#include "defs.h"
#include "frame.h"
#include "inferior.h"
#include "target.h"
#include "gdb_string.h"
#include "regcache.h"
#include "gdb_wait.h"
#include "command.h"
#ifdef USG
#include <sys/types.h>
#endif
#include <sys/param.h>
#include "gdb_dirent.h"
#include <signal.h>
#include <sys/ioctl.h>
#ifdef HAVE_PTRACE_H
#include <ptrace.h>
#else
#ifdef HAVE_SYS_PTRACE_H
#include <sys/ptrace.h>
#endif
#endif
#if !defined (PT_READ_I)
#define PT_READ_I 1
#endif
#if !defined (PT_READ_D)
#define PT_READ_D 2
#endif
#if !defined (PT_READ_U)
#define PT_READ_U 3
#endif
#if !defined (PT_WRITE_I)
#define PT_WRITE_I 4
#endif
#if !defined (PT_WRITE_D)
#define PT_WRITE_D 5
#endif
#if !defined (PT_WRITE_U)
#define PT_WRITE_U 6
#endif
#if !defined (PT_CONTINUE)
#define PT_CONTINUE 7
#endif
#if !defined (PT_STEP)
#define PT_STEP 9
#endif
#if !defined (PT_KILL)
#define PT_KILL 8
#endif
#ifndef PT_ATTACH
#define PT_ATTACH PTRACE_ATTACH
#endif
#ifndef PT_DETACH
#define PT_DETACH PTRACE_DETACH
#endif
#include "gdbcore.h"
#ifndef NO_SYS_FILE
#include <sys/file.h>
#endif
#if 0
#include "gdb_stat.h"
#endif
#if !defined (FETCH_INFERIOR_REGISTERS)
#include <sys/user.h>
#if defined (KERNEL_U_ADDR_BSD)
#include <a.out.h>
#endif
#endif
#if !defined (CHILD_XFER_MEMORY)
static void udot_info (char *, int);
#endif
#if !defined (FETCH_INFERIOR_REGISTERS)
static void fetch_register (int);
static void store_register (int);
#endif
void _initialize_kernel_u_addr (void);
void _initialize_infptrace (void);
int
call_ptrace (int request, int pid, PTRACE_ARG3_TYPE addr, int data)
{
int pt_status = 0;
#if 0
int saved_errno;
printf ("call_ptrace(request=%d, pid=%d, addr=0x%x, data=0x%x)",
request, pid, addr, data);
#endif
#if defined(PT_SETTRC)
if (request == PT_SETTRC)
{
errno = 0;
#if !defined (FIVE_ARG_PTRACE)
pt_status = ptrace (PT_SETTRC, pid, addr, data);
#else
pt_status = ptrace (PT_SETTRC, pid, addr, data, 0);
#endif
if (errno)
perror_with_name ("ptrace");
#if 0
printf (" = %d\n", pt_status);
#endif
if (pt_status < 0)
return pt_status;
else
return parent_attach_all (pid, addr, data);
}
#endif
#if defined(PT_CONTIN1)
if (request == PT_CONTINUE)
request = PT_CONTIN1;
#endif
#if defined(PT_SINGLE1)
if (request == PT_STEP)
request = PT_SINGLE1;
#endif
#if 0
saved_errno = errno;
errno = 0;
#endif
#if !defined (FIVE_ARG_PTRACE)
pt_status = ptrace (request, pid, addr, data);
#else
pt_status = ptrace (request, pid, addr, data, 0);
#endif
#if 0
if (errno)
printf (" [errno = %d]", errno);
errno = saved_errno;
printf (" = 0x%x\n", pt_status);
#endif
return pt_status;
}
#if defined (DEBUG_PTRACE) || defined (FIVE_ARG_PTRACE)
#define ptrace call_ptrace
#endif
int
ptrace_wait (ptid_t ptid, int *status)
{
int wstate;
wstate = wait (status);
target_post_wait (pid_to_ptid (wstate), *status);
return wstate;
}
#ifndef KILL_INFERIOR
void
kill_inferior (void)
{
int status;
int pid = PIDGET (inferior_ptid);
if (pid == 0)
return;
ptrace (PT_KILL, pid, (PTRACE_ARG3_TYPE) 0, 0);
ptrace_wait (null_ptid, &status);
target_mourn_inferior ();
}
#endif
#ifndef CHILD_RESUME
void
child_resume (ptid_t ptid, int step, enum target_signal signal)
{
int pid = PIDGET (ptid);
errno = 0;
if (pid == -1)
pid = PIDGET (inferior_ptid);
if (step)
{
if (SOFTWARE_SINGLE_STEP_P ())
internal_error (__FILE__, __LINE__, "failed internal consistency check");
else
ptrace (PT_STEP, pid, (PTRACE_ARG3_TYPE) 1,
target_signal_to_host (signal));
}
else
ptrace (PT_CONTINUE, pid, (PTRACE_ARG3_TYPE) 1,
target_signal_to_host (signal));
if (errno)
{
perror_with_name ("ptrace");
}
}
#endif
#ifdef ATTACH_DETACH
int
attach (int pid)
{
errno = 0;
ptrace (PT_ATTACH, pid, (PTRACE_ARG3_TYPE) 0, 0);
if (errno)
perror_with_name ("ptrace");
attach_flag = 1;
return pid;
}
void
detach (int signal)
{
errno = 0;
ptrace (PT_DETACH, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) 1,
signal);
if (errno)
print_sys_errmsg ("ptrace", errno);
attach_flag = 0;
}
#endif
#ifndef PTRACE_XFER_TYPE
#define PTRACE_XFER_TYPE int
#endif
#if defined (KERNEL_U_ADDR_BSD) && !defined (FETCH_INFERIOR_REGISTERS)
CORE_ADDR kernel_u_addr;
#endif
void
_initialize_kernel_u_addr (void)
{
#if defined (KERNEL_U_ADDR_BSD) && !defined (FETCH_INFERIOR_REGISTERS)
