|
fstat = read_register (FSTAT_REGNUM);
|
|
|
|
|
fstat |= (7 << 11);
|
|
|
|
|
write_register (FSTAT_REGNUM, fstat);
|
|
|
|
|
|
2001-07-12 20:50:01 +02:00
|
|
|
|
/* Mark %st(1) through %st(7) as empty. Since we set the top of
|
|
|
|
|
the floating-point register stack to 7, the appropriate value
|
|
|
|
|
for the tag word is 0x3fff. */
|
2001-07-11 10:43:41 +02:00
|
|
|
|
write_register (FTAG_REGNUM, 0x3fff);
|
2000-12-21 21:52:59 +01:00
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
int low_size = REGISTER_RAW_SIZE (LOW_RETURN_REGNUM);
|
|
|
|
|
int high_size = REGISTER_RAW_SIZE (HIGH_RETURN_REGNUM);
|
|
|
|
|
|
|
|
|
|
if (len <= low_size)
|
|
|
|
|
write_register_bytes (REGISTER_BYTE (LOW_RETURN_REGNUM), valbuf, len);
|
|
|
|
|
else if (len <= (low_size + high_size))
|
|
|
|
|
{
|
|
|
|
|
write_register_bytes (REGISTER_BYTE (LOW_RETURN_REGNUM),
|
|
|
|
|
valbuf, low_size);
|
|
|
|
|
write_register_bytes (REGISTER_BYTE (HIGH_RETURN_REGNUM),
|
|
|
|
|
valbuf + low_size, len - low_size);
|
|
|
|
|
}
|
|
|
|
|
else
|
2001-02-08 07:03:54 +01:00
|
|
|
|
internal_error (__FILE__, __LINE__,
|
|
|
|
|
"Cannot store return value of %d bytes long.", len);
|
2000-12-21 21:52:59 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
2001-04-01 14:39:52 +02:00
|
|
|
|
|
|
|
|
|
/* Extract from an array REGBUF containing the (raw) register state
|
|
|
|
|
the address in which a function should return its structure value,
|
|
|
|
|
as a CORE_ADDR. */
|
|
|
|
|
|
|
|
|
|
CORE_ADDR
|
|
|
|
|
i386_extract_struct_value_address (char *regbuf)
|
|
|
|
|
{
|
|
|
|
|
return extract_address (®buf[REGISTER_BYTE (LOW_RETURN_REGNUM)],
|
|
|
|
|
REGISTER_RAW_SIZE (LOW_RETURN_REGNUM));
|
|
|
|
|
}
|
2001-03-17 23:28:33 +01:00
|
|
|
|
|
2000-12-21 21:52:59 +01:00
|
|
|
|
|
2001-05-09 11:58:45 +02:00
|
|
|
|
/* Return the GDB type object for the "standard" data type of data in
|
|
|
|
|
register REGNUM. Perhaps %esi and %edi should go here, but
|
|
|
|
|
potentially they could be used for things other than address. */
|
|
|
|
|
|
|
|
|
|
struct type *
|
|
|
|
|
i386_register_virtual_type (int regnum)
|
|
|
|
|
{
|
|
|
|
|
if (regnum == PC_REGNUM || regnum == FP_REGNUM || regnum == SP_REGNUM)
|
|
|
|
|
return lookup_pointer_type (builtin_type_void);
|
|
|
|
|
|
|
|
|
|
if (IS_FP_REGNUM (regnum))
|
2001-10-30 00:49:31 +01:00
|
|
|
|
return builtin_type_i387_ext;
|
2001-05-09 11:58:45 +02:00
|
|
|
|
|
|
|
|
|
if (IS_SSE_REGNUM (regnum))
|
|
|
|
|
return builtin_type_v4sf;
|
|
|
|
|
|
|
|
|
|
return builtin_type_int;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Return true iff register REGNUM's virtual format is different from
|
|
|
|
|
its raw format. Note that this definition assumes that the host
|
|
|
|
|
supports IEEE 32-bit floats, since it doesn't say that SSE
|
|
|
|
|
registers need conversion. Even if we can't find a counterexample,
|
|
|
|
|
this is still sloppy. */
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
i386_register_convertible (int regnum)
|
|
|
|
|
{
|
|
|
|
|
return IS_FP_REGNUM (regnum);
|
|
|
|
|
}
|
|
|
|
|
|
2000-03-26 23:21:50 +02:00
|
|
|
|
/* Convert data from raw format for register REGNUM in buffer FROM to
|
2001-07-28 18:48:59 +02:00
|
|
|
|
virtual format with type TYPE in buffer TO. */
|
2000-03-26 23:21:50 +02:00
