/* Intel 386 target-dependent stuff.
- Copyright (C) 1988, 1989, 1991, 1994 Free Software Foundation, Inc.
+ Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
+ 1998, 1999, 2000, 2001
+ Free Software Foundation, Inc.
-This file is part of GDB.
+ This file is part of GDB.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
#include "defs.h"
+#include "gdb_string.h"
#include "frame.h"
#include "inferior.h"
#include "gdbcore.h"
#include "target.h"
#include "floatformat.h"
#include "symtab.h"
+#include "gdbcmd.h"
+#include "command.h"
+#include "arch-utils.h"
+#include "regcache.h"
-static long
-i386_get_frame_setup PARAMS ((int));
+static long i386_get_frame_setup (CORE_ADDR);
-static void
-i386_follow_jump PARAMS ((void));
+static void i386_follow_jump (void);
-static void
-codestream_read PARAMS ((unsigned char *, int));
+static void codestream_read (unsigned char *, int);
-static void
-codestream_seek PARAMS ((int));
+static void codestream_seek (CORE_ADDR);
+
+static unsigned char codestream_fill (int);
+
+CORE_ADDR skip_trampoline_code (CORE_ADDR, char *);
+
+static int gdb_print_insn_i386 (bfd_vma, disassemble_info *);
+
+void _initialize_i386_tdep (void);
+
+/* i386_register_byte[i] is the offset into the register file of the
+ start of register number i. We initialize this from
+ i386_register_raw_size. */
+int i386_register_byte[MAX_NUM_REGS];
+
+/* i386_register_raw_size[i] is the number of bytes of storage in
+ GDB's register array occupied by register i. */
+int i386_register_raw_size[MAX_NUM_REGS] = {
+ 4, 4, 4, 4,
+ 4, 4, 4, 4,
+ 4, 4, 4, 4,
+ 4, 4, 4, 4,
+ 10, 10, 10, 10,
+ 10, 10, 10, 10,
+ 4, 4, 4, 4,
+ 4, 4, 4, 4,
+ 16, 16, 16, 16,
+ 16, 16, 16, 16,
+ 4
+};
-static unsigned char
-codestream_fill PARAMS ((int));
+/* i386_register_virtual_size[i] is the size in bytes of the virtual
+ type of register i. */
+int i386_register_virtual_size[MAX_NUM_REGS];
-/* helper functions for tm-i386.h */
+
+/* This is the variable the is set with "set disassembly-flavor",
+ and its legitimate values. */
+static const char att_flavor[] = "att";
+static const char intel_flavor[] = "intel";
+static const char *valid_flavors[] =
+{
+ att_flavor,
+ intel_flavor,
+ NULL
+};
+static const char *disassembly_flavor = att_flavor;
+
+static void i386_print_register (char *, int, int);
+
+/* This is used to keep the bfd arch_info in sync with the disassembly flavor. */
+static void set_disassembly_flavor_sfunc (char *, int,
+ struct cmd_list_element *);
+static void set_disassembly_flavor (void);
/* Stdio style buffering was used to minimize calls to ptrace, but this
buffering did not take into account that the code section being accessed
#define codestream_get() (codestream_cnt-- == 0 ? \
codestream_fill(0) : codestream_buf[codestream_off++])
-static unsigned char
-codestream_fill (peek_flag)
- int peek_flag;
+static unsigned char
+codestream_fill (int peek_flag)
{
codestream_addr = codestream_next_addr;
codestream_next_addr += CODESTREAM_BUFSIZ;
codestream_off = 0;
codestream_cnt = CODESTREAM_BUFSIZ;
read_memory (codestream_addr, (char *) codestream_buf, CODESTREAM_BUFSIZ);
