mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-27 03:51:15 +08:00
558 lines
15 KiB
C
558 lines
15 KiB
C
/* Sequent Symmetry host interface, for GDB when running under Unix.
|
||
Copyright (C) 1986, 1987, 1989, 1991 Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
GDB 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 1, or (at your option)
|
||
any later version.
|
||
|
||
GDB 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 GDB; see the file COPYING. If not, write to
|
||
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
|
||
|
||
/* many 387-specific items of use taken from i386-dep.c */
|
||
|
||
#include <stdio.h>
|
||
#include "defs.h"
|
||
#include "param.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
|
||
|
||
store_inferior_registers(regno)
|
||
int regno;
|
||
{
|
||
struct pt_regset regs;
|
||
int reg_tmp, i;
|
||
extern char registers[];
|
||
|
||
#if 0
|
||
/* PREPARE_TO_STORE deals with this. */
|
||
if (-1 == regno)
|
||
{
|
||
#endif
|
||
regs.pr_eax = *(int *)®isters[REGISTER_BYTE(0)];
|
||
regs.pr_ebx = *(int *)®isters[REGISTER_BYTE(5)];
|
||
regs.pr_ecx = *(int *)®isters[REGISTER_BYTE(2)];
|
||
regs.pr_edx = *(int *)®isters[REGISTER_BYTE(1)];
|
||
regs.pr_esi = *(int *)®isters[REGISTER_BYTE(6)];
|
||
regs.pr_edi = *(int *)®isters[REGISTER_BYTE(7)];
|
||
regs.pr_esp = *(int *)®isters[REGISTER_BYTE(14)];
|
||
regs.pr_ebp = *(int *)®isters[REGISTER_BYTE(15)];
|
||
regs.pr_eip = *(int *)®isters[REGISTER_BYTE(16)];
|
||
regs.pr_flags = *(int *)®isters[REGISTER_BYTE(17)];
|
||
for (i = 0; i < 31; i++) {
|
||
regs.pr_fpa.fpa_regs[i] =
|
||
*(int *)®isters[REGISTER_BYTE(FP1_REGNUM+i)];
|
||
}
|
||
#if 0
|
||
}
|
||
else
|
||
{
|
||
reg_tmp = *(int *)®isters[REGISTER_BYTE(regno)];
|
||
ptrace(XPT_RREGS, inferior_pid, ®s, 0);
|
||
switch (regno)
|
||
{
|
||
case 0:
|
||
regs.pr_eax = *(int *)®isters[REGISTER_BYTE(0)];
|
||
break;
|
||
case 5:
|
||
regs.pr_ebx = *(int *)®isters[REGISTER_BYTE(5)];
|
||
break;
|
||
case 2:
|
||
regs.pr_ecx = *(int *)®isters[REGISTER_BYTE(2)];
|
||
break;
|
||
case 1:
|
||
regs.pr_edx = *(int *)®isters[REGISTER_BYTE(1)];
|
||
break;
|
||
case 6:
|
||
regs.pr_esi = *(int *)®isters[REGISTER_BYTE(6)];
|
||
break;
|
||
case 7:
|
||
regs.pr_edi = *(int *)®isters[REGISTER_BYTE(7)];
|
||
break;
|
||
case 15:
|
||
regs.pr_ebp = *(int *)®isters[REGISTER_BYTE(15)];
|
||
break;
|
||
case 14:
|
||
regs.pr_esp = *(int *)®isters[REGISTER_BYTE(14)];
|
||
break;
|
||
case 16:
|
||
regs.pr_eip = *(int *)®isters[REGISTER_BYTE(16)];
|
||
break;
|
||
case 17:
|
||
regs.pr_flags = *(int *)®isters[REGISTER_BYTE(17)];
