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/* Native-dependent code for Interix running on i386's, for GDB.
Copyright 2002 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"
#include <sys/procfs.h>
#include <inferior.h>
#include <fcntl.h>
#include <i386-tdep.h>
#include "gdb_string.h"
#include "gdbcore.h"
#include "gregset.h"
#include "regcache.h"
typedef unsigned long greg_t;
/* This is a duplicate of the table in i386-linux-nat.c. */
static int regmap[] = {
EAX, ECX, EDX, EBX,
UESP, EBP, ESI, EDI,
EIP, EFL, CS, SS,
DS, ES, FS, GS,
};
/* Forward declarations. */
extern void _initialize_core_interix (void);
extern initialize_file_ftype _initialize_core_interix;
/* Given a pointer to a general register set in /proc format (gregset_t *),
unpack the register contents and supply them as gdb's idea of the current
register values. */
void
supply_gregset (gregset_t *gregsetp)
{
int regi;
greg_t *regp = (greg_t *) & gregsetp->gregs;
for (regi = 0; regi < I386_NUM_GREGS; regi++)
{
supply_register (regi, (char *) (regp + regmap[regi]));
}
}
/* Store GDB's value for REGNO in *GREGSETP. If REGNO is -1, do all
of them. */
void
fill_gregset (gregset_t *gregsetp, int regno)
{
int regi;
greg_t *regp = (greg_t *) gregsetp->gregs;
for (regi = 0; regi < I386_NUM_GREGS; regi++)
if (regno == -1 || regi == regno)
regcache_collect (regi, (void *) (regp + regmap[regi]));
}
/* Fill GDB's register file with the floating-point register values in
*FPREGSETP. */
void
supply_fpregset (fpregset_t *fpregsetp)
{
i387_supply_fsave ((const char *) fpregsetp, -1);
}
/* Given a pointer to a floating point register set in (fpregset_t *)
format, update all of the registers from gdb's idea of the current
floating point register set. */
void
fill_fpregset (fpregset_t *fpregsetp, int regno)
{
i387_fill_fsave ((char *) fpregsetp, regno);
}
/* Read the values of either the general register set (WHICH equals 0)
or the floating point register set (WHICH equals 2) from the core
file data (pointed to by CORE_REG_SECT), and update gdb's idea of
their current values. The CORE_REG_SIZE parameter is compared to
the size of the gregset or fpgregset structures (as appropriate) to
validate the size of the structure from the core file. The
REG_ADDR parameter is ignored. */
static void
fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
CORE_ADDR reg_addr)
{
gdb_gregset_t gregset;
gdb_fpregset_t fpregset;
if (which == 0)
{
if (core_reg_size != sizeof (gregset))
{
warning ("wrong size gregset struct in core file");
}
else
{
memcpy ((char *) &gregset, core_reg_sect, sizeof (gregset));
supply_gregset (&gregset);
}
}
else if (which == 2)
{
if (core_reg_size != sizeof (fpregset))
{
warning ("wrong size fpregset struct in core file");
}
else
{
memcpy ((char *) &fpregset, core_reg_sect, sizeof (fpregset));
supply_fpregset (&fpregset);
}
}
}
#include <setjmp.h>
static struct core_fns interix_core_fns =
{
bfd_target_coff_flavour, /* core_flavour (more or less) */
default_check_format, /* check_format */
default_core_sniffer, /* core_sniffer */
fetch_core_registers, /* core_read_registers */
NULL /* next */
};
void
_initialize_core_interix (void)
{
add_core_fns (&interix_core_fns);
}
/* We don't have a /proc/pid/file or /proc/pid/exe to read a link from,
so read it from the same place ps gets the name. */
char *
child_pid_to_exec_file (int pid)
{
char *path;
char *buf;
int fd, c;
char *p;
xasprintf (&path, "/proc/%d/stat", pid);
buf = xcalloc (MAXPATHLEN + 1, sizeof (char));
make_cleanup (xfree, path);
make_cleanup (xfree, buf);
fd = open (path, O_RDONLY);
if (fd < 0)
return NULL;
/* Skip over "Argv0\t". */
lseek (fd, 6, SEEK_SET);
c = read (fd, buf, MAXPATHLEN);
close (fd);
if (c < 0)
return NULL;
buf[c] = '\0'; /* Ensure null termination. */
p = strchr (buf, '\n');
if (p != NULL)
*p = '\0';
return buf;
}
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