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. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "frame.h"
#include "inferior.h"
#include "target.h"
+#include "gdbcore.h"
#include <sys/ptrace.h>
#include <sys/wait.h>
#include <sys/fpp.h>
static unsigned long registers_addr PARAMS ((int pid));
+static void fetch_core_registers PARAMS ((char *, unsigned, int, CORE_ADDR);
#define X(ENTRY)(offsetof(struct econtext, ENTRY))
X(fault), /* we just substitute these two in the hopes
that they are useful. */
};
-#endif
+#endif /* I386 */
#ifdef M68K
/* Mappings from tm-m68k.h */
X(ssw), /* fpcode */
X(fault), /* fpflags */
};
-#endif
+#endif /* M68K */
#ifdef SPARC
/* Mappings from tm-sparc.h */
FX(fsr), /* fpsr */
-1, /* cpsr */
};
-#endif
+#endif /* SPARC */
+
+#ifdef rs6000
+
+static int regmap[] =
+{
+ X(iregs[0]), /* r0 */
+ X(iregs[1]),
+ X(iregs[2]),
+ X(iregs[3]),
+ X(iregs[4]),
+ X(iregs[5]),
+ X(iregs[6]),
+ X(iregs[7]),
+ X(iregs[8]),
+ X(iregs[9]),
+ X(iregs[10]),
+ X(iregs[11]),
+ X(iregs[12]),
+ X(iregs[13]),
+ X(iregs[14]),
+ X(iregs[15]),
+ X(iregs[16]),
+ X(iregs[17]),
+ X(iregs[18]),
+ X(iregs[19]),
+ X(iregs[20]),
+ X(iregs[21]),
+ X(iregs[22]),
+ X(iregs[23]),
+ X(iregs[24]),
+ X(iregs[25]),
+ X(iregs[26]),
+ X(iregs[27]),
+ X(iregs[28]),
+ X(iregs[29]),
+ X(iregs[30]),
+ X(iregs[31]),
+
+ X(fregs[0]), /* f0 */
+ X(fregs[1]),
+ X(fregs[2]),
+ X(fregs[3]),
+ X(fregs[4]),
+ X(fregs[5]),
+ X(fregs[6]),
+ X(fregs[7]),
+ X(fregs[8]),
+ X(fregs[9]),
+ X(fregs[10]),
+ X(fregs[11]),
+ X(fregs[12]),
+ X(fregs[13]),
+ X(fregs[14]),
+ X(fregs[15]),
+ X(fregs[16]),
+ X(fregs[17]),
+ X(fregs[18]),
+ X(fregs[19]),
+ X(fregs[20]),
+ X(fregs[21]),
+ X(fregs[22]),
+ X(fregs[23]),
+ X(fregs[24]),
+ X(fregs[25]),
+ X(fregs[26]),
+ X(fregs[27]),
+ X(fregs[28]),
+ X(fregs[29]),
+ X(fregs[30]),
+ X(fregs[31]),
+
+ X(srr0), /* IAR (PC) */
+ X(srr1), /* MSR (PS) */
+ X(cr), /* CR */
+ X(lr), /* LR */
+ X(ctr), /* CTR */
+ X(xer), /* XER */
+ X(mq) /* MQ */
+};
+
+#endif /* rs6000 */
#ifdef SPARC
retval = ptrace (PTRACE_GETREGS, inferior_pid, (PTRACE_ARG3_TYPE) &ec,
0);
if (errno)
- perror_with_name ("Sparc fetch_inferior_registers(ptrace)");
+ perror_with_name ("ptrace(PTRACE_GETREGS)");
memset (buf, 0, REGISTER_RAW_SIZE (G0_REGNUM));
supply_register (G0_REGNUM, buf);
retval = ptrace (PTRACE_GETFPREGS, inferior_pid, (PTRACE_ARG3_TYPE) &fc,
0);
if (errno)
- perror_with_name ("Sparc fetch_inferior_registers(ptrace)");
+ perror_with_name ("ptrace(PTRACE_GETFPREGS)");
memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], fc.f.fregs,
32 * REGISTER_RAW_SIZE (FP0_REGNUM));
retval = ptrace (PTRACE_SETREGS, inferior_pid, (PTRACE_ARG3_TYPE) &ec,
0);
if (errno)
- perror_with_name ("Sparc fetch_inferior_registers(ptrace)");
+ perror_with_name ("ptrace(PTRACE_SETREGS)");
}
if (whatregs & WHATREGS_STACK)
retval = ptrace (PTRACE_GETFPREGS, inferior_pid, (PTRACE_ARG3_TYPE) &fc,
0);
if (errno)
- perror_with_name ("Sparc fetch_inferior_registers(ptrace)");
+ perror_with_name ("ptrace(PTRACE_GETFPREGS)");
memcpy (fc.f.fregs, ®isters[REGISTER_BYTE (FP0_REGNUM)],
32 * REGISTER_RAW_SIZE (FP0_REGNUM));
retval = ptrace (PTRACE_SETFPREGS, inferior_pid, (PTRACE_ARG3_TYPE) &fc,
0);
if (errno)
- perror_with_name ("Sparc fetch_inferior_registers(ptrace)");
+ perror_with_name ("ptrace(PTRACE_SETFPREGS)");
}
}
#endif /* SPARC */
-#ifndef SPARC
+#if defined (I386) || defined (M68K) || defined (rs6000)
/* Return the offset relative to the start of the per-thread data to the
saved context block. */