|
||
break;
|
||
}
|
||
}
|
||
#endif /* 0 */
|
||
ptrace(XPT_WREGS, inferior_pid, ®s, 0);
|
||
}
|
||
|
||
void
|
||
fetch_inferior_registers()
|
||
{
|
||
int i;
|
||
struct pt_regset regs;
|
||
extern char registers[];
|
||
|
||
registers_fetched ();
|
||
|
||
ptrace(XPT_RREGS, inferior_pid, ®s, 0);
|
||
*(int *)®isters[REGISTER_BYTE(0)] = regs.pr_eax;
|
||
*(int *)®isters[REGISTER_BYTE(5)] = regs.pr_ebx;
|
||
*(int *)®isters[REGISTER_BYTE(2)] = regs.pr_ecx;
|
||
*(int *)®isters[REGISTER_BYTE(1)] = regs.pr_edx;
|
||
*(int *)®isters[REGISTER_BYTE(6)] = regs.pr_esi;
|
||
*(int *)®isters[REGISTER_BYTE(7)] = regs.pr_edi;
|
||
*(int *)®isters[REGISTER_BYTE(15)] = regs.pr_ebp;
|
||
*(int *)®isters[REGISTER_BYTE(14)] = regs.pr_esp;
|
||
*(int *)®isters[REGISTER_BYTE(16)] = regs.pr_eip;
|
||
*(int *)®isters[REGISTER_BYTE(17)] = regs.pr_flags;
|
||
for (i = 0; i < FPA_NREGS; i++) {
|
||
*(int *)®isters[REGISTER_BYTE(FP1_REGNUM+i)] = regs.pr_fpa.fpa_regs[i];
|
||
}
|
||
bcopy(regs.pr_fpu.fpu_stack[0], ®isters[REGISTER_BYTE(3)], 10);
|
||
bcopy(regs.pr_fpu.fpu_stack[1], ®isters[REGISTER_BYTE(4)], 10);
|
||
bcopy(regs.pr_fpu.fpu_stack[2], ®isters[REGISTER_BYTE(8)], 10);
|
||
bcopy(regs.pr_fpu.fpu_stack[3], ®isters[REGISTER_BYTE(9)], 10);
|
||
bcopy(regs.pr_fpu.fpu_stack[4], ®isters[REGISTER_BYTE(10)], 10);
|
||
bcopy(regs.pr_fpu.fpu_stack[5], ®isters[REGISTER_BYTE(11)], 10);
|
||
bcopy(regs.pr_fpu.fpu_stack[6], ®isters[REGISTER_BYTE(12)], 10);
|
||
bcopy(regs.pr_fpu.fpu_stack[7], ®isters[REGISTER_BYTE(13)], 10);
|
||
}
|
||
|
||
|
||
/* Work with core dump and executable files, for GDB.
|
||
This code would be in core.c if it weren't machine-dependent. */
|
||
|
||
#include "gdbcore.h"
|
||
|
||
void
|
||
core_file_command (filename, from_tty)
|
||
char *filename;
|
||
int from_tty;
|
||
{
|
||
int val;
|
||
extern char registers[];
|
||
|
||
/* Discard all vestiges of any previous core file
|
||
and mark data and stack spaces as empty. */
|
||
|
||
if (corefile)
|
||
free (corefile);
|
||
corefile = 0;
|
||
|
||
if (corechan >= 0)
|
||
close (corechan);
|
||
corechan = -1;
|
||
|
||
data_start = 0;
|
||
data_end = 0;
|
||
stack_start = STACK_END_ADDR;
|
||
stack_end = STACK_END_ADDR;
|
||
|
||
/* Now, if a new core file was specified, open it and digest it. */
|
||
|
||
if (filename)
|
||
{
|
||
filename = tilde_expand (filename);
|
||
make_cleanup (free, filename);
|
||
|
||
if (have_inferior_p ())
|
||
error ("To look at a core file, you must kill the inferior with \"kill\".");
|
||
corechan = open (filename, O_RDONLY, 0);
|
||
if (corechan < 0)
|
