#include <fcntl.h>
#include "defs.h"
#include "inferior.h"
#include "gdb_wait.h"
#include "gdbcore.h"
#include "command.h"
#include "gdbcmd.h"
#include "floatformat.h"
#include "buildsym.h"
#include "i387-tdep.h"
#include "i386-tdep.h"
#include "value.h"
#include "regcache.h"
#include "gdb_string.h"
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>
#include <unistd.h>
#include <sys/utsname.h>
#include <io.h>
#include <dos.h>
#include <dpmi.h>
#include <go32.h>
#include <sys/farptr.h>
#include <debug/v2load.h>
#include <debug/dbgcom.h>
#if __DJGPP_MINOR__ > 2
#include <debug/redir.h>
#endif
#if __DJGPP_MINOR__ < 3
typedef struct
{
unsigned short sig0;
unsigned short sig1;
unsigned short sig2;
unsigned short sig3;
unsigned short exponent:15;
unsigned short sign:1;
}
NPXREG;
typedef struct
{
unsigned int control;
unsigned int status;
unsigned int tag;
unsigned int eip;
unsigned int cs;
unsigned int dataptr;
unsigned int datasel;
NPXREG reg[8];
}
NPX;
static NPX npx;
static void save_npx (void);
static void load_npx (void);
static void
save_npx (void)
{
asm ("inb $0xa0, %%al \n\
testb $0x20, %%al \n\
jz 1f \n\
xorb %%al, %%al \n\
outb %%al, $0xf0 \n\
movb $0x20, %%al \n\
outb %%al, $0xa0 \n\
outb %%al, $0x20 \n\
1: \n\
fnsave %0 \n\
fwait "
: "=m" (npx)
:
: "%eax");
}
static void
load_npx (void)
{
asm ("frstor %0":"=m" (npx));
}
typedef struct {
char *command;
int redirected;
} cmdline_t;
void
redir_cmdline_delete (cmdline_t *ptr)
{
ptr->redirected = 0;
}
int
redir_cmdline_parse (const char *args, cmdline_t *ptr)
{
return -1;
}
int
redir_to_child (cmdline_t *ptr)
{
return 1;
}
int
redir_to_debugger (cmdline_t *ptr)
{
return 1;
}
int
redir_debug_init (cmdline_t *ptr)
{
return 0;
}
#endif
typedef enum { wp_insert, wp_remove, wp_count } wp_op;
static int dr_ref_count[4];
#define SOME_PID 42
static int prog_has_started = 0;
static void go32_open (char *name, int from_tty);
static void go32_close (int quitting);
static void go32_attach (char *args, int from_tty);
static void go32_detach (char *args, int from_tty);
static void go32_resume (ptid_t ptid, int step,
enum target_signal siggnal);
static ptid_t go32_wait (ptid_t ptid,
struct target_waitstatus *status);
static void go32_fetch_registers (int regno);
static void store_register (int regno);
static void go32_store_registers (int regno);
static void go32_prepare_to_store (void);
static int go32_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
int write,
struct mem_attrib *attrib,
struct target_ops *target);
static void go32_files_info (struct target_ops *target);
static void go32_stop (void);
static void go32_kill_inferior (void);
static void go32_create_inferior (char *exec_file, char *args, char **env);
static void go32_mourn_inferior (void);
static int go32_can_run (void);
static struct target_ops go32_ops;
static void go32_terminal_init (void);
static void go32_terminal_inferior (void);
static void go32_terminal_ours (void);
#define r_ofs(x) (offsetof(TSS,x))
static struct
{
size_t tss_ofs;
size_t size;
}
regno_mapping[] =
{
{r_ofs (tss_eax), 4},
{r_ofs (tss_ecx), 4},
{r_ofs (tss_edx), 4},
{r_ofs (tss_ebx), 4},
{r_ofs (tss_esp), 4},
{r_ofs (tss_ebp), 4},
{r_ofs (tss_esi), 4},
{r_ofs (tss_edi), 4},
{r_ofs (tss_eip), 4},
{r_ofs (tss_eflags), 4},
{r_ofs (tss_cs), 2},
{r_ofs (tss_ss), 2},
{r_ofs (tss_ds), 2},
{r_ofs (tss_es), 2},
{r_ofs (tss_fs), 2},
{r_ofs (tss_gs), 2},
{0, 10},
{1, 10},
{2, 10},
{3, 10},
{4, 10},
{5, 10},
{6, 10},
{7, 10},
{0, 2},
{4, 2},
{8, 2},
{16, 2},
{12, 4},
{24, 2},
{20, 4},
{18, 2}
};
static struct
{
int go32_sig;
enum target_signal gdb_sig;
}
sig_map[] =
{
{0, TARGET_SIGNAL_FPE},
{1, TARGET_SIGNAL_TRAP},
{2, TARGET_SIGNAL_BUS},
{3, TARGET_SIGNAL_TRAP},
{4, TARGET_SIGNAL_FPE},
{5, TARGET_SIGNAL_SEGV},
{6, TARGET_SIGNAL_ILL},
{7, TARGET_SIGNAL_EMT},
{8, TARGET_SIGNAL_SEGV},
{9, TARGET_SIGNAL_SEGV},
{10, TARGET_SIGNAL_BUS},
{11, TARGET_SIGNAL_SEGV},
{12, TARGET_SIGNAL_SEGV},
{13, TARGET_SIGNAL_SEGV},
{14, TARGET_SIGNAL_SEGV},
{16, TARGET_SIGNAL_FPE},
{17, TARGET_SIGNAL_BUS},
{31, TARGET_SIGNAL_ILL},
{0x1b, TARGET_SIGNAL_INT},
{0x75, TARGET_SIGNAL_FPE},
{0x78, TARGET_SIGNAL_ALRM},
{0x79, TARGET_SIGNAL_INT},
{0x7a, TARGET_SIGNAL_QUIT},
{-1, TARGET_SIGNAL_LAST}
};
static struct {
enum target_signal gdb_sig;
int djgpp_excepno;
} excepn_map[] = {
{TARGET_SIGNAL_0, -1},
{TARGET_SIGNAL_ILL, 6},
{TARGET_SIGNAL_EMT, 7},
{TARGET_SIGNAL_SEGV, 13},
{TARGET_SIGNAL_BUS, 17},
{TARGET_SIGNAL_TERM, 0x1b},
{TARGET_SIGNAL_FPE, 0x75},
{TARGET_SIGNAL_INT, 0x79},
{TARGET_SIGNAL_QUIT, 0x7a},
{TARGET_SIGNAL_ALRM, 0x78},
{TARGET_SIGNAL_PROF, 0x78},
{TARGET_SIGNAL_LAST, -1}
};
static void
go32_open (char *name, int from_tty)
{
