316 lines
7.4 KiB
C
316 lines
7.4 KiB
C
/* Native-dependent code for LynxOS.
|
|
Copyright 1993, 1994 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|
|
|
#include "defs.h"
|
|
#include "frame.h"
|
|
#include "inferior.h"
|
|
#include "target.h"
|
|
|
|
#include <sys/ptrace.h>
|
|
#include <sys/wait.h>
|
|
|
|
static unsigned long registers_addr PARAMS ((int pid));
|
|
|
|
#define X(ENTRY)(offsetof(struct econtext, ENTRY))
|
|
|
|
#ifdef I386
|
|
/* Mappings from tm-i386v.h */
|
|
|
|
static int regmap[] =
|
|
{
|
|
X(eax),
|
|
X(ecx),
|
|
X(edx),
|
|
X(ebx),
|
|
X(esp), /* sp */
|
|
X(ebp), /* fp */
|
|
X(esi),
|
|
X(edi),
|
|
X(eip), /* pc */
|
|
X(flags), /* ps */
|
|
X(cs),
|
|
X(ss),
|
|
X(ds),
|
|
X(es),
|
|
X(ecode), /* Lynx doesn't give us either fs or gs, so */
|
|
X(fault), /* we just substitute these two in the hopes
|
|
that they are useful. */
|
|
};
|
|
#endif
|
|
|
|
#ifdef M68K
|
|
/* Mappings from tm-m68k.h */
|
|
|
|
static int regmap[] =
|
|
{
|
|
X(regs[0]), /* d0 */
|
|
X(regs[1]), /* d1 */
|
|
X(regs[2]), /* d2 */
|
|
X(regs[3]), /* d3 */
|
|
X(regs[4]), /* d4 */
|
|
X(regs[5]), /* d5 */
|
|
X(regs[6]), /* d6 */
|
|
X(regs[7]), /* d7 */
|
|
X(regs[8]), /* a0 */
|
|
X(regs[9]), /* a1 */
|
|
X(regs[10]), /* a2 */
|
|
X(regs[11]), /* a3 */
|
|
X(regs[12]), /* a4 */
|
|
X(regs[13]), /* a5 */
|
|
X(regs[14]), /* fp */
|
|
offsetof (st_t, usp) - offsetof (st_t, ec), /* sp */
|
|
X(status), /* ps */
|
|
X(pc),
|
|
|
|
X(fregs[0*3]), /* fp0 */
|
|
X(fregs[1*3]), /* fp1 */
|
|
X(fregs[2*3]), /* fp2 */
|
|
X(fregs[3*3]), /* fp3 */
|
|
X(fregs[4*3]), /* fp4 */
|
|
X(fregs[5*3]), /* fp5 */
|
|
X(fregs[6*3]), /* fp6 */
|
|
X(fregs[7*3]), /* fp7 */
|
|
|
|
X(fcregs[0]), /* fpcontrol */
|
|
X(fcregs[1]), /* fpstatus */
|
|
X(fcregs[2]), /* fpiaddr */
|
|
X(ssw), /* fpcode */
|
|
X(fault), /* fpflags */
|
|
};
|
|
#endif
|
|
|
|
/* Return the offset relative to the start of the per-thread data to the
|
|
saved context block. */
|
|
|
|
static unsigned long
|
|
registers_addr(pid)
|
|
int pid;
|
|
{
|
|
CORE_ADDR stblock;
|
|
int ecpoff = offsetof(st_t, ecp);
|
|
CORE_ADDR ecp;
|
|
|
|
errno = 0;
|
|
stblock = (CORE_ADDR) ptrace (PTRACE_THREADUSER, pid, (PTRACE_ARG3_TYPE)0,
|
|
0);
|
|
if (errno)
|
|
perror_with_name ("registers_addr(PTRACE_THREADUSER)");
|
|
|
|
ecp = (CORE_ADDR) ptrace (PTRACE_PEEKTHREAD, pid, (PTRACE_ARG3_TYPE)ecpoff,
|
|
0);
|
|
if (errno)
|
|
perror_with_name ("registers_addr(PTRACE_PEEKTHREAD)");
|
|
|
|
return ecp - stblock;
|
|
}
|
|
|
|
/* Fetch one or more registers from the inferior. REGNO == -1 to get
|
|
them all. We actually fetch more than requested, when convenient,
|
|
marking them as valid so we won't fetch them again. */
|
|
|
|
void
|
|
fetch_inferior_registers (regno)
|
|
int regno;
|
|
{
|
|
int reglo, reghi;
|
|
int i;
|
|
unsigned long ecp;
|
|
|
|
if (regno == -1)
|
|
{
|
|
reglo = 0;
|
|
reghi = NUM_REGS - 1;
|
|
}
|
|
else
|
|
reglo = reghi = regno;
|
|
|
|
ecp = registers_addr (inferior_pid);
|
|
|
|
for (regno = reglo; regno <= reghi; regno++)
|
|
{
|
|
char buf[MAX_REGISTER_RAW_SIZE];
|
|
int ptrace_fun = PTRACE_PEEKTHREAD;
|
|
|
|
#ifdef PTRACE_PEEKUSP
|
|
ptrace_fun = regno == SP_REGNUM ? PTRACE_PEEKUSP : PTRACE_PEEKTHREAD;
|
|
#endif
|
|
|
|
for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
|
|
{
|
|
unsigned int reg;
|
|
|
|
errno = 0;
|
|
reg = ptrace (ptrace_fun, inferior_pid,
|
|
(PTRACE_ARG3_TYPE) (ecp + regmap[regno] + i), 0);
|
|
if (errno)
|
|
perror_with_name ("fetch_inferior_registers(ptrace)");
|
|
|
|
*(int *)&buf[i] = reg;
|
|
}
|
|
supply_register (regno, buf);
|
|
}
|
|
}
|
|
|
|
/* Store our register values back into the inferior.