||
perror_with_name (filename);
|
||
/* 4.2-style (and perhaps also sysV-style) core dump file. */
|
||
{
|
||
struct user u;
|
||
int reg_offset;
|
||
|
||
val = myread (corechan, &u, sizeof u);
|
||
if (val < 0)
|
||
perror_with_name (filename);
|
||
data_start = exec_data_start;
|
||
|
||
data_end = data_start + NBPG * (u.u_dsize - u.u_tsize);
|
||
stack_start = stack_end - NBPG * u.u_ssize;
|
||
data_offset = NBPG * UPAGES;
|
||
stack_offset = ctob(UPAGES + u.u_dsize - u.u_tsize);
|
||
reg_offset = (int) u.u_ar0 - KERNEL_U_ADDR;
|
||
printf("u.u_tsize= %#x, u.u_dsize= %#x, u.u_ssize= %#x, stack_off= %#x\n",
|
||
u.u_tsize, u.u_dsize, u.u_ssize, stack_offset);
|
||
|
||
core_aouthdr.a_magic = 0;
|
||
|
||
/* Read the register values out of the core file and store
|
||
them where `read_register' will find them. */
|
||
|
||
{
|
||
register int regno;
|
||
|
||
for (regno = 0; regno < NUM_REGS; regno++)
|
||
{
|
||
char buf[MAX_REGISTER_RAW_SIZE];
|
||
|
||
val = lseek (corechan, register_addr (regno, reg_offset), 0);
|
||
if (val < 0)
|
||
perror_with_name (filename);
|
||
|
||
val = myread (corechan, buf, sizeof buf);
|
||
if (val < 0)
|
||
perror_with_name (filename);
|
||
supply_register (regno, buf);
|
||
}
|
||
}
|
||
}
|
||
if (filename[0] == '/')
|
||
corefile = savestring (filename, strlen (filename));
|
||
else
|
||
{
|
||
corefile = concat (current_directory, "/", filename);
|
||
}
|
||
|
||
set_current_frame(create_new_frame(read_register(FP_REGNUM),
|
||
read_pc()));
|
||
/* set_current_frame (read_register (FP_REGNUM));*/
|
||
select_frame (get_current_frame (), 0);
|
||
validate_files ();
|
||
}
|
||
else if (from_tty)
|
||
printf ("No core file now.\n");
|
||
}
|
||
|
||
/* from i386-dep.c */
|
||
static
|
||
print_387_control_word (control)
|
||
unsigned short control;
|
||
{
|
||
printf ("control 0x%04x: ", control);
|
||
printf ("compute to ");
|
||
switch ((control >> 8) & 3)
|
||
{
|
||
case 0: printf ("24 bits; "); break;
|
||
case 1: printf ("(bad); "); break;
|
||
case 2: printf ("53 bits; "); break;
|
||
case 3: printf ("64 bits; "); break;
|
||
}
|
||
printf ("round ");
|
||
switch ((control >> 10) & 3)
|
||
{
|
||
case 0: printf ("NEAREST; "); break;
|
||
case 1: printf ("DOWN; "); break;
|
||
case 2: printf ("UP; "); break;
|
||
case 3: printf ("CHOP; "); break;
|
||
}
|
||
if (control & 0x3f)
|
||
{
|
||
printf ("mask:");
|
||
if (control & 0x0001) printf (" INVALID");
|
||
if (control & 0x0002) printf (" DENORM");
|
||
if (control & 0x0004) printf (" DIVZ");
|
||
if (control & 0x0008) printf (" OVERF");
|
||