printf_unfiltered ("Done. Use the \"run\" command to run the program.\n");
}
static void
go32_close (int quitting)
{
}
static void
go32_attach (char *args, int from_tty)
{
error ("\
You cannot attach to a running program on this platform.\n\
Use the `run' command to run DJGPP programs.");
}
static void
go32_detach (char *args, int from_tty)
{
}
static int resume_is_step;
static int resume_signal = -1;
static void
go32_resume (ptid_t ptid, int step, enum target_signal siggnal)
{
int i;
resume_is_step = step;
if (siggnal != TARGET_SIGNAL_0 && siggnal != TARGET_SIGNAL_TRAP)
{
for (i = 0, resume_signal = -1;
excepn_map[i].gdb_sig != TARGET_SIGNAL_LAST; i++)
if (excepn_map[i].gdb_sig == siggnal)
{
resume_signal = excepn_map[i].djgpp_excepno;
break;
}
if (resume_signal == -1)
printf_unfiltered ("Cannot deliver signal %s on this platform.\n",
target_signal_to_name (siggnal));
}
}
static char child_cwd[FILENAME_MAX];
static ptid_t
go32_wait (ptid_t ptid, struct target_waitstatus *status)
{
int i;
unsigned char saved_opcode;
unsigned long INT3_addr = 0;
int stepping_over_INT = 0;
a_tss.tss_eflags &= 0xfeff;
if (resume_is_step)
{
read_child (a_tss.tss_eip, &saved_opcode, 1);
if (saved_opcode == 0xCD || saved_opcode == 0xCE)
{
unsigned char INT3_opcode = 0xCC;
INT3_addr
= saved_opcode == 0xCD ? a_tss.tss_eip + 2 : a_tss.tss_eip + 1;
stepping_over_INT = 1;
read_child (INT3_addr, &saved_opcode, 1);
write_child (INT3_addr, &INT3_opcode, 1);
}
else
a_tss.tss_eflags |= 0x0100;
}
if (resume_signal <= -1)
{
a_tss.tss_trap = 0;
a_tss.tss_irqn = 0xff;
}
else
{
a_tss.tss_trap = 0xffff;
a_tss.tss_irqn = resume_signal;
}
if (!*child_cwd)
getcwd (child_cwd, sizeof (child_cwd));
chdir (child_cwd);
#if __DJGPP_MINOR__ < 3
load_npx ();
#endif
run_child ();
#if __DJGPP_MINOR__ < 3
save_npx ();
#endif
if (stepping_over_INT && a_tss.tss_eip == INT3_addr + 1)
{
a_tss.tss_eip--;
write_child (a_tss.tss_eip, &saved_opcode, 1);
a_tss.tss_irqn = 1;
a_tss.tss_eflags |= 0x0100;
}
getcwd (child_cwd, sizeof (child_cwd));
chdir (current_directory);
if (a_tss.tss_irqn == 0x21)
{
status->kind = TARGET_WAITKIND_EXITED;
status->value.integer = a_tss.tss_eax & 0xff;
}
else
{
status->value.sig = TARGET_SIGNAL_UNKNOWN;
status->kind = TARGET_WAITKIND_STOPPED;
for (i = 0; sig_map[i].go32_sig != -1; i++)
{
if (a_tss.tss_irqn == sig_map[i].go32_sig)
{
#if __DJGPP_MINOR__ < 3
if ((status->value.sig = sig_map[i].gdb_sig) !=
TARGET_SIGNAL_TRAP)
status->kind = TARGET_WAITKIND_SIGNALLED;
#else
status->value.sig = sig_map[i].gdb_sig;
#endif
break;
}
}
}
return pid_to_ptid (SOME_PID);
}
static void
fetch_register (int regno)
{
if (regno < FP0_REGNUM)
supply_register (regno, (char *) &a_tss + regno_mapping[regno].tss_ofs);
else if (i386_fp_regnum_p (regno) || i386_fpc_regnum_p (regno))
i387_supply_register (regno, (char *) &npx);
else
internal_error (__FILE__, __LINE__,
"Invalid register no. %d in fetch_register.", regno);
}
static void
go32_fetch_registers (int regno)
{
if (regno >= 0)
fetch_register (regno);
else
{
for (regno = 0; regno < FP0_REGNUM; regno++)
fetch_register (regno);
i387_supply_fsave ((char *) &npx);
}
}
static void
store_register (int regno)
{
if (regno < FP0_REGNUM)
regcache_collect (regno, (char *) &a_tss + regno_mapping[regno].tss_ofs);
else if (i386_fp_regnum_p (regno) || i386_fpc_regnum_p (regno))
i387_fill_fsave ((char *) &npx, regno);
else
internal_error (__FILE__, __LINE__,
"Invalid register no. %d in store_register.", regno);
}
static void
go32_store_registers (int regno)
{
unsigned r;
if (regno >= 0)
store_register (regno);
else
{
for (r = 0; r < FP0_REGNUM; r++)
store_register (r);
i387_fill_fsave ((char *) &npx, -1);
}
}
static void
go32_prepare_to_store (void)
{
}
static int
go32_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write,
struct mem_attrib *attrib, struct target_ops *target)
{
if (write)
{
if (write_child (memaddr, myaddr, len))
{
return 0;
}
else
{
return len;
}
}
else
{
if (read_child (memaddr, myaddr, len))
{
return 0;
}
else
{
return len;
}
}
}
static cmdline_t child_cmd;
static void
go32_files_info (struct target_ops *target)
{
printf_unfiltered ("You are running a DJGPP V2 program.\n");
}
static void
go32_stop (void)
{
normal_stop ();
cleanup_client ();
inferior_ptid = null_ptid;
prog_has_started = 0;
}
static void
go32_kill_inferior (void)
{
redir_cmdline_delete (&child_cmd);
resume_signal = -1;
resume_is_step = 0;
unpush_target (&go32_ops);
}
static void
go32_create_inferior (char *exec_file, char *args, char **env)
{
extern char **environ;
jmp_buf start_state;
char *cmdline;
char **env_save = environ;
size_t cmdlen;
if (exec_file == 0)
exec_file = get_exec_file (1);
if (prog_has_started)
{
go32_stop ();
go32_kill_inferior ();
}
