#include "defs.h"
#include "frame.h"
#include "inferior.h"
#include "gdbcore.h"
#include <sys/param.h>
#include <sys/dir.h>
#include <sys/user.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <sys/ptrace.h>
#include <machine/reg.h>
#include <sys/file.h>
#include "gdb_stat.h"
#include <sys/core.h>
void
core_file_command (char *filename, int from_tty)
{
int val;
if (corefile)
free (corefile);
corefile = 0;
if (corechan >= 0)
close (corechan);
corechan = -1;
data_start = 0;
data_end = 0;
stack_start = STACK_END_ADDR;
stack_end = STACK_END_ADDR;
if (filename)
{
filename = tilde_expand (filename);
make_cleanup (free, filename);
if (have_inferior_p ())
error ("To look at a core file, you must kill the program with \"kill\".");
corechan = open (filename, O_RDONLY, 0);
if (corechan < 0)
perror_with_name (filename);
{
struct core corestr;
val = myread (corechan, &corestr, sizeof corestr);
if (val < 0)
perror_with_name (filename);
if (corestr.c_magic != CORE_MAGIC)
error ("\"%s\" does not appear to be a core dump file (magic 0x%x, expected 0x%x)",
filename, corestr.c_magic, (int) CORE_MAGIC);
else if (sizeof (struct core) != corestr.c_len)
error ("\"%s\" has an invalid struct core length (%d, expected %d)",
filename, corestr.c_len, (int) sizeof (struct core));
data_start = exec_data_start;
data_end = data_start + corestr.c_dsize;
stack_start = stack_end - corestr.c_ssize;
data_offset = sizeof corestr;
stack_offset = sizeof corestr + corestr.c_dsize;
memcpy (registers, &corestr.c_regs, sizeof corestr.c_regs);
memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)],
corestr.c_fpu.f_fpstatus.f_st,
sizeof corestr.c_fpu.f_fpstatus.f_st);
memcpy (®isters[REGISTER_BYTE (FPC_REGNUM)],
&corestr.c_fpu.f_fpstatus.f_ctrl,
sizeof corestr.c_fpu.f_fpstatus -
sizeof corestr.c_fpu.f_fpstatus.f_st);
memcpy (&core_aouthdr, &corestr.c_aouthdr, sizeof (struct exec));
#ifndef COFF_ENCAPSULATE
core_aouthdr.magic = corestr.c_aouthdr.a_info;
core_aouthdr.vstamp = 31252;
#endif
printf_unfiltered ("Core file is from \"%s\".\n", corestr.c_cmdname);
if (corestr.c_signo > 0)
printf_unfiltered ("Program terminated with signal %d, %s.\n",
corestr.c_signo, safe_strsignal (corestr.c_signo));
}
if (filename[0] == '/')
corefile = savestring (filename, strlen (filename));
else
{
corefile = concat (current_directory, "/", filename, NULL);
}
flush_cached_frames ();
select_frame (get_current_frame (), 0);
validate_files ();
}
else if (from_tty)
printf_unfiltered ("No core file now.\n");
}
i387_to_double (char *from, char *to)
{
long *lp;
asm ("pushl %eax");
asm ("fstcw (%esp)");
asm ("movl (%esp),%eax");
asm ("orl $0x3f,%eax");
asm ("pushl %eax");
asm ("fldcw (%esp)");
asm ("movl 8(%ebp),%eax");
asm ("fldt (%eax)");
asm ("fwait");
asm ("movl 12(%ebp),%eax");
asm ("fstpl (%eax)");
asm ("fwait");
asm ("popl %eax");
asm ("fnclex");
asm ("fldcw (%esp)");
asm ("popl %eax");
}
double_to_i387 (char *from, char *to)
{
asm ("movl 8(%ebp),%eax");
asm ("fldl (%eax)");
asm ("fwait");
asm ("movl 12(%ebp),%eax");
asm ("fstpt (%eax)");
asm ("fwait");
}
void
fetch_inferior_registers (int regno)
{
struct regs inferior_registers;
struct fp_state inferior_fp_registers;
registers_fetched ();
ptrace (PTRACE_GETREGS, inferior_pid,
(PTRACE_ARG3_TYPE) & inferior_registers);
ptrace (PTRACE_GETFPREGS, inferior_pid,
(PTRACE_ARG3_TYPE) & inferior_fp_registers);
memcpy (registers, &inferior_registers, sizeof inferior_registers);
memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], inferior_fp_registers.f_st,
sizeof inferior_fp_registers.f_st);
memcpy (®isters[REGISTER_BYTE (FPC_REGNUM)],
&inferior_fp_registers.f_ctrl,
sizeof inferior_fp_registers - sizeof inferior_fp_registers.f_st);
}
void
store_inferior_registers (int regno)
{
struct regs inferior_registers;
struct fp_state inferior_fp_registers;
memcpy (&inferior_registers, registers, 20 * 4);
memcpy (inferior_fp_registers.f_st,
®isters[REGISTER_BYTE (FP0_REGNUM)],
sizeof inferior_fp_registers.f_st);
memcpy (&inferior_fp_registers.f_ctrl,
®isters[REGISTER_BYTE (FPC_REGNUM)],
sizeof inferior_fp_registers - sizeof inferior_fp_registers.f_st);
#ifdef PTRACE_FP_BUG
if (regno == FP_REGNUM || regno == -1)
{
int stack = inferior_registers.r_reg[SP_REGNUM];
int stuff = ptrace (PTRACE_PEEKDATA, inferior_pid,
(PTRACE_ARG3_TYPE) stack);
int reg = inferior_registers.r_reg[EAX];
inferior_registers.r_reg[EAX] =
inferior_registers.r_reg[FP_REGNUM];
ptrace (PTRACE_SETREGS, inferior_pid,
(PTRACE_ARG3_TYPE) & inferior_registers);
ptrace (PTRACE_POKEDATA, inferior_pid, (PTRACE_ARG3_TYPE) stack,
0xc589);
ptrace (PTRACE_SINGLESTEP, inferior_pid, (PTRACE_ARG3_TYPE) stack,
0);
wait (0);
ptrace (PTRACE_POKEDATA, inferior_pid, (PTRACE_ARG3_TYPE) stack,
stuff);
inferior_registers.r_reg[EAX] = reg;
}
#endif
ptrace (PTRACE_SETREGS, inferior_pid,
(PTRACE_ARG3_TYPE) & inferior_registers);
ptrace (PTRACE_SETFPREGS, inferior_pid,
(PTRACE_ARG3_TYPE) & inferior_fp_registers);
}