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
i386_register_convert_to_virtual (int regnum, struct type *type,
|
|
|
|
|
char *from, char *to)
|
|
|
|
|
{
|
2001-10-30 00:49:31 +01:00
|
|
|
|
gdb_assert (IS_FP_REGNUM (regnum));
|
2001-07-28 18:48:59 +02:00
|
|
|
|
|
|
|
|
|
/* We only support floating-point values. */
|
2001-07-30 23:09:44 +02:00
|
|
|
|
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;
|
|
|
|
|
}
|
2001-07-28 18:48:59 +02:00
|
|
|
|
|
2001-10-30 00:49:31 +01:00
|
|
|
|
/* 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 (from, builtin_type_i387_ext, to, type);
|
2000-03-26 23:21:50 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Convert data from virtual format with type TYPE in buffer FROM to
|
2001-07-28 18:48:59 +02:00
|
|
|
|
raw format for register REGNUM in buffer TO. */
|
2000-03-26 23:21:50 +02:00
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
i386_register_convert_to_raw (struct type *type, int regnum,
|
|
|
|
|
char *from, char *to)
|
|
|
|
|
{
|
2001-10-30 00:49:31 +01:00
|
|
|
|
gdb_assert (IS_FP_REGNUM (regnum));
|
|
|
|
|
|
|
|
|
|
/* We only support floating-point values. */
|
|
|
|
|
if (TYPE_CODE (type) != TYPE_CODE_FLT)
|
|
|
|
|
{
|
|
|
|
|
warning ("Cannot convert non-floating-point type "
|
|
|
|
|
"to floating-point register value.");
|
|
|
|
|
memset (to, 0, TYPE_LENGTH (type));
|
|
|
|
|
return;
|
|
|
|
|
}
|
2001-07-28 18:48:59 +02:00
|
|
|
|
|
2001-10-30 00:49:31 +01:00
|
|
|
|
/* Convert from TYPE. This should be a no-op if TYPE is equivalent
|
|
|
|
|
to the extended floating-point format used by the FPU. */
|
|
|
|
|
convert_typed_floating (from, type, to, builtin_type_i387_ext);
|
2000-03-26 23:21:50 +02:00
|
|
|
|
}
|
|
|
|
|
|
2001-03-17 23:28:33 +01:00
|
|
|
|
|
1999-04-16 03:35:26 +02:00
|
|
|
|
#ifdef I386V4_SIGTRAMP_SAVED_PC
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* Get saved user PC for sigtramp from the pushed ucontext on the
|
|
|
|
|
stack for all three variants of SVR4 sigtramps. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
|
|
|
|
|
CORE_ADDR
|
2000-07-30 03:48:28 +02:00
|
|
|
|
i386v4_sigtramp_saved_pc (struct frame_info *frame)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
|
|
|
|
CORE_ADDR saved_pc_offset = 4;
|
|
|
|
|
char *name = NULL;
|
|
|
|
|
|
|
|
|
|
find_pc_partial_function (frame->pc, &name, NULL, NULL);
|
|
|
|
|
if (name)
|
|
|
|
|
{
|
|
|
|
|
if (STREQ (name, "_sigreturn"))
|
|
|
|
|
saved_pc_offset = 132 + 14 * 4;
|
|
|
|
|
else if (STREQ (name, "_sigacthandler"))
|
|
|
|
|
saved_pc_offset = 80 + 14 * 4;
|
|
|
|
|
else if (STREQ (name, "sigvechandler"))
|
|
|
|
|
saved_pc_offset = 120 + 14 * 4;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (frame->next)
|
|
|
|
|
return read_memory_integer (frame->next->frame + saved_pc_offset, 4);
|
|
|
|
|
return read_memory_integer (read_register (SP_REGNUM) + saved_pc_offset, 4);
|
|
|
|
|
}
|
|
|
|
|
#endif /* I386V4_SIGTRAMP_SAVED_PC */
|
2001-03-17 23:28:33 +01:00
|
|
|
|
|
1999-08-03 01:48:37 +02:00
|
|
|
|
|
1999-04-16 03:35:26 +02:00
|
|
|
|
#ifdef STATIC_TRANSFORM_NAME
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* SunPRO encodes the static variables. This is not related to C++
|
|
|
|
|
mangling, it is done for C too. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