resume_signal = -1;
resume_is_step = 0;
*child_cwd = 0;
if (redir_debug_init (&child_cmd) == -1)
internal_error (__FILE__, __LINE__,
"Cannot allocate redirection storage: not enough memory.\n");
if (strpbrk (args, "<>"))
{
if (redir_cmdline_parse (args, &child_cmd) == 0)
args = child_cmd.command;
else
error ("Syntax error in command line.");
}
else
child_cmd.command = xstrdup (args);
cmdlen = strlen (args);
if (cmdlen > 1024*1024)
error ("Command line too long.");
cmdline = xmalloc (cmdlen + 4);
strcpy (cmdline + 1, args);
if (cmdlen < 127)
{
cmdline[0] = strlen (args);
cmdline[cmdlen + 1] = 13;
}
else
cmdline[0] = 0xff;
environ = env;
if (v2loadimage (exec_file, cmdline, start_state))
{
environ = env_save;
printf_unfiltered ("Load failed for image %s\n", exec_file);
exit (1);
}
environ = env_save;
xfree (cmdline);
edi_init (start_state);
#if __DJGPP_MINOR__ < 3
save_npx ();
#endif
inferior_ptid = pid_to_ptid (SOME_PID);
push_target (&go32_ops);
clear_proceed_status ();
insert_breakpoints ();
proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
prog_has_started = 1;
}
static void
go32_mourn_inferior (void)
{
i386_cleanup_dregs ();
go32_kill_inferior ();
generic_mourn_inferior ();
}
static int
go32_can_run (void)
{
return 1;
}
#define D_REGS edi.dr
#define CONTROL D_REGS[7]
#define STATUS D_REGS[6]
void
go32_set_dr (int i, CORE_ADDR addr)
{
if (i < 0 || i > 3)
internal_error (__FILE__, __LINE__,
"Invalid register %d in go32_set_dr.\n", i);
D_REGS[i] = addr;
}
void
go32_set_dr7 (unsigned val)
{
CONTROL = val;
}
unsigned
go32_get_dr6 (void)
{
return STATUS;
}
static int
device_mode (int fd, int raw_p)
{
int oldmode, newmode;
__dpmi_regs regs;
regs.x.ax = 0x4400;
regs.x.bx = fd;
__dpmi_int (0x21, ®s);
if (regs.x.flags & 1)
return -1;
newmode = oldmode = regs.x.dx;
if (raw_p)
newmode |= 0x20;
else
newmode &= ~0x20;
if (oldmode & 0x80)
{
regs.x.ax = 0x4401;
regs.x.bx = fd;
regs.x.dx = newmode & 0xff;
__dpmi_int (0x21, ®s);
if (regs.x.flags & 1)
return -1;
}
return (oldmode & 0x20) == 0x20;
}
static int inf_mode_valid = 0;
static int inf_terminal_mode;
static int terminal_is_ours = 1;
static void
go32_terminal_init (void)
{
inf_mode_valid = 0;
terminal_is_ours = 1;
}
static void
go32_terminal_info (char *args, int from_tty)
{
printf_unfiltered ("Inferior's terminal is in %s mode.\n",
!inf_mode_valid
? "default" : inf_terminal_mode ? "raw" : "cooked");
#if __DJGPP_MINOR__ > 2
if (child_cmd.redirection)
{
int i;
for (i = 0; i < DBG_HANDLES; i++)
{
if (child_cmd.redirection[i]->file_name)
printf_unfiltered ("\tFile handle %d is redirected to `%s'.\n",
i, child_cmd.redirection[i]->file_name);
else if (_get_dev_info (child_cmd.redirection[i]->inf_handle) == -1)
printf_unfiltered
("\tFile handle %d appears to be closed by inferior.\n", i);
else if ((_get_dev_info (child_cmd.redirection[i]->inf_handle) & 0xdf)
!= (_get_dev_info (i) & 0xdf))
printf_unfiltered
("\tFile handle %d appears to be redirected by inferior.\n", i);
}
}
#endif
}
static void
go32_terminal_inferior (void)
{
errno = 0;
if (redir_to_child (&child_cmd) == -1)
{
redir_to_debugger (&child_cmd);
error ("Cannot redirect standard handles for program: %s.",
safe_strerror (errno));
}
if (terminal_is_ours)
{
if (inf_mode_valid)
device_mode (0, inf_terminal_mode);
terminal_is_ours = 0;
}
}
static void
go32_terminal_ours (void)
{
if (!terminal_is_ours)
{
inf_terminal_mode = device_mode (0, 0);
if (inf_terminal_mode != -1)
inf_mode_valid = 1;
else
inf_mode_valid = 0;
terminal_is_ours = 1;
errno = 0;
if (redir_to_debugger (&child_cmd) == -1)
{
redir_to_child (&child_cmd);
error ("Cannot redirect standard handles for debugger: %s.",
safe_strerror (errno));
}
}
}
static void
init_go32_ops (void)
{
go32_ops.to_shortname = "djgpp";
go32_ops.to_longname = "djgpp target process";
go32_ops.to_doc =
"Program loaded by djgpp, when gdb is used as an external debugger";
go32_ops.to_open = go32_open;
go32_ops.to_close = go32_close;
go32_ops.to_attach = go32_attach;
go32_ops.to_detach = go32_detach;
go32_ops.to_resume = go32_resume;
go32_ops.to_wait = go32_wait;
go32_ops.to_fetch_registers = go32_fetch_registers;
go32_ops.to_store_registers = go32_store_registers;
go32_ops.to_prepare_to_store = go32_prepare_to_store;
go32_ops.to_xfer_memory = go32_xfer_memory;
go32_ops.to_files_info = go32_files_info;
go32_ops.to_insert_breakpoint = memory_insert_breakpoint;
go32_ops.to_remove_breakpoint = memory_remove_breakpoint;
go32_ops.to_terminal_init = go32_terminal_init;
go32_ops.to_terminal_inferior = go32_terminal_inferior;
go32_ops.to_terminal_ours_for_output = go32_terminal_ours;
go32_ops.to_terminal_ours = go32_terminal_ours;
go32_ops.to_terminal_info = go32_terminal_info;