struct nlist names[2];
names[0].n_un.n_name = "_u";
names[1].n_un.n_name = NULL;
if (nlist ("/vmunix", names) == 0)
kernel_u_addr = names[0].n_value;
else
internal_error (__FILE__, __LINE__,
"Unable to get kernel u area address.");
#endif
}
#if !defined (FETCH_INFERIOR_REGISTERS)
#if !defined (offsetof)
#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
#endif
#if !defined (U_REGS_OFFSET)
#define U_REGS_OFFSET \
ptrace (PT_READ_U, PIDGET (inferior_ptid), \
(PTRACE_ARG3_TYPE) (offsetof (struct user, u_ar0)), 0) \
- KERNEL_U_ADDR
#endif
static void
fetch_register (int regno)
{
CORE_ADDR regaddr;
char mess[128];
int i;
unsigned int offset;
char buf[MAX_REGISTER_SIZE];
int tid;
if (CANNOT_FETCH_REGISTER (regno))
{
memset (buf, '\0', DEPRECATED_REGISTER_RAW_SIZE (regno));
supply_register (regno, buf);
return;
}
if ((tid = TIDGET (inferior_ptid)) == 0)
tid = PIDGET (inferior_ptid);
offset = U_REGS_OFFSET;
regaddr = register_addr (regno, offset);
for (i = 0; i < DEPRECATED_REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE))
{
errno = 0;
*(PTRACE_XFER_TYPE *) & buf[i] = ptrace (PT_READ_U, tid,
(PTRACE_ARG3_TYPE) regaddr, 0);
regaddr += sizeof (PTRACE_XFER_TYPE);
if (errno != 0)
{
sprintf (mess, "reading register %s (#%d)",
REGISTER_NAME (regno), regno);
perror_with_name (mess);
}
}
supply_register (regno, buf);
}
void
fetch_inferior_registers (int regno)
{
if (regno >= 0)
{
fetch_register (regno);
}
else
{
for (regno = 0; regno < NUM_REGS; regno++)
{
fetch_register (regno);
}
}
}
static void
store_register (int regno)
{
CORE_ADDR regaddr;
char mess[128];
int i;
unsigned int offset;
int tid;
char buf[MAX_REGISTER_SIZE];
if (CANNOT_STORE_REGISTER (regno))
{
return;
}
if ((tid = TIDGET (inferior_ptid)) == 0)
tid = PIDGET (inferior_ptid);
offset = U_REGS_OFFSET;
regaddr = register_addr (regno, offset);
regcache_collect (regno, buf);
for (i = 0; i < DEPRECATED_REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE))
{
errno = 0;
ptrace (PT_WRITE_U, tid, (PTRACE_ARG3_TYPE) regaddr,
*(PTRACE_XFER_TYPE *) (buf + i));
regaddr += sizeof (PTRACE_XFER_TYPE);
if (errno != 0)
{
sprintf (mess, "writing register %s (#%d)",
REGISTER_NAME (regno), regno);
perror_with_name (mess);
}
}
}
void
store_inferior_registers (int regno)
{
if (regno >= 0)
{
store_register (regno);
}
else
{
for (regno = 0; regno < NUM_REGS; regno++)
{
store_register (regno);
}
}
}
#endif
#ifndef GDB_MAX_ALLOCA
#define GDB_MAX_ALLOCA 0x1000
#endif
#if !defined (CHILD_XFER_MEMORY)
int
child_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write,
struct mem_attrib *attrib, struct target_ops *target)
{
int i;
CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_XFER_TYPE);
int count = ((((memaddr + len) - addr) + sizeof (PTRACE_XFER_TYPE) - 1)
/ sizeof (PTRACE_XFER_TYPE));
int alloc = count * sizeof (PTRACE_XFER_TYPE);
PTRACE_XFER_TYPE *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_XFER_TYPE *) alloca (alloc);
}
else
{
buffer = (PTRACE_XFER_TYPE *) xmalloc (alloc);
old_chain = make_cleanup (xfree, buffer);
}
if (write)
{
if (addr != memaddr || len < (int) sizeof (PTRACE_XFER_TYPE))
{
buffer[0] = ptrace (PT_READ_I, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) addr, 0);
}
if (count > 1)
{
buffer[count - 1] =
ptrace (PT_READ_I, PIDGET (inferior_ptid),
((PTRACE_ARG3_TYPE)
(addr + (count - 1) * sizeof (PTRACE_XFER_TYPE))), 0);
}
memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 1)),
myaddr, len);
for (i = 0; i < count; i++, addr += sizeof (PTRACE_XFER_TYPE))
{
errno = 0;
ptrace (PT_WRITE_D, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) addr, buffer[i]);
if (errno)
{
errno = 0;
ptrace (PT_WRITE_I, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) addr, buffer[i]);
}
if (errno)
return 0;
}
#ifdef CLEAR_INSN_CACHE
CLEAR_INSN_CACHE ();
#endif
}
else
{
for (i = 0; i < count; i++, addr += sizeof (PTRACE_XFER_TYPE))
{
errno = 0;
buffer[i] = ptrace (PT_READ_I, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) addr, 0);
if (errno)
return 0;
QUIT;
}
memcpy (myaddr,
(char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 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_ARG3_TYPE) 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
}