if (control & 0x0010) printf (" UNDERF");
|
||
if (control & 0x0020) printf (" LOS");
|
||
printf (";");
|
||
}
|
||
printf ("\n");
|
||
if (control & 0xe080) printf ("warning: reserved bits on 0x%x\n",
|
||
control & 0xe080);
|
||
}
|
||
|
||
static
|
||
print_387_status_word (status)
|
||
unsigned short status;
|
||
{
|
||
printf ("status %#04x: ", status);
|
||
if (status & 0xff) {
|
||
printf ("exceptions:"); /* exception names match <machine/fpu.h> */
|
||
if (status & 0x0001) printf (" FLTINV");
|
||
if (status & 0x0002) printf (" FLTDEN");
|
||
if (status & 0x0004) printf (" FLTDIV");
|
||
if (status & 0x0008) printf (" FLTOVF");
|
||
if (status & 0x0010) printf (" FLTUND");
|
||
if (status & 0x0020) printf (" FLTPRE");
|
||
if (status & 0x0040) printf (" FLTSTK");
|
||
printf ("; ");
|
||
}
|
||
printf ("flags: %d%d%d%d; ",
|
||
(status & 0x4000) != 0,
|
||
(status & 0x0400) != 0,
|
||
(status & 0x0200) != 0,
|
||
(status & 0x0100) != 0);
|
||
|
||
printf ("top %d\n", (status >> 11) & 7);
|
||
}
|
||
|
||
static
|
||
print_fpu_status(ep)
|
||
struct pt_regset ep;
|
||
|
||
{
|
||
int i;
|
||
int bothstatus;
|
||
int top;
|
||
int fpreg;
|
||
unsigned char *p;
|
||
|
||
printf("80387:");
|
||
if (ep.pr_fpu.fpu_ip == 0) {
|
||
printf(" not in use.\n");
|
||
return;
|
||
} else {
|
||
printf("\n");
|
||
}
|
||
if (ep.pr_fpu.fpu_status != 0) {
|
||
print_387_status_word (ep.pr_fpu.fpu_status);
|
||
}
|
||
print_387_control_word (ep.pr_fpu.fpu_control);
|
||
printf ("last exception: ");
|
||
printf ("opcode 0x%x; ", ep.pr_fpu.fpu_rsvd4);
|
||
printf ("pc 0x%x:0x%x; ", ep.pr_fpu.fpu_cs, ep.pr_fpu.fpu_ip);
|
||
printf ("operand 0x%x:0x%x\n", ep.pr_fpu.fpu_data_offset, ep.pr_fpu.fpu_op_sel);
|
||
|
||
top = (ep.pr_fpu.fpu_status >> 11) & 7;
|
||
|
||
printf ("regno tag msb lsb value\n");
|
||
for (fpreg = 7; fpreg >= 0; fpreg--)
|
||
{
|
||
double val;
|
||
|
||
printf ("%s %d: ", fpreg == top ? "=>" : " ", fpreg);
|
||
|
||
switch ((ep.pr_fpu.fpu_tag >> (fpreg * 2)) & 3)
|
||
{
|
||
case 0: printf ("valid "); break;
|
||
case 1: printf ("zero "); break;
|
||
case 2: printf ("trap "); break;
|
||
case 3: printf ("empty "); break;
|
||
}
|
||
for (i = 9; i >= 0; i--)
|
||
printf ("%02x", ep.pr_fpu.fpu_stack[fpreg][i]);
|
||
|
||
i387_to_double (ep.pr_fpu.fpu_stack[fpreg], (char *)&val);
|
||
printf (" %g\n", val);
|
||
}
|
||
if (ep.pr_fpu.fpu_rsvd1)
|
||
printf ("warning: rsvd1 is 0x%x\n", ep.pr_fpu.fpu_rsvd1);
|
||
if (ep.pr_fpu.fpu_rsvd2)
|
||
printf ("warning: rsvd2 is 0x%x\n", ep.pr_fpu.fpu_rsvd2);
|
||
if (ep.pr_fpu.fpu_rsvd3)
|
||
printf ("warning: rsvd3 is 0x%x\n", ep.pr_fpu.fpu_rsvd3);
