#include "defs.h"
#include "inferior.h"
#include "gdb_assert.h"
#include <sys/types.h>
#include <sys/dir.h>
#include <sys/user.h>
#ifdef HAVE_SYS_PTRACE_H
#include <sys/ptrace.h>
#endif
#ifndef PT_READ_U
#define PT_READ_U 3
#endif
#ifdef SYS_REG_H
#include <sys/reg.h>
#else
#include <machine/reg.h>
#endif
#include "vax-tdep.h"
#include "inf-ptrace.h"
CORE_ADDR vax_kernel_u_addr = 0x80020000;
static int vax_register_index[] =
{
R0, R1, R2, R3, R4, R5,
R6, R7, R8, R9, R10, R11,
AP, FP, SP, PC, PS
};
CORE_ADDR
vax_register_u_addr (CORE_ADDR u_ar0, int regnum)
{
gdb_assert (regnum >= 0 && regnum < ARRAY_SIZE (vax_register_index));
return u_ar0 + vax_register_index[regnum - VAX_R0_REGNUM] * 4;
}
static CORE_ADDR
vax_register_u_offset (int regnum)
{
size_t u_ar0_offset = offsetof (struct user, u_ar0);
CORE_ADDR u_ar0;
int pid;
errno = 0;
pid = PIDGET (inferior_ptid);
u_ar0 = ptrace (PT_READ_U, pid, u_ar0_offset, 0);
if (errno)
perror_with_name (_("Unable to determine location of registers"));
return vax_register_u_addr (u_ar0, regnum) - vax_kernel_u_addr;
}
#include <nlist.h>
#ifndef _PATH_UNIX
#define _PATH_UNIX "/vmunix"
#endif
void _initialize_vax_nat (void);
void
_initialize_vax_nat (void)
{
struct nlist names[2];
names[0].n_name = "_u";
names[1].n_name = NULL;
if (nlist (_PATH_UNIX, names) == 0)
vax_kernel_u_addr = names[0].n_value;
add_target (inf_ptrace_trad_target (vax_register_u_offset));
}