mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-30 05:23:49 +08:00
56eec3c737
but not the others. * symm-tdep.c: Remove exec_file_command. [_SEQUENT_] (ptx_coff_regno_to_gdb, register_addr): New functions. A few miscellaneous cleanups. * symm-nat.c: Renamed from symm-xdep.c. * All symmetry dependent files: Many changes.
490 lines
12 KiB
C
490 lines
12 KiB
C
/* Sequent Symmetry target interface, for GDB when running under Unix.
|
|
Copyright (C) 1986, 1987, 1989, 1991 Free Software Foundation, Inc.
|
|
|
|
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 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. */
|
|
|
|
/* many 387-specific items of use taken from i386-dep.c */
|
|
|
|
#include "defs.h"
|
|
#include "frame.h"
|
|
#include "inferior.h"
|
|
#include "symtab.h"
|
|
|
|
#include <signal.h>
|
|
#include <sys/param.h>
|
|
#include <sys/user.h>
|
|
#include <sys/dir.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/stat.h>
|
|
#include "gdbcore.h"
|
|
#include <fcntl.h>
|
|
|
|
static long i386_get_frame_setup ();
|
|
static i386_follow_jump ();
|
|
|
|
#include <sgtty.h>
|
|
#define TERMINAL struct sgttyb
|
|
|
|
/* rounds 'one' up to divide evenly by 'two' */
|
|
|
|
int
|
|
round(one,two)
|
|
register int one, two;
|
|
|
|
{
|
|
register int temp;
|
|
temp = (one/two)*two;
|
|
if (one != temp) {
|
|
temp += two;
|
|
}
|
|
return temp;
|
|
}
|
|
|
|
|
|
static CORE_ADDR codestream_next_addr;
|
|
static CORE_ADDR codestream_addr;
|
|
static unsigned char codestream_buf[sizeof (int)];
|
|
static int codestream_off;
|
|
static int codestream_cnt;
|
|
|
|
#define codestream_tell() (codestream_addr + codestream_off)
|
|
#define codestream_peek() (codestream_cnt == 0 ? \
|
|
codestream_fill(1): codestream_buf[codestream_off])
|
|
#define codestream_get() (codestream_cnt-- == 0 ? \
|
|
codestream_fill(0) : codestream_buf[codestream_off++])
|
|
|
|
|
|
static unsigned char
|
|
codestream_fill (peek_flag)
|
|
{
|
|
codestream_addr = codestream_next_addr;
|
|
codestream_next_addr += sizeof (int);
|
|
codestream_off = 0;
|
|
codestream_cnt = sizeof (int);
|
|
read_memory (codestream_addr,
|
|
(unsigned char *)codestream_buf,
|
|
sizeof (int));
|
|
|
|
if (peek_flag)
|
|
return (codestream_peek());
|
|
else
|
|
return (codestream_get());
|
|
}
|
|
|
|
static void
|
|
codestream_seek (place)
|
|
{
|
|
codestream_next_addr = place & -sizeof (int);
|
|
codestream_cnt = 0;
|
|
codestream_fill (1);
|
|
while (codestream_tell() != place)
|
|
codestream_get ();
|
|
}
|
|
|
|
static void
|
|
codestream_read (buf, count)
|
|
unsigned char *buf;
|
|
{
|
|
unsigned char *p;
|
|
int i;
|
|
p = buf;
|
|
for (i = 0; i < count; i++)
|
|
*p++ = codestream_get ();
|
|
}
|
|
|
|
/*
|
|
* Following macro translates i386 opcode register numbers to Symmetry
|
|
* register numbers. This is used by FRAME_FIND_SAVED_REGS.