-
+
if (peek_flag)
- return (codestream_peek());
+ return (codestream_peek ());
else
- return (codestream_get());
+ return (codestream_get ());
}
static void
-codestream_seek (place)
- int place;
+codestream_seek (CORE_ADDR place)
{
codestream_next_addr = place / CODESTREAM_BUFSIZ;
codestream_next_addr *= CODESTREAM_BUFSIZ;
codestream_cnt = 0;
codestream_fill (1);
- while (codestream_tell() != place)
+ while (codestream_tell () != place)
codestream_get ();
}
static void
-codestream_read (buf, count)
- unsigned char *buf;
- int count;
+codestream_read (unsigned char *buf, int count)
{
unsigned char *p;
int i;
/* next instruction is a jump, move to target */
static void
-i386_follow_jump ()
+i386_follow_jump (void)
{
unsigned char buf[4];
long delta;
delta = extract_signed_integer (buf, 2);
/* include size of jmp inst (including the 0x66 prefix). */
- pos += delta + 4;
+ pos += delta + 4;
}
else
{
*/
static long
-i386_get_frame_setup (pc)
- int pc;
+i386_get_frame_setup (CORE_ADDR pc)
{
unsigned char op;
/*
* this function must start with
*
- * popl %eax 0x58
+ * popl %eax 0x58
* xchgl %eax, (%esp) 0x87 0x04 0x24
* or xchgl %eax, 0(%esp) 0x87 0x44 0x24 0x00
*
*/
int pos;
unsigned char buf[4];
- static unsigned char proto1[3] = { 0x87,0x04,0x24 };
- static unsigned char proto2[4] = { 0x87,0x44,0x24,0x00 };
+ static unsigned char proto1[3] =
+ {0x87, 0x04, 0x24};
+ static unsigned char proto2[4] =
+ {0x87, 0x44, 0x24, 0x00};
pos = codestream_tell ();
codestream_read (buf, 4);
if (memcmp (buf, proto1, 3) == 0)
pos += 4;
codestream_seek (pos);
- op = codestream_get (); /* update next opcode */
+ op = codestream_get (); /* update next opcode */
+ }
+
+ if (op == 0x68 || op == 0x6a)
+ {
+ /*
+ * this function may start with
+ *
+ * pushl constant
+ * call _probe
+ * addl $4, %esp
+ * followed by
+ * pushl %ebp
+ * etc.
+ */
+ int pos;
+ unsigned char buf[8];
+
+ /* Skip past the pushl instruction; it has either a one-byte
+ or a four-byte operand, depending on the opcode. */
+ pos = codestream_tell ();
+ if (op == 0x68)
+ pos += 4;
+ else
+ pos += 1;
+ codestream_seek (pos);
+
+ /* Read the following 8 bytes, which should be "call _probe" (6 bytes)
+ followed by "addl $4,%esp" (2 bytes). */
+ codestream_read (buf, sizeof (buf));
+ if (buf[0] == 0xe8 && buf[6] == 0xc4 && buf[7] == 0x4)
+ pos += sizeof (buf);
+ codestream_seek (pos);
+ op = codestream_get (); /* update next opcode */
}
if (op == 0x55) /* pushl %ebp */
- {
+ {
/* check for movl %esp, %ebp - can be written two ways */
switch (codestream_get ())
{
return (-1);
}
/* check for stack adjustment
- *
+
* subl $XXX, %esp
*
* note: you can't subtract a 16 bit immediate
/* subl with signed byte immediate
* (though it wouldn't make sense to be negative)
*/
- return (codestream_get());
+ return (codestream_get ());
}
else if (op == 0x81)
{
char buf[4];
/* Maybe it is subl with 32 bit immedediate. */
- codestream_get();
+ codestream_get ();
if (codestream_get () != 0xec)
/* Some instruction starting with 0x81 other than subl. */
{
return 0;
}
/* It is subl with 32 bit immediate. */
