#include "defs.h"
#include "command.h"
#include "frame.h"
#include "gdbcore.h"
#include "inferior.h"
#include "regcache.h"
#include "target.h"
#include "gdb_assert.h"
#include "gdb_wait.h"
#include "gdb_string.h"
#include <sys/param.h>
#include "gdb_dirent.h"
#include <signal.h>
#include <sys/ioctl.h>
#include "gdb_ptrace.h"
#ifdef HAVE_SYS_FILE_H
#include <sys/file.h>
#endif
#if !defined (FETCH_INFERIOR_REGISTERS)
#include <sys/user.h>
#endif
#if !defined (CHILD_XFER_MEMORY)
static void udot_info (char *, int);
#endif
void _initialize_infptrace (void);
int
call_ptrace (int request, int pid, PTRACE_ARG3_TYPE addr, int data)
{
return ptrace (request, pid, addr, data);
}
int
ptrace_wait (ptid_t ptid, int *status)
{
int wstate;
wstate = wait (status);
return wstate;
}
#ifndef DEPRECATED_KILL_INFERIOR
void
kill_inferior (void)
{
int status;
int pid = PIDGET (inferior_ptid);
if (pid == 0)
return;
ptrace (PT_KILL, pid, (PTRACE_TYPE_ARG3) 0, 0);
wait (&status);
target_mourn_inferior ();
}
#endif
#ifndef DEPRECATED_CHILD_RESUME
void
child_resume (ptid_t ptid, int step, enum target_signal signal)
{
int request = PT_CONTINUE;
int pid = PIDGET (ptid);
if (pid == -1)
pid = PIDGET (inferior_ptid);
if (step)
{
gdb_assert (!SOFTWARE_SINGLE_STEP_P ());
request = PT_STEP;
}
errno = 0;
ptrace (request, pid, (PTRACE_TYPE_ARG3)1, target_signal_to_host (signal));
if (errno != 0)
perror_with_name (("ptrace"));
}
#endif
int
attach (int pid)
{
#ifdef PT_ATTACH
errno = 0;
ptrace (PT_ATTACH, pid, (PTRACE_TYPE_ARG3) 0, 0);
if (errno != 0)
perror_with_name (("ptrace"));
attach_flag = 1;
return pid;
#else
error (_("This system does not support attaching to a process"));
#endif
}
void
detach (int signal)
{
#ifdef PT_DETACH
int pid = PIDGET (inferior_ptid);
errno = 0;
ptrace (PT_DETACH, pid, (PTRACE_TYPE_ARG3) 1, signal);
if (errno != 0)
perror_with_name (("ptrace"));
attach_flag = 0;
#else
error (_("This system does not support detaching from a process"));
#endif
}
#ifndef FETCH_INFERIOR_REGISTERS
#ifndef U_REGS_OFFSET
#ifndef offsetof
#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
#endif
#define U_REGS_OFFSET \
ptrace (PT_READ_U, PIDGET (inferior_ptid), \
(PTRACE_TYPE_ARG3) (offsetof (struct user, u_ar0)), 0) \
- KERNEL_U_ADDR
#endif
static void
fetch_register (int regnum)
{
CORE_ADDR addr;
size_t size;
PTRACE_TYPE_RET *buf;
int tid, i;
if (CANNOT_FETCH_REGISTER (regnum))
{
regcache_raw_supply (current_regcache, regnum, NULL);
return;
}
tid = TIDGET (inferior_ptid);
if (tid == 0)
tid = PIDGET (inferior_ptid);
addr = register_addr (regnum, U_REGS_OFFSET);
size = register_size (current_gdbarch, regnum);
gdb_assert ((size % sizeof (PTRACE_TYPE_RET)) == 0);
buf = alloca (size);
for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
{
errno = 0;
buf[i] = ptrace (PT_READ_U, tid, (PTRACE_TYPE_ARG3) addr, 0);
if (errno != 0)
error (_("Couldn't read register %s (#%d): %s."), REGISTER_NAME (regnum),
regnum, safe_strerror (errno));
addr += sizeof (PTRACE_TYPE_RET);
}
regcache_raw_supply (current_regcache, regnum, buf);
}
void
fetch_inferior_registers (int regnum)
{
if (regnum == -1)
for (regnum = 0; regnum < NUM_REGS; regnum++)
fetch_register (regnum);
else
fetch_register (regnum);
}
static void
store_register (int regnum)
{
CORE_ADDR addr;
size_t size;
PTRACE_TYPE_RET *buf;
int tid, i;
if (CANNOT_STORE_REGISTER (regnum))
return;
tid = TIDGET (inferior_ptid);
if (tid == 0)
tid = PIDGET (inferior_ptid);
addr = register_addr (regnum, U_REGS_OFFSET);
size = register_size (current_gdbarch, regnum);
gdb_assert ((size % sizeof (PTRACE_TYPE_RET)) == 0);
