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-rw-r--r--gnu/usr.bin/binutils/gdb/i386b-nat.c284
1 files changed, 284 insertions, 0 deletions
diff --git a/gnu/usr.bin/binutils/gdb/i386b-nat.c b/gnu/usr.bin/binutils/gdb/i386b-nat.c
new file mode 100644
index 00000000000..938b599caba
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+++ b/gnu/usr.bin/binutils/gdb/i386b-nat.c
@@ -0,0 +1,284 @@
+/* Native-dependent code for BSD Unix running on i386's, for GDB.
+ Copyright 1988, 1989, 1991, 1992, 1994, 1996 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#include "defs.h"
+
+#ifdef FETCH_INFERIOR_REGISTERS
+#include <sys/types.h>
+#include <sys/ptrace.h>
+#include <machine/reg.h>
+#include <machine/frame.h>
+#include "inferior.h"
+
+void
+fetch_inferior_registers(regno)
+ int regno;
+{
+ struct reg inferior_registers;
+
+ ptrace (PT_GETREGS, inferior_pid, (PTRACE_ARG3_TYPE) &inferior_registers, 0);
+ memcpy (&registers[REGISTER_BYTE (0)], &inferior_registers, 4*NUM_REGS);
+ registers_fetched ();
+}
+
+void
+store_inferior_registers(regno)
+ int regno;
+{
+ struct reg inferior_registers;
+
+ memcpy (&inferior_registers, &registers[REGISTER_BYTE (0)], 4*NUM_REGS);
+ ptrace (PT_SETREGS, inferior_pid, (PTRACE_ARG3_TYPE) &inferior_registers, 0);
+}
+
+struct md_core {
+ struct reg intreg;
+ struct fpreg freg;
+};
+
+void
+fetch_core_registers (core_reg_sect, core_reg_size, which, ignore)
+ char *core_reg_sect;
+ unsigned core_reg_size;
+ int which;
+ CORE_ADDR ignore;
+{
+ struct md_core *core_reg = (struct md_core *)core_reg_sect;
+
+ /* integer registers */
+ memcpy(&registers[REGISTER_BYTE (0)], &core_reg->intreg,
+ sizeof(struct reg));
+ /* floating point registers */
+ /* XXX */
+}
+
+#else
+
+#include <machine/reg.h>
+
+/* this table must line up with REGISTER_NAMES in tm-i386.h */
+/* symbols like 'tEAX' come from <machine/reg.h> */
+static int tregmap[] =
+{
+ tEAX, tECX, tEDX, tEBX,
+ tESP, tEBP, tESI, tEDI,
+ tEIP, tEFLAGS, tCS, tSS
+};
+
+#ifdef sEAX
+static int sregmap[] =
+{
+ sEAX, sECX, sEDX, sEBX,
+ sESP, sEBP, sESI, sEDI,
+ sEIP, sEFLAGS, sCS, sSS
+};
+#else /* No sEAX */
+
+/* FreeBSD has decided to collapse the s* and t* symbols. So if the s*
+ ones aren't around, use the t* ones for sregmap too. */
+
+static int sregmap[] =
+{
+ tEAX, tECX, tEDX, tEBX,
+ tESP, tEBP, tESI, tEDI,
+ tEIP, tEFLAGS, tCS, tSS
+};
+#endif /* No sEAX */
+
+/* blockend is the value of u.u_ar0, and points to the
+ place where ES is stored. */
+
+int
+i386_register_u_addr (blockend, regnum)
+ int blockend;
+ int regnum;
+{
+ /* The following condition is a kludge to get at the proper register map
+ depending upon the state of pcb_flag.