go32_ops.to_kill = go32_kill_inferior;
go32_ops.to_create_inferior = go32_create_inferior;
go32_ops.to_mourn_inferior = go32_mourn_inferior;
go32_ops.to_can_run = go32_can_run;
go32_ops.to_stop = go32_stop;
go32_ops.to_stratum = process_stratum;
go32_ops.to_has_all_memory = 1;
go32_ops.to_has_memory = 1;
go32_ops.to_has_stack = 1;
go32_ops.to_has_registers = 1;
go32_ops.to_has_execution = 1;
go32_ops.to_magic = OPS_MAGIC;
*child_cwd = 0;
if (redir_debug_init (&child_cmd) == -1)
internal_error (__FILE__, __LINE__,
"Cannot allocate redirection storage: not enough memory.\n");
processing_gcc_compilation = 2;
}
unsigned short windows_major, windows_minor;
static void
go32_get_windows_version(void)
{
__dpmi_regs r;
r.x.ax = 0x1600;
__dpmi_int(0x2f, &r);
if (r.h.al > 2 && r.h.al != 0x80 && r.h.al != 0xff
&& (r.h.al > 3 || r.h.ah > 0))
{
windows_major = r.h.al;
windows_minor = r.h.ah;
}
else
windows_major = 0xff;
}
static void
print_mem (unsigned long datum, const char *header, int in_pages_p)
{
if (datum != 0xffffffffUL)
{
if (in_pages_p)
datum <<= 12;
puts_filtered (header);
if (datum > 1024)
{
printf_filtered ("%lu KB", datum >> 10);
if (datum > 1024 * 1024)
printf_filtered (" (%lu MB)", datum >> 20);
}
else
printf_filtered ("%lu Bytes", datum);
puts_filtered ("\n");
}
}
static void
go32_sysinfo (char *arg, int from_tty)
{
struct utsname u;
char cpuid_vendor[13];
unsigned cpuid_max = 0, cpuid_eax, cpuid_ebx, cpuid_ecx, cpuid_edx;
unsigned true_dos_version = _get_dos_version (1);
unsigned advertized_dos_version = ((unsigned int)_osmajor << 8) | _osminor;
int dpmi_flags;
char dpmi_vendor_info[129];
int dpmi_vendor_available =
__dpmi_get_capabilities (&dpmi_flags, dpmi_vendor_info);
__dpmi_version_ret dpmi_version_data;
long eflags;
__dpmi_free_mem_info mem_info;
__dpmi_regs regs;
cpuid_vendor[0] = '\0';
if (uname (&u))
strcpy (u.machine, "Unknown x86");
else if (u.machine[0] == 'i' && u.machine[1] > 4)
{
__asm__ __volatile__ ("xorl %%ebx, %%ebx;"
"xorl %%ecx, %%ecx;"
"xorl %%edx, %%edx;"
"movl $0, %%eax;"
"cpuid;"
"movl %%ebx, %0;"
"movl %%edx, %1;"
"movl %%ecx, %2;"
"movl %%eax, %3;"
: "=m" (cpuid_vendor[0]),
"=m" (cpuid_vendor[4]),
"=m" (cpuid_vendor[8]),
"=m" (cpuid_max)
:
: "%eax", "%ebx", "%ecx", "%edx");
cpuid_vendor[12] = '\0';
}
printf_filtered ("CPU Type.......................%s", u.machine);
if (cpuid_vendor[0])
printf_filtered (" (%s)", cpuid_vendor);
puts_filtered ("\n");
if (cpuid_max >= 1)
{
static char *brand_name[] = {
"",
" Celeron",
" III",
" III Xeon",
"", "", "", "",
" 4"
};
char cpu_string[80];
char cpu_brand[20];
unsigned brand_idx;
int intel_p = strcmp (cpuid_vendor, "GenuineIntel") == 0;
int amd_p = strcmp (cpuid_vendor, "AuthenticAMD") == 0;
unsigned cpu_family, cpu_model;
__asm__ __volatile__ ("movl $1, %%eax;"
"cpuid;"
: "=a" (cpuid_eax),
"=b" (cpuid_ebx),
"=d" (cpuid_edx)
:
: "%ecx");
brand_idx = cpuid_ebx & 0xff;
cpu_family = (cpuid_eax >> 8) & 0xf;
cpu_model = (cpuid_eax >> 4) & 0xf;
cpu_brand[0] = '\0';
if (intel_p)
{
if (brand_idx > 0
&& brand_idx < sizeof(brand_name)/sizeof(brand_name[0])
&& *brand_name[brand_idx])
strcpy (cpu_brand, brand_name[brand_idx]);
else if (cpu_family == 5)
{
if (((cpuid_eax >> 12) & 3) == 0 && cpu_model == 4)
strcpy (cpu_brand, " MMX");
else if (cpu_model > 1 && ((cpuid_eax >> 12) & 3) == 1)
strcpy (cpu_brand, " OverDrive");
else if (cpu_model > 1 && ((cpuid_eax >> 12) & 3) == 2)
strcpy (cpu_brand, " Dual");
}
else if (cpu_family == 6 && cpu_model < 8)
{
switch (cpu_model)
{
case 1:
strcpy (cpu_brand, " Pro");
break;
case 3:
strcpy (cpu_brand, " II");
break;
case 5:
strcpy (cpu_brand, " II Xeon");
break;
case 6:
strcpy (cpu_brand, " Celeron");
break;
case 7:
strcpy (cpu_brand, " III");
break;
}
}
}
else if (amd_p)
{
switch (cpu_family)
{
case 4:
strcpy (cpu_brand, "486/5x86");
break;
case 5:
switch (cpu_model)
{
case 0:
case 1:
case 2:
case 3:
strcpy (cpu_brand, "-K5");
break;
case 6:
case 7:
strcpy (cpu_brand, "-K6");
break;
case 8:
strcpy (cpu_brand, "-K6-2");
break;
case 9:
strcpy (cpu_brand, "-K6-III");
break;
}
break;
case 6:
switch (cpu_model)
{
case 1:
case 2:
case 4:
strcpy (cpu_brand, " Athlon");
break;
case 3:
strcpy (cpu_brand, " Duron");
break;
}
break;
}
}
sprintf (cpu_string, "%s%s Model %d Stepping %d",
intel_p ? "Pentium" : (amd_p ? "AMD" : "ix86"),
cpu_brand, cpu_model, cpuid_eax & 0xf);
printfi_filtered (31, "%s\n", cpu_string);
if (((cpuid_edx & (6 | (0x0d << 23))) != 0)
|| ((cpuid_edx & 1) == 0)
|| (amd_p && (cpuid_edx & (3 << 30)) != 0))
{
puts_filtered ("CPU Features...................");
if ((cpuid_edx & 1) == 0)
puts_filtered ("No FPU ");
if ((cpuid_edx & (1 << 1)) != 0)
puts_filtered ("VME ");
if ((cpuid_edx & (1 << 2)) != 0)
puts_filtered ("DE ");