- codestream_read ((unsigned char *)buf, 4);
+ codestream_read ((unsigned char *) buf, 4);
return extract_signed_integer (buf, 4);
}
else
{
char buf[2];
/* enter instruction: arg is 16 bit unsigned immed */
- codestream_read ((unsigned char *)buf, 2);
- codestream_get (); /* flush final byte of enter instruction */
+ codestream_read ((unsigned char *) buf, 2);
+ codestream_get (); /* flush final byte of enter instruction */
return extract_unsigned_integer (buf, 2);
}
return (-1);
Can return -1, meaning no way to tell. */
int
-i386_frame_num_args (fi)
- struct frame_info *fi;
+i386_frame_num_args (struct frame_info *fi)
{
#if 1
return -1;
this call and a previous one, and we would say there are more args
than there really are. */
- int retpc;
- unsigned char op;
+ int retpc;
+ unsigned char op;
struct frame_info *pfi;
/* on the 386, the instruction following the call could be:
int frameless;
- FRAMELESS_FUNCTION_INVOCATION (fi, frameless);
+ frameless = FRAMELESS_FUNCTION_INVOCATION (fi);
if (frameless)
/* 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. */
return -1;
- pfi = get_prev_frame_info (fi);
+ pfi = get_prev_frame (fi);
if (pfi == 0)
{
/* 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. */
+ 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. */
return -1;
}
else
{
- retpc = pfi->pc;
- op = read_memory_integer (retpc, 1);
- if (op == 0x59)
- /* pop %ecx */
- return 1;
+ retpc = pfi->pc;
+ op = read_memory_integer (retpc, 1);
+ if (op == 0x59)
+ /* pop %ecx */
+ return 1;
else if (op == 0x83)
{
- 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;
+ 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;
else
return 0;
}
else if (op == 0x81)
- { /* add with 32 bit immediate */
- op = read_memory_integer (retpc+1, 1);
- if (op == 0xc4)
- /* addl $<imm 32>, %esp */
- return read_memory_integer (retpc+2, 4) / 4;
+ { /* add with 32 bit immediate */
+ op = read_memory_integer (retpc + 1, 1);
+ if (op == 0xc4)
+ /* addl $<imm 32>, %esp */
+ return read_memory_integer (retpc + 2, 4) / 4;
else
return 0;
}
*/
void
-i386_frame_find_saved_regs (fip, fsrp)
- struct frame_info *fip;
- struct frame_saved_regs *fsrp;
+i386_frame_init_saved_regs (struct frame_info *fip)
{
- long locals;
+ long locals = -1;
unsigned char op;
CORE_ADDR dummy_bottom;
CORE_ADDR adr;
+ CORE_ADDR pc;
int i;
-
- memset (fsrp, 0, sizeof *fsrp);
-
+
+ if (fip->saved_regs)
+ return;
+
+ frame_saved_regs_zalloc (fip);
+
/* if frame is the end of a dummy, compute where the
* beginning would be
*/
dummy_bottom = fip->frame - 4 - REGISTER_BYTES - CALL_DUMMY_LENGTH;
-
+
/* check if the PC is in the stack, in a dummy frame */
- if (dummy_bottom <= fip->pc && fip->pc <= fip->frame)
+ if (dummy_bottom <= fip->pc && fip->pc <= fip->frame)
{
/* all regs were saved by push_call_dummy () */
adr = fip->frame;
- for (i = 0; i < NUM_REGS; i++)
+ for (i = 0; i < NUM_REGS; i++)
{
adr -= REGISTER_RAW_SIZE (i);
- fsrp->regs[i] = adr;
+ fip->saved_regs[i] = adr;
}
return;
}
-
- locals = i386_get_frame_setup (get_pc_function_start (fip->pc));
-
- if (locals >= 0)
+