|
||
if (ep.pr_fpu.fpu_rsvd5)
|
||
printf ("warning: rsvd5 is 0x%x\n", ep.pr_fpu.fpu_rsvd5);
|
||
}
|
||
|
||
|
||
print_1167_control_word(pcr)
|
||
unsigned int pcr;
|
||
|
||
{
|
||
int pcr_tmp;
|
||
|
||
pcr_tmp = pcr & FPA_PCR_MODE;
|
||
printf("\tMODE= %#x; RND= %#x ", pcr_tmp, pcr_tmp & 12);
|
||
switch (pcr_tmp & 12) {
|
||
case 0:
|
||
printf("RN (Nearest Value)");
|
||
break;
|
||
case 1:
|
||
printf("RZ (Zero)");
|
||
break;
|
||
case 2:
|
||
printf("RP (Positive Infinity)");
|
||
break;
|
||
case 3:
|
||
printf("RM (Negative Infinity)");
|
||
break;
|
||
}
|
||
printf("; IRND= %d ", pcr_tmp & 2);
|
||
if (0 == pcr_tmp & 2) {
|
||
printf("(same as RND)\n");
|
||
} else {
|
||
printf("(toward zero)\n");
|
||
}
|
||
pcr_tmp = pcr & FPA_PCR_EM;
|
||
printf("\tEM= %#x", pcr_tmp);
|
||
if (pcr_tmp & FPA_PCR_EM_DM) printf(" DM");
|
||
if (pcr_tmp & FPA_PCR_EM_UOM) printf(" UOM");
|
||
if (pcr_tmp & FPA_PCR_EM_PM) printf(" PM");
|
||
if (pcr_tmp & FPA_PCR_EM_UM) printf(" UM");
|
||
if (pcr_tmp & FPA_PCR_EM_OM) printf(" OM");
|
||
if (pcr_tmp & FPA_PCR_EM_ZM) printf(" ZM");
|
||
if (pcr_tmp & FPA_PCR_EM_IM) printf(" IM");
|
||
printf("\n");
|
||
pcr_tmp = FPA_PCR_CC;
|
||
printf("\tCC= %#x", pcr_tmp);
|
||
if (pcr_tmp & FPA_PCR_20MHZ) printf(" 20MHZ");
|
||
if (pcr_tmp & FPA_PCR_CC_Z) printf(" Z");
|
||
if (pcr_tmp & FPA_PCR_CC_C2) printf(" C2");
|
||
if (pcr_tmp & FPA_PCR_CC_C1) printf(" C1");
|
||
switch (pcr_tmp) {
|
||
case FPA_PCR_CC_Z:
|
||
printf(" (Equal)");
|
||
break;
|
||
case FPA_PCR_CC_C1:
|
||
printf(" (Less than)");
|
||
break;
|
||
case 0:
|
||
printf(" (Greater than)");
|
||
break;
|
||
case FPA_PCR_CC_Z | FPA_PCR_CC_C1 | FPA_PCR_CC_C2:
|
||
printf(" (Unordered)");
|
||
break;
|
||
default:
|
||
printf(" (Undefined)");
|
||
break;
|
||
}
|
||
printf("\n");
|
||
pcr_tmp = pcr & FPA_PCR_AE;
|
||
printf("\tAE= %#x", pcr_tmp);
|
||
if (pcr_tmp & FPA_PCR_AE_DE) printf(" DE");
|
||
if (pcr_tmp & FPA_PCR_AE_UOE) printf(" UOE");
|
||
if (pcr_tmp & FPA_PCR_AE_PE) printf(" PE");
|
||
if (pcr_tmp & FPA_PCR_AE_UE) printf(" UE");
|
||
if (pcr_tmp & FPA_PCR_AE_OE) printf(" OE");
|
||
if (pcr_tmp & FPA_PCR_AE_ZE) printf(" ZE");
|
||
if (pcr_tmp & FPA_PCR_AE_EE) printf(" EE");
|
||
if (pcr_tmp & FPA_PCR_AE_IE) printf(" IE");
|
||
printf("\n");
|
||
}
|
||
|
||
print_1167_regs(regs)
|
||
long regs[FPA_NREGS];
|
||
|
||
{
|
||
int i;
|
||
|
||
union {
|
||
double d;
|
||
long l[2];
|
||
} xd;
|
||
union {
|
||
float f;
|
||
long l;
|
||
} xf;
|
||
|
||
|
||
for (i = 0; i < FPA_NREGS; i++) {
|
||
xf.l = regs[i];
|
||