if ((cpuid_edx & (1 << 4)) != 0)
puts_filtered ("TSC ");
if ((cpuid_edx & (1 << 23)) != 0)
puts_filtered ("MMX ");
if ((cpuid_edx & (1 << 25)) != 0)
puts_filtered ("SSE ");
if ((cpuid_edx & (1 << 26)) != 0)
puts_filtered ("SSE2 ");
if (amd_p)
{
if ((cpuid_edx & (1 << 31)) != 0)
puts_filtered ("3DNow! ");
if ((cpuid_edx & (1 << 30)) != 0)
puts_filtered ("3DNow!Ext");
}
puts_filtered ("\n");
}
}
puts_filtered ("\n");
printf_filtered ("DOS Version....................%s %s.%s",
_os_flavor, u.release, u.version);
if (true_dos_version != advertized_dos_version)
printf_filtered (" (disguised as v%d.%d)", _osmajor, _osminor);
puts_filtered ("\n");
if (!windows_major)
go32_get_windows_version ();
if (windows_major != 0xff)
{
const char *windows_flavor;
printf_filtered ("Windows Version................%d.%02d (Windows ",
windows_major, windows_minor);
switch (windows_major)
{
case 3:
windows_flavor = "3.X";
break;
case 4:
switch (windows_minor)
{
case 0:
windows_flavor = "95, 95A, or 95B";
break;
case 3:
windows_flavor = "95B OSR2.1 or 95C OSR2.5";
break;
case 10:
windows_flavor = "98 or 98 SE";
break;
case 90:
windows_flavor = "ME";
break;
default:
windows_flavor = "9X";
break;
}
break;
default:
windows_flavor = "??";
break;
}
printf_filtered ("%s)\n", windows_flavor);
}
else if (true_dos_version == 0x532 && advertized_dos_version == 0x500)
printf_filtered ("Windows Version................Windows NT or Windows 2000\n");
puts_filtered ("\n");
if (dpmi_vendor_available == 0)
{
if (!memchr (&dpmi_vendor_info[2], 0, 126))
dpmi_vendor_info[128] = '\0';
printf_filtered ("DPMI Host......................%s v%d.%d (capabilities: %#x)\n",
&dpmi_vendor_info[2],
(unsigned)dpmi_vendor_info[0],
(unsigned)dpmi_vendor_info[1],
((unsigned)dpmi_flags & 0x7f));
}
__dpmi_get_version (&dpmi_version_data);
printf_filtered ("DPMI Version...................%d.%02d\n",
dpmi_version_data.major, dpmi_version_data.minor);
printf_filtered ("DPMI Info......................%s-bit DPMI, with%s Virtual Memory support\n",
(dpmi_version_data.flags & 1) ? "32" : "16",
(dpmi_version_data.flags & 4) ? "" : "out");
printfi_filtered (31, "Interrupts reflected to %s mode\n",
(dpmi_version_data.flags & 2) ? "V86" : "Real");
printfi_filtered (31, "Processor type: i%d86\n",
dpmi_version_data.cpu);
printfi_filtered (31, "PIC base interrupt: Master: %#x Slave: %#x\n",
dpmi_version_data.master_pic, dpmi_version_data.slave_pic);
if (prog_has_started)
{
__asm__ __volatile__ ("pushfl ; popl %0" : "=g" (eflags));
printf_filtered ("Protection.....................Ring %d (in %s), with%s I/O protection\n",
a_tss.tss_cs & 3, (a_tss.tss_cs & 4) ? "LDT" : "GDT",
(a_tss.tss_cs & 3) > ((eflags >> 12) & 3) ? "" : "out");
}
puts_filtered ("\n");
__dpmi_get_free_memory_information (&mem_info);
print_mem (mem_info.total_number_of_physical_pages,
"DPMI Total Physical Memory.....", 1);
print_mem (mem_info.total_number_of_free_pages,
"DPMI Free Physical Memory......", 1);
print_mem (mem_info.size_of_paging_file_partition_in_pages,
"DPMI Swap Space................", 1);
print_mem (mem_info.linear_address_space_size_in_pages,
"DPMI Total Linear Address Size.", 1);
print_mem (mem_info.free_linear_address_space_in_pages,
"DPMI Free Linear Address Size..", 1);
print_mem (mem_info.largest_available_free_block_in_bytes,
"DPMI Largest Free Memory Block.", 0);
regs.h.ah = 0x48;
regs.x.bx = 0xffff;
__dpmi_int (0x21, ®s);
print_mem (regs.x.bx << 4, "Free DOS Memory................", 0);
regs.x.ax = 0x5800;
__dpmi_int (0x21, ®s);
if ((regs.x.flags & 1) == 0)
{
static const char *dos_hilo[] = {
"Low", "", "", "", "High", "", "", "", "High, then Low"
};
static const char *dos_fit[] = {
"First", "Best", "Last"
};
int hilo_idx = (regs.x.ax >> 4) & 0x0f;
int fit_idx = regs.x.ax & 0x0f;
if (hilo_idx > 8)
hilo_idx = 0;
if (fit_idx > 2)
fit_idx = 0;
printf_filtered ("DOS Memory Allocation..........%s memory, %s fit\n",
dos_hilo[hilo_idx], dos_fit[fit_idx]);
regs.x.ax = 0x5802;
__dpmi_int (0x21, ®s);
if ((regs.x.flags & 1) != 0)
regs.h.al = 0;
printfi_filtered (31, "UMBs %sin DOS memory chain\n",
regs.h.al == 0 ? "not " : "");
}
}
struct seg_descr {
unsigned short limit0 __attribute__((packed));
unsigned short base0 __attribute__((packed));
unsigned char base1 __attribute__((packed));
unsigned stype:5 __attribute__((packed));
unsigned dpl:2 __attribute__((packed));
unsigned present:1 __attribute__((packed));
unsigned limit1:4 __attribute__((packed));
unsigned available:1 __attribute__((packed));
unsigned dummy:1 __attribute__((packed));
unsigned bit32:1 __attribute__((packed));
unsigned page_granular:1 __attribute__((packed));
unsigned char base2 __attribute__((packed));
};
struct gate_descr {