stblock = (CORE_ADDR) ptrace (PTRACE_THREADUSER, pid, (PTRACE_ARG3_TYPE)0,
0);
if (errno)
- perror_with_name ("registers_addr(PTRACE_THREADUSER)");
+ perror_with_name ("ptrace(PTRACE_THREADUSER)");
ecp = (CORE_ADDR) ptrace (PTRACE_PEEKTHREAD, pid, (PTRACE_ARG3_TYPE)ecpoff,
0);
if (errno)
- perror_with_name ("registers_addr(PTRACE_PEEKTHREAD)");
+ perror_with_name ("ptrace(PTRACE_PEEKTHREAD)");
return ecp - stblock;
}
char buf[MAX_REGISTER_RAW_SIZE];
int ptrace_fun = PTRACE_PEEKTHREAD;
-#ifdef PTRACE_PEEKUSP
+#ifdef M68K
ptrace_fun = regno == SP_REGNUM ? PTRACE_PEEKUSP : PTRACE_PEEKTHREAD;
#endif
reg = ptrace (ptrace_fun, inferior_pid,
(PTRACE_ARG3_TYPE) (ecp + regmap[regno] + i), 0);
if (errno)
- perror_with_name ("fetch_inferior_registers(ptrace)");
+ perror_with_name ("ptrace(PTRACE_PEEKUSP)");
*(int *)&buf[i] = reg;
}
If REGNO is -1, do this for all registers.
Otherwise, REGNO specifies which register (so we can save time). */
+/* Registers we shouldn't try to store. */
+#if !defined (CANNOT_STORE_REGISTER)
+#define CANNOT_STORE_REGISTER(regno) 0
+#endif
+
void
store_inferior_registers (regno)
int regno;
{
int ptrace_fun = PTRACE_POKEUSER;
-#ifdef PTRACE_POKEUSP
+ if (CANNOT_STORE_REGISTER (regno))
+ continue;
+
+#ifdef M68K
ptrace_fun = regno == SP_REGNUM ? PTRACE_POKEUSP : PTRACE_POKEUSER;
#endif
ptrace (ptrace_fun, inferior_pid,
(PTRACE_ARG3_TYPE) (ecp + regmap[regno] + i), reg);
if (errno)
- perror_with_name ("PTRACE_POKEUSER");
+ perror_with_name ("ptrace(PTRACE_POKEUSP)");
}
}
}
-#endif /* ifndef SPARC */
+#endif /* defined (I386) || defined (M68K) || defined (rs6000) */
/* Wait for child to do something. Return pid of child, or -1 in case
of error; store status through argument pointer OURSTATUS. */
{
int save_errno;
int thread;
- int status;
+ union wait status;
while (1)
{
int sig;
- if (attach_flag)
- set_sigint_trap(); /* Causes SIGINT to be passed on to the
+ set_sigint_trap(); /* Causes SIGINT to be passed on to the
attached process. */
pid = wait (&status);
-#ifdef SPARC
-/* Swap halves of status so that the rest of GDB can understand it */
- status = (status << 16) | ((unsigned)status >> 16);
-#endif
save_errno = errno;
- if (attach_flag)
- clear_sigint_trap();
+ clear_sigint_trap();
if (pid == -1)
{
if (pid != PIDGET (inferior_pid)) /* Some other process?!? */
continue;
-/* thread = WIFTID (status);*/
- thread = status >> 16;
+ thread = status.w_tid; /* Get thread id from status */
/* Initial thread value can only be acquired via wait, so we have to
resort to this hack. */
- if (TIDGET (inferior_pid) == 0)
+ if (TIDGET (inferior_pid) == 0 && thread != 0)
{
inferior_pid = BUILDPID (inferior_pid, thread);
add_thread (inferior_pid);
pid = BUILDPID (pid, thread);
- store_waitstatus (ourstatus, status);
+ /* We've become a single threaded process again. */
+ if (thread == 0)
+ inferior_pid = pid;
+
+ /* Check for thread creation. */
+ if (WIFSTOPPED(status)
+ && WSTOPSIG(status) == SIGTRAP
+ && !in_thread_list (pid))
+ {
+ int realsig;
+
+ realsig = ptrace (PTRACE_GETTRACESIG, pid, (PTRACE_ARG3_TYPE)0, 0);
+
+ if (realsig == SIGNEWTHREAD)
+ {
+ /* It's a new thread notification. We don't want to much with
+ realsig -- the code in wait_for_inferior expects SIGTRAP. */
+ ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
+ ourstatus->value.sig = TARGET_SIGNAL_0;
+ return pid;
+ }
+ else
+ error ("Signal for unknown thread was not SIGNEWTHREAD");
+ }
+
+ /* Check for thread termination. */
+ else if (WIFSTOPPED(status)
+ && WSTOPSIG(status) == SIGTRAP
+ && in_thread_list (pid))