buf = alloca (size);
regcache_raw_collect (current_regcache, regnum, buf);
for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
{
errno = 0;
ptrace (PT_WRITE_U, tid, (PTRACE_TYPE_ARG3) addr, buf[i]);
if (errno != 0)
error (_("Couldn't write register %s (#%d): %s."),
REGISTER_NAME (regnum), regnum, safe_strerror (errno));
addr += sizeof (PTRACE_TYPE_RET);
}
}
void
store_inferior_registers (int regnum)
{
if (regnum == -1)
for (regnum = 0; regnum < NUM_REGS; regnum++)
store_register (regnum);
else
store_register (regnum);
}
#endif
#ifndef GDB_MAX_ALLOCA
#define GDB_MAX_ALLOCA 0x1000
#endif
#if !defined (CHILD_XFER_MEMORY)
int
child_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write,
struct mem_attrib *attrib, struct target_ops *target)
{
int i;
CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_TYPE_RET);
int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1)
/ sizeof (PTRACE_TYPE_RET));
int alloc = count * sizeof (PTRACE_TYPE_RET);
PTRACE_TYPE_RET *buffer;
struct cleanup *old_chain = NULL;
#ifdef PT_IO
{
struct ptrace_io_desc piod;
piod.piod_op = write ? PIOD_WRITE_D : PIOD_READ_D;
piod.piod_offs = (void *) memaddr;
piod.piod_addr = myaddr;
piod.piod_len = len;
if (ptrace (PT_IO, PIDGET (inferior_ptid), (caddr_t) &piod, 0) == -1)
{
if (errno != EINVAL)
return 0;
}
else
{
return piod.piod_len;
}
}
#endif
if (len < GDB_MAX_ALLOCA)
{
buffer = (PTRACE_TYPE_RET *) alloca (alloc);
}
else
{
buffer = (PTRACE_TYPE_RET *) xmalloc (alloc);
old_chain = make_cleanup (xfree, buffer);
}
if (write)
{
if (addr != memaddr || len < (int) sizeof (PTRACE_TYPE_RET))
{
buffer[0] = ptrace (PT_READ_I, PIDGET (inferior_ptid),
(PTRACE_TYPE_ARG3) addr, 0);
}
if (count > 1)
{
buffer[count - 1] =
ptrace (PT_READ_I, PIDGET (inferior_ptid),
((PTRACE_TYPE_ARG3)
(addr + (count - 1) * sizeof (PTRACE_TYPE_RET))), 0);
}
memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)),
myaddr, len);
for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET))
{
errno = 0;
ptrace (PT_WRITE_D, PIDGET (inferior_ptid),
(PTRACE_TYPE_ARG3) addr, buffer[i]);
if (errno)
{
errno = 0;
ptrace (PT_WRITE_I, PIDGET (inferior_ptid),
(PTRACE_TYPE_ARG3) addr, buffer[i]);
}
if (errno)
return 0;
}
}
else
{
for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET))
{
errno = 0;
buffer[i] = ptrace (PT_READ_I, PIDGET (inferior_ptid),
(PTRACE_TYPE_ARG3) addr, 0);
if (errno)
return 0;
QUIT;
}
memcpy (myaddr,
(char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)),
len);
}
if (old_chain != NULL)
do_cleanups (old_chain);
return len;
}
static void
udot_info (char *dummy1, int dummy2)
{
#if defined (KERNEL_U_SIZE)
long udot_off;
int udot_val;
char mess[128];
#endif
if (!target_has_execution)
{
error (_("The program is not being run."));
}
#if !defined (KERNEL_U_SIZE)
error (_("Don't know how large ``struct user'' is in this version of gdb."));
#else
for (udot_off = 0; udot_off < KERNEL_U_SIZE; udot_off += sizeof (udot_val))
{
if ((udot_off % 24) == 0)
{
if (udot_off > 0)
{
printf_filtered ("\n");
}
printf_filtered ("%s:", paddr (udot_off));
}
udot_val = ptrace (PT_READ_U, PIDGET (inferior_ptid), (PTRACE_TYPE_ARG3) udot_off, 0);
if (errno != 0)
{
sprintf (mess, "\nreading user struct at offset 0x%s",
paddr_nz (udot_off));
perror_with_name (mess);
}
printf_filtered (sizeof (int) == 4 ? " 0x%08x" : " 0x%16x", udot_val);
}
printf_filtered ("\n");
#endif
}
#endif
void
_initialize_infptrace (void)
{
#if !defined (CHILD_XFER_MEMORY)
add_info ("udot", udot_info,
_("Print contents of kernel ``struct user'' for current child."));
#endif
}