unsigned short offset0 __attribute__((packed));
unsigned short selector __attribute__((packed));
unsigned param_count:5 __attribute__((packed));
unsigned dummy:3 __attribute__((packed));
unsigned stype:5 __attribute__((packed));
unsigned dpl:2 __attribute__((packed));
unsigned present:1 __attribute__((packed));
unsigned short offset1 __attribute__((packed));
};
static int
read_memory_region (unsigned long addr, void *dest, size_t len)
{
unsigned long dos_ds_limit = __dpmi_get_segment_limit (_dos_ds);
int retval = 1;
if (addr <= dos_ds_limit - len)
dosmemget (addr, len, dest);
else
{
int sel = __dpmi_allocate_ldt_descriptors (1);
if (sel <= 0)
retval = 0;
else
{
int access_rights = __dpmi_get_descriptor_access_rights (sel);
size_t segment_limit = len - 1;
if (len > 1024 * 1024)
{
access_rights |= 0x8000;
segment_limit |= 0xfff;
}
else
access_rights &= ~0x8000;
if (__dpmi_set_segment_base_address (sel, addr) != -1
&& __dpmi_set_descriptor_access_rights (sel, access_rights) != -1
&& __dpmi_set_segment_limit (sel, segment_limit) != -1
&& __dpmi_get_segment_limit (sel) >= segment_limit)
movedata (sel, 0, _my_ds (), (unsigned)dest, len);
else
retval = 0;
__dpmi_free_ldt_descriptor (sel);
}
}
return retval;
}
static int
get_descriptor (unsigned long table_base, int idx, void *descr)
{
unsigned long addr = table_base + idx * 8;
if (read_memory_region (addr, descr, 8))
return (int)((struct seg_descr *)descr)->stype;
return -1;
}
struct dtr_reg {
unsigned short limit __attribute__((packed));
unsigned long base __attribute__((packed));
};
static void
display_descriptor (unsigned type, unsigned long base_addr, int idx, int force)
{
struct seg_descr descr;
struct gate_descr gate;
if (idx == 0 && type == 0)
puts_filtered ("0x000: null descriptor\n");
else if (get_descriptor (base_addr, idx, &descr) != -1)
{
static unsigned allowed_descriptors[] = {
0xffffdafeL,
0x0000c0e0L,
0xffffdafaL
};
int cpl = prog_has_started ? (a_tss.tss_cs & 3) : _my_cs () & 3;
unsigned long limit = (descr.limit1 << 16) | descr.limit0;
if (descr.present
&& (allowed_descriptors[type] & (1 << descr.stype)) != 0)
{
printf_filtered ("0x%03x: ",
type == 1
? idx : (idx * 8) | (type ? (cpl | 4) : 0));
if (descr.page_granular)
limit = (limit << 12) | 0xfff;
if (descr.stype == 1 || descr.stype == 2 || descr.stype == 3
|| descr.stype == 9 || descr.stype == 11
|| (descr.stype >= 16 && descr.stype < 32))
printf_filtered ("base=0x%02x%02x%04x limit=0x%08lx",
descr.base2, descr.base1, descr.base0, limit);
switch (descr.stype)
{
case 1:
case 3:
printf_filtered (" 16-bit TSS (task %sactive)",
descr.stype == 3 ? "" : "in");
break;
case 2:
puts_filtered (" LDT");
break;
case 4:
memcpy (&gate, &descr, sizeof gate);
printf_filtered ("selector=0x%04x offs=0x%04x%04x",
gate.selector, gate.offset1, gate.offset0);
printf_filtered (" 16-bit Call Gate (params=%d)",
gate.param_count);
break;
case 5:
printf_filtered ("TSS selector=0x%04x", descr.base0);
printfi_filtered (16, "Task Gate");
break;
case 6:
case 7:
memcpy (&gate, &descr, sizeof gate);
printf_filtered ("selector=0x%04x offs=0x%04x%04x",
gate.selector, gate.offset1, gate.offset0);
printf_filtered (" 16-bit %s Gate",
descr.stype == 6 ? "Interrupt" : "Trap");
break;
case 9:
case 11:
printf_filtered (" 32-bit TSS (task %sactive)",
descr.stype == 3 ? "" : "in");
break;
case 12:
memcpy (&gate, &descr, sizeof gate);
printf_filtered ("selector=0x%04x offs=0x%04x%04x",
gate.selector, gate.offset1, gate.offset0);
printf_filtered (" 32-bit Call Gate (params=%d)",
gate.param_count);
break;
case 14:
case 15:
memcpy (&gate, &descr, sizeof gate);
printf_filtered ("selector=0x%04x offs=0x%04x%04x",
gate.selector, gate.offset1, gate.offset0);
printf_filtered (" 32-bit %s Gate",
descr.stype == 14 ? "Interrupt" : "Trap");
break;
case 16:
case 17:
case 18:
case 19:
case 20:
case 21:
case 22:
case 23:
printf_filtered (" %s-bit Data (%s Exp-%s%s)",
descr.bit32 ? "32" : "16",
descr.stype & 2 ? "Read/Write," : "Read-Only, ",
descr.stype & 4 ? "down" : "up",
descr.stype & 1 ? "" : ", N.Acc");
break;
case 24:
case 25:
case 26:
case 27:
case 28:
case 29:
case 30:
case 31:
printf_filtered (" %s-bit Code (%s, %sConf%s)",
descr.bit32 ? "32" : "16",
descr.stype & 2 ? "Exec/Read" : "Exec-Only",
descr.stype & 4 ? "" : "N.",
descr.stype & 1 ? "" : ", N.Acc");
break;
default:
printf_filtered ("Unknown type 0x%02x", descr.stype);
break;
}
puts_filtered ("\n");
}
else if (force)
{
printf_filtered ("0x%03x: ",
type == 1
? idx : (idx * 8) | (type ? (cpl | 4) : 0));
if (!descr.present)
puts_filtered ("Segment not present\n");
else
printf_filtered ("Segment type 0x%02x is invalid in this table\n",
descr.stype);
}
}
else if (force)