|
|
|
|
|
char *
|
2000-07-30 03:48:28 +02:00
|
|
|
|
sunpro_static_transform_name (char *name)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
|
|
|
|
char *p;
|
|
|
|
|
if (IS_STATIC_TRANSFORM_NAME (name))
|
|
|
|
|
{
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* For file-local statics there will be a period, a bunch of
|
|
|
|
|
junk (the contents of which match a string given in the
|
1999-07-07 22:19:36 +02:00
|
|
|
|
N_OPT), a period and the name. For function-local statics
|
|
|
|
|
there will be a bunch of junk (which seems to change the
|
|
|
|
|
second character from 'A' to 'B'), a period, the name of the
|
|
|
|
|
function, and the name. So just skip everything before the
|
|
|
|
|
last period. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
p = strrchr (name, '.');
|
|
|
|
|
if (p != NULL)
|
|
|
|
|
name = p + 1;
|
|
|
|
|
}
|
|
|
|
|
return name;
|
|
|
|
|
}
|
|
|
|
|
#endif /* STATIC_TRANSFORM_NAME */
|
2001-03-17 23:28:33 +01:00
|
|
|
|
|
1999-04-16 03:35:26 +02:00
|
|
|
|
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* Stuff for WIN32 PE style DLL's but is pretty generic really. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
|
|
|
|
|
CORE_ADDR
|
2000-07-30 03:48:28 +02:00
|
|
|
|
skip_trampoline_code (CORE_ADDR pc, char *name)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
2001-03-17 23:28:33 +01:00
|
|
|
|
if (pc && read_memory_unsigned_integer (pc, 2) == 0x25ff) /* jmp *(dest) */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
1999-07-07 22:19:36 +02:00
|
|
|
|
unsigned long indirect = read_memory_unsigned_integer (pc + 2, 4);
|
1999-04-16 03:35:26 +02:00
|
|
|
|
struct minimal_symbol *indsym =
|
2001-03-17 23:28:33 +01:00
|
|
|
|
indirect ? lookup_minimal_symbol_by_pc (indirect) : 0;
|
1999-07-07 22:19:36 +02:00
|
|
|
|
char *symname = indsym ? SYMBOL_NAME (indsym) : 0;
|
1999-04-16 03:35:26 +02:00
|
|
|
|
|
1999-07-07 22:19:36 +02:00
|
|
|
|
if (symname)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
1999-07-07 22:19:36 +02:00
|
|
|
|
if (strncmp (symname, "__imp_", 6) == 0
|
|
|
|
|
|| strncmp (symname, "_imp_", 5) == 0)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
return name ? 1 : read_memory_unsigned_integer (indirect, 4);
|
|
|
|
|
}
|
|
|
|
|
}
|
2001-03-17 23:28:33 +01:00
|
|
|
|
return 0; /* Not a trampoline. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
}
|
2001-03-17 23:28:33 +01:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* We have two flavours of disassembly. The machinery on this page
|
|
|
|
|
deals with switching between those. */
|
1999-04-16 03:35:26 +02:00
|
|
|
|
|
|
|
|
|
static int
|
2000-07-30 03:48:28 +02:00
|
|
|
|
gdb_print_insn_i386 (bfd_vma memaddr, disassemble_info *info)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
|
|
|
|
if (disassembly_flavor == att_flavor)
|
|
|
|
|
return print_insn_i386_att (memaddr, info);
|
|
|
|
|
else if (disassembly_flavor == intel_flavor)
|
|
|
|
|
return print_insn_i386_intel (memaddr, info);
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* Never reached -- disassembly_flavour is always either att_flavor
|
|
|
|
|
or intel_flavor. */
|
2001-02-25 05:45:12 +01:00
|
|
|
|
internal_error (__FILE__, __LINE__, "failed internal consistency check");