+ pc = get_pc_function_start (fip->pc);
+ if (pc != 0)
+ locals = i386_get_frame_setup (pc);
+
+ if (locals >= 0)
{
adr = fip->frame - 4 - locals;
- for (i = 0; i < 8; i++)
+ for (i = 0; i < 8; i++)
{
op = codestream_get ();
if (op < 0x50 || op > 0x57)
break;
- fsrp->regs[op - 0x50] = adr;
+#ifdef I386_REGNO_TO_SYMMETRY
+ /* Dynix uses different internal numbering. Ick. */
+ fip->saved_regs[I386_REGNO_TO_SYMMETRY (op - 0x50)] = adr;
+#else
+ fip->saved_regs[op - 0x50] = adr;
+#endif
adr -= 4;
}
}
-
- fsrp->regs[PC_REGNUM] = fip->frame + 4;
- fsrp->regs[FP_REGNUM] = fip->frame;
+
+ fip->saved_regs[PC_REGNUM] = fip->frame + 4;
+ fip->saved_regs[FP_REGNUM] = fip->frame;
}
/* return pc of first real instruction */
int
-i386_skip_prologue (pc)
- int pc;
+i386_skip_prologue (int pc)
{
unsigned char op;
int i;
- static unsigned char pic_pat[6] = { 0xe8, 0, 0, 0, 0, /* call 0x0 */
- 0x5b, /* popl %ebx */
- };
+ static unsigned char pic_pat[6] =
+ {0xe8, 0, 0, 0, 0, /* call 0x0 */
+ 0x5b, /* popl %ebx */
+ };
CORE_ADDR pos;
-
+
if (i386_get_frame_setup (pc) < 0)
return (pc);
-
+
/* found valid frame setup - codestream now points to
* start of push instructions for saving registers
*/
-
+
/* skip over register saves */
for (i = 0; i < 8; i++)
{
op = codestream_peek ();
/* break if not pushl inst */
- if (op < 0x50 || op > 0x57)
+ if (op < 0x50 || op > 0x57)
break;
codestream_get ();
}
/* 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
+ call 0x0
+ popl %ebx
+ movl %ebx,x(%ebp) (optional)
+ addl y,%ebx
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. */
-
+
pos = codestream_tell ();
for (i = 0; i < 6; i++)
{
op = codestream_get ();
- if (pic_pat [i] != op)
+ if (pic_pat[i] != op)
break;
}
if (i == 6)
long delta = 6;
op = codestream_get ();
- if (op == 0x89) /* movl %ebx, x(%ebp) */
+ if (op == 0x89) /* movl %ebx, x(%ebp) */
{
op = codestream_get ();
- if (op == 0x5d) /* one byte offset from %ebp */
+ if (op == 0x5d) /* one byte offset from %ebp */
{
delta += 3;
codestream_read (buf, 1);
}
- else if (op == 0x9d) /* four byte offset from %ebp */
+ else if (op == 0x9d) /* four byte offset from %ebp */
{
delta += 6;
codestream_read (buf, 4);
}
- else /* unexpected instruction */
- delta = -1;
- op = codestream_get ();
+ else /* unexpected instruction */
+ delta = -1;
+ op = codestream_get ();
}
- /* addl y,%ebx */
- if (delta > 0 && op == 0x81 && codestream_get () == 0xc3)
+ /* addl y,%ebx */
+ if (delta > 0 && op == 0x81 && codestream_get () == 0xc3)
{
- pos += delta + 6;
+ pos += delta + 6;
}
}
codestream_seek (pos);
-
+
i386_follow_jump ();
-
+
return (codestream_tell ());
}
void
-i386_push_dummy_frame ()
+i386_push_dummy_frame (void)
{
CORE_ADDR sp = read_register (SP_REGNUM);
int regnum;
char regbuf[MAX_REGISTER_RAW_SIZE];
-
+
sp = push_word (sp, read_register (PC_REGNUM));
sp = push_word (sp, read_register (FP_REGNUM));
write_register (FP_REGNUM, sp);
write_register (SP_REGNUM, sp);
}
+/* 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,
+ value_ptr *args, struct type *type, int gcc_p)
+{
+ 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);
+}
+