printf_filtered ("0x%03x: Cannot read this descriptor\n", idx);
}
static void
go32_sldt (char *arg, int from_tty)
{
struct dtr_reg gdtr;
unsigned short ldtr = 0;
int ldt_idx;
struct seg_descr ldt_descr;
long ldt_entry = -1L;
int cpl = (prog_has_started ? a_tss.tss_cs : _my_cs ()) & 3;
if (arg && *arg)
{
while (*arg && isspace(*arg))
arg++;
if (*arg)
{
ldt_entry = parse_and_eval_long (arg);
if (ldt_entry < 0
|| (ldt_entry & 4) == 0
|| (ldt_entry & 3) != (cpl & 3))
error ("Invalid LDT entry 0x%03x.", ldt_entry);
}
}
__asm__ __volatile__ ("sgdt %0" : "=m" (gdtr) : );
__asm__ __volatile__ ("sldt %0" : "=m" (ldtr) : );
ldt_idx = ldtr / 8;
if (ldt_idx == 0)
puts_filtered ("There is no LDT.\n");
else if (get_descriptor (gdtr.base, ldt_idx, &ldt_descr) != 2)
printf_filtered ("LDT is present (at %#x), but unreadable by GDB.\n",
ldt_descr.base0
| (ldt_descr.base1 << 16)
| (ldt_descr.base2 << 24));
else
{
unsigned base =
ldt_descr.base0
| (ldt_descr.base1 << 16)
| (ldt_descr.base2 << 24);
unsigned limit = ldt_descr.limit0 | (ldt_descr.limit1 << 16);
int max_entry;
if (ldt_descr.page_granular)
limit = (limit << 12) | 0xfff;
if (limit > 0xffff)
limit = 0xffff;
max_entry = (limit + 1) / 8;
if (ldt_entry >= 0)
{
if (ldt_entry > limit)
error ("Invalid LDT entry %#x: outside valid limits [0..%#x]",
ldt_entry, limit);
display_descriptor (ldt_descr.stype, base, ldt_entry / 8, 1);
}
else
{
int i;
for (i = 0; i < max_entry; i++)
display_descriptor (ldt_descr.stype, base, i, 0);
}
}
}
static void
go32_sgdt (char *arg, int from_tty)
{
struct dtr_reg gdtr;
long gdt_entry = -1L;
int max_entry;
if (arg && *arg)
{
while (*arg && isspace(*arg))
arg++;
if (*arg)
{
gdt_entry = parse_and_eval_long (arg);
if (gdt_entry < 0 || (gdt_entry & 7) != 0)
error ("Invalid GDT entry 0x%03x: not an integral multiple of 8.",
gdt_entry);
}
}
__asm__ __volatile__ ("sgdt %0" : "=m" (gdtr) : );
max_entry = (gdtr.limit + 1) / 8;
if (gdt_entry >= 0)
{
if (gdt_entry > gdtr.limit)
error ("Invalid GDT entry %#x: outside valid limits [0..%#x]",
gdt_entry, gdtr.limit);
display_descriptor (0, gdtr.base, gdt_entry / 8, 1);
}
else
{
int i;
for (i = 0; i < max_entry; i++)
display_descriptor (0, gdtr.base, i, 0);
}
}
static void
go32_sidt (char *arg, int from_tty)
{
struct dtr_reg idtr;
long idt_entry = -1L;
int max_entry;
if (arg && *arg)
{
while (*arg && isspace(*arg))
arg++;
if (*arg)
{
idt_entry = parse_and_eval_long (arg);
if (idt_entry < 0)
error ("Invalid (negative) IDT entry %d.", idt_entry);
}
}
__asm__ __volatile__ ("sidt %0" : "=m" (idtr) : );
max_entry = (idtr.limit + 1) / 8;
if (max_entry > 0x100)
max_entry = 0x100;
if (idt_entry >= 0)
{
if (idt_entry > idtr.limit)
error ("Invalid IDT entry %#x: outside valid limits [0..%#x]",
idt_entry, idtr.limit);
display_descriptor (1, idtr.base, idt_entry, 1);
}
else
{
int i;
for (i = 0; i < max_entry; i++)
display_descriptor (1, idtr.base, i, 0);
}
}
static unsigned long pdbr;
static unsigned long
get_cr3 (void)
{
unsigned offset;
unsigned taskreg;
unsigned long taskbase, cr3;
struct dtr_reg gdtr;
if (pdbr > 0 && pdbr <= 0xfffff)
return pdbr;
__asm__ __volatile__ ("sgdt %0" : "=m" (gdtr) : );
__asm__ __volatile__ ("str %0" : "=m" (taskreg) : );
offset = gdtr.base + (taskreg & 0xfff8) + 2;
if (offset > 0xfffff)
return 0;
_farsetsel (_dos_ds);
taskbase = _farnspeekl (offset) & 0xffffffU;
taskbase += _farnspeekl (offset + 2) & 0xff000000U;
if (taskbase > 0xfffff)
return 0;
cr3 = _farnspeekl (taskbase + 0x1c) & ~0xfff;
if (cr3 > 0xfffff)
{
#if 0
unsigned long addr, pte_idx;
for (addr = 0xb0000, pte_idx = 0xb0;
pte_idx < 0xff;
addr += 0x1000, pte_idx++)
{
if (((_farnspeekl (addr + 4 * pte_idx) & 0xfffff027) ==
(_farnspeekl (addr + 0x1000) & 0xfffff027))
&& ((_farnspeekl (addr + 4 * pte_idx + 4) & 0xfffff000) == cr3))
{
cr3 = addr + 0x1000;
break;
}
}
#endif
if (cr3 > 0xfffff)
cr3 = 0;
}
return cr3;
}
static unsigned long
get_pde (int n)
{
unsigned long pde = 0;
if (pdbr && n >= 0 && n < 1024)
{
pde = _farpeekl (_dos_ds, pdbr + 4*n);
}
return pde;
}
static unsigned long
get_pte (unsigned long pde, int n)
{
unsigned long pte = 0;
if ((pde & 1) && !(pde & 0x80) && n >= 0 && n < 1024)
{
pde &= ~0xfff;
pte = _farpeekl (_dos_ds, pde + 4*n);
}
return pte;
}
static void
display_ptable_entry (unsigned long entry, int is_dir, int force, unsigned off)
{
if ((entry & 1) != 0)
{
printf_filtered ("Base=0x%05lx000", entry >> 12);
if ((entry & 0x100) && !is_dir)
puts_filtered (" Global");
if ((entry & 0x40) && !is_dir)
puts_filtered (" Dirty");
printf_filtered (" %sAcc.", (entry & 0x20) ? "" : "Not-");
printf_filtered (" %sCached", (entry & 0x10) ? "" : "Not-");
printf_filtered (" Write-%s", (entry & 8) ? "Thru" : "Back");
printf_filtered (" %s", (entry & 4) ? "Usr" : "Sup");