|
|
*
|
|
* %eax %ecx %edx %ebx %esp %ebp %esi %edi
|
|
* i386 0 1 2 3 4 5 6 7
|
|
* Symmetry 0 2 1 5 14 15 6 7
|
|
*
|
|
*/
|
|
#define I386_REGNO_TO_SYMMETRY(n) \
|
|
((n)==0?0 :(n)==1?2 :(n)==2?1 :(n)==3?5 :(n)==4?14 :(n)==5?15 :(n))
|
|
|
|
/* from i386-dep.c */
|
|
i386_frame_find_saved_regs (fip, fsrp)
|
|
struct frame_info *fip;
|
|
struct frame_saved_regs *fsrp;
|
|
{
|
|
unsigned long locals;
|
|
unsigned char *p;
|
|
unsigned char op;
|
|
CORE_ADDR dummy_bottom;
|
|
CORE_ADDR adr;
|
|
int i;
|
|
|
|
memset (fsrp, 0, sizeof *fsrp);
|
|
|
|
/* if frame is the end of a dummy, compute where the
|
|
* beginning would be
|
|
*/
|
|
dummy_bottom = fip->frame - 4 - NUM_REGS*4 - CALL_DUMMY_LENGTH;
|
|
|
|
/* check if the PC is in the stack, in a dummy frame */
|
|
if (dummy_bottom <= fip->pc && fip->pc <= fip->frame)
|
|
{
|
|
/* all regs were saved by push_call_dummy () */
|
|
adr = fip->frame - 4;
|
|
for (i = 0; i < NUM_REGS; i++)
|
|
{
|
|
fsrp->regs[i] = adr;
|
|
adr -= 4;
|
|
}
|
|
return;
|
|
}
|
|
|
|
locals = i386_get_frame_setup (get_pc_function_start (fip->pc));
|
|
|
|
if (locals >= 0)
|
|
{
|
|
adr = fip->frame - 4 - locals;
|
|
for (i = 0; i < 8; i++)
|
|
{
|
|
op = codestream_get ();
|
|
if (op < 0x50 || op > 0x57)
|
|
break;
|
|
fsrp->regs[I386_REGNO_TO_SYMMETRY(op - 0x50)] = adr;
|
|
adr -= 4;
|
|
}
|
|
}
|
|
|
|
fsrp->regs[PC_REGNUM] = fip->frame + 4;
|
|
fsrp->regs[FP_REGNUM] = fip->frame;
|
|
}
|
|
|
|
static long
|
|
i386_get_frame_setup (pc)
|
|
{
|
|
unsigned char op;
|
|
|
|
codestream_seek (pc);
|
|
|
|
i386_follow_jump ();
|
|
|
|
op = codestream_get ();
|
|
|
|
if (op == 0x58) /* popl %eax */
|
|
{
|
|
/*
|
|
* 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 5 compiler puts out the second xchg
|
|
* inst, 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
|
|
*/
|
|
int pos;
|
|
unsigned char buf[4];
|
|
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 += 3;
|
|
else if (memcmp (buf, proto2, 4) == 0)
|
|
pos += 4;
|
|
|
|
codestream_seek (pos);
|
|
op = codestream_get (); /* update next opcode */
|
|
}
|
|
|
|
if (op == 0x55) /* pushl %esp */
|
|
{
|
|
if (codestream_get () != 0x8b) /* movl %esp, %ebp (2bytes) */
|
|
return (-1);
|
|
if (codestream_get () != 0xec)
|
|
return (-1);
|
|
/*
|
|
* 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
|
|
*/
|
|
op = codestream_peek ();
|
|
if (op == 0x83) /* subl with 8 bit immed */
|
|
{
|
|
codestream_get ();
|
|
if (codestream_get () != 0xec)
|
|
return (-1);
|
|
/* subl with signed byte immediate
|
|
* (though it wouldn't make sense to be negative)
|
|
*/
|
|
return (codestream_get());
|
|
}
|
|
else if (op == 0x81) /* subl with 32 bit immed */
|
|
{
|
|
int locals;
|
|
if (codestream_get () != 0xec)
|
|
return (-1);
|
|
/* subl with 32 bit immediate */
|
|
codestream_read ((unsigned char *)&locals, 4);
|
|
return (locals);
|
|
}
|
|
else
|
|
{
|
|
return (0);
|
|
}
|
|
}
|
|
else if (op == 0xc8)
|
|
{
|
|
/* enter instruction: arg is 16 unsigned immed */
|
|
unsigned short slocals;
|
|
codestream_read ((unsigned char *)&slocals, 2);
|
|