|
1999-04-26 20:34:20 +02:00
|
|
|
|
}
|
|
|
|
|
|
2001-03-17 23:28:33 +01:00
|
|
|
|
|
1999-10-06 01:13:56 +02:00
|
|
|
|
|
2001-11-08 19:32:08 +01:00
|
|
|
|
struct gdbarch *
|
|
|
|
|
i386_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
|
|
|
|
|
{
|
|
|
|
|
struct gdbarch_tdep *tdep
|
|
|
|
|
struct gdbarch *gdbarch;
|
|
|
|
|
|
|
|
|
|
/* For the moment there is only one i386 architecture. */
|
|
|
|
|
if (arches != NULL)
|
|
|
|
|
return arches->gdbarch;
|
|
|
|
|
|
|
|
|
|
/* Allocate space for the new architecture. */
|
|
|
|
|
tdep = XMALLOC (struct gdbarch_tdep);
|
|
|
|
|
gdbarch = gdbarch_alloc (&info, tdep);
|
|
|
|
|
|
|
|
|
|
set_gdbarch_use_generic_dummy_frames (gdbarch, 0);
|
|
|
|
|
|
|
|
|
|
/* Call dummy code. */
|
|
|
|
|
set_gdbarch_call_dummy_location (gdbarch, ON_STACK);
|
|
|
|
|
set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 5);
|
|
|
|
|
set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1);
|
|
|
|
|
set_gdbarch_call_dummy_p (gdbarch, 1);
|
|
|
|
|
set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
|
|
|
|
|
|
|
|
|
|
set_gdbarch_get_saved_register (gdbarch, generic_get_saved_register);
|
|
|
|
|
set_gdbarch_push_arguments (gdbarch, i386_push_arguments);
|
|
|
|
|
|
|
|
|
|
set_gdbarch_pc_in_call_dummy (gdbarch, pc_in_call_dummy_on_stack);
|
|
|
|
|
|
|
|
|
|
/* NOTE: tm-i386nw.h and tm-i386v4.h override this. */
|
|
|
|
|
set_gdbarch_frame_chain_valid (gdbarch, file_frame_chain_valid);
|
|
|
|
|
|
|
|
|
|
return gdbarch;
|
|
|
|
|
}
|
|
|
|
|
|
2001-03-21 12:22:24 +01:00
|
|
|
|
/* Provide a prototype to silence -Wmissing-prototypes. */
|
|
|
|
|
void _initialize_i386_tdep (void);
|
|
|
|
|
|
1999-04-16 03:35:26 +02:00
|
|
|
|
void
|
2000-07-30 03:48:28 +02:00
|
|
|
|
_initialize_i386_tdep (void)
|
1999-04-16 03:35:26 +02:00
|
|
|
|
{
|
2001-11-08 19:32:08 +01:00
|
|
|
|
register_gdbarch_init (bfd_arch_i386, i386_gdbarch_init);
|
|
|
|
|
|
1999-10-19 04:47:02 +02:00
|
|
|
|
/* Initialize the table saying where each register starts in the
|
|
|
|
|
register file. */
|
|
|
|
|
{
|
|
|
|
|
int i, offset;
|
|
|
|
|
|
|
|
|
|
offset = 0;
|
|
|
|
|
for (i = 0; i < MAX_NUM_REGS; i++)
|
|
|
|
|
{
|
2001-11-04 14:51:48 +01:00
|
|
|
|
i386_register_offset[i] = offset;
|
|
|
|
|
offset += i386_register_size[i];
|
1999-10-19 04:47:02 +02:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
1999-04-16 03:35:26 +02:00
|
|
|
|
tm_print_insn = gdb_print_insn_i386;
|
|
|
|
|
tm_print_insn_info.mach = bfd_lookup_arch (bfd_arch_i386, 0)->mach;
|
|
|
|
|
|
2001-03-17 23:28:33 +01:00
|
|
|
|
/* Add the variable that controls the disassembly flavor. */
|
1999-10-19 04:47:02 +02:00
|
|
|
|
{
|
|
|
|
|
struct cmd_list_element *new_cmd;
|
1999-04-26 20:34:20 +02:00
|
|
|
|
|
1999-10-19 04:47:02 +02:00
|
|
|
|
new_cmd = add_set_enum_cmd ("disassembly-flavor", no_class,
|
|
|
|
|
valid_flavors,
|
2000-05-16 05:03:13 +02:00
|
|
|
|
&disassembly_flavor,
|
2001-03-17 23:28:33 +01:00
|
|
|
|
"\
|
|
|
|
|
Set the disassembly flavor, the valid values are \"att\" and \"intel\", \
|
1999-04-16 03:35:26 +02:00
|
|
|
|
and the default value is \"att\".",
|
1999-10-19 04:47:02 +02:00
|
|
|
|
&setlist);
|
|
|
|
|
add_show_from_set (new_cmd, &showlist);
|
|
|
|
|
}
|
1999-04-16 03:35:26 +02:00
|
|
|
|
}
|