printf_filtered (" Read-%s", (entry & 2) ? "Write" : "Only");
if (off)
printf_filtered (" +0x%x", off);
puts_filtered ("\n");
}
else if (force)
printf_filtered ("Page%s not present or not supported; value=0x%lx.\n",
is_dir ? " Table" : "", entry >> 1);
}
static void
go32_pde (char *arg, int from_tty)
{
long pde_idx = -1, i;
if (arg && *arg)
{
while (*arg && isspace(*arg))
arg++;
if (*arg)
{
pde_idx = parse_and_eval_long (arg);
if (pde_idx < 0 || pde_idx >= 1024)
error ("Entry %ld is outside valid limits [0..1023].", pde_idx);
}
}
pdbr = get_cr3 ();
if (!pdbr)
puts_filtered ("Access to Page Directories is not supported on this system.\n");
else if (pde_idx >= 0)
display_ptable_entry (get_pde (pde_idx), 1, 1, 0);
else
for (i = 0; i < 1024; i++)
display_ptable_entry (get_pde (i), 1, 0, 0);
}
static void
display_page_table (long n, int force)
{
unsigned long pde = get_pde (n);
if ((pde & 1) != 0)
{
int i;
printf_filtered ("Page Table pointed to by Page Directory entry 0x%lx:\n", n);
for (i = 0; i < 1024; i++)
display_ptable_entry (get_pte (pde, i), 0, 0, 0);
puts_filtered ("\n");
}
else if (force)
printf_filtered ("Page Table not present; value=0x%lx.\n", pde >> 1);
}
static void
go32_pte (char *arg, int from_tty)
{
long pde_idx = -1, i;
if (arg && *arg)
{
while (*arg && isspace(*arg))
arg++;
if (*arg)
{
pde_idx = parse_and_eval_long (arg);
if (pde_idx < 0 || pde_idx >= 1024)
error ("Entry %d is outside valid limits [0..1023].", pde_idx);
}
}
pdbr = get_cr3 ();
if (!pdbr)
puts_filtered ("Access to Page Tables is not supported on this system.\n");
else if (pde_idx >= 0)
display_page_table (pde_idx, 1);
else
for (i = 0; i < 1024; i++)
display_page_table (i, 0);
}
static void
go32_pte_for_address (char *arg, int from_tty)
{
CORE_ADDR addr = 0, i;
if (arg && *arg)
{
while (*arg && isspace(*arg))
arg++;
if (*arg)
addr = parse_and_eval_address (arg);
}
if (!addr)
error_no_arg ("linear address");
pdbr = get_cr3 ();
if (!pdbr)
puts_filtered ("Access to Page Tables is not supported on this system.\n");
else
{
int pde_idx = (addr >> 22) & 0x3ff;
int pte_idx = (addr >> 12) & 0x3ff;
unsigned offs = addr & 0xfff;
printf_filtered ("Page Table entry for address 0x%llx:\n",
(unsigned long long)addr);
display_ptable_entry (get_pte (get_pde (pde_idx), pte_idx), 0, 1, offs);
}
}
static struct cmd_list_element *info_dos_cmdlist = NULL;
static void
go32_info_dos_command (char *args, int from_tty)
{
help_list (info_dos_cmdlist, "info dos ", class_info, gdb_stdout);
}
void
_initialize_go32_nat (void)
{
init_go32_ops ();
add_target (&go32_ops);
add_prefix_cmd ("dos", class_info, go32_info_dos_command,
"Print information specific to DJGPP (aka MS-DOS) debugging.",
&info_dos_cmdlist, "info dos ", 0, &infolist);
add_cmd ("sysinfo", class_info, go32_sysinfo,
"Display information about the target system, including CPU, OS, DPMI, etc.",
&info_dos_cmdlist);
add_cmd ("ldt", class_info, go32_sldt,
"Display entries in the LDT (Local Descriptor Table).\n"
"Entry number (an expression) as an argument means display only that entry.",
&info_dos_cmdlist);
add_cmd ("gdt", class_info, go32_sgdt,
"Display entries in the GDT (Global Descriptor Table).\n"
"Entry number (an expression) as an argument means display only that entry.",
&info_dos_cmdlist);
add_cmd ("idt", class_info, go32_sidt,
"Display entries in the IDT (Interrupt Descriptor Table).\n"
"Entry number (an expression) as an argument means display only that entry.",
&info_dos_cmdlist);
add_cmd ("pde", class_info, go32_pde,
"Display entries in the Page Directory.\n"
"Entry number (an expression) as an argument means display only that entry.",
&info_dos_cmdlist);
add_cmd ("pte", class_info, go32_pte,
"Display entries in Page Tables.\n"
"Entry number (an expression) as an argument means display only entries\n"
"from the Page Table pointed to by the specified Page Directory entry.",
&info_dos_cmdlist);
add_cmd ("address-pte", class_info, go32_pte_for_address,
"Display a Page Table entry for a linear address.\n"
"The address argument must be a linear address, after adding to\n"
"it the base address of the appropriate segment.\n"
"The base address of variables and functions in the debuggee's data\n"
"or code segment is stored in the variable __djgpp_base_address,\n"
"so use `__djgpp_base_address + (char *)&var' as the argument.\n"
"For other segments, look up their base address in the output of\n"
"the `info dos ldt' command.",
&info_dos_cmdlist);
}
pid_t
tcgetpgrp (int fd)
{
if (isatty (fd))
return SOME_PID;
errno = ENOTTY;
return -1;
}
int
tcsetpgrp (int fd, pid_t pgid)
{
if (isatty (fd) && pgid == SOME_PID)
return 0;
errno = pgid == SOME_PID ? ENOTTY : ENOSYS;
return -1;
}