codestream_get (); /* flush final byte of enter instruction */
|
|
return (slocals);
|
|
}
|
|
return (-1);
|
|
}
|
|
|
|
/* next instruction is a jump, move to target */
|
|
static
|
|
i386_follow_jump ()
|
|
{
|
|
int long_delta;
|
|
short short_delta;
|
|
char byte_delta;
|
|
int data16;
|
|
int pos;
|
|
|
|
pos = codestream_tell ();
|
|
|
|
data16 = 0;
|
|
if (codestream_peek () == 0x66)
|
|
{
|
|
codestream_get ();
|
|
data16 = 1;
|
|
}
|
|
|
|
switch (codestream_get ())
|
|
{
|
|
case 0xe9:
|
|
/* relative jump: if data16 == 0, disp32, else disp16 */
|
|
if (data16)
|
|
{
|
|
codestream_read ((unsigned char *)&short_delta, 2);
|
|
pos += short_delta + 3; /* include size of jmp inst */
|
|
}
|
|
else
|
|
{
|
|
codestream_read ((unsigned char *)&long_delta, 4);
|
|
pos += long_delta + 5;
|
|
}
|
|
break;
|
|
case 0xeb:
|
|
/* relative jump, disp8 (ignore data16) */
|
|
codestream_read ((unsigned char *)&byte_delta, 1);
|
|
pos += byte_delta + 2;
|
|
break;
|
|
}
|
|
codestream_seek (pos + data16);
|
|
}
|
|
|
|
/* return pc of first real instruction */
|
|
/* from i386-dep.c */
|
|
|
|
i386_skip_prologue (pc)
|
|
{
|
|
unsigned char op;
|
|
int i;
|
|
|
|
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)
|
|
break;
|
|
codestream_get ();
|
|
}
|
|
|
|
i386_follow_jump ();
|
|
|
|
return (codestream_tell ());
|
|
}
|
|
|
|
void
|
|
symmetry_extract_return_value(type, regbuf, valbuf)
|
|
struct type *type;
|
|
char *regbuf;
|
|
char *valbuf;
|
|
{
|
|
union {
|
|
double d;
|
|
int l[2];
|
|
} xd;
|
|
struct minimal_symbol *msymbol;
|
|
float f;
|
|
|
|
if (TYPE_CODE_FLT == TYPE_CODE(type)) {
|
|
msymbol = lookup_minimal_symbol ("1167_flt", (struct objfile *) NULL);
|
|
if (msymbol != NULL) {
|
|
/* found "1167_flt" means 1167, %fp2-%fp3 */
|
|
/* float & double; 19= %fp2, 20= %fp3 */
|
|
/* no single precision on 1167 */
|
|
xd.l[1] = *((int *)®buf[REGISTER_BYTE(19)]);
|
|
xd.l[0] = *((int *)®buf[REGISTER_BYTE(20)]);
|
|
switch (TYPE_LENGTH(type)) {
|
|
case 4:
|
|
/* FIXME: broken for cross-debugging. */
|
|
f = (float) xd.d;
|
|
memcpy (valbuf, &f, TYPE_LENGTH(type));
|
|
break;
|
|
case 8:
|
|
/* FIXME: broken for cross-debugging. */
|
|
memcpy (valbuf, &xd.d, TYPE_LENGTH(type));
|
|
break;
|
|
default:
|
|
error("Unknown floating point size");
|
|
break;
|
|
}
|
|
} else {
|
|
/* 387 %st(0), gcc uses this */
|
|
i387_to_double(((int *)®buf[REGISTER_BYTE(3)]),
|
|
&xd.d);
|
|
switch (TYPE_LENGTH(type)) {
|
|
case 4: /* float */
|
|
f = (float) xd.d;
|
|
/* FIXME: broken for cross-debugging. */
|
|
memcpy (valbuf, &f, 4);
|
|
break;
|
|
case 8: /* double */
|
|
/* FIXME: broken for cross-debugging. */
|
|
memcpy (valbuf, &xd.d, 8);
|
|
break;
|
|
default:
|
|
error("Unknown floating point size");
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
memcpy (valbuf, regbuf, TYPE_LENGTH (type));
|
|
}
|
|
}
|
|
|
|
#ifdef _SEQUENT_ /* ptx, not dynix */
|
|
/*
|
|
* Convert compiler register number to gdb internal
|
|
* register number. The PTX C compiler only really
|
|
* puts things in %edi, %esi and %ebx, but it can't hurt
|
|
* to be complete here.