+ The proper condition would be
+ if (u.u_pcb.pcb_flag & FM_TRAP)
+ but that would require a ptrace call here and wouldn't work
+ for corefiles. */
+
+ if (blockend < 0x1fcc)
+ return (blockend + 4 * tregmap[regnum]);
+ else
+ return (blockend + 4 * sregmap[regnum]);
+}
+
+#endif /* !FETCH_INFERIOR_REGISTERS */
+
+#ifdef FLOAT_INFO
+#include "language.h" /* for local_hex_string */
+#include "floatformat.h"
+
+#include <sys/param.h>
+#include <sys/dir.h>
+#include <signal.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+
+#include <a.out.h>
+
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/uio.h>
+#define curpcb Xcurpcb /* XXX avoid leaking declaration from pcb.h */
+#include <sys/user.h>
+#undef curpcb
+#include <sys/file.h>
+#include "gdb_stat.h"
+#include <sys/ptrace.h>
+
+extern void print_387_control_word (); /* i387-tdep.h */
+extern void print_387_status_word ();
+
+#define fpstate save87
+#define U_FPSTATE(u) u.u_pcb.pcb_savefpu
+
+struct env387
+{
+ unsigned short control;
+ unsigned short r0;
+ unsigned short status;
+ unsigned short r1;
+ unsigned short tag;
+ unsigned short r2;
+ unsigned long eip;
+ unsigned short code_seg;
+ unsigned short opcode;
+ unsigned long operand;
+ unsigned short operand_seg;
+ unsigned short r3;
+ unsigned char regs[8][10];
+};
+
+static void
+print_387_status (status, ep)
+ unsigned short status;
+ struct env387 *ep;
+{
+ int i;
+ int bothstatus;
+ int top;
+ int fpreg;
+
+ bothstatus = ((status != 0) && (ep->status != 0));
+ if (status != 0)
+ {
+ if (bothstatus)
+ printf_unfiltered ("u: ");
+ print_387_status_word ((unsigned int)status);
+ }
+
+ if (ep->status != 0)
+ {
+ if (bothstatus)
+ printf_unfiltered ("e: ");
+ print_387_status_word ((unsigned int)ep->status);
+ }
+
+ print_387_control_word ((unsigned int)ep->control);
+ printf_unfiltered ("last exception: ");
+ printf_unfiltered ("opcode %s; ", local_hex_string(ep->opcode));
+ printf_unfiltered ("pc %s:", local_hex_string(ep->code_seg));
+ printf_unfiltered ("%s; ", local_hex_string(ep->eip));
+ printf_unfiltered ("operand %s", local_hex_string(ep->operand_seg));
+ printf_unfiltered (":%s\n", local_hex_string(ep->operand));
+
+ top = (ep->status >> 11) & 7;
+
+ printf_unfiltered ("regno tag msb lsb value\n");
+ for (fpreg = 7; fpreg >= 0; fpreg--)
+ {
+ double val;
+
+ printf_unfiltered ("%s %d: ", fpreg == top ? "=>" : " ", fpreg);
+
+ switch ((ep->tag >> (fpreg * 2)) & 3)
+ {
+ case 0: printf_unfiltered ("valid "); break;
+ case 1: printf_unfiltered ("zero "); break;
+ case 2: printf_unfiltered ("trap "); break;
+ case 3: printf_unfiltered ("empty "); break;
+ }
+ for (i = 9; i >= 0; i--)
+ printf_unfiltered ("%02x", ep->regs[fpreg][i]);
+
+ floatformat_to_double(&floatformat_i387_ext, (char *) ep->regs[fpreg],
+ &val);
+ printf_unfiltered (" %g\n", val);
+ }
+}
+
+i386_float_info ()
+{
+ struct user u; /* just for address computations */
+ int i;
+ /* fpstate defined in <sys/user.h> */
+ struct fpstate *fpstatep;
+ char buf[sizeof (struct fpstate) + 2 * sizeof (int)];
+ unsigned int uaddr;
+ char fpvalid;
+ unsigned int rounded_addr;
+ unsigned int rounded_size;
+ /*extern int corechan;*/
+ int skip;
+ extern int inferior_pid;
+
+ uaddr = (char *)&U_FPSTATE(u) - (char *)&u;
+ if (inferior_pid)
+ {
+ int *ip;
+
+ rounded_addr = uaddr & -sizeof (int);
+ rounded_size = (((uaddr + sizeof (struct fpstate)) - uaddr) +
+ sizeof (int) - 1) / sizeof (int);
+ skip = uaddr - rounded_addr;
+
+ ip = (int *)buf;
+ for (i = 0; i < rounded_size; i++)
+ {
+ *ip++ = ptrace (PT_READ_U, inferior_pid, (caddr_t)rounded_addr, 0);
+ rounded_addr += sizeof (int);
+ }
+ }
+ else
+ {
+ printf("float info: can't do a core file (yet)\n");
+ return;
+#if 0
+ if (lseek (corechan, uaddr, 0) < 0)
+ perror_with_name ("seek on core file");
+ if (myread (corechan, buf, sizeof (struct fpstate)) < 0)
+ perror_with_name ("read from core file");
+ skip = 0;
+#endif
+ }
+
+ print_387_status (0, (struct env387 *)buf);
+}
+
+int
+kernel_u_size ()
+{
+ return (sizeof (struct user));
+}
+
+#endif
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