binutils-gdb/gdb/symm-xdep.c

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1991-04-05 11:01:15 +02:00
/* 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 *)&registers[REGISTER_BYTE(0)];
regs.pr_ebx = *(int *)&registers[REGISTER_BYTE(5)];
regs.pr_ecx = *(int *)&registers[REGISTER_BYTE(2)];
regs.pr_edx = *(int *)&registers[REGISTER_BYTE(1)];
regs.pr_esi = *(int *)&registers[REGISTER_BYTE(6)];
regs.pr_edi = *(int *)&registers[REGISTER_BYTE(7)];
regs.pr_esp = *(int *)&registers[REGISTER_BYTE(14)];
regs.pr_ebp = *(int *)&registers[REGISTER_BYTE(15)];
regs.pr_eip = *(int *)&registers[REGISTER_BYTE(16)];
regs.pr_flags = *(int *)&registers[REGISTER_BYTE(17)];
for (i = 0; i < 31; i++) {
regs.pr_fpa.fpa_regs[i] =
*(int *)&registers[REGISTER_BYTE(FP1_REGNUM+i)];
}
#if 0
}
else
{
reg_tmp = *(int *)&registers[REGISTER_BYTE(regno)];
ptrace(XPT_RREGS, inferior_pid, &regs, 0);
switch (regno)
{
case 0:
regs.pr_eax = *(int *)&registers[REGISTER_BYTE(0)];
break;
case 5:
regs.pr_ebx = *(int *)&registers[REGISTER_BYTE(5)];
break;
case 2:
regs.pr_ecx = *(int *)&registers[REGISTER_BYTE(2)];
break;
case 1:
regs.pr_edx = *(int *)&registers[REGISTER_BYTE(1)];
break;
case 6:
regs.pr_esi = *(int *)&registers[REGISTER_BYTE(6)];
break;
case 7:
regs.pr_edi = *(int *)&registers[REGISTER_BYTE(7)];
break;
case 15:
regs.pr_ebp = *(int *)&registers[REGISTER_BYTE(15)];
break;
case 14:
regs.pr_esp = *(int *)&registers[REGISTER_BYTE(14)];
break;
case 16:
regs.pr_eip = *(int *)&registers[REGISTER_BYTE(16)];
break;
case 17:
regs.pr_flags = *(int *)&registers[REGISTER_BYTE(17)];
break;
}
}
#endif /* 0 */
ptrace(XPT_WREGS, inferior_pid, &regs, 0);
}
void
fetch_inferior_registers()
{
int i;
struct pt_regset regs;
extern char registers[];
registers_fetched ();
ptrace(XPT_RREGS, inferior_pid, &regs, 0);
*(int *)&registers[REGISTER_BYTE(0)] = regs.pr_eax;
*(int *)&registers[REGISTER_BYTE(5)] = regs.pr_ebx;
*(int *)&registers[REGISTER_BYTE(2)] = regs.pr_ecx;
*(int *)&registers[REGISTER_BYTE(1)] = regs.pr_edx;
*(int *)&registers[REGISTER_BYTE(6)] = regs.pr_esi;
*(int *)&registers[REGISTER_BYTE(7)] = regs.pr_edi;
*(int *)&registers[REGISTER_BYTE(15)] = regs.pr_ebp;
*(int *)&registers[REGISTER_BYTE(14)] = regs.pr_esp;
*(int *)&registers[REGISTER_BYTE(16)] = regs.pr_eip;
*(int *)&registers[REGISTER_BYTE(17)] = regs.pr_flags;
for (i = 0; i < FPA_NREGS; i++) {
*(int *)&registers[REGISTER_BYTE(FP1_REGNUM+i)] = regs.pr_fpa.fpa_regs[i];
}
bcopy(regs.pr_fpu.fpu_stack[0], &registers[REGISTER_BYTE(3)], 10);
bcopy(regs.pr_fpu.fpu_stack[1], &registers[REGISTER_BYTE(4)], 10);
bcopy(regs.pr_fpu.fpu_stack[2], &registers[REGISTER_BYTE(8)], 10);
bcopy(regs.pr_fpu.fpu_stack[3], &registers[REGISTER_BYTE(9)], 10);
bcopy(regs.pr_fpu.fpu_stack[4], &registers[REGISTER_BYTE(10)], 10);
bcopy(regs.pr_fpu.fpu_stack[5], &registers[REGISTER_BYTE(11)], 10);
bcopy(regs.pr_fpu.fpu_stack[6], &registers[REGISTER_BYTE(12)], 10);
bcopy(regs.pr_fpu.fpu_stack[7], &registers[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, &regset, 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");
}