+ {
+ int realsig;
+
+ realsig = ptrace (PTRACE_GETTRACESIG, pid, (PTRACE_ARG3_TYPE)0, 0);
+
+ if (realsig == SIGTHREADEXIT)
+ {
+ ptrace (PTRACE_CONT, PIDGET (pid), (PTRACE_ARG3_TYPE)0, 0);
+ continue;
+ }
+ }
+
+#ifdef SPARC
+ /* SPARC Lynx uses an byte reversed wait status; we must use the
+ host macros to access it. These lines just a copy of
+ store_waitstatus. We can't use CHILD_SPECIAL_WAITSTATUS
+ because target.c can't include the Lynx <sys/wait.h>. */
+ if (WIFEXITED (status))
+ {
+ ourstatus->kind = TARGET_WAITKIND_EXITED;
+ ourstatus->value.integer = WEXITSTATUS (status);
+ }
+ else if (!WIFSTOPPED (status))
+ {
+ ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
+ ourstatus->value.sig =
+ target_signal_from_host (WTERMSIG (status));
+ }
+ else
+ {
+ ourstatus->kind = TARGET_WAITKIND_STOPPED;
+ ourstatus->value.sig =
+ target_signal_from_host (WSTOPSIG (status));
+ }
+#else
+ store_waitstatus (ourstatus, status.w_status);
+#endif
return pid;
}
}
+/* Return nonzero if the given thread is still alive. */
+int
+child_thread_alive (pid)
+ int pid;
+{
+ /* Arggh. Apparently pthread_kill only works for threads within
+ the process that calls pthread_kill.
+
+ We want to avoid the lynx signal extensions as they simply don't
+ map well to the generic gdb interface we want to keep.
+
+ All we want to do is determine if a particular thread is alive;
+ it appears as if we can just make a harmless thread specific
+ ptrace call to do that. */
+ return (ptrace (PTRACE_THREADUSER, pid, 0, 0) != -1);
+}
+
+/* Resume execution of the inferior process.
+ If STEP is nonzero, single-step it.
+ If SIGNAL is nonzero, give it that signal. */
+
+void
+child_resume (pid, step, signal)
+ int pid;
+ int step;
+ enum target_signal signal;
+{
+ int func;
+
+ errno = 0;
+
+ /* If pid == -1, then we want to step/continue all threads, else
+ we only want to step/continue a single thread. */
+ if (pid == -1)
+ {
+ pid = inferior_pid;
+ func = step ? PTRACE_SINGLESTEP : PTRACE_CONT;
+ }
+ else
+ func = step ? PTRACE_SINGLESTEP_ONE : PTRACE_CONT_ONE;
+
+
+ /* An address of (PTRACE_ARG3_TYPE)1 tells ptrace to continue from where
+ it was. (If GDB wanted it to start some other way, we have already
+ written a new PC value to the child.)
+
+ If this system does not support PT_STEP, a higher level function will
+ have called single_step() to transmute the step request into a
+ continue request (by setting breakpoints on all possible successor
+ instructions), so we don't have to worry about that here. */
+
+ ptrace (func, pid, (PTRACE_ARG3_TYPE) 1, target_signal_to_host (signal));
+
+ if (errno)
+ perror_with_name ("ptrace");
+}
+
/* Convert a Lynx process ID to a string. Returns the string in a static
buffer. */
Original upage address X is at location core_reg_sect+x+reg_addr.
*/
-void
+static 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;
+ CORE_ADDR 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]);
+ if (regmap[regno] != -1)
+ supply_register (regno, core_reg_sect + offsetof (st_t, ec)
+ + regmap[regno]);
#ifdef SPARC
/* Fetching this register causes all of the I & L regs to be read from the
fetch_inferior_registers (I0_REGNUM);
#endif
}
+
+\f
+/* Register that we are able to handle lynx core file formats.
+ FIXME: is this really bfd_target_unknown_flavour? */
+
+static struct core_fns lynx_core_fns =
+{
+ bfd_target_unknown_flavour,
+ fetch_core_registers,
+ NULL
+};
+
+void
+_initialize_core_lynx ()
+{
+ add_core_fns (&lynx_core_fns);
+}
projects / binutils.git / blobdiff