void
-i386_pop_frame ()
+i386_pop_frame (void)
{
- FRAME frame = get_current_frame ();
+ struct frame_info *frame = get_current_frame ();
CORE_ADDR fp;
int regnum;
- struct frame_saved_regs fsr;
- struct frame_info *fi;
char regbuf[MAX_REGISTER_RAW_SIZE];
-
- fi = get_frame_info (frame);
- fp = fi->frame;
- get_frame_saved_regs (fi, &fsr);
- for (regnum = 0; regnum < NUM_REGS; regnum++)
+
+ fp = FRAME_FP (frame);
+ i386_frame_init_saved_regs (frame);
+
+ for (regnum = 0; regnum < NUM_REGS; regnum++)
{
CORE_ADDR adr;
- adr = fsr.regs[regnum];
+ adr = frame->saved_regs[regnum];
if (adr)
{
read_memory (adr, regbuf, REGISTER_RAW_SIZE (regnum));
write_register (PC_REGNUM, read_memory_integer (fp + 4, 4));
write_register (SP_REGNUM, fp + 8);
flush_cached_frames ();
- set_current_frame ( create_new_frame (read_register (FP_REGNUM),
- read_pc ()));
}
#ifdef GET_LONGJMP_TARGET
This routine returns true on success. */
int
-get_longjmp_target(pc)
- CORE_ADDR *pc;
+get_longjmp_target (CORE_ADDR *pc)
{
char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT];
CORE_ADDR sp, jb_addr;
sp = read_register (SP_REGNUM);
- if (target_read_memory (sp + SP_ARG0, /* Offset of first arg on stack */
+ if (target_read_memory (sp + SP_ARG0, /* Offset of first arg on stack */
buf,
TARGET_PTR_BIT / TARGET_CHAR_BIT))
return 0;
#endif /* GET_LONGJMP_TARGET */
-#ifdef I386_AIX_TARGET
-/* On AIX, floating point values are returned in floating point registers. */
+/* These registers are used for returning integers (and on some
+ targets also for returning `struct' and `union' values when their
+ size and alignment match an integer type). */
+#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. */
void
-i386_extract_return_value(type, regbuf, valbuf)
- struct type *type;
- char regbuf[REGISTER_BYTES];
- char *valbuf;
+i386_extract_return_value (struct type *type, char *regbuf, char *valbuf)
{
- if (TYPE_CODE_FLT == TYPE_CODE(type))
+ int len = TYPE_LENGTH (type);
+
+ if (TYPE_CODE_FLT == TYPE_CODE (type))
{
- double d;
- /* 387 %st(0), gcc uses this */
- floatformat_to_double (&floatformat_i387_ext,
- ®buf[REGISTER_BYTE(FP0_REGNUM)],
- &d);
- store_floating (valbuf, TYPE_LENGTH (type), d);
+ if (NUM_FREGS == 0)
+ {
+ warning ("Cannot find floating-point return value.");
+ memset (valbuf, 0, len);
+ return;
+ }
+
+ /* Floating-point return values can be found in %st(0). */
+ if (len == TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT
+ && TARGET_LONG_DOUBLE_FORMAT == &floatformat_i387_ext)
+ {
+ /* Copy straight over, but take care of the padding. */
+ memcpy (valbuf, ®buf[REGISTER_BYTE (FP0_REGNUM)],
+ FPU_REG_RAW_SIZE);
+ memset (valbuf + FPU_REG_RAW_SIZE, 0, len - FPU_REG_RAW_SIZE);
+ }
+ else
+ {
+ /* Convert the extended floating-point number found in
+ %st(0) 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. */
+ DOUBLEST val;
+ floatformat_to_doublest (&floatformat_i387_ext,
+ ®buf[REGISTER_BYTE (FP0_REGNUM)], &val);
+ store_floating (valbuf, TYPE_LENGTH (type), val);
+ }
}
else
- {
- memcpy (valbuf, regbuf, TYPE_LENGTH (type));
+ {