|
|
*/
|
|
int
|
|
ptx_coff_regno_to_gdb(regno)
|
|
int regno;
|
|
{
|
|
return I386_REGNO_TO_SYMMETRY(regno);
|
|
}
|
|
|
|
/* For ptx, the value in blockend will be meaningless. This function
|
|
merely returns the proper offset given the register number. This
|
|
is much easier, because under ptx, the upage is set up with the
|
|
user struct on "top", and the registers "beneath" it (and thus defines
|
|
TRAD_CORE_USER_OFFSET in bfd). */
|
|
|
|
/* The following table is for ptx 1.3. In theory it should not change with
|
|
the OS version, but if it does we should (if possible) figure out a way
|
|
to accept both the old and the new formats. */
|
|
|
|
static unsigned int reg_offsets[NUM_REGS] = {
|
|
/*
|
|
* u.u_ar0 = 0xfffff8d0
|
|
* VA_UBLOCK = 0xffffe000
|
|
* VA_UAREA = 0xfffff8e8
|
|
* struct user at ublock offset 0x18e8
|
|
* registers at ublock offset 0x18d0
|
|
*/
|
|
0x18d0, /* eax */
|
|
0x18c8, /* eax */
|
|
0x18cc, /* eax */
|
|
0x1be0, /* st0 */
|
|
0x1bea, /* st1 */
|
|
0x18c4, /* ebx */
|
|
0x18b8, /* esi */
|
|
0x18b4, /* edi */
|
|
0x1bf4, /* st2 */
|
|
0x1bfe, /* st3 */
|
|
0x1c08, /* st4 */
|
|
0x1c12, /* st5 */
|
|
0x1c1c, /* st6 */
|
|
0x1c26, /* st7 */
|
|
0x18e0, /* esp */
|
|
0x18bc, /* ebp */
|
|
0x18d4, /* eip */
|
|
0x18dc, /* flags */
|
|
0x1c38, /* fp1 */
|
|
0x1c3c, /* fp2 */
|
|
0x1c40, /* fp3 */
|
|
0x1c44, /* fp4 */
|
|
0x1c48, /* fp5 */
|
|
0x1c4c, /* fp6 */
|
|
0x1c50, /* fp7 */
|
|
0x1c54, /* fp8 */
|
|
0x1c58, /* fp9 */
|
|
0x1c5c, /* fp10 */
|
|
0x1c60, /* fp11 */
|
|
0x1c64, /* fp12 */
|
|
0x1c68, /* fp13 */
|
|
0x1c6c, /* fp14 */
|
|
0x1c70, /* fp15 */
|
|
0x1c74, /* fp16 */
|
|
0x1c78, /* fp17 */
|
|
0x1c7c, /* fp18 */
|
|
0x1c80, /* fp19 */
|
|
0x1c84, /* fp20 */
|
|
0x1c88, /* fp21 */
|
|
0x1c8c, /* fp22 */
|
|
0x1c90, /* fp23 */
|
|
0x1c94, /* fp24 */
|
|
0x1c98, /* fp25 */
|
|
0x1c9c, /* fp26 */
|
|
0x1ca0, /* fp27 */
|
|
0x1ca4, /* fp28 */
|
|
0x1ca8, /* fp29 */
|
|
0x1cac, /* fp30 */
|
|
0x1cb0, /* fp31 */
|
|
};
|
|
|
|
unsigned int
|
|
register_addr (regno, blockend)
|
|
int regno, blockend;
|
|
{
|
|
if ((regno < 0) || (regno >= NUM_REGS)) {
|
|
error("Invalid register number %d.", regno);
|
|
}
|
|
return reg_offsets[regno];
|
|
}
|
|
#endif /* _SEQUENT_ */
|