|
|
If REGNO is -1, do this for all registers.
|
|
Otherwise, REGNO specifies which register (so we can save time). */
|
|
|
|
void
|
|
store_inferior_registers (regno)
|
|
int regno;
|
|
{
|
|
int reglo, reghi;
|
|
int i;
|
|
unsigned long ecp;
|
|
|
|
if (regno == -1)
|
|
{
|
|
reglo = 0;
|
|
reghi = NUM_REGS - 1;
|
|
}
|
|
else
|
|
reglo = reghi = regno;
|
|
|
|
ecp = registers_addr (inferior_pid);
|
|
|
|
for (regno = reglo; regno <= reghi; regno++)
|
|
{
|
|
int ptrace_fun = PTRACE_POKEUSER;
|
|
|
|
#ifdef PTRACE_POKEUSP
|
|
ptrace_fun = regno == SP_REGNUM ? PTRACE_POKEUSP : PTRACE_POKEUSER;
|
|
#endif
|
|
|
|
for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
|
|
{
|
|
unsigned int reg;
|
|
|
|
reg = *(unsigned int *)®isters[REGISTER_BYTE (regno) + i];
|
|
|
|
errno = 0;
|
|
ptrace (ptrace_fun, inferior_pid,
|
|
(PTRACE_ARG3_TYPE) (ecp + regmap[regno] + i), reg);
|
|
if (errno)
|
|
perror_with_name ("PTRACE_POKEUSER");
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Wait for child to do something. Return pid of child, or -1 in case
|
|
of error; store status through argument pointer OURSTATUS. */
|
|
|
|
int
|
|
child_wait (pid, ourstatus)
|
|
int pid;
|
|
struct target_waitstatus *ourstatus;
|
|
{
|
|
int save_errno;
|
|
int thread;
|
|
int status;
|
|
|
|
while (1)
|
|
{
|
|
int sig;
|
|
|
|
if (attach_flag)
|
|
set_sigint_trap(); /* Causes SIGINT to be passed on to the
|
|
attached process. */
|
|
pid = wait (status);
|
|
save_errno = errno;
|
|
|
|
if (attach_flag)
|
|
clear_sigint_trap();
|
|
|
|
if (pid == -1)
|
|
{
|
|
if (save_errno == EINTR)
|
|
continue;
|
|
fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing: %s.\n",
|
|
safe_strerror (save_errno));
|
|
/* Claim it exited with unknown signal. */
|
|
ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
|
|
ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
|
|
return -1;
|
|
}
|
|
|
|
if (pid != PIDGET (inferior_pid)) /* Some other process?!? */
|
|
continue;
|
|
|
|
/* thread = WIFTID (status);*/
|
|
thread = status >> 16;
|
|
|
|
/* Initial thread value can only be acquired via wait, so we have to
|
|
resort to this hack. */
|
|
|
|
if (TIDGET (inferior_pid) == 0)
|
|
{
|
|
inferior_pid = BUILDPID (inferior_pid, thread);
|
|
add_thread (inferior_pid);
|
|
}
|
|
|
|
pid = BUILDPID (pid, thread);
|
|
|
|
store_waitstatus (ourstatus, status);
|
|
|
|
return pid;
|
|
}
|
|
}
|
|
|
|
/* Convert a Lynx process ID to a string. Returns the string in a static
|
|
buffer. */
|
|
|
|
char *
|
|
lynx_pid_to_str (pid)
|
|
int pid;
|
|
{
|
|
static char buf[40];
|
|
|
|
sprintf (buf, "process %d thread %d", PIDGET (pid), TIDGET (pid));
|
|
|
|
return buf;
|
|
}
|
|
|
|
/* Extract the register values out of the core file and store
|
|
them where `read_register' will find them.
|
|
|
|
CORE_REG_SECT points to the register values themselves, read into memory.
|
|
CORE_REG_SIZE is the size of that area.
|
|
WHICH says which set of registers we are handling (0 = int, 2 = float
|
|
on machines where they are discontiguous).
|
|
REG_ADDR is the offset from u.u_ar0 to the register values relative to
|
|
core_reg_sect. This is used with old-fashioned core files to
|
|
locate the registers in a large upage-plus-stack ".reg" section.
|
|
Original upage address X is at location core_reg_sect+x+reg_addr.
|
|
*/
|
|
|
|
void
|
|
fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
|
|
char *core_reg_sect;
|
|
unsigned core_reg_size;
|
|
int which;
|
|
unsigned reg_addr;
|
|
{
|
|
struct st_entry s;
|
|
unsigned int regno;
|
|
|
|
for (regno = 0; regno < NUM_REGS; regno++)
|
|
supply_register (regno, core_reg_sect + offsetof (st_t, ec)
|
|
+ regmap[regno]);
|
|
}
|