+ int low_size = REGISTER_RAW_SIZE (LOW_RETURN_REGNUM);
+ int high_size = REGISTER_RAW_SIZE (HIGH_RETURN_REGNUM);
+
+ if (len <= low_size)
+ memcpy (valbuf, ®buf[REGISTER_BYTE (LOW_RETURN_REGNUM)], len);
+ else if (len <= (low_size + high_size))
+ {
+ memcpy (valbuf,
+ ®buf[REGISTER_BYTE (LOW_RETURN_REGNUM)], low_size);
+ memcpy (valbuf + low_size,
+ ®buf[REGISTER_BYTE (HIGH_RETURN_REGNUM)], len - low_size);
+ }
+ else
+ internal_error (__FILE__, __LINE__,
+ "Cannot extract return value of %d bytes long.", len);
+ }
+}
+
+/* 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);
+
+ if (TYPE_CODE_FLT == TYPE_CODE (type))
+ {
+ if (NUM_FREGS == 0)
+ {
+ warning ("Cannot set floating-point return value.");
+ return;
+ }
+
+ /* Floating-point return values can be found in %st(0). */
+ if (len == TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT
+ && TARGET_LONG_DOUBLE_FORMAT == &floatformat_i387_ext)
+ {
+ /* Copy straight over. */
+ write_register_bytes (REGISTER_BYTE (FP0_REGNUM), valbuf,
+ FPU_REG_RAW_SIZE);
+ }
+ else
+ {
+ char buf[FPU_REG_RAW_SIZE];
+ DOUBLEST val;
+
+ /* 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. */
+ val = extract_floating (valbuf, TYPE_LENGTH (type));
+ floatformat_from_doublest (&floatformat_i387_ext, &val, buf);
+ write_register_bytes (REGISTER_BYTE (FP0_REGNUM), buf,
+ FPU_REG_RAW_SIZE);
+ }
}
+ 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
+ internal_error (__FILE__, __LINE__,
+ "Cannot store return value of %d bytes long.", len);
+ }
+}
+
+/* Convert data from raw format for register REGNUM in buffer FROM to
+ virtual format with type TYPE in buffer TO. In principle both
+ formats are identical except that the virtual format has two extra
+ bytes appended that aren't used. We set these to zero. */
+
+void
+i386_register_convert_to_virtual (int regnum, struct type *type,
+ char *from, char *to)
+{
+ /* Copy straight over, but take care of the padding. */
+ memcpy (to, from, FPU_REG_RAW_SIZE);
+ memset (to + FPU_REG_RAW_SIZE, 0, TYPE_LENGTH (type) - FPU_REG_RAW_SIZE);
+}
+
+/* Convert data from virtual format with type TYPE in buffer FROM to
+ raw format for register REGNUM in buffer TO. Simply omit the two
+ unused bytes. */
+
+void
+i386_register_convert_to_raw (struct type *type, int regnum,
+ char *from, char *to)
+{
+ memcpy (to, from, FPU_REG_RAW_SIZE);
}
-#endif /* I386_AIX_TARGET */
+\f
#ifdef I386V4_SIGTRAMP_SAVED_PC
/* Get saved user PC for sigtramp from the pushed ucontext on the stack
for all three variants of SVR4 sigtramps. */
CORE_ADDR
-i386v4_sigtramp_saved_pc (frame)
- FRAME frame;
+i386v4_sigtramp_saved_pc (struct frame_info *frame)
{
CORE_ADDR saved_pc_offset = 4;
char *name = NULL;
- find_pc_partial_function (frame->pc, &name,
- (CORE_ADDR *)NULL,(CORE_ADDR *)NULL);
+ find_pc_partial_function (frame->pc, &name, NULL, NULL);
if (name)
{
if (STREQ (name, "_sigreturn"))
return read_memory_integer (read_register (SP_REGNUM) + saved_pc_offset, 4);
}
#endif /* I386V4_SIGTRAMP_SAVED_PC */
+
+
+#ifdef STATIC_TRANSFORM_NAME
+/* SunPRO encodes the static variables. This is not related to C++ mangling,