printf("%%fp%d: raw= %#x, single= %f", i+1, regs[i], xf.f);
|
||
if (!(i & 1)) {
|
||
printf("\n");
|
||
} else {
|
||
xd.l[1] = regs[i];
|
||
xd.l[0] = regs[i+1];
|
||
printf(", double= %f\n", xd.d);
|
||
}
|
||
}
|
||
}
|
||
|
||
print_fpa_status(ep)
|
||
struct pt_regset ep;
|
||
|
||
{
|
||
|
||
printf("WTL 1167:");
|
||
if (ep.pr_fpa.fpa_pcr !=0) {
|
||
printf("\n");
|
||
print_1167_control_word(ep.pr_fpa.fpa_pcr);
|
||
print_1167_regs(ep.pr_fpa.fpa_regs);
|
||
} else {
|
||
printf(" not in use.\n");
|
||
}
|
||
}
|
||
|
||
i386_float_info ()
|
||
|
||
{
|
||
char ubuf[UPAGES*NBPG];
|
||
struct pt_regset regset;
|
||
extern int corechan;
|
||
|
||
if (have_inferior_p()) {
|
||
call_ptrace(XPT_RREGS, inferior_pid, ®set, 0);
|
||
} else {
|
||
if (lseek (corechan, 0, 0) < 0) {
|
||
perror ("seek on core file");
|
||
}
|
||
if (myread (corechan, ubuf, UPAGES*NBPG) < 0) {
|
||
perror ("read on core file");
|
||
}
|
||
/* only interested in the floating point registers */
|
||
regset.pr_fpu = ((struct user *) ubuf)->u_fpusave;
|
||
regset.pr_fpa = ((struct user *) ubuf)->u_fpasave;
|
||
}
|
||
print_fpu_status(regset);
|
||
print_fpa_status(regset);
|
||
}
|
||
|
||
i387_to_double (from, to)
|
||
char *from;
|
||
char *to;
|
||
{
|
||
long *lp;
|
||
/* push extended mode on 387 stack, then pop in double mode
|
||
*
|
||
* first, set exception masks so no error is generated -
|
||
* number will be rounded to inf or 0, if necessary
|
||
*/
|
||
asm ("pushl %eax"); /* grab a stack slot */
|
||
asm ("fstcw (%esp)"); /* get 387 control word */
|
||
asm ("movl (%esp),%eax"); /* save old value */
|
||
asm ("orl $0x3f,%eax"); /* mask all exceptions */
|
||
asm ("pushl %eax");
|
||
asm ("fldcw (%esp)"); /* load new value into 387 */
|
||
|
||
asm ("movl 8(%ebp),%eax");
|
||
asm ("fldt (%eax)"); /* push extended number on 387 stack */
|
||
asm ("fwait");
|
||
asm ("movl 12(%ebp),%eax");
|
||
asm ("fstpl (%eax)"); /* pop double */
|
||
asm ("fwait");
|
||
|
||
asm ("popl %eax"); /* flush modified control word */
|
||
asm ("fnclex"); /* clear exceptions */
|
||
asm ("fldcw (%esp)"); /* restore original control word */
|
||
asm ("popl %eax"); /* flush saved copy */
|
||
}
|
||
|
||
double_to_i387 (from, to)
|
||
char *from;
|
||
char *to;
|
||
{
|
||
/* push double mode on 387 stack, then pop in extended mode
|
||
* no errors are possible because every 64-bit pattern
|
||
* can be converted to an extended
|
||
*/
|
||
asm ("movl 8(%ebp),%eax");
|
||
asm ("fldl (%eax)");
|
||
asm ("fwait");
|
||
asm ("movl 12(%ebp),%eax");
|
||
asm ("fstpt (%eax)");
|
||
asm ("fwait");
|
||
}
|