+ it is done for C too. */
+
+char *
+sunpro_static_transform_name (char *name)
+{
+ char *p;
+ if (IS_STATIC_TRANSFORM_NAME (name))
+ {
+ /* For file-local statics there will be a period, a bunch
+ of junk (the contents of which match a string given in the
+ 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. */
+ p = strrchr (name, '.');
+ if (p != NULL)
+ name = p + 1;
+ }
+ return name;
+}
+#endif /* STATIC_TRANSFORM_NAME */
+
+
+
+/* Stuff for WIN32 PE style DLL's but is pretty generic really. */
+
+CORE_ADDR
+skip_trampoline_code (CORE_ADDR pc, char *name)
+{
+ if (pc && read_memory_unsigned_integer (pc, 2) == 0x25ff) /* jmp *(dest) */
+ {
+ unsigned long indirect = read_memory_unsigned_integer (pc + 2, 4);
+ struct minimal_symbol *indsym =
+ indirect ? lookup_minimal_symbol_by_pc (indirect) : 0;
+ char *symname = indsym ? SYMBOL_NAME (indsym) : 0;
+
+ if (symname)
+ {
+ if (strncmp (symname, "__imp_", 6) == 0
+ || strncmp (symname, "_imp_", 5) == 0)
+ return name ? 1 : read_memory_unsigned_integer (indirect, 4);
+ }
+ }
+ return 0; /* not a trampoline */
+}
+
+static int
+gdb_print_insn_i386 (bfd_vma memaddr, disassemble_info *info)
+{
+ 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);
+ /* Never reached - disassembly_flavour is always either att_flavor
+ or intel_flavor */
+ internal_error (__FILE__, __LINE__, "failed internal consistency check");
+}
+
+/* If the disassembly mode is intel, we have to also switch the
+ bfd mach_type. This function is run in the set disassembly_flavor
+ command, and does that. */
+
+static void
+set_disassembly_flavor_sfunc (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ set_disassembly_flavor ();
+}
+
+static void
+set_disassembly_flavor (void)
+{
+ if (disassembly_flavor == att_flavor)
+ set_architecture_from_arch_mach (bfd_arch_i386, bfd_mach_i386_i386);
+ else if (disassembly_flavor == intel_flavor)
+ set_architecture_from_arch_mach (bfd_arch_i386, bfd_mach_i386_i386_intel_syntax);
+}
+
+
+void
+_initialize_i386_tdep (void)
+{
+ /* 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++)
+ {
+ i386_register_byte[i] = offset;
+ offset += i386_register_raw_size[i];
+ }
+ }
+
+ /* Initialize the table of virtual register sizes. */
+ {
+ int i;
+
+ for (i = 0; i < MAX_NUM_REGS; i++)
+ i386_register_virtual_size[i] = TYPE_LENGTH (REGISTER_VIRTUAL_TYPE (i));
+ }
+
+ tm_print_insn = gdb_print_insn_i386;
+ tm_print_insn_info.mach = bfd_lookup_arch (bfd_arch_i386, 0)->mach;
+
+ /* Add the variable that controls the disassembly flavor */
+ {
+ struct cmd_list_element *new_cmd;
+
+ new_cmd = add_set_enum_cmd ("disassembly-flavor", no_class,
+ valid_flavors,
+ &disassembly_flavor,
+ "Set the disassembly flavor, the valid values are \"att\" and \"intel\", \
+and the default value is \"att\".",
+ &setlist);
+ new_cmd->function.sfunc = set_disassembly_flavor_sfunc;
+ add_show_from_set (new_cmd, &showlist);
+ }
+
+ /* Finally, initialize the disassembly flavor to the default given
+ in the disassembly_flavor variable */
+
+ set_disassembly_flavor ();
+}
projects / deliverable / binutils-gdb.git / blobdiff